Patent US4085245A successfully refreshed from Google Patents.
US4085245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparencies for color xerographic copies
Assignee: Xerox Corp
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Filing: 1976-04-15
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Granted: 1978-04-18
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Expires: 1996-04-15
Abstract
Abstract Disclosed is a transparency for use in electrostatographic reproduction, particularly in the multi-color mode of such reproduction. The transparency comprises: A) a base of transparent polyester sheet; B) a second layer adherent to the surface of said polyester sheet of a mixture of an acrylic polymer and a copolymer of vinyl acetate and vinyl chloride said second layer having uniformly dispersed therein: I. particulate silica having a particle size range of from about 2 to 70 millimicrons in its longest dimension and being present in an amount of from about 0.25 to 1.5 weight percent of said second layer, and Ii. a salt formed from an anion of a carboxylic acid having 1 to 37 carbon atoms or a dimeric fatty acid having 12 to 36 carbon atoms and a cation characterized by the formula: ##STR1## wherein R 1 is a saturated straight chained or branched chain aliphatic hydrocarbon radical of 2 to 24 carbon atoms or an unsaturated straight chained or branched chain hydrocarbon radical of 3 to 24 carbon atoms, a is 2 or 3 and m is a number from 2 to 40.
Inventors
- 👤 Michael G. De Vito
- 👤 Francis J. Wieloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:23
CPC Classifications
G; G03; G03G; G03G7/00; G03G7/0006; G03G7/0013; G03G7/002; G03G7/0026; G03G7/004; G03G7/006; G03G7/0073; G03G7/008; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/25; Y10T428/259; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/266; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
167 words
A transparency for use in electrostatographic copying which comprises: a) a base layer of a transparent, heat stabilized polyester sheet, b) a second layer adherent to the surface of said polyester sheet of a mixture of an acrylic polymer and a copolymer of vinyl acetate and vinyl chloride said layer having uniformly dispersed therein: i. particulate silica having a mean particle size of from about 2 to 70 millimicrons in its longest dimension and being present in an amount of from about 0.25 to about 1.5 weight percent of said second layer, and ii. an anti-static agent of a salt formed from an anion of a carboxylic acid having 1 to 37 carbon atoms or a dimeric fatty acid having 12 to 36 carbon atoms and a cation characterized by the formula: ##STR4## wherein R 1 is a saturated straight chained or branched chain aliphatic hydrocarbon radical of 3 to 24 carbon atoms, a is 2 or 3 and m is a number from 2 to 40.
Claim 2
Dependent Claim
167 words
A transparency for use in electrostatographic copying which comprises: a) a base layer of a transparent, heat stabilized polyester sheet, b) a second layer adherent to the surface of said polyester sheet of a mixture of an acrylic polymer and a copolymer of vinyl acetate and vinyl chloride said layer having uniformly dispersed therein: i. particulate silica having a mean particle size of from about 2 to 70 millimicrons in its longest dimension and being present in an amount of from about 0.25 to about 1.5 weight percent of said second layer, and ii. an anti-static agent of a salt formed from an anion of a carboxylic acid having 1 to 37 carbon atoms or a dimeric fatty acid having 12 to 36 carbon atoms and a cation characterized by the formula: ##STR4## wherein R 1 is a saturated straight chained or branched chain aliphatic hydrocarbon radical of 3 to 24 carbon atoms, a is 2 or 3 and m is a number from 2 to 40.
Claim 3
Dependent Claim
18 words
The transparency of claim 1 wherein the thickness of the second layer is from 0.05 to 0.5 mil.
Claim 4
Dependent Claim
14 words
The transparency of claim 1 wherein the thickness is from 0.1 to 0.4 mil.
Claim 5
Dependent Claim
21 words
The transparency of claim 1 wherein R 1 is C 4 H 9 , a is 2 and m is 10.
Claim 6
Dependent Claim
38 words
The transparency of claim 1 wherein the polyester is a highly polymerized ester of terephthalic acid and a glycol of the series HO 2n OH wherein n is a number in the range of from 2 to 10.
Claim 7
Dependent Claim
32 words
The transparency of claim 5 wherein the polyester is capable of forming a sheet exhibiting cross and trans direction shrinkage of less than 1.0% when maintained at 170° C for 30 minutes.
Claim 8
Dependent Claim
18 words
The transparency of claim 5 wherein the polyester sheet has a thickness of from 2 to 7 mils.
Claim 9
Dependent Claim
16 words
The transparency of claim 1 wherein the acrylic resin in the second layer is poly(n-alkyl methacrylate).
Claim 10
Dependent Claim
13 words
The transparency of claim 8 wherein the poly (n-alkyl methacrylate) is poly(n-butyl methacrylate).
Claim 11
Dependent Claim
24 words
The transparency of claim 1 wherein the weight ratio of the acrylic resin to the vinyl acetate/vinyl chloride copolymer is from 40:60 to 80:20.
Claim 12
Dependent Claim
11 words
The transparency of claim 10 wherein the weight ratio is 70:30.
Claim 13
Dependent Claim
25 words
The transparency of claim 1 wherein the anti-static agent is present in an concentration of from 2.5 to 12.5 weight percent of the second layer.
Claim 14
Dependent Claim
21 words
The transparency of claim 12 wherein the anti-static agent is present in an amount of from 6 to 9 weight percent.
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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) | 1981-04-17 | 1981-10-17 | 1982-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-17 | 1985-10-17 | 1986-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-17 | 1989-10-17 | 1990-04-18 | $7700.00 | Window Closed / Lapsed |