Patent US5112708A successfully refreshed from Google Patents.
US5112708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Member for charging with surface layer of n-alkoxymethylated nylon effecting charging at lower voltage
Assignee: Canon Inc
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Filing: 1991-05-02
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Granted: 1992-05-12
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Expires: 2011-05-02
Abstract
Abstract A member for charging comprises a surface layer formed of a N-alkoxymethylated nylon. A contact charging method performs charging of a member to be charged arranged in contact with the member for charging by applying externally a voltage on the member for charging. An electrophotographic device comprises the member for charging and an electrophotographic photosensitive member arranged in contact with the member for charging.
Inventors
- 👤 Masami Okunuki
- 👤 Hisami Tanaka
- 👤 Hiroyuki Ohmori
- 👤 Masafumi Hisamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:02
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/02; G03G15/0208; G03G15/0216; G03G15/0233; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/102
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
38 words
A member for contact charging an electrophotographic photosensitive member when said electrophotographic photosensitive member is in contact with said member for charging, said member for contact charging comprising: an electroconductive substrate and a surface layer of N-alkoxymethylated nylon.
Claim 2
Dependent Claim
38 words
A member for contact charging an electrophotographic photosensitive member when said electrophotographic photosensitive member is in contact with said member for charging, said member for contact charging comprising: an electroconductive substrate and a surface layer of N-alkoxymethylated nylon.
Claim 3
Dependent Claim
21 words
A member for charging according to claim 1, wherein the member for charging has a multi-layer constitution on an electroconductive substrate.
Claim 4
Dependent Claim
20 words
A member for charging according to claim 1, wherein the N-alkoxymethylated nylon has an alkoxymethylation degree of 18% or more.
Claim 5
Dependent Claim
23 words
A member for charging according to claim 1, wherein the surface layer has a volume resistivity of 10 6 to 10 12 ohm.cm.
Claim 6
Dependent Claim
20 words
A member for charging according to claim 1, wherein the surface layer has a thickness of 5 to 200 μm.
Claim 7
Dependent Claim
16 words
A member for charging according to claim 1, wherein the surface layer contains a polyamide resin.
Claim 8
Dependent Claim
15 words
A member for charging according to claim 1, wherein the surface layer contains electroconductive powder.
Claim 9
Dependent Claim
18 words
A member for charging according to claim 7, wherein the electroconductive powder is dispersed in the surface layer.
Claim 10
Dependent Claim
15 words
A member for charging according to claim 7, wherein the electroconductive powder is carbon powder.
Claim 11
Dependent Claim
35 words
A member for charging according to claim 7, wherein 0.1 to 5 parts by weight of electroconductive powder is contained based on 100 parts by weight of the material for formation of the surface layer.
Claim 12
Dependent Claim
17 words
A member for charging according to claim 2, wherein the member for charging is shaped in roller.
Claim 13
Dependent Claim
43 words
A contact charging method, which performs charging of a member to be charged arranged in contact with a member for charging according to any one of claims 1, 2, 6, 7 and 11 by applying externally a voltage on said member for charging.
Claim 14
Dependent Claim
43 words
A contact charging method according to claim 12, wherein the voltage externally applied is a pulse voltage having a direct current voltage of ±200 V to ±2000 V and an alternating current voltage with an interpeak voltage of 4000 V or lower overlapped.
Claim 15
Dependent Claim
33 words
An electrophotographic device, comprising a member for charging according to any one of claims 1, 2, 6, 7 and 11 and an electrophotographic photosensitive member arranged in contact with said member for charging.
Claim 16
Dependent Claim
35 words
An electrophotographic device according to claim 14, wherein said electrophotographic device has an image exposure means, a developing means, a transfer charging means and a cleaning means on the peripheral surface of said photosensitive member.
Claim 17
Dependent Claim
27 words
An electrophotographic device according to claim 14, wherein the electrophotographic photosensitive member is constituted of a photosensitive layer containing an organic photoconductive member on an electroconductive support.
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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) | 1995-05-12 | 1995-11-11 | 1996-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-12 | 1999-11-11 | 2000-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-12 | 2003-11-11 | 2004-05-12 | $7700.00 | Window Closed / Lapsed |