GB1436217A - Pliable tubular con-ainers - Google Patents
Pliable tubular con-ainersInfo
- Publication number
- GB1436217A GB1436217A GB3699373A GB3699373A GB1436217A GB 1436217 A GB1436217 A GB 1436217A GB 3699373 A GB3699373 A GB 3699373A GB 3699373 A GB3699373 A GB 3699373A GB 1436217 A GB1436217 A GB 1436217A
- Authority
- GB
- United Kingdom
- Prior art keywords
- endpiece
- tool
- aug
- rotatable
- edge portion
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/06—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using friction, e.g. spin welding
- B29C65/0672—Spin welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/118—Single monotone curved joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/124—Tongue and groove joints
- B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
- B29C66/12441—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue being a single wall
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/124—Tongue and groove joints
- B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
- B29C66/12469—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being asymmetric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
- B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/61—Joining from or joining on the inside
- B29C66/612—Making circumferential joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/63—Internally supporting the article during joining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
-
- 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
- B65D35/00—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
- B65D35/02—Body construction
- B65D35/12—Connections between body and closure-receiving bush
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/20—Flexible squeeze tubes, e.g. for cosmetics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Tubes (AREA)
Abstract
1436217 Seaming non-metallic sheet material V FLAX 3 Aug 1973 [3 Aug 1972] 36993/73 Heading B5K [Also in Division B8] In the manufacture of a flexible tubular container, an end piece 2 is friction welded to a flexible tubular body 1 by disposing the endpiece 2 with a peripheral region thereof within a marginal edge portion 20 of the body 1 and rotating the body 1 and the endpiece 2 relative to one another while the endpiece peripheral region is radially outwardly deformed into frictional engagement with the body marginal edge portion, there being no rubbing movement between the endpiece 2 and apparatus for effecting the friction welding. The apparatus comprises a pressure tool 4, Fig. 4, rotatable in a housing 5 by a shaft 6 and a ball-race 7. A resilient member 8 thrusts the tool 4 against the endpiece 2 resting on an an abutment tool 9 rotatable on a fixed mandrel 10. The tool 9 is positioned inside the body 1 which is fitted into an external sleeve 11. In use, the tool 9 presses on the inside of the endpiece 2 thus increasing its initial diameter. The housing 5 is provided with an inlet 13 and an outlet 14 for compressed air to lubricate the tool 4, a circular relief 15 being provided for this purpose. In another embodiment, Fig. 5, the body is fitted over a fixed mandrel 16. Three constructions of container are illustrated, Figs. 1-3 (all not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7228664A FR2194547B1 (en) | 1972-08-03 | 1972-08-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1436217A true GB1436217A (en) | 1976-05-19 |
Family
ID=9103054
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3699373A Expired GB1436217A (en) | 1972-08-03 | 1973-08-03 | Pliable tubular con-ainers |
Country Status (15)
Country | Link |
---|---|
JP (1) | JPS58958B2 (en) |
AT (1) | AT343529B (en) |
AU (1) | AU5874073A (en) |
BE (1) | BE803152A (en) |
CA (1) | CA1009597A (en) |
CH (1) | CH578459A5 (en) |
DE (1) | DE2339502C2 (en) |
ES (1) | ES417384A1 (en) |
FR (1) | FR2194547B1 (en) |
GB (1) | GB1436217A (en) |
IL (1) | IL42835A (en) |
IT (1) | IT991470B (en) |
NL (1) | NL7310669A (en) |
SE (1) | SE393947B (en) |
ZA (1) | ZA735273B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4353761A (en) * | 1981-07-30 | 1982-10-12 | Boise Cascade Corporation | Method for spin bonding ends for composite containers |
US4832769A (en) * | 1987-05-19 | 1989-05-23 | A. R. D. Industries Ltd. | Friction welding flash trap seal and method of producing same |
US4944977A (en) * | 1987-05-19 | 1990-07-31 | A.R.D. Industries Ltd. | Friction welding flash trap seal |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS528329A (en) * | 1975-06-23 | 1977-01-22 | Voplex Corp | Process and tools for making cartridges |
US4352711A (en) * | 1981-06-15 | 1982-10-05 | Branson Ultrasonics Corporation | Friction welding apparatus |
SE464344B (en) * | 1988-02-18 | 1991-04-15 | Norden Pac Dev Ab | APPENDIX, PROCEDURES BEFORE ITS ASSEMBLY ON PIPE-SIZED SHELTERS AND DEVICE FOR IMPLEMENTATION OF THE PROCEDURE |
FR2753178B1 (en) * | 1996-09-11 | 1998-11-20 | Valois | RECEPTION CUP, DISTRIBUTION DEVICE EQUIPPED WITH SUCH A CUP AND METHOD FOR ASSEMBLING AND FILLING SUCH A DISTRIBUTION DEVICE |
CN101254648B (en) * | 2004-05-13 | 2011-12-21 | 艾萨帕克控股公司 | Container welding method |
CN116765580B (en) * | 2023-08-18 | 2023-12-01 | 布柯玛蓄能器张家口有限公司 | Welding process of diaphragm type accumulator shell |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO123244B (en) * | 1963-11-21 | 1971-10-18 | V Flax | |
FR1407064A (en) * | 1963-11-21 | 1965-07-30 | Method and tools for joining several pieces of heat-sealable material | |
CH493328A (en) * | 1969-06-04 | 1970-07-15 | Continental Plastic Ag | Process for manufacturing a thermoplastic tube, tooling for implementing this process and tube obtained by this process |
-
1972
- 1972-08-03 FR FR7228664A patent/FR2194547B1/fr not_active Expired
-
1973
- 1973-07-27 IL IL42835A patent/IL42835A/en unknown
- 1973-07-30 ES ES417384A patent/ES417384A1/en not_active Expired
- 1973-07-31 IT IT2731873A patent/IT991470B/en active
- 1973-07-31 AU AU58740/73A patent/AU5874073A/en not_active Expired
- 1973-08-01 NL NL7310669A patent/NL7310669A/xx not_active Application Discontinuation
- 1973-08-02 SE SE7310655A patent/SE393947B/en unknown
- 1973-08-02 ZA ZA735273A patent/ZA735273B/en unknown
- 1973-08-02 CA CA177,975A patent/CA1009597A/en not_active Expired
- 1973-08-02 BE BE134181A patent/BE803152A/en not_active IP Right Cessation
- 1973-08-03 DE DE2339502A patent/DE2339502C2/en not_active Expired
- 1973-08-03 JP JP48087444A patent/JPS58958B2/en not_active Expired
- 1973-08-03 GB GB3699373A patent/GB1436217A/en not_active Expired
- 1973-08-03 CH CH1134073A patent/CH578459A5/xx not_active IP Right Cessation
- 1973-08-03 AT AT686173A patent/AT343529B/en not_active IP Right Cessation
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4353761A (en) * | 1981-07-30 | 1982-10-12 | Boise Cascade Corporation | Method for spin bonding ends for composite containers |
FR2510469A1 (en) * | 1981-07-30 | 1983-02-04 | Boise Cascade Corp | METHOD AND APPARATUS FOR END ROTATING WELDING FOR COMPOSITE CONTAINERS AND PRODUCT OBTAINED |
US4832769A (en) * | 1987-05-19 | 1989-05-23 | A. R. D. Industries Ltd. | Friction welding flash trap seal and method of producing same |
US4944977A (en) * | 1987-05-19 | 1990-07-31 | A.R.D. Industries Ltd. | Friction welding flash trap seal |
Also Published As
Publication number | Publication date |
---|---|
FR2194547B1 (en) | 1977-04-01 |
JPS49133169A (en) | 1974-12-20 |
SE393947B (en) | 1977-05-31 |
ATA686173A (en) | 1977-09-15 |
IL42835A (en) | 1976-12-31 |
CH578459A5 (en) | 1976-08-13 |
AT343529B (en) | 1978-06-12 |
IL42835A0 (en) | 1973-10-25 |
FR2194547A1 (en) | 1974-03-01 |
DE2339502A1 (en) | 1974-02-14 |
JPS58958B2 (en) | 1983-01-08 |
AU5874073A (en) | 1975-02-06 |
IT991470B (en) | 1975-07-30 |
BE803152A (en) | 1973-12-03 |
ZA735273B (en) | 1974-07-31 |
NL7310669A (en) | 1974-02-05 |
ES417384A1 (en) | 1976-07-16 |
CA1009597A (en) | 1977-05-03 |
DE2339502C2 (en) | 1983-07-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19920803 |