US5223361A
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US
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Multilayer electrophotographic imaging member comprising a charge generation layer with a copolyester adhesive dopant
Assignee: Xerox Corp
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Filing: 1990-08-30
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Granted: 1993-06-29
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Expires: 2010-08-30
Abstract
Abstract An electrophotographic imaging member provided with a supporting substrate, a conductive layer, a charge blocking layer, an optional adhesive layer, a charge generating layer and a charge transport layer, wherein the charge generating layer contains a photogenerating pigment and a copolyester adhesive dopant blended into a film-forming polymer binder. The doping of the charge generating layer with a copolyester adhesive permits the elimination of the need of the optional adhesive layer for effective cost saving measure. If the adhesive layer is provided, the adhesion strength between the charge generating layer and the adhesive layer is significantly enhanced by up to about four times.
Inventors
- 👤 Satchidanand Mishra
- 👤 Robert C. U. Yu
- 👤 Leon A. Teuscher
- 👤 Andrea G. Holland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:07
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0528; G03G5/0557; G03G5/056; G03G5/14; G03G5/142
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
28 words
An electrophotographic imaging member, comprising a charge generating layer comprised of a film-forming binder, a photogenerating pigment, and a copolyester adhesive dopant which is different from said binder.
Claim 2
Dependent Claim
28 words
An electrophotographic imaging member, comprising a charge generating layer comprised of a film-forming binder, a photogenerating pigment, and a copolyester adhesive dopant which is different from said binder.
Claim 3
Dependent Claim
21 words
The imaging member of claim 1, wherein said binder is selected from the group consisting of polyvinylcarbazole, polyvinylbutyral, polystyrene and polystyrenebutadiene.
Claim 4
Dependent Claim
15 words
The imaging member of claim 1, wherein said photogenerating pigment is selenium or selenium alloy.
Claim 5
Dependent Claim
26 words
The imaging member of claim 1, wherein said copolyester adhesive dopant is present in an amount of about 0.1 volume percent to about 20 volume percent.
Claim 6
Dependent Claim
21 words
The imaging member of claim 1, further comprising an adhesive layer between a charge blocking layer and said charge generating layer.
Claim 7
Dependent Claim
14 words
The imaging member of claim 5, wherein said charge blocking layer comprises a silane.
Claim 8
Dependent Claim
30 words
The imaging member of claim 5, wherein said adhesive layer comprises a material which is different from, but chemically similar to, said copolyester adhesive dopant in said charge generating layer.
Claim 9
Dependent Claim
21 words
The imaging member of claim 5, wherein said adhesive layer has a thickness of about 0.01 micrometer to about 0.3 micrometer.
Claim 10
Dependent Claim
13 words
The imaging member of claim 5, wherein said adhesive layer comprises a copolyester.
Claim 11
Dependent Claim
35 words
The electrophotographic imaging member of claim 1, wherein said copolyester adhesive dopant is a linear saturated copolyester having a molecular structure represented as ##STR7## where n is a number which represents the degree of polymerization.
Claim 12
Dependent Claim
59 words
An electrophotographic imaging member, comprising a supporting substrate, a conductive layer, a charge blocking layer, a charge generating layer, and a charge transport layer, said imaging member not containing an adhesive layer between said charge generating layer and said blocking layer, wherein said charge generating layer comprises a film forming binder, a photogenerating pigment and a copolyester adhesive dopant.
Claim 13
Dependent Claim
59 words
An electrophotographic imaging member, comprising a supporting substrate, a conductive layer, a charge blocking layer, a charge generating layer, and a charge transport layer, said imaging member not containing an adhesive layer between said charge generating layer and said blocking layer, wherein said charge generating layer comprises a film forming binder, a photogenerating pigment and a copolyester adhesive dopant.
Claim 14
Dependent Claim
11 words
The imaging member of claim 11, wherein said binder is polyvinylcarbazole.
Claim 15
Dependent Claim
15 words
The imaging member of claim 11, wherein said photogenerating pigment is selenium or selenium alloy.
Claim 16
Dependent Claim
26 words
The imaging member of claim 11, wherein said copolyester adhesive dopant is present in an amount of about 0.1 volume percent to about 20 volume percent.
Claim 17
Dependent Claim
14 words
The imaging member of claim 11, wherein said charge blocking layer comprises a silane.
Claim 18
Dependent Claim
35 words
The electrophotographic imaging member of claim 11, wherein said copolyester adhesive dopant is a linear saturated copolyester having a molecular structure represented as ##STR8## where n is a number which represents the degree of polymerization.
Claim 19
Dependent Claim
43 words
An electrophotographic imaging member, comprising a supporting substrate, a conductive layer, a charge blocking layer, an adhesive layer, a charge generating layer, and a charge transport layer, wherein said charge generating layer comprises a film-forming binder, photogenerating pigment and a copolyester adhesive dopant.
Claim 20
Dependent Claim
43 words
An electrophotographic imaging member, comprising a supporting substrate, a conductive layer, a charge blocking layer, an adhesive layer, a charge generating layer, and a charge transport layer, wherein said charge generating layer comprises a film-forming binder, photogenerating pigment and a copolyester adhesive dopant.
Claim 21
Dependent Claim
11 words
The imaging member of claim 17, wherein said binder is polyvinylcarbazole.
Claim 22
Dependent Claim
15 words
The imaging member of claim 17, wherein said photogenerating pigment is selenium or selenium alloy.
Claim 23
Dependent Claim
45 words
The imaging member of claim 17, wherein said copolyester adhesive dopant is a linear saturated copolyester of four diacids and ethylene glycol, having a molecular weight of about 70,000, and being present in an amount of about 0.1 volume percent to about 20 volume percent.
Claim 24
Dependent Claim
44 words
The imaging member of claim 17, wherein said copolyester adhesive dopant is a linear copolyester of two diacids and ethylene glycol, having a molecular weight of about 50,000, and being present in an amount of about 0.1 volume percent to about 20 volume percent.
Claim 25
Dependent Claim
14 words
The imaging member of claim 17, wherein said charge blocking layer comprises a silane.
Claim 26
Dependent Claim
14 words
The imaging member of claim 17, wherein said adhesive layer comprises a copolyester adhesive.
Claim 27
Dependent Claim
30 words
The imaging member of claim 23, wherein said copolyester of said adhesive layer and said copolyester adhesive dopant in said charge generating layer are different materials, but are chemically similar.
Claim 28
Dependent Claim
35 words
The electrophotographic imaging member of claim 17, wherein said copolyester adhesive dopant is a linear saturated copolyester having a molecular structure represented as ##STR9## where n is a number which represents the degree of polymerization.
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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) | 1996-06-28 | 1996-12-28 | 1997-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-28 | 2000-12-28 | 2001-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-28 | 2004-12-28 | 2005-06-29 | $7700.00 | Window Closed / Lapsed |