Patent CA1022497A successfully refreshed from Google Patents.
Patent US4734356A successfully refreshed from Google Patents.
US4734356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positive-working color proofing film and process
Assignee: EIDP Inc
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Filing: 1986-04-30
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Granted: 1988-03-29
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Expires: 2006-04-30
Abstract
Abstract Photopolymer positive surprint color proofing film based on epoxy acrylate monomer exhibits low dot gain, low time dependence of toning and good tonal range. Binder can be methylmethacrylate/ethyl acrylate/acrylic acid copolymer, preferably crosslinked with zinc ions and plasticized with a second acrylate monomer and a mixture of triacetin and trimethylol propane.
Inventors
- 👤 Richard D. Bauer
- 👤 John G. Buzzell
- 👤 Rusty E. Koenigkramer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:27
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F3/00; G03F3/10; G03F3/103
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
168 words
An improved positive surprint process of making a multi-color proof by the steps: (a) laminating to paper the tacky photopolymerizable layer of a film composed of that layer and a transparent support layer: (b) imagewise exposing the photopolymerizable layer to UV light through a color-separation halftone-positive transparency to cause polymerization and reduce tack in the exposed areas so that toner particles will not adhere to those areas; (c) removing the support layer without disturbing the photopolymer layer; (d) applying process-color toner to the photopolymer layer whereby the toner adheres to the unexposed areas only; (e) removing non-adhered toner particles to leave a positive image; and (f) laminating to the toned photopolymer layer the photopolymerizable layer of another piece of the film and repeating steps (b)-(e) using a different color separation transparency and corresponding color toner; the improvement characterized in that the photopolymerizable layer consists essentially of a monomer which is a diacrylate or dimethacrylate ester of bisphenol A/epichlorohydrin epoxy resin, a compatible polymeric binder, and a photopolymerization initiator.
Claim 2
Dependent Claim
168 words
An improved positive surprint process of making a multi-color proof by the steps: (a) laminating to paper the tacky photopolymerizable layer of a film composed of that layer and a transparent support layer: (b) imagewise exposing the photopolymerizable layer to UV light through a color-separation halftone-positive transparency to cause polymerization and reduce tack in the exposed areas so that toner particles will not adhere to those areas; (c) removing the support layer without disturbing the photopolymer layer; (d) applying process-color toner to the photopolymer layer whereby the toner adheres to the unexposed areas only; (e) removing non-adhered toner particles to leave a positive image; and (f) laminating to the toned photopolymer layer the photopolymerizable layer of another piece of the film and repeating steps (b)-(e) using a different color separation transparency and corresponding color toner; the improvement characterized in that the photopolymerizable layer consists essentially of a monomer which is a diacrylate or dimethacrylate ester of bisphenol A/epichlorohydrin epoxy resin, a compatible polymeric binder, and a photopolymerization initiator.
Claim 3
Dependent Claim
14 words
Process of claim 1 wherein the polymeric binder consists essentially of methylmethacrylate/ethylacrylate/acrylic acid copolymer.
Claim 4
Dependent Claim
37 words
Process of claim 2 wherein the photopolymerizable layer also contains a first plasticizer for the binder and a di-, tri- or tetra-acrylate or -methacrylate which is a second monomer and also a second plasticizer for the binder.
Claim 5
Dependent Claim
23 words
Process of claim 3 wherein the copolymer is crosslinked with zinc ions and the first plasticizer is a mixture of triacetin and trimethylolpropane.
Claim 6
Dependent Claim
10 words
Process of claim 4 wherein the second monomer is trimethylolpropanetrimethacrylate.
Claim 7
Dependent Claim
20 words
Process of claim 1 wherein step (f) is repeated one or more times using a different process-color toner each time.
Claim 8
Dependent Claim
29 words
Process of claim 6 wherein step (f) is repeated two times to produce a 4-color proof and toners applied in step (d) are yellow, magenta, cyan and black toner.
Claim 9
Dependent Claim
14 words
Process of claim 7 wherein the polymeric binder consists essentially of methylmethacrylate/ethylacrylate/acrylic acid copolymer.
Claim 10
Dependent Claim
38 words
Process of claim 8 wherein the photopolymerizable layer also contains a first plasticizer for the binder and a di-, tri- or tetra- acrylate or -methacrylate which is a second monomer and also a second plasticizer for the binder.
Claim 11
Dependent Claim
23 words
Process of claim 9 wherein the copolymer is crosslinked with zinc ions and the first plasticizer is a mixture of triacetin and trimethylolpropane.
Claim 12
Dependent Claim
10 words
Process of claim 10 wherein the second monomer is trimethylyolpropanetrimethacrylate.
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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) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |