Patent US4645731A successfully refreshed from Google Patents.
US4645731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distortion resistant polyester support for use as a phototool
Assignee: EIDP Inc
•
Filing: 1985-12-27
•
Granted: 1987-02-24
•
Expires: 2005-12-27
Abstract
Abstract Photosensitive element comprising a polyester, e.g., polyethylene terephthalate, at least 0.008 inch (0.20 mm) thick bearing on both sides a polymeric water-vapor barrier layer at least 0.00001 inch (0.00025 mm) thick of a copolymer of vinylidene chloride containing at least 80% by weight of vinylidene chloride and minor amounts of alkyl acrylate, and itaconic acid, and on at least one side of said barrier layer, a layer of a photosensitive material, e.g., silver halide emulsion, diazo or photopolymer. The element in the form of a phototool limits dimensional change within 6 hours after exposure to a 5% Relative Humidity change to no more than 0.001 inch (0.025 mm) per 24 inches (60.96 cm).
Inventors
- 👤 John H. Bayless
- 👤 Neil I. Steinberg
- 👤 James H. Thirtle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:44
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/795; G03C1/7954; G03C1/775; G03C1/79
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
124 words
A photosensitive element which limits dimensional change to no more than 0.001 inch per 24 inches within six hours after exposure to a 5% Relative Humidity change comprising a biaxially oriented polyester support of at least 0.008 inch in thickness bearing on both sides thereof a polymeric water-vapor barrier layer consisting essentially of at least 0.00001 inch thick of a copolymer of vinylidene chloride consisting essentially of 80 to 98% by weight of vinylidene chloride 1 to 19% by weight of an alkyl acrylate wherein alkyl is 1 to 4 carbon atoms, and 1 to 5% by weight of itaconic acid to which subsequently coated layers adhere, and on at least one side of said water-vapor barrier layer, a layer of a photosensitive material.
Claim 2
Dependent Claim
124 words
A photosensitive element which limits dimensional change to no more than 0.001 inch per 24 inches within six hours after exposure to a 5% Relative Humidity change comprising a biaxially oriented polyester support of at least 0.008 inch in thickness bearing on both sides thereof a polymeric water-vapor barrier layer consisting essentially of at least 0.00001 inch thick of a copolymer of vinylidene chloride consisting essentially of 80 to 98% by weight of vinylidene chloride 1 to 19% by weight of an alkyl acrylate wherein alkyl is 1 to 4 carbon atoms, and 1 to 5% by weight of itaconic acid to which subsequently coated layers adhere, and on at least one side of said water-vapor barrier layer, a layer of a photosensitive material.
Claim 3
Dependent Claim
59 words
A photosensitive element according to claim 1 wherein the polyester support contains repeating units of the structure ##STR4## wherein R is an alkylene group of from 2 to 10 carbon atoms a cycloalkylene group of from 6 to 10 carbon atoms or an arylene group of from 6 to 20 carbon atoms and Ar is either phenylene or naphthylene.
Claim 4
Dependent Claim
14 words
A photosensitive element according to claim 2 wherein the polyester support is polyethylene terephthalate.
Claim 5
Dependent Claim
34 words
A photosensitive element according to claim 1 wherein the polymeric water-vapor barrier layer is a copolymer of vinylidene chloride/methyl acrylate/itaconic acid, the percentage amount of the copolymer components being 92.6, 5.4 and 2.0, respectively.
Claim 6
Dependent Claim
27 words
A photosensitive element according to claim 1 wherein the support is 0.0085 inch thick coated with a polymeric water-vapor barrier layer having a thickness of 0.0001 inch.
Claim 7
Dependent Claim
14 words
A photosensitive element according to claim 1 wherein a gelatin backing layer is present.
Claim 8
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the photosensitive material is a photographic silver halide emulsion.
Claim 9
Dependent Claim
15 words
A photosensitive element according to claim 1 wherein the photosensitive material is a photopolymerizable composition.
Claim 10
Dependent Claim
15 words
A photosensitive element according to claim 1 wherein the photosensitive material is a photocrosslinkable composition.
Claim 11
Dependent Claim
125 words
A photographic element which limits dimensional change to no more than 0.001 inch per 24 inches within six hours after exposure to a 5% Relative Humidity change comprising a polyester support of 0.008 to 0.015 inch bearing on both sides thereof a polymeric water-vapor barrier layer consisting essentially of 0.00001 to 0.0002 inch thick which is a copolymer of vinylidene chloride consisting essentially of 80 to 98% by weight vinylidene chloride 1 to 19% by weight of methyl acrylate and 1 to 5% by weight of itaconic acid, to which subsequently coated layers adhere, the element having, in order, on one water-vapor barrier layer a gelatino sublayer and a gelatino silver halide emulsion layer, and on the other water-vapor barrier layer a gelatin backing layer.
Claim 12
Dependent Claim
125 words
A photographic element which limits dimensional change to no more than 0.001 inch per 24 inches within six hours after exposure to a 5% Relative Humidity change comprising a polyester support of 0.008 to 0.015 inch bearing on both sides thereof a polymeric water-vapor barrier layer consisting essentially of 0.00001 to 0.0002 inch thick which is a copolymer of vinylidene chloride consisting essentially of 80 to 98% by weight vinylidene chloride 1 to 19% by weight of methyl acrylate and 1 to 5% by weight of itaconic acid, to which subsequently coated layers adhere, the element having, in order, on one water-vapor barrier layer a gelatino sublayer and a gelatino silver halide emulsion layer, and on the other water-vapor barrier layer a gelatin backing layer.
References Cited (Backward Citations)
US3271178A
Cited
US3434840A
Cited
US4196001A
Cited
US4002802A
Cited
US4254210A
Cited
US4287278A
Cited
US4407938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |