Patents by Inventor Masao Uyama
Masao Uyama 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: 10372079Abstract: A photosensitive member unit includes a photosensitive member, a transfer roller, a mounting portion capable of mounting a development unit including a development roller, a first gear and a second gear each provided at one end of the photosensitive member in an axial direction of the photosensitive member, and a third gear provided at one end of the transfer roller in an axial direction of the photosensitive member and configured to engage with the second gear. The first gear, the second gear, and the third gear are helical gears. A direction in which helical teeth of the first gear are inclined is opposite to a direction in which helical teeth of the second gear are inclined, and the direction in which the helical teeth of the first gear are inclined matches a direction in which helical teeth of the third gear are inclined.Type: GrantFiled: April 16, 2018Date of Patent: August 6, 2019Assignee: Canon Kabushiki KaishaInventors: Masao Uyama, Kenji Matsuda, Ken Kikuchi
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Patent number: 10191446Abstract: A photosensitive member cartridge detachably mountable to a main assembly of an image forming apparatus for forming an image, includes a frame; a photosensitive drum on which and which is provided in the frame; a transfer member for transferring an image formed on the drum onto the sheet; a mounting portion for detachably mounting a developing cartridge including a developer carrying member onto the drum and a memory for storing information; a first electrical contact provided on the frame and electrically connectable with a main assembly electrical contact provided in the main assembly when the cartridge is mounted to the main assembly; and a second electrical contact provided on the frame for electrically connecting the memory and the first electrical contact portion with each other when the developing cartridge is mounted to the mounting portion.Type: GrantFiled: June 1, 2017Date of Patent: January 29, 2019Assignee: CANON KABUSHIKI KAISHAInventors: Jun Miyamoto, Masao Uyama, Kenji Matsuda, Ken Kikuchi, Jun Miyazaki
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Publication number: 20180348699Abstract: A photosensitive member cartridge detachably mountable to a main assembly of an image forming apparatus for forming an image, includes a frame; a photosensitive drum on which and which is provided in the frame; a transfer member for transferring an image formed on the drum onto the sheet; a mounting portion for detachably mounting a developing cartridge including a developer carrying member onto the drum and a memory for storing information; a first electrical contact provided on the frame and electrically connectable with a main assembly electrical contact provided in the main assembly when the cartridge is mounted to the main assembly; and a second electrical contact provided on the frame for electrically connecting the memory and the first electrical contact portion with each other when the developing cartridge is mounted to the mounting portion.Type: ApplicationFiled: August 7, 2018Publication date: December 6, 2018Inventors: Jun Miyamoto, Masao Uyama, Kenji Matsuda, Ken Kikuchi, Jun Miyazaki
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Publication number: 20180299823Abstract: A photosensitive member unit includes a photosensitive member, a transfer roller, a mounting portion capable of mounting a development unit including a development roller, a first gear and a second gear each provided at one end of the photosensitive member in an axial direction of the photosensitive member, and a third gear provided at one end of the transfer roller in an axial direction of the photosensitive member and configured to engage with the second gear. The first gear, the second gear, and the third gear are helical gears. A direction in which helical teeth of the first gear are inclined is opposite to a direction in which helical teeth of the second gear are inclined, and the direction in which the helical teeth of the first gear are inclined matches a direction in which helical teeth of the third gear are inclined.Type: ApplicationFiled: April 16, 2018Publication date: October 18, 2018Inventors: Masao Uyama, Kenji Matsuda, Ken Kikuchi
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Patent number: 9823621Abstract: A photosensitive member cartridge detachably mountable to a main assembly of an image forming apparatus for forming an image, includes a frame; a photosensitive drum on which and which is provided in the frame; a transfer member for transferring an image formed on the drum onto the sheet; a mounting portion for detachably mounting a developing cartridge including a developer carrying member onto the drum and a memory for storing information; a first electrical contact provided on the frame and electrically connectable with a main assembly electrical contact provided in the main assembly when the cartridge is mounted to the main assembly; and a second electrical contact provided on the frame for electrically connecting the memory and the first electrical contact portion with each other when the developing cartridge is mounted to the mounting portion.Type: GrantFiled: May 27, 2016Date of Patent: November 21, 2017Assignee: Canon Kabushiki KaishaInventors: Jun Miyamoto, Masao Uyama, Kenji Matsuda, Ken Kikuchi, Jun Miyazaki
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Patent number: 9766571Abstract: A developing device configured to develop a latent image formed on an image bearing member includes a rotatable developing-agent bearing member configured to bear developing agent, a developing container configured to form a developing-agent storage chamber that stores the developing agent, a developing-agent regulating portion provided in the developing container to regulate an amount of the developing agent born on the developing-agent bearing member, a support portion configured to support the developing-agent bearing member movably relative to the developing-agent regulating portion, and a pressurizing member configured to pressurize the developing-agent bearing member toward the developing-agent regulating portion. A contact portion of the developing-agent regulating portion with the developing-agent bearing member is fixed to the developing container without forming a gap from the developing container on a downstream side in a pressurizing direction of the pressurizing member.Type: GrantFiled: October 29, 2015Date of Patent: September 19, 2017Assignee: Canon Kabushiki KaishaInventors: Daisuke Baba, Makoto Tokudome, Masao Uyama, Yuichiro Hirata, Kodai Hayashi, Keisuke Mochizuki, Norihito Naito
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Publication number: 20170261923Abstract: A photosensitive member cartridge detachably mountable to a main assembly of an image forming apparatus for forming an image, includes a frame; a photosensitive drum on which and which is provided in the frame; a transfer member for transferring an image formed on the drum onto the sheet; a mounting portion for detachably mounting a developing cartridge including a developer carrying member onto the drum and a memory for storing information; a first electrical contact provided on the frame and electrically connectable with a main assembly electrical contact provided in the main assembly when the cartridge is mounted to the main assembly; and a second electrical contact provided on the frame for electrically connecting the memory and the first electrical contact portion with each other when the developing cartridge is mounted to the mounting portion.Type: ApplicationFiled: June 1, 2017Publication date: September 14, 2017Inventors: Jun Miyamoto, Masao Uyama, Kenji Matsuda, Ken Kikuchi, Jun Miyazaki
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Publication number: 20160349699Abstract: A photosensitive member cartridge detachably mountable to a main assembly of an image forming apparatus for forming an image, includes a frame; a photosensitive drum on which and which is provided in the frame; a transfer member for transferring an image formed on the drum onto the sheet; a mounting portion for detachably mounting a developing cartridge including a developer carrying member onto the drum and a memory for storing information; a first electrical contact provided on the frame and electrically connectable with a main assembly electrical contact provided in the main assembly when the cartridge is mounted to the main assembly; and a second electrical contact provided on the frame for electrically connecting the memory and the first electrical contact portion with each other when the developing cartridge is mounted to the mounting portion.Type: ApplicationFiled: May 27, 2016Publication date: December 1, 2016Inventors: Jun Miyamoto, Masao Uyama, Kenji Matsuda, Ken Kikuchi, Jun Miyazaki
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Publication number: 20160062265Abstract: A developing device configured to develop a latent image formed on an image bearing member includes a rotatable developing-agent bearing member configured to bear developing agent, a developing container configured to form a developing-agent storage chamber that stores the developing agent, a developing-agent regulating portion provided in the developing container to regulate an amount of the developing agent born on the developing-agent bearing member, a support portion configured to support the developing-agent bearing member movably relative to the developing-agent regulating portion, and a pressurizing member configured to pressurize the developing-agent bearing member toward the developing-agent regulating portion. A contact portion of the developing-agent regulating portion with the developing-agent bearing member is fixed to the developing container without forming a gap from the developing container on a downstream side in a pressurizing direction of the pressurizing member.Type: ApplicationFiled: October 29, 2015Publication date: March 3, 2016Inventors: Daisuke Baba, Makoto Tokudome, Masao Uyama, Yuichiro Hirata, Kodai Hayashi, Keisuke Mochizuki, Norihito Naito
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Patent number: 9256157Abstract: A developing apparatus includes a developing container for accommodating a developer; a developer carrying member for carrying the developer to a developing zone for developing a latent image; a developer regulator in contact with the developer carrying member to regulate a developer layer thickness on the developer carrying member; a developer feeding member in contact with the developer carrying member to supply the developer to the developer carrying member; an urging member for urging the developer carrying member toward the developer regulator; and a moving mechanism for moving the developer carrying member in a first direction which is a direction in which the urging member urges the developer carrying member and in a second direction crossing with the first direction. The moving mechanism moves the developer carrying member in the second direction to reduce or remove press-contact forces applied by the developer regulator and the developer feeding member.Type: GrantFiled: June 26, 2013Date of Patent: February 9, 2016Assignee: Canon Kabushiki KaishaInventors: Makoto Tokudome, Daisuke Baba, Yuichiro Hirata, Norihito Naito, Kodai Hayashi, Masao Uyama
