US3937631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic members including polyvinylcarbazoles and plasticizers therefore
Assignee: SCM Corp
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Filing: 1973-12-26
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Granted: 1976-02-10
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Expires: 1993-12-26
Abstract
Abstract A multilayer electrophotographic member (such as a plate or flexible web) of the type for producing an electrostatic latent image thereon has a layer of photoconductive material, such as selenium, overlain by a charge image bearing layer comprising an organic polymeric material having the ability to transport electrical charge carriers therethrough, such as polyvinylcarbazole. The charge image bearing layer also has incorporated therein a plasticizer material selected from the group consisting of phenylether, its oligomers and substituted derivatives of the phenylether moiety.
Inventors
- 👤 Wolfgang O. Eisenhut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:30
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0503; G03G5/051; G03G5/0517; G03G5/043; G03G5/0436
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
101 words
In a multilayer electrophotographic member for producing an electrostatic latent charge image thereon: a layer of photoconductive material; a layer of organic polymeric material overlying said photoconductive layer and having the ability to transport electrical charge carriers therethrough, said layer of organic polymeric material having incorporated therein a plasticizer material selected from the group consisting of oligomers of phenylether, and derivatives of phenylether with at least one aryl substituent attached to the aromatic nuclei, the plasticizer being present in a concentration within the range of 1 to 100 parts of plasticizer per hundred parts of the organic polymeric material by weight.
Claim 2
Dependent Claim
101 words
In a multilayer electrophotographic member for producing an electrostatic latent charge image thereon: a layer of photoconductive material; a layer of organic polymeric material overlying said photoconductive layer and having the ability to transport electrical charge carriers therethrough, said layer of organic polymeric material having incorporated therein a plasticizer material selected from the group consisting of oligomers of phenylether, and derivatives of phenylether with at least one aryl substituent attached to the aromatic nuclei, the plasticizer being present in a concentration within the range of 1 to 100 parts of plasticizer per hundred parts of the organic polymeric material by weight.
Claim 3
Dependent Claim
22 words
The electrophotographic member of claim 1, wherein said plasticizer material is a product comprising mixed isomers of a said derivative of phenylether.
Claim 4
Dependent Claim
22 words
The electrophotographic member of claim 1 wherein said plasticizer material is selected from the group consisting of bis (m-phenoxyphenyl)ether, m-bis(m-phenoxyphenoxy)benzene, and m-bis-benzene.
Claim 5
Dependent Claim
20 words
The electrophotographic member of claim 3, wherein said plasticizer material is a product comprising mixed isomers of said last-mentioned ethers.
Claim 6
Dependent Claim
32 words
The member of claim 1 wherein said layer of polymeric material is selected from the group consisting of polyvinylcarbazole, poly-N-vinylcarbazole, polyacenaphthylene, poly-9(4-pentenyl)carbazole, poly-9-(5-hexyl)carbazole, brominated poly-N-vinylcarbazole copolymers of N-vinylcarbazole with acrylates, and poly-9-vinylanthracene.
Claim 7
Dependent Claim
14 words
The electrophotographic member of claim 1 wherein said layer of polymeric material is poly-N-vinylcarbazole.
Claim 8
Dependent Claim
27 words
The electrophotographic member of claim 6 wherein said polymeric material is a mixture including at least one other member of said last mentioned group of polymeric material.
Claim 9
Dependent Claim
17 words
The member of claim 1 wherein said layer of polymeric material contains a minority concentration of anthracene.
Claim 10
Dependent Claim
15 words
The member of claim 1, wherein said polymeric material has a polymeric extender incorporated therein.
Claim 11
Dependent Claim
20 words
The electrophotographic member of claim 6 wherein said plasticizer is selected from the group consisting of bis(m-phenoxyphenyl)ether, m-bis-(m-phenoxyphenoxy)benzene and m-bis-benzene.
Claim 12
Dependent Claim
29 words
The electrophotographic member of claim 10 wherein the plasticizer is a material purified by passage thereof through an adsorption chromatographic purifier prior to incorporation in said charge bearing layer.
Claim 13
Dependent Claim
17 words
The electrophotographic member of claim 11 wherein the adsorption medium in said chromatographic purifier is aluminum oxide.
Claim 14
Dependent Claim
29 words
The electrophotographic member of claim 1 wherein the plasticizer is a material purified by passage thereof through an adsorption chromatographic purifier prior to incorporation in said charge bearing layer.
Claim 15
Dependent Claim
17 words
The electrophotographic member of claim 13 wherein the adsorption medium in said chromatographic purifier is aluminum oxide.
Claim 16
Dependent Claim
29 words
The electrophotographic member of claim 3 wherein the plasticizer is a material purified by passage thereof through an adsorption chromatographic purifier prior to incorporation in said charge bearing layer.
Claim 17
Dependent Claim
17 words
The electrophotographic member of claim 15 wherein the adsorption medium in said chromatographic purifier is aluminum oxide.
Claim 18
Dependent Claim
19 words
The electrophotographic member of claim 1 wherein said at least one aryl substituent is fused to an aromatic nucleus.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |