Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus
First Claim
Patent Images
1. An electrophotographic photosensitive member, comprising a convex portion and a concave portion on a surface of the electrophotographic photosensitive member continuously in a peripheral direction of the electrophotographic photosensitive member, and alternately in an axial direction of the electrophotographic photosensitive member,wherein a width w of the concave portion is 30 μ
- m or more and 100 μ
m or less,a depth d of the concave portion is 1 μ
m or more and 5 μ
m or less,the convex portion has a rising slope and a descending slope in the peripheral direction of the electrophotographic photosensitive member, anda distance from a starting point of the rising slope to an end point of the descending slope is 300 μ
m or less, and a distance from a starting point of the descending slope to an end point of the rising slope is 300 μ
m or less.
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Accused Products
Abstract
An electrophotographic photosensitive member, a process cartridge and an electrophotographic apparatus wherein a streak-like image defect otherwise occurring in output in a low printing mode performed under a H/H environment can be reduced are provided. A surface of the photosensitive member has a convex and concave portions continuously in a peripheral direction of the photosensitive member, and alternately in an axial direction of the photosensitive member, a width w of the concave portion is 30 to 100 μm, a depth d of the concave portion is 1 to 5 μm, the convex portion has a rising slope and a descending slope in the peripheral direction of the photosensitive member, and a distance from a starting point of the rising slope to an end point of the descending slope and a distance from a starting point of the descending slope to an end point of the rising slope are 300 μm or less.
18 Citations
12 Claims
-
1. An electrophotographic photosensitive member, comprising a convex portion and a concave portion on a surface of the electrophotographic photosensitive member continuously in a peripheral direction of the electrophotographic photosensitive member, and alternately in an axial direction of the electrophotographic photosensitive member,
wherein a width w of the concave portion is 30 μ - m or more and 100 μ
m or less,a depth d of the concave portion is 1 μ
m or more and 5 μ
m or less,the convex portion has a rising slope and a descending slope in the peripheral direction of the electrophotographic photosensitive member, and a distance from a starting point of the rising slope to an end point of the descending slope is 300 μ
m or less, and a distance from a starting point of the descending slope to an end point of the rising slope is 300 μ
m or less. - View Dependent Claims (2)
- m or more and 100 μ
-
3. An electrophotographic photosensitive member, comprising a convex portion and a concave portion on a surface of the electrophotographic photosensitive member continuously in a peripheral direction of the electrophotographic photosensitive member, and alternately in an axial direction of the electrophotographic photosensitive member,
wherein the convex portion has a rising slope and a descending slope in the peripheral direction of the electrophotographic photosensitive member, a distance from a starting point of the rising slope to an end point of the descending slope is 300 μ - m or less, and a distance from a starting point of the descending slope to an end point of the rising slope is 300 μ
m or less, andat least one of rising slopes of convex portions adjacent to each other is shifted by 20 μ
m or more in the axial direction of the electrophotographic photosensitive member. - View Dependent Claims (4)
- m or less, and a distance from a starting point of the descending slope to an end point of the rising slope is 300 μ
-
5. A process cartridge, comprising at least an electrophotographic photosensitive member having a photosensitive layer on a cylindrical support;
- and a cleaning blade,
wherein a surface of the electrophotographic photosensitive member has a convex portion and a concave portion continuously in a peripheral direction of the electrophotographic photosensitive member and alternately in an axial direction of the electrophotographic photosensitive member, a width w of the concave portion is 30 μ
m or more and 100 μ
m or less,a depth d of the concave portion is 1 μ
m or more and 5 μ
m or less,the convex portion has a rising slope and a descending slope in a rotating direction of the electrophotographic photosensitive member, and a distance from a starting point of the rising slope to an end point of the descending slope is 300 μ
m or less, and a distance from a starting point of the descending slope to an end point of the rising slope is 300 μ
m or less. - View Dependent Claims (6)
- and a cleaning blade,
-
7. An electrophotographic apparatus comprising:
- a process cartridge at least including an electrophotographic photosensitive member having a photosensitive layer on a cylindrical support, and a cleaning blade;
a charging unit;
an exposing unit;
a developing unit; and
a transfer unit,wherein a surface of the electrophotographic photosensitive member has a convex portion and a concave portion continuously in a peripheral direction of the electrophotographic photosensitive member and alternately in an axial direction of the electrophotographic photosensitive member, a width w of the concave portion is 30 μ
m or more and 100 μ
m or less,a depth d of the concave portion is 1 μ
m or more and 5 μ
m or less,the convex portion has a rising slope and a descending slope in a rotating direction of the electrophotographic photosensitive member, and a distance from a starting point of the rising slope to an end point of the descending slope is 300 μ
m or less, and a distance from a starting point of the descending slope to an end point of the rising slope is 300 μ
m or less. - View Dependent Claims (8)
- a process cartridge at least including an electrophotographic photosensitive member having a photosensitive layer on a cylindrical support, and a cleaning blade;
-
9. A process cartridge, comprising at least an electrophotographic photosensitive member having a photosensitive layer on a cylindrical support;
- and a cleaning blade,
wherein a surface of the electrophotographic photosensitive member has a convex portion and a concave portion continuously in a peripheral direction of the electrophotographic photosensitive member and alternately in an axial direction of the electrophotographic photosensitive member, wherein the convex portion has a rising slope and a descending slope in a rotating direction of the electrophotographic photosensitive member, a distance from a starting point of the rising slope to an end point of the descending slope is 300 μ
m or less, and a distance from a starting point of the descending slope to an end point of the rising slope is 300 μ
m or less, andat least one of rising slopes of convex portions adjacent to each other is shifted by 20 μ
m or more in the axial direction of the electrophotographic photosensitive member. - View Dependent Claims (10)
- and a cleaning blade,
-
11. An electrophotographic apparatus, comprising:
- a process cartridge at least including an electrophotographic photosensitive member having a photosensitive layer on a cylindrical support, and a cleaning blade;
a charging unit;
an exposing unit;
a developing unit; and
a transfer unit,wherein a surface of the electrophotographic photosensitive member has a convex portion and a concave portion continuously in a peripheral direction of the electrophotographic photosensitive member and alternately in an axial direction of the electrophotographic photosensitive member, the convex portion has a rising slope and a descending slope in the rotating direction of the electrophotographic photosensitive member, a distance from a starting point of the rising slope to an end point of the descending slope is 300 μ
m or less, and a distance from a starting point of the descending slope to an end point of the rising slope is 300 μ
m or less, andat least one of rising slopes of convex portions adjacent to each other is shifted by 20 μ
m or more in the axial direction of the electrophotographic photosensitive member. - View Dependent Claims (12)
- a process cartridge at least including an electrophotographic photosensitive member having a photosensitive layer on a cylindrical support, and a cleaning blade;
Specification
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Current AssigneeCanon Kabushiki Kaisha (Canon Inc.)
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Original AssigneeCanon Kabushiki Kaisha (Canon Inc.)
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InventorsKitamura, Wataru, Ikari, Kenichi
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Primary Examiner(s)TRAN, HOAN H
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Application NumberUS15/413,758Publication NumberTime in Patent Office294 DaysField of Search399107, 399110, 399111, 399116, 399130, 399159US Class CurrentCPC Class CodesG03G 15/75 Details relating to xerogra...G03G 21/18 using a processing cartridg...G03G 5/043 Photoconductive layers char...G03G 5/147 Cover layers