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Patent number: 9213257Abstract: A developing device configured to develop a latent image formed on an image bearing member includes a rotatable developing-agent bearing member configured to bear developing agent, a developing container configured to form a developing-agent storage chamber that stores the developing agent, a developing-agent regulating portion provided in the developing container to regulate an amount of the developing agent born on the developing-agent bearing member, a support portion configured to support the developing-agent bearing member movably relative to the developing-agent regulating portion, and a pressurizing member configured to pressurize the developing-agent bearing member toward the developing-agent regulating portion. A contact portion of the developing-agent regulating portion with the developing-agent bearing member is fixed to the developing container without forming a gap from the developing container on a downstream side in a pressurizing direction of the pressurizing member.Type: GrantFiled: December 14, 2012Date of Patent: December 15, 2015Assignee: Canon Kabushiki KaishaInventors: Daisuke Baba, Makoto Tokudome, Masao Uyama, Yuichiro Hirata, Kodai Hayashi, Keisuke Mochizuki, Norihito Naito
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Patent number: 9098060Abstract: A cleaning device includes a cleaning member for removing a developer from a surface of a member to be cleaned and the cleaning member includes a blade portion, and a flexible plate-like supporting member configured to support the blade portion, the supporting member including one end portion, in which the blade portion is provided, the other end portion, which has a portion to be fixed to a frame member, a bent portion, which is positioned between the one end portion and a side plate portion projecting from a side end of the one end portion, and a sealing member, which is provided between the cleaning member and the frame member, configured to prevent the developer from leaking from a storage chamber and fixed to one of the side plate portion and the frame member.Type: GrantFiled: February 25, 2014Date of Patent: August 4, 2015Assignee: Canon Kabushiki KaishaInventors: Yousuke Watanabe, Masao Uyama
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Patent number: 9069312Abstract: An image forming apparatus includes a conductive member paired with one of a developer carrying member and an image bearing member to form a capacitor. A contact-separation member assumes a first position for bringing the developer carrying member into contact with the image bearing member and a second position for separating the developer carrying member from the image bearing member. A detecting unit detects a value relating to a capacitance of the capacitor when a voltage is applied to the capacitor, and a control unit detects whether or not the image forming apparatus is ready for image formation by comparing a first detected result and a second detected result to each other. The first detected result is detected when the contact-separation member assumes the first position, and the second detected result is detected when the contact-separation member assumes the second position.Type: GrantFiled: March 27, 2013Date of Patent: June 30, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Ryosuke Kanai, Kohei Matsuda, Masao Uyama, Koichiro Takashima
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Patent number: 9052678Abstract: A cleaning device includes a fixing portion provided on a frame, a cleaning member, and an accommodating portion. The cleaning member includes a blade portion contacted to an image bearing member (drum) and a supporting member. The supporting member includes one end portion where the blade portion is provided, another end portion including a portion-to-be-fixed for being fixed at the fixing portion, and a bent portion between the one end portion and the other end portion in a side remote from a surface of the drum toward an outside with respect to a line connecting the portion-to-be-fixed and a contact portion where the blade portion is contacted to the drum. The portion-to-be-fixed is provided downstream of the contact portion with respect to movement direction of the drum. Between the frame and the other end portion, a gap for permitting elastic deformation of the other end portion is provided.Type: GrantFiled: August 29, 2012Date of Patent: June 9, 2015Assignee: Canon Kabushiki KaishaInventors: Hideto Oka, Masao Uyama, Kenji Shindo, Nobuyoshi Yoshida, Ryosuke Kanai, Satoru Inami
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Patent number: 9002236Abstract: A cleaning device, which is detachably attached to a main body of an image forming apparatus, includes a fixing portion provided at a frame member, a cleaning member fixed to the fixing portion for removing a developer from an image bearing member, the cleaning member including a blade portion configured to contact the image bearing member and a flexible support member for supporting the blade portion, a container formed by the frame member and configured to contain the developer removed from the image bearing member, and a restricting member configured to engage with the support member and being capable of restricting the support member from being deformed.Type: GrantFiled: October 24, 2012Date of Patent: April 7, 2015Assignee: Canon Kabushiki KaishaInventor: Masao Uyama
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Patent number: 8995900Abstract: A cleaning member includes a blade portion contacted to a member-to-be-cleaned with respect to a direction counter to a movement direction of the member-to-be-cleaned, and a flexible supporting member. The supporting member includes one end portion where the blade portion is provided, another end portion including a portion-to-be-fixed for being fixed at the fixing portion, and a bent portion between the one end portion and the other end portion in a side remote from a surface of the member-to-be-cleaned toward an outside with respect to a line connecting the portion-to-be-fixed and a contact portion where the blade portion is contacted to the member-to-be-cleaned. The portion-to-be-fixed is provided downstream of the contact portion with respect to the movement direction of the member-to-be-cleaned. The blade portion is supported by the supporting member in contact to only the one end portion.Type: GrantFiled: August 29, 2012Date of Patent: March 31, 2015Assignee: Canon Kabushiki KaishaInventors: Kenji Shindo, Masao Uyama, Masaki Ojima
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Publication number: 20140348556Abstract: A developing device configured to develop a latent image formed on an image bearing member includes a rotatable developing-agent bearing member configured to bear developing agent, a developing container configured to form a developing-agent storage chamber that stores the developing agent, a developing-agent regulating portion provided in the developing container to regulate an amount of the developing agent born on the developing-agent bearing member, a support portion configured to support the developing-agent bearing member movably relative to the developing-agent regulating portion, and a pressurizing member configured to pressurize the developing-agent bearing member toward the developing-agent regulating portion. A contact portion of the developing-agent regulating portion with the developing-agent bearing member is fixed to the developing container without forming a gap from the developing container on a downstream side in a pressurizing direction of the pressurizing member.Type: ApplicationFiled: December 14, 2012Publication date: November 27, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Daisuke Baba, Makoto Tokudome, Masao Uyama, Yuichiro Hirata, Kodai Hayashi, Keisuke Mochizuki, Norihito Naito
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Publication number: 20140241772Abstract: A cleaning device includes a cleaning member for removing a developer from a surface of a member to be cleaned and the cleaning member includes a blade portion, and a flexible plate-like supporting member configured to support the blade portion, the supporting member including one end portion, in which the blade portion is provided, the other end portion, which has a portion to be fixed to a frame member, a bent portion, which is positioned between the one end portion and a side plate portion projecting from a side end of the one end portion, and a sealing member, which is provided between the cleaning member and the frame member, configured to prevent the developer from leaking from a storage chamber and fixed to one of the side plate portion and the frame member.Type: ApplicationFiled: February 25, 2014Publication date: August 28, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Yousuke Watanabe, Masao Uyama
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Publication number: 20140153989Abstract: A cleaning member includes: a blade portion contacted to the member-to-be-cleaned with respect to a counter direction to a movement direction of the member-to-be-cleaned; and a flexible supporting member. The supporting member includes one end portion where the blade portion is provided, another end portion including a portion-to-be-fixed for being fixed at the fixing portion, and a bent portion between the one end portion and the another end portion in a side remote from a surface of the member-to-be-cleaned toward an outside with respect to a line connecting the portion-to-be-fixed and a contact portion where the blade portion is contacted to the member-to-be-cleaned. The portion-to-be-fixed is provided downstream of the contact portion with respect to movement direction of the member-to-be-cleaned. The blade portion is supported by the supporting member in contact to only the one end portion.Type: ApplicationFiled: August 29, 2012Publication date: June 5, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Kenji Shindo, Masao Uyama, Masaki Ojima
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Publication number: 20140153990Abstract: A cleaning device includes: a fixing portion provided on a frame; a cleaning member; and an accommodating portion. The cleaning member includes: a blade portion contacted to an image bearing member (drum); and a supporting member. The supporting member includes one end portion where the blade portion is provided, another end portion including a portion-to-be-fixed for being fixed at the fixing portion, and a bent portion between the one end portion and the another end portion in a side remote from a surface of the drum toward an outside with respect to a line connecting the portion-to-be-fixed and a contact portion where the blade portion is contacted to the drum. The portion-to-be-fixed is provided downstream of the contact portion with respect to movement direction of the drum. Between the frame and the another end portion, a gap for permitting elastic deformation of the another end portion is provided.Type: ApplicationFiled: August 29, 2012Publication date: June 5, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Hideto Oka, Masao Uyama, Kenji Shindo, Nobuyoshi Yoshida, Ryosuke Kanai, Satoru Inami