US4032684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated backing structure for composite lithographic plate
Assignee: Rjr Archer Inc
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Filing: 1976-09-10
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Granted: 1977-06-28
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Expires: 1996-09-10
Abstract
Abstract A method of manufacturing a composite lithographic product for use in medium to long-run printing applications consisting of the steps of providing a sheet of metal of between 0.004 to 0.008 inch thick and having a lithographic quality surface, treating at least one surface of the metal sheet to accept a sensitizing coating, providing a backing sheet and laminating the backing sheet to the untreated surface of the metal sheet.
Inventors
- 👤 Richard Harry Dunnington
- 👤 Carl Michael Viglianco
- 👤 George Rudolph Wilkens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:28
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/12; B32B15/08; B32B27/00; B32B27/06; B32B27/10; B32B27/32; B32B38/00; B32B38/0004; B32B7/00; B32B7/04; B32B7/12; B41; B41N; B41N1/00; B41N1/04; B41N1/08; B41N1/086; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; B32B2323/00; B32B2323/04; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/31504; Y10T428/3154; Y10T428/31652; Y10T428/31663; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31699; Y10T428/31725; Y10T428/3175; Y10T428/31754; Y10T428/31768; Y10T428/31772; Y10T428/31775; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31909; Y10T428/31913; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
145 words
A laminated backing structure for a composite lithographic plate comprising a metal sheet and a backing structure which laminated backing structure comprises: (a) bonding layer consisting essentially of a thermoplastic resin bondable to the back of a lithographic grade metal sheet under the influence of heat and pressure; (b) an intermediate filler layer of a normally solid flexible organic polymeric material, which layer is resistant to water, ink and grease to provide a selected thickness to said backing structure; (c) an outer interleaving layer of a thermoplastic or thermosetting organic polymer having a smooth non-scuff surface which does not adhere to the metal surface of a metal surfaced lithographic plate under ambient conditions, and which does not become tacky under the conditions necessary to bond the bonding layer (a) to a lithographic metal sheet; said layers being bonded together to form a coherent laminated structure.
Claim 2
Dependent Claim
145 words
A laminated backing structure for a composite lithographic plate comprising a metal sheet and a backing structure which laminated backing structure comprises: (a) bonding layer consisting essentially of a thermoplastic resin bondable to the back of a lithographic grade metal sheet under the influence of heat and pressure; (b) an intermediate filler layer of a normally solid flexible organic polymeric material, which layer is resistant to water, ink and grease to provide a selected thickness to said backing structure; (c) an outer interleaving layer of a thermoplastic or thermosetting organic polymer having a smooth non-scuff surface which does not adhere to the metal surface of a metal surfaced lithographic plate under ambient conditions, and which does not become tacky under the conditions necessary to bond the bonding layer (a) to a lithographic metal sheet; said layers being bonded together to form a coherent laminated structure.
Claim 3
Dependent Claim
23 words
The laminated backing structure of claim 1 wherein the bonding layer is an ionomeric salt of a copolymer of ethylene and acrylic acid.
Claim 4
Dependent Claim
27 words
The laminated backing structure of claim 1 where the intermediate filler layer is a water, ink and grease resistant fluorocarbon treated paper at least 0.001 inches thick.
Claim 5
Dependent Claim
13 words
The backing structure of claim 1 wherein said interleaving layer is polyethylene film.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |