US4948690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic photosensitive member with fine spherical resin powder
Assignee: Canon Inc
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Filing: 1990-01-11
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Granted: 1990-08-14
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Expires: 2010-01-11
Abstract
Abstract An electrophotographic photosensitive member comprises an intermediate layer between a support and a photosensitive layer, wherein said intermediate layer contains spherical resin fine powder.
Inventors
- 👤 Masafumi Hisamura
- 👤 Naoto Fujimura
- 👤 Hisami Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:28
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
98 words
An electrophotographic photosensitive member comprising an intermediate layer between a support and a photosensitive layer, wherein said intermediate layer contains spherical resin fine powder, said spherical resin fine powder: (a) having a mean particle size of 0.6 to 6 microns; (b) having a spherical degree of 0.5 or more in terms of ratio of the diameter of the minimum circumscribed circle to the diameter of the maximum inscribed circle when the diameter of the circumscribed circle is 1; (c) being present in amounts from 0.5 to 30 weight percent based on the total weight of the intermediate layer.
Claim 2
Dependent Claim
98 words
An electrophotographic photosensitive member comprising an intermediate layer between a support and a photosensitive layer, wherein said intermediate layer contains spherical resin fine powder, said spherical resin fine powder: (a) having a mean particle size of 0.6 to 6 microns; (b) having a spherical degree of 0.5 or more in terms of ratio of the diameter of the minimum circumscribed circle to the diameter of the maximum inscribed circle when the diameter of the circumscribed circle is 1; (c) being present in amounts from 0.5 to 30 weight percent based on the total weight of the intermediate layer.
Claim 3
Dependent Claim
22 words
An electrophotographic photosensitive member according to claim 1, wherein the spherical degree of the spherical resin fine powder is 0.8 or more.
Claim 4
Dependent Claim
35 words
An electrophotographic photosensitive member according to claim 1, wherein the spherical resin fine powder is selected from the group consisting of acrylic resin, styrene resin, polycarbonate, polyester, polyamide, silicone resin, melamine resin and urea resin.
Claim 5
Dependent Claim
31 words
An electrophotographic photosensitive member according to claim 1, wherein the spherical resin fine powder is selected from the group consisting of silicone resin, melamine resin, polyamide, acrylic resin and styrene resin.
Claim 6
Dependent Claim
17 words
An electrophotographic photosensitive member according to claim 1, wherein the spherical resin fine powder is silicone resin.
Claim 7
Dependent Claim
22 words
An electrophotographic photosensitive member according to claim 1, wherein the intermediate layer containing the spherical resin fine powder is an electroconductive layer.
Claim 8
Dependent Claim
22 words
An electrophotographic photosensitive member according to claim 6, wherein the spherical degree of the spherical resin fine powder is 0.8 or more.
Claim 9
Dependent Claim
35 words
An electrophotographic photosensitive member according to claim 6, wherein the spherical resin fine powder is selected from the group consisting of acrylic resin, styrene resin, polycarbonate, polyester, polyamide, silicone resin, melamine resin and urea resin.
Claim 10
Dependent Claim
31 words
An electrophotographic photosensitive member according to claim 6, wherein the spherical resin fine powder is selected from the group consisting of silicone resin, melamine resin, polyamide, acrylic resin and styrene resin.
Claim 11
Dependent Claim
17 words
An electrophotographic photosensitive member according to claim 6, wherein the spherical resin fine powder is silicone resin.
Claim 12
Dependent Claim
22 words
An electrophotgraphic photosensitive member according to claim 1, wherein the intermediate layer containing the spherical resin fine powder is an adhesive layer.
Claim 13
Dependent Claim
22 words
An electrophotographic photosensitive member according to claim 11, wherein the spherical degree of the spherical resin fine powder is 0.8 or more.
Claim 14
Dependent Claim
35 words
An electrophotographic photosensitive member according to claim 11, wherein the spherical resin fine powder is selected from the group consisting of acrylic resin, styrene resin, polycarbonate, polyester, polyamide, silicone resin, melamine resin and urea resin.
Claim 15
Dependent Claim
31 words
An electrophotographic photosensitive member according to claim 11, wherein the spherical resin fine powder is selected from the group consisting of silicone resin, melamine resin, polyamide, acrylic resin and styrene resin.
Claim 16
Dependent Claim
17 words
An electrophotographic photosensitive member according to claim 11, wherein the spherical resin fine powder is silicone resin.
Claim 17
Dependent Claim
42 words
An electrophotographic photosensitive member according to claim 1, wherein the intermediate layer has a laminated structure of an electroconductive layer and an adhesive layer, and the spherical resin fine powder is contained in either of the electroconductive layer or the adhesive layer.
Claim 18
Dependent Claim
22 words
An electrophotographic photosensitive member according to claim 16, wherein the spherical degree of the spherical resin fine powder is 0.8 or more.
Claim 19
Dependent Claim
35 words
An electrophotographic photosensitive member according to claim 16, wherein the spherical resin fine powder is selected from the group consisting of acrylic resin, styrene resin, polycarbonate, polyester, polyamide, silicone resin, melamine resin and urea resin.
Claim 20
Dependent Claim
31 words
An electrophotographic photosensitive member according to claim 16, wherein the spherical resin fine powder is selected from the group consisting of silicone resin, melamine resin, polyamide, acrylic resin and styrene resin.
Claim 21
Dependent Claim
17 words
An electrophotographic photosensitive member according to claim 16, wherein the spherical resin fine powder is silicone resin.
Claim 22
Dependent Claim
26 words
An electrophotographic photosensitive member according to claim 1, wherein the photosensitive layer has a laminated structure of a charge generation layer and a charge transport layer.
References Cited (Backward Citations)
GB1080308A
Cited
US3656949A
Cited
US4106935A
Cited
US4272569A
Cited
US4308332A
Cited
JPS6052857A
Cited
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| 3.5 Years (Year 4) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
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