US3640710A
Expired / Lapsed
US
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Phthalocyanine photoconductive elements containing multiple binder materials
Assignee: Xerox Corp
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Filing: 1969-12-31
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Granted: 1972-02-08
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Expires: 1989-12-31
Abstract
Abstract Improved electrophotographic elements comprising specific phthalocyanine pigments dispersed in specific binder materials in specific proportions are disclosed. Electrophotographic processes employing said elements are also disclosed.
Inventors
- 👤 Joseph Mammino
- 👤 Robert M Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:12
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0696
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
13 words
The material as defined in claim 1 wherein said phthalocyanine pigment is metal-free.
Claim 2
Dependent Claim
12 words
The material as defined in claim 1 further comprising an antiblocking agent.
Claim 3
Dependent Claim
15 words
The material as defined in claim 3 wherein said antiblocking agent comprises a silica pigment.
Claim 4
Dependent Claim
67 words
The material as defined in claim 1 which comprises about 1 to 2 parts, by weight, of a phthalocyanine pigment said pigment being selected from at least one member of the group consisting of alpha phthalocyanine, beta phthalocyanine, and X-form phthalocyanine; about 2-4 parts by weight of silicone resin; about 6-13 parts, by weight, of chlorinated hydrocarbon; and about 4-12 parts, by weight, of the resin blend.
Claim 5
Dependent Claim
46 words
The material as defined in claim 1 which comprises about 1 part, by weight, of said phthalocyanine pigment; about 2.5 parts, by weight, of said silicone resin; about 7 parts, by weight, of said chlorinated hydrocarbon; and about 7 parts, by weight, of said resin blend.
Claim 6
Dependent Claim
90 words
An electrophotographic plate which comprises a photoconductive layer positioned on a substrate material, said photoconductive layer comprising a phthalocyanine pigment said pigment being selected from at least one member of the group consisting of alpha phthalocyanine, beta phthalocyanine, and X-form phthalocyanine; and a binder for said pigment comprising from about 6 to about 13 parts, by weight, of an alkyd-acrylate resin blend, from about 2 to about 4 parts, by weight, of a silicone resin, and from about 6 to about 13 parts, by weight, of a film-forming chlorinated hydrocarbon.
Claim 7
Dependent Claim
13 words
The plate as defined in claim 7 wherein said substrate material comprises paper.
Claim 8
Dependent Claim
15 words
The plate as defined in claim 7 wherein said substrate material comprises a film base.
Claim 9
Dependent Claim
15 words
The plate as defined in claim 7 wherein said substrate material comprises conductive treated paper.
Claim 10
Dependent Claim
15 words
The plate as defined in claim 7 wherein said substrate material comprises a plastic material.
Claim 11
Dependent Claim
13 words
The plate as defined in claim 7 wherein said photoconductive layer is overcoated.
Claim 12
Dependent Claim
79 words
A self-supporting photoconductive layer which comprises a phthalocyanine pigment said pigment being selected from at least one member of the group consisting of alpha phthalocyanine, beta phthalocyanine, and X-form phthalocyanine; and a binder for said pigment comprising from about 6 to about 13 parts, by weight, of an alkyd-acrylate resin blend, from about 2 to about 4 parts, by weight, of a silicone resin, and from about 6 to about 13 parts, by weight, of a film-forming chlorinated hydrocarbon.
Claim 13
Dependent Claim
90 words
A process for forming a latent image which comprises charging a photoconductive layer which comprises a phthalocyanine pigment selected from at least one member of the group consisting of alpha-phthalocyanine, beta-phthalocyanine, X-form phthalocyanine; and a binder for said pigment comprising from about 6 to about 13 parts, by weight, of an alkyd-acrylate resin blend, from about 2 to about 4 parts, by weight, of a silicone resin and from about 6 to about 13 parts, by weight, of a film forming chlorinated hydrocarbon, and exposing said layer in imagewise configuration.
Claim 14
Dependent Claim
17 words
The process as defined in claim 14 wherein said photoconductive layer is overcoated with an insulating composition.
Claim 15
Dependent Claim
30 words
A process for forming a latent electrostatic charge pattern which comprises electrostatically charging the electrophotographic material of claim 1 and exposing said material to a pattern of activating electromagnetic radiation.
Claim 16
Dependent Claim
39 words
A process for forming a latent electrostatic charge pattern on the electrophotographic plate as defined in claim 5 which comprises electrostatically charging the photoconductive layer of said plate and exposing said layer to a pattern of activating electromagnetic radiation.
Claim 17
Dependent Claim
29 words
An electrophotographic process which comprises electrically charging the eleCtrophotographic plate as defined in claim 5, exposing said plate to an image pattern to be reproduced, and developing said image.
Claim 18
Dependent Claim
40 words
An electrophotographic process which comprises passing the electrophotographic plate as defined in claim 7 at least twice through a cycle comprising charging and exposing said plate to a pattern of activating electromagnetic radiation and developing with electrostatically attractable colored material.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |