JP2017196887A - Multi-color gravure offset printing device and printing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-color gravure offset printer capable of performing multi-color gravure offset printing within one printing cycle, not only for a plane printed matter but also for a cylindrical printed matter and a three-dimensional printed matter with a thickness including a bent structure.SOLUTION: A gravure offset printer comprises: a cylindrical blanket roll 100 moving to a first direction x while rotating; and an ink transfer part including one or more ink transfer plates 310 contacting a lower end of the blanket roll 100. The gravure offset printer can print inks having respective different colors at the same positions on a matter 400 to be printed, in an overlapping manner by moving for a predetermined length to the first direction, after completion of printing a first printing part on the matter 400 to be printed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a printing apparatus and method for performing a multicolor gravure offset printing operation on a printed matter having various shapes within one rotation of a gravure blanket roll (hereinafter referred to as one printing cycle). More specifically, the present invention is suitably applied to a three-dimensional solid object having a bent structure including a plane, a bottle shape or a thick asymmetric shape, or a three-dimensional solid object itself made by a 3D printer. The present invention relates to a multicolor gravure offset printing apparatus and a printing method that perform multicolor gravure printing, perform multicolor gravure printing, and dry within one printing cycle.

  Multicolor gravure offset printing has been conventionally performed by a method in which a plurality of plate cylinders are installed around a drum having a single large radius, as described in JP-A-9-277491, etc. Open 2008-168578). However, in reality, there are often difficulties in ensuring the position adjustment and reproducibility of the drum itself, and maintaining and reproducibility of the printing accuracy on the order of 100 μm width or less by moving the printed matter by a conveyor system. In addition, there are often various accuracy difficulties caused by a plurality of drums, such as distortion of parallel accuracy of a plurality of drum installation positions due to temperature changes, determination of parallel positions, and the like. In addition, even if the width can be narrower than this, the thickness is about several μm, for example, there are problems such as high electrical resistance, inability to ensure sufficient color density, and high performance printed matter that satisfies the above There are problems to be solved, such as difficulty in full automation and parallel processing from the viewpoint of economically high-efficiency printing, and changes in print quality over time during printing. Or, during the drying process, when a part of the ultraviolet ray (UV) hits the blanket roll, the UV ink is easily solidified and the roll is damaged. There were many factors that hindered the spread of gravure offset printing compared to the silk printing method.

JP-A-9-277491 JP2008-168578

  The present invention relates to a printing apparatus and method for performing gravure offset printing on a three-dimensional shape such as a plane, a cylindrical surface, or a three-dimensional surface using one blanket roll within one printing cycle (= one rotation of the blanket roll). It is a problem to be solved by the present invention.

  Another problem to be solved by the present invention is to provide a printing apparatus and method for enabling a printer to print a desired plurality of colors within one printing cycle.

  To achieve the above object, the present invention comprises a cylindrical blanket roll that moves in a first direction while rotating, and an ink transfer portion that includes one or more ink transfer plates that are in contact with the lower end of the blanket roll. A gravure offset printing apparatus including a squeegee portion that moves in a second direction with one end in contact with the ink transfer plate, wherein the second direction is a predetermined angle with respect to the first direction, Alternatively, an orthogonal gravure offset printing apparatus is provided.

  According to the present invention, there is an effect that gravure offset printing can be performed within one printing cycle for various types of printed matter. In particular, gravure offset printing is possible not only for flat prints but also for three-dimensional solid prints having a thickness including a cylindrical print and a bent structure.

  Further, according to the present invention, it is possible to print a plurality of color inks so as to overlap each other at the same position on the printed matter, so that a desired color can be printed within one print cycle by combining the ink colors. It has an effect that can be done.

  Furthermore, according to the present invention, a large amount of printing can be performed on a plurality of printed materials within one printing cycle, so that it is possible to improve the printing speed and improve the economy through this.

These are drawings which show the whole structure of the gravure offset printing apparatus which concerns on this invention. FIG. 4 is a diagram illustrating a mode in which ink is supplied from an ink supply unit to a transfer unit. FIG. 5 is a view showing that a transfer plate on which a fine intaglio pattern is printed is placed on a transfer plate support of a transfer unit. These are drawings which show the operation state of a blade part. FIG. 4 is a cross-sectional view showing an operating state of a blade portion. FIG. 4 is a drawing showing that ink is transferred from a transfer plate to a roll. and These are figures which show other Example of the squeegee blade part which concerns on this invention. FIG. 4 is a drawing showing the length of each component of the transfer plate and roll and the transfer state of multicolor ink to the roll. FIG. 2 is a diagram illustrating a printing unit including a three-dimensional printed material. These are drawings which show that a printed matter support base rotates vertically in the up-down direction with respect to the first direction. FIG. 4 is a drawing showing that each printed matter on the printed matter support base rotates horizontally around the z direction. Is a drawing showing that the first ink portion is printed on a flat printed matter. FIG. 4 is a diagram illustrating that the printing unit moves horizontally for printing the second ink portion after the printing of the first ink portion is completed. FIG. 5 is a diagram showing that the second ink portion is printed on the printed material on which the first ink portion has already been printed. FIG. 11 is a view showing that the printed material support base rotates vertically according to the distance between the height of the three-dimensional printed material and the roll in FIG. 11. FIG. 5 is a view showing that a large number of printed materials are arranged in parallel on a printed material support base in a vertical and / or horizontal direction. FIG. 2 is a diagram illustrating a drying unit. FIG. 4 is a diagram showing that after the printing of the first ink portion is completed and the ink is dried by the drying unit, the printed material moves to a position for printing the second ink portion. These are figures which show an example of the movement-type drying part of other Example which moves according to the movement of a roll. These are drawings which show the printing part when it is a cylindrical printed matter. FIG. 5 is a diagram showing that after the first ink portion is printed on the cylindrical printed material, the first ink portion is printed on the printed material that has already been printed. FIG. 5 is a view showing still another embodiment of the drying unit when the printed matter is a cylindrical print.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing an overall configuration of a gravure offset printing apparatus according to the present invention.

  The gravure offset printing apparatus of the present invention has a flat printing shape in appearance, a blanket roll 100 that moves while rotating along a pair of parallel linear rails, an ink supply unit 200 that uniformly applies ink to an ink transfer unit, One or more ink transfer portions 300 (FIG. 2) for transferring ink to the blanket roll, which is printed so as to be in contact with the lower end of the blanket roll, and transferred to the blanket roll in front of the movement direction of the blanket roll The printing unit 400 includes a printing unit 400 on which a printed material on which the ink (printed pattern) is printed is located, and additionally includes a drying unit 600 that dries and cools the ink printed on the printing product.

  Hereinafter, the blanket roll 100 will be described in detail.

  The blanket roll 100 (hereinafter referred to as a roll for convenience of description) has a cylindrical shape or a cylindrical shape (not a perfect cylindrical shape, but has elasticity and can be approximated to a cylinder, hereinafter referred to as a cylindrical shape). In the example, it moves horizontally in the first direction shown in FIG. 1 while rotating counterclockwise. For this reason, although not shown in the drawing, the roll 100 is configured to be moved along the guide rail 110 as much as possible by rotation so that the roll can move horizontally in the same length as the rotation length of the roll. Is preferred. That is, the blanket roll 100 moves horizontally in the first direction at the same speed as the rotation speed.

  The material of the blanket roll 100 is, for example, a so-called rubber roll mainly composed of one or a combination of Teflon, silicone, vinyl chloride, urethane, epoxy and the like. As yet another embodiment, the material of the roll may be a combination such as containing inorganic particles in the main component. This depends on the intermolecular force between the ink and the printed material, and is closely related to the condition that the difference in enthalpy between the ink and the material of the printed material per unit volume is small. This is a necessary condition approximately when the intermolecular force is particularly strong.

  The material of the printed material can be very diverse, for example, organic materials such as elastic polymers, plastics, glass, silicon substrates used for semiconductors or solar cells, other metals, and paper.

  The hardness of the blanket roll 100 is normal temperature (25 degrees C) and JIS-A standard 40 degrees or less and 0 degrees or more, and has a roll thickness of 0.5 to 40 times the thickness of the three-dimensional printed material. When there is a metal shaft core in the center of the blanket roll, the thickness of the roll means the remaining portion excluding the metal shaft core.

  The rotation speed of the roll at the time of transfer (and the moving speed in the first direction) is 0.5 to 12 m / min on the transfer unit 300, and the rotation speed of the roll is important at the time of ink transfer to the blanket roll in gravure offset printing. In order to satisfy the fluid motion equation for ink. Such characteristics can be said to be a fundamental difference from pad printing, tampo printing, or screen printing.

  That is, since the blanket roll has an appropriate nip (Nip) length, a roll with a small intermolecular force is particularly necessary for a fluid that raises the ink as required (for example, in the case of a conductive ink containing a noble metal such as silver). In order to ensure physical movement, the first direction speed of the roll during roll printing is preferably 0.5 to 12 m / min.

  Furthermore, the intermolecular force between the ink transferred to the roll and the printed material is preferably selected in consideration of the above enthalpy. As a result, the movement of ink during printing can be promoted and optimized.

  In addition, the major difference between this method and other types of printing methods is the method of accurately copying the plate ink on the gravure roll of this method, so accurate reproducibility can be ensured, so the following complicated It is possible to easily perform overprinting at high speed.

  Hereinafter, the ink supply unit 200 will be described in detail with reference to FIG.

  The ink (I) can use only one color. However, the present invention assumes that multicolor printing is used, and the following plurality of colors (in the attached drawings and the following embodiments, ink portions each having four colors ( I1, I2, I3, I4) For the sake of explanation, the first (I1), second (I2), third (I3) and fourth (I4) from the right side when viewed from FIG. In the preferred embodiment, the four colors are four colors according to the CMYK (Cyan, Magenta, Yellow, Key plate / Black) hue table, and in a more preferred embodiment, the resistance to alcohol is enhanced. Therefore, UV varnish or the like can be added as the last ink.

  For each color, ink is dropped simultaneously through a plurality of ink syringes 210 having a predetermined interval (L + Δ). At the same time, the plurality of ink syringes 210 are moved by a required ink width (L) in the first direction (x direction) through a horizontal moving means such as a linear actuator, and move while dropping ink liquid linearly. In the present description, it is expressed as multi-color ink, but this is an embodiment of the invention, and includes transparent organic substances and varnishes other than ink, and inks having different properties even if they are the same color ink.

  The blade of the squeegee unit 230 moves in a state of being in contact with the transfer plate 310 of the ink transfer unit in a second direction (y) orthogonal to the moving direction of the blanket roll 100 (first direction (x)), and the ink The ink supplied linearly by the syringe is filled in the transfer intaglio groove / indentation.

  At this time, it is necessary to adjust the width in which the ink is supplied so that the respective colors are not mixed with each other. In the embodiment of the present invention, for simplicity of explanation, the width of the ink supplied and the width of the ink transfer plate 310 formed with the intaglio pattern are all indicated as L. That is, the ink is linearly supplied by the width (L) of the ink transfer plate 310. However, it is not always the same L width according to the purpose.

  As shown in FIG. 2, the ink transfer plate 310 may include a plurality of ink transfer plates. In this case, the ink transfer plate has a predetermined interval (Δ) so that the inks are not mixed with each other. It can be arranged on 330 in the form of FIG. Although the ink transfer plate 310 is illustrated as a rectangle for convenience of explanation, the ink transfer plate 310 is not necessarily a rectangle, and may have various shapes as necessary.

  Hereinafter, the squeegee stage in which ink is filled into the intaglio pattern on the ink transfer plate 310 through the blade will be described with reference to FIGS. 3 and 4.

  FIG. 3 shows four ink transfer plates 310 arranged on a plate-like transfer plate support base 330 of the ink transfer unit 300.

  The ink transfer plate 310 may preferably be a metal plate or a resin film that can process a fine intaglio pattern.

  The ink transfer unit 300 is configured to transfer the ink in the intaglio pattern 311 onto the surface of the blanket roll 100, and one or more ink transfer plates 310 are fixed on the plate-like support base 300. Since the ink transfer plate 310 will transfer ink to the roll 100 in the future, it must be fixed at an accurate position for multicolor printing described later.

  As a first fixing method for fixing the ink transfer plate 310 on the support table, a vacuum pressure generated through a vacuum generation unit (not shown) is generated through the vacuum hole 335, and the ink transfer plate 310 made of a film material is mounted on the support table 330. It can be fixed so that it does not move. As a second fixing method, the ink transfer plate 310 is fixed on a support using a double-sided tape 336. As a third fixing method, it can be fixed by a clasp or a rotation fixing screw.

  FIG. 4 shows that the intaglio pattern on the ink transfer plate 310 is filled with ink while the blade portion of the squeegee portion 230 moves in a second direction orthogonal to the first direction in which the roll 100 moves.

