US3836414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for eliminating bubbles in laminates
Assignee: General Binding Corp
•
Filing: 1971-06-11
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Granted: 1974-09-17
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Expires: 1991-06-11
Abstract
Abstract This invention provides a method of producing substantially bubble-free laminates for identification cards, photographs and the like which eliminates randomly disposed entrapped air bubbles heretofore found, which method comprises providing a texture in the heat-sealing surface of the laminate film prior to lamination pressurization with the card.
Inventors
- 👤 H Staats
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:42
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/10; B32B27/32; B32B27/36; B32B37/00; B32B37/0007; B32B2323/00; B32B2323/04; B32B2367/00; B32B2425/00; Y; Y10; Y10S; Y10S156/00; Y10S156/918; Y10S156/919; Y10S156/922; Y10T; Y10T156/00; Y10T156/11; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/3179; Y10T428/31797
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
14 words
A method according to claim 1 wherein said plastic laminate film is polyethylene terephthalate.
Claim 2
Dependent Claim
12 words
A method according to claim 1, wherein the heat-sealing surface is polyethylene.
Claim 3
Dependent Claim
15 words
A method according to claim 1, wherein the heat-sealing surface is an ethylene-ethyl acrylate copolymer.
Claim 4
Dependent Claim
54 words
A method according to claim 1, wherein the heat-sealing surface of said film is texturized by placing a release paper against the heat-sealing surface of said film, and applying a sufficient amount of pressure to the film and paper to impress the texture of the release paper into the heat-sealing surface of the film.
Claim 5
Dependent Claim
35 words
A method according to claim 5, wherein heat is applied in combination with the pressure to the film and release paper to impress the texture of the paper into the heat-sealing surface of the film.
Claim 6
Dependent Claim
19 words
A method according to claim 5, wherein the texture impressed into said heat-sealing surface is a pattern of pathways.
Claim 7
Independent Claim
83 words
A method of producing a substantially bubble-free laminate of plastic film for identification cards, photographs and the like, said method comprises: (a) placing a release paper against the heat-sealing surface of said plastic film; (b) applying a sufficient amount of heat and pressure to the film and paper to impress the texture of the release paper into the heat-sealing surface of the plastic film, and replacing the release paper with said identification card; and (c) laminating said identification card to said plastic film.
Claim 8
Dependent Claim
19 words
A method according to claim 8, wherein said plastic film is polyethylene terephthalate and said heat-sealing surface is polyethylene.
Claim 9
Dependent Claim
19 words
A method according to claim 8, wherein the texture impressed into said heat-sealing surface is a pattern of pathways.
References Cited (Backward Citations)
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US3069793A
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US3279826A
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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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |