EP2743200A1 - Cartridge - Google Patents

Abstract

The cartridge (2) has a cylindrical housing that is provided with sealed piston on the inner wall. An outlet opening is provided with end caps enclosed in an accommodation space. A valve molded articles produced from an elastic synthetic material (22) is provided with valve flap. The outlet opening is sealed in a starting position. The valve portion is provided with a mounting flange for engaging the end cap. The valve flap is located within the valve ring. An annular portion is provided between valve flap and the valve ring.

Description

The present invention relates to a cartridge having a cylindrical housing which encloses a between a movably held in the cylindrical housing and against the inner wall of the cylindrical housing sealed piston and provided with an outlet end cap receiving space.

However, the present invention wants to further develop in particular a corresponding cartridge, as it comes as a sauce dispenser for ketchup, spice or the like used in the catering and can also serve as packaging of the contents for longer storage and / or transport. The cartridge as such is thereby clamped in a caulking gun and - as usual in building technology - conveyed by advancing a ratchet driven ram, which presses against the movable piston, in this case sets the recorded in the cartridge sauce under internal pressure, as a result, through the outlet opening Exits in portions.

The present invention is based on the problem to improve a cartridge of the type mentioned for the catering industry.

To solve this problem, the present invention proposes a cartridge having the features of claim 1. This is characterized by a valve body made of an elastic plastic, which has at least one valve flap, which closes the outlet opening in a starting position sealing. The valve body of the cartridge of the invention forms the outlet port, i. the opening for delivery of contents of the piston outwards. Due to the elastic properties of the plastic, the valve flap (s) tend to flex back into their original position, in which the valve flaps close the outlet opening.

The cartridge according to the invention is preferably one as in DE 100 06 288 A1 described cartridge. The disclosure content of this document is included in the disclosure of the present application documents with regard to the specific embodiment of the cartridge. In this case, usually ensures a mounting flange of the valve body a sealing and regularly the entry of oxygen preventing sealing, so that the food contained in the cartridge can be preserved in the cartridge for a long time.

Accordingly, the cylindrical housing of the cartridge according to the invention is preferably made of a relatively inexpensive to produce packaging material, for example, a thin rolled and longitudinally connected, for example, welded foil or cardboard. When using paperboard to make the cylindrical housing, it is usually coated on the inside to prevent direct contact of the liquid cartridge contents with the paperboard. The end cap is usually formed material identical to the cylindrical housing. Preferably, the cylindrical housing is formed together with the end cap as a unit made of cardboard, which is coated on both sides, in particular coated with a plastic. The end cap preferably has an edge extending in the axial direction of the cylindrical housing, which is surrounded by an inwardly turned end section of the cardboard material forming the cylindrical housing. The three-layer structure in the end cap formed by the free end of the cylindrical housing, the arcuate edge of the end cap and the embraced end portion of the cylindrical housing is usually intimately connected by crimping, so that at this transition from the end cap to the cylindrical housing a simple but effective conclusion is formed. Flanging can be done purely mechanically. Alternatively or additionally, the connection can be made by welding at least between the embossed section and the likewise plastic coated edge of the end cap in order to achieve a secure sealing of these layers.

The valve shaped body has at least one, preferably a plurality of valve flaps, which seal the outlet opening in a starting position in a sealing manner. In particular, the present invention seeks to provide a cartridge as a storage and dosing agent for foods having a relatively low viscosity. The filling amount is preferably between 0.5 and 3 liters, preferably between 0.6 and 1.5 liters, more preferably between 0.7 and 1 liter, which is an optimum between a sufficiently large packaging unit for the catering industry with due consideration of hygienic requirements and a food grade Storage also in the context of dosing out of liquid from the cartridge represents. Before the first metering the valve body is usually covered by a label, which on provided the outside of the end cap is usually releasably sealed and accordingly prevents any entry of air or contamination on the inlet side in any case before the first metering of cartridge contents, so that a hygienic storage of the cartridge contents is ensured for long-term storage in the cartridge.

The restoring force of the valve flap (s) into the starting position is brought about by adequate shaping of the valve shaped body and appropriate selection of the elasticity of the elastic plastic. In the starting position, the valve flap (s) usually abuts against boundary surfaces which are formed by the valve shaped body, preferably by other valve flaps. This ensures a high density. The tightness of the valve body according to the invention is such that also products with a viscosity of Bostwick of about 3 cm / 30 sec. can be stored at 20 ° C after the first dosing, without the cartridge contents dripping out of the outlet opening with a vertical cartridge. These viscosity values are to be understood at room temperature (20 ° C.). It is assumed that the product has a density of between 0.5 and 1.5, preferably of between 0.9 and 1.1 kg / dm ³ and the liquid column with a vertical cartridge over the outlet opening a height of between 150 and 250 mm. Also, the valve body should be designed such that in products with the above-mentioned viscosity does not escape unintentionally through the outlet even with shocks and strong shocks. A corresponding leakage of product from the cartridge is due to the material nature and construction of the valve body to be prevented even if the cartridge with the outlet opening remains down for several hours after a first removal in a rest position.

Further, due to its design, the valve body prevents liquid contents of the cartridge from draining the contents of the cartridge at a force of advancement on the caulking gun, typically below 60 to 80N. This feed force is calculated for a cartridge with a diameter of between 70 and 90 mm, preferably 80 mm and acts on the outside of the piston.

The valve body is preferably designed so that it is suitable for retrofitting existing cartridges. Thus, the valve body preferably has a mounting flange, which is usually provided on an inner wall of the end cap, but at least the position of the end cap that makes up the structural integrity of the cap. This may be a layer of cardboard or thin plastic film. The mounting flange is usually part of the unitary valve body and may be sealed with the material forming the end cap. In such a seal, the mounting flange may also be clamped between adjacent layers without having a tight cohesive contact with the layers. The layers are rather sealed together with the inclusion of the valve body. Such a seal may for example be formed between the plastic surface of the end cap on the inside thereof, which plastic surface is formed either by a plastic film or a plastic coating on a cardboard layer. Just as well, the valve body can be pressed with its mounting flange only due to the internal pressure against the inner surface of the end cap and thus the end cap be sealingly connected to the valve body.

The valve body according to the invention preferably has a valve body ring to which the valve flap (s) are fastened and which forms a base of the valve body which remains substantially undeformed when the valve flap is flexed from the initial position to an outwardly projecting dispensing position and provides the necessary return forces to allow the valve body to flex After valve removal, flex valve lugs back to their original position and close the outlet opening in a sealed manner. The valve body ring can also be formed by a radially inner region of the mounting flange.

All functional areas of the valve body are preferably formed as segments of a uniform valve body. In the present description, only a single valve body is used as part of the cartridge. It goes without saying that a plurality of such valve bodies can be provided on a single cartridge to improve product distribution.

The valve body according to the present invention is a three-dimensional structure, which also has a concrete extent in the axial direction of the cylindrical housing. In this respect, the present invention also differs from that of the EP 0 319 861 Prior art cartridge in which a plurality of outlet openings are formed by crossed slots in a polyester film, which is fastened together with other, the polyester film between them clamping or stiffening annular discs.

This polyester film lies in the axial direction inwardly toward the front end of the end cap, which is formed by the outer surface of a polyethylene disc. Thus, the slit portion of the polyester film is moved from one forward, i. Surrounded by the distal edge and formed by the overlying layers of the end cap edge on which contamination can nest and which precludes hygienic continuous operation of the cartridge to remove food.

In the cartridge according to the invention, the valve body is only slightly in the axial direction. Typically, the valve body is formed so that the distal end of the valve body axially slightly above or equal in height with the distal, i. free surface of the end cap is. Slightly means here in particular a projection of the valve body with respect to the free surface of not more than 2 mm, preferably not more than 1 mm or not more than 0.5 mm. This washer is regularly that part of the end cap which is directly connected to the cylindrical housing and accordingly ensures the tightness at the distal end between the cylindrical housing and the end cap and carries the valve body. Thus, the at least one valve flap is regularly arranged inside the valve body ring. The valve flap is in this embodiment not at the front axial end of the cartridge, but is offset from the front free end axially inwardly back.

With a view to a good emptying is proposed according to a preferred embodiment of the present invention that between the valve flap and the valve body ring, a ring portion is provided, the wall thickness is less than the wall thickness of the valve body ring and / or the valve flap. This ring section allows prefiltering of the valve flap (s) during removal of food from the cartridge due to increased internal pressure. The ring section serves as a kind of joint around which the valve flap (s) project outwards and finally flex outwards in this projected position in order to let out product to be conveyed through the outlet opening.

The protuberance of the valve flap (s) into the protruding position is improved by a development of the present invention, in which a cylinder section connected radially inward to the ring section is provided, whose proximal end projecting into the valve body ring is connected to the valve flap and flaps.

The cylinder portion does not necessarily have to be strictly cylindrical. Rather, it can easily slightly taper slightly radially. However, the cylinder section has a predominantly axial extension and accordingly connects the annular section, which extends predominantly in the radial direction, with the valve flap or likewise extending in the radial direction. The ring portion together with the cylinder portion allow everting of the area located within the valve body ring. Through the ring portion and the cylinder portion, different pivot points can be formed around which the valve flap (s) can easily flex forward.

In this case, a plurality of valve flaps are preferably distributed in the circumferential direction, which have a radially inwardly tapering cross-section. This embodiment prevents unwanted opening of the valve flaps when pre-slipping the valve flaps. The valve flaps usually have a wall thickness at least at their radially outer end connected to the cylinder section and / or the ring section, which is greater than the wall thickness of the ring section or cylinder section. Thus, the valve lugs form a relative to the radially outer and reaching to the valve body ring areas of the valve a relatively dimensionally rigid sealing disc, which release the exhaust port only after Vorstülpen and due to the increased internal pressure by preflexing the valve flaps.

With a view to a compact design of the valve is proposed according to a preferred embodiment of the present invention that the cylinder portion and the valve flaps have an axial extent of between 3 and 8 mm and that not more than a quarter of this axial extent projects beyond the valve body. In this case, it is usually assumed that the ring section protrudes axially forward from the valve body ring and that the configuration of the valve body proceeds proximally at the transition between the ring section and the cylinder section. The radially inner portion of the ring portion accordingly forms in the initial position the axially furthest from the cartridge part of the valve. From this projecting part, the entire axial extension of cylinder section and valve flaps is usually measured according to the development discussed here. The valve lobes are preferably located within the valve body ring, preferably in at about the middle axial height. Alternatively, the valve flaps may also protrude proximally over the valve body ring.

In view of a good attachment of the valve body to the cartridge is proposed according to a preferred embodiment of the present invention that between the valve body ring and the mounting flange an inwardly recessed offset is formed. This offset is usually formed in the form of a circumferential annular groove and can accordingly accommodate, for example, the material forming the end cap. This is preferably fitted in the annular groove.

As an end cap, a fixedly connected to the cylindrical housing bottom is regularly provided, which is connected in the manner described above by crimping and optionally welding to the cylindrical housing. Just as well, however, the valve body can be provided on an attachment disc, which can only be applied sealingly against the end cap and reused when the cartridge is emptied. The attachment disc is inserted between the cartridge and an end-side and formed by the cartridge gun holding surface. Accordingly, when dosing out food from the cartridge, the cartridge is pressed with its end cap against the attachment disc. The mounting flange of the valve body settles sealingly against the end cap and surrounds the outlet opening formed by the end cap, so that material can pass through this outlet opening and through the attachment disc to the valve body and can be discharged there in the manner described above.

The mounting flange of the valve body is therefore either sealingly applied to the inner surface of the end cap or between an outer surface of the end cap and the attachment disc. With a view to the best possible sealing silicone is preferably selected as the elastic plastic for the formation of the valve body.

In a further preferred embodiment of the present invention, the end cap or the attachment disc has a film which defines a central recess for metering out the food. The film is perforated close to the edge of the recess. Accordingly, the recess is usually circumferentially surrounded by one or more rows of holes. The valve body is connected by molding with the film. When encapsulating flows through the valve body forming elastic Plastic material the perforation, so that there is a permanent and tight connection between the valve body and the film. The said mounting flange can be formed solely by the material of the encapsulation within the perforation. Usually, however, results on both sides of the film an accumulation of elastic plastic and thus a positive attachment of the mounting flange.

The valve body is preferably heat sealed to the washer of the end cap. In this case, the fastening flange of the valve molding may be arranged between the annular disk and a sealing film connected to the inner surface of the annular disk. This sealing film is sealed at least with the washer, including the mounting flange. The sealing film may also be optionally connected to the inner surface of the mounting flange, for example glued or welded.

In an alternative embodiment, the valve body is arranged as an insert within a holding mold part. This retaining molding has a bearing against the inner surface of the annular disc and thus sealed retaining flange and a distal fitting to the valve body retaining collar. In an internal pressure which delivers the contents of the cartridge, the valve body is sealingly applied against this retaining collar. Furthermore, owing to the elastic properties of the valve shaped body, sufficient sealing occurs both with respect to the retaining collar and with respect to a circumferential phase boundary which is regularly formed by the valve body ring of the valve molding on the one hand and an inner circumferential surface of the retaining molding. This phase boundary usually extends in the axial direction of the cylindrical housing.

The present invention further claims an attachment disk of the type mentioned above. This attachment disc has a valve body according to one of claims 1 to 14.

Figur 1

eine Draufsicht auf das ausgabeseitige Ende eines Ausführungsbeispiels einer Kartusche vor dem Aufsetzen einer Vorsatzscheibe;

Figur 2

das Ausführungsbeispiel nach Figur 1 nach dem Aufsetzen der Vorsatzscheibe;

Figur 3a

eine Längsschnittansicht des Ventilformkörpers in einer Ausgangsposition;

Figur 3b

der in Figur 3a gezeigte Ventilformkörper in einer vorgestülpten Position;

Figur 4

eine Längsschnittansicht zur Verdeutlichung einer ersten Variante zur Befestigung des Ventilformkörpers nach Figur 3;

Figur 5

eine Längsschnittansicht zur Verdeutlichung einer zweiten Variante zur Befestigung des Ventilformkörpers nach Figur 3;

Figur 6

eine Längsschnittansicht zur Verdeutlichung einer dritten Variante zur Befestigung des Ventilformkörpers nach Figur 3;

Figur 7

eine Längsschnittansicht eines alternativen Ausführungsbeispiels des Ventilformkörpers; und

Figur 8

eine Längsschnittansicht eines weiteren Ausführungsbeispiels eines Ventilformkörpers mit einem Halteformteil zur Halterung desselben.

Further details and advantages of the present invention will become apparent from the following description of an embodiment in conjunction with the drawings. In this show:

FIG. 1

a plan view of the output side end of an embodiment of a cartridge before placing an attachment disc;

FIG. 2

the embodiment according to FIG. 1 after placing the attachment disc;

FIG. 3a

a longitudinal sectional view of the valve body in a starting position;

FIG. 3b

the in FIG. 3a shown valve bodies in a prepositioned position;

FIG. 4

a longitudinal sectional view to illustrate a first variant for attachment of the valve body after FIG. 3 ;

FIG. 5

a longitudinal sectional view to illustrate a second variant for fixing the valve body after FIG. 3 ;

FIG. 6

a longitudinal sectional view to illustrate a third variant for attachment of the valve body after FIG. 3 ;

FIG. 7

a longitudinal sectional view of an alternative embodiment of the valve body; and

FIG. 8

a longitudinal sectional view of another embodiment of a valve body with a holding mold part for holding the same.

The FIG. 1 shows a top perspective view of a cartridge 2, which in accordance with the disclosure of DE 100 06 288 A1 a cylindrical container 3 is formed. FIG. 1 lets recognize a bottom 4, which is enclosed by a beaded edge 6. The bottom 4 has a cardboard ring 8 with a central recess 10 which is covered by a film 12 which is sealed on the inside of the cardboard ring 8 and provided within the recess 10 with a plurality of cross slots 14, the outlet 16 for contained in the cartridge 2 To train food.

In the Figures 1 and 2 is designated by reference numeral 18 an attachment disc. This attachment disc 18 is made of plastic, such as polyethylene and is injection molded. The attachment disc 18 has an outer diameter such that the attachment disc 18 can be arranged within the beaded edge 6 with little play, preferably can be fitted into the flanged edge 6 in order to fix the attachment disc 18 removably to the cartridge 2. The attachment disc 18 carries a bore 20 (see. FIG. 4 ) penetrating valve body 22.

This valve body 22 has a mounting flange 24, which forms the proximal end of the valve body 22 and carries a marked with reference numeral 26 valve body ring, which is spaced by an annular groove 28 against an outer surface 30 of the mounting flange 24.

By relatively radially thick valve body ring 26 of the valve body 22 is stiffened. The wall thickness of the valve body ring 26 is about twice as large as the radial wall thickness at the level of the annular groove 28. A continuous smooth inner peripheral surface 32 extends from the mounting flange 24 to the distal end of the valve body ring 26. This is surmounted by a ring portion 34 whose Inner peripheral surface is continued by the inner peripheral surface 32 of the valve body 22 initially straight. The ring portion 34 extends slightly conically and radially inwardly from the valve body ring 26. The distal end of the valve body 22 is formed by a transition region between the ring portion 34 and a designated with reference numeral 36 cylinder portion. The cylinder portion 36 and the ring portion 34 are formed approximately with the same wall thickness. The cylinder portion 36 extends substantially in the axial direction and carries at its proximal end a plurality of valve flaps 38 which are circumferentially spaced from each other and are separated from each other by a central Phillips, and substantially sealingly abut each other when the valve body 22, the in FIG. 3a shown starting position occupies.

The valve body ring 26 and the valve lugs 38 have an axial extent, which in the present case projects beyond the front end side of the valve body ring 26 by only one fifth, but is accommodated in the valve body ring 26 via the axial residual length. In any case, in the starting position, the valve has a small axial extent, which is essentially limited to the extension of the valve body ring 26 via the material of the attachment disc 18 or the end cap 4 plus the axial extent of the ring portion 34.

The relatively thin cross-section of the cylinder portion 36 is realized primarily at the transition region to the ring portion 34. As expansion in the axial direction progresses, the cylinder portion 36 thickens and merges into the outer surface of the valve flaps 38 on the outer surface via a concave curvature. In the region of the smallest radius between the cylinder portion 36 and the valve flap 38 is thickened Corner 40 formed. From this corner region 40, the wall thickness of the valve flaps 38 decreases in the radial direction. The aforementioned cross slot is located only on the substantially radially extending portions of the valve tabs 38, ie ends radially in front of the corner portion 40 and forms an outlet 41 from.

The in the Figures 1 and 2 shown attachment plate 18 is usually applied to the bottom 4 of the cartridge 2, while the cartridge 2 is vertical. Thereafter, the cartridge 2 is inserted into a caulking gun. The attachment disc 18 is clamped between a holding plate of the cartridge gun and the bottom 4. An axially drivable plunger of the caulking gun is applied against a not shown in the figure, sealed in the cartridge 2 recorded piston. When the cartridge gun is actuated, this piston is urged in the direction of the bottom 4 forming an end cap 40 of the cartridge 2. In this case, between the piston and the end cap 40 located sauce is placed under internal pressure. This internal pressure causes the valve flaps 38 together with the cylinder portion 36 to be everted outwards. The result is a flex movement, at the end of which the inside of the valve flaps 38 pending liquid under pressure has pressed the valve flaps 38 together with the cylinder portion 36 in a protruding position, the in FIG. 3b is shown. In this position, the internal pressure pushes the valve tabs 38 apart in the area of the cross slot and releases the outlet opening 41. The food, ie the liquid sauce emerges.

In this case, the cartridge gun is usually designed so that, following the advancement of the delivery plunger and due to the slight internal pressure and because of the adhesion of the piston to the wall of the cylindrical housing 3 of the cartridge 2, the liquid is withdrawn into the cartridge 2. As part of this movement, the valve body 22 of the in FIG. 3b shown protruding position in the in FIG. 3a shown default position, and mainly due to an elastic return of the valve body 22. This consists in the embodiment shown of silicone.

The FIG. 4 shows a first variant for attaching the valve body 22 to the attachment plate 18. Its bore 20 is dimensioned such that it rests in the outer circumference in the region of the annular groove 28 basically and accordingly in the axial direction between a projection formed by the valve body ring 26 and the mounting flange 24 is clamped. In this case, the mounting flange 24 can be pressed and applied solely by internal pressure against the attachment plate 18. Of course, it is possible to glue the mounting flange 24 against the inner surface of the attachment plate 18 or attach in any other way.

So far FIG. 4 has been described as an example in which the valve body 22 is connected to the attachment plate 18, in the same way the valve body 22 may alternatively also directly against the ground, ie the end cap 4 is fixed and completely dispensed with an attachment disc.

The FIG. 5 shows an alternative embodiment for fixing the valve body 22. In this embodiment, the film 12 has a central recess 42 which is arranged approximately concentrically to the central longitudinal axis of the cylindrical container 3 of the cartridge 2. The edge region of this recess 42 is perforated. In the present case, two rows of holes extend around the edge of the recess 42 in the circumferential direction and form a perforation 44.

The valve body 22 is formed by molding the edge region of the film 12. In this encapsulation, the plastic material forming the valve shaped body 22 flows through the perforation 44 and accordingly connects the shaped valve body 22 with the sheet material 12 in a form-fitting and cohesive manner.

The FIG. 6 shows an alternative embodiment. In this embodiment, the mounting flange is clamped between a top film 46 and a bottom film 48 and sealing sealed, for example by gluing. Also, the two films 46, 48 may be welded together with the inclusion of the mounting flange 24 and / or radially outside of the mounting flange 24.

With reference to the FIGS. 4 to 6 discussed variants for mounting the valve body 22 apply both to the attachment to an attachment disc 18 and to an end cap. 4

The solution according to the invention has the advantage that even low-viscosity liquids, which are received as food in a cartridge 2 of the type mentioned, even with an arrangement of the cartridge 2 with the end cap 4 down permanently in the cartridge 2 may remain and not drip out through the outlet opening 41. By Vorstülpen the valve body 22 in the product removal and the special configuration of the valve body 22, a nearly complete emptying can be guaranteed. In addition, the valve body 22 can be easily maintained, since this - as for example FIG. 2 visible - protrudes from the mounting flange and also from the end cap 4 and the attachment plate 18. In the case of an attachment disc 18, this can be removed and cleaned separately and reused for the next cartridge 2.

The inventive value of the utility value of the cartridge 2 is thus increased.

FIG. 7 shows an alternative embodiment of a valve body 22. The same elements are compared to the embodiment described above with the same reference numerals. The embodiment shown there on the one hand characterized in that the valve body ring 26 is not formed thickened in the axial direction, but is formed by a radially inner portion of the mounting flange 24. This in FIG. 7 embodiment shown has a very small axial extent of between 3.5 and 4.5 mm. A marked with reference numeral 50 distal surface of the valve body 22 only slightly surmounted by an annular disk forming a cardboard ring 8. The valve body 22 projects less than 1 mm relative to the outer surface of this annular disc 8.

As can be seen, the material forming the annular disc 8 is bent radially outward to form a radially extending edge 52. This edge 52 is located between a distal end of the cylindrical housing and a designated end portion of the sheet-like material designated 54, which forms the cylindrical housing 3. This can be plastic film or cardboard. A cardboard is usually coated inside with a plastic, such as polyethylene.

Against the inner surface of the annular disc 8 of the mounting flange 24 is applied. On the opposite side of the annular disc 8 is a sealing foil 56 on the mounting flange 24, which is sealed to the inner surface of the annular disc 8 radially outside of the mounting flange 24. The sealing film 56 can with the inner surface of the mounting flange 24 connected, for example, be glued. In the edge region, the sealing film 56 may axially bend around with the edge 52 of the annular disc 8 and accordingly be wrapped by the cylindrical housing 3 ausformenden material. This peripheral structure is beaded around to connect the cylindrical housing 3 in a fluid-tight manner with the annular disc 8 and thus the bottom 4. By welding, the sealed film 56 connected to the coated cardboard of the annular disc 8 can be melted in the edge region and intimately connected to the annular disk.

FIG. 7 further illustrates a label 58 which is releasably sealed to a distal surface 60 of the annular disc 8 and hermetically seals the outlet port 41 prior to the first metering.

The FIG. 8 shows a further alternative embodiment, wherein the annular disc 8 is shown only in sections. On the inner surface of the annular surface 8 is a retaining flange 62 of a holding mold part 64 at. This retaining flange 62 is sealed with a plastic coating on the inner surface of the annular disc 8. The holding mold part 64 further has a holding cylinder 66, in which the valve shaped body 22 is held in the manner of an insert. Distally from the holding cylinder 66, a retaining collar 68 protrudes radially inwards and partially projects beyond the valve shaped body 22.

At the axially opposite end a cylindrical contact surface for the valve body 22 of the holding cylinder 66 is surmounted by locking projections 70 which engage over the proximal end of the valve body 22, so that the valve body 22 is positively fixed axially between the locking projections 70 and the retaining collar 68.

LIST OF REFERENCE NUMBERS

2

cartridge

3

cylindrical housing

4

Floor / cap

6

edge

8th

carton ring

10

recess

12

foil

14

Phillips

16

outlet

18

front cover lens

20

drilling

22

Valve moldings

24

mounting flange

26

Valve body ring

28

ring groove

30

outer surface

32

Inner circumferential surface

34

ring section

36

cylinder section

38

valve flap

40

corner

41

outlet

42

recess

44

perforation

46

top film

48

lower film

50

distal surface of the valve body 22

52

edge

54

hammered end section

56

sealing film

58

label

60

distal surface of the annular disc / cardboard ring 8

62

retaining flange

64

Holding mold part

66

holding cylinder

68

retaining collar

70

catch projection

Claims (16)

A cartridge (2) comprising a cylindrical housing (3) having a piston held between a piston movably held in the cylindrical housing (3) and sealed against the inner wall of the cylindrical housing (3) and an end cap (4) provided with an outlet opening (41). enclosing the receiving space
marked by
a molded valve body (22) made of an elastic plastic, which has at least one valve flap (38), which sealingly seals the outlet opening (41) in an initial position. Cartridge (2) according to Claim 1, characterized by a label (58) which externally covers the valve shaped body (22). Cartridge (2) according to claim 1 or 2, characterized in that the valve body (22) has a mounting flange (24) for engagement with the end cap (4). Cartridge (2) according to one of the preceding claims, characterized in that the valve shaped body (22) has a valve body ring (26) which surrounds the valve flap (38) circumferentially. Cartridge (2) according to one of the preceding claims, characterized in that a distal end of the valve body (22) in the axial direction only slightly surmounted a distal surface of the annular disc (8) which is connected to the cylindrical housing (3). Cartridge (2) according to one of the preceding claims, characterized in that the valve flap (38) within the valve body ring (26) is arranged. Cartridge (2) according to one of the preceding claims, characterized in that between the valve flap (38) and the valve body ring (26) is provided a ring portion whose wall thickness is less than the wall thickness of the valve body ring (26) and / or the valve flap (38). is. Cartridge (2) according to one of the preceding claims, characterized by a cylinder section (36) which is connected radially on the inside to the annular section (34) and has a proximal end projecting into the valve body ring (26) connected to the valve flap (38). Cartridge (2) according to one of the preceding claims, characterized by a plurality of valve flaps (38) distributed in the circumferential direction, which have a radially inwardly tapering cross-section. Cartridge (2) according to one of the preceding claims, characterized in that the cylinder portion (36) and the valve lugs (38) have an axial extent of between 3 and 8 mm and that not more than a quarter of this axial extent the valve body ring (26). surmounted. Cartridge (2) according to one of the preceding claims, characterized in that the valve shaped body (22) with the annular disc (8) of the end cap (4) is connected. Cartridge (2) according to one of the preceding claims, characterized in that the fastening flange (24) of the valve shaped body (22) is arranged between the annular disc (8) and a sealing foil (56) connected to the inner surface of the annular disc (8). Cartridge (2) according to one of Claims 1 to 11, characterized in that the valve shaped body (22) is arranged as an insert within a holding mold part (64) in such a way that a retaining flange (62) lying against the inner surface of the annular disc (8) and thus sealed therewith and a retaining collar (68) abutting the valve shaped body (22) distally. Cartridge (2) according to one of the preceding claims, characterized in that the end cap (4) or the attachment disc (18) has a film (12) having a central recess (42) that the film (12) close to the edge Recess (42) is perforated and that the valve body (22) is connected by encapsulation with the film (12). Cartridge (2) according to one of the preceding claims, characterized by a valve body (22) having an attachment disc (18) which against the end cap (4) can be applied. An attachment disk (18) with a valve molding (22) according to one of claims 1 to 14.

Images