Patent US3873409A successfully refreshed from Google Patents.
US3873409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat sealable sheet material
Assignee: Individual
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Filing: 1972-12-13
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Granted: 1975-03-25
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Expires: 1992-12-13
Abstract
Abstract A non-flammable, heat-sealable sheet material comprised of a layer of man-made fabric laminated to a metal foil via the intermediary of a heat-sealable coating. The fabric is a polyester, the foil is aluminum, the heat-sealable coating material is polyvinyl chloride and a network of intersecting reinforcing threads are disposed between the fabric and foil.
Inventors
- 👤 Andre Jehier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:17
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/082; B32B15/20; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/304; B32B27/36; F; F16; F16L; F16L59/00; B32B2305/00; B32B2305/08; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T442/00; Y10T442/30; Y10T442/3382; Y10T442/3415; Y10T442/60; Y10T442/608; Y10T442/654
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
105 words
A LIGHTWEIGHT, NONFLAMMABLE, HEAT-SEALABLE SHEET MATERIAL COMPRISING: A FIRST LAYER OF POLYESTER FABRIC; A SECOND LAYER COMPRISED OF A THIN ALUMINUM FOIL, SAID FIRST AND SECOND LAYERS BEIG LAMINATED TO ONE ANOTHER BY THE APPLICATION OF HEAT AND PRESSURE; A REINFORCING NETWORK OF TWISTED MULTI-STRAND THREADS DISPOSED BETWEEN SAID FIRST AND SECOND LAYERS, EACH THREAD OF SAID REINFORCING NETWORK BEING COMPRISED OF A PLURALITY OF STRANDS, THE STRANDS OF SAID PLURALITY INCLUDING AT LEAST ONE STRAND OF POLYESTER AND ONE STRAND OF POLYVINYL CHLORIDE; AND A COATING OF HEAT-SEALABLE POLYVINYL CHLORIDE ON THE EXPOSED SURFACE OF AT LEAST ONE OF SAID FIRST AND SECOND LAYERS.
Claim 2
Dependent Claim
105 words
A LIGHTWEIGHT, NONFLAMMABLE, HEAT-SEALABLE SHEET MATERIAL COMPRISING: A FIRST LAYER OF POLYESTER FABRIC; A SECOND LAYER COMPRISED OF A THIN ALUMINUM FOIL, SAID FIRST AND SECOND LAYERS BEIG LAMINATED TO ONE ANOTHER BY THE APPLICATION OF HEAT AND PRESSURE; A REINFORCING NETWORK OF TWISTED MULTI-STRAND THREADS DISPOSED BETWEEN SAID FIRST AND SECOND LAYERS, EACH THREAD OF SAID REINFORCING NETWORK BEING COMPRISED OF A PLURALITY OF STRANDS, THE STRANDS OF SAID PLURALITY INCLUDING AT LEAST ONE STRAND OF POLYESTER AND ONE STRAND OF POLYVINYL CHLORIDE; AND A COATING OF HEAT-SEALABLE POLYVINYL CHLORIDE ON THE EXPOSED SURFACE OF AT LEAST ONE OF SAID FIRST AND SECOND LAYERS.
Claim 3
Dependent Claim
32 words
The sheet material of claim 1 wherein said first and second layers are joined by an intermediary of a layer of polyvinyl chloride, said reinforcing network being encapsulated in said intermediate layer.
Claim 4
Dependent Claim
24 words
The heat-sealable sheet material of claim 1 wherein said reinforcing network is comprised of a plurality of threads which define a regular intersecting pattern.
Claim 5
Dependent Claim
32 words
The sheet material of claim 3 wherein said first and second layers are joined by an intermediary of a layer of polyvinyl chloride, said reinforcing network being encapsulated iN said intermediate layer.
Claim 6
Independent Claim
116 words
A method of manufacturing a heat-sealable sheet material comprising the steps of: applying a coating of polyvinyl chloride to the oppositely disposed surfaces of a sheet of aluminum; applying a reinforcing network of multi-stranded threads to one of said coated aluminum sheet surfaces, the application of said reinforcing network including the twisting together of at least two strands, one of said strands being comprised of polyester and another of said strands being comprised of polyvinyl chloride; applying a sheet of polyester over said network of threads; and subjecting the composite to a temperature in excess of the melting temperature of polyvinyl chloride and less than the melting temperature of the polyester while simultaneously compressing the laminate.
Claim 7
Independent Claim
116 words
A method of manufacturing a heat-sealable sheet material comprising the steps of: applying a coating of polyvinyl chloride to the oppositely disposed surfaces of a sheet of aluminum; applying a reinforcing network of multi-stranded threads to one of said coated aluminum sheet surfaces, the application of said reinforcing network including the twisting together of at least two strands, one of said strands being comprised of polyester and another of said strands being comprised of polyvinyl chloride; applying a sheet of polyester over said network of threads; and subjecting the composite to a temperature in excess of the melting temperature of polyvinyl chloride and less than the melting temperature of the polyester while simultaneously compressing the laminate.
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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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |