EP0482884A1
Expired / Lapsed
EP
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Electrophotographic photosensitive member
Assignee: Canon Inc
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Filing: 1991-10-22
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Granted: —
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Expires: 2011-10-22
Abstract
Abstract An electrophotographic photosensitive member, comprising: an electroconductive support and a photosensitive layer disposed on the electroconductive support, wherein the photosensitive layer comprises (i) oxytitanium phthalocyanine having a crystal form characterized by main peaks specified by Bragg angles (2ϑ ± 0.2 degree) of 9.0 degrees, 14.2 degrees, 23.9 degrees and 27.1 degrees in X-ray diffraction pattern based on CuKα characteristic X-rays, and (ii) a fluorene compound represented by the following formula (I): wherein Ar¹ and Ar² independently denote aryl group optionally having a substituent; R¹ and R² independently denote alkyl group optionally having a substituent, aralkyl group optionally having a substituent or aryl group optionally having a substituent; and R³ denotes hydrogen atom, alkyl group optionally having a substituent, alkoxy group optionally having a substituent, hydroxyl group or halogen atom.
Inventors
- 👤 Toshihiro C/O Canon Kabushiki Kaisha Kikuchi
- 👤 Akihiro C/O Canon Kabushiki Kaisha Senoo
- 👤 Takakazu C/O Canon Kabushiki Kaisha Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 20:38
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0618; G03G5/0612; G03G5/0614; G03G5/06142; G03G5/0664; G03G5/0696
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
129 words
An electrophotographic photosensitive member, comprising: an electroconductive support and a photosensitive layer disposed on the electroconductive support, wherein the photosensitive layer comprises (i) oxytitanium phthalocyanine having a crystal form characterized by main peaks specified by Bragg angles (2ϑ ± 0.2 degree) of 9.0 degrees, 14.2 degrees, 23.9 degrees and 27.1 degrees in X-ray diffraction pattern based on CuKα characteristic X-rays, and (ii) a fluorene compound represented by the following formula (I): wherein Ar¹ and Ar² independently denote aryl group optionally having a substituent; R¹ and R² independently denote alkyl group optionally having a substituent, aralkyl group optionally having a substituent or aryl group optionally having a substituent; and R³ denotes hydrogen atom, alkyl group optionally having a substituent, alkoxy group optionally having a substituent, hydroxyl group or halogen atom.
Claim 2
Dependent Claim
15 words
A photosensitive member according to Claim 1, wherein Ar¹ and Ar² independently denote 4-methylphenyl group.
Claim 3
Dependent Claim
18 words
A photosensitive member according to Claim 1, wherein R¹ and R² independently denote methyl group or ethyl group.
Claim 4
Dependent Claim
26 words
A photosensitive member according to Claim 1, herein Ar¹ and Ar² independently denote 4-methylphenyl group and R¹ and R² independently denote methyl group or ethyl group.
Claim 5
Dependent Claim
21 words
A photosensitive member according to Claim 1, wherein the photosensitive layer includes a charge generation layer and a charge transport layer.
Claim 6
Dependent Claim
16 words
A photosensitive member according to Claim 5, wherein the charge generation layer comprises the oxytitanium phthalocyanine.
Claim 7
Dependent Claim
21 words
A photosensitive member according to Claim 5, wherein the charge transport layer comprises the fluorene compound represented by the formula (I).
Claim 8
Dependent Claim
30 words
A photosensitive member according to Claim 5, wherein the charge generation layer comprises the oxytitanium phthalocyanine; and the charge transport layer comprises the fluorene compound represented by the formula (I).
Claim 9
Dependent Claim
23 words
A photosensitive member according to Claim 5, comprising the electroconductive support, the charge generation layer and the charge transport layer in this order.
Claim 10
Dependent Claim
23 words
A photosensitive member according to Claim 5, comprising the electroconductive support, the charge transport layer and the charge generation layer in this order.
Claim 11
Dependent Claim
19 words
A photosensitive member according to Claim 1, comprising an undercoating layer between the electroconductive support and the photosensitive layer.
Claim 12
Dependent Claim
15 words
A photosensitive member according to Claim 1, comprising a protective layer on the photosensitive layer.
Claim 13
Dependent Claim
38 words
An electrophotographic apparatus, including: an electrophotographic photosensitive member according to Claim 1, means for forming an electrostatic latent image, means for developing the formed electrostatic latent image and means for transferring the developed image to a transfer-receiving material.
Claim 14
Dependent Claim
51 words
A device unit, including: an electrophotographic photosensitive member according to Claim 1, a charging means and a cleaning means; wherein the photosensitive member, the charging means and the cleaning means are integrally supported to form a single unit, which can be connected to or released from an apparatus body as desired.
Claim 15
Dependent Claim
12 words
A device unit according to Claim 14, further including a developing means.
Claim 16
Dependent Claim
29 words
A facsimile machine, comprising: an electrophotographic apparatus and means for receiving image data from a remote terminal, the electrophotographic apparatus including an electrophotographic photosensitive member according to Claim 1.
References Cited (Backward Citations)
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