  However, in FIG. 4, the blade of the squeegee unit 230 is shown to be orthogonal to the movement direction (first direction (x)) of the blanket roll 100, but is not orthogonal, but a predetermined angle (ie, an angle other than 180 degrees (ie May have non-parallel angles)).

  The ink transfer plate 310 has an intaglio pattern 311 formed thereon. As a method for forming an intaglio pattern on a resin film, there is an imprint method that is already widely known. This is a known technique, and thus detailed description thereof is omitted.

  The blade of the squeegee section 230 is filled with the ink in the fine intaglio pattern 311 while pushing the ink (I) in the second direction with one end in contact with the ink transfer plate 310, like a doctor blade having one end in a straight shape. To play a role. FIG. 5 is a view showing a state in which the ink (I) fills the fine intaglio pattern 311. Thus, the ink (I) is filled only in the fine intaglio pattern 311, and then the ink is based on intermolecular force and hydrodynamic motion while moving and rotating in the first direction with the roll 100 in contact with the ink. It is pulled up by force and transferred onto the surface of the roll (FIG. 6).

  In a preferred embodiment of the present invention, the blade corresponds to the shape of the protrusions or recesses 331, 332, 333 of the support base 330 formed to prevent color mixing between the inks. The shape of the part may change.

  In FIG. 4, a total of four ink transfer plates 310 are provided. Each ink transfer plate 310 has the same width (L), and each ink transfer plate has a predetermined interval (Δ) from each other. As described above, since the supply width of the ink (I) is also L, when the blade moves in the second direction while pushing the ink, the ink flows into both sides and enters the ink transfer plate located adjacent to the ink. May be mixed with each other.

  In order to prevent this, the transfer plate support base 330 is provided with recesses 331, 333 or protrusions 332 extending in the second direction at the interval (Δ) to prevent ink from being mixed. .

  At this time, a part of the blade at one end thereof may have the shape of the protrusions or recesses 231 and 232 corresponding to the shape of the recess or protrusion. Of course, when the transfer plate support has the shape of the recesses 331 and 333, a part of the blade does not necessarily have the shape of the projection 231, but when the transfer plate support has the shape of the protrusion 332, the blade For smooth movement of the part, it is desirable that a part of the shape of one end of the blade part has a concave part 232 corresponding to the shape of the convex part 332 of the support base.

  As another preferred embodiment, an auxiliary roller or the like for properly wiping off excess ink may be installed after the ink is filled into the fine intaglio pattern through the blade portion. The auxiliary roller automatically wipes the ink attached to the blade part as necessary, and is set to wipe the ink of the blade part every predetermined number of times depending on the viscosity and amount of ink used. can do.

  Still another embodiment of the squeegee blade portion according to the present invention will be described with reference to FIGS.

  As shown in FIG. 7, the squeegee blade part of the ink supply part 200 has two second blades having a predetermined angle (a + b) with each other and being obliquely arranged around the blade rotating part 260. A single blade 230a and a second blade 230b can be used (hereinafter, this embodiment is referred to as a double blade). In this case, the ink syringe 210 is also composed of a first ink syringe 210a disposed on the first blade side around the blade rotating unit 260 and a second ink syringe 210b disposed on the second blade side. This is a configuration in which ink supply and squeegee work can be performed even when the ink supply unit 200 moves the ink in the second direction and then returns to the original position.

  The operation of the double blade will be described below with reference to FIG.

  FIG. 8A is an end surface of bb ′ of the ink supply unit 200 of FIG. 7 when the ink is supplied for the first time before the roll 100 still enters the transfer unit. The first ink syringe 210 a supplies ink to the transfer unit and moves in the second direction while one end of the second blade 230 b is in contact with the transfer plate 310. At this time, the second ink syringe 210b does not supply ink. The blade rotation unit 260 rotates so that one end of the second blade is in contact with the transfer plate 310, and the second blade has a predetermined angle (b) with respect to the vertical axis with the blade rotation unit as a center. At this time, the first blade 230a has an angle (a) larger than the angle (b) of the second blade 230b with respect to the vertical axis centering on the blade rotating portion so that one end does not contact the transfer portion (a > b).

  FIG. 8B is a diagram illustrating the ink supply and the squeegee operation while the ink supply unit 200 returns to the original position after the first ink supply is completed and the roll 100 has already passed through the transfer unit. Contrary to the case of FIG. 8 a, the second ink syringe 210 b supplies ink to the transfer unit, and moves in the direction opposite to the second direction while one end of the first blade 230 a is in contact with the transfer plate 310. At this time, while the second blade 230b does not contact one end of the transfer portion, the blade rotation portion rotates so that one end of the first blade 230a contacts the transfer portion.

  According to the double blade configuration shown in FIGS. 7 and 8, since the ink can be further supplied for the next ink transfer simultaneously with returning to the original position after the first ink supply is completed, the ink supply Increases work efficiency and economy.

  In particular, this greatly increases the economic efficiency based on the workability and shortening of the printing because printing on the printing material and ink supply and squeegee work can be performed independently.

  In addition, the blades can be wiped independently during printing on the substrate with waste, wiper or kimwipe placed outside the roll path in the second direction, if necessary, without printing time loss. It can also be used for beautiful printing.

  Further, as the movement range of the ink supply unit 200, the start ink line linearly supplied on the transfer plate from the ink supply start point to the end point does not enter the roll movement range when moving in the first direction of the roll. To. That is, as a whole, the ink supply unit 200 moving in the second direction supplies ink onto the transfer plate, and then performs the squeegee operation with the blade while moving in the second direction.

  Also, here, when the blade leaves the ink at the end of the squeegee operation, the blade transfer plate and the ink molecules each have an intermolecular force. Due to the force, it is divided into transfer plates and blades, resulting in residual ink lines. As with the start ink line, the position of the last blade of the squeegee (the position of the remaining ink line) must not enter the range of movement of the roll in the first direction. Therefore, the movement distance of the blade in the second direction must be moved beyond the length of the roll in the second direction so as not to enter the movement range of the roll.

  Thereafter, the roll moves while transferring the ink from the transfer plate while preventing the start ink line and the residual ink line from entering the moving range in the first direction.

  In the subsequent operation, the roll leaves the transfer area and enters the printing area, so that the squeegee section and the ink supply section can each move independently. The operation of supplying ink to the ink becomes possible.

  In order to reduce the residual ink lines, as described above, blade and squeegee operations that move in the reverse direction of the second direction are additionally performed to maintain printing quality, protect the roll, and economically supply ink. Can be increased.

  FIG. 9 is a diagram illustrating the overall configuration in which the roll 100 receives ink transfer from the ink transfer plate 310 while moving in the first direction.

  In FIG. 9, the ink on the ink transfer part 310 has a width of L and a space (Δ) therebetween. As described above, the ink is transferred from the transfer plate 310 to the roll 100 by the upward force based on the intermolecular force between the ink and the roll 100 and the fluid dynamics (fluid equation).

  Based on this, the radius (r) of the roll 100 shown in FIG. 9 is greater than or equal to [N (L + Δ) + δ] / (2π). In the embodiment of the present specification, for convenience of explanation, the radius (r) of the roll will be described below as being the same as [N (L + Δ) + δ] / (2π).

  Here, N means the number of colors used at the time of printing, and the number of colors when the print shape is different even in a single color in a three-dimensional printed product (for example, the same color is overprinted again by rotating in the θ direction). Alternatively, N can be said to be the number of transfer plates. As an example, in the embodiment of FIGS. 1 to 4 of the present invention, N is 4 because different color ink portions (I1, I2, I3, I4) = 4) are used. If the three-dimensional printed material is rotated in the θ direction as will be described later, the same color is printed once more, so N = 4 × 2 = 8. However, here, for simplification of description, the entire rotation will be described once assuming that θ rotation is omitted and N = 4.

  As described above, L is the width of the ink applied on the transfer plate, and in order to simplify the formula, it is rotated in the θ direction as described above, and is assumed to be the same when printing in different directions. Further, Δ is an interval between transfer plates (inks) for preventing ink color mixing. At this time, δ means a minute correction amount that depends on the pressure of the roll, etc., based on the change in the length of the radius generated by the elastic roller coming into contact with the transfer plate and the printed matter (creating a nip (Nip)). To do. If the nip does not occur in the limit (δ = 0), the length of the outer periphery of the roll 100 is the length in the first direction of a predetermined interval between each ink transfer plate and each ink transfer plate. It becomes the length which added the length or more.

When generalizing the length of the outer periphery of the blanket roll 100, the following mathematical formula is obtained.

Here, L _i means the length of the i-th transfer plate in the first direction, and Δ _j means the length of the interval between the plates in the first direction following the j-th transfer plate.

  In FIG. 9, since the sizes of the respective ink transfer plates 310 are the same, the same printing position points (X1, X2, X3, X4) on the respective ink transfer plates are mutually L in the first direction (x). + Δ apart. This is so that, in the printing stage described later, printing can be performed while the respective inks transferred from the points (X1, X2, X3, X4) overlap with the same point on the printed matter.

  As shown in the lower end of FIG. 9, the ink on the transfer plate 310 is transferred onto the roll as the roll 100 moves in the first direction while rotating once, and then the printing operation for the printed material starts. That is, the roll 100 rotates once and moves in the first direction, and at the same time, the ink on one or more transfer plates is transferred to the surface of the blanket roll.

  FIG. 10 illustrates the printing unit 400, and a three-dimensional printed material 410 having a thickness is illustrated as a printed material. However, the present invention is not limited to this, and can be applied to all flat printed materials or cylindrical printed materials.

  The printing unit 400 is positioned on the front surface in the moving direction (first direction) of the roll 100 to which the ink is transferred through the transfer unit 300 and between the pair of guide rails. In FIG. 10, the printing unit 400 includes a plate-shaped printed material support table 420, and a three-dimensional printed material 410 is fixed on the printed material support table.

  As a method for fixing the printed material 410, when the printed material is a flat surface, a vacuum pressure, a double-sided tape, a jig such as a clasp, or the like can be used as in the transfer plate described above. However, when the printed material 410 is a three-dimensional printed material, it is preferable to provide a separate fixing member 430 in order to fix the three-dimensional printed material on the support base 420. In order to print a large amount of printed matter, it is necessary that the printed matter can be easily attached to and detached from the support base and the position thereof is firmly fixed during printing. According to a preferred embodiment, the fixing member 430 is an organic material mold such as plastic manufactured by a 3D printer having a shape corresponding to the inner surface of the printed material. When a fixing member is manufactured by a 3D printer, it is preferable because a fixing member optimized for printed materials having various shapes can be easily generated.

  Another important feature of this machine is the ability to color print and color the 3D object itself created with a 3D printer.

  FIG. 11 is a view showing a state in which the printed material support table 420 is tilted up and down with respect to the first direction.

  Through the rotating means (for example, a motor) 460 provided on both sides or one side of the printed material support table 420, the printed material support table 420 may be inclined up and down with respect to the first direction at a predetermined angle (φ). Yes (hereinafter referred to as vertical rotation of printed matter). Such a configuration is very effective particularly when the printed matter is a three-dimensional printed matter having a thickness (see FIGS. 11 and 16). That is, in general, when the printed material is placed in a horizontal state, the portions 410a and 410b that cannot be printed due to the thickness (height) of the printed material can be effectively printed by tilting the printed material.

  FIG. 16 illustrates that the printed material support table 420 is tilted up and down at a predetermined angle (φ) with respect to the first direction, and the roll 100 moves in the first direction while rotating without vertical movement. ing. As described above, in the case of a three-dimensional printed material, it is possible to print even on the portions 410a and 410b that are difficult to print through the feature that the printed material support base 420 is inclined.

  However, since the contact point between the printed material and the roll differs depending on the degree of inclination of the printed material, the printed material must be tilted while maintaining an optimum printing distance. In FIG. 16, it can be seen that, for this reason, the printing unit height adjustment unit 450 maintains the optimum printing distance while vertically moving in accordance with the degree of inclination of the printed matter.

  The printing unit includes a printing unit height adjustment unit 450 at the lower end, and can adjust the vertical height of the printed material support table 420. Further, the printing unit includes a separate guide rail so that the printed material support base 420 can move in the first direction separately from the guide rail. The printing unit support 420 may move independently in the vertical direction through the printing unit height adjustment unit 450 and in the horizontal direction through the guide rail.

  In FIG. 12, the printed material 410 on the printed material support table 420 is rotated at a predetermined angle (θ) on the support table 420 around the third direction (z axis) (hereinafter referred to as horizontal rotation of the printed material). It is shown that. As will be described later, when the printed material is a three-dimensional printed material, the portion of the side surface rising in the z-axis direction near the vertical or a more obtuse angle of the printed material that is not printed well only by the roll 100 printing in the first direction. This is for printing. Although it is preferable that the printed material support table 420 is provided with a rotating means for the horizontal rotation of the printed material, the printed material may be manually rotated without providing a separate horizontal rotating device.

