US5363176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact charging member and apparatus using the charging member
Assignee: Canon Inc
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Filing: 1994-01-26
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Granted: 1994-11-08
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Expires: 2014-01-26
Abstract
Abstract A charger having a surface layer, the content of components of the surface layer having a molecular weight of 1,000 or less in a resin is 0.5 wt % or less, charges a member to be charged by contacting the member to be charged in an electrophotographic apparatus or the like.
Inventors
- 👤 Yuzi Ishihara
- 👤 Hisayo Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:48
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/14; G03G15/16; G03G15/1665; G03G15/167; G03G15/1685; G03G15/02; G03G15/0208; G03G15/0216; G03G15/0233
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
50 words
A charging member for charging a charged member by being brought into contact with the charged member, said charging member comprising a surface layer, wherein the content of components having a molecular weight of 1,000 or less in a resin forming said surface layer is 0.5 wt % or less.
Claim 2
Dependent Claim
50 words
A charging member for charging a charged member by being brought into contact with the charged member, said charging member comprising a surface layer, wherein the content of components having a molecular weight of 1,000 or less in a resin forming said surface layer is 0.5 wt % or less.
Claim 3
Dependent Claim
43 words
A charging member according to claim 1, wherein the resin forming the surface layer of said charging member is formed of at least one resin selected from the group consisting of polyurethane resins, acrylic resins, polyester resins, fluorine resins and a polyamide resins.
Claim 4
Dependent Claim
17 words
A charging member according to claim 1, wherein said charging member has the shape of a roller.
Claim 5
Dependent Claim
18 words
A charging member according to claim 1, wherein said charging member has the shape of a flat plate.
Claim 6
Dependent Claim
31 words
A charging member according to claim 1, wherein the content of components having a molecular weight of 1,000 or less in a resin forming said surface layer is 0.44% or less.
Claim 7
Dependent Claim
31 words
A charging member according to claim 1, wherein the content of components having a molecular weight of 1,000 or less in a resin forming said surface layer is 0.27% or less.
Claim 8
Dependent Claim
27 words
A charging member according to claim 1, 5 or 6, wherein the percentage of the content of components is a value before the charging member is used.
Claim 9
Dependent Claim
72 words
An unit capable of being detachably attached to a body of an apparatus, said unit comprising: a charging member having a surface layer; a photosensitive member; and at least one of development means and cleaning means supported integrally with said charging member and said photosensitive member; wherein the content of components having a molecular weight of 1,000 or less in a resin forming said surface layer is 0.5 wt % or less.
Claim 10
Dependent Claim
72 words
An unit capable of being detachably attached to a body of an apparatus, said unit comprising: a charging member having a surface layer; a photosensitive member; and at least one of development means and cleaning means supported integrally with said charging member and said photosensitive member; wherein the content of components having a molecular weight of 1,000 or less in a resin forming said surface layer is 0.5 wt % or less.
Claim 11
Dependent Claim
30 words
A unit according to claim 8, wherein the content of components having a molecular weight of 1,000 or less in a resin forming said surface layer is 0.44% or less.
Claim 12
Dependent Claim
30 words
A unit according to claim 8, wherein the content of components having a molecular weight of 1,000 or less in a resin forming said surface layer is 0.27% or less.
Claim 13
Dependent Claim
26 words
A unit according to claims 8, 9 or 10, wherein the percentage of the content of components is a value before the charging member is used.
Claim 14
Dependent Claim
92 words
An electrophotographic apparatus comprising: a photosensitive member; latent image forming means; means for developing a formed latent image; means for transferring the developed image to a transfer member; and at least one of a first charging member for supplying charge to said latent image forming means, and a second charging member for effecting transfer charging; wherein the content of components having a molecular weight of 1,000 or less in a resin forming a surface layer on at least one of said first and second charging members is 0.5 wt % or less.
Claim 15
Dependent Claim
92 words
An electrophotographic apparatus comprising: a photosensitive member; latent image forming means; means for developing a formed latent image; means for transferring the developed image to a transfer member; and at least one of a first charging member for supplying charge to said latent image forming means, and a second charging member for effecting transfer charging; wherein the content of components having a molecular weight of 1,000 or less in a resin forming a surface layer on at least one of said first and second charging members is 0.5 wt % or less.
Claim 16
Dependent Claim
30 words
An apparatus according to claim 12, wherein the content of components having a molecular weight of 1,000 or less in a resin forming said surface layer is 0.44% or less.
Claim 17
Dependent Claim
30 words
An apparatus according to claim 12, wherein the content of components having a molecular weight of 1,000 or less in a resin forming said surface layer is 0.27% or less.
Claim 18
Dependent Claim
27 words
An apparatus according to claim 12, 13 or 14, wherein the percentage of the content of the components is a value before the charging member is used.
Claim 19
Dependent Claim
54 words
A charging member for charging a charged member by being brought into contact with the charged member, said charging member comprising a surface layer, wherein the content of components having a molecular weight of 1,000 or less in the resin forming the surface layer of said charging member is 0.3 wt % or less.
Claim 20
Dependent Claim
54 words
A charging member for charging a charged member by being brought into contact with the charged member, said charging member comprising a surface layer, wherein the content of components having a molecular weight of 1,000 or less in the resin forming the surface layer of said charging member is 0.3 wt % or less.
Claim 21
Dependent Claim
76 words
An unit capable of being detachably attached to a body of an apparatus, said unit comprising: a charging member having a surface layer; a photosensitive member; and at least one of development means and cleaning means supported integrally with said charging member and said photosensitive member; wherein the content of components having a molecular weight of 1,000 or less in the resin forming the surface layer of said charging member is 0.3 wt % or less.
Claim 22
Dependent Claim
76 words
An unit capable of being detachably attached to a body of an apparatus, said unit comprising: a charging member having a surface layer; a photosensitive member; and at least one of development means and cleaning means supported integrally with said charging member and said photosensitive member; wherein the content of components having a molecular weight of 1,000 or less in the resin forming the surface layer of said charging member is 0.3 wt % or less.
Claim 23
Dependent Claim
81 words
An electrophotographic apparatus comprising: a photosensitive member; latent image forming means; means for developing a formed latent image; means for transferring the developed image to a transfer member; and at least one of a first charging member for supplying charge to said latent image forming means, and a second charging member for effecting transfer charging; wherein the content of components having a molecular weight of 1,000 or less in a resin forming said surface layer is 0.3 wt % or less.
Claim 24
Dependent Claim
81 words
An electrophotographic apparatus comprising: a photosensitive member; latent image forming means; means for developing a formed latent image; means for transferring the developed image to a transfer member; and at least one of a first charging member for supplying charge to said latent image forming means, and a second charging member for effecting transfer charging; wherein the content of components having a molecular weight of 1,000 or less in a resin forming said surface layer is 0.3 wt % or less.
References Cited (Backward Citations)
US5017965A
Cited
US5140371A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-11-07 | 1998-05-09 | 1998-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-07 | 2002-05-09 | 2002-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-07 | 2006-05-09 | 2006-11-08 | $7700.00 | Window Closed / Lapsed |