US3785899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of cellular material for cushioning and other purposes
Assignee: Sealed Air Corp
•
Filing: 1971-06-08
•
Granted: 1974-01-15
•
Expires: 1991-06-08
Abstract
Abstract Method and apparatus for the manufacture of a cellular material which utilizes an embossing roller to emboss at least one film after being preheated to an embossing temperature. At least the embossed sheet preferably includes a coating of adhesive which is reactivated during the preheating procedure so that upon applying a second unheated film to the embossed film the individual embossments will be sealed. The preheating means is arranged so that it can be moved out of its normal operating position in order to enable termination of the embossing and sealing process, and means are utilized to rapidly interchange the embossing rollers to minimize the down time for the apparatus.
Inventors
- 👤 A Fielding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:04
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29C43/30; B29C43/305; B32; B32B; B32B7/00; B32B7/04; B32B7/12; B32B7/14; B29C51/00; B29C51/18; B29C51/20; B29C51/22; B29C51/225; B31; B31F; B31F1/00; B31F1/07; B32B3/00; B32B3/26; B32B3/28; B31F2201/00; B31F2201/07; B31F2201/0707; B31F2201/0715; B31F2201/0753; B31F2201/0756; B31F2201/0758; B31F2201/0761; B31F2201/0771; B31F2201/0776; B31F2201/0782; B31F2201/0784; B31F2201/0787; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1023; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1737
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
28 words
The method according to claim 1 including the step of applying said adhesive coating to the first said sheet immediately prior to the movement thereof about said roller.
Claim 2
Dependent Claim
42 words
The method according to claim 2 wherein said adhesive is selected from the group consisting of thermoplastic polyurethanes, polyvinyl acetates, polyvinyl acetate-ethylene copolymers, polyvinylidene chloride and blends thereof, polyvinyl acetate acrylate copolymers, nitrile rubber polymers linear saturated polyesters and complex acrylic interpolymers.
Claim 3
Dependent Claim
36 words
The method according to claim 1 wherein said adhesive is selected from the group consisting of thermoplastic polyurethanes, polyvinyl acetates, polyvinyl acetate-ethylene copolymers, polyvinylidene chloride and blends thereof, polyvinyl acetate acrylate copolymers and nitrile rubber polymers.
Claim 4
Independent Claim
112 words
The method for manufacturing cellular cushioning material comprising the steps of continuously moving a sheet of plastic having an activatable adhesive on at least one surface thereof though a predetermined path and about an embossing roller, moving a heater from a position displaced from said sheet to a position in close proximity to said sheet to heat said sheet above the embossing temperature and the activating temperature of said adhesive, embossing said sheet on the embossing roller with the activated adhesive coating exposed and then adhering a second sheet of material to the embossed sheet, said method further including the step of heating the first said sheet while on the embossing roller.
Claim 5
Dependent Claim
28 words
The method according to claim 5 including the step of applying said adhesive coating to the first said sheet immediately prior to the movement thereof about said roller.
Claim 6
Dependent Claim
42 words
The method according to claim 6 wherein said adhesive is selected from the group consisting of thermoplastic polyurethanes, polyvinyl acetates, polyvinyl acetate-ethylene copolymers, polyvinylidene chloride and blends thereof, polyvinyl acetate acrylate copolymers, nitrile rubber polymers, linear saturated polyesters and complex acrylic interpolymers.
Claim 7
Dependent Claim
36 words
The method according to claim 5 wherein said adhesive is selected from the group consisting of thermoplastic polyurethanes, polyvinyl acetates, polyvinyl acetate-ethylene copolymers, polyvinylidene chloride and blends thereof, polyvinyl acetate acrylate copolymers and nitrile rubber polymers.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |