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1 JP2018013635A
電子写真感光体、プロセスカートリッジおよび電子写真装置
Title (English): Electronic photo photosensors, processing boxes and electronic photo devices
Publication/Patent Number: JP2018013635A Publication Date: 2018-01-25 Application Number: 2016143545 Filing Date: 2016-07-21 Inventor: Tanaka, Masato   Nishida, Takeshi   Kumoi, Hirofumi   Assignee: CANON INC   IPC: G03G5/05 Abstract: 【課題】常温常湿下だけでなく、低温低湿下であっても、高感度、特に半導体レーザー波長領域で高感度であり、なおかつ、ゴーストなどの画像欠陥の少ない画像を供給可能な電子写真感光体、該電子写真感光体を有するプロセスカートリッジおよび電子写真装置を提供する。【解決手段】導電性支持体上に電荷発生物質を含有する電荷発生層と電荷輸送物質を含有する電荷輸送層とをこの順に電子写真感光体において、該電荷発生層が、ジアリールホスフィンスルフィド構造を有する化合物、およびジアリールホスフィンオキシド構造を有する化合物から選択される少なくとも1種の化合物を含有する層である。【選択図】なし 【課題】常温常湿下だけでなく、低温低湿下であっても、高感度、特に半導体レーザー波長領域で高感度であり、なおかつ、ゴーストなどの画像欠陥の少ない画像を供給可能な電子写真感光体、該電子写真感光体を有するプロセスカートリッジおよび電子写真装置を提供する。【解決手段】導電性支持体上に電荷発生物質を含有する電荷発生層と電荷輸送物質を含有する電荷輸送層とをこの順に電子写真感光体において、該電荷発生層が、ジアリールホスフィンスルフィド構造を有する化合物、およびジアリールホスフィンオキシド構造を有する化合物から選択される少なくとも1種の化合物を含有する層である。【選択図 ...More ...Less
2 US2018031985A1
ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS
Publication/Patent Number: US2018031985A1 Publication Date: 2018-02-01 Application Number: 15/663,421 Filing Date: 2017-07-28 Inventor: Sakakibara, Akira   Miura, Daisuke   Nishida, Tsutomu   Ito, Yota   Takagi, Shinji   Kumoi, Hirofumi   Taniguchi, Takahisa   Assignee: Canon Kabushiki Kaisha   IPC: G03G15/00 Abstract: An electrophotographic photosensitive member includes a support, a charge generating layer containing a charge generation material, and a charge transporting layer containing a charge transport material in this order, the charge transporting layer serving as a surface layer. The charge transporting layer contains a polycarbonate resin having a particular structural unit. An electrophotographic photosensitive member includes a support, a charge generating layer containing a charge generation material, and a charge transporting layer containing a charge transport material in this order, the charge transporting layer serving as a surface layer. The ...More ...Less
3 US201859558A1
ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS
Publication/Patent Number: US201859558A1 Publication Date: 2018-03-01 Application Number: 20/171,566 Filing Date: 2017-08-03 Inventor: Sakakibara, Akira   Miura, Daisuke   Nishida, Tsutomu   Ito, Yota   Kumoi, Hirofumi   Taniguchi, Takahisa   Assignee: Canon Kabushiki Kaisha   IPC: G03G21/18 Abstract: An electrophotographic photosensitive member with suppressed potential variation even in the case that a protective layer including a cured material of a composition having a polymerizable functional group is used is provided. An electrophotographic photosensitive member including a support, a charge generation layer, a charge transport layer containing a charge transporting material, and a protective layer, in the order presented, wherein the charge transport layer contains a polycarbonate resin having a structure selected from a group A and a structure selected from a group B, and the protective layer includes a cured material of a composition containing a compound having at least a functional group selected from chain-polymerizable functional groups and sequential polymerizable functional groups. An electrophotographic photosensitive member with suppressed potential variation even in the case that a protective layer including a cured material of a composition having a polymerizable functional group is used is provided. An electrophotographic photosensitive member ...More ...Less
4 US9921499B2
Electrophotographic photosensitive member, process cartridge, electrophotographic apparatus, and phthalocyanine pigment
Publication/Patent Number: US9921499B2 Publication Date: 2018-03-20 Application Number: 15/334,884 Filing Date: 2016-10-26 Inventor: Kawata, Isao   Ito, Yuto   Kawahara, Masataka   Tanaka, Masato   Kumoi, Hirofumi   Kuno, Jumpei   Nishida, Tsutomu   Sakuma, Kazuko   Hinata, Shoma   Watariguchi, Kaname   Assignee: CANON KABUSHIKI KAISHA   IPC: C09B67/00 Abstract: An electrophotographic photosensitive member includes a substrate and a photosensitive layer containing a phthalocyanine pigment. The crystalline particles of the phthalocyanine pigment have a crystallite correlation length r and a particle size R of 400 nm or less, and a parameter k defined by r/R is in the range of 0.17 to 0.42. An electrophotographic photosensitive member includes a substrate and a photosensitive layer containing a phthalocyanine pigment. The crystalline particles of the phthalocyanine pigment have a crystallite correlation length r and a particle size R of 400 nm or less, and a ...More ...Less
5 EP3062153B1
ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, METHOD FOR MANUFACTURING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS
Publication/Patent Number: EP3062153B1 Publication Date: 2018-09-26 Application Number: 16156831.6 Filing Date: 2016-02-23 Inventor: Kawahara, Masataka   Uesugi, Hirotoshi   Maruyama, Akihiro   Kumoi, Hirofumi   Tanaka, Masato   Tomono, Hiroyuki   Hinata, Shoma   Ito, Yota   Miura, Daisuke   Anezaki, Takashi   Yamaai, Tatsuya   Sugiyama, Kazumichi   Assignee: Canon Kabushiki Kaisha   IPC: G03G5/05 Abstract: An electrophotographic photosensitive member (1) has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic photosensitive member and contains a polycarbonate resin having a structural unit selected from group A and a structural unit selected from group B (groups A and B defined in the disclosure). An electrophotographic photosensitive member (1) has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic ...More ...Less
6 JP2017190397A
MANUFACTURING METHOD OF PHTHALOCYANINE CRYSTAL AND ELECTROPHOTOGRAPHIC PHOTORECEPTOR
Publication/Patent Number: JP2017190397A Publication Date: 2017-10-19 Application Number: 2016080501 Filing Date: 2016-04-13 Inventor: Tanaka, Masato   Kumoi, Hirofumi   Assignee: CANON INC   IPC: C07F5/00 Abstract: PROBLEM TO BE SOLVED: To provide a manufacturing method of a phthalocyanine crystal having improved level of ghost at use initiation and after repeated use and suppressed variation.SOLUTION: There is provided a manufacturing method for obtaining a phthalocyanine crystal by mixing a phthalocyanine compound obtained by acid pasting and an organic compound and conducting crystal transformation PROBLEM TO BE SOLVED: To provide a manufacturing method of a phthalocyanine crystal having improved level of ghost at use initiation and after repeated use and suppressed variation.SOLUTION: There is provided a manufacturing method for obtaining a phthalocyanine crystal by ...More ...Less
7 US9665020B2
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
Publication/Patent Number: US9665020B2 Publication Date: 2017-05-30 Application Number: 14/664,678 Filing Date: 2015-03-20 Inventor: Miura, Daisuke   Ito, Yota   Anezaki, Takashi   Kumoi, Hirofumi   Assignee: Canon Kabushiki Kaisha   IPC: G03G5/04 Abstract: A charge transporting layer of an electrophotographic photosensitive member contains a polysiloxane resin having a terminal structure represented by the formula (1), at least one selected from the group consisting of a polycarbonate resin A having a structural unit represented by the formula (A) and a polyarylate resin B having a structural unit represented by the formula (B), and a charge transporting substance, wherein the content of the siloxane structure in the polysiloxane resin is not less than 0.5% by mass and not more than 10% by mass based on the total mass of whole resin in the charge transporting layer. A charge transporting layer of an electrophotographic photosensitive member contains a polysiloxane resin having a terminal structure represented by the formula (1), at least one selected from the group consisting of a polycarbonate resin A having a structural unit represented ...More ...Less
8 US9778581B2
Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
Publication/Patent Number: US9778581B2 Publication Date: 2017-10-03 Application Number: 14/607,868 Filing Date: 2015-01-28 Inventor: Ito, Yota   Anezaki, Takashi   Miura, Daisuke   Kumoi, Hirofumi   Assignee: Canon Kabushiki Kaisha   IPC: G03G5/047 Abstract: An electrophotographic photosensitive member includes a hole transporting layer containing a polyester resin having a structural unit expressed by formula (1) as a hole transporting substance.
9 JP2017075115A
PRODUCTION METHOD OF HYDROXYGALLIUM PHTHALOCYANINE CRYSTAL
Publication/Patent Number: JP2017075115A Publication Date: 2017-04-20 Application Number: 2015203010 Filing Date: 2015-10-14 Inventor: Tanaka, Masato   Kawahara, Masataka   Kumoi, Hirofumi   Assignee: CANON INC   IPC: C07D487/22 Abstract: PROBLEM TO BE SOLVED: To provide a production method of a hydroxygallium phthalocyanine crystal having excellent characteristics as a charge generating substance
10 JP6161297B2
ELECTROPHOTOGRAPHIC PHOTORECEPTOR
Publication/Patent Number: JP6161297B2 Publication Date: 2017-07-12 Application Number: 2013007316 Filing Date: 2013-01-18 Inventor: Tanaka, Daisuke   Anezaki, Takashi   Nishi, Masafumi   Shida, Kazuhisa   Kumoi, Hirofumi   Sugiyama, Kazumichi   Assignee: CANON INC   IPC: G03G5/047 Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor which achieves reduction in an initial frictional force (initial friction coefficient) and suppression of a plus memory
11 JP6214321B2
ELECTROPHOTOGRAPHIC PHOTORECEPTOR
Publication/Patent Number: JP6214321B2 Publication Date: 2017-10-18 Application Number: 2013214108 Filing Date: 2013-10-11 Inventor: Tanaka, Daisuke   Anezaki, Takashi   Nishi, Masafumi   Shida, Kazuhisa   Kumoi, Hirofumi   Sugiyama, Kazumichi   Assignee: CANON INC   IPC: G03G5/05 Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor that contains a siloxane-modified resin
12 JP2017083842A
ELECTROPHOTOGRAPHIC PHOTORECEPTOR
Publication/Patent Number: JP2017083842A Publication Date: 2017-05-18 Application Number: 2016211018 Filing Date: 2016-10-27 Inventor: Tanaka, Masato   Nishida, Takeshi   Kawahara, Masataka   Kawada, Isao   Sakuma, Kazuko   Kumoi, Hirofumi   Kuno, Junpei   Ito, Yuto   Toguchi, Kaname   Hinata, Shoma   Assignee: CANON INC   IPC: G03G5/06 Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor capable of achieving high level suppression effect of ghost phenomenon while maintaining chargeability required as the electrophotographic photoreceptor.SOLUTION: The electrophotographic photoreceptor has: a support medium; and a photosensitive layer containing a phthalocyanine pigment. In the phthalocyanine pigment PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor capable of achieving high level suppression effect of ghost phenomenon while maintaining chargeability required as the electrophotographic photoreceptor.SOLUTION: The electrophotographic photoreceptor has: a ...More ...Less
13 US2017123330A1
ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE,ELECTROPHOTOGRAPHIC APPARATUS, AND PHTHALOCYANINE PIGMENT
Publication/Patent Number: US2017123330A1 Publication Date: 2017-05-04 Application Number: 15/334,884 Filing Date: 2016-10-26 Inventor: Watariguchi, Kaname   Hinata, Shoma   Sakuma, Kazuko   Nishida, Tsutomu   Kuno, Jumpei   Kumoi, Hirofumi   Tanaka, Masato   Kawahara, Masataka   Ito, Yuto   Kawata, Isao   Assignee: CANON KABUSHIKI KAISHA   IPC: G03G15/00 Abstract: An electrophotographic photosensitive member includes a substrate and a photosensitive layer containing a phthalocyanine pigment. The crystalline particles of the phthalocyanine pigment have a crystallite correlation length r and a particle size R of 400 nm or less, and a parameter k defined by r/R is in the range of 0.17 to 0.42. An electrophotographic photosensitive member includes a substrate and a photosensitive layer containing a phthalocyanine pigment. The crystalline particles of the phthalocyanine pigment have a crystallite correlation length r and a particle size R of 400 nm or less, and a ...More ...Less
14 US9753385B2
Electrophotographic photosensitive member, method for manufacturing electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus
Publication/Patent Number: US9753385B2 Publication Date: 2017-09-05 Application Number: 15/054,017 Filing Date: 2016-02-25 Inventor: Ito, Yota   Miura, Daisuke   Hinata, Shoma   Tomono, Hiroyuki   Anezaki, Takashi   Yamaai, Tatsuya   Sugiyama, Kazumichi   Kawahara, Masataka   Uesugi, Hirotoshi   Maruyama, Akihiro   Kumoi, Hirofumi   Tanaka, Masato   Assignee: Canon Kabushiki Kaisha   IPC: G03G5/00 Abstract: An electrophotographic photosensitive member has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic photosensitive member and contains a polycarbonate resin having a structural unit selected from group A and a structural unit selected from group B (groups A and B defined in the disclosure). An electrophotographic photosensitive member has a support, a charge generation layer, and a charge transport layer in this order, the charge transport layer containing a charge transport material. The charge transport layer is a surface layer of the electrophotographic ...More ...Less
15 US2016252833A1
ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS
Publication/Patent Number: US2016252833A1 Publication Date: 2016-09-01 Application Number: 15/055,238 Filing Date: 2016-02-26 Inventor: Kumoi, Hirofumi   Kawahara, Masataka   Tanaka, Masato   Assignee: CANON KABUSHIKI KAISHA   IPC: G03G15/00 Abstract: An electrophotographic photosensitive member includes a support member, a charge generating layer, and a charge transport layer in that order. The charge generating layer contains a gallium phthalocyanine crystal containing therein at least one amide compound selected from the group consisting of N-methylformamide, N-propylformamide, and N-vinylformamide. The charge transport layer contains fluorine-containing resin particles and a fluorine-containing copolymer. An electrophotographic photosensitive member includes a support member, a charge generating layer, and a charge transport layer in that order. The charge generating layer contains a gallium phthalocyanine crystal containing therein at least one amide compound selected from the ...More ...Less
16 US2016154326A1
ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, METHOD FOR PRODUCING ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC APPARATUS
Publication/Patent Number: US2016154326A1 Publication Date: 2016-06-02 Application Number: 14/927,300 Filing Date: 2015-10-29 Inventor: Kumoi, Hirofumi   Hinata, Shoma   Kawahara, Masataka   Tanaka, Masato   Assignee: CANON KABUSHIKI KAISHA   IPC: G03G5/043 Abstract: The charge generating layer includes a gallium phthalocyanine crystal in which an organic compound (P) is contained, the organic compound (P) is at least one compound selected from the group consisting of dimethylsulfoxide, N,N-dimethylformamide, N-methylformamide, N-propylformamide, N-vinylformamide and N-methylpyrrolidone, the content of the organic compound (P) is 0.1% by mass or more and 1.5% by mass or less based on a gallium phthalocyanine in the gallium phthalocyanine crystal, and the charge transporting layer includes a resin having a siloxane structure, and a compound (Q) having a boiling point of 150° C. or more at 1 atm. The charge generating layer includes a gallium phthalocyanine crystal in which an organic compound (P) is contained, the organic compound (P) is at least one compound selected from the group consisting of dimethylsulfoxide, N,N-dimethylformamide, N-methylformamide ...More ...Less
17 US2016252832A1
ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, PROCESS CARTRIDGE, AND ELECTROPHOTOGRAPHIC APPARATUS, AND MIXED CRYSTAL OF HYDROXYGALLIUM PHTHALOCYANINE AND CHLOROGALLIUM PHTHALOCYANINE AND METHOD OF PRODUCING THE CRYSTALLINE COMPLEX
Publication/Patent Number: US2016252832A1 Publication Date: 2016-09-01 Application Number: 15/054,006 Filing Date: 2016-02-25 Inventor: Tanaka, Masato   Nishida, Tsutomu   Kumoi, Hirofumi   Assignee: CANON KABUSHIKI KAISHA   IPC: G03G15/00 Abstract: Provided is an electrophotographic photosensitive member including a support and a photosensitive layer. The photosensitive layer contains crystalline complexes of hydroxygallium phthalocyanine and chlorogallium phthalocyanine, the crystalline complexes containing an amide compound represented by Formula (1): R1—NHCHO, where R1 represents a methyl group, a propyl group, or a vinyl group. Provided is an electrophotographic photosensitive member including a support and a photosensitive layer. The photosensitive layer contains crystalline complexes of hydroxygallium phthalocyanine and chlorogallium phthalocyanine, the crystalline complexes containing an amide ...More ...Less
18 JP2016102933A
ELECTROPHOTOGRAPHIC PHOTORECEPTOR
Publication/Patent Number: JP2016102933A Publication Date: 2016-06-02 Application Number: 2014241864 Filing Date: 2014-11-28 Inventor: Tanaka, Masato   Kawahara, Masataka   Kumoi, Hirofumi   Hinata, Shoma   Assignee: CANON INC   IPC: G03G5/05 Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor capable of outputting a high-quality image
19 JP2016164658A
ELECTROPHOTOGRAPHIC PHOTORECEPTOR
Publication/Patent Number: JP2016164658A Publication Date: 2016-09-08 Application Number: 2016034902 Filing Date: 2016-02-25 Inventor: Tanaka, Masato   Kawahara, Masataka   Kumoi, Hirofumi   Assignee: CANON INC   IPC: G03G5/047 Abstract: PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor capable of outputting a high-quality image having improved potential variation after repeated use; and to provide a process cartridge and an electrophotographic device which have the electrophotographic photoreceptor.SOLUTION: An electrophotographic photoreceptor has a support PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor capable of outputting a high-quality image having improved potential variation after repeated use; and to provide a process cartridge and an electrophotographic device which have the electrophotographic ...More ...Less
20 JP2016061900A
PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC DEVICE
Publication/Patent Number: JP2016061900A Publication Date: 2016-04-25 Application Number: 2014189086 Filing Date: 2014-09-17 Inventor: Anezaki, Takashi   Ogaki, Harunobu   Kumoi, Hirofumi   Ogino, Hiromoto   Assignee: CANON INC   IPC: G03G5/00 Abstract: PROBLEM TO BE SOLVED: To provide a process cartridge that improves slidability between and durability of an interval guaranteeing member and an electrophotographic photoreceptor