Patents by Inventor Hisami Tanaka
Hisami Tanaka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11965499Abstract: A motor includes: a central shaft; a stator extending in an axial direction around the central shaft; a rotor facing an outer side in a radial direction of the stator and configured to rotate around the central shaft; a substrate located on one side in the axial direction with respect to the rotor and on which a rotation position detection circuit detecting a rotation position of the rotor is mounted; and a case located on one side in the axial direction with respect to the substrate and supporting the stator. The stator includes a restricting portion restricting a position in a circumferential direction of the substrate. The case includes a fixing portion fixing the substrate. The substrate includes a restricted portion whose position in the circumferential direction is restricted by the restricting portion, and a fixed portion fixed to the fixing portion.Type: GrantFiled: January 27, 2022Date of Patent: April 23, 2024Assignee: Max Co., Ltd.Inventors: Hiroyuki Tanaka, Takashi Ando, Tomohide Tsutsui, Hisami Oguri
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Patent number: 5707726Abstract: A process for producing an aluminum pipe is disclosed which has the steps of cutting the aluminum pipe on its periphery, and thereafter carrying out rotary pressure rolling. Also, an electrophotographic photosensitive member, a device unit, an electrophotographic apparatus and a developing roll having the aluminum pipe are disclosed.Type: GrantFiled: June 12, 1996Date of Patent: January 13, 1998Assignee: Canon Kabushiki KaishaInventors: Mutsuo Ohtaka, Hisami Tanaka, Shinichi Shibayama, Yosuke Okubo, Tatsu Nakajima
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Patent number: 5677095Abstract: An electrophotographic photosensitive member has an electroconductive support and a photosensitive layer thereon which contains a compound of Formula 3, 5-11, 13 or 14 as follows: ##STR1##Type: GrantFiled: November 22, 1995Date of Patent: October 14, 1997Assignee: Canon Kabushiki KaishaInventors: Toshihiro Kikuchi, Akio Maruyama, Noriko Ohtani, Shin Nagahara, Hisami Tanaka, Teigo Sakakibara, Takakazu Tanaka
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Patent number: 5669047Abstract: A charging member for electrophotography comprising a surface layer, wherein the surface layer comprises a resin and an alkali metal salt contained therein.Type: GrantFiled: June 5, 1995Date of Patent: September 16, 1997Assignee: Canon Kabushiki KaishaInventors: Masami Okuda, Hisami Tanaka, Junichi Kishi, Hiroyuki Ohmori, Takashi Koyama, Masafumi Hisamura
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Patent number: 5595848Abstract: A process for producing an aluminum pipe is disclosed which has the steps of cutting the aluminum pipe on its periphery, and thereafter carrying out rotary pressure rolling. Also, an electrophotographic photosensitive member, a device unit, an electrophotographic apparatus and a developing roll having the aluminum pipe are disclosed.Type: GrantFiled: February 15, 1995Date of Patent: January 21, 1997Assignee: Canon Kabushiki KaishaInventors: Mutsuo Ohtaka, Hisami Tanaka, Shinichi Shibayama, Yosuke Okubo, Tatsu Nakajima
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Patent number: 5484673Abstract: An electrophotographic photosensitive member of the present invention has a photosensitive lazer containing a compound represented by the formula (1): ##STR1## The electrophotographic photosensitive member has a high sensitivity and can maintain stable and excellent electrophotographic characteristics even when repeatedly used.Type: GrantFiled: February 23, 1995Date of Patent: January 16, 1996Assignee: Canon Kabushiki KaishaInventors: Toshihiro Kikuchi, Akio Maruyama, Noriko Ohtani, Shin Nagahara, Hisami Tanaka, Teigo Sakakibara, Takakazu Tanaka
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Patent number: 5358987Abstract: A new polysilane composition usable as an organic semiconductor which contains a specific polysilane compound of 6000 to 200000 in a weight average molecular weight in which all the substitutional groups and end groups being substituted by specific organic groups not containing oxygen atom, said polysilane compound not containing chlorine atom, and an acceptor level forming material or/and a donor level forming material.Type: GrantFiled: June 12, 1992Date of Patent: October 25, 1994Assignee: Canon Kabushiki KaishaInventors: Masahiro Kanai, Hisami Tanaka, Harumi Sakou, Tatuyuki Aoike, Kouichi Matuda, Keishi Saitou, Mituyuki Niwa, Masahumi Sano
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Patent number: 5354385Abstract: A solar cell, comprising a solar cell unit and a protective layer formed on the solar cell unit, wherein the protective layer comprises conductive particles.Type: GrantFiled: September 29, 1992Date of Patent: October 11, 1994Assignee: Canon Kabushiki KaishaInventors: Yuichi Hashimoto, Teigo Sakakibara, Hisami Tanaka
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Patent number: 5344501Abstract: A solar cell, comprising a solar cell unit and a protective layer formed on the solar cell unit, wherein said protective layer comprises a polymer formed by polymerization of a cyclotriphosphazene monomer represented by the following formula (I): ##STR1## wherein R.sub.1 to R.sub.6 independently denote an ethylenically unsaturated polymerizable group. The cyclophosphazene monomer preferably contains R.sub.1 to R.sub.6 which are represented by the formula (I): ##STR2## wherein R.sub.7 denotes an alkylene group, arylene group, alkyl-substituted arylene group, alkylamide group arylamide group or polyoxyalkylene group, and R.sub.8 denotes a hydrogen atom or a methyl group. The polymer obtained from the cyclotriphosphazene monomer is effective for providing a solar cell having high and stable output efficiency, mechanical durability, and good environmental stability.Type: GrantFiled: March 23, 1993Date of Patent: September 6, 1994Assignee: Canon Kabushiki KaishaInventors: Yuichi Hashimoto, Hisami Tanaka
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Patent number: 5332635Abstract: An electrophotographic photosensitive member is disclosed which has an electroconductive support and a photosensitive layer formed thereon. The photosensitive layer contains at least one polycarbonate selected from the group consisting of polycarbonates (1) to (3); and a charge-transportion substance having the structure represented by the formula (4) or (5) and having an oxidation potential of not less than 0.6 eV. Also, an electrophotographic apparatus, device unit and facsimile machine employing the electrophotographic photosensitive member are disclosed.Type: GrantFiled: October 21, 1992Date of Patent: July 26, 1994Assignee: Canon Kabushik KaishaInventor: Hisami Tanaka
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Patent number: 5236798Abstract: An electrophotographic light receiving member comprising a substrate and a light receiving layer having a multi-layered structure disposed on said substrate, said light receiving layer comprising at least a photoconductive layer and a surface layer being stacked in this order from the side of said substrate, said photoconductive layer being formed of a non-single crystal material containing silicon atoms as the matrix and at least one kind of atoms selected from the group consisting of hydrogen atoms and halogen atoms, and said surface layer being formed of a polysilane compound having a weight average molecular weight of 6000 to 200000 and having at least an oxygen-free organic group selected from the group consisting of alkyl group, cycloalkyl group, aryl group and aralkyl group at the terminals.Type: GrantFiled: September 25, 1990Date of Patent: August 17, 1993Assignee: Canon Kabushiki KaishaInventors: Tatsuyuki Aoike, Koichi Matsuda, Keishi Saitoh, Mitsuyuki Niwa, Masafumi Sano, Hisami Tanaka
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Patent number: 5220181Abstract: An improved junction type photovoltaic element, characterized by having an organic semiconductor layer formed of a polysilane compound of 6000 to 200000 in weight average molecular weight which is represented by the following general formula (I): ##STR1## Wherein, R.sub.1 stands for an albyl group of 1 to 2 carbon atoms; R.sub.2 stands for an alkyl group, cycloalkyl group, aryl group or aralkyl group of 3 to 8 carbon atoms; R.sub.3 stands for an alkyl group of 1 to 4 carbon atoms; R.sub.4 stands for an alkyl group of 1 to 4 carbon atoms; A and A' respectively stands for an alkyl group, cycloalkyl group, aryl group or aralkyl group of 4 to 12 carbon atoms wherein the two substituents may be the same or different one from the other; and each of n and m is a mole ratio showing the proportion of the number of respective monomers versus the total of the monomers in the polymer wherein n+m=1, 0<n.ltoreq.1 and 0.ltoreq.m<1.Type: GrantFiled: January 15, 1992Date of Patent: June 15, 1993Assignee: Canon Kabushiki KaishaInventors: Masahiro Kanai, Hisami Tanaka, Harumi Sakou
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Patent number: 5190837Abstract: An image holding member comprises an electroconductive substrate, a resin layer, and an image holding layer. The resin layer is placed between the electroconductive substrate and the image holding layer. The resin layer comprises metal-coated fine resin particles, and a binder resin.Type: GrantFiled: October 17, 1990Date of Patent: March 2, 1993Assignee: Canon Kabushiki KaishaInventors: Kiyoshi Sakai, Hisami Tanaka, Naoto Fujimura, Teigo Sakakibara, Takashi Koyama
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Patent number: 5159042Abstract: There are provided a new polysilane compound having a weight average molecular weight of 6000 to 200,000, having neither chlorine radical nor other radicals resulted from side reaction, and all the Si radicals of which not having any oxygen, and a process for the production thereof.Said polysilane compound can be utilized in the preparation of various electronic devices, medical devices, etc., thus it is a high molecular substance which has a high industrial value in use.There is also provided an electrophotographic photosensitive member having a light receiving layer containing said polysilane compound.Type: GrantFiled: August 1, 1990Date of Patent: October 27, 1992Assignee: Canon Kabushiki KaishaInventors: Hisami Tanaka, Harumi Sakou
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Patent number: 5112708Abstract: A member for charging comprises a surface layer formed of a N-alkoxymethylated nylon. A contact charging method performs charging of a member to be charged arranged in contact with the member for charging by applying externally a voltage on the member for charging. An electrophotographic device comprises the member for charging and an electrophotographic photosensitive member arranged in contact with the member for charging.Type: GrantFiled: May 2, 1991Date of Patent: May 12, 1992Assignee: Canon Kabushiki KaishaInventors: Masami Okunuki, Hisami Tanaka, Hiroyuki Ohmori, Masafumi Hisamura
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Patent number: 5089851Abstract: There is provided a charging member comprising an electroconductive substrate, and an elastic layer, an electroconductive layer and a resistance layer disposed in this order on the substrate. Such charging member provides good contact with a photosensitive member, to provide good image quality without causing an image defect such as white spot based on charging unevenness. Further, the charging member causes no leak even when the photosensitive member has a pin hole, and reduced the level of noise based on an AC voltage to be applied thereto.Type: GrantFiled: February 14, 1989Date of Patent: February 18, 1992Assignee: Canon Kabushiki KaishaInventors: Hisami Tanaka, Masami Okunuki
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Patent number: 5008706Abstract: An electrophotographic apparatus including a photosensitive member and a charging member disposed in contact with the photosensitive member; the photosensitive member being capable of being charged by applying a voltage to the charging member; wherein the ten-point mean surface roughness (Rz.sub.1) of the photosensitive member and the ten-point means surface roughness (Rz.sub.2) of the charging member satisfy the following relationships:______________________________________ 0.1 micron .ltoreq. Rz.sub.1 + Rz.sub.2 .ltoreq. 6.0 microns, 0.05 micron .ltoreq. Rz.sub.1 .ltoreq. 5.0 microns, and 0.05 micron .ltoreq. Rz.sub.2 .ltoreq.5.0 microns.Type: GrantFiled: October 25, 1989Date of Patent: April 16, 1991Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Ohmori, Hisami Tanaka, Masami Okunuki
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Patent number: 4975745Abstract: An electrophotographic photosensitive member has a photosensitive layer containing a photoconductive pigment dispersed in a resin and for forming an image according to the reversal developing system, characterized in that:said resin contains an acrylic resin having the structural unit represented by the formula: ##STR1## (wherein R.sub.1 and R.sub.2 each represent an alkyl group, an aralkyl group or an aryl group.Type: GrantFiled: June 27, 1989Date of Patent: December 4, 1990Assignee: Canon Kabushiki KaishaInventors: Hisami Tanaka, Hideo Kawahara
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Patent number: 4948690Abstract: An electrophotographic photosensitive member comprises an intermediate layer between a support and a photosensitive layer, wherein said intermediate layer contains spherical resin fine powder.Type: GrantFiled: January 11, 1990Date of Patent: August 14, 1990Assignee: Canon Kabushiki KaishaInventors: Masafumi Hisamura, Naoto Fujimura, Hisami Tanaka
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Patent number: 4877701Abstract: A photosensitive member for electrophotography which is excellent in successive copying characteristics as well as mechanical durability is provided. The photosensitive member comprises a photosensitive layer, at least the surface portion of which comprises a lubricant, and a charge-transporting substance having an oxidation potential of 0.6 volt or above.Type: GrantFiled: July 20, 1987Date of Patent: October 31, 1989Assignee: Canon Kabushiki KaishaInventors: Masaaki Hiro, Tomohiro Kimura, Hisami Tanaka, Noboru Kashimura, Shigemori Tanaka, Hitoshi Tohma, Masafumi Hisamura