Patents by Inventor Kazuhiko Arai
Kazuhiko Arai 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: 10859008Abstract: A rotational angle determining device periodically samples a resolver signal output from a resolver receiving an alternating current excitation signal, the sampling being performed at a timing at which the excitation signal reaches a peak or trough value, based on a timer signal to which initial phase alignment is performed with respect to the excitation signal, and then the device performs A/D conversion of a voltage value of the sampled resolver signal, to determine the rotational angle of the rotor of the resolver. The excitation signal is periodically sampled at a predetermined timing based on the timer signal, and a presence or absence of a phase shift between the excitation and timer signals is detected based on a change in A/D converted value AD1n (n=1, 2, . . . ) obtained by A/D conversion of a voltage value of the sampled excitation signal.Type: GrantFiled: February 1, 2018Date of Patent: December 8, 2020Assignee: Hitachi Automotive Systems, Ltd.Inventors: Hiroyuki Mamada, Kazuhiko Arai, Shingo Ooba
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Publication number: 20200011255Abstract: A rotational angle determining device periodically samples a resolver signal output from a resolver receiving an alternating current excitation signal, the sampling being performed at a timing at which the excitation signal reaches a peak or trough value, based on a timer signal to which initial phase alignment is performed with respect to the excitation signal, and then the device performs A/D conversion of a voltage value of the sampled resolver signal, to determine the rotational angle of the rotor of the resolver. The excitation signal is periodically sampled at a predetermined timing based on the timer signal, and a presence or absence of a phase shift between the excitation and timer signals is detected based on a change in A/D converted value AD1n (n=1, 2, . . . ) obtained by A/D conversion of a voltage value of the sampled excitation signal.Type: ApplicationFiled: February 1, 2018Publication date: January 9, 2020Inventors: Hiroyuki MAMADA, Kazuhiko ARAI, Shingo OOBA
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Patent number: 9958821Abstract: Provided is an image forming apparatus including an image forming unit that forms an image on a recording medium, and an applying unit that causes powder included in a liquid mixture to be interposed between the recording medium and the image forming unit by applying the liquid mixture to the recording medium, or to the image forming unit which comes into contact with the recording medium, wherein the recording medium includes an image forming layer, an adhesive layer, and a base layer, and the liquid mixture includes the powder reducing adhesion of the adhesive layer and volatile liquid.Type: GrantFiled: July 7, 2016Date of Patent: May 1, 2018Assignee: FUJI XEROX CO., LTD.Inventors: Yutaka Kiuchi, Masayo Higashimura, Kazuhiko Arai
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Publication number: 20160320719Abstract: Provided is an image forming apparatus including an image forming unit that forms an image on a recording medium, and an applying unit that causes powder included in a liquid mixture to be interposed between the recording medium and the image forming unit by applying the liquid mixture to the recording medium, or to the image forming unit which comes into contact with the recording medium, wherein the recording medium includes an image forming layer, an adhesive layer, and a base layer, and the liquid mixture includes the powder reducing adhesion of the adhesive layer and volatile liquid.Type: ApplicationFiled: July 7, 2016Publication date: November 3, 2016Applicant: FUJI XEROX CO., LTD.Inventors: Yutaka KIUCHI, Masayo HIGASHIMURA, Kazuhiko ARAI
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Publication number: 20160320736Abstract: Provided is an image forming apparatus including an image forming unit that forms an image on a recording medium, and an applying unit that causes powder included in a liquid mixture to be interposed between the recording medium and the image forming unit by applying the liquid mixture to the recording medium, or to the image forming unit which comes into contact with the recording medium, wherein the recording medium includes an image forming layer, an adhesive layer, and a base layer, and the liquid mixture includes the powder reducing adhesion of the adhesive layer and volatile liquid.Type: ApplicationFiled: July 7, 2016Publication date: November 3, 2016Applicant: FUJI XEROX CO., LTD.Inventors: Yutaka KIUCHI, Masayo HIGASHIMURA, Kazuhiko ARAI
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Patent number: 9411310Abstract: A cooling device cools a continuous resin film, which is transported and onto which a toner image is transferred, after the toner image is heated so that the toner image is fixed to the resin film. The resin film to which the toner image is fixed is cooled in such a manner that an image surface side of the resin film is convexly curved.Type: GrantFiled: July 22, 2015Date of Patent: August 9, 2016Assignee: FUJI XEROX CO., LTD.Inventors: Yutaka Kiuchi, Kazuhiko Arai, Kazunori Numao, Masayo Higashimura, Masayoshi Nakao, Kunihiko Sato
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Patent number: 9411263Abstract: Provided is an image forming apparatus including an image forming unit that forms an image on a recording medium, and an applying unit that causes powder included in a liquid mixture to be interposed between the recording medium and the image forming unit by applying the liquid mixture to the recording medium, or to the image forming unit which comes into contact with the recording medium, wherein the recording medium includes an image forming layer, an adhesive layer, and a base layer, and the liquid mixture includes the powder reducing adhesion of the adhesive layer and volatile liquid.Type: GrantFiled: October 10, 2014Date of Patent: August 9, 2016Assignee: FUJI XEROX CO., LTD.Inventors: Yutaka Kiuchi, Masayo Higashimura, Kazuhiko Arai
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Publication number: 20160216689Abstract: A cooling device cools a continuous resin film, which is transported and onto which a toner image is transferred, after the toner image is heated so that the toner image is fixed to the resin film. The resin film to which the toner image is fixed is cooled in such a manner that an image surface side of the resin film is convexly curved.Type: ApplicationFiled: July 22, 2015Publication date: July 28, 2016Applicant: FUJI XEROX CO., LTD.Inventors: Yutaka KIUCHI, Kazuhiko ARAI, Kazunori NUMAO, Masayo HIGASHIMURA, Masayoshi NAKAO, Kunihiko SATO
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Publication number: 20160216660Abstract: A fixing device includes a heating unit that heats an unfixed image on a recording medium, which is deformed by heating, and hence fixes the unfixed image; and a transport member that closely contacts a no-image surface of the recording medium and transports the recording medium while causing a close contact force to act on the recording medium against a deformation force, which is generated at the recording medium by the heating of the heating unit. The close contact force of the recording medium with respect to the transport member is larger than the deformation force generated at the recording medium.Type: ApplicationFiled: August 24, 2015Publication date: July 28, 2016Applicant: FUJI XEROX CO., LTD.Inventors: Yuki YOKOYAMA, Kazuhiko ARAI, Kazunori NUMAO, Atsumi KURITA, Masayo HIGASHIMURA, Keitaro MORI
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Patent number: 9400461Abstract: A fixing device includes a heating unit that heats an unfixed image on a recording medium, which is deformed by heating, and hence fixes the unfixed image; and a transport member that closely contacts a no-image surface of the recording medium and transports the recording medium while causing a close contact force to act on the recording medium against a deformation force, which is generated at the recording medium by the heating of the heating unit. The close contact force of the recording medium with respect to the transport member is larger than the deformation force generated at the recording medium.Type: GrantFiled: August 24, 2015Date of Patent: July 26, 2016Assignee: FUJI XEROX CO., LTD.Inventors: Yuki Yokoyama, Kazuhiko Arai, Kazunori Numao, Atsumi Kurita, Masayo Higashimura, Keitaro Mori
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Patent number: 9274483Abstract: An image forming apparatus includes an image forming unit and a controller. The image forming unit forms an image on a continuous recording medium by transferring to the continuous recording medium a toner image obtained by developing a latent image formed on a photoreceptor. The controller controls the image forming unit such that an image based on image information is formed in a specific image area on the continuous recording medium, and at the same time, a specific image pattern is formed in a specific side area outside the image area on the continuous recording medium.Type: GrantFiled: March 10, 2014Date of Patent: March 1, 2016Assignee: FUJI XEROX CO., LTD.Inventors: Yutaka Kiuchi, Kazuhiko Arai, Kunihiko Sato, Sakon Takahashi, Masayo Higashimura, Kosuke Yamada, Atsumi Kurita, Daisuke Nakai
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Patent number: 9244386Abstract: A developing device includes a first developer holder and a second developer holder. The first developer holder is disposed so as to face an image holding member and rotates so as to move in a direction opposite to a direction of movement of the image holding member at a first facing portion. The second developer holder is disposed downstream from the first developer holder in the direction of movement of the image holding member so as to face the image holding member and rotates so as to move in the same direction as the image holding member moves at a second facing portion. A value obtained by dividing an amount of developer per unit area held on the first developer holder by a shortest distance between the image holding member and the first developer holder is approximately in a range from 1.00×103 kg/m3 to 1.60×103 kg/m3.Type: GrantFiled: June 4, 2013Date of Patent: January 26, 2016Assignee: FUJI XEROX CO., LTD.Inventors: Kunihiko Sato, Yoko Miyamoto, Yoshiya Mashimo, Masaaki Takahashi, Sakon Takahashi, Nobumasa Furuya, Kazuhiko Arai
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Publication number: 20150370194Abstract: Provided is an image forming apparatus including an image forming unit that forms an image on a recording medium, and an applying unit that causes powder included in a liquid mixture to be interposed between the recording medium and the image forming unit by applying the liquid mixture to the recording medium, or to the image forming unit which comes into contact with the recording medium, wherein the recording medium includes an image forming layer, an adhesive layer, and a base layer, and the liquid mixture includes the powder reducing adhesion of the adhesive layer and volatile liquid.Type: ApplicationFiled: October 10, 2014Publication date: December 24, 2015Inventors: Yutaka KIUCHI, Masayo HIGASHIMURA, Kazuhiko ARAI
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Patent number: 9195167Abstract: An image forming apparatus includes a toner image holding member, a transfer unit, and a supply unit. The toner image holding member holds a toner image. The transfer unit transfers the toner image held by the toner image holding member to a recording medium. The supply unit supplies powder such that the powder is interposed between an end portion of the recording medium and the toner image holding member and/or the transfer unit if the recording medium includes an intermediate adhesive layer.Type: GrantFiled: November 18, 2014Date of Patent: November 24, 2015Assignee: FUJI XEROX CO., LTD.Inventors: Yutaka Kiuchi, Sakon Takahashi, Masayo Higashimura, Atsumi Kurita, Kunihiko Sato, Kosuke Yamada, Kazuhiko Arai
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Publication number: 20150071671Abstract: An image forming apparatus includes an image forming unit and a controller. The image forming unit forms an image on a continuous recording medium by transferring to the continuous recording medium a toner image obtained by developing a latent image formed on a photoreceptor. The controller controls the image forming unit such that an image based on image information is formed in a specific image area on the continuous recording medium, and at the same time, a specific image pattern is formed in a specific side area outside the image area on the continuous recording medium.Type: ApplicationFiled: March 10, 2014Publication date: March 12, 2015Applicant: FUJI XEROX CO., LTDInventors: Yutaka KIUCHI, Kazuhiko ARAI, Kunihiko SATO, Sakon TAKAHASHI, Masayo HIGASHIMURA, Kosuke YAMADA, Atsumi KURITA, Daisuke NAKAI
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Publication number: 20150072112Abstract: An image forming apparatus includes a toner image holding member, a transfer unit, and a supply unit. The toner image holding member holds a toner image. The transfer unit transfers the toner image held by the toner image holding member to a recording medium. The supply unit supplies powder such that the powder is interposed between an end portion of the recording medium and the toner image holding member and/or the transfer unit if the recording medium includes an intermediate adhesive layer.Type: ApplicationFiled: November 18, 2014Publication date: March 12, 2015Applicant: FUJI XEROX CO., LTD.Inventors: Yutaka KIUCHI, Sakon TAKAHASHI, Masayo HIGASHIMURA, Atsumi KURITA, Kunihiko SATO, Kosuke YAMADA, Kazuhiko ARAI
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Patent number: 8942587Abstract: An electrostatic image developer includes a toner containing an external additive having a volume-average particle size of about 80 to 400 nm and an average circularity of about 0.7 to 0.85. The developer is used in an image forming apparatus including an image-carrying member having a top surface layer containing fluorocarbon resin particles, and a developer-carrying member that faces the image-carrying member and carries an electrostatic image developer, in which a value obtained by dividing the amount of developer on the developer-carrying member [g/m2] by a shortest distance between the image-carrying member and the developer-carrying member [?m] is about 0.8 to 1.8, and a peripheral velocity ratio of the developer-carrying member to the image-carrying member is about 1.5 to 5.0 or the developer-carrying member moves in a direction opposite to the image-carrying member in a facing portion.Type: GrantFiled: June 7, 2013Date of Patent: January 27, 2015Assignee: Fuji Xerox Co., Ltd.Inventors: Sakon Takahashi, Akihiro Iizuka, Motoko Sakai, Kunihiko Sato, Kazuhiko Arai, Nobumasa Furuya, Masaaki Takahashi, Daisuke Haruyama, Koji Nishimura
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Publication number: 20150003851Abstract: An image forming apparatus includes a toner image holding member, a transfer unit, and a supply unit. The toner image holding member holds a toner image. The transfer unit transfers the toner image held by the toner image holding member to a recording medium. The supply unit supplies powder such that the powder is interposed between an end portion of the recording medium and the toner image holding member and/or the transfer unit if the recording medium includes an intermediate adhesive layer.Type: ApplicationFiled: November 5, 2013Publication date: January 1, 2015Applicant: FUJI XEROX CO., LTD.Inventors: Yutaka KIUCHI, Sakon TAKAHASHI, Masayo HIGASHIMURA, Atsumi KURITA, Kunihiko SATO, Kosuke YAMADA, Kazuhiko ARAI
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Patent number: 8923712Abstract: An image forming apparatus includes a toner image holding member, a transfer unit, and a supply unit. The toner image holding member holds a toner image. The transfer unit transfers the toner image held by the toner image holding member to a recording medium. The supply unit supplies powder such that the powder is interposed between an end portion of the recording medium and the toner image holding member and/or the transfer unit if the recording medium includes an intermediate adhesive layer.Type: GrantFiled: November 5, 2013Date of Patent: December 30, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Yutaka Kiuchi, Sakon Takahashi, Masayo Higashimura, Atsumi Kurita, Kunihiko Sato, Kosuke Yamada, Kazuhiko Arai
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Patent number: 8913916Abstract: A developer contains a toner having an external additive deposited thereon. The developer is used with an image-forming apparatus including an image carrier including a surface layer in which fluoropolymer resin particles are dispersed and a cleaning member disposed in contact with an outer surface of the image carrier. The external additive is a nonspherical external additive whose volume average particle size is smaller than the average particle size of exposed portions of the fluoropolymer resin particles in the surface layer of the image carrier.Type: GrantFiled: May 14, 2013Date of Patent: December 16, 2014Assignee: Fuji Xerox Co., Ltd.Inventors: Shinichi Kawamata, Kunihiko Sato, Sakon Takahashi, Nobumasa Furuya, Kazuhiko Arai, Masaaki Takahashi, Koji Nishimura, Daisuke Haruyama