Patents by Inventor Hiroki Kasama
Hiroki Kasama 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: 10496019Abstract: An image forming apparatus includes a conveyance path, an image forming unit, an opening/closing member, a facing member, a first member, and a second member. The conveyance path conveys a sheet. The image forming unit forms an image on a sheet conveyed along the conveyance path. The opening/closing member is openable and closable with respect to an apparatus main body. A part of the conveyance path is exposed in a case where the opening/closing member is opened. Where the opening/closing member is closed with respect to the apparatus main body, the facing member is provided on a position facing the opening/closing member. The first member is provided in the opening/closing member. The second member is provided in the facing member. Where the opening/closing member is closed by a fixing member with respect to the apparatus main body, the first member and the second member form a Helmholtz resonator.Type: GrantFiled: September 20, 2018Date of Patent: December 3, 2019Assignee: Canon Kabushiki KaishaInventor: Hiroki Kasama
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Patent number: 10474053Abstract: An image forming apparatus includes a transfer unit to transfer a toner image onto a sheet, a fusing unit, a discharging unit to discharge the sheet passed through the fusing unit, a guide member having a through-hole at a conveying surface and provided downstream of the fusing unit and upstream of the discharging unit in a conveying direction of the sheet, and a Helmholtz resonator. The Helmholtz resonator includes a cavity portion and communicating portions through which the cavity portion is in communication with an outside area. The Helmholtz resonator and a conveying path of the sheet guided by the guide member are connected through the through-hole. The Helmholtz resonator is disposed on a downstream side with respect to the fusing unit and on an upstream side with respect to the discharging unit in the conveying direction of the sheet, and the communicating portion is disposed facing the guide member.Type: GrantFiled: September 26, 2018Date of Patent: November 12, 2019Assignee: Canon Kabushiki KaishaInventors: Toru Sakano, Hiroki Kasama
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Publication number: 20190137912Abstract: An image forming apparatus includes a conveyance path, an image forming unit, an opening/closing member, a facing member, a first member, and a second member. The conveyance path conveys a sheet. The image forming unit forms an image on a sheet conveyed along the conveyance path. The opening/closing member is openable and closable with respect to an apparatus main body. A part of the conveyance path is exposed in a case where the opening/closing member is opened. Where the opening/closing member is closed with respect to the apparatus main body, the facing member is provided on a position facing the opening/closing member. The first member is provided in the opening/closing member. The second member is provided in the facing member. Where the opening/closing member is closed by a fixing member with respect to the apparatus main body, the first member and the second member form a Helmholtz resonator.Type: ApplicationFiled: September 20, 2018Publication date: May 9, 2019Inventor: Hiroki Kasama
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Publication number: 20190121253Abstract: An image forming apparatus includes a transfer unit to transfer a toner image onto a sheet, a fusing unit, a discharging unit to discharge the sheet passed through the fusing unit, a guide member having a through-hole at a conveying surface and provided downstream of the fusing unit and upstream of the discharging unit in a conveying direction of the sheet, and a Helmholtz resonator. The Helmholtz resonator includes a cavity portion and communicating portions through which the cavity portion is in communication with an outside area. The Helmholtz resonator and a conveying path of the sheet guided by the guide member are connected through the through-hole. The Helmholtz resonator is disposed on a downstream side with respect to the fusing unit and on an upstream side with respect to the discharging unit in the conveying direction of the sheet, and the communicating portion is disposed facing the guide member.Type: ApplicationFiled: September 26, 2018Publication date: April 25, 2019Inventors: Toru Sakano, Hiroki Kasama
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Patent number: 10054181Abstract: A damping component includes a base with an attachment portion to be attached to a vibrated member, a damping member disposed at an outer circumferential side of the base while being compressed, and a holding portion disposed at an outer circumferential side of the damping member and compressively holding the damping member. The damping member has rigidity lower than rigidity of the base and rigidity of the holding portion and has a loss factor, measured by a mechanical impedance method in a state being compressed between the base and the holding portion, of 0.05 or more.Type: GrantFiled: March 17, 2016Date of Patent: August 21, 2018Assignee: Canon Kabushiki KaishaInventors: Rie Endo, Katsunori Yokoyama, Shinji Yamamoto, Kazuaki Takahata, Kazumasa Shibata, Hiroki Kasama, Satoru Nitobe
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Patent number: 9958026Abstract: A damping structure includes a first frame on which a driving portion is mounted, a second frame provided at a position facing the first frame in a state being connected with the first frame, a projecting portion provided projectively from one frame toward the other frame of the first and second frames, and a damping member compressively held between the projecting portion and the other frame. The damping member has rigidity lower than rigidities of the first and second frames and of the projecting portion and has a loss factor, measured by a mechanical impedance method in the state being compressed between the projecting portion and the other frame, of 0.05 or more.Type: GrantFiled: March 17, 2016Date of Patent: May 1, 2018Assignee: CANON KABUSHIKI KAISHAInventors: Rie Endo, Katsunori Yokoyama, Shinji Yamamoto, Kazuaki Takahata, Kazumasa Shibata, Hiroki Kasama
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Patent number: 9915913Abstract: An image forming apparatus includes a main body, a cover, a driving unit, and a film. The main body is configured to accommodate an image forming portion which forms an image on a recording material. The cover is provided on the main body and covers the image forming portion. The driving unit is provided on the main body and drives the image forming portion. The film is attached to the cover with a gap formed against an inner wall of the cover. The film faces the inner wall of the cover while a tension is given thereto and without coming into contact with the driving unit.Type: GrantFiled: September 26, 2016Date of Patent: March 13, 2018Assignee: Canon Kabushiki KaishaInventors: Kazuaki Takahata, Katsunori Yokoyama, Shinji Yamamoto, Rie Endo, Kazumasa Shibata, Hiroki Kasama
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Patent number: 9863496Abstract: A dumping structure includes a first frame on which a driving portion is mounted, a second frame, a fixture fixing the first frame to the second frame, a restrict portion, provided around the fixture and provided between the first and second frames, which restricts a distance between the first and second frames, and a damping member, provided around the restrict portion, which is compressed by the first and second frame. The damping member has rigidity lower than rigidity of the first frame, rigidity of the second frame and rigidity of the restrict portion, and has a loss factor, measured by a mechanical impedance method in the state being compressed between the first and second frames, of 0.05 or more.Type: GrantFiled: March 18, 2016Date of Patent: January 9, 2018Assignee: Canon Kabushiki KaishaInventors: Rie Endo, Katsunori Yokoyama, Shinji Yamamoto, Kazuaki Takahata, Kazumasa Shibata, Hiroki Kasama
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Publication number: 20170097606Abstract: An image forming apparatus includes: a main body configured to accommodate an image forming portion which forms an image on a recording material; a cover which is provided on the main body and covers the image forming portion; a driving unit which is provided on the main body and drives the image forming portion; and a film attached to the cover with a gap formed against an inner wall of the cover, the film facing the inner wall of the cover while a tension is given thereto and without coming into contact with the driving unit.Type: ApplicationFiled: September 26, 2016Publication date: April 6, 2017Inventors: Kazuaki Takahata, Katsunori Yokoyama, Shinji Yamamoto, Rie Endo, Kazumasa Shibata, Hiroki Kasama
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Publication number: 20160378050Abstract: Included is a fixation portion having one end joined with a flat plate, and the other end fixed to a support plate that supports at least a part of a drive transmission portion including a drive transmission member that transits driving force caused in a drive source, and a length in a longitudinal direction and a length in a short direction are set such that a first vibration frequency vibrating in the longitudinal direction of the flat plate and a second vibration frequency vibrating in the short direction of the flat plate respectively resonate with mutually different vibration frequencies caused in the support plate around a portion where the fixation portion and the flat plate are joined.Type: ApplicationFiled: June 22, 2016Publication date: December 29, 2016Inventors: Shinji Yamamoto, Katsunori Yokoyama, Kazuaki Takahata, Rie Endo, Kazumasa Shibata, Hiroki Kasama
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Publication number: 20160297633Abstract: Provided are a sheet feeding device and an image forming apparatus which can separately feed a sheet with safety without causing the length of an adsorption member to be increased. One end of a flexible adsorption member (29) is fixed to a holding member (24) which is disposed on the upper side of a storing unit to store the sheet and rotated in a sheet feeding direction. Then, when the holding member (24) is rotated, the rigidity of a second region (29b) of the adsorption member (29) is set to be lower than that of a first region (29a) of the adsorption member (29) which comes into surface contact with the sheet stored in the storing unit and adsorbs the sheet by an adsorbing force by static electricity.Type: ApplicationFiled: March 20, 2014Publication date: October 13, 2016Inventors: Hiroki Kasama, Yasumi Yoshida, Tadashi Matsumoto, Kazumasa Shibata, Takashi Hiratsuka, Takeshi Aoyama, Takaaki Aoyagi
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Publication number: 20160289022Abstract: Provided are a sheet feeding device and an image forming apparatus which can feed a sheet by an electrostatic adsorption with a simple configuration and with low noises. One end of a flexible adsorption member (29) is fixed to a holding member (24) rotating in a sheet feeding direction, and comes into surface contact with a sheet (P) stored in a sheet feeding cassette (20) while being elastically deformed when the holding member (24) is rotated, and adsorbs the sheet (P) by an adsorbing force by static electricity. Then, the sheet (P1) adsorbed to the adsorption member (29) is delivered to a registration roller (15) while winding up the adsorption member (29), and then the holding member (24) is stopped at a position where the adsorption member (29) is separated from the sheet.Type: ApplicationFiled: March 20, 2014Publication date: October 6, 2016Inventors: Kazumasa Shibata, Hiroki Kasama, Yasumi Yoshida, Tadashi Matsumoto, Takashi Hiratsuka, Takeshi Aoyama, Takaaki Aoyagi
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Publication number: 20160273611Abstract: A damping structure includes a first frame on which a driving portion is mounted, a second frame provided at a position facing the first frame in a state being connected with the first frame, a project portion provided projectively from one frame toward the other frame among the first and second frames, and a damping member compressively held between the project portion and the other frame. The damping member has rigidity lower than rigidities of the first and second frames and of the project portion and has a loss factor, measured by a mechanical impedance method in the state being compressed between the project portion and the other frame, of 0.05 or more.Type: ApplicationFiled: March 17, 2016Publication date: September 22, 2016Inventors: Rie Endo, Katsunori Yokoyama, Shinji Yamamoto, Kazuaki Takahata, Kazumasa Shibata, Hiroki Kasama
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Publication number: 20160273612Abstract: A dumping structure includes a first frame on which a driving portion is mounted, a second frame, a fixture fixing the first frame to the second frame, a restrict portion, provided around the fixture and provided between the first and second frames, which restricts a distance between the first and second frames, and a damping member, provided around the restrict portion, which is compressed by the first and second frame. The damping member has rigidity lower than rigidity of the first frame, rigidity of the second frame and rigidity of the restrict portion, and has a loss factor, measured by a mechanical impedance method in the state being compressed between the first and second frames, of 0.05 or more.Type: ApplicationFiled: March 18, 2016Publication date: September 22, 2016Inventors: Rie Endo, Katsunori Yokoyama, Shinji Yamamoto, Kazuaki Takahata, Kazumasa Shibata, Hiroki Kasama
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Publication number: 20160273605Abstract: A damping component includes a base with an attachment portion to be attached to a vibrated member, a damping member disposed at an outer circumferential side of the base while being compressed, and a holding portion disposed at an outer circumferential side of the damping member and compressively holding the damping member. The damping member has rigidity lower than rigidity of the base and rigidity of the holding portion and has a loss factor, measured by a mechanical impedance method in a state being compressed between the base and the holding portion, of 0.05 or more.Type: ApplicationFiled: March 17, 2016Publication date: September 22, 2016Inventors: Rie Endo, Katsunori Yokoyama, Shinji Yamamoto, Kazuaki Takahata, Kazumasa Shibata, Hiroki Kasama, Satoru Nitobe