EP1836104B1 - Pressurised dispenser for discharging a multi-component substance contained therein - Google Patents

Abstract

An inner sleeve (08) and a tappet (12), which is disposed therein, are arranged in a coaxial manner in relation to the container (02) of the pressurised dispenser (Ol). The tappet (12) extends through the base (06) to the transition point (15) where it is sealed and maintained in a rotationally displaceable but not axially displaceable manner. The threaded nut part (19) is displaced in an axial manner when the tappet (02) is rotated such that it is removed from the inner sleeve (08) of the cover (11). An actuating handle (20) is placed in a coaxial manner therewith on the tappet (12), where it can be displaced axially between a safety position (21) and an actuating position (22), wherein it can be rotated freely in the safety position (21) and is actively connected thereto in a rotationally fixed manner in the actuating position (22). A safety gap (23) and a spacer (24), which can be removed therefrom, are disposed between the actuating handle (20) in the safety position (21) and the container (02) about the tappet (12). Said spacer comprises, preferably, a clamping part (31) which, when said spacer is arranged in the safety gap (23), sits in a firmly clamped manner on the tappet (12). Preferably, the actuating handle (20), which is arranged in the actuating position (22), is rotationally connected to the tappet (12) by means of a drive fit.

Description

Technical area

The present invention relates to a pressure cell for discharging multicomponent substance contained therein, in particular a multicomponent substance for forming a hardening layer when coating a substrate, according to the preamble of patent claim 1.

State of the art

A pressure cell of the type mentioned is partially made WO 85/00157 and partly also off WO02 / 076852 known. This known pressure box is formed as an elongated container with a dome arranged at a discharge end thereof and a bottom arranged at the other end thereof. On Dom is, coaxial with the container, arranged a valve for discharging the multi-component substance. Within the container and coaxially with the axis thereof is disposed an elongated inner sleeve which is secured at one end thereof to the bottom and sealed thereto, while the other end of the inner sleeve is exposed within the container and sealed by a cover which can be deflashed by the inner sleeve , Coaxially to the container, an elongate plunger is arranged, of which there is an inner-side longitudinal section within the inner sleeve and an outer-side longitudinal section outside the container. The plunger goes through the floor at a transition point between said lengths and is there on the one hand sealed against the ground and thus relative to the container, on the other hand on the ground and thus rotatable relative to the container but not axially displaceable.

In a state of the art publicly documented in brochures (for example, in brochures concerning pressurized cans for "Nano-Fix 200", available from Atheco AG, CH-7000 Chur, or for "Samicolor® Nanobois", available from Kälin & Co. AG , CH-8404 Winterthur), which has all the features of the preamble of claim 1, the plunger is provided at least on a part of its inner longitudinal portion with an external thread, with a corresponding internal thread of a bore of a relative to the inner sleeve slidably threaded nut part cooperates to axially displace the Gewindemutterteil upon rotation of the plunger and to remove the latter by the interaction with the latter of the inner sleeve, wherein an actuating handle for rotating the plunger is mounted coaxially on the outer side longitudinal portion of the plunger. When the cover is removed from the inner sleeve, a component of the substance contained in the inner sleeve can come into contact with a component of the substance contained in the container outside the inner sleeve, whereupon the two components mix with one another in the container and thereby the ready-to-use multicomponent substance ready for dispensing is provided to be applied to the substrate when opening the valve of the pressure cell. Thus, the rotation of the actuating handle relative to the container causes an "activation" of the pressure box in the sense that separately present components mix with each other during activation and thereby the ready-to-use multi-component substance is provided.

As is well known, however, the ready-to-use multicomponent substance in the container of the "activated" pressure cell is only stable for a limited time, its usability deteriorates over time. It is therefore a disadvantage of the aforementioned prior art that the unintentional or willful unauthorized "activation" of the pressure cell can neither be prevented, nor is recognizable at the pressure can - think, for example, playful manipulation of goods on the shelf of a department store.

The object of the invention is therefore to prevent a unintentional "activation" of the pressure cell in a pressure cell of the type mentioned and to make a wanton unauthorized "activation" on the pressure cell recognizable.

Presentation of the invention

To solve this problem, a pressure cell of the type mentioned is characterized according to the invention by the combination of the features specified in claim 1. Advantageous developments of the inventive pressure box are defined in the dependent claims.

In particular, in the inventive pressure box of the actuating handle on the plunger axially between a safety position and a Sliding actuating position. In the safety position, the actuating handle is located at an axial distance from the container, and it is freely rotatable on the plunger. In the actuated position, the actuating handle is in the immediate axial vicinity of the container, and it is rotatably connected to the plunger. Only in the safety position is thus between the operating handle and the container around the plunger around a securing gap. In the inventive pressure box also in the securing gap suitable spacer is provided. This spacer is insertable into the securing gap to prevent displacement of the actuating handle on the plunger from the safety position to the actuation position. To release said shift from the securing gap, the spacer is removable from the securing gap.

From the foregoing it can be seen that the operating handle can not rotate the plunger when the spacer at the pressure box, i. in the safety gap: thus, thanks to the invention, an unintentional "activation" of the inventive pressure cell is prevented.

From the foregoing, it also appears that the spacer is no longer attached to the pressure box, i. in the safety gap is when the plunger was rotated by means of the actuating handle: thus, thanks to the invention, an "activation" made on the pressure box recognizable, regardless of whether it has taken place unconsciously, consciously or even wantonly and without authorization.

Preferably, the spacer comprises a clamp member which, when the spacer is in the securing gap, is seated clamped to the ram. As a result, the spacer is detachably attached to the plunger, i. attached to the pressure cell.

If the actuating handle has an axial wall profile which at least in places coincides in the radial direction at least with a wall profile of the container, but otherwise within the Wandungsprofils of the container and nowhere projecting radially from the wall profile of the container, then the spacer located in the securing gap on advantageous Way an axial wall profile, which in the radial viewing direction at least in places with the wall profile of the Container roughly matches. It follows that the spacer located in the securing gap is at least in places approximately flush with the container and the operating handle, which gives the pressure box advantageously a regular representational form, which confectioning example with labels and quite generally the supply of the pressure cell and in particular the installation of the pressure cell on the shelf of a department store easier.

Preferably, the spacer has a designed as a handle, tab or the like pull-out, which facilitates its removal from the securing gap, this pull-out may optionally formed as arranged on the spacer flexible tab and can be brought back by lightest stress in the wall profile of the container.

In a preferred embodiment of the actuating handle, this has around its axis radially arranged radial arms and indentations formed therebetween, in which the spacer located in the securing gap for the fingers of an operator can be reached. This allows the operator to easily remove it from the securing gap by pressing on the spacer. In addition, if it is ensured in a preferred manner that the wall profile of the spacer located in the securing gap nowhere protrudes radially from the wall profile of the container, so here too the pressure box advantageously has a regular representational form, which the packaging, for example, with labels and quite generally supplying the pressure cell and in particular the installation of the pressure cell on the shelf of a department store easier.

Preferably, the actuating handle located in the actuation position is rotatably connected to the plunger by press fitting, which allows a particularly favorable production. In addition, if it is ensured in a preferred manner that the operating handle by pushing it towards the container in overcoming the friction of the press-fit in the operating position is displaced, this also leads to a particularly simple operation of the pressure cell in their "activation": you need only the Press the bottom of the pressure box axially, if necessary by striking a suitable hard object.

In another preferred embodiment, the operating handle located in the operating position with the plunger by cooperation of at least one survey with a corresponding recess rotatably connected, elevation and depression are mutually arranged on the operating handle and plunger, for example, with the survey as inwardly projecting flattening in an axial bore on the operating handle and with the recess as milled flattening on the plunger. This training ensures the adhesion between the operating handle and the plunger during its rotation particularly well.

In addition, it can be ensured in a preferred manner that the displacement of the actuating handle from the safety position to the actuation position is irreversible: as a significant advantage is achieved in that it is not possible to reverse the recognizability of a willful unauthorized "activation" on the pressure cell. Advantageously, the irreversibility of the displacement of the actuating handle from the safety position to the actuating position is ensured by a press fit between the actuating handle and the plunger.

Brief description of the drawings

The invention will be described in more detail below with reference to the drawings, wherein corresponding parts in the drawings are designated by like reference numerals.

Fig. 2a und 2b

eine Ausbildung einer Aktivierungsvorrichtung als Teil einer erfindungsgemässen Druckdose bei abgebrochenen Behälter und mit dem Betätigungsgriff in einer Sicherheitsposition, in Fig. 2a im axialen Schnitt bzw. in Fig. 2b grösstenteils in Perspektivansicht und bei einem axialen Quadrant im axialen Schnitt;

Fig. 3

die gleiche Ausbildung einer Aktivierungsvorrichtung in der gleichen Darstellungsweise wie in Fig. 2a, jedoch hier mit dem Betätigungsgriff in einer Betätigungsposition;

Fig. 4a

und 4b eine Ausbildung eines Betätigungsgriffes, in Fig. 4a in Untersicht bzw. in Fig. 4b im axialen Schnitt;

Fig. 5a und 5b

eine Ausbildung eines Stössels, in zwei jeweils rechtwinklig zu dessen Längsachse und dabei rechtwinklig zueinander orientierten Ansichten;

Fig. 6

eine Perspektivansicht einer Ausbildung eines Abstandhalters als entfernbarer Teil einer erfindungsgemässen Druckdose;

Fig. 7

eine Perspektivansicht des auf der Druckdose montierten Abstandhalters gemäss Fig. 6, bei entferntem Behälter;

Fig. 8a und 8b

je eine Perspektivansicht, in verschiedene Richtungen, einer weiteren Ausbildung eines als entfernbarer Teil auf der Druckdose montierten Abstandhalters, bei entferntem Behälter;

Fig. 9

eine Perspektivansicht einer noch weiteren Ausbildung eines Abstandhalters als entfernbarer Teil einer Druckdose; und

Fig. 10

eine Perspektivansicht einer noch weiteren Ausbildung eines Abstandhalters als entfernbarer Teil einer Druckdose.

First shows Fig. 1 a pressure cell according to the prior art according to WO-85/00157 in axial section. Then show:

Fig. 2a and 2b

an embodiment of an activation device as part of an inventive pressure cell with broken container and with the operating handle in a safety position, in Fig. 2a in axial section or in Fig. 2b mostly in perspective view and with an axial quadrant in axial section;

Fig. 3

the same construction of an activation device in the same representation as in Fig. 2a but here with the operating handle in an operating position;

Fig. 4a

and FIG. 4b shows an embodiment of an operating handle, in FIG Fig. 4a in lower view or in Fig. 4b in axial section;

Fig. 5a and 5b

a design of a plunger, in two in each case at right angles to its longitudinal axis and thereby oriented at right angles to each other views;

Fig. 6

a perspective view of an embodiment of a spacer as a removable part of a pressure cell according to the invention;

Fig. 7

a perspective view of the mounted on the pressure cell spacer according Fig. 6 with the container removed;

Fig. 8a and 8b

each a perspective view, in different directions, a further embodiment of a removable part mounted on the pressure cell spacer, with the container removed;

Fig. 9

a perspective view of yet another embodiment of a spacer as a removable part of a pressure cell; and

Fig. 10

a perspective view of yet another embodiment of a spacer as a removable part of a pressure box.

Ways to carry out the invention

In the Fig. 1 illustrated pressure cell for dispensing therein contained multi-component substance according to the prior art according to WO-85/00157 is generally designated by the reference 01. The pressure cell 01 has an elongate tubular container 02, whose longitudinal axis is designated A. A discharge side end 03 of the container 02 is provided with a dome 04 disposed thereon. The other, bottom end 05 of the container 02 is provided with a bottom 06 arranged thereon. On Dom 04, coaxial with the container 02, a generally designated 07 valve is arranged, through which the substance contained in the pressure cell 01 can be applied. Within the container 02 and coaxially with an elongated tubular inner sleeve 08 is arranged. At its one, bottom axial end 09, the inner sleeve 08 is fixed to the bottom 06 and sealed against this. With its other, dome-axial End 10, the inner sleeve 08 is free within the container 02. The inner sleeve 08 is sealed at its dome-side end 10 by a cover 11, said cover 11 is absprengbar of the inner sleeve 08. Coaxial with the container 02, an elongated plunger 12 is arranged. An inside longitudinal portion 13 of the plunger 12 is located within the inner sleeve 08 and the container 02, and an outer longitudinal portion 14 of the plunger 12 is located outside of the inner sleeve 08 and the container 02. At a transition point 15 between its inner longitudinal portion 13 and its outer side longitudinal section 14, the plunger 12 passes through the bottom 06 of the container 02. At this transition point 15 of the plunger 12 relative to the bottom 06 and thus sealed relative to the container 02 and held axially displaceable on the bottom 06 and thus relative to the container 02.

Not in Fig. 1 , but in Fig. 2a and 2 B visible, is the initially mentioned, in brochures publicly documented prior art, according to which the plunger 12 is provided at least on a portion of its inner longitudinal portion 13 with an external thread 16, with a corresponding internal thread 17 a bore 18 of a relative to the inner sleeve 08 sliding threaded nut part 19 cooperates, so that upon rotation of the plunger 12, the threaded nut part 19 axially displaces, whereupon, in a suitable direction of rotation of the plunger 12, the threaded nut part 19 cooperates with the cover 11 to remove the cover 11 from the inner sleeve 08 (this interaction results in FIG present training example of itself from the integral-one-piece Anformung the threaded nut member 19 on the lid 11). For actuation, ie for rotation of the plunger 12, an actuating handle 20 is placed coaxially on the outside longitudinal section 14 of the plunger 12.

Shown is the actuating handle 20 on the plunger 12 in Fig. 2a and 2 B in a safety position 21, in Fig. 3 However, in an operating position 22. As can be seen, the operating handle 20 is in its operating position 22 in the immediate axial vicinity of the bottom end 05 of the container 02 (see Fig. 3 ), in its safety position 21, however, at an axial distance from the bottom end 05 of the container 02 (see Fig. 2a and 2 B ), which in this safety position 21 between the actuating handle 20 and the bottom end 05 of the container 02, around the plunger around, a Securing gap 23 forms, in which a matching spacer 24 is used, as in Fig. 2a and 2 B is shown.

When the operating handle 20 is in its safety position 21, but no spacer 24 is in the securing gap 23, the operating handle 20 on the plunger 12 can be moved axially from its safety position 21 to its actuating position 22. The insertion and insertion of a spacer 24 in the securing gap 23 thus prevents the displacement of the actuating handle 20 on the plunger 12 from the safety position 21 to the actuating position 22, while the removal of the inserted spacer 24 from the securing gap 23, the displacement of the actuating handle 20 on the plunger 12 of the Safety position 21 to the operating position 22 releases.

The actuating handle 20 is freely rotatable in its safety position 21 on the plunger 12. This is achieved by a corresponding design of the seat of the operating handle 20 on the plunger 12 in its safety position 21, for example according to an in Fig. 2a and 2 B illustrated training variant by the operating handle 20 is seated in its safety position 21 with clearance on the plunger 12.

By contrast, the operating handle 20 is rotatably connected in its operating position 22 with the plunger 12. This is achieved by a corresponding design of the seat of the actuating handle 20 on the plunger 12 in its operating position 22, for example according to an in Fig. 3 illustrated training variant by the operating handle 20 is seated in its operating position 22 with a press fit on the plunger 12.

According to another variant of the training or in addition to the above-mentioned training variant with press fit in the operating position 22 of the actuating handle 20 whose rotatable connection with the plunger 12 by the interaction of at least one elevation 25 rotatably connected to a corresponding recess 26, wherein elevation 25 and recess 26 alternately Operating handle 20 and plunger 12 are arranged. For example, in Fig. 3 on one half of the axial section and even better in the FIGS. 4a, 4b . 5a and 5b the elevation 25 as an inwardly projecting flattening within an axial bore 27 of the actuating handle 20 and the recess 26 as milled Flattening on the plunger 12 recognizable. However, it should be clear that an adhesion of equal quality between the operating handle 20 and the plunger 12 is ensured during its rotation when the elevation 25 on the plunger 12 and the recess 26 are mounted on the actuating handle 20, and even better, if in pairs Accordingly, more than just a survey such as 25 and a recess 26 are provided on each of the plunger 12 and the actuating handle 20.

It is advantageous to provide that the displacement of the actuating handle 20 on the plunger 12 from the safety position 21 to the actuation position 22 is irreversible in order to make the activation of the pressure cell permanently recognizable. A simple approach to this is to form the seat of the operating handle 20 on the plunger 12 as a press fit, so that the displacement of the actuating handle 20 to its operating position 22 take place only by firmly pressing the operating handle 20 to the container 02 in overcoming the friction of the interference fit can and the operating handle 20 could be withdrawn only by force in its safety position 21. In addition, the irreversibility of the displacement of the operating handle 20 is promoted from its safety position 21 to its actuation position 22 by the measure described below.

On the plunger 12, a groove 29 is provided in the vicinity of the end of its outer side longitudinal portion 14, which is an annular recess on the plunger 12 in the Fig. 5a and 5b designated and in the Fig. 2a . 2 B and 3 is recognizable. On the actuating handle 20 is a matching, substantially annular cam 28 is provided, which consists in the illustrated embodiment of four on the actuating handle 20 integrally molded ring segments which protrude in the axial bore 27 of the actuating handle 20 inwardly and in Fig. 4a all are recognizable while in Fig. 4b only two of them are recognizable. This division of the cam 28 in four ring segments gives this, with a corresponding design of the actuating handle 20 of sufficiently elastic material, a certain radial elasticity. In the safety position 21 of the actuating handle 20, the cam 28 is engaged in the groove 29. In order to move the operating handle 20 from the safety position 21 to the actuation position 22, the cam 28 must first be levered out of the groove 29 at the beginning of the displacement, which is possible thanks to the mentioned elasticity, but offers an axial resistance which then suddenly diminishes when the cam 28 leaves the groove 29. Thereupon, the axial force of the operator to overcome the mentioned axial resistance suddenly transfers to overcoming the friction of the interference fit in the displacement of the operating handle 20. In such circumstances, a fairly large friction of the press fit can be provided, which in fact the irreversibility of the displacement of the operating handle 20 ensures its safety position 21 to its actuation position 22. Again, it should be clear that the same result is achieved when, conversely, the cam on the plunger 12, for example, as an annular elevation and the groove on the operating handle 20 are mounted as a recess.

Especially out Fig. 3 , but also out Fig. 2a and 2 B It can be seen that the actuating handle 20 has an axial wall profile which coincides in the radial viewing direction at least in places with a wall profile of the container 02 approximately, but otherwise within the Wandungsprofils of the container 02 and nowhere protrudes radially from the wall profile of the container 02.

Preferably, as shown Fig. 2a and 2 B Recognizable, also located in the securing gap 23 spacers 24 an axial wall profile 30, which also, at least in places, in the radial viewing direction with the wall profile of the container 02 approximately matches, so that the present in the securing gap 23 spacers 24 at least in places with the container 02 and the operating handle 20 is approximately flush. It can be provided that the spacer 24, to facilitate its removal from the Sich.erungsspalt 23, designed as a handle, tab or the like pull-out, which may not, so that it does not protrude substantially from the wall profile of the container 02 radially, as on the spacer 24 arranged flexible tab may be formed, which is zurückbringbar by slightest stress in the wall profile of the container 02.

At an in Fig. 2a . 2 B . 6 and 7 illustrated preferred embodiment of a spacer 24, this is made in one piece of elastic material such as plastic, and it has a clamp member 31, which, when the spacer 24 as in Fig. 2a and 2 B shown in the securing gap 23 is seated clamped on the plunger 12.

As in Fig. 4a . 7 and 8a illustrated, the actuating handle 20 may have around its axis radially arranged radially arms 32 and recesses 33 formed therebetween. In these indentations 33 located in the securing gap 23 spacer 24 is accessible to the fingers of an operator. The operator allows this measure to act on the spacer 24 or press to remove the latter from the securing gap 23 or wegzudrücken without for this purpose the wall profile of the spacer used 24 would have to protrude radially from the wall profile of the container 02.

In Fig. 8a and 8b a butterfly-shaped configuration of the spacer 24 'is shown with a central annular socket 34 and two breakable wings 35 disposed thereon, the axial wall profiles of the container (not shown), the wings 35 of the spacer 24' (with wall profile 30 ') and the actuating handle 20 and its arms 32 approximately agree. In this embodiment it is provided that the spacer 24 'can be broken off at intended break points 36 thereof and on the actuating handle 20 past the plunger 12 and removed therefrom. To activate the pressure cell then the operating handle 20 is to push the plunger 12 until it engages in the operating position.

In Fig. 9 The wheel-shaped spacer 24 "is mounted on the plunger 12 between the bottom end of the container of the pressure cell and the operating handle, the axial wall profiles of the (not shown) container, the spacer 24" (with Wandungsprofil 30 ") and the actuating handle 20 and its arms 32 approximately match. In this embodiment it is provided that both the actuating handle 20 and the spacer 24 "are detachable from the plunger 12. To activate the pressure box, the actuating handle 20 and the spacer 24" are to be removed one after the other from the plunger 12, then the actuating handle 20 (now without the Spacer 24 ") again put on the plunger 12, and finally the operating handle 20 on the plunger 12 to push to the operating position 22.

In Fig. 10 is a pin-shaped configuration of the spacer 24 '' shown, in which an elongated body 37 of the spacer 24 '' at one end with a head 38 and at the other end with an elastic fork 39 is provided. The pin-shaped spacer 24 "'is inserted with its body 37 in a corresponding diametrical through-bore 40 of the plunger 12 and holds therein by means of the elastic fork 39, wherein the axial wall profiles of the container (not shown), the head 38 of the spacer 24"' ( With this design it is provided that to activate the pressure cell, the spacer 24 with the help of his serving as a handle head 38 from the plunger 12 to remove by pulling away and Thereafter, the actuating handle 20 on the plunger 12 is to be pressed until it engages in the actuation position 22. Optionally (in a variant, not shown) on the head 38 of the spacer 24 '"additionally designed as a handle, tab or the like pull-out, which the removal of the spacer 24 "'facilitates.

LIST OF REFERENCE NUMBERS

A

axis

01

Vacuum unit

02

container

03

tax end of 02

04

cathedral

05

bottom end of 02

06

ground

07

Valve

08

inner sleeve

09

bottom end of 08

10

dom-end of 08

11

Cover for 08

12

tappet

13

inside length section of 12

14

outside length section of 12

15

Transition point of 12

16

external thread

17

inner thread

18

drilling

19

Threaded nut part

20

operating handle

21

safety position

22

operating position

23

backup gap

24

spacer

25

survey

26

deepening

27

Bore in 20

28

cam

29

groove

30

Wall profile of 24

31

clamp part

32

Arm of 20

33

Indentation in 20

34

Version of 24

35

Wing of 24

36

Cracks of 24

37

Body of 24

38

Head of 24

39

Fork of 24

40

Through hole in 12th

Claims (11)

1. A pressure can for dispensing a multi-component substance contained therein, particularly a multi-component substance for generating a layer that hardens upon coating of a substrate, wherein
   the pressure can (01) is configured as an oblong container (02) with a longitudinal axis (A) and with a dome (04) arranged at a dispensing sided end (03) thereof and with a base (06) arranged at the other end (05) thereof,
   a valve (07) for dispensing the multi-component substance is arranged at the dome coaxially to the container,
   an inner sleeve (08) is arranged within the container and coaxially thereto, which inner sleeve is attached at an axial end (09) thereof to the base and sealed against the same, whereas the other axial end (10) of the inner sleeve is freely arranged within the container and is tightly closed by a cap (11) that can snap off from the inner sleeve,
   an oblong tappet (12) is arranged coaxially to the container, the oblong tappet having an inner elongate section (13) arranged within the inner sleeve and an outer elongate section (14) arranged outside of the container, the tappet passing through the base at a transition region (15) between said elongate sections and being sealed against the base and consequently against the container, and also being held rotatably but not axially displaceable at the base and consequently against the container,
   the tappet is provided at least at one portion of its inner elongate section with an outer thread (16) that cooperates with a corresponding inner thread (17) of a borehole (18) of a threaded nut portion (19) that is displaceable against the inner sleeve, in order to axially displace the threaded nut portion upon rotation of the tappet and to remove the cap from the inner sleeve by cooperation of the tappet with the cap, and
   an operating knob (20) for rotating the tappet is coaxially attached to the outer elongate section of the tappet,
   characterized in that
   the operating knob (20) is axially displaceable with respect to the tappet (12) between a secured position (21) and an operating position (22), wherein
   in the secured position (21) the operating knob (20) is freely rotatable with respect to the tappet (12) whereas in the operating position (22) it is coupled with the tappet (12) in rotationally locked manner,
   in the operating position (22) the operating knob (20) is arranged in close axial proximity of the container (02), whereas in the secured position (21) the operating knob (20) is arranged axially displaced from the container (02) so that between the operating knob (20) in the secured position (21) and the container (02) there is a safety gap (23) around the tappet (12), and
   a spacer (24) that fits into the safety gap (23) is provided that can be inserted into the safety gap (23) for preventing a displacement of the operating knob (20) at the tappet (12) from the secured position (21) to the operating position (22) and that can be removed from the safety gap (23) for enabling said displacement.
2. Pressure can according to claim 1, characterized in that the spacer (24) comprises a clamp portion (31) that is tightly clamped to the tappet (12) when the spacer is inserted into the safety gap (23)
3. Pressure can according to claim 2, characterized in that the operating knob (20) has an axial wall profile that, seen in radial direction, approximately matches at least in certain portions with a wall profile of the container (02), but otherwise lies within the wall profile of the container and does not radially protrude from the wall profile of the container anywhere, wherein the spacer (24) arranged in the safety gap (23) has an axial wall profile (30) that, seen in radial direction, approximately matches at least in certain portions with a wall profile of the container (02) so that the spacer (24) arranged in the safety gap (23) is approximately flush with the container (02) and the operating knob (20) at least in certain portions thereof.
4. Pressure can according to claim 3, characterized in that the operating knob (20) comprises radial arms (32) arranged in starlike manner around its axis (A) and recesses (33) formed therebetween (33) in which the spacer (24) arranged in the safety gap (23) is accessible for the fingers of an operating person, in order to enable the same to act on the spacer (24) so as to remove the same out of the safety gap (23).
5. Pressure can according to claim 4, characterized in that the wall profile (30) of the spacer (24) arranged in the safety gap does not radially protrude from the wall profile of the container (02) anywhere.
6. Pressure can according to claim 3, characterized in that the spacer (24) comprises an extraction aid configured as grip, strap or the like for facilitating the removal of the spacer out of the safety gap (23).
7. Pressure can according to claim 1, characterized in that the operating knob (20) arranged in the operating position (22) is coupled in rotationally locked manner with the tappet (12) by means of a press fit.
8. Pressure can according to claim 7, characterized in that the operating knob (20) upon being pressed onto towards the container (02) is displaceable to the operating position (22) while overcoming the friction of the press fit.
9. Pressure can according to claim 1, characterized in that the operating knob (20) arranged in the operating position (22) is coupled in rotationally locked manner with the tappet (12) by cooperating of at least one elevation (25) with a corresponding recess (26), wherein the elevation and the recess are alternatingly arranged at the operating knob and the tappet.
10. Pressure can according to any one of claims 7 to 9, characterized in that the displacement of the operating knob (20) from the secured position (21) to the operating position (22) is irreversible.
11. Pressure can according to claim 10, characterized in that the irrreversibility is achieved by means of press fit between the operating knob (20) and the tappet (12).

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