Patents by Inventor Shogo Kan
Shogo Kan 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: 9952538Abstract: An image forming apparatus includes a fixing unit including a roller, a heating rotary member heating the roller, and a backup member forming a nip portion, a temperature detection unit detecting a temperature of the heating rotary member, and a control unit for controlling power so that the detected temperature is maintained at a target temperature, wherein a print job includes a first step in which the unfixed toner image is formed on the recording material, a second step in which fixing processing is executed, and a third step in which the fixing unit is cleaned, and wherein the third step is executed following the second step, and in the third step, while the target temperature is set higher than the target temperature in the second step, the roller and the heating rotary member are rotated in a state where no recording material is present at the nip portion.Type: GrantFiled: April 5, 2016Date of Patent: April 24, 2018Assignee: Canon Kabushiki KaishaInventors: Satoshi Nishida, Isamu Takeda, Akimichi Suzuki, Shogo Kan, Kazuhiro Doda, Takanori Mitani
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Publication number: 20160299460Abstract: An image forming apparatus includes a fixing unit including a roller, a heating rotary member heating the roller, and a backup member forming a nip portion, a temperature detection unit detecting a temperature of the heating rotary member, and a control unit for controlling power so that the detected temperature is maintained at a target temperature, wherein a print job includes a first step in which the unfixed toner image is formed on the recording material, a second step in which fixing processing is executed, and a third step in which the fixing unit is cleaned, and wherein the third step is executed following the second step, and in the third step, while the target temperature is set higher than the target temperature in the second step, the roller and the heating rotary member are rotated in a state where no recording material is present at the nip portion.Type: ApplicationFiled: April 5, 2016Publication date: October 13, 2016Inventors: Satoshi Nishida, Isamu Takeda, Akimichi Suzuki, Shogo Kan, Kazuhiro Doda, Takanori Mitani
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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
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Patent number: 9195187Abstract: An image forming apparatus configured to form a toner image on a recording material, includes: an image forming unit configured to form a unfixed toner image on the recording material; a fixing unit configured to heat the recording material where the unfixed toner image is formed while conveying the recording material using a nip portion, and to fix the unfixed toner image on the recording material; and a control unit configured to perform control so that temperature of the fixing unit is maintained in target temperature, with the target temperature (Tn) of a n'th page in consecutive printing being set to the highest temperature of the target temperatures (Tn to Tn+k) according to each of image densities (Dn to Dn+k) at (n to (n+k))'th pages, where integer k?1.Type: GrantFiled: November 27, 2013Date of Patent: November 24, 2015Assignee: Canon Kabushiki KaishaInventors: Shogo Kan, Akimichi Suzuki, Satoshi Nishida, Hideo Nanataki, Takanori Mitani
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Patent number: 9110417Abstract: A fixing apparatus includes a roller, a first unit configured to heat the roller, the first unit including a first tubular film, a heating portion forming member to form a heating portion with the roller, and a first guide member dotted with first protruding portions contacting the inner surface of the first tubular film, and a second unit configured to form a nip portion with the roller, the second unit including a second tubular film, a nip portion forming member to form the nip portion with the roller, and a second guide member dotted with second protruding portions contacting the inner surface of the second tubular film, wherein there is a non-overlapping area between the first protruding portions and the second protruding portions in a generatrix direction of the roller.Type: GrantFiled: March 15, 2013Date of Patent: August 18, 2015Assignee: Canon Kabushiki KaishaInventors: Takanori Mitani, Satoshi Nishida, Hideo Nanataki, Shogo Kan, Takeshi Shinji
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Patent number: 9042800Abstract: A fixing device configured to fix a toner image on a recording material by heating while conveying the recording material that bears the toner image by a nip portion, the fixing device includes a fixing roller having a rubber layer, a rotating member configured to form a contact portion between the rotating member and the fixing roller, and a pressure member configured to form the nip portion cooperatively with the fixing roller. In the fixing device, heat of the rotating member transfers to the fixing roller from the rotating member via the contact portion, and the contact portion includes a region where the pressure is increased after being decreased on a downstream side further than a center of the contact portion in the rotational direction of the rotating member.Type: GrantFiled: June 26, 2013Date of Patent: May 26, 2015Assignee: Canon Kabushiki KaishaInventors: Satoshi Nishida, Hideo Nanataki, Takanori Mitani, Shogo Kan, Takeshi Shinji, Kohei Okayasu, Masafumi Maeda
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Publication number: 20140314458Abstract: 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: April 15, 2014Publication date: October 23, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Takanori Mitani, Satoshi Nishida, Hideo Nanataki, Akimichi Suzuki, Shogo Kan, Kensuke Umeda, Takaaki Akamatsu
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Publication number: 20140314437Abstract: 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: ApplicationFiled: April 16, 2014Publication date: October 23, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Satoshi Nishida, Takanori Mitani, Akimichi Suzuki, Hideo Nanataki, Shogo Kan
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Patent number: 8831493Abstract: An image heating apparatus for heating a toner image formed on a recording material includes a first rotatable member contactable to the toner image; and a heating unit, including a second rotatable member rotating while contacting a surface of the first rotatable member, for heating the first rotatable member. The toner image on the recording material is heated by receiving heat from the first rotatable member heated by the heating unit. The image heating apparatus further includes a potential controller for maintaining a polarity of a surface potential of the second rotatable member so as to be opposite to a charge polarity of the toner.Type: GrantFiled: December 14, 2011Date of Patent: September 9, 2014Assignee: Canon Kabushiki KaishaInventors: Masashi Tanaka, Kenichi Ogawa, Satoshi Nishida, Kohei Okayasu, Shuichi Tetsuno, Shogo Kan, Takaaki Akamatsu
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Publication number: 20140153950Abstract: An image forming apparatus configured to form a toner image on a recording material, includes: an image forming unit configured to form a unfixed toner image on the recording material; a fixing unit configured to heat the recording material where the unfixed toner image is formed while conveying the recording material using a nip portion, and to fix the unfixed toner image on the recording material; and a control unit configured to perform control so that temperature of the fixing unit is maintained in target temperature, with the target temperature (Tn) of a n'th page in consecutive printing being set to the highest temperature of the target temperatures (Tn to Tn+k) according to each of image densities (Dn to Dn+k) at (n to (n+k))'th pages, where integer k21.Type: ApplicationFiled: November 27, 2013Publication date: June 5, 2014Applicant: Canon Kabushiki KaishaInventors: Shogo Kan, Akimichi Suzuki, Satoshi Nishida, Hideo Nanataki, Takanori Mitani
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Publication number: 20140023413Abstract: The image heating apparatus, for heating a toner image while conveying a recording material bearing the toner image at a nip portion, includes a rotary member in contact with the toner image, an endless belt, and a nip portion forming member that is in contact with the inner surface of the belt and forms the nip portion together with the rotary member via the belt. The nip portion forming member is a metal member having a surface which is in contact with the inner surface of the belt and on which an oxide layer is formed by an alumite treatment.Type: ApplicationFiled: July 17, 2013Publication date: January 23, 2014Inventors: Takeshi Shinji, Satoshi Nishida, Takanori Mitani, Shogo Kan
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Publication number: 20140003847Abstract: A fixing device configured to fix a toner image on a recording material by heating while conveying the recording material that bears the toner image by a nip portion, the fixing device includes a fixing roller having a rubber layer, a rotating member configured to form a contact portion between the rotating member and the fixing roller, and a pressure member configured to form the nip portion cooperatively with the fixing roller. In the fixing device, heat of the rotating member transfers to the fixing roller from the rotating member via the contact portion, and the contact portion includes a region where the pressure is increased after being decreased on a downstream side further than a center of the contact portion in the rotational direction of the rotating member.Type: ApplicationFiled: June 26, 2013Publication date: January 2, 2014Inventors: Satoshi Nishida, Hideo Nanataki, Takanori Mitani, Shogo Kan, Takeshi Shinji, Kohei Okayasu, Masafumi Maeda
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Publication number: 20130251424Abstract: A fixing apparatus includes a roller, a first unit configured to heat the roller, the first unit including a first tubular film, a heating portion forming member to form a heating portion with the roller, and a first guide member dotted with first protruding portions contacting the inner surface of the first tubular film, and a second unit configured to form a nip portion with the roller, the second unit including a second tubular film, a nip portion forming member to form the nip portion with the roller, and a second guide member dotted with second protruding portions contacting the inner surface of the second tubular film, wherein there is a non-overlapping area between the first protruding portions and the second protruding portions in a generatrix direction of the roller.Type: ApplicationFiled: March 15, 2013Publication date: September 26, 2013Applicant: CANON KABUSHIKI KAISHAInventors: Takanori Mitani, Satoshi Nishida, Hideo Nanataki, Shogo Kan, Takeshi Shinji
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Patent number: 8532551Abstract: An image forming apparatus is capable of setting a cleaning mode in which a fixing portion is cleaned by a cleaning sheet while nip-conveying the cleaning sheet in a fixing nip. When the cleaning mode is set, an image forming apparatus provides a period in which a first rotatable member and a second rotatable member are rotated in a state in which a heater is controlled so that a surface temperature Th of the first rotatable member immediately after passing through the fixing nip is kept within a temperature range of Th?Tf3, wherein Tf3 is a flow start point of a toner and so that a surface temperature Tp of the second rotatable member immediately after passing through the fixing nip is within a temperature range Tf2?Tp?Tf3, wherein Tf2 is a deformation end point of the toner.Type: GrantFiled: April 26, 2011Date of Patent: September 10, 2013Assignee: Canon Kabushiki KaishaInventors: Shuichi Tetsuno, Kenichi Ogawa, Masashi Tanaka, Takaaki Akamatsu, Shogo Kan
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Patent number: 8532530Abstract: A fixing device fixes on a recording material a toner image formed on the recording material and includes a fixing roller, a heating member for heating the fixing roller in contact with an outer surface of the fixing roller, and a pressing member for forming a fixing nip between itself and the fixing roller. When the recording material which has been jammed so that its leading end passes through the fixing nip to reach a contact portion between the heating member and the fixing roller, a force for drawing the recording material upstream when nipped in the fixing nip is at least equal to the drawing force of the recording material, toward the upstream side with respect to the rotational direction of the fixing roller, nipped between the fixing roller in the rest state and the heating member.Type: GrantFiled: March 22, 2011Date of Patent: September 10, 2013Assignee: Canon Kabushiki KaishaInventors: Satoshi Nishida, Kenichi Ogawa, Masashi Tanaka, Shuichi Tetsuno, Shogo Kan
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Patent number: 8472853Abstract: An image forming apparatus includes an image forming portion for forming an unfixed toner image on a recording material; and a fixing portion for heat-fixing the unfixed toner image on the recording material while nip-conveying the recording material in a fixing nip, the fixing portion includes a first rotatable member contactable to the unfixed toner image, and a second rotatable member contacted to the first rotatable member to form the fixing nip between itself and the first rotatable member. The image forming apparatus is capable of setting a cleaning mode in which the fixing portion is cleaned by a cleaning sheet while nip-conveying the cleaning sheet in the fixing nip. When the cleaning mode is set, the image forming apparatus executes a plurality of types of cleaning operations in a period in which a single cleaning sheet passes through the fixing nip.Type: GrantFiled: April 26, 2011Date of Patent: June 25, 2013Assignee: Canon Kabushiki KaishaInventors: Takaaki Akamatsu, Shuichi Tetsuno, Masashi Tanaka, Shogo Kan, Kenichi Ogawa
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Publication number: 20120155938Abstract: An image heating apparatus for heating a toner image formed on a recording material includes a first rotatable member contactable to the toner image; and a heating unit, including a second rotatable member rotating while contacting a surface of the first rotatable member, for heating the first rotatable member. The toner image on the recording material is heated by receiving heat from the first rotatable member heated by the heating unit. The image heating apparatus further includes a potential controller for maintaining a polarity of a surface potential of the second rotatable member so as to be opposite to a charge polarity of the toner.Type: ApplicationFiled: December 14, 2011Publication date: June 21, 2012Applicant: CANON KABUSHIKI KAISHAInventors: MASASHI TANAKA, Kenichi Ogawa, Satoshi Nishida, Kohei Okayasu, Shuichi Tetsuno, Shogo Kan, Takaaki Akamatsu