US5009974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface-treated metal body, process for producing the same, photoconductive member using the same and rigid ball for treating metal body surface
Assignee: Canon Inc
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Filing: 1990-04-27
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Granted: 1991-04-23
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Expires: 2010-04-27
Abstract
Abstract A surface-treated metal body comprises a metal body having a plurality of spherical indent recesses as irregularities formed on the surface, and further having fine irregularities formed in the spherical indent recesses.
Inventors
- 👤 Mitsuru Honda
- 👤 Atsushi Koike
- 👤 Tomohiro Kimura
- 👤 Kyosuke Ogawa
- 👤 Keiichi Murai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:47
CPC Classifications
B; B24; B24C; B24C11/00; B24C1/00; B24C1/06; G; G03; G03G; G03G5/00; G03G5/10; G03G5/102; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
An electrophotographic process comprising: (a) charging a photoconductive member comprising a photoconductive layer on a support, the support being a surface-treated metal body having irregularities formed through a plurality of spherical indent recesses on the surface and having fine irregularities formed in the spherical indent recesses, wherein the ratio of the radius of curvature R and the width r of the spherical indent recesses are in a range of 0.035≦r/R≦0.5 and wherein the radius of curvature R of the spherical indent recesses is in a range of 0.1 mm≦R≦2.0 mm; and (b) imagewise exposing said photoconductive member with an information-bearing laser beam to thereby form an electrostatic image.
Claim 2
Dependent Claim
108 words
An electrophotographic process comprising: (a) charging a photoconductive member comprising a photoconductive layer on a support, the support being a surface-treated metal body having irregularities formed through a plurality of spherical indent recesses on the surface and having fine irregularities formed in the spherical indent recesses, wherein the ratio of the radius of curvature R and the width r of the spherical indent recesses are in a range of 0.035≦r/R≦0.5 and wherein the radius of curvature R of the spherical indent recesses is in a range of 0.1 mm≦R≦2.0 mm; and (b) imagewise exposing said photoconductive member with an information-bearing laser beam to thereby form an electrostatic image.
Claim 3
Dependent Claim
16 words
The process according to claim 1 further comprising developing said electrostatic image after the imagewise exposing.
Claim 4
Dependent Claim
16 words
The process according to claim 2 further comprising transferring the developed image formed after the developing.
Claim 5
Dependent Claim
18 words
The process according to claim 3 further comprising cleaning said photoconductive member with a blade after the transferring.
Claim 6
Dependent Claim
30 words
The process according to claim 1 further comprising employing said support wherein the irregularities are formed through the spherical indent recesses of substantially the same radius of curvature and width.
Claim 7
Dependent Claim
28 words
The process according to claim 1 further comprising employing said support wherein the width r of the spherical indent recesses is in a range of 0.02 mm≦r≦0.5 mm.
Claim 8
Dependent Claim
33 words
The process according to claim 1 further comprising employing said support wherein the levels of the fine irregularities in the spherical indent recesses is in a range of 0.5 μm to 20 μm.
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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) | 1994-04-22 | 1994-10-22 | 1995-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-22 | 1998-10-22 | 1999-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-22 | 2002-10-22 | 2003-04-23 | $7700.00 | Window Closed / Lapsed |