US4012255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overcoated electrostatographic photoreceptor
Assignee: Xerox Corp
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Filing: 1976-05-06
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Granted: 1977-03-15
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Expires: 1996-05-06
Abstract
Abstract Disclosed is a novel overcoating material for electrostatographic photoreceptors. The composition comprises an organic, crosslinkable, polymeric composition having dispersed therein a particulate, wax-like, normally solid, low molecular weight tetrafluoroethylene telomer. Application of the composition to an electrostatographic photoreceptor to form a thin uniform layer results in improvement in copy quality and reduction in surface friction of the device. When the photoreceptor employs a selenium/arsenic alloy as the photoconductor, print deletions normally associated with the photoconductor are eliminated.
Inventors
- 👤 Thomas B. McMullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:51
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/147; G03G5/14708; G03G5/14713; G03G5/14717; G03G5/14734; G03G5/14726; G03G5/14791; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
118 words
An improved electrostatographic photoreceptor which comprises: a. a conductive substrate; b. a layer of an alloy of selenium and arsenic as photoconductive insulating material in operative contact with the conductive substrate; and c. an overcoating uniformly covering the exposed surface of said photoconductive material, the overcoating comprising: I. an organic material comprising a crosslinkable polymeric composition of: i. a first polymer which is the addition polymerization product of methyl methacrylate, n-butylacrylate and acrylic or methacrylic acid, and ii. a second polymer which is the addition polymerization product of styrene and maleic anhydride, together with Ii. a particulate wax-like, normally solid, low molecular weight tetrafluoroethylene telomer in an amount from about 15 to 75 weight percent of said overcoating.
Claim 2
Dependent Claim
118 words
An improved electrostatographic photoreceptor which comprises: a. a conductive substrate; b. a layer of an alloy of selenium and arsenic as photoconductive insulating material in operative contact with the conductive substrate; and c. an overcoating uniformly covering the exposed surface of said photoconductive material, the overcoating comprising: I. an organic material comprising a crosslinkable polymeric composition of: i. a first polymer which is the addition polymerization product of methyl methacrylate, n-butylacrylate and acrylic or methacrylic acid, and ii. a second polymer which is the addition polymerization product of styrene and maleic anhydride, together with Ii. a particulate wax-like, normally solid, low molecular weight tetrafluoroethylene telomer in an amount from about 15 to 75 weight percent of said overcoating.
Claim 3
Dependent Claim
19 words
The photoreceptor of claim 1 wherein the selenium/arsenic alloy contains from about 0.3 to about 48.7 weight percent arsenic.
Claim 4
Dependent Claim
14 words
The photoreceptor of claim 1 wherein the selenium/arsenic alloy contains about 37 percent arsenic.
Claim 5
Dependent Claim
24 words
The photoreceptor of claim 1 wherein the tetrafluoroethylene telomer is present in an amount of from 25 to 50 weight percent of the overcoating.
Claim 6
Dependent Claim
17 words
The photoreceptor of claim 1 wherein the overcoating has a thickness from about 1 to 3 microns.
Claim 7
Dependent Claim
18 words
The photoreceptor of claim 1 wherein the molecular weight of the tetrafluoroethylene telomer is from 500 to 100,000.
Claim 8
Dependent Claim
14 words
The photoreceptor of claim 6 wherein the molecular weight is from 1,300 to 40,000.
Claim 9
Dependent Claim
14 words
The photoreceptor of claim 7 wherein the molecular weight is from 25,000 to 35,000.
Claim 10
Dependent Claim
32 words
The photoreceptor of claim 1 wherein the tetrafluoroethylene telomer is in the form of particles or particle agglomerates which range in size from 0.1 μ to 10 μ in their longest dimension.
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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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |