Cartridge, shoulder element and manufacturing method therefor

Abstract

The invention is a shoulder element (10) for a cartridge, - a base portion having a discharge hole, - a discharge element (18) formed on the discharge hole, - a lateral portion (33) being formed on a periphery of the base around the discharge element (18), - a collar portion (30) extending outwards from the lateral portion (33), and - a snap arrangement for snapping on an end ring of a pre-assembled cartridge, the snap arrangement being formed on the periphery of the base portion, extending outer than the lateral portion (33), wherein at least one air channel (44) is formed for allowing air through the snap arrangement. The invention is, furthermore, a cartridge and a manufacturing method therefor, as well as a set for a cartridge.

Description

[0001] CARTRIDGE, SHOULDER ELEMENT AND MANUFACTURING METHOD THEREFOR

[0002] TECHNICAL FIELD

[0003] The invention relates to a shoulder element for a cartridge, to the manufacturing method of the cartridge and to the cartridge itself, as well as to a set for the cartridge.

[0004] BACKGROUND ART

[0005] Cartridges for sealants and other materials, such as silicone cartridges are widely used for construction purposes. Such cartridges are typically single-use items that are made of plastic materials, which poses problems related to recyclability.

[0006] Currently available plastic cartridges have limited PCR (post-consumer recycled) plastic content due to the technical limitations of injection moulding. These cartridges are still typically non-recyclable because their plastic components get contaminated during use with the chemicals they contain (e.g., silicone and beyond). Therefore, they typically end up in landfills or are incinerated in waste incineration plants, coming short of fulfilling the goals of the targeted “circular economy”.

[0007] The mainstream prior art approach with the intention to make at least in some extent reusable silicone cartridges is the so called “sausage-in-a-cartridge” approach.

[0008] This prior art approach is based on filling a separate foil bag (“sausage”, since this is the widely used term on the relevant technical field, this will be used afterwards) with silicone or other filler material to be included in the cartridge, and inserting and fixing the sausage in the cartridge such that the material can be extracted from it by pushing the piston at the bottom end of the cartridge.

[0009] In case of cartridges of the “sausage-in-a-cartridge” approach the opening / piercing of the sausage (bag) requires ultra-high forces. On the one hand, this is uncomfortable, on the other hand most (cheap) cartridge dispenser guns cannot even handle the cartridges of this kind, which may result in malfunction.

[0010] Several prior art documents are related to the “sausage-in-a-cartridge” approach, hereby only some such documents are mentioned, like EP 3936455 A1 in which a sausage is applied which is to be pierced by means of the appropriate shoulder applied in the approach.

[0011] A sausage-based prior art cartridge is disclosed in US 8,172,109 B2 and US 8,281 ,956 B2 also. Also, in WO 2023 / 170036 A1 a sausage-based approach is disclosed, wherein the shoulder is arranged on the cartridge in which a sausage arranged before in closed form. The shoulder has an element for piercing the sausage when the piston is pushed on the other end of the cartridge.

[0012] EP 1607142 A1 (also published as US 2009 / 0065527 A1 ), EP 1854737 A2 and US 5,332,122 also disclose cartridges applying sausage-based approach.

[0013] The sausage-based approach is mentioned as prior art in US 5,593,066, but in this document a sausage closed only at one of its ends and at the other end opened to a discharge head is also disclosed.

[0014] In US 6,464, 112 B2 (see also publication under US 2002 / 0162859 A1 ) the sausagebased approach is also mentioned as prior art. In this document, also a sausage closed at one end and open at the other end is applied in a cartridge cover. An end ring is connected to the open end and when the half-closed sausage (bag) is inserted to the cartridge cover, the end ring is placed onto the open end of the cartridge cover (see Figs. 8A and 8B of the document). After that the bag is prepared for filling (see Fig. 8C of the document, where lubricating means are applied) and, afterwards the bag is filled with filler material from its open end (see Figs. 8I-8K of the document, wherein Fig. 8K shows the application of a seal film after filling). Furthermore, Figs. 8L-8M and 9A of the document shows that after the above steps a shoulder is placed onto the open end of the cartridge and the shoulder is fixed by means of a retaining collar.

[0015] In US 8,276,755 B2 a cartridge is disclosed which has a shoulder formed with gas expulsion groove sections which are cutouts on the side of the shoulder. The shoulder has a collar section which encompasses the end of the cartridge to which it is to be connected. The shoulder is welded to the ring member of the cartridge to achieve airtightness. After the above sausage-based prior art documents and a first group of prior art documents, further prior art documents are introduced herebelow, firstly in connection with other cartridge configuration approaches.

[0016] EP 4108598 A2 describes a cartridge configuration with a foil layer on the inside of the wall and a shoulder to be inserted into a front auxiliary element. The front auxiliary element is also used to provide a seal, on which a protective film is arranged to seal the interior before the shoulder is inserted (see Fig. 5 of the document) or, if closed, can be opened by a piercing element of the shoulder (see Fig. 4 of the document). To separate the piston, an additional film reference number 18 is utilized as shown in Fig. 6 of the document. As explained in the document, the inner space of the cartridge is delimited by foils to prevent the components from coming into direct contact with the filler material. This separation of the shoulder can be provided before use, but it will become contaminated during use as the filler material passes through it.

[0017] Furthermore, in US 5,667,102 a cartridge with double container is disclosed, in which in a respective container the piston moves in an inner foil (see Fig. 6 of the document). Similarly, an inner foil is applied in the cartridge in US 2008 / 0156831 A1.

[0018] Herebelow, secondly, prior art documents related to cartridge pistons for are introduced.

[0019] In JP 2007297119 A a cartridge with a piston is disclosed, wherein a dispenser gun with a plate (teller) for pushing the piston and an approach for inserting a reinforcement ring is disclosed.

[0020] In US 5,449,096 discloses a piston for a dispensing tool, in connection with which centering action is described. US 6,494,348 B2 is also related.

[0021] Further pistons for cartridges are disclosed in CN 111439474 A, DE 2034047, DE 19643506 A1 , EP 2522438 B1 , EP 3608029 A1 , US 4,834,268, US 5,370,282, US 2019 / 0193919 A1 , US 10,543,508 B2, US 11 ,541 ,416 B2, US 11 ,835,139 B2, WO 99 / 47433 A1 . In view of the known approaches, there is a need for a cartridge with improved components and configuration compared to known approaches.

[0022] DESCRIPTION OF THE INVENTION

[0023] The primary object of the invention is to provide a shoulder element and cartridge therefor which are free of the disadvantages of prior art approaches to the greatest possible extent.

[0024] The object of the invention is to provide a shoulder element for the cartridge which is more effective than the prior art approaches, preferably in closing and in the respect of expulsion of air from the cartridge when it is closed by the shoulder element. Moreover, a further object is to provide a manufacturing method for a cartridge for effective assembly of the cartridge in which the shoulder element is utilized.

[0025] Furthermore, the object of the invention is to preferably provide a cartridge that may be composed out of (i.e. made of) recycled materials, is designed to be recyclable, and also looks sustainable (cardboard has a priority as a material). Further preferred objects are to be compatible even with cheap cartridge dispenser guns, can be emptied to the maximum to reduce chemical waste, to have compatibility with existing filling lines, and to be cost efficient (from the aspects of) production and filling.

[0026] The objects of the invention can be achieved by providing the shoulder element according to claim 1 , the method for manufacturing a cartridge according to claim 4, the set for a cartridge according to claim 10, and the cartridge according to claim 11 . Preferred embodiments of the invention are defined in the dependent claims.

[0027] BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Preferred embodiments of the invention are described below by way of example with reference to the drawings, where

[0029] Figs. 1A and 1 B are a sectional-spatial view and a sectional view of a first embodiment of the cartridge according to the invention,

[0030] Figs. 2A-2E show components of the first embodiment of the first embodiment shown in Figs. 1 A and 1 B, Fig. 3A shows a sectional-spatial view of a pre-assembled cartridge of the first embodiment of the cartridge according to the invention,

[0031] Fig. 3B shows a nozzle applicable the first embodiment,

[0032] Figs. 3C-3E shows a first embodiment of the shoulder element applied the first embodiment of the cartridge from an upper spatial view, with Fig. 3E being a partial view of Fig. 3D,

[0033] Figs. 4A and 4B show spatial sideview of the pre-assembled cartridge of the first embodiment as well as the filled pre-assembled cartridge,

[0034] Figs. 5A-5C illustrate the insertion of the shoulder element into the preassembled cartridge,

[0035] Fig. 5D shows the sectional view of the assembled cartridge in the first embodiment,

[0036] Figs. 6A and 6B show the assembled cartridge in the first embodiment in a filled state and empty,

[0037] Figs. 7A and 7B illustrate the shoulder element having induction-sealed covering element,

[0038] Fig. 8 illustrates a cartridge in which the content of it has been emptied, and the shoulder is removed from the end of the cartridge cover tube,

[0039] Figs. 9A and 9B show separately in a spatial and a sectional view the shoulder with the emptied closed foil tube,

[0040] Fig. 10 illustrate the pushed-up piston within the cartridge,

[0041] Figs. 11 A and 11 C show the cartridge according to the invention in a second embodiment in a filled status in a spatial view and in a sectional-spatial view as being empty,

[0042] Fig. 12 shows components of the second embodiment of the cartridge according to the invention,

[0043] Fig. 13 shows a flow diagram of the steps for manufacturing the preassembled cartridge of the second embodiment,

[0044] Figs. 14A and 14B illustrate the steps of manufacturing with the help of the components needed,

[0045] Figs. 15A-15D show a first variant for insertion of the end ring into the foil tube, Figs. 16A-16E illustrate a further variant for the insertion of the end ring into the foil tube,

[0046] Figs. 17A-17D illustrate a yet further variant for the insertion of the end ring into the foil tube,

[0047] Figs. 18A and 18B show a further variant of insertion of the end ring into the foil tube,

[0048] Figs. 19A-19B illustrate the closing of one of the ends of the foil tube,

[0049] Figs. 20A and 20B illustrate the insertion of the piston from an upper end and from a lower end,

[0050] Figs. 21 A and 21 B illustrate the insertion the closed-off foil tube into the cartridge cover tube as well as the pre-assembled cartridge,

[0051] Figs. 22A and 22B shown in a sectional view and in spatial view a third embodiment of the cartridge according to the invention,

[0052] Fig. 23A illustrate a pre-assembled cartridge of the third embodiment,

[0053] Fig. 23B shows the nozzle applicable for the third embodiment,

[0054] Fig. 23C shows the shoulder element of the third embodiment of the cartridge,

[0055] Fig. 24 shows the pre-assembled cartridge of the third embodiment in a sectional view,

[0056] Figs. 25A and 25B show the part with the shoulder element of the third embodiment of the cartridge, as well as a partial view thereof,

[0057] Figs. 26A and 26B illustrate the end ring of the third embodiment of the cartridge,

[0058] Fig. 27 shows another end of the cartridge with the piston,

[0059] Figs. 28A and 28B illustrate the auxiliary end ring of the third embodiment, Figs. 29A-29C show the second embodiment of the shoulder element in the third embodiment of the cartridge in a spatial view, in a first and second sectional view,

[0060] Figs. 30A and 30B illustrate the piston of the third embodiment of the cartridge in a spatial view and in a sectional view,

[0061] Fig. 31 shows the components of the third embodiment of the invention,

[0062] Fig. 32 is a flow diagram of the method for manufacturing of the preassembled cartridge, Fig. 33 illustrates the steps of insertion of the piston and the end rings into the foil tube,

[0063] Figs. 34A-D illustrate the steps of insertion of the piston and the end ring into the foil tube,

[0064] Fig. 35 illustrates the insertion of the foil tube into the cartridge cover tube, Figs. 36A-36B illustrate a first stage of assembling of the cartridge of the third embodiment,

[0065] Fig. 37 illustrates the insertion of the auxiliary end ring,

[0066] Fig. 38 a pre-assembled cartridge of the third embodiment,

[0067] Figs. 39A-39I show a second embodiment of the shoulder element,

[0068] Figs. 40A-40I illustrate a third embodiment of the shoulder element,

[0069] Figs. 41 A-411 illustrate a fourth embodiment of the shoulder element,

[0070] Figs. 42A-42G illustrate a fifth embodiment of the shoulder element, Figs. 43A and 43B show a fourth embodiment of the cartridge,

[0071] Fig. 43C shows a detailed view of the top part of Fig. 43B with the shoulder element,

[0072] Fig. 44 illustrates a further variant of the nozzle applicable for the cartridge, Figs. 45A and 45B show a fifth embodiment of the cartridge in a sectional view and in a spatial view,

[0073] Figs. 46A-46J illustrate an embodiment of the piston applied in the fifth embodiment of the cartridge,

[0074] Figs. 47A-47B illustrate the usage of a piston pushing plate with a flat surface of the piston, and

[0075] Figs. 48A-48C show the usage of the piston pushing plate with a projecting portion of the piston.

[0076] MODES FOR CARRYING OUT THE INVENTION

[0077] The invention thus relates to a cartridge, to a shoulder element applicable in the cartridge and a method for manufacturing the cartridge.

[0078] The cartridge according to the invention comprises

[0079] - a pre-assembled cartridge having o a storage space portion filled with a filler material, and o an end ring being in a load end of the storage space portion (for preassembled cartridges 15, 115 see Figs. 3A and 23A, respectively, wherein also storage space portions 51 , 151 , load ends 17, 117 and end rings 34, 134 are denoted; for cartridges filled with a filler material 20, see e.g. Figs. 1 B and 11 A), and

[0080] - an embodiment of the shoulder element according to the invention, wherein the storage space portion of the pre-assembled cartridge is closed with the shoulder element by snapping the snap arrangement of the shoulder element on the end ring (see below for the definition of the shoulder element according to the invention, where its elements for connecting it to the pre-assembled cartridge will also be described; the end ring may be called a main / first end ring, it is preferably inserted into / arranged in the load end).

[0081] A plurality of embodiments of the shoulder element according to the invention are introduced in the description below. In the description of the figures, a convention has been followed that the embodiments of the cartridge, as well as the embodiments of the shoulder element are numbered serially independently from each other by consecutive numbers.

[0082] Similar to prior art cartridges, this is a cartridge for a gun as touched upon above. Thus, the cartridge can be arranged for use in a gun for operating via pushing a piston preferably arranged in the cartridge. The cartridge is applicable for example for a sealant, in general for a material to be discharged (i.e. for delivering that of).

[0083] In Figs. 1A and 1 B the first embodiment of the cartridge according to the invention is shown. In Fig. 1A the cartridge is shown in a spatial view. In Fig. 1A - because of the spatial view - the specialities of the embodiment of the cartridge according to the invention cannot be seen.

[0084] In Fig. 1 A a cartridge cover tube 12 being an outer coverage of the cartridge along its longitudinal direction can be seen. Furthermore, a nozzle 14 is shown in Fig. 1A which is to be connected to a discharge element 18 (being in a closed status in Fig. 1A, it can be opened removing its end, i.e. its tip) of the cartridge. The nozzle 14 will be also shown in Fig. 3B; it can be also seen in Fig. 1A that it has a handle 26 with the help of that it is connected to the discharge element 18 (cf. Fig. 3B wherein a hole 28 of the handle 26 of the nozzle 14 can be observed).

[0085] Furthermore, Figs. 1A-1 B show that the cartridge is provided with a shoulder element 10.

[0086] In Fig. 1 B the inner configuration of the first embodiment of the cartridge can be observed in a sectional-spatial view. In Fig. 1 B the shape of the shoulder element 10 can be observed in the sectional view and it is illustrated in Fig. 1 B that the cartridge is filled up (see for the illustration of the content of a filler material 20 of the cartridge with a wavy upper level in the inner space of discharge element 18).

[0087] In Fig. 1 B it can also be observed that the filler material 20 is filled into a first foil tube 36, wherein the first foil tube 36 - called shortly foil tube 36 or closed foil tube 36 in the followings - is closed at one of its ends, it could also be called a half- closed / closed-off foil tube or half-closed foil sleeve. Namely it is closed at its end which is opposite to the shoulder element 10; a closure clip 37 at the closed end thereof is inserted into a piston 22, wherein the piston 22 is inserted into the respective end of the cartridge cover tube 12. In accordance with this, the cartridge cover tube 12 is closed by the shoulder element 10 in one of its ends and the piston 22 is inserted into its other end.

[0088] In Fig. 1 B, furthermore, the inner configuration of the nozzle 14 can be observed, as well as its connection to the discharge element 18 in the illustrated state where it is arranged to be ready to use.

[0089] In Figs. 2A-2E components of the first embodiment of the cartridge according to the invention are shown. According to this depiction, the assembly of these components can be better interpreted.

[0090] Fig. 2A shows the foil tube 36 with its end closed by the closure clip 37 (it can be closed in other ways also, so the manner of closing is not crucial, see also below) and an end ring 34 inserted into its open end (this will form a load end 17 of a storage space portion 51 of a pre-assembled cartridge 15, see Figs. 3A and 4A). It can be understood that the closed foil tube 36 is inserted into the cartridge cover tube 12 of Fig. 2B in such a way that its closed end with the closure clip 37 is inserted into it and a collar portion of the end ring 34 will sit onto the end of the cartridge cover tube 12 (for a collar portion and a tube-shaped portion, see Figs. 26A and 26B where these are denoted on an end ring 134 being very similar to the end ring 34).

[0091] It can also be understood that the shoulder element 10 of Fig. 2C will be inserted into that end of the foil tube 36 into which the end ring 34 is inserted, accordingly a collar portion 30 of the shoulder element 10 will sit also on a load end edge 19 of cartridge cover tube 12 (for the load end edge see Figs. 3A and 4A) in such a way that the collar of the end ring 34 is arranged between the collar portion 30 and the end of the cartridge cover tube 12.

[0092] Figs. 2C and 2D show inner threads 24a in the nozzle 14 and outer threads 24b in the discharge element 18 by the help of which threads 24a, 24b the nozzle 14 can be screwed onto the shoulder element 10. Fig. 2D illustrates also the handle 26 of the nozzle 14 and the hole 28 formed in the handle 26.

[0093] Furthermore, in Fig. 2E the piston 22 can be observed. The piston 22 has a front surface facing to the closed end of the foil tube 36, and a rear end which is configured so as that piston pushing plate can be engaged to the piston by the help of which the content of the cartridge can be pushed out through the opened - with cutting the top of the discharge element 18 - shoulder element 10 during its use.

[0094] It is noted in connection with the piston 22 that in Fig. 2E, there is no hole, but a front surface indentation 42 is formed on it for accommodating the closed end of the foil tube 36 with the closure clip 37. In this case the closed end of the foil tube 36 with the closure clip 37 can bend or pressed into the front surface indentation 42. However, alternatively, a hole can be formed in the front surface indentation 42 and the closed end of the foil tube 36 with the closure clip 37 can be pushed through the hole as shown in many of the figures, e.g. Figs. 1 B, 3A, 4A-4B.

[0095] Fig. 2E furthermore illustrates that lateral flanges 40 are formed on the lateral part of the piston 22 for leading the piston 22 in the inner space of the cartridge cover tube 12. Furthermore, a sealing 38 is formed on the piston 22 around its front surface (being an integrally formed portion of the piston 22 in this case). Fig. 3A shows a spatial-sectional view of a pre-assembled cartridge 15 corresponding to the first embodiment of the cartridge according to the invention. Fig. 3A shows similar details as Fig. 1 B, but in the view of Fig. 3A the pre-assembled cartridge 15 is empty, i.e. its storage space portion 51 is empty (in Fig. 1 B it is filled with the filler material 20), accordingly the shoulder element 10 is not arranged, thus the end ring 34 can be better observed and a storage space portion 51 can be observed (cf. Figs. 4A and 4B for the empty and filled state of the pre-assembled cartridge 15).

[0096] In Fig. 3A, namely it can be observed that the end ring 34 is inserted into a load end 17 of the pre-assembled cartridge 15 in such a way that it presses the open end of the foil tube 36 to the cartridge cover tube 12 from inside. It can be also observed that the collar of the end ring 34 abuts on the periphery of the cartridge cover tube 12 (namely on a load end edge 19 thereof).

[0097] Furthermore, it can be also observed in Fig. 3A that the foil tube 36 is closed at its closed end with the closure clip 37 in such a way that its material at the closed end is clamped / clipped by a small clamp / clip ring similarly as for the sausage insert of the prior art approaches, but the foil tube 36 of the first embodiment is only closed in one of its ends. Furthermore, Fig. 3A shows that the piston 22 is abutted onto the closed end of the foil tube in a way that the closed end with the closure clip 37 is inserted into the piston. In this position the piston 22 is ready to be pushed to discharge the content of the cartridge.

[0098] Fig. 3B shows the nozzle 14 in a spatial view in which details of the nozzle 14 can be observed, i.e. its handle 26 and the hole 28. The configuration of the nozzle 14 can be observed in many figures, it has an output part with gradually decreasing cross-section (the inner space of the output part has a slightly tapering configuration, and, furthermore, there are two steps in decreasing of its cross-section).

[0099] Figs. 3C-3E illustrate a first embodiment of the shoulder element according to the invention, namely the shoulder element 10.

[0100] Firstly, the shoulder element according to the invention is herebelow defined in general terms. The shoulder element according to the invention is for a cartridge. The shoulder element according to the invention - the various embodiments of which are illustrated in Figs. 3C-3E, 7A-7B, 29A-29C and 39A-42G - comprises

[0101] - a base portion having a discharge hole,

[0102] - a discharge element formed on the discharge hole (see e.g. Fig. 3D for a discharge element 18 and a discharge hole 31 ),

[0103] - a lateral portion being formed on a periphery of the base portion around the discharge element (as shown in the figures, the lateral portion starts in the same direction as the discharge element is formed on the discharge hole), and

[0104] - a collar portion extending outwards from the side portion (in other words, it may be said also that the collar portion is formed on the side portion in this extending manner).

[0105] It is noted that the base portion (may be also called simply base or bottom portion), lateral portion (may be also called side portion or simply side) and collar portion (may be called simply collar or rim / rim portion) for an embodiment are illustrated in the description of the respective embodiment. It can be also said that the shoulder element has - i.e. possesses - these portions (may be also called parts). Everywhere where it is written that an element is formed on the other element (as shown in the figures these are formed / made from a single piece; it is illustrated everywhere in the figures where e.g. two portions are made from a single piece), it could be also written that it is connected to the other.

[0106] It is noted that the shoulder element may also be called a closure / shoulder-closure element. It is noted, furthermore, that the discharge element on the discharge hole is configured similarly to prior art approaches (as can be observed in details in the figures; cartridges always have a discharge element); these may be also called as output element and output hole for the shoulder element.

[0107] The shoulder element according to the invention is adapted (in other words: configured to be suitable) for closing a pre-assembled cartridge (for pre-assembled cartridges 15, 115 to which the shoulder element can be applied, see Figs. 3A-4A and Figs. 23A and 24, respectively) corresponding to the cartridge (for which the shoulder element can be utilised; the pre-assembled cartridge is a part to be utilised also for manufacturing the cartridge, it may be considered as a preform for the cartridge),

[0108] - wherein the pre-assembled cartridge has a storage space portion for a filler material and an end ring being in a load end of the storage space portion of the pre-assembled cartridge (for the configuration and arrangement of an end ring 34, see e.g. Figs. 2A and 3A, which show how it is inserted into the foil tube 36 of the pre-assembled cartridge 15 according to its configuration with collar portion), and

[0109] - wherein the lateral portion and the collar portion are adapted for being fitted into the end ring of the load end and onto a load end edge of the load end, respectively (for end rings 34, 134, storage space portions 51 , 151 , load ends 17, 117 and load end edge 19, 119, see e.g. Figs. 3A and 23A, respectively; furthermore, e.g. in Fig. 1 B, the cartridge is filled with a filler material 20).

[0110] According to the above definition, the pre-assembled cartridge is, of course, not the part of the shoulder element, but the shoulder element is applicable for closing the pre-assembled cartridge.

[0111] Furthermore, the shoulder element according to the invention further comprises a snap arrangement for snapping on the end ring of the pre-assembled cartridge, the snap arrangement is formed on the periphery of the base portion (i.e. where the base portion and the lateral portion meets, on their connection line), extends outer than the lateral portion (in this respect, see the concept of base surface part of the lateral portion introduced at the description of Fig. 43C), wherein at least one air channel is formed for allowing air through the snap arrangement. In other words, it may be said also that the snap arrangement is formed on the side portion / base portion (or on their boundary) in this extending manner.

[0112] In an embodiment the snap arrangement is preferably constituted by a plurality of snap elements, wherein neighbouring snap elements are separated by a respective air channel. It is noted also in connection with the snap arrangement and the snap elements, as well as with the air channel for an embodiment are illustrated in the description of the respective embodiment. It is noted in connection with the above embodiment that the snap arrangement can configured in a different way than the snap elements. Namely, with a generalised snap element according to the followings are to be provided:

[0113] - the snapping on the end ring of the pre-assembled cartridge, and

[0114] - an air channel (air passage, airway, cutout, but it could also be a tunnel if it would be a closed channel) which allows somehow air through the snap arrangement.

[0115] Allowing air through the snap arrangement is interpreted as follows, based on the definition given above as well as the figures. The snap arrangement is configured so that it can snap on the end ring when the shoulder element is arranged at its destination place and the collar portion will abut on the edge of the load / open end of the pre-assembled cartridge then. It can be said that, for connection, the shoulder element has two outward extending rims, namely the collar portion and the snap arrangement, to between which it will hold the end ring when connected (this general statement is to be interpreted considering also the air channels causing that the snap arrangement has a more special configuration).

[0116] Accordingly, the collar portion and the snap arrangement are element which are configured to extend in such a way that is considered to be parallel-like. Thus, the snap arrangement is formed on the shoulder element so as its sections will extend parallelly to - i.e. in the same direction as - the collar portion. If the snap arrangement would be continuous along the periphery just like the illustrated collar portion it would separate two space parts when pressed circularly to a surface, i.e. when the snap arrangement is pressed to the (tube-shaped portion of the) end ring when the shoulder element is inserted into the pre-assembled cartridge. The airway channels constitute a passage between these space parts which can be defined also when the snap arrangement is not continuous.

[0117] In view of the above definition of the shoulder element according to the invention in general terms, the prior art cited in the introduction is hereby commented.

[0118] US 8,276,755 B2 applies some kind of air expulsion, but it is configured hugely different from the solution applied in the invention. In the invention, the expulsion of air is provided by the help of the shoulder element from the inner space of the cartridge all the way along the lateral portion of the shoulder element by the help of the air channels and the extending configuration of the snap elements which ensure to have a gap between the lateral portion of the shoulder element and the end ring during the insertion of the shoulder element, thus air can leave. On the contrary, in the approach of US 8,276,755 B2 only short gas expulsion groove sections are applied for the collar applied in that approach and the slant corner section is mentioned in this respect in the prior art document.

[0119] In connection with US 6,464,112 B2 it is noted that in the invention no foil is applied under the shoulder element, but in the invention the cartridge is to be opened on the discharge element.

[0120] Herebelow, the description of Figs. 3C-3E is given. Fig. 3C shows a spatial view of the shoulder element 10. Accordingly, the discharge element 18 can be observed with the thread on its side. Furthermore, the collar portion 30 and the lateral portion 33 are also observable in Fig. 3C. The collar portion 30 is connected circularly onto the lateral portion 33 which latter is tube-like. The collar portion 30 is a collar can be sat onto the lateral portion 33 (the configuration of the collar portion 30 can be understood based on the different views).

[0121] Furthermore, in Fig. 3C it is also shown that snap elements 35 are arranged on the lateral portion 33 (snap elements 35 can be better observed in Figs. 3D and 3E), The snap elements (alternatively, snapping elements) may be also called snap-fit elements to connect to the end ring 34 with a snap-fit joint.

[0122] If Fig. 3C and Fig. 2C are interpreted together, it can be understood that the shoulder element 10 has a plate-like configuration in which the discharge element 18 is arranged. The plate is formed such that it has a depth since it has a side which is constituted by the lateral portion 33 and a base which is constituted by a base portion 32 which can be observed in Fig. 3D (connected circularly to the lateral portion 33).

[0123] Fig. 3D shows the shoulder element 10 in a spatial bottom view in which it can be observed that a discharge hole 31 is formed in the base portion 32 (it is centralised but the centralisation of the discharge element and the corresponding discharge hole is not necessary). In this bottom view the snap elements 35 formed on the periphery of the base portion 32 can be better observed, and also that the neighbouring snap elements 35 are separated by respective air channels 44. Fig. 3D also shows how the collar portion 30 is connected to the lateral portion 33.

[0124] Fig. 3E shows a detail of Fig. 3D in which in the detail view of Fig. 3E the snap elements 35 can be clearly observed. The plurality of snap elements 35 constitute a snap arrangement 35’ around the base portion 32. It can be observed that the air channels 44 can be considered as interruptions in the snap arrangement 35’. Thus, the snap arrangement 35’ is a snap flange interrupted by the air channels 44 (the snap elements 35 can be considered to be snap flange portions). It is noted that these interruptions help also the insertion of the shoulder element into the preassembled cartridge what would be less easy to perform with a continuous snap flange. The separate snap elements deform easier, i.e. let themselves to deform, preferably in a resilient, elastic manner, i.e. these are more resistant against inelastic deformation than a ring-shaped snap arrangement would be (the interruptions help this).

[0125] Fig. 3E also illustrates that the present embodiment is such an embodiment (like the other illustrated embodiments) wherein the snap arrangement (and thus the snap elements) has a wedge-like configuration on the periphery of the base portion (i.e. it can be straight wedge if it is short, but bended along the periphery if longer, see the different configurations of the snap elements in the embodiments), wherein the wedge-like configuration

[0126] - having an end portion with an end surface facing the collar portion (the end surface is like a snapping edge of the snapping arrangement and snapping elements, which is directed to the collar portion, this end portion will snap onto the end ring with its end surface; the end surface faces the collar portion, i.e. configured such that see in the direction of the collar portion), extending farthest outer than the lateral portion, and

[0127] - having a side portion tapering from the end portion (i.e. according to the wedge- shaped configuration it has the largest extension at the end portion, which tapers at its parts - i.e. on the side portion - being further from the collar portion; since the end portion faces to the collar portion this can only taper in the direction being opposite to the direction of the collar portion). The edge of the end portion can be sharp or rounded (i.e. the edges of the wedge can be rounded), so the end portion itself extends farthest outer than the lateral portion and there is an end surface on it which faces the collar portion. “From the end portion” thus means - according to the definition of the end portion - that from the portion which can be rounded, thus the roundedness does not count to the tapering. Moreover, the tapering may be linear, but other tapering is also conceivable. The wedge-like configuration means that it has a (substantially, when it is rounded) wedge shape cross-section in a plane perpendicular to the periphery (at its point along it).

[0128] Accordingly, the snap arrangement and the snap elements have a wedge-like configuration in order to facilitate snap-fitting. In other words when the shoulder element 10 is inserted into the pre-assembled cartridge 15, the snap arrangement 35’ will be able to be pushed along the end ring 34 (cf. with Fig. 3A when it is at its place). The snap arrangement 35’ (i.e. the snap elements 35) will snap onto the inner edge of the end ring 34, i.e. the edge of end ring 34 which faces to the inner space - i.e. the storage space portion 51 - of the pre-assembled cartridge 15.

[0129] By the help of Fig. 3E it can be also understood, since in it also a small part of the collar portion 30 is visible that the end ring 34 will snap between the collar portion 30 and the snap arrangement 35’. It can be understood based on Fig. 3A that the tube-shaped portion (see above for the introduction of this, see also the description of Figs. 26A and 26B) of the end ring 34 will be snapped into between these which is parallel with the cartridge cover tube 12.

[0130] It is noted in connection with Fig. 3E that the air channel 44 can be clearly observed between two snap elements 35 of the snap arrangement 35’.

[0131] Figs. 4A and 4B illustrate filling of the pre-assembled cartridge 15 with a filler material 20. Accordingly, Fig. 4A shows the empty pre-assembled cartridge 15 in a sectional view. In this view the details of Fig. 3A can be observed in a slightly different view, we refer to details of the end ring 34 and the piston 22, as well as the connection of the closed end with the closure clip 37 into the piston 22. The fitting of the piston 22 into the cartridge cover tube 12 can be also observed in Figs. 4A and 4B. Furthermore, Fig. 4B illustrate that the filler material 20 is filled into the inner space (i.e. into the storage space portion) of the cartridge all the way to the load end 17 of the pre-assembled cartridge 15.

[0132] Figs. 5A-5D illustrate the insertion of the shoulder element, i.e. in this embodiment the shoulder element 10 into the filled pre-assembled cartridge 15. Fig. 5A illustrates the state when the shoulder element 10 is almost inserted. Accordingly, it can be observed in Fig. 5A that the shoulder element 10 fits tightly into the load end 17 of the pre-assembled cartridge 15 (see the other description also for the interpretation of these).

[0133] Based on Fig. 5A it can also be understood that the collar portion 30 of the shoulder element 10 will sit onto the load end edge 19 of the pre-assembled cartridge 15 (cf. Fig. 5C).

[0134] Fig. 5B illustrates an intermediate state when the shoulder element 10 is partly inserted into the pre-assembled cartridge 15, i.e. the lateral portion 33 of the shoulder element 10 has been pushed into the end ring 34 (which has a bare inner surface in this figure, according to Figs. 3C-3E the lateral portion 33 also has a bare outside surface).

[0135] Considering also Figs. 3C-3E, the followings are noted. By pushing the shoulder element 10 into the pre-assembled cartridge 15, first the snap elements 35 of the shoulder element 10 will be pushed into the space encompassed by the end ring 34, Fig. 5B shows such a state. In this state the air channels 44 formed between the snap elements 35 have the role that air can leave the inner space of the preassembled cartridge 15 through the air channels 44 as illustrated by arrows 11 in Fig. 5B. Since the air channels 44 are cut-outs in the snap arrangement 35’ the air can leave even if the snap elements 35 are deformed during the pushing of the shoulder element 10 into its final place.

[0136] Furthermore, since the snap elements 35 extend outer than the lateral portion 33 (in this way these snap elements 35 can have their function) there will be a void space - i.e. further airway for expelling air from the inner space of the cartridge - “upstream” the snap elements 35 and the air channels 44, between the lateral portion 33 of the shoulder element 10 and in the respective portion of the end ring 34 during the insertion of the shoulder element 10 (the snap elements keep a distance from the surface of the end ring 34 facing to the shoulder element 10 in this stage).

[0137] Accordingly, the air can leave during pushing inwards the shoulder element 10. As a result of pushing it, the final state of the shoulder element 10 illustrated in Fig. 5C can be reached. Fig. 5C illustrates that there is no air in between the filler material 20 and the portions of the shoulder element 10 close to the lateral portion 33.

[0138] The final status of the filled cartridge is illustrated also in Fig. 5D where the whole cartridge is shown. This final state is a ready-to-be-used state when the opening the end of the discharge element 18, connecting the nozzle 14 to the discharge element, and after that by pushing the piston 22 the filler material 20 can be discharged from the cartridge.

[0139] In accordance with the above description, the method according to the invention for manufacturing a cartridge, comprising the steps of

[0140] - filling, with a filler material (as the illustration of filling, see Fig. 4B with operational step S5, wherein also the filler material 20 is shown), a pre-assembled cartridge having a storage space portion for the filler material and an end ring being in a load end of the storage space portion (for pre-assembled cartridges 15, 115 with their details, see Figs. 3A and 4B as well as Fig. 23A, respectively), and

[0141] - closing the storage space portion of the pre-assembled cartridge with an embodiment of the shoulder element according to the invention by snapping the snap arrangement of the shoulder element on the end ring.

[0142] Figs. 5A-5C are referred for the illustration of closing, wherein operational steps S7a, S7b, S7c are illustrated, respectively, with

[0143] - starting the closing in the operational step S7a,

[0144] - being in the middle of closing in the operational step S7b: the snapping elements 35 snap elements of the shoulder element 10 are within the tube-shaped portion of the end ring, so in a pushed-in state and before snapping in,

[0145] - the cartridge is totally closed in the operational step S7c, wherein the snapping elements 35 snap elements of the shoulder element 10 are snapped in. Figs. 6A and 6B are sectional views of the first embodiment of the cartridge. In Fig. 6A similar state to that of Fig. 5D is illustrated also with arranging the nozzle 14. Fig. 6B shows a kind of “illustrative” state since when the shoulder element 10 is inserted into the pre-assembled cartridge and the piston 22 is at its place at the other end of the cartridge cover tube 12 and the closed foil tube 36 is intact, the filler material 20 should be in the inner space of the cartridge.

[0146] In Figs. 7A and 7B a further embodiment of the shoulder element, namely a shoulder element 50 is shown. The shoulder element 50 comprises a discharge element 58, which is according to Fig. 7B has an open end covered by a covering element 52 having also a tear flap 53 (tear portion). Beside the difference in the discharge element 58 the other parts of the shoulder element 50 are the same as the shoulder element 10. It is an advantage of this embodiment that the covering element 52 can be removed by hand.

[0147] In Fig. 8 the followings are illustrated. Fig. 8 shows that the piston 22 is pushed upwards, as a consequence of which the foil tube 36 closed by the closure clip 37 is pushed up into the upper part (a foil tube residual part 46 is obtained in this way), i.e. according to the illustration even until the shoulder element 10. So, in this state the filler material 20 has been discharged substantially fully via the nozzle 14 connected onto the shoulder element 10.

[0148] Fig. 8 illustrates also that respective elements of the cartridge are removed from the upper end of the cartridge cover tube 12. That is why the nozzle and other elements are tilted (see also for the details below).

[0149] The shape of the foil tube residual part 46 in this status also shows that the piston 22 deformed the foil tube 36 in such a way that it receives the shape of the front surface of the piston 22 from which status the elements are removed in Fig. 8.

[0150] As touched upon above, the following elements are removed in Fig. 8: the nozzle 14 along with the shoulder element 10, as well as the foil tube 36 deformed into the foil tube residual part 46. The remaining parts - i.e. the cartridge cover tube 12 and the piston 22 - are thus not contaminated since the filler material has been contained in the foil tube 36 is separated from these because the closed foil tube 36 has been arranged inside the cartridge cover tube 12 and the piston 22 has pushed the foil tube 36 closed by the closure 37.

[0151] Figs. 9A and 9B illustrate the removed top elements in a spatial-sectional view. In both Figs. 9A and 9B the foil tube residual part 46 can be observed. It is furthermore observable how the nozzle 14 is connected to the shoulder element 18, namely that it is screwed onto it in such a way that the handle 26 of the nozzle 14 is folded under to the nozzle 14 and the discharge element 18 goes through the hole 28 of the handle 26 and goes into the inner space of the nozzle 14.

[0152] According to the above Fig. 10 illustrates the not-contaminated components, i.e. the cartridge cover tube 12 and the piston 10.

[0153] Herebelow, some aspects are noted in connection with the first embodiment of the cartridge illustrated in Figs. 1A-10. The cartridge is preferably a sustainable silicone cartridge.

[0154] This embodiment of the invention includes a foil bag, which is non-sealed at the top, because in this embodiment we rather designed a lining / sheeting of the preferably cardboard cartridge, then a “sausage” insertion (insertation) which is non-sealed at the top (i.e. an insertable “sausage”, see Figs. 1 B and 3A, see the foil tube 36 in these figures). It is noted that in a non-limiting example, the sizes of the - preferably cardboard - cartridge cover tube 12 are D48,6 x 215 mm (i.e. diameter x length). These sizes can be applied as a non-limiting example also for the cartridge cover tube 112 of the third embodiment of the cartridge.

[0155] As can be seen in Fig. 4A, an inner lining is applied (cf. the foil tube 36, i.e., preferably the same alu - i.e. aluminium - foil as in the prior art sausage-in-bag - i.e. sausage-based - cartridges, but unfilled), which inner lining (pre-fill) is held (at the top) by a preferably plastic ring, thus it has its top opened.

[0156] As shown in Figs. 3A-3C, the cartridge is configured as a 3-part delivery unit comprising a shoulder, a nozzle, and a pre-assembled cartridge, preferably with a piston in the latter (three parts similarly to the prior art systems, since those have the cartridge, piston and nozzle in the set of the delivery unit). The cartridge is preassembled at the manufacturer. Figs. 4A-5D illustrate the filling and assembly process of the cartridge according to the invention. The first step of the filling process is sealant filling. As illustrated in Figs. 4A-4B, the sealant is filled into the pre-assembled cartridge 15 through the top open end with the plastic ring (cf. Fig. 4A where the pre-assembled cartridge 15 is shown in an unfilled state). The filling process is designed (to be) compatible with existing filling lines but in an upside-down (reversed) position (see below and Fig. 4B for the filled cartridge). The solution according to this embodiment thus requires only a minimal modification of the filling lines’ feeding systems.

[0157] In the second step of the filling process, as illustrated in Figs. 5A-5D, shoulder assembly is performed, i.e. , the shoulder is assembled with the filled cartridge. In respect to an existing filling line, it can assemble the shoulder in the approach of the invention instead of the piston. The existing filling lines fill the cartridge from the end in which the piston is inserted afterwards, i.e. the cartridge according to the invention which is to be filled at its top has to be taken there upside-down for filling and for connecting the shoulder element.

[0158] An issue that has to be addressed during this step is: what about the air remaining inside. As illustrated in Figs. 5B and 5C, as well as Figs. 3D and 3E, air ventilation during shoulder assembly is controlled by the help of the shoulder element according to the invention.

[0159] As it can be observed in Figs. 3D and 3E, the shoulder has an inclined underside surface around the discharge hole corresponding to the discharge element to guide the air in outside direction i.e. into the discharge element. Also, cut-outs as channels for air ventilation are formed along the circumference of the bottom surface; these cut-outs are made on a snap-fit joint (cf. snap arrangement 35’ and snap elements 35 in Fig. 3E).

[0160] As shown in Fig. 5B, as the shoulder is assembled with the filled pre-assembled cartridge 15, air is forced out from between the sealant and the underside surface of the shoulder, and air escapes at assembly. The remaining volume if air will be in the inner space of the discharge element similar to prior art systems (cf. Fig. 5C). The third step of the filling and assembly process is nozzle assembly. As the filling is executed (performed) upside-down, the cartridge needs to be turned (rotated by 180 degrees) to fit the nozzle assembly. In the existing filling lines the piston is assembled from one side and the nozzle is connected (via its handle) from the other side. Since the filling is done at the shoulder element (at the piston formerly in existing filling lines), so the cartridge is to be turned for arranging the nozzle.

[0161] Fig. 6A shows this embodiment of the cartridge according to the invention in a finished state, illustrating the configuration of the cartridge in a sectional view. As shown in the figure, the foil bag (insertion bag) is filled with sealant, the open end of the foil bag being held by the spout for foil (preferably plastic end ring), and the closed bottom end of the foil bag is pushed into the piston inserted into the cartridge. Into the open end (load end) of the cartridge the shoulder is joined as illustrated in Figs. 5A-5C. In Fig. 6A the nozzle is mounted on the shoulder with the help of a hole on its handle (tab) into which the discharge element can be inserted.

[0162] The outer material of the cartridge (i.e. the material of the cartridge cover tube) may be in an example (all exemplary material here and below are given only as a nonlimiting example) either rHDPE (recycled high-density polyethylene) or cardboard. The piston, the spout for foil (plastic ring), the shoulder, and the nozzle may be made also of rHDPE (the spout for foil may be made also of rPP - recycled polypropylene) in an example. In connection with the filled cartridge of Fig. 6A, we refer hereby to Fig. 1 A shows a spatial view of the assembled cartridge ready to be delivered.

[0163] As Figs. 7A and 7B illustrate, the cartridge according to the invention may optionally also be provided with an additional “comfy” feature (if required), namely, the shoulder may be induction-sealed with a covering element having a tear flap that can be tom off without any additional tool (there is no need to use a blade cutter).

[0164] An important feature of this embodiment of the cartridge according to the invention is that it can be easily disassembled for recycling after use (i.e. separation for recycling can be done easily). “One move” disassembly (see Fig. 8 showing how the nozzle and the shoulder can be removed from the cartridge by tilting the nozzle) enables sustainable waste management. The nozzle, the shoulder, the bag and the spout (plastic ring) will be contaminated after use and therefore these are not recyclable (for these parts, see Figs. 9A-9B). However, the cartridge body and the piston remain clean, and thus can be recycled (for these parts, see Fig. 10).

[0165] The illustrated embodiment (with cartridge cover tube made of cardboard) thus fulfils many of the objects of the invention, as it is composed out of recycled materials, is designed to be recyclable, and also looks sustainable (due to the preferred usage of cardboard). It can also be emptied as completely as possible (i.e. maximally) to reduce chemical waste, and, since it is compatible with existing filling lines, its production and filling processes are cost-effective.

[0166] Accordingly, the cartridge according to the invention (these and other embodiments) can be applied for a dispenser (discharge) gun. However, compatibility with cheap guns may remain an issue due to high friction between plastic (i.e., the material of the piston) and cardboard (the preferred material of the cartridge cover tube, i.e. outer tube of the cartridge) in this embodiment. This problem may aggravate further when an ultra-viscous sealant (which is close to be a solid material, such receipts exist) is received in the cartridge, it may lead to the malfunction of the piston (in addition to the uncomfortably high forces needed to operate the gun).

[0167] A solution can be given to this problem by dramatically reduce friction between the cartridge and the piston. This can be achieved by using plastic as the material of the cartridge cover tube. In this case, the compatibility with cheap guns may be better, however, the advantage of “sustainable look” provided by the cardboard material used in the embodiment described above is not present. It is thus noted that the advantage of applying cardboard in the cartridge cover tube is that it also looks sustainable, but using recyclable plastic is also considered to be sustainable.

[0168] Herebelow, some aspects of the assembly method (i.e. the manufacturing method) for a second embodiment of the cartridge - being very similar to the first embodiment thereof - are given with reference to Figs 11A-21A. This embodiment of the cartridge is preferably also a sustainable silicone cartridge.

[0169] Figs. 11A and 11 B illustrate the construction (configuration) of the second embodiment of cartridge according to the invention in a spatial-sectional view and in a spatial view, respectively (there are slight differences between the first and second embodiment of the cartridge, mainly in the piston).

[0170] In the second embodiment of the cartridge, a piston 62 is different in some details from the piston 22 of the first cartridge embodiment (see Fig. 12 and Figs. 20A and 20B for the details). Similar to Fig. 1 B of the first embodiment, the cartridge of Figs. 11A and 11 B has the cartridge cover tube 12, the shoulder element 10 and the nozzle 14 (being considered optional for a cartridge, if the concept of the cartridge is defined), and in Fig. 11 A the foil tube 36 being close at one of its ends (with other name foil bag) of the cartridge is filled with the filler material 20.

[0171] It is noted that in an example, the piston, the shoulder, the spout for foil (a preferably plastic end ring), and the nozzle are made of rHDPE (the spout for foil may be made also of rPP), while the cartridge itself can be made of either rHDPE or cardboard.

[0172] Fig. 11 C shows the pre-assembled cartridge in this embodiment in a spatial- sectional view. The configuration of the cartridge (having also the end ring 14) can be observed similar to Fig. 3A (see the storage space portion 51 ), but with the piston 62. The pre-assembled cartridge, the shoulder and the nozzle may be called together as the delivery units.

[0173] In Fig. 12 the components of a pre-assembled cartridge corresponding to the second embodiment of the cartridge are shown in a side view (i.e. the components of an empty cartridge without the shoulder element).

[0174] In Fig. 12 the piston 62 is illustrated at the bottom, which can be compared to the piston 22 shown in Fig. 2E. The main differences are the following. The piston 62 do not have flanges on its lateral part, but it also comprises a front-facing sealing element 71. Furthermore, considering also Fig. 11 A, the piston 62 - similar to the piston 22 - also has a front part which can accommodate the closed end with the closure clip 37 of the foil tube 36.

[0175] The configuration the main (base) portion body gives stiffness to the piston 62 (i.e. that there is a cylinder-like part which; this is to be guided in the cartridge). On the lateral portion of the main (base) portion there are longitudinal deepened grooves to decrease the friction with the cartridge (these are applied also on other pistons, e.g. on pistons 122, 222, see the long ones from the configuration on the side of those).

[0176] Furthermore, Fig. 12 shows the cartridge cover tube, the closed foil tube 36 with the closure clip 37, as well as in Fig. 12 it is shown (at the top) that the end ring 34 is provided with ribs 63 (small projecting rings on the circumference) on the lateral portion thereof (outer side of the tube-shape portion thereof).

[0177] In the followings, we will describe details of an embodiment with some variant in various steps of the manufacturing (assembly) method, and after that a fully detailed embodiment with the help of Figs. 13 and 14A-14B (and afterwards, yet further variants are given in Figs. 15A-21 B).

[0178] Preferably, in the course of manufacturing the pre-assembled cartridge

[0179] - the end ring is inserted into a first foil end of a foil tube (for the illustration of this step see operational step S92 in Fig. 14A), and

[0180] - the foil tube is arranged into a cartridge cover tube, wherein the end ring is arranged onto a first cover end of the cartridge cover tube (for the illustration of this step see operational step S98 in Fig. 14B), wherein the storage space portion is established (configured) in the foil tube (for the establishment of the storage space portion in the embodiment in which a partly closed foil tube is applied, see the next paragraph).

[0181] In the present embodiment, furthermore, for which the components shown in Fig. 12 correspond, the storage space portion is established by closing a second foil end of the foil tube before inserting the foil tube into a cartridge cover tube (for the illustration of this step see operational step S94 in Fig. 14A).

[0182] In the above embodiment, furthermore, preferably a piston is inserted into a second cover end of the cartridge cover tube, before inserting the foil tube into a cartridge cover tube (for the illustration of this step see operational step S96 in Fig. 14A, the piston 62 is arranged in the cartridge cover tube 12 than the foil tube 36 is arranged).

[0183] Moreover, in the above embodiment, preferably, after inserting the end ring into a first foil end of a foil tube, the end ring is welded to the foil tube (see Fig. 15D in this respect, it is noted that the welding is performed in this case before arranging the foil tube in the cartridge cover tube, see below for more details).

[0184] A fully detailed embodiment of the manufacturing method (assembly method) illustrated in Fig. 13 comprises the following steps (see also Fig. 14A and 14B for illustrating - on the top of the flowchart of Fig. 13 - with assembling the components; this fully detailed embodiment is within the embodiment defined in the paragraphs just before, but further details are introduced):

[0185] - In an operational step S90, foil tube production is performed from a sheet obtained from a foil reel by folding and welding.

[0186] - Thereafter plastic ring insertion and welding into the foil tube is performed in an operational step S92 (could be split into ‘a’ and ‘b’ substeps for insertion and welding, respectively).

[0187] - In a next operational step S94, closing the free end of foil is performed.

[0188] - Next, in operational step S96, piston insertion is performed into a cardboard cartridge cover tube.

[0189] - It is followed in an operational step S98 of putting / pu II ing the cardboard tube onto the pre-assembled foil.

[0190] - Finally, denoted as operational step S100, the pre-assembled cartridge is obtained.

[0191] In Fig. 13, in operational step S90 of the method (see its substeps S90a and S90b in Fig. 14A) a tube shape 72 is produced. In operational step S90a foil comes from reel in sheet / flat state which is folded into tube shape and fixed by welding process in operational step S90b. As can be seen in the figure, after being unwound from a foil reel 70, the flat foil is folded into tube shape and is welded along a welding edge 74 applying a welding tool 73 to produce a tube shape 72 (which can be the same if its length corresponds to the length of the foil tube 36).

[0192] Next in Fig. 13, operational step S92 of the assembly method (see also the respective step in Fig. 14A, wherein a first foil end 81 and a second foil end 83 are denoted), i.e., the insertion of the end ring 34 (it is preferably a plastic ring) into the foil tube 36 (that can be obtained from the tube shape 72, see also the description of Fig. 33 in respect of operational step S190b), can be carried out in various ways (these will be detailed below; it is noted that the inside diameter of the foil tube 36 is the same or smaller than the outside diameter of the plastic ring):

[0193] - by expanding the foil tube diameter (first option);

[0194] - by deformation of the shape of the end ring (i.e. by reducing the diameter of the end ring; second option);

[0195] - by slanted mounting / insertion of the end ring (third option);

[0196] - by means of high thread pitch thread on the outer side of the end ring for insertion (fourth option).

[0197] In the first option, the plastic ring is inserted into the foil tube by expanding the foil tube diameter (see Figs. 15A-15C represented in section, illustrating, respectively, the original foil tube 36 with the end ring 34, the process of expanding a foil neck 39, and inserting the (plastic) end ring 34 into the foil neck 39).

[0198] The neck diameter of foil tube 36 can be expanded because the foil can be stretched. After expanding the foil neck 39, the end ring 34 can be inserted into the tube easily. The wider, expanded foil neck 39 is created for example by a flexible, expandable core / tube of which an end is sliced / divided in axial (axis) direction into more sections or by a construction / device where a body / part with separated pieces (similar to a rounded fitting key / latch) ensure the expanded circular diameter by moving the separated pieces perpendicular to the axial direction.

[0199] This movement has two stages, where the first stage is the normal, non-expanded stage (the foil can move on it with original inside diameter) and the second stage is the expanded / expanding stage. After the expanding method, the expanded core / tube / construction (i.e. the tool) go into the first normal, non-expanded state (stage), while the foil diameter remains in the expanded, wider state, which ensures (provides) enough space for inserting the plastic ring.

[0200] As illustrated in Fig. 15D, optionally, the plastic ring (end ring 34) can be welded onto the foil neck 39 to ensure better holding, fixing and welding also provides air tight sealing between the end ring 34 and the foil tube 36 (in Fig. 15D it is illustrated that the plastic ring is welded onto the foil neck 39 by means of welding shapes 76). More types of welding technology can be used (hot stamping, induction- or ultrasonic welding etc.). It can happen after plastic ring insertion process, or after the whole assembly process when the pre-assembled cartridge has already been finished. In Fig. 12 ribs 63 of the end ring are shown, these help the welding of the foil tube 36 and the end ring 34.

[0201] In the second option, the plastic ring is inserted into the foil tube by deformation (i.e. , changing its shape) of the plastic ring. The steps corresponding to this option are illustrated in Figs. 16A-16E.

[0202] The diameter of the plastic ring can be decreased by deformation of its shape. At least 1 pcs. (i.e., one instance of) bending / indentation is needed for deformed V- shape, but it can be more (6, 8 pieces, etc.) smaller bends / indentations too. In this case, the smaller the plastic ring diameter, the easier to insert it into the foil. Welding process can be applied as it was mentioned at the first option, i.e. at the end of the process, when the end ring is at its intended place (see Fig. 15D).

[0203] Figs. 16A-16E illustrate the process of inserting the end ring, depicting, respectively,

[0204] - the plastic ring in its original state; see Fig. 16A, where the end ring 34 is illustrated above the open end of the foil tube 36;

[0205] - a way of deforming the plastic ring; see Fig. 16B, where it is shown that a bending 78 is applied which transforms the end ring 34 into a deformed end ring 34’;

[0206] - a way of inserting the deformed plastic ring into the foil tube; see Figs. 16C and 16D which shows the inserted state of the deformed end ring 34’ in a spatial view - similar to Figs. 16A and 16B - and in an upper view, respectively; and

[0207] - a state where the little lip (the bending produced by deforming) is pushed back to a non-deformed shape; see Fig. 16E, wherein the end ring 34 is inserted into the foil tube 36.

[0208] According to the third option is slanted mounting of plastic ring is applied for its insertion into the foil tube. The plastic ring can be inserted into the foil in a slanted or even (substantially) vertical state. In this case plastic ring will touch the foil only at two points / ”sections”; the foil can deform in this direction or the plastic ring can be compressed, too. The welding process can be performed as it was mentioned in the first option (see Fig. 15D).

[0209] Figs. 17A-17D illustrate the process, showing, respectively, - the plastic ring in a vertical / slanted state before insertion; see Fig. 17A, where the end ring 34 is illustrated above the foil tube 36;

[0210] - the insertion of the plastic ring into the foil tube; see Fig. 17B, where the end ring 34 is already inserted but it is in the same position as in Fig. 17A;

[0211] - the plastic ring as it inverts into the tube; see Fig. 17C illustrating that the end ring 34 is turned into the foil tube 36; and

[0212] - the inserted sample; see Fig. 17D, wherein the end ring 34 is in inserted position.

[0213] In the fourth option, the plastic ring is inserted into the foil tube by means of a high thread pitch thread, i.e., the plastic ring has a thread with high thread pitch and conical shape which will guide it during its insertion into the foil (it is preferably inserted by twisting according to the thread with high pitch). Furthermore, the high- pitch thread has the advantage that it will pull the plastic parts into the foil too. The welding process can be performed as it was mentioned above in relation to the first option (see Fig. 15D).

[0214] Figs. 18A-18B illustrate insertion process in sectional drawings, Fig. 18A depicting how the (plastic) end ring 34 having a thread with high pitch and conical shape is inserted by screwing it into the foil (with which it also deepens into it), and Fig. 18B showing the inserted sample. The welding process can be performed as it was mentioned above in relation to the first option (see Fig. 15D).

[0215] Figs. 19A-19B illustrate operational step S94 of the assembly method (with reference to Fig. 13, and also shown in Fig. 14A), i.e., closing the free end of the foil tube 36. Fig. 19A shows a state in which the foil end is opened. Fig. 19B illustrates closing of the foil end, which can be performed for example by crimping (i.e. the state of Fig. 19A will be followed by that of Fig. 19B). Closing the free end of the foil can also happen by folding and then welding (without a metal or plastic ring / piece / clip), or it can be closed by another components, even like a lid.

[0216] In Figs. 20A and 20B, two options of operational step S96 of the assembly method, i.e. of the piston insertion are shown (see also in Fig. 13 and last step of Fig. 14A). The insertion of the piston 62 can happen-as follows:

[0217] • in Fig. 20A from the top of the preferably cardboard cartridge cover tube 12, in which case it is needed to push the piston 62 through the tube till the bottom position. A base portion 67 of the body of the piston 62 will guide it into the cartridge cover tube 12. This is the preferred option for performing the process in this step.

[0218] • The piston 62 can also be inserted from the other side (see Fig. 20B) i.e. , through the bottom end of the cartridge cover tube 12, in which case it is not needed to push the piston 62 through the whole cartridge cover tube 12. In this case a sealing element (teeth) will reach first the cartridge cover tube 12.

[0219] • The piston 62 can be also inserted in a slanted position, as it has been mentioned in case of in the third option of the process for operational step S92 (slanted mounting of the plastic ring). This can make the insertion easier.

[0220] This step of the manufacturing (assembly) method can be an in-line or a stand-alone process, which means it can run parallel with or optionally after operational steps S90 (S90a and S90b), S92 and S94 of the method.

[0221] In Fig. 21 A operational step S98 is illustrated (see also Fig. 14B, wherein a first cover end 91 and a second cover end 93 are denoted) wherein the preferably cardboard cartridge cover tube is put / pulled onto the pre-assembled foil (the closed foil tube 36) to obtain the pre-assembled cartridge illustrated as operational step S100 in Fig. 14B (in sectional as well as in spatial view one above the other) and also in Fig. 21 B (cf. also with the last step of Fig. 13).

[0222] A third embodiment of the cartridge according to the invention is illustrated in Figs. 22A-38. In this embodiment the activation force of the cartridge is optimized. The cartridge is preferably a sustainable silicone cartridge also in this embodiment.

[0223] The goal of the development of this embodiment has been to preferably decrease the activation force - which is a force applied for operating - during the usage of the cartridge (the so-called system usage) compared to the first embodiment (see Figs. 1A-10, especially Figs. 1A and 4A, wherein the latter shows an empty bag in order to illustrate better the bag shape) and the similar second embodiment of the cartridge while keeping the benefits of those.

[0224] For the illustration of the third embodiment of the cartridge, see Figs. 22A and 22B, a sectional and a spatial view, respectively. In this embodiment a closed piston 122 (shortly, a piston 122 in the following) is placed in the foil (i.e. into a foil tube 136, see also Fig. 31 and operational step S192 of Fig. 33, wherein a first foil end 181 and a second foil end 183 are denoted) and touches the filler directly (i.e. the filler material, e.g. silicone or other sealant material contained therein). Fig. 22A shows an unfilled but already assembled cartridge (called also assembled system; during the assembly the shoulder is only connected when the cartridge, i.e. the preassembled cartridge is filled with filler material).

[0225] In Fig. 22A it can be observed that the cartridge comprises a - preferably cardboard - cartridge cover tube 112, a piston 122 (with a sealing 125 and a projecting portion 123), a shoulder element 110, a nozzle, an open sleeve foil (i.e. a second foil tube 136, wherein the second foil tube 136 is open at both of its ends, it could be also called an open foil / sleeve tube; it may be called foil tube 136 or open foil tube 136 in the followings), a spout for foil (alternatively called a sleeve holder for the first end or sleeve ring for the first end of the foil, i.e. an end ring 134), a sleeve holder (alternatively called a sleeve ring; i.e. an auxiliary end ring 165) for the second end of the foil (i.e. the foil tube 136), and a nozzle 14.

[0226] The piston 122, the nozzle 14, and the shoulder element 110 are made of rHDPE in an example. The sleeve holder for the second end can be made in the example either of rHDPE or rPP, and the spout for foil (end ring) can be made of rPP in the example (it is noted for all embodiments, that when the shoulder element is made of rHDPE and the end ring is made of rPP, then the shoulder element is softer than the end ring, i.e. the materials of these can be selected to achieve this).

[0227] It is noted that in a third embodiment of the invention employing an open sleeve, the configuration of the cartridge is preferably simpler than in the prior art approaches, and a manufacturing method for this simpler configuration is disclosed.

[0228] The third embodiment of the cartridge can be also seen in spatial Fig. 22B, where the cartridge cover tube 112 and the shoulder element 110 inserted thereto are shown, as well as the nozzle 14 arranged as connected to the discharge element 18 of the shoulder element 110. In Figs. 23A-23C, the components of the cartridge (may be also called delivery unit) are shown. Namely, in Fig. 23A a pre-assembled cartridge 115 in a sectional-spatial view with the piston 122, the foil tube 136 arranged in the cartridge cover tube 112, and the end ring 134 as well as the auxiliary end ring 165 at the ends of the cartridge cover tube 112 in Fig. 23A.

[0229] In Fig. 23A, furthermore, a storage space portion 151 can be observed, which a different kind of storage space portion than the storage space portion 51 in Fig. 3A, since the storage space portion 51 is formed in the foil tube closed by the closure on one of its ends, but the storage space portion 151 formed in foil tube 136 is closed at one of its ends by means of the piston 122 (after filling with the filler material 20, both embodiments are closed by the help of a shoulder element, namely by the shoulder element 10 and the shoulder element 110, respectively). See also Fig. 24 for the storage space portion 151 .

[0230] Fig. 23B and 23C show the nozzle 14 and the shoulder element 110 in spatial views, respectively.

[0231] Fig. 24 illustrates in sectional view the construction of the pre-assembled cartridge 115, the inner lining (i.e. the foil tube 136) is open at both sides (i.e. ends, top and bottom) and is held by the sleeve holders, i.e. the end ring 134 and the auxiliary end ring 165 for the first and second ends, respectively. Preferably, in an example, the inner lining is made of the same multilayer aluminium foil as a sausage (in conventional cartridges), but the pre-assembled cartridge 115 is unfilled.

[0232] The construction of the first end of the cartridge is shown in Fig. 25A (being a detail of Fig. 22A) and in a detailed view thereof in Fig. 25B with the end ring 134 (sleeve holder for the first end) and the shoulder element 110 arranged snapped therein. Furthermore, Figs. 26A-26B show spatial and sectional views of the end ring 134, wherein a collar portion 137 and a tube-shaped portion 139 (may be also called round-shaped portion, it has a shape of a short tube) of the end ring 134 can be observed (see ribs formed on the outer side of the tube-shaped portion 139; the auxiliary end ring 165 shown separately in Figs. 28A and 28B has also a collar portion 166 and a tube-shaped portion 167). Considering Fig. 25A and especially its detailed view in Fig. 25B, the foil tube 136 arranged within the cartridge cover tube 112, it is arranged between the tubeshaped portion 139 of the end ring 134 and the cartridge cover tube 112. The open sleeve (i.e. the foil tube 136) is preferably welded onto the side surface of the end ring 134 (i.e. the sleeve holder for the first end).

[0233] In Fig. 25B, the way of arrangement of the shoulder element 110 can be also observed. The shoulder element 110 is inserted (assembled) into the end ring 134 and is preferably connected to it by a snap-fit joint. In Fig. 25B, at the connection of the lower part of the end ring 134 to the shoulder element 110, a snap-fit connection between the end ring 134 and a snap element 135 of the shoulder element 110 can be observed. Moreover in Fig. 25A and 25B it is shown how the shoulder element 110 is inserted into the end ring 134, namely it is connected by the snap-fit connection at the lower part of the figure, the shoulder element 110 also touches the inner side of the tube-shaped portion 139 of the end ring 134, and it is also shown that a collar portion 130 of the shoulder element lies on the collar portion 137 of the end ring 134 (this latter is inserted onto the end part of the cartridge cover tube 112).

[0234] It is noted that in Figs. 25A and 25B the nozzle 14 as well as its handle 26 can be observed (see the handle 26 arranged on the collar portion 130 of the shoulder element 110 in Fig. 25B).

[0235] In Fig. 27 the detailed view of the construction of the second end of the preassembled cartridge 115 is shown. As well as, Figs. 28A and 28B show spatial and sectional views of the auxiliary end ring 165 (i.e. the sleeve holder for the second end), wherein a collar portion 166 and a tube-shaped portion 167 of the auxiliary end ring 165 can be observed (see ribs formed on the outer side of the tube-shaped portion 167).

[0236] The auxiliary end ring 165 is inserted (assembled) into the foil tube 136 (i.e. the open sleeve foil) which has already been assembled with - the preferably cardboard - cartridge cover tube 112. Welding the auxiliary end ring 165 into the foil tube 136 is optional, i.e., it is not required. Fig. 27 shows the auxiliary end ring 165 as inserted into the end (so-called second end) of the cartridge cover tube 112, with the foil tube 136 arranged therebetween. Fig. 27 shows that the auxiliary end ring 165 has ribs / lamels (lamellas, see also these in Figs. 28A-28B) for strict connection with the assembled cartridge cover tube 112 and foil tube 136 (open sleeve foil). The ribs / lamels can cut / push themselves into the side surface of the foil (of the foil tube 136) and the preferably applied cardboard (of the cartridge cover tube 112). In this way, the auxiliary end ring 165 (i.e. the sleeve holder for the second end) is fixed into the pre-assembled cardboard cartridge tube.

[0237] Figs. 29A-29C show the shoulder element 110 in spatial and two sectional views (the sectional views are shown as cutting the discharge element 18; for the description of shoulder element 110, see also Figs. 39A-39I).

[0238] The construction of the shoulder element 110 has been modified (designed so that) in order to make easier the production tool (see indentations 113 at both sides of the discharge element 18). Moreover, an additional thread-groove 141 (this can be considered to be a single groove, but this configuration can also be considered as grooves, since the thread-groove 141 is interrupted multiple times, see also below) for air ventilation are included on the side surface (this can also be observed in more detail in Figs. 39A-39I).

[0239] Moreover, Fig. 29B is a sectional-spatial view showing the same section as the sectional view of Fig. 37F, and Fig. 29C is a sectional-spatial view showing the same section as the sectional view of Fig. 39E. The arrangement of the indentations 113 can be clearly observed in Figs. 29B and 29C. For the description of the snap elements 135, as well as of the chambers 143 with respective reinforcement elements 147, see also Figs. 39A-39I.

[0240] In Figs. 30A-30B the piston 122 is shown in a spatial and a sectional view, respectively. The piston 122 builds up from two parts (main part with a cylindrical portion 127 for fitting into the cartridge cover tube 112 and with a top portion 121 for pushing the filler material, as well as a sealing element (ring) 125), but alternatively it can also be made from one single part. The piston 122 touches the filler material directly in the assembled cartridge in this embodiment. Thus, the top of the piston 122 - i.e. the top portion 121 - has to be closed.

[0241] In the followings the steps in an embodiment of the manufacturing method (assembly process) of the pre-assembled cartridge of the cartridge of the third embodiment will be described.

[0242] Fig. 31 shows the components of the pre-assembled cartridge separately, i.e., it depicts the end ring 134 (i.e. the sleeve holder for the first end), the piston 122, the foil tube 136 (i.e. the open sleeve foil), the (preferably cardboard) cartridge cover tube 112, and the auxiliary end ring 165 (i.e. the sleeve holder for the second end).

[0243] In the followings, we will describe details of an embodiment with some variant in various steps of the manufacturing (assembly) method, and after that a fully detailed embodiment with the help of Figs. 32 and 33 (and afterwards, yet further variants are introduced).

[0244] Preferably, in the course of manufacturing the pre-assembled cartridge

[0245] - the end ring is inserted into a first foil end of a foil tube (for the illustration of this step see operational step S192 in Fig. 33), and

[0246] - the foil tube is arranged into a cartridge cover tube, wherein the end ring is arranged onto a first cover end of the cartridge cover tube (for the illustration of this step see operational step S194 in Fig. 33), wherein the storage space portion is established in the foil tube.

[0247] Furthermore, preferably, after inserting the end ring into a first foil end of a foil tube, the end ring is welded to the foil tube (we refer to Fig. 15D in this respect, it is noted the welding is preferably performed in this case to the foil through the cartridge cover tube, after the foil tube is arranged in it, see below for more details).

[0248] Accordingly, the above two section may be applied, beside the embodiment with closed foil tube, for the pre-assembled cartridge of the open foil tube embodiment (for the establishment of the storage space portion in the embodiment in which an open foil tube is applied, see the next paragraph). In the present embodiment, after the foil tube is inserted into the cartridge cover tube (i.e. after the operational step S194 in the illustration), an auxiliary end ring is inserted into a second foil end of the foil tube (for the illustration of this step see operational step S198 in Fig. 33, wherein an auxiliary end ring 165 is shown), wherein the auxiliary end ring is arranged onto a second cover end of the cartridge cover tube, and the storage space portion is established by inserting a closed piston into the foil tube being inserted into the cartridge cover tube. It is noted that, herebelow, the steps necessary for manufacturing the pre-assembled cartridge are detailed, in this embodiment - since the foil tube will be left open - the arrangement of a closed piston is necessary in the pre-assembled cartridge to have a storage space portion closed at that end and open only at the other end, i.e. at the load end (in the above illustrated embodiment, where the closed foil tube 36 was applied, the arrangement of the piston is not necessary for establishing the storage space portion, since this is only opened at the load end).

[0249] In Figs. 32 and 33 the steps of a fully detailed embodiment of the manufacturing method are shown in a flowchart, as well as by the help of figures with the components (this fully detailed embodiment is within the embodiment defined in the paragraphs just before, but further details are introduced).

[0250] In Fig. 32 in operational step S190 (see also detailed in operational steps S190a and S190b in Fig. 33), open foil sleeve production is performed (the foil tube 136 is produced after being unwound from a foil reel 170) from foil sheet material by folding, welding, and cutting as detailed below.

[0251] In the first subfigure of Fig. 33, it is shown in connection with producing the foil tube 136 that in operational step S 190a foil comes from a foil reel in sheet / flat state which, in operational step S190b will be folded into a tube shape 172 and fixed by a welding process with a welding edge 174 applied by a welding tool 173 arranged above the tube shape 172, afterwards cutting process can be applied at both ends of the tube shape 172, i.e. the separate foil tubes 136 can be produced by cutting (every time one is cut from the tube shape 172), if cutting is needed (the tube shape 172 can be also of a length of a foil tube 136). Thereafter, in operational step S192 in Fig. 33, the end ring 134 (i.e. the sleeve holder) for the first end and the piston 122 are inserted into the foil tube 136, and the end ring 134 is preferably welded into the foil tube 136 (i.e. open foil sleeve; of. S194 in Fig. 33 where the end ring 134 is already inserted, i.e. connected or preferably welded into the foil tube 136). The operational step S 192 is also illustrated in Fig. 33, wherein it is shown that the piston 122 and the end ring 134 are inserted into an expanded part 136’ of the foil tube.

[0252] In operational step S194, putting / pulling of the preferably cardboard cartridge cover tube 112 onto the pre-assembled foil is performed, i.e. the cartridge cover tube 112 is put / pulled onto the foil tube 136 as prepared in operational step S192 of Fig. 33 (see operational step S194 also in Fig. 33, where the cartridge cover tube 112 is arranged on the foil tube 136).

[0253] Operational step S194 is followed by moving the piston 122 down (i.e., towards the second end) in operational step S196 (see this in Fig. 33, wherein the piston 122 is moved from the end ring 134 to the other end of the cartridge cover tube 112).

[0254] Then, in operational step S198 the auxiliary end ring 165 (i.e. sleeve holder) for the second end is assembled into the pre-assembled (preferably cardboard) cartridge cover tube 112 (see Fig. 33, wherein the auxiliary end ring 165 is inserted into the second end, where also the piston 122 is arranged).

[0255] As the result of the above operational steps, the pre-assembled cartridge is obtained, which is denoted in operational step S200 in Fig. 32 (it is a result in operational step S198).

[0256] Figs. 34A-34D illustrate in more detail the manner of inserting the end ring 134 (sleeve holder for the first end) and the piston 122 into the foil tube 136 (open foil sleeve), i.e. performing of operational step S192 of the manufacturing (assembly) method. The inside diameter of the foil tube 136 (foil sleeve) is preferably the same or slightly smaller than the outside diameter of the piston 122. Accordingly, the insertion is made by expanding the diameter of the foil tube 136.

[0257] In Fig. 34A, the original open foil sleeve, i.e. the original foil tube 136 is shown. In

[0258] Fig. 34B expanding of the neck of the foil tube 136 is shown (i.e. the expanded part 136’ of the foil tube 136 is obtained). Then, the end ring 134 and the piston 122 are inserted into the foil neck, i.e. into the expanded part 136’ (the end ring 134 hides the top part of the piston 122); Fig. 34C shows a starting state as well as Fig. 34D shows an end state of the insertion. Afterwards, the end ring 134 is optionally welded into the foil neck, i.e. into the expanded part 136’.

[0259] In operational step S194 of the method, the - preferably cardboard - cartridge cover tube 112 is put / pulled onto the pre-assembled foil (i.e. the foil tube 136 with the piston 122 and the end ring 134, shown at the end of the foil tube 136) as shown in Fig. 35, wherein a first cover end 191 and a second cover end 193 are denoted.

[0260] Figs. 36A and 36B show spatial and sectional views of a first stage of assembling of the cartridge (may also be called a first state pre-assembled cartridge) - i.e. the cartridge cover tube 112 and the foil tube 136 inserted into it by the end ring 134, as well as the piston arranged in it - obtained after operational step S194.

[0261] In Fig. 37 the piston 122 is moved down (i.e. to the other end of the cartridge cover tube 112), and insertion of the auxiliary end ring 165 into the foil sleeve, i.e. into the foil tube 136 arranged in the cartridge cover tube 112 is illustrated. Here, the task is the same as with the insertion of the end ring 134 (sleeve holder) for the first end, i.e., the inside diameter of foil tube 136 (foil sleeve) is the same or smaller than the outside diameter of piston.

[0262] The insertion process can be performed according to the following options (adding that here the foil tube 136 is arranged in the cartridge cover tube 112 and the insertion is to be done in this state, furthermore, it is noted that the welding process can be applied through the cartridge cover tube 112 when made of cardboard, cf. Fig. 15D):

[0263] • by expanding the diameter of the foil tube 136 (similarly as shown in Fig. 34B, cf. Figs. 15A-15C, in this case expanding of the foil tube is performed within the cartridge cover tube; it can be supported from outside when expanded or can be simply expanded from inside without support),

[0264] • by deforming the auxiliary end ring 165 (to a Q shape, i.e., reduce the diameter of the auxiliary end ring 165 by deformation; cf. Figs. 16A-16E and reference is also made to their description), • by slanted mounting / insertion of the auxiliary end ring 165 (cf. Figs. 17A-17D and reference is also made to their description), or

[0265] • by applying high thread pitch thread on the outer side of the auxiliary end ring for insertion (cf. Figs. 18A-18B and reference is also made to their description).

[0266] Fig. 38 show a spatial view of the pre-assembled cartridge 115 (see this state also in Fig. 23A, may be called also a second state of assembling of the cartridge).

[0267] In Figs. 39A-39I the second embodiment of the shoulder element, namely the shoulder element 110 is illustrated in different views and sections. This embodiment corresponds to the third embodiment of the cartridge; accordingly, the shoulder element 110 has already been shown in Figs. 29A-29C and in other figures of the third embodiment of the cartridge, as inserted into the cartridge.

[0268] Fig. 39A shows a spatial upper view of the shoulder element 110, in which figure it can be observed that the shoulder element 110 has a collar portion 130 which is arranged on a lateral portion 133.

[0269] In Fig. 39A it can be seen that the shoulder element 110 comprises a discharge element 18 arranged centrally on a top portion of the shoulder element 110, on a flat top part thereof. Besides the flat top part of the top portion approximately with a half circle cross section two indentations 113 are formed. A substantially spiral thread-groove 141 is thus formed as a thread on the lateral portion 133 (see more details below, especially at Fig. 39C).

[0270] It is noted with emphasis that this thread-groove (or simply groove) does not play the role of a groove for screwing, since the shoulder element is always pushed into the pre-assembled cartridge, no twisting or screwing movement is applied on it. The thread-groove only has a role in expelling of air (for this, see also below). That is why it is called a thread-groove and not a screw thread, however it could be called in this latter way also. These are true also for the thread-projections introduced below, those are also not for screwing but for facilitating expelling of air.

[0271] As illustrated already in Fig. 29A, chambers 143 opening to opposite parts of the lateral portion 133 are formed under the flat top part of the top portion because of constructional reasons. The thread-groove 141 partly goes through the side of the chambers 143 being at the lateral portion (as an elongation thereof), this is constituted by a portion of the thread-groove 141 formed on a reinforcement element 147 of the chamber 143. Furthermore in Fig. 39A snap elements 135 can be observed.

[0272] In Fig. 39B a bottom view of the shoulder element 110 is shown. In this view base portion 132 can be observed, as well as the collar portion 130 which extend circularly outer than the base portion 132. Also snap elements 135 and air channels 144 between them can be observed in this view.

[0273] Fig. 39C shows the shoulder element 110 in a side view, which helps to observe many details such as the chamber 143 as well as the thread-groove 141 (this a substantially spiral groove since it has interruptions at the chambers 143 - i.e. it may be called a groove with respective interruptions at the chambers -, but having a portion on a reinforcement element 147 also). It can be observed that the discharge element 18 extends through the body of the shoulder element 110 until reaching the base portion 132. In the side view also the lateral portion 133 as well as the snap elements 135 arranged at the bottom of lateral portion 133 can be seen.

[0274] In Fig. 39D the shoulder element 110 is shown in a bottom-spatial view in which some details can be better observed. Fig. 39D shows that the base portion 132 has a special structure having a separate lower part around the discharge hole 31 , the configuration of which can be understood based on comparison with Fig. 39C which illustrates the configuration of the base portion 132 with a central base part having different height (the snap element 135 is on the periphery of the central base part).

[0275] Furthermore in Fig. 39D the snap elements 135 at the two ends of this central base part around the discharge hole 31 can be observed and also other snap elements 135 on the circumference of the base portion 132 can be seen. The arrangement of the collar portion 130 as well as the chamber 143 and the thread-groove 141 on the lateral portion 133 can be observed.

[0276] Fig. 39E shows a further view which is a sectional view on a section made through the centre (peak) of the discharge element 18 (similar section has been shown in Fig. 29C). In this view the indentations 113 at the two sides of the discharge element 18 can be observed and also the configuration of the base portion 132 can be seen, as well as the snap element 135 are denoted at the centre and on the lateral portion 133 the configuration of the thread-groove 141 can be observed since the cut-outs of the thread-groove 141 can be observed on different heights on the lateral portion 133.

[0277] Fig. 39F shows a further section through the discharge element 18 in which the chambers 143 on the two sides of the discharge element 18 can be observed. This view illustrates that the chambers 143 are opened from two opposite sides of the shoulder element 110 but closed at the discharge element 18 (cf. Fig. 39E which shows a section perpendicular to the section of Fig. 39F and shows a wall around the discharge element 18).

[0278] A similar section to that of Fig. 39F has been shown in Fig. 29B. In the cross section of Fig. 39F the line of the base portion 132 observable from the central different height area can be observed at the bottom part of the figure, as well as the snap elements 135 can be observed at the side of the bottom part. Because of the chambers 143 the lateral portion is void (interrupted) at this part but the “line” of the lateral portion can be observed also in Fig. 39F since the collar portion 130 extends more than the reinforcement element 147 on which the thread-groove 141 is formed.

[0279] Similar to all embodiments of the shoulder element according to the invention, the shoulder element 110 is to be inserted into the pre-assembled also by pushing it into it. Thus, no twisting movement is required, the thread-groove 141 plays a role of an airway on the lateral portion 133 (as noted above, this is also true for other embodiments: this is illustrated for the shoulder element 10 in Figs. 5A-5C, and pushing is to be applied for insertion also for shoulder elements 210, 310 and 410).

[0280] Furthermore in Fig. 39G the shoulder element 110 is shown in an upper view with the discharge element 18 in the central flat part and also the indentations 113 as well as the collar portion 130 can be observed.

[0281] Fig. 39H shows a similar view as Fig. 39D, but the shoulder element 110 is tilted differently in order that the snap elements 135 can be better observed. Also, the lateral portion 133 with the thread-groove 141 as well as the collar portion 130 can be observed clearly.

[0282] In Fig. 39I detailed view of a part of Fig. 39H can be observed for better illustration of some configuration details. In this view the step elements 135 composing a snap arrangement 135’ can be clearly observed with air channels 144 formed between them (cf. Fig. 39H which illustrates that there is a slightly different configuration for the air channel 144 at the different height a portion of the base portion 132 around the discharge hole 31 then in between two other step elements 135 around the other part of the base portion 132).

[0283] Furthermore, in Fig. 39I the lateral portion 133 can be observed more clearly as well as the thread-groove 141 . Fig. 39I shows very clearly that the thread-groove 141 is deepened into the lateral portion 133.

[0284] Fig. 40A shows a further (third) embodiment of the shoulder element according to the invention, namely a shoulder element 210 in a spatial view. It can be observed in Fig 40A that the shoulder element 210 has a collar portion 230, a lateral portion 233, as well as snap elements 235. Furthermore, the discharge element 18 can be observed in Fig. 40A centrally arranged in the shoulder element 210.

[0285] It is shown in Fig. 40A that the discharge element 18 is deepened into a space part which is encompassed by the collar portion 230 and the lateral portion 233, and thus an indented space portion 263 is constituted which is divided into parts by reinforcement elements 261 running inserted between the collar portion 230 and a basement of discharge element 18, thus have a lowering configuration in the direction of the discharge element 18.

[0286] In Fig. 40A it can be also observed that spacer members 267 are arranged at the snap elements 235 (between the snap elements 235 and the collar portion 230 on the side of the shoulder element 210), these are formed to touch the end ring 34 or end ring 134 when the shoulder element 210 is inserted into the pre-assembled cartridge (see also the description of Fig. 40C).

[0287] In Fig. 40A, also directing members 271 (positioning ribs) are shown formed on some of the snap elements 235 (extending outwards from these in a direction being perpendicular to the base of the shoulder element 210; of. with the base portion 232, see below) in order to help to achieve better positioning and centering for the shoulder element 210 when it is inserted into the load end (open end) of the preassembled cartridge (the directing members will be inserted first into between the end ring of the pre-assembled cartridge).

[0288] In Fig. 40B the shoulder element 210 is shown in a bottom view accordingly the base portion 232 thereof can be observed, as well as the collar portion 230 around it. The snap elements 235 as well as air channels 244 can be observed both in Figs. 40A and 40B as well as the directing members 271 in some of the snap elements 235, namely four directing members 271 are formed in the illustrated embodiment. Furthermore, a discharge hole 31 corresponding to the discharge element 18 can be observed in Fig. 40B.

[0289] Fig. 40C shows the shoulder element 210 in a side view. In this view further details of the configuration can be observed. Because of the view, the lateral portion 233 can be clearly seen from the top to the bottom. In Fig. 40C a first flange 279 and a second flange 277 formed on the lateral portion 233 can be observed as well as first air channels 283 and second air channels 281 which are formed on them, respectively.

[0290] Below the flange 277 in respect of Fig. 40C, a deepened zone 273 (it is like a cutout on the lateral portion 233) formed circularly on the lateral portion 233 of the shoulder element 210 can be observed. This is formed between the flange 277 and the snap elements 235.

[0291] The deepened zone 273 is configured to let to flow the filler material around the shoulder element 210 like a film layer to seal. This film layer around the shoulder element 210 will become hardened by time and small hardened „ears” will develop at the air channels 244 which do not grow further. This configuration has a result according to our experiment that no hardened area developed under the skirt area (under those, i.e. encompassed by the snap elements 235) of the shoulder element 210 after the experiment time, thus this configuration caused a controlled hardening to prevent start hardening in the main part of the storage space portion of the filler material. The lateral portion 233 is configured so that the air can be expelled fast and the filler material can enter into the deepened zone 273 without the need of applying to large pressure for inserting the shoulder element 210. The air channels 281 , 283 (may be also called interruptions) formed in the flanges 277 and 279 so that these are turned circumferentially compared to each other (in the illustrated case, an air channel is arranged at the half way of two air channels on the other flange, see Fig. 40C). This configuration of air channels 281 , 283 increases the length of the way of the air and filler material when expelled during insertion (air is expelled next to the collar portion 230 at the end of its way).

[0292] Our experiments showed that the air can be expelled effectively and the filler material will preferably pass from below only the lower flange 277 (from the base portion 232 of the shoulder element 210), but since there is only a very thin gap between the lateral portion 233 and the end ring a choke caused to prevent the filler material to flow further, and also the upper flange 279 is still there (it can also be passed by the filler material).

[0293] It can be observed in Fig. 40C that the spacer members 267 give somehow the continuation of the lateral portion 233 (in respect of the width of the shoulder element 210 at that part), thus give a larger extension emerging from the deepened zone 273. Since the spacer members 267 are configured to touch the end ring of the preassembled cartridge when the shoulder element 210 is inserted into it, Fig. 40C helps to interpret that the snap elements 235 extend outer than the lateral portion 233 in order to be snapped onto the end ring. Thus, the spacer members 267 help the snap elements 235 to fulfil their functions, since without the application of the spacer members 267, it could happen that the shoulder element would „shift” in a side direction and the snap element would not snap onto the end ring on the opposite part of the lateral portion. Accordingly, the spacer members 267 have a circular supporting function.

[0294] Furthermore, air channels 244 as well as the directing members 271 can be observed also in the view of Fig. 40C.

[0295] Fig. 40D shows a bottom view of shoulder element 210 in which the snap elements

[0296] 235 can be clearly observed. The base portion 232 with the discharge hole 31 can be observed. It is shown also that a tapering opening portion is formed for the discharge hole 31 (see also Fig. 40E in this respect).

[0297] In Fig. 40E cross section of the shoulder element 210 is shown, namely such a cross section which goes through two reinforcement elements 261 arranged opposite (and the centre / peak of the discharge element 18). Furthermore, cross section made on a section not going through the reinforcement elements 261 (but goes through the centre / peak of the discharge element 18) is shown in Fig. 40F. Accordingly, these two views can be compared to each other. According to the sectional view the flanges 277 and 279 can be observed in both cross sections of Figs. 40E and 40F, as well as the configuration of the deepened zone 273 can be observed, namely that it is bordered from the bottom by a respective snap element 235 and spacer member 267 at the two sides in Fig. 40E, but in the different cross section of Fig. 40F the deepened zone 273 is not bordered from the bottom at the right side of the figure (since no snap element 235 is sectioned at this cross-section, but the crosssection is at an air channel 244 here; the spacer member 267 and the snap elements 235 can be observed in the background in this cross-section).

[0298] The deepened configuration of the discharge element 18 can be observed also in Figs. 40E and 40F. This configuration results in that the top of the discharge element 18 - where it is to be opened - is much closer to the base portion 232 than in many of other embodiments. Accordingly, in this embodiment the discharge element 18 is arranged deepened into within the lateral portion 233 and the discharge element 18 is formed on the discharge hole 31 via a narrowing introductory part 257 configured in such a way that the top of the narrowing introductory part 257 is at substantially at the same distance from the farthest (lowest) part of the base portion 232 as the top of the snap elements 235. This configuration will result in avoiding a big air gap at the discharge element 18, i.e. a relatively small air gap is achieved there in this embodiment. Thus, this configuration helps to prevent hardening of the filler material under the discharge element 18.

[0299] It can be also observed in Figs. 40E and 40F that from the discharge hole, i.e. from the narrowing introductory part 257 in the direction of the lateral portion 233, the base portion has a slightly inclined configuration such that the base portion 232 has a largest extension from the other portions at the side of the narrowing introductory part. This results in that during the insertion of the shoulder element 210 into a preassembled cartridge the air and after that the filler material will be directed along the base portion 232 into the direction of the lateral portion (this feature can be also observed for shoulder element 10 in Figs. 5A-5C and in another embodiment with similar base portion configuration).

[0300] Fig. 40G shows the shoulder element 210 from above in a top view, in which view the indented space portion 263 as well as the reinforcement elements 261 can be clearly observed, as well as the discharge element 18 and the collar portion 230.

[0301] Fig. 40H shows the shoulder element 210 in such a spatial view in which the snap elements 235 can be observed well. Along with Fig. 40I also the configuration of the flanges 277 and 279 with air channels 281 and 283 can be observed.

[0302] In Fig. 40I it is denoted that the plurality of snap elements 235 arranged around the base portion 232 constitute together a snap arrangement 235’. Air channels 244 between the neighbouring snap elements 235 can be seen also in Figs. 40H and 40I. It can be observed that the first width of each of the air channels 244 on the periphery of the shoulder element 210 are almost the same as the second width of each of the snap elements 235. Accordingly, the snap elements 235 of course can fulfil their function and also the air channels 244 can lead air out and also let the filler material into the deepened zone 273. During the insertion of the shoulder element 210 air can leave from the deepened zone 273 further via air channels 281 and 283 to the outside space (i.e. out from the cartridge).

[0303] In Fig. 40I these features can be observed in a detailed view, thus the wedge-like configuration of the snap elements 235 can be observed and also the spacer members 267 arranged along the respective snap elements 235 extending into the deepened zone 273 (the spacer members 267 are rectangle-based bodies with a height in the side / radial direction - from the centre of the shoulder element - smaller than the extension of the snap elements 235 in this direction). The configuration of the flanges 277 and 279 are noted in F ig.40I wherein the air channels 281 and 283 formed thereon can be observed in detail. These air channels 281 , 283 are much smaller in size compared to the air channels 244. Figs. 41 A-411 show a further (fourth) embodiment of the shoulder element, namely a shoulder element 310. This embodiment shows similarities with the previous embodiments, e.g. the configuration of reinforcement elements 361 and indented space portion 363 is similar to the respective components of the shoulder element 210, but in the shoulder element 310 the discharge element 18 is not deepened into the indented space portion 363.

[0304] In Fig. 41 A a collar portion 330 and a lateral portion 333 with a thread-projection 341 can be also observed (this is a full thread-projection, since no chambers are formed in this embodiment and, thus, this thread-projection has not got interruptions), as well as the snap elements 335 on the periphery of the base of the shoulder element 310.

[0305] In Fig. 41 B the bottom view of the shoulder element 310 can be seen. Accordingly, a base portion 332 can be observed, as well as the snap elements 335 with air channels 344 between the neighbouring of these and a discharge hole 31 .

[0306] In Fig. 41 C a side view of the shoulder element 310 is shown. In this view the threadprojection 341 on the lateral portion 333 can be observed well. Accordingly, this thread is formed as an out-projecting feature projecting out less than the snap elements 235. Also, the snap elements 335 with air channels 344 between them can be observed.

[0307] In Fig. 41 D a further spatial view from the bottom can be observed with the base portion 332 and the snap elements 335, the airway channels 344 and the threadprojection 341 on the lateral portion 333.

[0308] In Figs. 41 E and 41 F two different cross-sections via the discharge element 18 are shown. The cross-section of Fig. 41 E goes through reinforcement elements 361 , as well as the cross-section of Fig. 41 F avoids the reinforcement elements 361 showing a chamber of the indented space portion 363. In the cross-sections the configuration of the lateral portion 333 can be observed clearly with the thread-projection 341 with its spiral form as well as the snap elements 335 projecting out from the lateral portion 333. Fig. 41 G shows the shoulder element 310 from an upper view with reinforcement elements 361 and also the chambers of the indented space portion 363 can be observed. It is preferred to apply the reinforcement elements 261 in the shoulder element 210 and the reinforcement elements 361 in the present embodiment to achieve as minimal deformation for the base portions 232 and 332 and the lateral portions 233 and 333 as possible (this help to maintain the snap elements 235 and 335 in their snapped-in status); the deformations are in connection with the symmetry (cf. with indentations 113 and 413 applied in the shoulder elements 110 and 410, respectively).

[0309] In Fig. 41 H a further view of the shoulder element 310 is shown in which the snap elements 335 and the airway channels 344 between them can be observed clearly. Furthermore, Fig. 411 shows a detailed view of Fig. 41 H.

[0310] In Fig. 411 a snap arrangement 335’ of the snap elements 335 is denoted. It can be observed in both of Figs. 41 H and 411 that the snap elements 335 with interruptions of air channels 344 are arranged in an ordered way along the circumference of the base portion 332, i.e. the spacings between the snap elements 335 - which are the air channels 344 - are all of the same width on the circumference, just like the snap elements 335.

[0311] Furthermore, in Fig. 411 the configuration of the spiral form thread-projection 341 on the lateral portion 333 can be observed well.

[0312] In Figs. 42A-42G a further (fifth) embodiment of the shoulder element is illustrated, namely a shoulder element 410. This embodiment is similar to the embodiment illustrated in Figs. 39A-39I with only slight differences in the configuration. Accordingly, the shoulder element 410 also has indentations 413 and also chamber 443 formed in a central part of the shoulder element between the indentations 413. The chamber 443 has reinforcement elements 415 which are perpendicular to the top portion of the shoulder element 410 (see also Fig. 42D) as well as a reinforcement element 447 which goes with a thread-projection 441 (may be called also simply projection). In Fig. 42A also a collar portion 430, a lateral portion 433 with a spiral form threadprojection 441 is shown. It is noted that Figs. 42A-42G illustrate that the threadprojection 441 - similarly to the thread-groove 141 in Figs. 39A-39I - in a substantially spiral thread-projection 441 with interruptions (below and under the reinforcement element 447) at the chambers 443, but having a portion on a reinforcement element 447 also.

[0313] In Fig. 42A also the snap elements 435 with air channels 444 between them can be observed.

[0314] In Fig. 42B also a base portion 432 is shown in a bottom view, as well as the snap elements 435 with air channels 444 between them can be observed.

[0315] In Fig. 42C side view of the shoulder element 410 is shown. In this view, which is similar to Fig. 39C, it can be seen how the thread-projections 441 are formed in the lateral portion 433. Also, it can be seen that the snap elements 435 are larger than the snap elements 135 applied in the embodiments of Figs. 39A-39I. If Fig. 42C the inner space of the chamber 443 is also observable. In this inner space the reinforcement elements 415 (with two lines per piece, since their thickenings, cf. Fig. 42A), around these three centred double lines, the line corresponding to the edge of the connection portion formed between the discharge element 18 and the discharge hole 31 can be seen. This connection portion is connected with a wall portion to the parts on both sides in which the indentations 413 are formed (similarly as shown in the similar embodiment of the shoulder element 110 in Fig. 39E). More outer within the chamber 443 the lines corresponding to the rounded connection of the wall portion to the part containing the indentations 413 can be observed.

[0316] In the embodiments of Figs. 39A-39I and Figs. 42A-42G chambers 143 and 443 with the respective reinforcement elements 147, 415 and 447 are applied, the reinforcement elements 415 give stiffening for the snap elements 435.

[0317] The difference in size of the snap elements 435 and the snap elements 135 can be also observed with the comparison of Figs. 42D and 39D. Moreover, it is noted that the configuration of the base portion 432 is very similar to the base portion 132 shown in Fig. 39D, but the snap elements 435 extending out more vis-a-vis the base portion 432.

[0318] A top view of the shoulder element 410 is shown in Fig. 42E with the indentations 413 and the discharge element 18.

[0319] A further spatial view of the shoulder element 410 can be seen in Fig. 42F, on which the snap elements 435 as well as the air channels 444 can be observed well. In Fig. 42G a detailed view of a part of Fig. 42F is shown wherein a snap arrangement 435’ of the snap elements 435 of the shoulder element 410 is illustrated. It is also shown in Fig. 42G how the spiral form thread-projection 441 is formed in the lateral portion 433. Also, the collar portion 430 can be observed.

[0320] The configuration of the thread-projections 341 and 441 is similar, and in arrangement, these are similar to the thread-groove 141 (the thread-projection 441 is formed in a very similar way as the thread-groove 141 , but a groove has been replaced by a projection). The thread-groove 141 have a role of an airway. On the contrary, in the case of thread-projections 341 and 441 , these will border the airway, i.e. air can leave on the channels bordered by the spiral-formed thread-projections 341 and 441 . Thus, a wider airway is formed on the lateral portions 333 and 433 of the shoulder element 310 and 410, respectively, than in the lateral portion 133 of the shoulder element 110.

[0321] Herebelow, it is summarised for the various embodiments how the snap arrangement and the snap elements thereof if the illustrated cases (i.e. how the snap arrangement formed on (alternatively, at) the periphery of the base portion, as well as the air channels are formed. It is noted in this respect that sizes and configuration of the snap elements and the air channel(s) can be chosen in view of the aspects given in the description of the respective embodiments. It is also noted that the main features, i.e. snapping for the snap arrangement and allowing air through for the air channel is independent from the exact sizes and configuration thereof.

[0322] The snap elements 135 are formed similarly in the second embodiment of Figs. 39A- 39I as in the first embodiment of Figs. 3C-3E. The snap elements 135 (and the corresponding air channels 144) are slightly different at the two sides of the central base part of the base portion 132, but this is only because the central base part has different height (there is a material void of the base portion 132 behind the snap elements 135, which are otherwise configured similarly as the others) This modifies the snap elements 135 being at the inclination leading to the central base part, as well as the respective air channels 144. Since the inclination causes that a corner at the inclination of respective the snap elements 135 is cut, the corresponding air channels are larger than the others which are not affected by the inclination.

[0323] The fifth embodiment of Figs. 42A-42G can be compared to the second embodiment of Figs. 39A-39I, since it has also the chambers 443, different height central base part in the base portion 432 and thus somewhat different snap elements 435 and air channels 444 at the central base part (in both of these embodiments the snap arrangement is formed on - or alternatively, at - the periphery of the base portion, since the snap elements 135, 435 are everywhere on / at the periphery of the respective base portion 132, 432, also in case of the central base part). In the embodiment of Figs. 42A-42G the height of the snap elements 435 is increased compared to the height of the snap elements 135 of the embodiment of Figs. 39A- 39I, i.e. these have a larger height compared to the base portion 432 than those compared to the base portion 132. This larger height facilitates the introduction and positioning of the shoulder element 410 when it is inserted into the pre-assembled cartridge.

[0324] In the fourth embodiment of Figs. 41 A-411 the snap elements 335 are sized similarly as in the fifth embodiment of Figs. 42A-42G, but since the different height central base part is not included in this embodiment, all the snap elements 335 as well as the air channels 344 are of the same sizes.

[0325] In the third embodiment of Figs. 40A-40I the height of the snap elements 235 is further increased compared to snap elements 335 and 435. Also, the length (width) of the air channels 444 are increased on the periphery. In the other illustrated embodiments, the length of the air channels on the periphery (not the modified air channels at the central base part but the normal) is preferably below 20% of the length of the snap elements on the periphery, but in the embodiment of Figs. 40A- 401 the length of the air channel 244 is preferably larger than 50% and smaller than 150% of the length of the snap element 235 on the periphery.

[0326] It is noted for the embodiments of the shoulder element that it may be preferred to push the piston after the shoulder is connected by the help of the snap arrangement to the pre-assembled cartridge (i.e. when a cartridge according to the invention with any kind of foil tube and piston is assembled), with a predetermined pressure (for a predetermined time) in order to expel the remaining air (pushing can be applied onto the piston e.g. with the apparatus performing the filling of the pre-assembled cartridge). The insertion of the shoulder element itself will expel a volume of air according to its insertion volume. It is possible that there is more air in the preassembled cartridge before assembly than the insertion volume of the shoulder element (it is more preferred to underfill it a little that to overfill it).

[0327] The predetermined pressure can be determined by a corresponding experiment since it is needed for expelling the air (may depend e.g. on the filler material, as well as its viscosity). For the various embodiments this is preferred because - by pushing the filler material by means of the piston - remaining air can be expelled from the cartridge and the filler material can reach and enter the airways formed on the shoulder elements. Accordingly, a similar controlled hardening can be achieved just like in the case of the shoulder element 210 (see above; as e.g. Fig. 3A shows inner ribs can be formed on the end ring 34 which does not affect expelling of air but may help controlled hardening).

[0328] Figs. 43A-43B illustrate a fourth embodiment of the cartridge according to the invention. As shown by Figs. 43A-43B, in this embodiment, the cartridge comprises

[0329] - a foil tube 36 closed at one end with a closure clip 37,

[0330] - a piston 222 being similar to piston 122, but it has a central hole 229 inside in which the closed end with the closure clip 37 can be arranged (for detailed introduction of the piston 222, see Fig. 45A and related other figures),

[0331] - a shoulder element 210 illustrated in details in Figs. 40A-40I.

[0332] Fig. 43C shows the upper part of Fig. 43B, in which the inserted state of the shoulder element 210 can be observed in details. In accordance with the above, the shoulder element 210 is inserted into the pre-assembled cartridge as follows: the shoulder element 210 is snapped onto the end ring 34 (the snap elements 235 can be observed on both sides of the shoulder element 210 in a snapped state, see also the directing members 271 ), the end ring presses the foil tube 36 onto the cartridge cover tube which is the outermost layer from these. In connection with the insertion of the shoulder element 210 it can be observed also that the collar portion 230 lays on the collar portion of the end ring.

[0333] Furthermore, it can be also observed in Fig. 43C that the spacer member 267 constitutes a continuation of the other upper part of the lateral portion 233 (i.e. it can be considered a part that of), both are in line with the inner side of the tube-shaped portion of the end ring 34. In the view of Fig. 43C also the deepened zone 273 can be observed as locked into between the shoulder element 210 and the end ring 34.

[0334] The followings can be also understood based on Fig. 43C with reference to the description of Fig. 5B. When the shoulder element is pushed into the direction of its final place within the end ring 34, it can be understood that the end ring 34 will push the snap elements 235 inwards and these can only release from this state when reaching the inner edge (i.e. into which the snap elements 235 are snapped onto in Fig. 43C) and they can snap on it. This is emphasised here, since this snapping can be conceived based on Fig. 43C.

[0335] It is noted that the lateral portion of the shoulder element may be a slightly inclined, i.e. slightly tapering from the collar portion to the base portion. It may be also nontapering, in this case a base surface part - i.e. the surface without thread-groove, thread-projection, chambers (the lateral portion can have such interruptions also), deepened zone or other configuration, see also below - of the lateral portion is perpendicular at all points of the circumference.

[0336] The slightly inclined configuration can be observed in Fig. 43C which also illustrates how slight the inclination is. If the lateral portion is inclined than preferably, the tubeshaped portion of the end ring has a substantially matching inclination (this can also be observed in Fig. 43C; the base surface part fits to the surface of the end ring 34). These match to the extent (e.g. the tube-shaped portion of the end ring has a slightly lower inclination) that the snap arrangement of the shoulder element is able to snap onto the inner edge of the end ring, as well the configurations being on the base surface part of the lateral portion have enough space. Of course, these latter are sized or configured (i.e. e.g. these can deform; in Fig. 43C a flange can be observed in the end ring which „being in” illustration means that it is deformed, bended, the flange is, of course, does not penetrate into the end ring; the other flange of the shoulder element deforms also, but it cannot be seen, since the cross-section is in an air channel thereof) so that the snapping of the snap arrangement is not affected. It is noted that these does not affect also that the shoulder fits tightly into the load end of the pre-assembled cartridge, i.e. the shoulder element is able to withstand when the filler material is pushed out from the cartridge by means of the piston.

[0337] The lateral portion 233 has - between the collar portion 230 and the snap elements 235, from the collar portion 230 - a base surface part with the two flanges 277, 279 and the deepened zone 273 being deeper than the first part. To the base surface part - if the flanges 277, 279 are not considered - an imaginary surface can be fitted (conical, if there is an inclination, and cylindrical, if there is no inclination) and this imaginary surface determines how the spacer members 267 can be continuation of the lateral portion 233. The deepened zone 273 is deeper, i.e. formed under this imaginary surface.

[0338] The base surface part of the lateral portion can be defined for all embodiments (the above-mentioned imaginary surface can be fitted onto these), namely

[0339] - for the shoulder element 10 it is the same as the outer bare surface of the lateral portion 33,

[0340] - for the shoulder elements 110, 310 and 410 the base surface is the surface on which the thread-groove 141 or the thread-projection 341 , 441 is formed, i.e. where the lateral portion 133, 333, 433 is denoted on the side of the shoulder elements 110, 310 and 410, and

[0341] - for the shoulder element 210 the definition of the base surface part has been given above.

[0342] The imaginary surface, in view of the above, is defined such that if the base surface part would be extended to the whole lateral portion, i.e. if there would be nothing else in the outer surface thereof, only the base surface part extended to the whole outer surface. Since there can be other configuration on the lateral portion (flanges, deepened zone, thread-groove, thread-projection, chambers or other configurations as touched upon above), the imaginary surface fitted onto the base surface part of the lateral portion is to be considered for the definition according to which the snap arrangement extends outer than the lateral portion.

[0343] Extending outer can be understood that something is outer in the shoulder element, it is preferably meant that outer in the radial direction from the centre of the shoulder element, more preferably outer in respect of the discharge element, e.g. the longitudinal axis thereof when the discharge element is arranged in the centre of the shoulder element (as in the illustrated embodiments).

[0344] Furthermore, in Fig. 44 a nozzle 14’ is shown - being very similar to the nozzle 14 of Fig. 3B - but holders 29 are formed on the outside of the main body of the nozzle 14’. Thanks to the holders 29 the nozzle 14’ can be removed after use by grabbing it with two fingers.

[0345] In connection with the tolerances applied by the manufacturing, the followings are noted. In the pre-assembled cartridge, the foil tube is tightly pressed by the end ring into the cartridge cover tube. The outer diameter of the tube-shaped portion of the end ring is formed by a tolerance, namely it is larger than the inner diameter of the cartridge cover tube (e.g. approx. 0,1 -0,5 mm tolerance is applied). Also, the shoulder element is formed with tolerance to achieve a large enough tightening force: the outer diameter of the lateral portion of the shoulder element is larger than the inner diameter of the tube-shaped portion of the end ring (e.g. approx. 0,1 -0,5 mm tolerance is applied).

[0346] In Figs. 45A and 45B a sectional view and a spatial view of a fifth embodiment of the cartridge according to the invention are shown, which is preferably also a sustainable silicone cartridge.

[0347] The fifth embodiment of the cartridge comprises many similar / same components to the first embodiment of the cartridge. Accordingly, it comprises a cartridge cover tube 12 made of plastic or cardboard, a filled bag (i.e. a foil tube 36 closed on one of its ends), a shoulder element 10, an end ring 34 (by other name: a spout for foil).

[0348] Moreover, a nozzle 14 is connected to the cartridge.

[0349] Furthermore, the fifth embodiment of the cartridge comprises - in its construction - a piston 222, which is similar in many details to pistons described above, but it has a central hole 229 inside in which the closed end with the closure clip 37 can be arranged. The central hole ends in the bottom of the piston 222 in a projecting portion 223, which has a role in improving the angular deviation (i.e. to make an improvement on decreasing the angular deviation) during the movement of the piston 222. It is noted that this latter is an advantageous feature of the fifth embodiment of the cartridge, but it can be applied to the piston of other embodiments also (see the piston 122 in Figs. 30A-30B with the projecting portion 123).

[0350] The invention relates also to a set (or assembly) for a cartridge, i.e. set of components from which the cartridge can be manufactured (any of the illustrated embodiments of the shoulder element can be used for the cartridge, for manufacturing it and for the set).

[0351] The set for a cartridge according to the invention comprises

[0352] - a pre-assembled cartridge having a storage space portion for a filler material, and an end ring being in a load end of the storage space portion, and

[0353] - an embodiment of the shoulder element of the invention for closing the storage space portion of the pre-assembled cartridge by snapping the snap arrangement of the shoulder element on (onto) the end ring.

[0354] Figs. 2A-2E show a set for a cartridge with all of the components needed for assembling / manufacturing it. From Figs. 2A-2E, the nozzle 14 in Fig. 2D is considered to be an optional part of the set, since a nozzle for a cartridge can be obtained from the market, i.e. the set can be defined without it.

[0355] Figs. 23A-23C show a further set with also the optional nozzle 14, but not each component piece by piece, but the pre-assembled cartridge 115 separately (i.e. part set of “assembled” components as its name shows) and the further components in Figs. 23B and 23C (as given also in the above definition, the pre-assembled cartridge and the shoulder element are the separate parts of the set).

[0356] In the following the configuration and operation of the piston utilized in the fifth embodiment of the cartridge (of which the illustrated piston 222 is a realization, but it can be generalized in many details, for these, see Figs. 48A-48C illustrating the operation of a piston of the present approach) will be described in greater detail.

[0357] Fig. 46A shows the piston 222 builds up from two parts (i.e. having two component), a piston base 226 and a (top) sealing ring 225, which are shown separately in Fig. 46B. A top portion 221 (with the central hole) and the base portion 227 having cylindrical shape to be guided in the cartridge are also shown in Figs. 46A and 46B.

[0358] In Fig. 46B the arrangement and configuration of snap tabs 201 (snap members) can be observed. The sealing ring 225 can be pushed onto the top portion 221 , until it snaps through the snap tabs 201 (having a slightly wedge-like shape in the direction of the base portion 227) reaching its final place. In its final place the sealing ring 225 lies on top of the base portion 227 encompassing the top portion 221 (see below for more details, e.g. Fig. 46G). Furthermore, as illustrated on the piston base 226 in Fig. 46B, between the snap tabs 201 and the base portion 227, the sealing ring 225 has space to be arranged.

[0359] Fig. 46C shows a cross-section of the sealing ring 225 (for the sealing ring 225 see the top part of Fig. 46B to compare). Fig. 46C thus illustrates that an (outer) side wall 207 of the sealing ring 225 is angled (it may be also flat). Fig. 46C also shows that an inner wall 209 of the sealing ring 225 arranged around the top portion 221 is straight and that an indentation 237 is formed in the sealing ring 225 facing forward (i.e. in the direction in which the piston 222 is moved in the cartridge during its operation), which indentation separates a lip 239 of the sealing ring 225 from the inner part that of.

[0360] The angled characteristics of side wall 207 of the sealing ring 225 means according to Fig. 46C that it is angled and not “straight”, i.e. not parallel to the inner wall 209 of the sealing ring 225 but the base (bottom) part of the side wall 207 (to be arranged at to the base portion 227) is closer to the inner wall 209 than the top part of the side wall 207. The side wall 207 thus will be pressed onto the inner wall of the cartridge when the piston 222 is inserted into a cartridge.

[0361] The piston base 226 depicted separately in Fig. 46B can be seen in a bottom-spatial view and in a bottom view in Fig. 46D and Fig. 46E, respectively (in Figs. 46D and 46E it cannot be observed whether the sealing ring 225 is arranged or not in these figures, but the sealing ring 225 is considered to be arranged and these are denoted as the piston 222).

[0362] In Figs. 46D and 46E, the inner space of the piston 222 can be observed. From this inner space, the inner space portion of the top portion 221 is divided into chambers - in the illustrated exemplary case, into six chambers - with separating elements 203 and in the central part of this inner space portion the projecting portion 223 is formed on a cylindrical element - encompassing the central hole 229 - into which the separating elements 203 connect. The inner space portion of the base portion 227 can also be observed (there are cutouts 231 formed on an inside of the widened shoulder rim 205 corresponding to the wider base portion, see the bottom part of Fig. 46B for the widened shoulder rim 205). The projecting portion 223 projects also into the inner space portion of the base portion, this gives the projecting characteristic thereof.

[0363] In Fig. 46E with the bottom view of the piston 222, the above introduced details can be observed, i.e. the inside of the widened shoulder rim with the cutouts 231 (in other name, hole area, through which the sealing ring 225 can be observed if this is arranged), the separating elements 203 between the chambers.

[0364] Figs. 46F, 46G and 46H show a side view of the piston 222, a detail of a crosssection A-A (see Fig. 46H) thereof, and a top view, respectively. In the side view of Fig. 46F, the top portion 221 with the snap tabs 201 , the sealing ring 225 and the base portion 227 can be observed. Also, longitudinal deepened grooves can be observed on the base portion 227 (these are formed on the whole length of the base portion 227, see also Fig. 46B), between these a slight configuration is given to the side of the base portion, starting from the sealing ring 225, there is the outermost extending part thereof, after that a slight tapering and a cutoff at the bottom of the base portion 227. The detail shown in Fig. 46G can be compared to Fig. 46C, since both figures show the sealing ring 225, but in Fig. 46G also the arrangement of the sealing ring 225 can be observed.

[0365] Furthermore, it can be observed in Fig. 46G how the sealing ring 225 is arranged when snapped through the snap tab 201 shown in Fig. 46G (the cross-section A-A goes through a snap tab 201 , as well as through a cutout 231 the places of which cutouts 231 correspond to the respective snap tabs 201 , cf. the bottom part of Fig, 46B).

[0366] It can be also observed in Fig. 46G that in the piston 222 configured as shown in the figures, the widened shoulder rim 205 is formed with an inclined surface lowering outwards in the radial direction (see also related aspects in connection with Fig. 46 J).

[0367] In Fig. 46H the top view of the piston 222 can be observed (see also the notations for the cross-sections A-A and B-B), i.e. the top portion 221 with the central hole 229 and the sealing ring 225 arranged around the top portion 221 (also the snap tabs 201 can be observed slightly).

[0368] Some aspects of the operation (the aspects of how does it work) of the piston 222 are included below in connection with Figs. 46I and 46J, showing a cross-section B- B and a detail thereof (for cross-section B-B see Fig. 46H which illustrate the it does not go through snap tabs 201 , but cuts the top portion 221 of the piston between neighbouring snap tabs 201 ). It is noted that the projecting portion 223 can be clearly observed in Fig. 46I (cf. with 48A and 48B also).

[0369] An important characteristic of the (top) sealing ring 225 is interpreted by the help of Fig. 46J, namely that the sealing ring 225 may deform and bend during use (i.e. during the so-called system usage of the cartridge, which latter also may be called cartridge system). During system usage the awakening force during use - i.e. the force arising during use - push the lip 239 of the sealing ring 225 down (down, considering the figure, which is the opposite direction to the movement of the piston in use). Furthermore, Fig. 46J illustrates how the sealing ring 225 is arranged where it runs between snap tabs 201 -cutouts 231 , i.e. that it fits against the neighbouring configuration.

[0370] It can be also observed in Fig. 46J that the widened shoulder rim 205 of the base portion 227 of the piston 222 has an inclined surface under the sealing ring 225 so that the sealing ring 225 has space portion 293 being free for allowing deform ing / bending. During this deformation, the outer diameter of the sealing ring 225 increases enhancing the sealing effect.

[0371] As it has been touched upon above, it is an object of the piston 222 to make an improvement on the angular deviation of the piston during its use, i.e. to reduce piston misalignment during use.

[0372] Figs. 47A-47B show the construction of a piston 222’ (being different from the piston 222 in that it has no projecting portion, but it has a flat connection surface 295 (connection area), see below for more details) in an ideal, centred position, and a non-centred position (arranged for the foil tube 36 with the closure clip 37 in the cartridge cover tube 12 for illustration), respectively. The flat connection surface 295 of the piston 222’ that contacts the piston pushing plate 240 (by other name pistonpushing) plate or piston-pushing teller - as it is called on the relevant technical field it has a plate-like shape with a deepened area at the centre, namely the inclined surface portion 245 is formed at the deepening of the plate) of the gun applied for using the cartridge.

[0373] The piston pushing plate 240 has a weak guiding in the cartridge (i.e. the piston pushing plate can be tilted - vis-a-vis its ideal axial direction arrangement, the axial direction corresponding to the longitudinal axis of the cartridge -, which causes that it will proceed tilted as pushed forward, the problem related to it is thus increases with further and further pushing of the piston). Due to this fact, if the piston pushing plate 240 connect / touch the piston 222’ via a flat surface (i.e. as illustrated in Fig. 47A, see also the ideal common moving and force direction 297), the awakening force (the force applied to the piston pushing plate 240 during the usage) can turn / move / roll the piston 222’ into a non-centered / non-centred, angled position in the cartridge (i.e. as illustrated in Fig. 47B, see also inclined force direction 299a and moving direction 299b also coincide). Disadvantageously, if the piston 222’ is in a non-centred position in the cartridge during the usage, then it can be stuck / blocked.

[0374] The configuration of the piston 222 provides a solution to this problem by improving the angular deviation during the movement.

[0375] As it was shown above for the piston 222 and as it can be observed in Figs. 48A- 48C the piston 222 (i.e. the base portion 227 thereof) has a projecting portion 223 (inner sleeve / extension) at the bottom area which touches an inclined surface portion 245 of the piston pushing plate 240 of the gun applied for the cartridge. The projecting portion 223 projects from the top portion 221 of the piston 222 and encompassed by the mantle of the base portion 227, but the piston pushing plate 240 can reach the projecting portion 223.

[0376] In Figs. 48A-48C, the piston is shown also for the foil tube 36 with the closed end with the closure clip 37 in the cartridge cover tube 12. It is noted furthermore, that Fig. 48A shows an ideal, centred position for the arrangement.

[0377] In Fig. 48B as well as in Fig. 48C which is a detailed view of Fig. 48B, the piston pushing plate 240 is in a non-centred position. However, it is illustrated in Figs. 48B and 48C that the projecting portion can sit onto the inclined surface portion 245 of the piston pushing plate 240, according to which arrangement, although an inclined force direction 289a is applied by the non-centred piston pushing plate 240, a centred moving direction 289b can be achieved. Fig. 48B illustrates that the piston 222 does not turn in the cartridge.

[0378] It is hereby noted that the piston pushing plate 240 is typically not a part of the cartridge, but it usually corresponds to the gun which is applied for the cartridge (for discharging the filler material from the cartridge). However, as illustrated in the figures such a projecting portion 223 is to be formed on the piston 222 which can sit onto the inclined surface portion 245 of an (ordinary) piston pushing plate 240 (i.e. the projecting portion 223 is formed to be sized / scaled to this).

[0379] In other words, the projecting portion 223 can turn / move / roll in the piston pushing plate 240 (i.e. in the inclined surface portion 245 thereof), which ensures the centred movement of piston in the cartridge even with a non-centred movement of the piston pushing plate 240 (i.e. non-centred force direction).

[0380] It is also noted that the projecting portion 223 touches the inclined surface portion 245 of the piston pushing plate 240 in a “point-like” manner, not as a flat surface (see Fig. 48C which illustrates that the outer - rounded - edge of the projecting portion 223 is in contact with the inclined surface portion 245 of the piston pushing plate 240; i.e. the “point-like” contact means contact along a line - namely on a circle-like shape - on the inclined surface portion 245). Thus, in the illustrated case the preferable cylindrical projecting portion 223 (namely it is a shape of a cylinder mantle) contacts the preferably circumferential inclined surface portion 245 of the piston pushing plate 240 along a closed line, i.e. along a circle with a good approximation.

[0381] Also, a flat surface portion 243 of the piston pushing plate 240 is shown in Fig. 48C. Furthermore, a block member 247 thereof is shown formed in the deepened portion encompassed by the inclined space portion 245, the block member may be introduced somehow to the inner space encompassed by the projecting portion 223.

[0382] It can be understood that the closed piston 122 with the projecting portion 123 and the opened piston 222 with the projecting portion 223 - i.e. a piston with projecting portion - can be utilized in the respective embodiments of the cartridge according to the needed type of piston (e.g. the opened piston 222 for the first embodiment with the foil tube 36 having a closed end, where the piston may be opened and the closed piston 122 is needed in the so-called open sleeve embodiments, the only such illustrated embodiment is the one illustrated in Figs. 22A-38, already using the piston 122 with the projecting portion 123).

[0383] The invention is of course not limited to the preferred embodiments described in detail, but further variants, modifications and improvements are possible within the scope of protection defined by the claims.

Claims

CLAIMS1 . A shoulder element for a cartridge, the shoulder element (10, 50, 110, 210, 310, 410) comprising- a base portion (32, 132, 232, 332, 432) having a discharge hole (31 ),- a discharge element (18) formed on the discharge hole (31 ),- a lateral portion (33, 133, 233, 333, 433) being formed on a periphery of the base portion (32, 132, 232, 332, 432) around the discharge element (18), and- a collar portion (30, 130, 230, 330, 430) extending outwards from the lateral portion (33, 133, 233, 333, 433), c h a r a c t e r i s e d in that- the shoulder element (10, 50, 110, 210, 310, 410) being adapted for closing a pre-assembled cartridge (15, 115) corresponding to the cartridge, wherein the pre-assembled cartridge (15, 115) having a storage space portion (51 , 151 ) for a filler material (20) and an end ring (34, 134) being in a load end (17, 117) of the storage space portion (51 , 151 ), and wherein the lateral portion (33, 133, 233, 333, 433) and the collar portion (30, 130, 230, 330, 430) are adapted for being fitted into the end ring (34, 134) of the load end (17, 117) and onto a load end edge (19, 119) of the load end (17, 117), respectively,- the shoulder element (10, 50, 110, 210, 310, 410) further comprising a snap arrangement (35’, 135’, 235’, 335’, 435’) for snapping on the end ring (34, 134) of the pre-assembled cartridge (15, 115), the snap arrangement (35’, 135’, 235’, 335’, 435’) being formed on the periphery of the base portion (32, 132, 232, 332, 432), extending outer than the lateral portion (33, 133, 233, 333, 433), wherein at least one air channel (44, 144, 244, 344, 444) is formed for allowing air through the snap arrangement (35’, 135’, 235’, 335’, 435’).

2. The shoulder element according to claim 1 , characterised in that the snap arrangement (35’, 135’, 235’, 335’, 435’) is constituted by a plurality of snap elements (35, 135, 235, 335, 435), wherein neighbouring snap elements are separated by a respective air channel (44, 144, 244, 344, 444).

3. The shoulder element according to claim 1 or claim 2, characterised in that the snap arrangement (35’, 135’, 235’, 335’, 435’) has a wedge-like configuration on the periphery of the base portion (32, 132, 232, 332, 432), wherein the wedge-like configuration- having an end portion with an end surface facing the collar portion (30, 130, 230, 330, 430), extending farthest outer than the lateral portion (33, 133, 233, 333, 433) and- having a side portion tapering from the end portion.

4. A method for manufacturing a cartridge, comprising the steps of- filling (S5), with a filler material (20), a pre-assembled cartridge (15, 115) having a storage space portion (51 , 151 ) for the filler material (20) and an end ring (34, 134) being in a load end (17, 117) of the storage space portion (51 , 151 ), and- closing (S7a, S7b, S7c) the storage space portion (51 , 151 ) of the preassembled cartridge (15, 115) with the shoulder element (10, 50, 110, 210, 310, 410) according to any of claims 1 -3 by snapping the snap arrangement (35’, 135’, 235’, 335’, 435’) of the shoulder element (10, 50, 110, 210, 310, 410) on the end ring (34, 134).

5. The method according to claim 4, characterised in that in the course of manufacturing the pre-assembled cartridge (15, 115)- inserting (S92, S192) the end ring (34, 134) into a first foil end (81 , 181 ) of a foil tube (36, 136), and- arranging (S98, S194) the foil tube (36, 136) into a cartridge cover tube (12, 112), wherein the end ring (34, 134) is arranged onto a first cover end (91 , 191 ) of the cartridge cover tube (12, 112), wherein the storage space portion (51 , 151 ) is established in the foil tube (36, 136).

6. The method according to claim 5, characterised by welding, after inserting (S92, S192) the end ring (34, 134) into a first foil end (81 , 181 ) of a foil tube (36, 136), the end ring (34, 134) to the foil tube (36, 136).

7. The method according to claim 5 or claim 6, characterised in that the storage space portion (51 ) is established by closing (S94) a second foil end (83) of the foil tube (36) before inserting (S98) the foil tube (36) into a cartridge cover tube (12).

8. The method according to claim 7, characterised by inserting (S96) a piston (22, 62, 222) into a second cover end (93) of the cartridge cover tube (12), before inserting the foil tube (36) into a cartridge cover tube (12).

9. The method according to claim 5 or claim 6, characterised by inserting (S198), after the foil tube (136) is inserted (S194) into the cartridge cover tube (112), an auxiliary end ring (165) into a second foil end (183) of the foil tube (136), wherein the auxiliary end ring (165) is arranged onto a second cover end (193) of the cartridge cover tube (112), and the storage space portion (151 ) is established by inserting a closed piston (122) into the foil tube (136) being inserted into the cartridge cover tube (112).

10. A set for a cartridge, comprising- a pre-assembled cartridge (15, 115) having a storage space portion (51 , 151 ) for a filler material (20), and an end ring (34, 134) being in a load end (17, 117) of the storage space portion (51 , 151 ), and- the shoulder element (10, 50, 110, 210, 310, 410) according to any of claims 1 -3 for closing the storage space portion (51 , 151 ) of the preassembled cartridge (15, 115) by snapping the snap arrangement (35’, 135’, 235’, 335’, 435’) of the shoulder element (10, 50, 110, 210, 310, 410) on the end ring (34, 134).11 . A cartridge comprising- a pre-assembled cartridge (15, 115) having a storage space portion (51 , 151 ) filled with a filler material (20), and an end ring (34, 134) being in a load end (17, 117) of the storage space portion (51 , 151 ), and- the shoulder element (10, 50, 110, 210, 310, 410) according to any of claims 1 -3, wherein the storage space portion (51 , 151 ) of the preassembled cartridge (15, 115) is closed with the shoulder element (10, 50, 110, 210, 310, 410) by snapping the snap arrangement (35’, 135’,235’, 335’, 435’) of the shoulder element (10, 50, 110, 210, 310, 410) on the end ring (34, 134).

12. The cartridge according to claim 11 , characterised in that in the preassembled cartridge (15, 115) - the end ring (34, 134) is inserted into a first foil end (81 , 181 ) of a foil tube(36, 136), and- the foil tube (36, 136) is arranged into a cartridge cover tube (12, 112), wherein the end ring (34, 134) is arranged in a first cover end (91 , 191 ) of the cartridge cover tube (112), wherein the storage space portion (51 , 151 ) is established in the foil tube (36,136).

13. The cartridge according to claim 12, characterised in that the cartridge cover tube (12, 112) is made of cardboard.

Images