Patents by Inventor Kazushi Nishikata
Kazushi Nishikata 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: 20120001386Abstract: An image forming apparatus includes a main body, a sheet conveyance apparatus, and a control unit. The main body includes an image forming unit to form an image on a sheet. The sheet conveyance apparatus and the main body are detachable from each other and the sheet conveyance apparatus may convey the sheet to the image forming unit. The sheet conveyance apparatus includes a sheet conveyance path through which the sheet passes and a detection unit. The detection unit includes light emitting and receiving units that transmit light across the sheet conveyance path therebetween. The detection unit detects a reference and an edge position of the conveyed sheet in a width direction of the sheet orthogonal to a sheet conveyance direction. The control unit determines a position of the sheet based on detections of the reference and the edge position of the conveyed sheet by the detection unit.Type: ApplicationFiled: June 16, 2011Publication date: January 5, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Kazushi Nishikata, Yoji Misao, Satoshi Koga, Kazunari Nishimoto
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Publication number: 20110227274Abstract: A sheet processing apparatus includes an opening/closing member which is turnably supported by an apparatus body and through which a user accesses the apparatus, and a conveying guide which is movably supported by a user access door and which includes a sheet conveying surface. When the opening/closing member is opened in a state where a sheet remains on the sheet conveying surface, the conveying guide is separated from the opening/closing member by the remaining sheet.Type: ApplicationFiled: June 1, 2011Publication date: September 22, 2011Applicant: CANON KABUSHIKI KAISHAInventors: KAZUSHI NISHIKATA, SHUJI NISHITANI
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Patent number: 7979002Abstract: A sheet processing apparatus includes an opening/closing member which is turnably supported by an apparatus body and through which a user accesses the apparatus, and a conveying guide which is movably supported by a user access door and which includes a sheet conveying surface. When the opening/closing member is opened in a state where a sheet remains on the sheet conveying surface, the conveying guide is separated from the opening/closing member by the remaining sheet.Type: GrantFiled: December 17, 2008Date of Patent: July 12, 2011Assignee: Canon Kabushiki KaishaInventors: Kazushi Nishikata, Shuji Nishitani
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Publication number: 20110140341Abstract: A sheet feeding apparatus includes a sheet accommodating unit which is detachably attached to an apparatus main body and configured to accommodate sheets, a sheet stacking unit which is provided in the sheet accommodating unit and can move while supporting the sheet, a sheet feeding unit configured to feed the sheet stacked on the sheet stacking unit, and a lift unit configured to move the sheet stacking unit toward the sheet feeding unit, wherein, before feeding of the sheet stacked on the sheet stacking unit by the sheet feeding unit, the lift unit increases and then reduces press contact force between the sheet stacked on the sheet stacking unit and the sheet feeding unit.Type: ApplicationFiled: December 7, 2010Publication date: June 16, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Kazushi Nishikata, Shinichi Ueda, Satoshi Tsuda
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Publication number: 20110140355Abstract: The detachment of a feed roller rotatably supported by a holding portion provided in the main body of an apparatus, and held detachably in the axial direction thereof is restricted by a locking device. The locking device is made movable to a lock position and a lock releasing position for permitting the detachment of the feed roller. Further, when the locking device is in the lock releasing position when a sheet stacking portion is mounted, the locking device is moved to the lock position by a position changeover device in operative association with the mounting operation of the sheet stacking portion.Type: ApplicationFiled: February 24, 2011Publication date: June 16, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Kazushi Nishikata, Hisayuki Tomura, Akio Nemoto, Kei Sawanaka, Masato Suzuki, Yasuyoshi Hayakawa
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Patent number: 7913996Abstract: The detachment of a feed roller rotatably supported by a holding portion provided in the main body of an apparatus, and held detachably in the axial direction thereof is restricted by a locking device. The locking device is made movable to a lock position and a lock releasing position for permitting the detachment of the feed roller. Further, when the locking device is in the lock releasing position when a sheet stacking portion is mounted, the locking device is moved to the lock position by a position changeover device in operative association with the mounting operation of the sheet stacking portion.Type: GrantFiled: December 7, 2006Date of Patent: March 29, 2011Assignee: Canon Kabushiki KaishaInventors: Kazushi Nishikata, Hisayuki Tomura, Akio Nemoto, Kei Sawanaka, Masato Suzuki, Yasuyoshi Hayakawa
