US4559260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image holding member having protective layers
Assignee: Canon Inc
•
Filing: 1982-11-30
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Granted: 1985-12-17
•
Expires: 2002-11-30
Abstract
Abstract An image holding member for electrostatic images or toner images has a three-layered insulating layer at the surface. The insulating layer is composed of an upper layer mainly composed of an organic solvent soluble thermoplastic resin, an intermediate layer mainly composed of an organic solvent soluble thermoplastic resin and a cured thermosetting resin, and a lower layer mainly composed of a cured thermosetting resin.
Inventors
- 👤 Masaaki Hirooka
- 👤 Hitoshi Toma
- 👤 Hideyo Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:07
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/147; G03G5/02; G03G5/0202; G03G5/0205; Y; Y10; Y10S; Y10S430/00; Y10S430/162; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
114 words
An image holding member for holding electrostatic images or toner images which comprises at least a support and, at the surface, a three-layered insulating layer comprising an upper layer mainly composed of an organic solvent-soluble thermoplastic resin having a linear molecular structure, an intermediate layer having a thickness of from 1 to 35 microns and being mainly composed of an organic solvent-soluble thermoplastic resin and a cured thermosetting resin, wherein the ratio by weight of said thermoplastic resin to said thermosetting resin is from 8:2 to 2:8 and wherein said thermoplastic resin and said cured thermosetting resin are mutually soluble in each other, and a lower layer mainly composed of a cured thermosetting resin.
Claim 2
Dependent Claim
114 words
An image holding member for holding electrostatic images or toner images which comprises at least a support and, at the surface, a three-layered insulating layer comprising an upper layer mainly composed of an organic solvent-soluble thermoplastic resin having a linear molecular structure, an intermediate layer having a thickness of from 1 to 35 microns and being mainly composed of an organic solvent-soluble thermoplastic resin and a cured thermosetting resin, wherein the ratio by weight of said thermoplastic resin to said thermosetting resin is from 8:2 to 2:8 and wherein said thermoplastic resin and said cured thermosetting resin are mutually soluble in each other, and a lower layer mainly composed of a cured thermosetting resin.
Claim 3
Dependent Claim
22 words
An image holding member according to claim 1 in which the thickness of the upper layer ranges from 2 to 40 microns.
Claim 4
Dependent Claim
22 words
An image holding member according to claim 1 in which the thickness of the lower layer ranges from 2 to 20 microns.
Claim 5
Dependent Claim
24 words
An image holding member according to claim 1 further comprising a photoconductive layer on said support and on which said insulating layer is formed.
Claim 6
Dependent Claim
49 words
An image holding member according to claim 1 in which the thermoplastic resins for forming the upper layer and the intermediate layer are selected from the group consisting of polyesters, phenoxy resins, polystyrene, polyvinyl chloride, cellulose, polyvinyl acetate, vinyl chloride-vinyl acetate copolymer, polyacrylic acid esters, polyolefins, and thermoplastic urethane.
Claim 7
Dependent Claim
42 words
An image holding member according to claim 1 in which the thermosetting resins for forming the intermediate layer and the lower layer are selected from the group consisting of acrylic resins, urethane resins, polyester resins, epoxy resins, melamine resins and silicone resins.
Claim 8
Dependent Claim
17 words
An image holding member according to claim 1 in which the upper layer contains a lubricating powder.
References Cited (Backward Citations)
US2901349A
Cited
US3904406A
Cited
US4123278A
Cited
US4012255A
Cited
US4032684A
Cited
JPS5377632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |