US20030057210A1 - Cartridge with piston restraint - Google Patents
Cartridge with piston restraint Download PDFInfo
- Publication number
- US20030057210A1 US20030057210A1 US10/233,316 US23331602A US2003057210A1 US 20030057210 A1 US20030057210 A1 US 20030057210A1 US 23331602 A US23331602 A US 23331602A US 2003057210 A1 US2003057210 A1 US 2003057210A1
- Authority
- US
- United States
- Prior art keywords
- piston
- material receptacle
- receptacle chamber
- disk
- cartridge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D83/00—Containers or packages with special means for dispensing contents
- B65D83/0005—Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the container
Definitions
- the invention pertains to a cartridge with a piston restraint.
- coaxial cartridges that are manufactured in the form of an integral injection molding part and in which, for example, a first component that tends to gasify is accommodated in an inner tube arranged within an outer tube that accommodates the second component, the manufacturing technology does not make it possible to produce the required hook-shaped undercut on the inner tube for snapping on a plastic ring.
- the invention is based on the objective of developing a cartridge of the initially described type which contains an inexpensive piston restraint that can be rapidly installed and prevents the piston from being pressed out of the cartridge.
- a cartridge that is realized in accordance with the provision of a cartridge with at least one material receptacle chamber, an axially displaceable piston arranged in the material receptacle chamber and a piston restraint for preventing the at least one piston from being pressed out of the pertinent material receptacle chamber, characterized by the fact that the piston restraint consists of a springable restraining disk that is realized similar to a disk spring and positively and/or non-positively held on the inner wall of the at least one material receptacle chamber.
- the cartridge can be characterized by the fact that the restraining disk has an annular shape, that the restraining disk consists of metal, that the restraining disk consists of spring steel, that the restraining disk has a thickness of a few tenths of a millimeter, and/or that the restraining disk is curved or inclined in the direction of the piston.
- the restraining disk can be inserted into the material receptacle chamber by the means of a ram.
- the invention concerns a cartridge with at least one material receptacle chamber, an axially displaceable piston arranged in the material receptacle chamber and a piston restraint for preventing the at least one piston from being pressed out of the pertinent material receptacle chamber.
- the piston restraint consists of an elastic restraining disk that is realized in the form of a disk spring and positively and/or non-positively held on the inner wall of the at least one material receptacle chamber.
- the cartridge according to the invention can be seen in the fact that the piston is secured by the clamping or wedging effect of a restraining element such that no additional welding, bonding or snap-on mechanisms are required. This significantly simplifies the manufacture of cartridges provided with restraining devices of this type. The time and the costs for manufacturing the restraining element can also be reduced. Instead of utilizing a costly injection molding tool for manufacturing a plastic ring, the restraining element of the restraint according to the invention can be manufactured in a comparatively inexpensive fashion with a cutting tool.
- Another advantage of the invention is the simplified installation.
- the restraining element can be inserted into the cartridge in a relatively simple and rapid fashion, namely because no complicated connecting processes are required.
- the restraining element consists of a ring disk of spring steel which adjoins the inner wall of a corresponding receptacle chamber with a certain prestress similar to a disk spring.
- the ring disk may, for example, be inserted into the rear end of the central receptacle tube of a coaxial cartridge. If so required, such a restraining disk could also be used for correspondingly securing the annular piston arranged around a central receptacle tube. The piston can also be secured in this fashion in other single-component or multi-component cartridges.
- the ring disk is preferably installed in such a way that it is curved or angled in the direction of the piston. If the piston presses against the ring disk in this case, the radial force on the outer side of the ring disk increases such that the ring disk is additionally wedged on the inner wall of the material receptacle chamber.
- FIG. 1 the rear end of a cartridge with a piston and a restraining ring in the storage state
- FIG. 2 the rear end of a cartridge with a piston and a restraining ring in the functional state
- FIG. 3 a partially illustrated ram for installing the restraining ring shown in FIGS. 1 and 2.
- FIGS. 1 and 2 show the rear end of a cartridge 1 that usually contains a not-shown outlet opening on the upper end.
- the plastic cartridge 1 contains a cylindrical material receptacle chamber 2 , in which a piston 3 in the form of a delivery piston is arranged such that it can be axially displaced.
- An elastic restraining ring 5 of metal that adjoins the inner wall 6 of the material receptacle chamber 2 with a prestress is inserted into the rear cartridge end 4 .
- the restraining ring 5 consists of a ring that is manufactured from spring steel and has a thickness of a few tenths of a millimeter. This ring can be inserted into the material receptacle chamber 2 in a particularly simple fashion and with a low expenditure of force by means of the ram 7 that is schematically illustrated in FIG. 3.
- the ram 7 contains a front receptacle pin 8 and a conical contact surface 9 for inserting the restraining ring 5 similar to an inwardly curved disk spring into the material receptacle chamber 2 .
- the restraining ring 5 Due to the prestress of the restraining ring 5 generated during the insertion, as well as its comparatively thin material, the restraining ring 5 is able to press into the inner wall 6 of the material receptacle chamber 2 with its radially outer side while the cartridge is stored. This means that the restraining ring 5 is not only frictionally retained on the inner wall of the material receptacle chamber 2 , but also positively fixed thereon. If excess pressure builds up in the material receptacle chamber, the piston 3 is pressed against the inwardly inclined restraining ring 5 as schematically illustrated in FIG. 2. This causes the restraining ring 5 to be additionally pressed radially outward such that it is even more rigidly wedged on the inner wall 6 of the material receptacle chamber 2 .
- the invention was described with reference to a standard cartridge with only one cylindrical material receptacle chamber. Naturally, the invention may also be used in two-component or multi-component cartridges that contain several material receptacle chambers and several pistons.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
Abstract
A cartridge with at least one material receptacle chamber, an axially displaceable piston arranged in the material receptacle chamber and a piston restraint for preventing the at least one piston from being pressed out of the pertinent material receptacle chamber. The piston restraint consists of an elastic restraining disk that is realized in the form of a disk spring and positively and/or non-positively held on the inner wall of the at least one material receptacle chamber.
Description
- 1. Field of the Invention
- The invention pertains to a cartridge with a piston restraint.
- 2. Prior Art
- Joint sealing compounds, adhesives, pastes and the like are frequently stored in cartridges with one or more material receptacle chamber(s) that is/are provided with an outlet opening and a corresponding delivery piston for dispensing the cartridge contents. Cartridges of this type are usually sealed in an airtight fashion on both sides before they are used. On the lower end, the cartridges are sealed by the axially displaceable delivery piston, with the upper end being sealed by a removable plug or a screw cap. Many cartridges contain materials that tend to gasify at elevated temperatures. This causes an internal pressure to be built up in the material receptacle chambers, with this internal pressure possibly causing the delivery piston to be pressed out of the material receptacle chamber during the storage or the transport of the cartridges.
- In order to prevent an undesired pressing out of the delivery piston, it is common practice to utilize plastic rings that are either attached onto the end of the cartridges by means of a snap-on mechanism or fixed on the cartridges by means of friction welding. However, these solutions are complicated and expensive with respect to the manufacturing technology. The friction welding method, in particular, is time-consuming and associated with relatively high costs. In addition, known snap-on mechanisms cannot be used on all cartridges. Especially with coaxial cartridges that are manufactured in the form of an integral injection molding part and in which, for example, a first component that tends to gasify is accommodated in an inner tube arranged within an outer tube that accommodates the second component, the manufacturing technology does not make it possible to produce the required hook-shaped undercut on the inner tube for snapping on a plastic ring.
- The invention is based on the objective of developing a cartridge of the initially described type which contains an inexpensive piston restraint that can be rapidly installed and prevents the piston from being pressed out of the cartridge.
- This objective is attained with a cartridge that is realized in accordance with the provision of a cartridge with at least one material receptacle chamber, an axially displaceable piston arranged in the material receptacle chamber and a piston restraint for preventing the at least one piston from being pressed out of the pertinent material receptacle chamber, characterized by the fact that the piston restraint consists of a springable restraining disk that is realized similar to a disk spring and positively and/or non-positively held on the inner wall of the at least one material receptacle chamber. The cartridge can be characterized by the fact that the restraining disk has an annular shape, that the restraining disk consists of metal, that the restraining disk consists of spring steel, that the restraining disk has a thickness of a few tenths of a millimeter, and/or that the restraining disk is curved or inclined in the direction of the piston. The restraining disk can be inserted into the material receptacle chamber by the means of a ram.
- As noted above, the invention concerns a cartridge with at least one material receptacle chamber, an axially displaceable piston arranged in the material receptacle chamber and a piston restraint for preventing the at least one piston from being pressed out of the pertinent material receptacle chamber. The piston restraint consists of an elastic restraining disk that is realized in the form of a disk spring and positively and/or non-positively held on the inner wall of the at least one material receptacle chamber.
- One significant advantage of the cartridge according to the invention can be seen in the fact that the piston is secured by the clamping or wedging effect of a restraining element such that no additional welding, bonding or snap-on mechanisms are required. This significantly simplifies the manufacture of cartridges provided with restraining devices of this type. The time and the costs for manufacturing the restraining element can also be reduced. Instead of utilizing a costly injection molding tool for manufacturing a plastic ring, the restraining element of the restraint according to the invention can be manufactured in a comparatively inexpensive fashion with a cutting tool.
- Another advantage of the invention is the simplified installation. The restraining element can be inserted into the cartridge in a relatively simple and rapid fashion, namely because no complicated connecting processes are required.
- In one particularly practical embodiment of the invention, the restraining element consists of a ring disk of spring steel which adjoins the inner wall of a corresponding receptacle chamber with a certain prestress similar to a disk spring. The ring disk may, for example, be inserted into the rear end of the central receptacle tube of a coaxial cartridge. If so required, such a restraining disk could also be used for correspondingly securing the annular piston arranged around a central receptacle tube. The piston can also be secured in this fashion in other single-component or multi-component cartridges.
- The ring disk is preferably installed in such a way that it is curved or angled in the direction of the piston. If the piston presses against the ring disk in this case, the radial force on the outer side of the ring disk increases such that the ring disk is additionally wedged on the inner wall of the material receptacle chamber.
- Other details and advantages of the invention are discussed below in the description of one preferred embodiment with reference to the figures. Shown are:
- FIG. 1, the rear end of a cartridge with a piston and a restraining ring in the storage state;
- FIG. 2, the rear end of a cartridge with a piston and a restraining ring in the functional state, and
- FIG. 3, a partially illustrated ram for installing the restraining ring shown in FIGS. 1 and 2.
- FIGS. 1 and 2 show the rear end of a
cartridge 1 that usually contains a not-shown outlet opening on the upper end. Theplastic cartridge 1 contains a cylindricalmaterial receptacle chamber 2, in which apiston 3 in the form of a delivery piston is arranged such that it can be axially displaced. Anelastic restraining ring 5 of metal that adjoins theinner wall 6 of thematerial receptacle chamber 2 with a prestress is inserted into therear cartridge end 4. - In one practical embodiment, the
restraining ring 5 consists of a ring that is manufactured from spring steel and has a thickness of a few tenths of a millimeter. This ring can be inserted into thematerial receptacle chamber 2 in a particularly simple fashion and with a low expenditure of force by means of theram 7 that is schematically illustrated in FIG. 3. Theram 7 contains afront receptacle pin 8 and a conical contact surface 9 for inserting therestraining ring 5 similar to an inwardly curved disk spring into thematerial receptacle chamber 2. Due to the prestress of therestraining ring 5 generated during the insertion, as well as its comparatively thin material, therestraining ring 5 is able to press into theinner wall 6 of thematerial receptacle chamber 2 with its radially outer side while the cartridge is stored. This means that therestraining ring 5 is not only frictionally retained on the inner wall of thematerial receptacle chamber 2, but also positively fixed thereon. If excess pressure builds up in the material receptacle chamber, thepiston 3 is pressed against the inwardlyinclined restraining ring 5 as schematically illustrated in FIG. 2. This causes therestraining ring 5 to be additionally pressed radially outward such that it is even more rigidly wedged on theinner wall 6 of thematerial receptacle chamber 2. - The invention was described with reference to a standard cartridge with only one cylindrical material receptacle chamber. Naturally, the invention may also be used in two-component or multi-component cartridges that contain several material receptacle chambers and several pistons.
- Although the invention has been shown and described with reference to a preferred embodiment, changes are possible and will be apparent to those skilled in the art from the teachings herein. Such changes are deemed to fall within the purview of the invention as claimed.
Claims (7)
1. Cartridge with at least one material receptacle chamber, an axially displaceable piston arranged in the material receptacle chamber and a piston restraint for preventing the at least one piston from being pressed out of the pertinent material receptacle chamber, characterized by the fact that the piston restraint consists of a springable restraining disk that is realized similar to a disk spring and positively and/or non-positively held on the inner wall of the at least one material receptacle chamber.
2. Cartridge according to claim 1 , characterized by the fact that the restraining disk has an annular shape.
3. Cartridge according to claim 1 , characterized by the fact that the restraining disk consists of metal.
4. Cartridge according to claim 1 , characterized by the fact that the restraining disk consists of spring steel.
5. Cartridge according to claim 1 , characterized by the fact that the restraining disk has a thickness of a few tenths of a millimeter.
6. Cartridge according to claim 1 , characterized by the fact that the restraining disk is curved or inclined in the direction of the piston.
7. Cartridge according to claim 1 , characterized by the fact that the restraining disk can be inserted into the material receptacle chamber by the means of a ram.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20115432.3 | 2001-09-19 | ||
DE20115432U DE20115432U1 (en) | 2001-09-19 | 2001-09-19 | Cartridge with piston lock |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030057210A1 true US20030057210A1 (en) | 2003-03-27 |
Family
ID=7961877
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/233,316 Abandoned US20030057210A1 (en) | 2001-09-19 | 2002-08-29 | Cartridge with piston restraint |
Country Status (2)
Country | Link |
---|---|
US (1) | US20030057210A1 (en) |
DE (2) | DE20115432U1 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3268123A (en) * | 1964-04-21 | 1966-08-23 | Walter B Spatz | Dispensers for fluent masses |
US3870200A (en) * | 1973-05-14 | 1975-03-11 | Spatz Corp | Valveless dispenser for fluent masses |
US4474313A (en) * | 1980-11-08 | 1984-10-02 | Bramlage Gmbh | Dispenser for pasty substances |
US4629097A (en) * | 1985-02-22 | 1986-12-16 | Realex Corporation | Snap-action orifice sealing plug for viscous product dispenser |
US4684043A (en) * | 1984-09-24 | 1987-08-04 | Realex Corporation | Shipping seal for viscous product dispenser |
US4691847A (en) * | 1983-12-27 | 1987-09-08 | Realex Corporation | Pasty product dispenser having combination actuator and outlet valve |
US5052592A (en) * | 1989-08-14 | 1991-10-01 | Bramlage Gesellschaft Mit Beschrankter Haftung | Dispenser for paste compositions |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8135544U1 (en) * | 1981-12-05 | 1983-07-28 | Fa. Emil Rüsing, 5608 Radevormwald | Donor for pasty masses in particular |
GB8729810D0 (en) * | 1987-12-22 | 1988-02-03 | Monteil | Cosmetic dispenser |
DE19810950C1 (en) * | 1998-03-13 | 1999-06-17 | Heraeus Kulzer Gmbh | Manual ejector gun for paste from cartridge |
AUPQ212799A0 (en) * | 1999-08-10 | 1999-09-02 | Hanly, Robert John | Decompressing system for a masticating gun |
DE29915061U1 (en) * | 1999-08-27 | 2000-01-05 | Glau Katrin | Device for discharging media |
-
2001
- 2001-09-19 DE DE20115432U patent/DE20115432U1/en not_active Expired - Lifetime
-
2002
- 2002-08-08 DE DE10236285.8A patent/DE10236285B4/en not_active Expired - Fee Related
- 2002-08-29 US US10/233,316 patent/US20030057210A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3268123A (en) * | 1964-04-21 | 1966-08-23 | Walter B Spatz | Dispensers for fluent masses |
US3870200A (en) * | 1973-05-14 | 1975-03-11 | Spatz Corp | Valveless dispenser for fluent masses |
US4474313A (en) * | 1980-11-08 | 1984-10-02 | Bramlage Gmbh | Dispenser for pasty substances |
US4691847A (en) * | 1983-12-27 | 1987-09-08 | Realex Corporation | Pasty product dispenser having combination actuator and outlet valve |
US4684043A (en) * | 1984-09-24 | 1987-08-04 | Realex Corporation | Shipping seal for viscous product dispenser |
US4629097A (en) * | 1985-02-22 | 1986-12-16 | Realex Corporation | Snap-action orifice sealing plug for viscous product dispenser |
US5052592A (en) * | 1989-08-14 | 1991-10-01 | Bramlage Gesellschaft Mit Beschrankter Haftung | Dispenser for paste compositions |
Also Published As
Publication number | Publication date |
---|---|
DE20115432U1 (en) | 2003-02-27 |
DE10236285A1 (en) | 2003-04-03 |
DE10236285B4 (en) | 2015-02-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SULZER CHEMTECH AG, SWITZERLAND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PRESTELE, EUGEN;REEL/FRAME:013549/0575 Effective date: 20021120 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |