Electrophotographic photosensitive member with depressed portions, process cartridge holding the electrophotographic photosensitive member and electrophotographic apparatus with the electrophotographic photosensitive member
First Claim
1. An electrophotographic photosensitive member, comprising a support and a photosensitive layer provided on the support, wherein a plurality of depressed portions independent of each other are formed on the surface of the electrophotographic photosensitive member, the number of the depressed portions per 100 μ
- m square is 76 or more and 1,000 or less, openings of the depressed portions have an average major axis diameter of 3.9 μ
m or more and 12.0 μ
m or less, and the depressed portions are formed at the entire region of the surface.
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Accused Products
Abstract
An electrophotographic photosensitive member is disclosed which is excellent in cleaning performance, has improved durability, and suppresses image defects in various environments. The electrophotographic photosensitive member has a support and a photosensitive layer provided on the support. Depressed portions independent of one another are formed on the surface of the electrophotographic photosensitive member so that the number of the depressed portions per 100 μm square is 76 or more and 1,000 or less. The openings of the depressed portions have an average major axis diameter of more than 3.0 μm and 14.0 μm or less.
47 Citations
8 Claims
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1. An electrophotographic photosensitive member, comprising a support and a photosensitive layer provided on the support, wherein a plurality of depressed portions independent of each other are formed on the surface of the electrophotographic photosensitive member, the number of the depressed portions per 100 μ
- m square is 76 or more and 1,000 or less, openings of the depressed portions have an average major axis diameter of 3.9 μ
m or more and 12.0 μ
m or less, and the depressed portions are formed at the entire region of the surface. - View Dependent Claims (2, 3, 4, 5, 6)
- m square is 76 or more and 1,000 or less, openings of the depressed portions have an average major axis diameter of 3.9 μ
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7. A process cartridge which integrally holds an electrophotographic photosensitive member and a cleaning device, and is detachably mountable to a main body of an electrophotographic apparatus,
wherein the electrophotographic photosensitive member comprises a support and a photosensitive layer provided on the support, a plurality of depressed portions independent of each other are formed on the surface of the electrophotographic photosensitive member, the number of the depressed portions per 100 μ - m square is 76 or more and 1,000 or less,
openings of the depressed portions have an average major axis diameter of 3.9 μ
m or more and 12.0 μ
m or less,the cleaning device comprises a cleaning blade, and the depressed portions are formed at least at an area of the surface, the area coming into contact with the cleaning blade.
- m square is 76 or more and 1,000 or less,
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8. An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging device, an exposing device, a developing device, a transferring device and a cleaning device,
wherein the electrophotographic photosensitive member comprises a support and a photosensitive layer provided on the support, a plurality of depressed portions independent of each other are formed on the surface of the electrophotographic photosensitive member, the number of the depressed portions per 100 μ - m square is 76 or more and 1,000 or less,
openings of the depressed portions have an average major axis diameter of 3.9 μ
m or more and 12.0 μ
m or less,the cleaning device comprises a cleaning blade, and the depressed portions are formed at least at an area of the surface, the area coming into contact with the cleaning blade.
- m square is 76 or more and 1,000 or less,
Specification
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- Resources
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Current AssigneeCanon Kabushiki Kaisha (Canon Inc.)
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Original AssigneeCanon Kabushiki Kaisha (Canon Inc.)
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InventorsOchi, Atsushi, Uematsu, Hiroki, Ogaki, Harunobu, Shimada, Akira, Kikuchi, Toshihiro, Kawahara, Masataka, Sumida, Takayuki, Koganei, Akio, Maruyama, Akio, Teramoto, Kyoichi
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Primary Examiner(s)RODEE, CHRISTOPHER D
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Application NumberUS11/770,127Publication NumberTime in Patent Office1,055 DaysField of Search430/56, 430/66, 430/130, 430/132, 430/133US Class Current430/56CPC Class CodesG03G 5/00 Recording members for origi...G03G 5/04 Photoconductive layers; Cha...G03G 5/147 Cover layers
