US4500620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic element with copolymer interlayer
Assignee: Fujifilm Holdings Corp
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Filing: 1983-07-14
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Granted: 1985-02-19
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Expires: 2003-07-14
Abstract
Abstract An electrophotographic lithographic printing material comprised of a conductive support, an interlayer, and a photoconductive layer is disclosed. The conductive support is comprised of a conductive paper laminated with carbon-containing polyethylene on both surfaces thereof using, as the interlayer, a polymer having the constructing units shown by following formulae and an acid value of 10 to 100; ##STR1## wherein R 1 represents a hydrogen atom or a methyl group, R 2 represents a hydrogen atom, a methyl group, or an ethyl group; and n is an integer of 1 to 10, ##STR2## wherein R 3 represents a hydrogen atom or a methyl group.
Inventors
- 👤 Chikashi Ohishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:27
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142; G03G5/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
183 words
An electrophotographic light-sensitive material, comprising: a support base having a conductive surface, having formed thereon; an interlayer; and a photoconductive layer formed on the interlayer; said interlayer comprising a polymer having constitutional units represented by the following formulae I and II and having an acid value of 10 to 100 as the main component: ##STR6## wherein R 1 is a hydrogen atom or a methyl group; R 2 is a hydrogen atom, a methyl group, an ethyl group, or a chloromethyl group; and n is an integer of 1 to 10 ##STR7## wherein R 3 is a hydrogen atom or a methyl group, wherein the polymer includes constitutional unit II in an amount in the range of 5 to 60% by weight and the constitutional unit I in an amount in the range of 30 to 80% by weight, wherein the interlayer is present in an amount in the range of 0.1 g/m 2 to 10 g/m 2 and wherein both surfaces of the conductive support are laminated by polyethylene containing 5 to 25% carbon at a thickness of 10 to 45 μm.
Claim 2
Dependent Claim
183 words
An electrophotographic light-sensitive material, comprising: a support base having a conductive surface, having formed thereon; an interlayer; and a photoconductive layer formed on the interlayer; said interlayer comprising a polymer having constitutional units represented by the following formulae I and II and having an acid value of 10 to 100 as the main component: ##STR6## wherein R 1 is a hydrogen atom or a methyl group; R 2 is a hydrogen atom, a methyl group, an ethyl group, or a chloromethyl group; and n is an integer of 1 to 10 ##STR7## wherein R 3 is a hydrogen atom or a methyl group, wherein the polymer includes constitutional unit II in an amount in the range of 5 to 60% by weight and the constitutional unit I in an amount in the range of 30 to 80% by weight, wherein the interlayer is present in an amount in the range of 0.1 g/m 2 to 10 g/m 2 and wherein both surfaces of the conductive support are laminated by polyethylene containing 5 to 25% carbon at a thickness of 10 to 45 μm.
Claim 3
Dependent Claim
20 words
An electrophotographic light-sensitive material as claimed in claim 1, wherein the conductive support is paper containing a conductivity imparting agent.
Claim 4
Dependent Claim
25 words
An electrophotographic light-sensitive material as claimed in claim 1, wherein both surfaces of the conductive support is laminated with polyethylene containing 5 to 25% carbon.
Claim 5
Dependent Claim
37 words
An electrophotographic light-sensitive material as claimed in claim 3, wherein the polyethylene containing 5 to 25% carbon is coated on both surfaces of the conductive support at a thickness in the range of 1.0 to 45 μm.
Claim 6
Dependent Claim
23 words
An electrophotographic light-sensitive material as claimed in claim 1, wherein the polymer has an acid value in the range of 15 to 40.
Claim 7
Dependent Claim
46 words
An electrophotographic light-sensitive material as claimed in claim 1, wherein the polymer includes the constitutional unit II in an amount in the range of 10 to 40% by weight and the constitutional unit I in an amount in the range of 40 to 60% by weight.
Claim 8
Dependent Claim
29 words
An electrophotographic light-sensitive material as claimed in claim 1, wherein the interlayer is present in an amount in the range of 1 g/m 2 to 4 g/m 2 .
References Cited (Backward Citations)
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Cited
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Cited
JPS5414805A
Cited
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Cited
JPS5789760A
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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) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |