US4110155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing synthetic resin coated papers
Assignee: Fujifilm Holdings Corp
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Filing: 1974-12-16
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Granted: 1978-08-29
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Expires: 1994-12-16
Abstract
Abstract In manufacturing a laminate of a paper substrate having synthetic resin films coated on the both surfaces, the formation of wavy deformations at the edges of the laminate is prevented by incorporating in the base paper sheet a deliquescent salt in an amount of from about 0.5 to 5% by weight based on the weight of the paper substrate.
Inventors
- 👤 Nobuhiko Minagawa
- 👤 Tomoaki Ozaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:55
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B32B27/32; D; D21; D21H; D21H27/00; D21H27/14; B32B2323/00; B32B2323/04; D21H11/00; D21H11/02; D21H11/04; D21H17/00; D21H17/63; D21H17/66; D21H21/00; D21H21/14; D21H21/16; D21H23/00; D21H23/02; D21H23/22; D21H23/46; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
126 words
In a method of manufacturing a laminate paper having a synthetic resin film coated on both surfaces of the paper substrate which comprises manufacturing a paper substrate and applying said resin film to both surfaces of said substrate, the same synthetic resin being applied to each surface, the improvement comprising preventing the occurrence of wavy deformations at or near the edge portions of the laminate paper by incorporating during manufacturing of said paper substrate a deliquescent salt in an amount of from about 0.5 to 5% by weight based on the weight of said paper substrate, and adjusting the water content of said paper substrate to 6 to 10% by weight during said manufacturing and applying said resin film while said substrate has said water content.
Claim 2
Dependent Claim
126 words
In a method of manufacturing a laminate paper having a synthetic resin film coated on both surfaces of the paper substrate which comprises manufacturing a paper substrate and applying said resin film to both surfaces of said substrate, the same synthetic resin being applied to each surface, the improvement comprising preventing the occurrence of wavy deformations at or near the edge portions of the laminate paper by incorporating during manufacturing of said paper substrate a deliquescent salt in an amount of from about 0.5 to 5% by weight based on the weight of said paper substrate, and adjusting the water content of said paper substrate to 6 to 10% by weight during said manufacturing and applying said resin film while said substrate has said water content.
Claim 3
Dependent Claim
17 words
The method of claim 1, wherein said deliquescent salt is calcium chloride, magnesium chloride or lithium chloride.
Claim 4
Dependent Claim
31 words
The method of claim 1, wherein said manufacturing includes a sizing step and wherein said deliquescent salt is incorporated in said paper substrate during the sizing step of manufacturing the paper.
Claim 5
Dependent Claim
18 words
The method of claim 3, wherein said deliquescent salt is incorporated using an aqueous solution of said salt.
Claim 6
Dependent Claim
28 words
The method of claim 1, wherein said deliquescent salt is incorporated in said paper substrate in the preparing of an aqueous paper pulp composition for manufacturing the paper.
Claim 7
Dependent Claim
21 words
The method of claim 1, wherein said deliquescent salt is incorporated in an amount of from 0.5 to 3% by weight.
Claim 8
Dependent Claim
67 words
A laminate paper having synthetic resin films coated on both surfaces of a paper substrate, the same synthetic resin being applied to each surface, said paper substrate containing a deliquescent salt at a level sufficient to adjust the water content of said paper substrate from about 6 to 10% by weight, said level being 0.5 to 5% by weight based on the weight of said paper substrate.
Claim 9
Dependent Claim
67 words
A laminate paper having synthetic resin films coated on both surfaces of a paper substrate, the same synthetic resin being applied to each surface, said paper substrate containing a deliquescent salt at a level sufficient to adjust the water content of said paper substrate from about 6 to 10% by weight, said level being 0.5 to 5% by weight based on the weight of said paper substrate.
Claim 10
Dependent Claim
30 words
The laminate paper having synthetic resin films coated on both surfaces of said paper substrate of claim 7, wherein said deliquescent salt is calcium chloride, magnesium chloride, or lithium chloride.
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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) | 1981-08-28 | 1982-02-27 | 1982-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-28 | 1986-02-27 | 1986-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-28 | 1990-02-27 | 1990-08-29 | $7700.00 | Window Closed / Lapsed |