US3963486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic imaging process employing epoxy-ester containing liquid developer
Assignee: Xerox Ltd
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Filing: 1975-03-26
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Granted: 1976-06-15
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Expires: 1995-03-26
Abstract
Abstract A liquid electrophotographic developer and processes for employing same are disclosed. The developer is composed of a liquid carrier, pigment, and a resin which results in a developed image that is abrasion resistant. The developer contains from 5 to 70% of the resin component which comprises an epoxy-ester.
Inventors
- 👤 Yasuo Tamai
- 👤 Hajime Miyatuka
- 👤 Satoru Honjo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:03
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/13; G03G9/132
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
87 words
An electrophotographic imaging process comprising charging a photoconductive member, selectively exposing said member to imagewise radiation to which it is sensitive, and developing said member with a liquid developer, said developer consisting essentially of an insulating liquid carrier, a pigment, and a resin mixture, said resin comprising epoxy-ester in a range of from 5 to 70% by weight of the resin and the remainder of the resin mixture is selected from the group consisting of alkyd, resin-modified alkyd, phenol-modified alkyd, styrene-modified alkyd, rosin-modified formaldehyde and polyamide resins.
Claim 2
Dependent Claim
87 words
An electrophotographic imaging process comprising charging a photoconductive member, selectively exposing said member to imagewise radiation to which it is sensitive, and developing said member with a liquid developer, said developer consisting essentially of an insulating liquid carrier, a pigment, and a resin mixture, said resin comprising epoxy-ester in a range of from 5 to 70% by weight of the resin and the remainder of the resin mixture is selected from the group consisting of alkyd, resin-modified alkyd, phenol-modified alkyd, styrene-modified alkyd, rosin-modified formaldehyde and polyamide resins.
Claim 3
Dependent Claim
22 words
The process as defined in claim 1 wherein during said developing step roller electrodes are pressed into contact with said photoconductive surface.
Claim 4
Dependent Claim
30 words
The process as defined in claim 1 further comprising removing the excess amount of said liquid developer after said development step by pressing rollers into contact with said photoconductive surface.
Claim 5
Dependent Claim
35 words
The process as defined in claim 1 wherein said epoxy-ester contains an acid component selected from the group consisting of vegetable fatty acid, styrene-modified vegetable fatty acid, tall oil, rosin, hydrogenated rosin and dimerized rosin.
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) | 1979-06-15 | 1979-12-15 | 1980-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-15 | 1983-12-15 | 1984-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-15 | 1987-12-15 | 1988-06-15 | $7700.00 | Window Closed / Lapsed |