US4129467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making packing containers
Assignee: Ziristor AB
•
Filing: 1977-04-20
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Granted: 1978-12-12
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Expires: 1997-04-20
Abstract
Abstract A packing container is formed from laminated material including a carrier layer of foamed plastics and has a generally tubular part and an end closure in the form of an end plate, the peripheral area of the latter is sealed to a region of the tubular part of the container at a region where the tubular part is folded in by shrinkage to fit against the underside of the end plate.
Inventors
- 👤 Kent I. Knutsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:14
CPC Classifications
B; B29; B29C; B29C61/00; B29C61/02; B29C61/025; B32; B32B; B32B27/00; B32B27/06; B32B27/065; B29C67/00; B29C69/00; B32B1/00; B32B1/08; B32B27/30; B32B27/302; B32B27/32; B65; B65D; B65D11/00; B65D11/02; B29C48/00; B29C48/001; B29C48/0012; B29C48/0017; B29C48/0018; B29C48/03; B29C48/09; B29K; B29K2105/00; B29K2105/04; B32B2307/00; B32B2307/30; B32B2307/31; B32B2439/00; B32B2439/40; B32B2597/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1036; Y10T156/1038
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
272 words
A method for making, filling and sealing packing containers for liquids composed of a heatshrinkable laminated material having a base layer of foamed plastic and at least one layer of a thermoplastic, heatsealable material, said method comprising: wrapping a strip of the laminated material about a cylindrical mandrel to overlap the opposed ends of the strip, heating the overlapping end portions of the strip to heat seal the strip end portions together to form a tubular member, moving said tubular member relative to the mandrel so that one end thereof extends beyond the corresponding end of said mandrel, placing a bottom forming plate member against the end of the mandrel, the plate member having a diameter not greater than the diameter of the end of the mandrel, heating the extended end of the tubular member of laminated material to shrink the extended end portion of the tubular member inwardly to embrace the marginal surface of the plate member and to heat seal the inwardly shrunk end of the tubular member to the marginal surface of the plate member to form a seal, applying pressure to the end of the tubular member and plate member while still in a heated condition, to provide a liquid tight seal therebetween and to provide the base portion of the container with a flat, substantially uniform surface for stability, removing the container from the mandrel, filling the container with liquid contents, heating the upper edge of the container to a heat-sealing temperature, and pressing a lid member thereonto in abutting relation to the heated upper edge of the filled container to form a liquid-tight butt seal therewith.
Claim 2
Independent Claim
272 words
A method for making, filling and sealing packing containers for liquids composed of a heatshrinkable laminated material having a base layer of foamed plastic and at least one layer of a thermoplastic, heatsealable material, said method comprising: wrapping a strip of the laminated material about a cylindrical mandrel to overlap the opposed ends of the strip, heating the overlapping end portions of the strip to heat seal the strip end portions together to form a tubular member, moving said tubular member relative to the mandrel so that one end thereof extends beyond the corresponding end of said mandrel, placing a bottom forming plate member against the end of the mandrel, the plate member having a diameter not greater than the diameter of the end of the mandrel, heating the extended end of the tubular member of laminated material to shrink the extended end portion of the tubular member inwardly to embrace the marginal surface of the plate member and to heat seal the inwardly shrunk end of the tubular member to the marginal surface of the plate member to form a seal, applying pressure to the end of the tubular member and plate member while still in a heated condition, to provide a liquid tight seal therebetween and to provide the base portion of the container with a flat, substantially uniform surface for stability, removing the container from the mandrel, filling the container with liquid contents, heating the upper edge of the container to a heat-sealing temperature, and pressing a lid member thereonto in abutting relation to the heated upper edge of the filled container to form a liquid-tight butt seal therewith.
Claim 3
Dependent Claim
37 words
A method as claimed in claim 1 wherein the heating of the overlapping portions of the strip of laminated material and the heating of the extended end of the tubular member are carried out with heated air.
Claim 4
Independent Claim
309 words
A method for making, filling and sealing packing containers to liquids composed of a heat shrinkable laminated material having a base layer of foamed plastic material and at least one layer of a thermoplastic, heat sealable material, said method comprising: wrapping a strip of the laminated material about the cylindrical portion of a cylindrical mandrel having a truncated conical portion at one end thereof to overlap the opposed ends of said strip, heating the overlapping end portions of the strip to heat seal the strip end portions together to form a tubular member, moving said tubular member relative to the mandrel so that one end thereof extends beyond the conical end portion of said mandrel, placing a bottom forming plate member against the truncated conical end of the cylindrical mandrel, the plate member having a diameter not greater than the diameter of the truncated conical end of the mandrel, heating the extended end of the tubular member of laminated material to shrink the laminated material to conform with the conical portion of the mandrel and to shrink the extended end portion of the tubular member inwardly to embrace the marginal surface of the plate member and to heat seal the inwardly shrunk end of the tubular member to the marginal surface of the plate member to form a seal, applying pressure to the end of the tubular member and plate member while still in a heated condition to provide a liquid tight seal therebetween and to provide the base portion of the container with a flat, substantially uniform surface for stability, removing the container from the mandrel, filling the container with liquid contents, heating the upper edge of the container to a heatsealing temperature, and pressing a lid member thereonto in abutting relation to the heated upper edge of the filled container to form a liquid-tight butt seal therewith.
Claim 5
Independent Claim
309 words
A method for making, filling and sealing packing containers to liquids composed of a heat shrinkable laminated material having a base layer of foamed plastic material and at least one layer of a thermoplastic, heat sealable material, said method comprising: wrapping a strip of the laminated material about the cylindrical portion of a cylindrical mandrel having a truncated conical portion at one end thereof to overlap the opposed ends of said strip, heating the overlapping end portions of the strip to heat seal the strip end portions together to form a tubular member, moving said tubular member relative to the mandrel so that one end thereof extends beyond the conical end portion of said mandrel, placing a bottom forming plate member against the truncated conical end of the cylindrical mandrel, the plate member having a diameter not greater than the diameter of the truncated conical end of the mandrel, heating the extended end of the tubular member of laminated material to shrink the laminated material to conform with the conical portion of the mandrel and to shrink the extended end portion of the tubular member inwardly to embrace the marginal surface of the plate member and to heat seal the inwardly shrunk end of the tubular member to the marginal surface of the plate member to form a seal, applying pressure to the end of the tubular member and plate member while still in a heated condition to provide a liquid tight seal therebetween and to provide the base portion of the container with a flat, substantially uniform surface for stability, removing the container from the mandrel, filling the container with liquid contents, heating the upper edge of the container to a heatsealing temperature, and pressing a lid member thereonto in abutting relation to the heated upper edge of the filled container to form a liquid-tight butt seal therewith.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-11 | 1982-06-12 | 1982-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-11 | 1986-06-12 | 1986-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-11 | 1990-06-12 | 1990-12-12 | $7700.00 | Window Closed / Lapsed |