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Publication number: 20110031680Abstract: A controller sets a pressure-contact time from memory in accordance with rigidity of a sheet and starts a feeding operation of a sheet by causing a feeding roller to be pressure contacted with sheets on a sheet stacking plate. The controller controls the feeding roller to be separated from the sheets on the sheet stacking plate after passage of the pressure-contact time. In this way, it is possible to set the optimum pressure-contact time at the time of feeding sheets in accordance with the kind of sheet being fed and realize a stable feeding operation. Since the controller controls a driving unit based on a detection signal of a sheet-surface detecting flag that detects the height of the uppermost surface of a sheet bundle, it is possible to realize the stabilization and acceleration of a contacting operation.Type: ApplicationFiled: July 30, 2010Publication date: February 10, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Henrique Massanori Oka, Kazushi Nishikata, Kei Sawanaka
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Publication number: 20110024978Abstract: Provided is an image forming apparatus, which includes: a pressing lever and a pressing arm for pushing up a sheet stacking plate so that sheets stacked on the sheet stacking plate are brought into pressure contact with a sheet feeding portion; a lifter driving mechanism for driving the pressing lever and the pressing arm; and a setting mechanism disposed between the pressing lever and the pressing arm, and the lifter driving mechanism. The setting mechanism is capable of setting a pressure contact force for bringing the sheets stacked on the sheet stacking plate into pressure contact with the sheet feeding portion, to be appropriate for a size of the sheets to be stacked and an amount of the sheets to be stacked.Type: ApplicationFiled: July 14, 2010Publication date: February 3, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Kazushi Nishikata, Shinichi Ueda
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Publication number: 20100244365Abstract: Sheets fed out from a sheet feeding portion, which is brought into pressure contact with the sheets by the upward movement of a sheet stacking portion to feed out the sheets, are separated and conveyed one by one while being upwardly curved. During the sheet feeding operation, the sheet stacking portion is sequentially moved up, and when the sheet feeding operation is completed, the sheet stacking portion is moved down. Further, a remaining amount indicating member moved with the upward movement of the sheet stacking portion to indicate the remaining amount of sheets is held at a position before the sheet stacking portion is moved down, by a holding mechanism, when the sheet feeding operation is completed and the sheet stacking portion is moved down.Type: ApplicationFiled: June 10, 2010Publication date: September 30, 2010Applicant: CANON KABUSHIKI KAISHAInventors: HISAYUKI TOMURA, KEI SAWANAKA, AKIO NEMOTO, KAZUSHI NISHIKATA, MASATO SUZUKI, ATSUYA TAKAHASHI, SHOTARO YOSHIMURA, MITSUNARI ITO
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Patent number: 7758042Abstract: Sheets fed out from a sheet feeding portion, which is brought into pressure contact with the sheets by the upward movement of a sheet stacking portion to feed out the sheets, are separated and conveyed one by one while being upwardly curved. During the sheet feeding operation, the sheet stacking portion is sequentially moved up, and when the sheet feeding operation is completed, the sheet stacking portion is moved down. Further, a remaining amount indicating member moved with the upward movement of the sheet stacking portion to indicate the remaining amount of sheets is held at a position before the sheet stacking portion is moved down, by a holding mechanism, when the sheet feeding operation is completed and the sheet stacking portion is moved down.Type: GrantFiled: January 17, 2007Date of Patent: July 20, 2010Assignee: Canon Kabushiki KaishaInventors: Hisayuki Tomura, Kei Sawanaka, Akio Nemoto, Kazushi Nishikata, Masato Suzuki, Atsuya Takahashi, Shotaro Yoshimura, Mitsunari Ito
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Publication number: 20090166966Abstract: A sheet processing apparatus includes an opening/closing member which is turnably supported by an apparatus body and through which a user accesses the apparatus, and a conveying guide which is movably supported by a user access door and which includes a sheet conveying surface. When the opening/closing member is opened in a state where a sheet remains on the sheet conveying surface, the conveying guide is separated from the opening/closing member by the remaining sheet.Type: ApplicationFiled: December 17, 2008Publication date: July 2, 2009Applicant: CANON KABUSHIKI KAISHAInventors: Kazushi Nishikata, Shuji Nishitani
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Publication number: 20070182088Abstract: Sheets fed out from a sheet feeding portion, which is brought into pressure contact with the sheets by the upward movement of a sheet stacking portion to feed out the sheets, are separated and conveyed one by one while being upwardly curved. During the sheet feeding operation, the sheet stacking portion is sequentially moved up, and when the sheet feeding operation is completed, the sheet stacking portion is moved down. Further, a remaining amount indicating member moved with the upward movement of the sheet stacking portion to indicate the remaining amount of sheets is held at a position before the sheet stacking portion is moved down, by a holding mechanism, when the sheet feeding operation is completed and the sheet stacking portion is moved down.Type: ApplicationFiled: January 17, 2007Publication date: August 9, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Hisayuki Tomura, Kei Sawanaka, Akio Nemoto, Kazushi Nishikata, Masato Suzuki, Atsuya Takahashi, Shotaro Yoshimura, Mitsunari Ito
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Publication number: 20070145666Abstract: The detachment of a feed roller rotatably supported by a holding portion provided in the main body of an apparatus, and held detachably in the axial direction thereof is restricted by a locking device. The locking device is made movable to a lock position and a lock releasing position for permitting the detachment of the feed roller. Further, when the locking device is in the lock releasing position when a sheet stacking portion is mounted, the locking device is moved to the lock position by a position changeover device in operative association with the mounting operation of the sheet stacking portion.Type: ApplicationFiled: December 7, 2006Publication date: June 28, 2007Applicant: CANON KABUSHIKI KAISHAInventors: Kazushi Nishikata, Hisayuki Tomura, Akio Nemoto, Kei Sawanaka, Masato Suzuki, Yasuyoshi Hayakawa
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Publication number: 20060237895Abstract: A sheet feeding apparatus including: a separating roller which abuts against a feed roller and is rotated in association with the feed roller; and a torque-limiter for allowing the separating roller to rotate in association with the feed roller when a rotation torque larger than a predetermined torque is acted on the separating roller and for preventing the separating roller from rotating in association with the feed roller when the rotation torque equal to or smaller than the predetermined torque is acted on the separating roller, in which sheets fed from a sheet feed cassette are separated one by one by the feed roller and the separating roller, the separating roller urged against the feed roller is supported by a guide member in a slidable manner, and the separating roller is guided with a predetermined angle in a direction different from a direction in which the feed roller is opposed to the separating roller.Type: ApplicationFiled: April 19, 2006Publication date: October 26, 2006Applicant: CANON KABUSHIKI KAISHAInventors: Kazushi Nishikata, Masato Suzuki, Fumimitsu Kishimoto, Akio Nemoto, Hisayuki Tomura, Kei Sawanaka, Yasuyoshi Hayakawa
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Patent number: 7032900Abstract: A document feeding apparatus in which the vibration of a document by the shock when the trailing edge of the document has passed an ante-reading roller is prevented to thereby prevent the misregister or distortion of a read image.Type: GrantFiled: January 5, 2005Date of Patent: April 25, 2006Assignee: Canon Kabushiki KaishaInventors: Kazushi Nishikata, Hiroaki Namiki, Makoto Izumi
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Publication number: 20050152723Abstract: A document feeding apparatus in which the vibration of a document by the shock when the trailing edge of the document has passed an ante-reading roller is prevented to thereby prevent the misregister or distortion of a read image.Type: ApplicationFiled: January 5, 2005Publication date: July 14, 2005Applicant: CANON KABUSHIKI KAISHAInventors: Kazushi Nishikata, Hiroaki Namiki, Makoto Izumi
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Patent number: 6877742Abstract: A document feeding apparatus in which the vibration of a document by the shock when the trailing edge of the document has passed an ante-reading roller is prevented to thereby prevent the misregister or distortion of a read image.Type: GrantFiled: January 22, 2003Date of Patent: April 12, 2005Assignee: Canon Kabushiki KaishaInventors: Kazushi Nishikata, Hiroaki Namiki, Makoto Izumi
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Publication number: 20030141654Abstract: A document feeding apparatus in which the vibration of a document by the shock when the trailing edge of the document has passed an ante-reading roller is prevented to thereby prevent the misregister or distortion of a read image.Type: ApplicationFiled: January 22, 2003Publication date: July 31, 2003Applicant: Canon Kabushiki KaishaInventors: Kazushi Nishikata, Hiroaki Namiki, Makoto Izumi