Patents by Inventor Shinjiro Toba
Shinjiro Toba 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: 8213831Abstract: A process cartridge includes an electrophotographic photosensitive drum and a developing roller that is movable between a contacting position in which the developing roller is in contact with the electrophotographic photosensitive drum and a spaced position in which the developing roller is spaced from the electrophotographic photosensitive drum. The apparatus further includes a spacing force receiving portion that is movable between a projected position and a retracted position, and a projecting force receiving portion that receives an external force to move the spacing force receiving portion from the retracted position to the projected position.Type: GrantFiled: November 19, 2010Date of Patent: July 3, 2012Assignee: Canon Kabushiki KaishaInventors: Shinjiro Toba, Akira Yoshimura, Susumu Nittani
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Publication number: 20110206412Abstract: A process cartridge detachably is mountable to a main assembly of the apparatus of an image forming apparatus including an urging member and a positioning portion. The cartridge includes a photosensitive drum; a positionable portion positioning the cartridge by engaging the positioning portion when the cartridge is mounted to the apparatus; first and second urgable portions being urged respectively, by first and second urging portions of the urging member to urge the positionable portion to the positioning portion during cartridge mounting; and an electrical contact, provided between the first and second urgable portions with respect to a horizontal direction crossing an axis of the drum, for connecting electrically to an electrical contact portion in the urging member, when the cartridge is mounted to the apparatus.Type: ApplicationFiled: April 27, 2011Publication date: August 25, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Masato Tanabe, Susumu Nittani, Shinjiro Toba, Tomio Noguchi
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Publication number: 20110142491Abstract: A developing cartridge detachably mountable to image forming apparatus includes a developer carrying member for developing an electrostatic latent image formed on the image bearing member; a protecting member, demountable in the axial direction of said developer carrying member from said frame; an accommodating portion accommodating the developer to be supplied to said developer carrying member; a sealing member sealing an opening for permitting the developer to be supplied from said accommodating portion to said developer carrying member; and a grip portion, provided at one longitudinal end of said sealing member, for being gripped when said sealing member is removed from said opening, said grip portion being movable between a first position on a movement locus of said protecting member when said protecting member is dismounted from said frame, and a second position outside the movement locus.Type: ApplicationFiled: February 18, 2011Publication date: June 16, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Tetsuya Numata, Shigeo Miyabe, Takahito Ueno, Shinjiro Toba
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Patent number: 7953340Abstract: A process cartridge detachably is mountable to a main assembly of the apparatus of an image forming apparatus including an urging member and a positioning portion. The cartridge includes a photosensitive drum; a positionable portion positioning the cartridge by engaging the positioning portion when the cartridge is mounted to the apparatus; first and second urgable portions being urged respectively, by first and second urging portions of the urging member to urge the positionable portion to the positioning portion during cartridge mounting; and an electrical contact, provided between the first and second urgable portions with respect to a horizontal direction crossing an axis of the drum, for connecting electrically to an electrical contact portion in the urging member, when the cartridge is mounted to the apparatus.Type: GrantFiled: February 18, 2010Date of Patent: May 31, 2011Assignee: Canon Kabushiki KaishaInventors: Masato Tanabe, Susumu Nittani, Shinjiro Toba, Tomio Noguchi
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Publication number: 20110103834Abstract: A cartridge attachable to and detachable from an image forming apparatus main body includes a rotating member, a supporting member configured to rotatably support the rotating member, a regulating portion configured to abut against an end surface of the rotating member in a rotational axis direction to regulate movement in the rotational axis direction, a hole portion configured to expose a portion of the end surface so as to enable a contact portion provided on the image forming apparatus main body to contact the end surface, a concave portion configured to retain grease, and a wall surface in the concave portion located at a downstream side in a rotation direction and provided such that an area of the wall surface that is farther from the hole portion than an area thereof that is closer to the hole portion is located at the downstream side of the rotation direction.Type: ApplicationFiled: October 26, 2010Publication date: May 5, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Shinjiro Toba, Tetsushi Uneme
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Publication number: 20110103839Abstract: An image forming apparatus includes an image bearing member; a developing device; and a movable member for rotationally moving the developing device. The movable member includes a rotation shaft member, a first member which is engaged with the rotation shaft member at one end portion, a second member which is engaged with the rotation shaft member at the other end portion, a first guide portion, and a second guide portion. The apparatus further includes a first swingable supporting member for rotatably supporting the movable member at the one end portion; a second swingable supporting member for rotatably supporting the movable member at the other end portion; an urging portion for urging the movable member toward the image bearing member; a first preventing member for preventing movement of the first member; and a second preventing member for preventing movement of the second member.Type: ApplicationFiled: September 29, 2010Publication date: May 5, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Shinjiro Toba, Takahito Ueno, Shigeo Miyabe
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Publication number: 20110064459Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes an electrophotographic photosensitive drum; developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum; drum frame supporting the electrophotographic photosensitive drum; a developing frame supporting the developing roller, the developing frame is movable relative to the drum frame and is capable of taking a contacting position in which the developing roller is in contact with the electrophotographic photosensitive drum; and a force receiving device including a first force receiving portion for receiving a first external force and a second force receiving portion for receiving a second external force, wherein the second force receiving portion is movable relative to the developing frame, wherein the second force receiving portion is placed in a stand-by position retracted from an operating position by the first force receiving portionType: ApplicationFiled: November 19, 2010Publication date: March 17, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Shinjiro Toba, Akira Yoshimura, Susumu Nittani
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Patent number: 7894733Abstract: A process cartridge detachably is mountable to a main assembly of the apparatus of an image forming apparatus including an urging member and a positioning portion. The cartridge includes a photosensitive drum; a positionable portion positioning the cartridge by engaging the positioning portion when the cartridge is mounted to the apparatus; first and second urgable portions being urged respectively, by first and second urging portions of the urging member to urge the positionable portion to the positioning portion during cartridge mounting; and an electrical contact, provided between the first and second urgable portions with respect to a horizontal direction crossing an axis of the drum, for connecting electrically to an electrical contact portion in the urging member, when the cartridge is mounted to the apparatus.Type: GrantFiled: February 18, 2010Date of Patent: February 22, 2011Assignee: Canon Kabushiki KaishaInventors: Masato Tanabe, Susumu Nittani, Shinjiro Toba, Tomio Noguchi
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Patent number: 7860433Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes an electrophotographic photosensitive drum, a developing roller, a drum frame, a movable developing frame taking a position where the roller contacts the drum, and a force receiver having first and second force receivers for receiving first and second external forces. The second force receiver moves relative to the developing frame. The second force receiver takes a stand-by position retracted from an operating position when the first force receiver receives the first external force, and moves from the stand-by to the operating position for moving the developing frame from the contacting position to the spacing position. The distance the second force receiver moves from the stand-by to the operating position is larger than the distance the first force receiver moves by the first external force.Type: GrantFiled: June 30, 2008Date of Patent: December 28, 2010Assignee: Canon Kabushiki KaishaInventors: Shinjiro Toba, Akira Yoshimura, Susumu Nittani
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Publication number: 20100158563Abstract: A process cartridge detachably is mountable to a main assembly of the apparatus of an image forming apparatus including an urging member and a positioning portion. The cartridge includes a photosensitive drum; a positionable portion positioning the cartridge by engaging the positioning portion when the cartridge is mounted to the apparatus; first and second urgable portions being urged respectively, by first and second urging portions of the urging member to urge the positionable portion to the positioning portion during cartridge mounting; and an electrical contact, provided between the first and second urgable portions with respect to a horizontal direction crossing an axis of the drum, for connecting electrically to an electrical contact portion in the urging member, when the cartridge is mounted to the apparatus.Type: ApplicationFiled: February 18, 2010Publication date: June 24, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Masato Tanabe, Susumu Nittani, Shinjiro Toba, Tomio Noguchi
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Publication number: 20100142996Abstract: A process cartridge detachably is mountable to a main assembly of the apparatus of an image forming apparatus including an urging member and a positioning portion. The cartridge includes a photosensitive drum; a positionable portion positioning the cartridge by engaging the positioning portion when the cartridge is mounted to the apparatus; first and second urgable portions being urged respectively, by first and second urging portions of the urging member to urge the positionable portion to the positioning portion during cartridge mounting; and an electrical contact, provided between the first and second urgable portions with respect to a horizontal direction crossing an axis of the drum, for connecting electrically to an electrical contact portion in the urging member, when the cartridge is mounted to the apparatus.Type: ApplicationFiled: February 18, 2010Publication date: June 10, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Masato Tanabe, Susumu Nittani, Shinjiro Toba, Tomio Noguchi
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Patent number: 7715746Abstract: A process cartridge detachably is mountable to a main assembly of the apparatus of an image forming apparatus including an urging member and a positioning portion. The cartridge includes a photosensitive drum; a positionable portion positioning the cartridge by engaging the positioning portion when the cartridge is mounted to the apparatus; first and second urgable portions being urged respectively, by first and second urging portions of the urging member to urge the positionable portion to the positioning portion during cartridge mounting; and an electrical contact, provided between the first and second urgable portions with respect to a horizontal direction crossing an axis of the drum, for connecting electrically to an electrical contact portion in the urging member, when the cartridge is mounted to the apparatus.Type: GrantFiled: January 22, 2007Date of Patent: May 11, 2010Assignee: Canon Kabushiki KaishaInventors: Masato Tanabe, Susumu Nittani, Shinjiro Toba, Tomio Noguchi
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Publication number: 20090003875Abstract: A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes an electrophotographic photosensitive drum; developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum; drum frame supporting the electrophotographic photosensitive drum; a developing frame supporting the developing roller, the developing frame is movable relative to the drum frame and is capable of taking a contacting position in which the developing roller is in contact with the electrophotographic photosensitive drum; and a force receiving device including a first force receiving portion for receiving a first external force and a second force receiving portion for receiving a second external force, wherein the second force receiving portion is movable relative to the developing frame, wherein the second force receiving portion is placed in a stand-by position retracted from an operating position by the first force receiving portionType: ApplicationFiled: June 30, 2008Publication date: January 1, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Shinjiro Toba, Akira Yoshimura, Susumu Nittani
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Patent number: 7412193Abstract: A developer feeding member for use with an electrophotographic image forming apparatus to feed a developer accommodated in a developer accommodating portion, includes a shaft for receiving a driving force to rotate when the shaft is mounted in the developer accommodating portion; a flexible sheet for feeding the developer accommodated in the developer accommodating portion when the flexible sheet is mounted in the developer accommodating portion; a mounting member for mounting the flexible sheet on the shaft such that the flexible sheet is movable relative to the shaft in a longitudinal direction, in a widthwise direction and in a thickness direction.Type: GrantFiled: September 27, 2007Date of Patent: August 12, 2008Assignee: Canon Kabushiki KaishaInventors: Masaaki Sato, Shigeo Miyabe, Shinjiro Toba, Hiroomi Matsuzaki
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Publication number: 20080159774Abstract: A process cartridge detachably mountable to a main assembly of the apparatus of an image forming apparatus, the image forming apparatus including a main assembly urging member and a main assembly positioning portion, the cartridge includes a photosensitive drum; a portion-to-be-positioned for positioning the cartridge by engaging with the main assembly positioning portion when the cartridge is mounted to the main assembly of the apparatus; a first portion-to-be-urged for being urged to a first urging portion of the main assembly urging member to urge the portion-to-be-positioned to the main assembly positioning portion when the cartridge is mounted to the main assembly of the apparatus; a second portion-to-be-urged for being urged to a second urging portion of the main assembly urging member to urge the portion-to-be-positioned to the main assembly positioning portion when the cartridge is mounted to the main assembly of the apparatus; a cartridge electrical contact, provided between the first portion-to-be-uType: ApplicationFiled: January 22, 2007Publication date: July 3, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Masato Tanabe, Susumu Nittani, Shinjiro Toba, Tomio Noguchi
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Patent number: 7349657Abstract: A developer feeding member for use with an electrophotographic image forming apparatus to feed a developer accommodated in a developer accommodating portion, includes a shaft for receiving a driving force to rotate when the shaft is mounted in the developer accommodating portion; a flexible sheet for feeding the developer accommodated in the developer accommodating portion when the flexible sheet is mounted in the developer accommodating portion; a mounting member for mounting the flexible sheet on the shaft such that the flexible sheet is movable relative to the shaft in a longitudinal direction, in a widthwise direction and in a thickness direction.Type: GrantFiled: October 31, 2006Date of Patent: March 25, 2008Assignee: Canon Kabushiki KaishaInventors: Masaaki Sato, Shigeo Miyabe, Shinjiro Toba, Hiroomi Matsuzaki
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Publication number: 20080025757Abstract: A developer feeding member for use with an electrophotographic image forming apparatus to feed a developer accommodated in a developer accommodating portion, includes a shaft for receiving a driving force to rotate when the shaft is mounted in the developer accommodating portion; a flexible sheet for feeding the developer accommodated in the developer accommodating portion when the flexible sheet is mounted in the developer accommodating portion; a mounting member for mounting the flexible sheet on the shaft such that flexible sheet is movable relative to the shaft in a longitudinal direction, in a widthwise direction and in a thickness direction.Type: ApplicationFiled: September 27, 2007Publication date: January 31, 2008Applicant: CANON KABUSHIKI KAISHAInventors: Masaaki Sato, Shigeo Miyabe, Shinjiro Toba, Hiroomi Matsuzaki
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Patent number: 7248810Abstract: A cartridge detachably mountable to a mounting portion in a main assembly of an electrophotographic image forming apparatus, includes: a cartridge electrical contact supplying electric power to a process device and being electrically connectable to a main assembly electrical contact when the cartridge is mounted to the mounting portion; first and second portions to be guided by a main assembly guide to guide the cartridge to the mounting portion when the cartridge is mounted to the mounting portion; and a guide portion guiding the main assembly electrical contact to the cartridge electrical contact when the cartridge is mounted to the mounting portion. The guide portion is disposed between the first and second portions to be guided, and the cartridge electrical contact is upstream of the guide portion with respect to a direction in which the cartridge is mounted to the mounting portion.Type: GrantFiled: October 8, 2004Date of Patent: July 24, 2007Assignee: Canon Kabushiki KaishaInventors: Shigeo Miyabe, Shinjiro Toba, Takahito Ueno
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Patent number: D555718Type: GrantFiled: August 2, 2005Date of Patent: November 20, 2007Assignee: Canon Kabushiki KaishaInventors: Shigeo Miyabe, Shinjiro Toba, Takahito Ueno
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Patent number: D631092Type: GrantFiled: December 3, 2008Date of Patent: January 18, 2011Assignee: Canon Kabushiki KaishaInventors: Susumu Nittani, Masatomo Tsuzuki, Shinjiro Toba, Akira Yoshimura