US5322755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imaging members with mixed binders
Assignee: Xerox Corp
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Filing: 1993-01-25
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Granted: 1994-06-21
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Expires: 2013-01-25
Abstract
Abstract A layered photoconductive imaging member comprised of a supporting substrate, a photogenerator layer comprised of perylene photoconductive pigments dispersed in a resin binder mixture comprised of at least two polymers, and a charge transport layer.
Inventors
- 👤 Charles G. Allen
- 👤 Ah-Mee Hor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:05
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0528; G03G5/0532; G03G5/055; G03G5/0557; G03G5/0564; G03G5/06; G03G5/0601; G03G5/0605; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0631; G03G5/07; G03G5/071; G03G5/072; G03G5/073
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
47 words
A layered photoconductive imaging member consisting essentially of a supporting substrate, a photogenerator layer of perylene photoconductive pigments dispersed in a resin binder mixture comprised of two polymers, and a charge transport layer wherein one polymer is a polyvinylcarbazole and the second polymer is a polycarbonate homopolymer.
Claim 2
Dependent Claim
47 words
A layered photoconductive imaging member consisting essentially of a supporting substrate, a photogenerator layer of perylene photoconductive pigments dispersed in a resin binder mixture comprised of two polymers, and a charge transport layer wherein one polymer is a polyvinylcarbazole and the second polymer is a polycarbonate homopolymer.
Claim 3
Dependent Claim
36 words
A layered photoconductive imaging member comprised of a supporting substrate, a photogenerator layer comprised of benzimidazole perylene photoconductive pigments dispersed in a resin binder mixture of polyvinylcarbazole and polycarbonate homopolymer, and thereover a charge transport layer.
Claim 4
Dependent Claim
36 words
A layered photoconductive imaging member comprised of a supporting substrate, a photogenerator layer comprised of benzimidazole perylene photoconductive pigments dispersed in a resin binder mixture of polyvinylcarbazole and polycarbonate homopolymer, and thereover a charge transport layer.
Claim 5
Dependent Claim
31 words
An imaging member in accordance with claim 2 wherein the resin binder mixture is comprised of from 5 to 95 percent of polyvinylcarbazole and from 95 to 5 percent of polycarbonate.
Claim 6
Dependent Claim
18 words
An imaging member in accordance with claim 2 wherein the binder mixture is comprised of polyvinylcarbazole and polyvinylbutyral.
Claim 7
Dependent Claim
31 words
An imaging member in accordance with claim 4 wherein the resin binder mixture is comprised of from 5 to 95 percent of polyvinylcarbazole and from 95 to 5 percent of polyvinylbutyral.
Claim 8
Dependent Claim
19 words
An imaging member in accordance with claim 2 wherein the binder mixture is comprised of polyvinylcarbazole and a polyester.
Claim 9
Dependent Claim
32 words
An imaging member in accordance with claim 6 wherein the resin binder mixture is comprised of from 5 to 95 percent of polyvinylcarbazole and from 95 to 5 percent of a polyester.
Claim 10
Dependent Claim
23 words
An imaging member in accordance with claim 2 wherein the weight ration of benzimidazole perylene to binder mixture varies from 30:70 to 90:10.
Claim 11
Dependent Claim
23 words
An imaging member in accordance with claim 1 wherein the charge transport layer is comprised of aryl diamines dispersed in a resin binder.
Claim 12
Dependent Claim
23 words
An imaging member in accordance with claim 2 wherein the charge transport layer is comprised of aryl diamines dispersed in a resin binder.
Claim 13
Dependent Claim
29 words
An imaging member in accordance with claim 1 wherein the pigments are N,N'-substituted-3,4,9,10-perylene-bis(dicarboximide) compounds where the substituted groups are alkyl, aryl, arylalkyl, halogenated alkyl, halogenated aryl, or halogenated arylalkyl.
Claim 14
Dependent Claim
27 words
A layered photoconductive imaging member consisting essentially of a photoconductive layer comprised of perylene photoconductive pigments dispersed in a resin binder mixture of polyvinylcarbazole and polycarbonate homopolymer.
Claim 15
Dependent Claim
27 words
A layered photoconductive imaging member consisting essentially of a photoconductive layer comprised of perylene photoconductive pigments dispersed in a resin binder mixture of polyvinylcarbazole and polycarbonate homopolymer.
Claim 16
Dependent Claim
15 words
An imaging member in accordance with claim 12 wherein the polycarbonate is poly(oxycarbonyloxy-1,4-phenyleneisopropylidene-1,4-phenylene) or poly(oxcarbonyloxy-1,4-phenylenecyclohexyldene-1,4-phenylene).
Claim 17
Dependent Claim
35 words
An imaging member in accordance with claim 12 wherein the resin binder mixture is comprised of from about 5 to about 95 percent of polyvinylcarbazole and from about 95 to about 5 percent of polycarbonate.
Claim 18
Dependent Claim
33 words
An imaging member in accordance with claim 12 wherein the binder mixture is comprised of polyvinylcarbazole, polyvinylbutyral and polycarbonate homopolymer wherein the weight percent of polyvinylcarbazole is from about 5 to about 30.
Claim 19
Dependent Claim
36 words
An imaging member in accordance with claim 3 wherein the molecular weight of the polyvinylcarbazole is from about 200,000 to about 1,000,000, and the molecular weight of the polycarbonate is from about 15,000 to about 500,000.
Claim 20
Dependent Claim
23 words
An imaging member in accordance with claim 4 wherein the molecular weight of the polyvinyl butyral is from about 200,000 to about 300,000.
Claim 21
Dependent Claim
22 words
An imaging member in accordance with claim 6 wherein the molecular weight of the polyester is from about 15,000 to about 80,000.
Claim 22
Dependent Claim
19 words
An imaging member in accordance with claim 11 wherein the binder mixture is comprised of polyvinylcarbazole and polycarbonate homopolymer.
Claim 23
Dependent Claim
29 words
A process for improving the electrical characteristics of imaging members which comprises adding to the photogenerator layer of such members a binder mixture of polyvinylcarbazole and a polycarbonate homopolymer.
Claim 24
Dependent Claim
29 words
A process for improving the electrical characteristics of imaging members which comprises adding to the photogenerator layer of such members a binder mixture of polyvinylcarbazole and a polycarbonate homopolymer.
Claim 25
Dependent Claim
23 words
A process in accordance with claim 20 wherein the polycarbonate is poly(oxycarbonyloxy-1,4-phenyleneisopropylidene-1,4-phenylene) or poly(oxcarbonyloxy-1,4-phenylenecyclohexyldene-1,4-phenylene), and the photosensitivity of the imaging member is increased.
Claim 26
Dependent Claim
14 words
A member in accordance with claim 1 wherein the polycarbonate is poly(oxycarbonyloxy-1,4-phenyleneisopropylidene-1,4-phenylene) or poly(oxcarbonyloxy-1,4-phenylenecyclohexyldene-1,4-phenylene).
Claim 27
Dependent Claim
45 words
A layered photoconductive imaging member comprised of a supporting substrate, a photogenerating layer comprised of perylene photoconductive pigment, and top charge transport layer wherein the improvement resides in selecting for the perylene photoconducting pigments, a resin binder mixture of a polyvinylcarbazole and a polycarbonate homopolymer.
Claim 28
Dependent Claim
45 words
A layered photoconductive imaging member comprised of a supporting substrate, a photogenerating layer comprised of perylene photoconductive pigment, and top charge transport layer wherein the improvement resides in selecting for the perylene photoconducting pigments, a resin binder mixture of a polyvinylcarbazole and a polycarbonate homopolymer.
Claim 29
Dependent Claim
15 words
An imaging member in accordance with claim 23 wherein the polycarbonate is poly(oxycarbonyloxy-1,4-phenyleneisopropylidene-1,4-phenylene) or poly(oxcarbonyloxy-1,4-phenylenecyclohexyldene-1,4-phenylene).
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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) | 1997-06-20 | 1997-12-20 | 1998-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-20 | 2001-12-20 | 2002-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-20 | 2005-12-20 | 2006-06-21 | $7700.00 | Window Closed / Lapsed |