Patents by Inventor Shuuichi Tetsuno
Shuuichi Tetsuno 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: 20140219692Abstract: An image forming apparatus includes: an image bearing member for bearing a toner image; a belt for conveying the toner image; and a transfer device for rubbing the belt, and a surface of the transfer device, which is brought into contact with the belt includes linear concave portions or linear convex portions. The image forming apparatus of the present invention prevents a friction force between the belt and the transfer device rubbing the belt from increasing and brings a transfer member into a stable contact with the belt for conveying the toner image, thereby suppressing increase in drive torque of the belt which rubs the transfer device and suppressing occurrence of image failure.Type: ApplicationFiled: April 18, 2014Publication date: August 7, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Kazuhiro Doda, Masaru Shimura, Shigeru Hoashi, Kenji Kanari, Seiji Saito, Takashi Shimada, Takaaki Akamatsu, Michio Uchida, Ken Nakagawa, Takamitsu Soda, Shuuichi Tetsuno
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Patent number: 8750772Abstract: An image forming apparatus includes: an image bearing member for bearing a toner image; a belt for conveying the toner image; and a transfer device for rubbing the belt, and a surface of the transfer device, which is brought into contact with the belt includes linear concave portions or linear convex portions. The image forming apparatus of the present invention prevents a friction force between the belt and the transfer device rubbing the belt from increasing and brings a transfer member into a stable contact with the belt for conveying the toner image, thereby suppressing increase in drive torque of the belt which rubs the transfer device and suppressing occurrence of image failure.Type: GrantFiled: June 26, 2012Date of Patent: June 10, 2014Assignee: Canon Kabushiki KaishaInventors: Kazuhiro Doda, Masaru Shimura, Shigeru Hoashi, Kenji Kanari, Seiji Saito, Takashi Shimada, Takaaki Akamatsu, Michio Uchida, Ken Nakagawa, Takamitsu Soda, Shuuichi Tetsuno
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Publication number: 20140105643Abstract: An image forming apparatus includes an image bearing member for carrying a toner image, a movable intermediary transfer member for receiving the toner image from the image bearing member, a primary transfer member for primary transfer of the toner image from the image bearing member onto the intermediary transfer member, a secondary transfer member for being supplied with a voltage and for secondary transfer of the toner image from the intermediary transfer member onto a transfer material, and a first toner charging member. A first charging member rubs a surface of the intermediary transfer member with movement thereof, and a second charging member moves in contact with the intermediary transfer member, thereby transferring toner remaining on the intermediary transfer member after the secondary transfer back to the image bearing member from the intermediary transfer member simultaneously with the primary transfer at the primary transfer station.Type: ApplicationFiled: October 11, 2013Publication date: April 17, 2014Inventors: Seiji Saito, Takuma Abe, Masaru Shimura, Ken Nakagawa, Kenji Kanari, Takamitsu Soda, Takaaki Akamatsu, Kazuhiro Doda, Takashi Shimada, Shuuichi Tetsuno
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Publication number: 20120269557Abstract: An image forming apparatus includes: an image bearing member for bearing a toner image; a belt for conveying the toner image; and a transfer device for rubbing the belt, and a surface of the transfer device, which is brought into contact with the belt includes linear concave portions or linear convex portions. The image forming apparatus of the present invention prevents a friction force between the belt and the transfer device rubbing the belt from increasing and brings a transfer member into a stable contact with the belt for conveying the toner image, thereby suppressing increase in drive torque of the belt which rubs the transfer device and suppressing occurrence of image failure.Type: ApplicationFiled: June 26, 2012Publication date: October 25, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Kazuhiro DODA, Masaru SHIMURA, Shigeru HOASHI, Kenji KANARI, Seiji SAITO, Takashi SHIMADA, Takaaki AKAMATSU, Michio UCHIDA, Ken NAKAGAWA, Takamitsu SODA, Shuuichi TETSUNO
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Patent number: 8238807Abstract: An image forming apparatus includes: an image bearing member for bearing a toner image; a belt for conveying the toner image; and a transfer device for rubbing the belt, and a surface of the transfer device, which is brought into contact with the belt includes linear concave portions or linear convex portions. The image forming apparatus of the present invention prevents a friction force between the belt and the transfer device rubbing the belt from increasing and brings a transfer member into a stable contact with the belt for conveying the toner image, thereby suppressing increase in drive torque of the belt which rubs the transfer device and suppressing occurrence of image failure.Type: GrantFiled: December 16, 2011Date of Patent: August 7, 2012Assignee: Canon Kabushiki KaishaInventors: Kazuhiro Doda, Masaru Shimura, Shigeru Hoashi, Kenji Kanari, Seiji Saito, Takashi Shimada, Takaaki Akamatsu, Michio Uchida, Ken Nakagawa, Takamitsu Soda, Shuuichi Tetsuno
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Patent number: 8165512Abstract: An image forming apparatus includes: an image bearing member for bearing a toner image; a belt for conveying the toner image; and a transfer device for rubbing the belt, and a surface of the transfer device, which is brought into contact with the belt includes linear concave portions or linear convex portions. The image forming apparatus of the present invention prevents a friction force between the belt and the transfer device rubbing the belt from increasing and brings a transfer member into a stable contact with the belt for conveying the toner image, thereby suppressing increase in drive torque of the belt which rubs the transfer device and suppressing occurrence of image failure.Type: GrantFiled: April 16, 2009Date of Patent: April 24, 2012Assignee: Canon Kabushiki KaishaInventors: Kazuhiro Doda, Masaru Shimura, Shigeru Hoashi, Kenji Kanari, Seiji Saito, Takashi Shimada, Takaaki Akamatsu, Michio Uchida, Ken Nakagawa, Takamitsu Soda, Shuuichi Tetsuno
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Publication number: 20120087700Abstract: An image forming apparatus includes: an image bearing member for bearing a toner image; a belt for conveying the toner image; and a transfer device for rubbing the belt, and a surface of the transfer device, which is brought into contact with the belt includes linear concave portions or linear convex portions. The image forming apparatus of the present invention prevents a friction force between the belt and the transfer device rubbing the belt from increasing and brings a transfer member into a stable contact with the belt for conveying the toner image, thereby suppressing increase in drive torque of the belt which rubs the transfer device and suppressing occurrence of image failure.Type: ApplicationFiled: December 16, 2011Publication date: April 12, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Kazuhiro DODA, Masaru SHIMURA, Shigeru HOASHI, Kenji KANARI, Seiji SAITO, Takashi SHIMADA, Takaaki AKAMATSU, Michio UCHIDA, Ken NAKAGAWA, Takamitsu SODA, Shuuichi TETSUNO
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Publication number: 20110318035Abstract: An image forming apparatus for forming image on a recording medium includes a photosensitive member, a motor, a belt, and a drive member to rotate the belt, the drive member including a driven coupling. The apparatus also includes a drive coupling to rotate by a driving force generated by the motor, the drive coupling being movable in an axial direction to take an engagement position at which the driving force is transmittable to the driven coupling, and a release position. The apparatus further includes a transfer member to transfer a toner image onto the recording medium or the belt, a voltage application unit to apply a voltage to the transfer member, and a control unit to cause the voltage application unit to apply the voltage to the transfer member after the drive coupling moves to the engagement position and the driving force is transmitted to the driven coupling.Type: ApplicationFiled: September 7, 2011Publication date: December 29, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Masaru Shimura, Michio Uchida, Ken Nakagawa, Seiji Saito, Kenji Kanari, Takamitsu Soda, Takaaki Akamatsu, Kazuhiro Doda, Takashi Shimada, Shuuichi Tetsuno, Shigeru Hoashi, Tomoya Kuruma
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Patent number: 8086160Abstract: A fixing roller has a base layer, a rubber layer formed on the base layer and a surface layer formed of a fluororesin tube, and a heater disposed inside the roller. The surface layer of the roller is formed by covering the fluororesin tube on the rubber layer in a condition where the fluororesin tube is pulled in a radial direction of the fluororesin tube, the fluororesin tube has an internal diameter less than an outer diameter of the roller and a thickness of 20 microns or smaller and a crystallization degree of the fluororesin tube being 50% or smaller. The roller is made by expanding the fluororesin tube is in a radial direction and drawing the fluororesin tube in a generatrix direction thereof, wherein a drawing ratio of the fluororesin tube in the drawing the fluororesin tube in the generatrix direction is 5% or smaller.Type: GrantFiled: December 3, 2008Date of Patent: December 27, 2011Assignee: Canon Kabushiki KaishaInventors: Yuki Nishizawa, Ken Nakagawa, Takaaki Akamatsu, Shuuichi Tetsuno, Yuichi Yajima
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Patent number: 8036574Abstract: An image forming apparatus for forming image on a recording medium includes a photosensitive member, a motor, a belt, and a drive member to rotate the belt, the drive member including a driven coupling. The apparatus also includes a drive coupling to rotate by a driving force generated by the motor, the drive coupling being movable in an axial direction to take an engagement position at which the driving force is transmittable to the driven coupling, and a release position. The apparatus further includes a transfer member to transfer a toner image onto the recording medium or the belt, a voltage application unit to apply a voltage to the transfer member, and a control unit to cause the voltage application unit to apply the voltage to the transfer member after the drive coupling moves to the engagement position and the driving force is transmitted to the driven coupling.Type: GrantFiled: March 31, 2009Date of Patent: October 11, 2011Assignee: Canon Kabushiki KaishaInventors: Masaru Shimura, Michio Uchida, Ken Nakagawa, Seiji Saito, Kenji Kanari, Takamitsu Soda, Takaaki Akamatsu, Kazuhiro Doda, Takashi Shimada, Shuuichi Tetsuno, Shigeru Hoashi, Tomoya Kuruma
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Publication number: 20090257779Abstract: An image forming apparatus for forming image on a recording medium includes a photosensitive member, a motor, a belt, and a drive member to rotate the belt, the drive member including a driven coupling. The apparatus also includes a drive coupling to rotate by a driving force generated by the motor, the drive coupling being movable in an axial direction to take an engagement position at which the driving force is transmittable to the driven coupling, and a release position. The apparatus further includes a transfer member to transfer a toner image onto the recording medium or the belt, a voltage application unit to apply a voltage to the transfer member, and a control unit to cause the voltage application unit to apply the voltage to the transfer member after the drive coupling moves to the engagement position and the driving force is transmitted to the driven coupling.Type: ApplicationFiled: March 31, 2009Publication date: October 15, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Masaru Shimura, Michio Uchida, Ken Nakagawa, Seiji Saito, Kenji Kanari, Takamitsu Soda, Takaaki Akamatsu, Kazuhiro Doda, Takashi Shimada, Shuuichi Tetsuno, Shigeru Hoashi, Tomoya Kuruma
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Publication number: 20090232530Abstract: An apparatus includes an image bearing member for carrying an image; an intermediary transfer member for receiving the image; a primary transfer member for transfer of the image onto the intermediary transfer member in a primary transfer station; a secondary transfer member for transfer of the image onto a transfer material in a secondary transfer station; a first charging member for charging toner remaining in a region upstream of the primary transfer station and downstream of the secondary transfer station; and a second charging member for charging the toner remaining in a region upstream of the primary transfer station and downstream of the first charging member. The first charging member rubs a surface of, and the second charging member moves in contact with, the intermediary transfer member, to transfer the toner remaining on the intermediary transfer member to the image bearing member simultaneously with the primary transfer.Type: ApplicationFiled: February 24, 2009Publication date: September 17, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Seiji Saito, Takuma Abe, Masaru Shimura, Ken Nakagawa, Kenji Kanari, Takamitsu Soda, Takaaki Akamatsu, Kazuhiro Doda, Takashi Shimada, Shuuichi Tetsuno
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Publication number: 20090202281Abstract: An image forming apparatus includes: an image bearing member for bearing a toner image; a belt for conveying the toner image; and a transfer device for rubbing the belt, and a surface of the transfer device, which is brought into contact with the belt includes linear concave portions or linear convex portions. The image forming apparatus of the present invention prevents a friction force between the belt and the transfer device rubbing the belt from increasing and brings a transfer member into a stable contact with the belt for conveying the toner image, thereby suppressing increase in drive torque of the belt which rubs the transfer device and suppressing occurrence of image failure.Type: ApplicationFiled: April 16, 2009Publication date: August 13, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Kazuhiro Doda, Masaru Shimura, Shigeru Hoashi, Kenji Kanari, Seiji Saito, Takashi Shimada, Takaaki Akamatsu, Michio Uchida, Ken Nakagawa, Takamitsu Soda, Shuuichi Tetsuno
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Publication number: 20090092426Abstract: A fixing apparatus, a roller for a fixing apparatus, and a flexible sleeve for a fixing apparatus are a roller for the fixing apparatus (1) having a rubber layer (1b) and a fluororesin tube as a surface layer (1c) covered thereon. A thickness of the fluororesin tube is 20 microns or smaller, and a crystallization degree of the fluororesin tube is 50% or smaller. Thus, in the roller for the fixing apparatus having the rubber layer on which the resin tube is covered as the surface layer, a crack does not occur in the fluororesin tube even if the fluororesin tube is made thin.Type: ApplicationFiled: December 3, 2008Publication date: April 9, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Yuki Nishizawa, Ken Nakagawa, Takaaki Akamatsu, Shuuichi Tetsuno, Yuichi Yajima