Patents by Inventor Hideo Nanataki
Hideo Nanataki 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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Publication number: 20240384196Abstract: A grease composition for heat fixing devices contains a base oil and polytetrafluoroethylene. The base oil contains a perfluoropolyether having at least one of the structures represented by formulas (I) and (II) in the molecule and has a kinematic viscosity v40 of 800 mm2/s to 2500 mm2/s at 40° C., and whose kinematic viscosity v200 at 200° C. is 1/50 or less of the kinematic viscosity v40.Type: ApplicationFiled: May 9, 2024Publication date: November 21, 2024Inventors: MUNEHITO KURATA, HISASHI NAKAHARA, HIROHIKO AIBA, DAISUKE SATO, HIDEO NANATAKI, MASAHITO OMATA, HIROYUKI SAKAKIBARA, TAKAAKI AKAMATSU, YOSHIHITO OSHIMA, KOICHI SUGAWARA
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Publication number: 20230303944Abstract: A heating device including: a rotating member for heating, an opposing member, which is arranged so as to be opposed to the rotating member, and forms a nip portion together with the rotating member, and a biasing member, which is arranged inside the rotating member, has an opposing surface with respect to an inner peripheral surface of the rotating member, and biases the rotating member to the opposing member. The inner peripheral surface and the opposing surface are brought into contact with each other via a grease composition to form a sliding portion. The grease composition contains a base oil. The base oil contains a fluoropolymer having a specific structure and a perfluoropolyether having a specific kinematic viscosity and a specific evaporation loss and having a specific structure.Type: ApplicationFiled: March 21, 2023Publication date: September 28, 2023Inventors: MASAHITO OMATA, HIDEO NANATAKI, YASUHARU NOTOYA, NORIHIKO OCHI, FUYUKO KOYAMA, YOSHIHITO OSHIMA
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Patent number: 11112735Abstract: A controller can select and execute a full color mode of performing image formation in a first state in which each primary transfer member is in contact with an intermediate transfer belt, and a monochrome mode of performing image formation in a second state in which only a primary transfer member is in contact with the intermediate transfer belt. The controller determines which state of the first state and the second state is formed, based on a detection result obtained by a current detection circuit when a photosensitive drum is charged by a charging roller, and voltage is applied to the primary transfer member from a primary transfer power source.Type: GrantFiled: December 13, 2019Date of Patent: September 7, 2021Assignee: Canon Kabushiki KaishaInventors: Taro Minobe, Keizo Kojima, Naoki Kanno, Atsushi Nakamoto, Toshihiko Takayama, Hideo Nanataki
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Patent number: 10948844Abstract: A controller which causes a light emitting element to continuously perform minute emission for a plurality of dots in a level in which toner is not attached to a non-image section on an image bearing member is provided. The controller controls a first driving current for an image section and controls a second driving current used to perform the minute emission by the light emitting element in the non-image section several times in one job. In the image section, a driving current obtained by adding the first driving current to the second driving current is supplied so that the light emitting element emits light.Type: GrantFiled: June 19, 2019Date of Patent: March 16, 2021Assignee: CANON KABUSHIKI KAISHAInventors: Kiyoto Toyoizumi, Masaru Shimura, Shinsuke Kobayashi, Hideo Nanataki, Shinji Katagiri, Yasunari Watanabe, Hideaki Hasegawa, Masahiro Tambo
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Patent number: 10809655Abstract: An image forming apparatus includes: an image bearing member; a developer carrying member to correspond to the image bearing member; drive portion to rotationally drive the developer carrying member; control unit to control the rotational drive by the drive portion, and detection portion to detect information from the toner patch. Modes for controlling, by control unit, the rotational drive of the drive portion include (i) a first mode which uses a first driving condition including a first peripheral speed ratio between the developer carrying member and the image bearing member and (ii) a second mode which uses a second driving condition including a second peripheral speed ratio which is higher than the first peripheral speed ratio. The control unit controls the image bearing member to form the toner patch for each of peripheral speed ratios and sets the second driving condition on the basis of the detected information.Type: GrantFiled: September 10, 2019Date of Patent: October 20, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Takao Kume, Toshihiko Takayama, Hideo Nanataki
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Publication number: 20200201212Abstract: A controller can select and execute a full color mode of performing image formation in a first state in which each primary transfer member is in contact with an intermediate transfer belt, and a monochrome mode of performing image formation in a second state in which only a primary transfer member is in contact with the intermediate transfer belt. The controller determines which state of the first state and the second state is formed, based on a detection result obtained by a current detection circuit when a photosensitive drum is charged by a charging roller, and voltage is applied to the primary transfer member from a primary transfer power source.Type: ApplicationFiled: December 13, 2019Publication date: June 25, 2020Inventors: Taro Minobe, Keizo Kojima, Naoki Kanno, Atsushi Nakamoto, Toshihiko Takayama, Hideo Nanataki
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Publication number: 20200089152Abstract: An image forming apparatus includes: an image bearing member; a developer carrying member to correspond to the image bearing member; drive portion to rotationally drive the developer carrying member; control unit to control the rotational drive by the drive portion, and detection portion to detect information from the toner patch. Modes for controlling, by control unit, the rotational drive of the drive portion include (i) a first mode which uses a first driving condition including a first peripheral speed ratio between the developer carrying member and the image bearing member and (ii) a second mode which uses a second driving condition including a second peripheral speed ratio which is higher than the first peripheral speed ratio. The control unit controls the image bearing member to form the toner patch for each of peripheral speed ratios and sets the second driving condition on the basis of the detected information.Type: ApplicationFiled: September 10, 2019Publication date: March 19, 2020Inventors: Takao Kume, Toshihiko Takayama, Hideo Nanataki
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Publication number: 20190302639Abstract: A controller which causes a light emitting element to continuously perform minute emission for a plurality of dots in a level in which toner is not attached to a non-image section on an image bearing member is provided. The controller controls a first driving current for an image section and controls a second driving current used to perform the minute emission by the light emitting element in the non-image section several times in one job. In the image section, a driving current obtained by adding the first driving current to the second driving current is supplied so that the light emitting element emits light.Type: ApplicationFiled: June 19, 2019Publication date: October 3, 2019Inventors: Kiyoto Toyoizumi, Masaru Shimura, Shinsuke Kobayashi, Hideo Nanataki, Shinji Katagiri, Yasunari Watanabe, Hideaki Hasegawa, Masahiro Tambo
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Patent number: 10372058Abstract: A controller which causes a light emitting element to continuously perform minute emission for a plurality of dots in a level in which toner is not attached to a non-image section on an image bearing member is provided. The controller controls a first driving current for an image section and controls a second driving current used to perform the minute emission by the light emitting element in the non-image section several times in one job. In the image section, a driving current obtained by adding the first driving current to the second driving current is supplied so that the light emitting element emits light.Type: GrantFiled: August 4, 2017Date of Patent: August 6, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Kiyoto Toyoizumi, Masaru Shimura, Shinsuke Kobayashi, Hideo Nanataki, Shinji Katagiri, Yasunari Watanabe, Hideaki Hasegawa, Masahiro Tambo
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Patent number: 10133220Abstract: A fixing apparatus for fixing an image onto recording material, includes a heating rotary member, film of a cylindrical shape, and pressure member configured to press the film from inside the film toward the heating rotary member to form a nip portion as an area where the heating rotary member and film contact. The pressure member includes a metallic member extending from an upstream side of a center in a recording material conveyance direction of the nip portion to a downstream side, wherein the recording material on which the image is formed is conveyed while being heated at the nip portion to fix the image onto the recording material. A center of gravity of the metallic member is on the upstream side of the center in the recording material conveyance direction of the nip portion in a cross-section perpendicular to a rotation axis direction of the heating rotary member.Type: GrantFiled: July 12, 2017Date of Patent: November 20, 2018Assignee: Canon Kabushiki KaishaInventors: Atsushi Nakamoto, Satoshi Nishida, Isamu Takeda, Hideo Nanataki, Akimichi Suzuki
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Publication number: 20180024482Abstract: A fixing apparatus for fixing an image onto recording material, includes a heating rotary member, film of a cylindrical shape, and pressure member configured to press the film from inside the film toward the heating rotary member to form a nip portion as an area where the heating rotary member and film contact. The pressure member includes a metallic member extending from an upstream side of a center in a recording material conveyance direction of the nip portion to a downstream side, wherein the recording material on which the image is formed is conveyed while being heated at the nip portion to fix the image onto the recording material. A center of gravity of the metallic member is on the upstream side of the center in the recording material conveyance direction of the nip portion in a cross-section perpendicular to a rotation axis direction of the heating rotary member.Type: ApplicationFiled: July 12, 2017Publication date: January 25, 2018Inventors: Atsushi Nakamoto, Satoshi Nishida, Isamu Takeda, Hideo Nanataki, Akimichi Suzuki
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Publication number: 20170357175Abstract: A controller which causes a light emitting element to continuously perform minute emission for a plurality of dots in a level in which toner is not attached to a non-image section on an image bearing member is provided. The controller controls a first driving current for an image section and controls a second driving current used to perform the minute emission by the light emitting element in the non-image section several times in one job. In the image section, a driving current obtained by adding the first driving current to the second driving current is supplied so that the light emitting element emits light.Type: ApplicationFiled: August 4, 2017Publication date: December 14, 2017Inventors: Kiyoto Toyoizumi, Masaru Shimura, Shinsuke Kobayashi, Hideo Nanataki, Shinji Katagiri, Yasunari Watanabe, Hideaki Hasegawa, Masahiro Tambo
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Patent number: 9753418Abstract: A fixing apparatus includes a roller, a heating rotation member configured to form a pressure portion by coming into contact with the roller, the heating rotation member being rotated by rotation of the roller, and a pressing rotation member configured to form a nip portion by coming into contact with the roller, the pressing rotation member being rotated by the rotation of the roller, wherein micro-hardness of a surface of the heating rotation member at the pressure portion and micro-hardness of a surface of the pressing rotation member at the nip portion are both higher than micro-hardness of a surface of the roller, and wherein frictional force acting on the roller at the pressure portion is larger than frictional force acting on the roller at the nip portion.Type: GrantFiled: May 25, 2016Date of Patent: September 5, 2017Assignee: Canon Kabushiki KaishaInventors: Isamu Takeda, Takanori Mitani, Akimichi Suzuki, Satoshi Nishida, Hideo Nanataki, Kazuhiro Doda, Yasuhito Minamishima
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Patent number: 9720362Abstract: An image forming apparatus for forming a toner image on a recording material, the apparatus includes a cylindrical film; a plate-like nip forming member contacted with an inner surface of the film, the nip forming member including a base member and a coating layer on the base member, the coating layer having a thermal expansion coefficient smaller than that of the base member; and a roller cooperative with the nip forming member to form a nip, wherein the coating layer is provided on a first surface of the nip forming member which is opposed to the film and on a second surface opposite from the first surface except for an outer edge portion of the nip forming member.Type: GrantFiled: May 20, 2016Date of Patent: August 1, 2017Assignee: Canon Kabushiki KaishaInventors: Yasuhito Minamishima, Satoshi Nishida, Isamu Takeda, Takanori Mitani, Kazuhiro Doda, Hideo Nanataki, Akimichi Suzuki
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Publication number: 20160349682Abstract: A fixing apparatus includes a roller, a heating rotation member configured to form a pressure portion by coming into contact with the roller, the heating rotation member being rotated by rotation of the roller, and a pressing rotation member configured to form a nip portion by coming into contact with the roller, the pressing rotation member being rotated by the rotation of the roller, wherein micro-hardness of a surface of the heating rotation member at the pressure portion and micro-hardness of a surface of the pressing rotation member at the nip portion are both higher than micro-hardness of a surface of the roller, and wherein frictional force acting on the roller at the pressure portion is larger than frictional force acting on the roller at the nip portion.Type: ApplicationFiled: May 25, 2016Publication date: December 1, 2016Inventors: Isamu Takeda, Takanori Mitani, Akimichi Suzuki, Satoshi Nishida, Hideo Nanataki, Kazuhiro Doda, Yasuhito Minamishima
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Publication number: 20160342117Abstract: An image forming apparatus for forming a toner image on a recording material, the apparatus includes a cylindrical film; a plate-like nip forming member contacted with an inner surface of the film, the nip forming member including a base member and a coating layer on the base member, the coating layer having a thermal expansion coefficient smaller than that of the base member; and a roller cooperative with the nip forming member to form a nip, wherein the coating layer is provided on a first surface of the nip forming member which is opposed to the film and on a second surface opposite from the first surface except for an outer edge portion of the nip forming member.Type: ApplicationFiled: May 20, 2016Publication date: November 24, 2016Inventors: Yasuhito Minamishima, Satoshi Nishida, Isamu Takeda, Takanori Mitani, Kazuhiro Doda, Hideo Nanataki, Akimichi Suzuki
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Patent number: 9335688Abstract: An image forming apparatus includes an image forming portion; and a fixing portion. The fixing portion includes a cylindrical film, a nip-forming member and a roller including a shaft portion and an elastic layer. The elastic layer contacts an outer surface of the film except an end region of the film with respect to a generatrix direction. In the end region, the shaft portion and the outer surface of the film oppose each other with a spatial region with respect to a radial direction of the shaft portion. The image forming apparatus includes a spacer occupying at least a part of the spatial region.Type: GrantFiled: October 26, 2015Date of Patent: May 10, 2016Assignee: Canon Kabushiki KaishaInventors: Takanori Mitani, Satoshi Nishida, Hideo Nanataki, Akimichi Suzuki, Shogo Kan, Kensuke Umeda, Takaaki Akamatsu
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Publication number: 20160054689Abstract: An image forming apparatus includes an image forming portion; and a fixing portion. The fixing portion includes a cylindrical film, a nip-forming member and a roller including a shaft portion and an elastic layer. The elastic layer contacts an outer surface of the film except an end region of the film with respect to a generatrix direction. In the end region, the shaft portion and the outer surface of the film oppose each other with a spatial region with respect to a radial direction of the shaft portion. The image forming apparatus includes a spacer occupying at least a part of the spatial region.Type: ApplicationFiled: October 26, 2015Publication date: February 25, 2016Inventors: Takanori Mitani, Satoshi Nishida, Hideo Nanataki, Akimichi Suzuki, Shogo Kan, Kensuke Umeda, Takaaki Akamatsu
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Patent number: 9213276Abstract: An image forming apparatus includes an image forming portion; and a fixing portion. The fixing portion includes a cylindrical film, a nip-forming member and a roller including a shaft portion and an elastic layer. The elastic layer contacts an outer surface of the film except an end region of the film with respect to a generatrix direction. In the end region, the shaft portion and the outer surface of the film oppose each other with a spatial region with respect to a radial direction of the shaft portion. The image forming apparatus includes a spacer occupying at least a part of the spatial region.Type: GrantFiled: April 15, 2014Date of Patent: December 15, 2015Assignee: Canon Kabushiki KaishaInventors: Takanori Mitani, Satoshi Nishida, Hideo Nanataki, Akimichi Suzuki, Shogo Kan, Kensuke Umeda, Takaaki Akamatsu
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Patent number: 9207588Abstract: An image forming apparatus includes: an image forming portion; a fixing portion; a first air blowing portion; and a second air blowing portion. The apparatus is operable in a first air blowing mode in which both the first and second air blowing portions are driven and in which the direction of the air near the exit is the recording material feeding direction, and is operable in a second air blowing mode in which both the first and second air blowing portions are driven and in which a direction of the air near the exit is a recording material feeding direction and a speed of the air is lower than a speed of the air in the first air blowing mode or in which the direction of the air near the exit is the opposite direction to the recording material feeding direction.Type: GrantFiled: April 16, 2014Date of Patent: December 8, 2015Assignee: Canon Kabushiki KaishaInventors: Satoshi Nishida, Takanori Mitani, Akimichi Suzuki, Hideo Nanataki, Shogo Kan