  FIG. 13 is a view showing a form in which the roll prints the first ink (I1) on the printed matter. In FIG. 13, for the sake of convenience of explanation, a planographic print will be described as a reference. However, as will be described later, this also applies to a cylindrical print or a three-dimensional print. In order to simplify the drawing, the printed material support base and the printed material support height adjustment unit are omitted in FIG.

  In order to describe the printing method in FIG. 13, the following description will be made with reference to X1, X2, X3, and X4 described in FIG. 9. FIG. 13 is a series of start stages of the multicolor printing method of FIGS. 14 and 15 as will be described later. For convenience of explanation, the length of the three-dimensional object 410 in the first direction is the same as L + Δ, but may be smaller than L + Δ depending on the required printing area.

  FIG. 13 a shows a state immediately before the first ink portion (I 1) is printed on the planographic print 410 after the ink is transferred from the transfer unit 300 to the roll 100. The roll 100 moves in the first direction while rotating counterclockwise in FIG. In FIG. 13, T means a target position (Target Position) printed so that X1, X2, X3 and X4 overlap each other. In FIG. 13a, T is displayed as T0 because no ink has been printed yet. 13A is a diagram immediately before the ink on the roll X1 is printed on the substrate T0 by the roll 100 moving in the first direction while rotating. FIG. 13b shows the ink X1 (I1) immediately after printing at the position T0. In order to indicate that the ink has been printed, the ink circled in FIGS. 13a and 13b has moved from the roll to the substrate TX1. T0 is denoted as TX1 after T1 ink is printed.

  In order to print the second ink portion (I2), the roll 100 must move to the same position as the position corresponding to FIG. 13a with the rotation and movement in the first direction stopped. Hereinafter, FIG. 14 is a diagram illustrating that the printing unit (printed material) moves to the next printing position before printing the second ink portion (I2).

  FIG. 14a shows a state immediately after the first ink portion (I1) has been printed on the printed matter. As shown in FIG. 13, since the ink (X1) is printed at the print target point (T), TX1 is displayed. In this drawing, the roll 100 rotates 1/4 turn and horizontally moves in the first direction by 2πr / 4.

  FIG. 14b is a drawing showing that the printed material is vertically moved downward. The printed material immediately moves horizontally in the first direction with a linear slurder or the like, but at the same height z as the printing, the printed material rubs against the roll. For this purpose, the printing unit includes a printed product support height adjustment unit 450. The height adjustment unit 450 may use any known configuration that can move the printing unit up and down in the vertical direction through a driving unit such as a motor.

  FIG. 14C is a diagram illustrating that the printed material vertically moved downward is horizontally moved in the first direction. At this time, the distance moved horizontally is the same as the distance moved by rotating the roll 100 so that the second ink portion (I2) is printed so as to overlap the same position as the first ink portion (I1). 2πr / 4, that is, (L + Δ) + δ / 4 = L + Δ + ε (ε = δ / 4). Here, δ means the amount of change caused by the minute change in length generated by the elastic roller in contact with the transfer plate or printed matter as described above. ε is a value obtained by dividing the δ by 4 because the four ink portions (I1, I2, I3, and I4) correspond to ¼ of the roll 100 diameter.

  FIG. 14d shows that the printing unit moves vertically through the height adjustment unit 450 and is ready to print the second ink portion (I2).

  FIG. 15 shows the second ink portion (I2) after the second print preparation process shown in FIG. 14, that is, the vertically moved (FIGS. 14b and 14d) and the horizontally moved (FIG. 14c) printed portions. It is drawing which shows printing.

  In the second ink part (I2) printing method of FIG. 15, the difference from FIG. 13 is that the first ink part (I1) already performed in FIG. 13 is already printed on the printing unit. In FIG. 13, the target point where the ink (X1) is printed is indicated by TX1, and it can be seen that the roll 100 rotates 90 degrees counterclockwise as compared with FIG. However, although not shown in FIG. 15, the roll 100 is in the first direction by 2πr / 4, that is, (L + Δ) + δ / 4 = L + Δ + ε when the first ink portion of FIG. 13 is printed. It is in the state moved horizontally.

  In FIG. 14, the printed material is horizontally moved in the first direction by L + Δ + ε, so that the target point (TX1) where the ink (I1) is printed is moved in the first direction while the roll 100 is rotated in FIG. The ink (X2) of the second ink portion (I2) is printed at the target point (TX1). FIG. 15b is labeled TX1X2 to indicate that the two inks (X1 and X2) have been printed so as to overlap each other after such printing.

  After that, as shown in FIG. 14 again, the printed material is moved horizontally in the first direction by L + Δ + ε to print the third ink portion (I3) (TX1X2X3), and finally, the print is shifted by L + Δ + ε. The fourth ink portion (I4) is printed again (TX1X2X3X4) by moving horizontally again in one direction.

  As described above, assuming that the four ink parts are colors according to the CMYK hue table, combining any of the four inks (I1, I2, I3, I4) will produce a desired pattern in any hue (multicolor). It has the effect of being able to print. Above all, such multi-color printing is possible during one printing cycle (one rotation of the roll 100), so that the printing time can be saved and mass production can be achieved.

  Referring to FIG. 17, as still another embodiment of the printing unit 400 according to the present invention, when the printed material is small, a plurality of printed materials are provided in the printed material support unit in the first and second directions. It becomes possible to print at once.

  For example, when the length of the printed material 410 in the second direction is short, a plurality of printed materials can be arranged in parallel in the second direction orthogonal to the movement direction (first direction) of the roll 100. Alternatively, when the length of the printed material 410 in the first direction is short (L or less), or when the printed pattern is the same in all ink regions, a plurality of printed materials may be arranged in the first direction. However, in any case, the total length of all printed materials in the first direction must be L or less. Of course, when the size of the printed matter itself is very small compared to the one ink portion, it can be arranged in parallel in both the first direction and the second direction to further increase the productivity per printing cycle. .

However, the description of the printing method has been made first in a relatively simple manner. However, it is preferable to perform UV light irradiation for a short time after the printing of each color is completed. This prevents other inks from moving onto the other colors of the roll, and the solidification of the UV light is mostly due to the π ^* antibonding molecular orbitals, the electrons on the original low energy orbitals, This is a method that selectively gives photon energy and makes electron transitions, thereby increasing the probability of overlapping electron clouds and causing the reaction to solidify, so there is even an ink with organic matter that matches the frequency of the UV light. This is because it can be solidified in a very short time.

  FIG. 18 illustrates a drying unit 600 that dries the ink printed on the printed matter.

  As described above, in the case of the present invention, since multiple colors or various kinds of inks are printed on the same printed matter in one printing cycle, the ink before being overprinted is dried for each color printing. There is a need. Of course, depending on the type of ink and the characteristics of the printed matter, it may be possible to dry all of the ink after the printing process is completed. For example, in the case where printing is performed once, θ rotation is performed with the same color and printing is performed again, of course, UV irradiation is not necessary in the meantime.

  First, the configuration of the drying unit varies depending on the properties of the ink, but in the case of the present invention, description will be made assuming that UV ink is used. Since UV ink can be dried quickly by simply irradiating the ink with ultraviolet rays according to the above principle, it is preferable for the present invention that aims at mass production by increasing the printing speed.

  As shown in FIG. 1, the drying unit 600 is located on the extension of the moving direction of the roll 100, that is, the first direction. However, the present invention is not limited to this, and according to the following embodiments, the roll 100 may be disposed in the direction opposite to the first direction. As a preferred embodiment, as described below, the drying unit 600 includes a fixed mold that is fixed at a fixed position and a movable type that moves by moving the printing unit 400.

  The drying unit 600 includes a UV irradiation unit 610 that irradiates UV light, and UV light between the UV irradiation unit 610 and the roll 100 so that the UV light is not irradiated to other positions in addition to the printed matter, and particularly the roll 100 is not irradiated. A UV blocking unit 620 for blocking Alternatively, the drying unit 600 may include a cooling unit 630 to prevent deterioration, deformation, and discoloration of the printed material due to heat generated by UV light.

  FIG. 19 is a diagram illustrating a fixed drying unit.

  19a and 19b show that the drying unit 600 is disposed on the extended line side of the roll 100 in the first direction in FIGS. 14a and 14b. As shown in FIG. 14, the printing unit 400 vertically moves the printed matter on which the first ink portion (I1) is printed through the printing unit support base height adjustment unit 450. After that, in FIG. 14, the second ink portion (I2) immediately moves to the position for printing (horizontal movement by L + Δ + ε in the first direction, see FIG. 14c). And move horizontally to the first direction position where the drying section is located. Thereafter, the drying unit 600 irradiates the printed material with UV by the UV irradiation unit 610 and selectively performs a cooling operation with the cooling unit 630 for cooling. A UV blocking unit 610 is disposed between the UV irradiation unit 610 and the roll 100 so that UV is not irradiated to the ink (I2, I3, I4, especially I2 and I3) on the roll 100 that has not been printed on the printed material at the time of UV irradiation. Is done. Thereafter, the printing section that has been dried in a short time moves horizontally to the same position as in FIG. 14c (L + Δ + ε in the first direction from the position where the first ink portion is printed) (FIGS. 19d and 19e). ).

  In this way, if short-time UV irradiation is performed for the number of times corresponding to the number of colors, continuous printing is completed within one rotation of the roll.

  However, as shown in FIG. 19, when the fixed drying unit is used, the distance that the printing unit horizontally moves is increased for each ink printing, and as a result, the printing time is increased by about 4πr / V at the maximum. (V is the moving average speed, r is the radius of the roll).

  FIG. 20 is a view illustrating a movable drying unit that moves in the first direction together with the roll 100.

  In FIG. 20, the drying unit 600 is arranged in the direction opposite to the first direction with respect to the roll 100, unlike the stationary drying unit of FIG. 19. However, after the ink is transferred from the transfer unit 300 to the roll, the movement of the roll 100 should not be disturbed when the first ink portion (I1) is printed, so it is higher than the roll diameter (2r) in the vertical direction. It is preferable that it can move up and down in the (z direction). However, the present invention is not limited to this, and it may be configured such that the roll 100 moves together after the roll 100 even when transfer is performed on the transfer portion of the roll 100. However, in any case, after the printing of the first ink portion (I1) is completed, it moves in the first direction together with the roll 100 after the roll 100.

  In the case of the mobile drying unit 600 shown in FIG. 20, the printed material that has been printed in the first direction together with the roll 100 can be dried immediately after printing without moving separately. Therefore, there is an advantage that the printing speed is faster than that of the stationary drying unit of FIG.

  Also in the mobile drying unit 600, a UV blocking unit 620 for preventing UV irradiation on the roll 100 is disposed between the UV irradiation unit 610 and the roll 100.

  Hereinafter, in the multicolor gravure offset printing apparatus according to the present invention, specific examples will be described for each of the three types of printed matter.

  First, as a first embodiment, a case where the printed material is a flat printed material will be described.

  Four colors are applied to the transfer plate 310 installed in the transfer unit 300, and the roll 100 transfers ink to the roll while rotating and horizontally moving in the first direction. As in the previous embodiment, the length of each of the ink portions (I1, I2, I3, I4) is L, and the roll has an interval of Δ from each other. Thereafter, the roll 100 moves horizontally to the printing unit 400 while rotating in the first direction. Hereinafter, the printed material will be described assuming a flat printed material such as a solar cell. Here, the plane is not a plane that has no change in the height of the plane, but is the extent that the change in the height of the printed material does not affect printing (assuming about 1 mm or less), and the height change over the entire plane. A shape close to a flat surface with almost no Examples are paper and semiconductor surfaces including solar cells.

  The roll 100 approaches the printed material 400 fixed to the printed material supporting plate while being placed on the slider of the first guide rail using a linear actuator or the like. At this time, in the case of a lithographic printing product, it can be fixed through a double-sided tape, vacuum, a clasp, or a jig such as a fixing device as in the transfer plate fixing method described above. After that, printing is performed by horizontally moving in the first direction while rotating while the roll is in contact with the printed material positioned on the front surface.

  After that, when the predetermined position (X1) of the first printing portion (I1) is printed on the printed matter and the printing of the first printing portion (I1) is completed (TX1), the rotation and horizontal movement of the roll 100 are stopped. In this state, the printed material moves downward through the printed material support height adjustment unit 450 and then horizontally moves (and moves upward again) in the first direction by L + Δ + ε. Suppose that ε is 0 in the case of a weak pressure that does not generate a nip (Nip) of the roll 100 on the flat printed material and the ink plate. Thereafter, the roll 100 continues to rotate and move horizontally to print the second print portion (I2). At this time, since the printed matter is moved by L + Δ + ε in the first direction, printing is performed so that the predetermined position (X2) of the second printed portion (I2) is superimposed on the ink (X1) ( TX1X2). In this way, the four printed portions (I1, I2, I3, I4) are superimposed on the four layers, so that multicolor printing is possible.

  As a second embodiment, a case where the printed matter is a cylindrical printed matter will be described with reference to FIG. However, since the part from which the roll 100 transfers the ink from the transfer plate is the same as that in the first embodiment, the description is omitted. For example, this includes a bottle such as a cosmetic bottle or a cylindrical surface whose surface is deformed.

  The difference from the first embodiment is that the cylindrical printed material is raised in the lateral direction, and the cylindrical printed material is provided with the rotating means 460 at either one or both of the two ends. This is that the direction (cylindrical longitudinal direction) can be rotated 360 degrees. At this time, the rotation direction of the printed material is opposite to the rotation direction of the roll 100. That is, if the roll 100 rotates counterclockwise in the embodiment, the cylindrical printed material rotates in the clockwise direction (reverse rotation). At this time, the rotation of the cylindrical printed product must be controlled at a constant speed in synchronization with the rotation of the roll 100 so that the portion of the cylindrical printed product in contact with the roll does not slip. Further, the rotating means installed at both ends of the cylindrical shape includes a fixture so that the printed matter does not slip.

  Thereafter, the printing method of the first ink portion (I1) is the same as that of the first embodiment except that the printed matter is cylindrical and rotates with the roll. That is, in the second embodiment, the length of the printed material means the circumference of the cylinder.

  Thereafter, as in the first embodiment, after the roll 100 is stopped and the cylindrical printed material is vertically moved downward, it is moved horizontally and vertically to the printing position of the second ink portion (I2), and the second printed portion is moved to the second position. Finish preparing the ink part for printing. Thereafter, the roll 100 is rotated and moved horizontally again to return to the same position as the position where the first ink is printed (TX1), and the second ink is printed with the phase of the rotation angle φ of the printed matter being aligned ( TX1X2).

  Hereinafter, still another embodiment of the cylindrical printed matter will be described with reference to FIG.

  In the case of the second embodiment described above, the cylindrical print must move horizontally by L + Δ + ε and move upward again to print the second print portion. There is a problem that the printing time is increased by about 4πr / V at the maximum by the time required for the printed material to move (V is the moving average speed, and r is the radius of the roll). Also, it takes a long time to return to the point where the drying unit 600 is located for drying.

  However, in the case of a cylindrical printed matter, unlike the flat printed matter of the first embodiment and the three-dimensional printed matter of the third embodiment, the cylindrical printed matter is rotated while moving with the movement of the roll 100 while being in contact with the roll 100. Multicolor printing can be performed. That is, in other embodiments, the printed material does not move horizontally while being printed, but in the case of a cylindrical printed material, by moving in the first direction at the same speed as the horizontal movement of the roll 100 while printing is performed, The feature that the horizontal movement of the printed matter is unnecessary including the purpose of drying as described above (described later) can be noted as an efficient printing method including printing drying.

  FIG. 22a shows a state of printing of the first ink portion (I1) in a state in which the cylindrical printed material 410 is in contact with a position directly below the roll 100 to which the ink has been transferred. Similar to the flat printed material, the roll 100 moves in the first direction while rotating, and in synchronization with this, the cylindrical printed material moves in the direction opposite to the roll 100 and simultaneously moves horizontally at the same speed as the moving speed of the roll 100 in the first direction. However, the first printed portion (I1) is printed on the cylindrical printed material (FIG. 22b). In addition, the speed said here is a relative speed of the surface which a plane contacts, and is not an angular speed of a roll and a bottle. In FIG. 22, the circumference of the cylindrical printed material is 1/4 of the circumference of the roll 100. Therefore, when the roll 100 is rotated 1/4 turn, the cylindrical printed material is rotated once and the same state as in FIG. Is moved by L + Δ + ε) (see FIG. 22c). In FIG. 22c, the first print portion (I1) is printed as TX1 at the target print point (T) as in the first embodiment. After that, when the second printed portion (I2) is printed together with the rotation and horizontal movement of the roll 100 in the same manner as the printing of the first printing portion, the cylindrical print 410 also performs the second printing while performing the reverse rotation and horizontal movement. The part is printed. As a result, the second printed portion is printed in the same position as the first printed portion is printed, so that the ink (X2) is printed so as to overlap the target point (TX1) to become TX1TX2.

  Referring to FIG. 23, in this case, the drying unit 600 is located on the lower end of the cylindrical printed material or the diagonal line of the front surface in the first direction, and moves in the first direction along with the horizontal movement of the roll 100 and the cylindrical printed material. At this time, as in the first embodiment, the UV blocking unit is positioned between the UV irradiation unit and the roll 100 to block and block the UV from being applied to the ink transferred to the roll.

  As described above, when the cylindrical printed material and the drying unit move in the first direction together with the roll, unnecessary operations such as moving the cylindrical printed material in the horizontal direction can be reduced as in the first embodiment, and a separate drying unit is provided. There is also no need to move to, and it has the effect of performing multicolor printing and proceeding rapidly to drying.

  In addition, what is important is that the UV ink is dried during printing, particularly when irradiating from the right oblique side of FIG. 23, so that the printing efficiency is remarkably increased, contributing to a reduction in the printing time and improving the economic efficiency.

  As a third embodiment, a case where the printed material is a three-dimensional printed material having various thicknesses on the z axis will be described. However, since it is basically the same as the first and second embodiments, the same contents are omitted.

  In the third embodiment, the three-dimensional printed material is the printed material 410 illustrated in FIGS. 10 to 12. Referring to FIG. 10, among the shapes of the printed material 410, the z direction, that is, the surface perpendicular to the paper surface, is displayed as surfaces 410 a, 410 b, 410 c, and 410 d that rise perpendicular to the z direction, which is difficult to print in the drawing. As described above, even if the elasticity of the roll 100 is large, printing is not easy when the printed matter is placed on a plane as it is. In other words, the roll 100 can cover a certain thickness (height) as the JIS-A hardness is closer to 0. However, if the hardness is too low, the roll is not exposed to vertical pressure during printing due to such a surface. An oblique horizontal component force is generated based on the elasticity of the roll, and the roll spreads locally. As a result, the printing is crushed or the life of the roller is shortened.

  Therefore, in FIG. 11 and FIG. 16, in order to effectively perform printing on the surfaces 410a and 410b in the first direction with reference to the direction in which the first printed material is placed among such difficult printing surfaces, the rotating means is used. It has been described that the printed material is rotated so as to have a predetermined angle (φ) with respect to the first direction.

  However, even with the method illustrated in FIGS. 11 and 16, it may be difficult for the roller traveling in the first direction to print on the difficult-to-print surfaces 410c and 410d. Therefore, in this case, as shown in FIG. 12, it is necessary to rotate each printed matter by a predetermined angle (θ) about the z axis. In this embodiment, the predetermined angle (θ) is 90 degrees, but other angles may be used as necessary.

  Hereinafter, a printing process for a three-dimensional printed material including such a process will be described.

  First, the transfer of ink from the transfer unit 300 to the roll 100 is basically the same, but unlike the conventional embodiment, the printed matter rotates at a predetermined angle (θ, 90 degrees) about the z axis. Therefore, it is necessary to use the same ink twice. That is, in order to use four colors for the printed matter, in this third embodiment, two (I, I ′) must be applied to each of the eight transfer plates, one per ink type (I). Thereafter, the transfer is performed on the eight transfer plates by the roll 100. Or you may engrave two patterns on four transfer plates. In the following, for ease of explanation, eight transfer plates are described.

  The roll approaches the printed material and the first printing (I1) of the first ink portion is performed. The subsequent process is the same as in FIG. 14, and after the printing plate support table height adjustment unit 450 is lowered vertically, the printed material horizontally moves in the first direction by L + Δ + ε and again moves vertically to perform the next printing. prepare. At this time, the printed matter rotates by a predetermined angle (θ, 90 degrees) about the z axis. Thereafter, the second printing (I1 ′) of the first ink portion is performed.

  After printing one kind of ink on the printed material through such a process, the same ink is rotated 90 degrees horizontally and printed again, so that it is possible to easily print on the aforementioned difficult-to-print surfaces 410c and 410d. .

  What is important here is that the printing of the same color does not require a drying process of applying UV light or the like until the printing of the same color is completed.

  After that, for printing the second ink, the printed material is moved by L + Δ + ε in the first direction and rotated by a predetermined angle (θ, 90 degrees) around the z axis, or the pattern of the plate is printed. Contrary to the order of the first color, printing of the second ink is started at the current angle θ, and the first printing (I2) of the second ink portion is performed to save the printing time. Thereafter, like the first ink portion, the printed matter moves by L + Δ + ε in the first direction and rotates by a predetermined angle (θ, 90 degrees) about the z axis, and then the second ink portion. The second printing (I2 ') is performed. In the same manner, multicolor printing is applied to the entire surface of the three-dimensional object, and the drying process is performed only in one rotation of the roll.

  Since this printing method can be performed with one roll rotation, if there is no problem with the parallelism of the linear slider in the roll movement direction or control software, the main printing can be performed with high accuracy and high reproducibility. It becomes possible.

Claims (16)

A bracket roll having ink transferred to the surface and horizontally moving in the first direction while rotating;
A printed matter positioned in front of the blanket roll in a first direction,
The gravure offset printing apparatus, wherein the printed matter moves in the first direction by a predetermined length.   2. The gravure offset printing apparatus according to claim 1, wherein two or more ink portions are transferred to the surface of the blanket roll.   The gravure offset printing apparatus according to claim 2, wherein the two or more ink portions have a predetermined interval (Δ) between the respective ink portions.   The blanket roll rotates in a length (L + Δ) obtained by adding the length (L) of the first ink portion and the predetermined interval (Δ) while the lower end is in contact with the printed matter. The gravure offset printing apparatus according to claim 3, wherein the first ink portion is printed by moving in the direction.   After the first ink portion is printed, the printed matter moves in the first direction by a length (L + Δ) obtained by adding the length of the first ink portion and the length of the predetermined interval. The gravure offset printing apparatus according to claim 4.   The printed matter has a value (ε) obtained by dividing the correction amount (δ) due to the change in the length of the radius (nip (Nip)) generated by the elastic blanket roller in contact with the printed matter, into the number of ink portions (ε). The gravure offset printing apparatus according to claim 5, further moving in a first direction (L + Δ + ε).   The gravure offset printing apparatus according to claim 5 or 6, wherein the blanket roll does not rotate and move horizontally in the first direction while the printed matter moves in the first direction.   The gravure offset printing apparatus according to claim 5 or 6, wherein the printed matter vertically moves downward before horizontally moving in the first direction and vertically moves after horizontally moving.   The gravure offset printing apparatus according to claim 1, wherein the printed matter has a predetermined angle (φ) with respect to the first direction and is inclined up and down.   The gravure offset printing apparatus according to claim 1 or 9, wherein the printed matter rotates at a predetermined angle (θ) about the third direction. The ink is a UV curable ink;
The gravure offset printing apparatus according to claim 1, further comprising a drying unit including a UV light irradiation unit that irradiates UV light.   The gravure offset printing apparatus according to claim 11, wherein the drying unit includes a UV light blocking unit positioned between the UV light irradiation unit and the blanket roll. Providing a blanket roll having two or more ink parts transferred to the surface;
Printing the printed matter while the blanket roll is rotated by a predetermined length and horizontally moved in the first direction with the lower end in contact with the printed matter;
A gravure offset printing method including a step of moving a printed material in a first direction by a predetermined length of the horizontal movement of the blanket roll in a state where the rotation and horizontal movement of the blanket roll are stopped. The two or more ink portions have a predetermined interval (Δ) between each ink portion,
The predetermined length that the blanket roll and the printed material move in the first direction is a length (L + Δ) obtained by adding the length (L) of the first ink portion and the predetermined interval (Δ). The gravure offset printing method according to claim 13, wherein the gravure offset printing method is provided.   The printed matter has a value (ε) obtained by dividing the correction amount (δ) due to the change in the length of the radius (nip (Nip)) generated by the elastic blanket roller in contact with the printed matter, into the number of ink portions (ε). The gravure offset printing method according to claim 14, further comprising a step of moving in a first direction (L + Δ + ε). Moving the printed matter vertically downward before horizontally moving in the first direction;
The gravure offset printing method according to claim 15, further comprising: moving the printed material horizontally in the first direction and then vertically moving the printed material upward.