Patents by Inventor Atsuya Takahashi
Atsuya Takahashi 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: 9156641Abstract: Detachable sheet feeding units are connected to an image forming apparatus. A transmitting unit transmits a feeding instruction via a signal line to a sheet feeding unit that is to perform sheet feeding. A first sheet detector, which is placed in the sheet feeding unit, detects a sheet that has been fed from the sheet feeding unit. A second sheet detector is provided downstream of the first sheet detector in terms of the sheet conveyance direction. If the feeding instruction is transmitted and a plurality of sheets are fed from the sheet feeding unit, an image formation controller determines whether to cause the image forming operation to continue or stop based upon whether a sheet-to-sheet interval of a plurality of sheets has been detected by the second sheet detector in a state in which the result of detection by the first sheet detector indicates presence of a sheet.Type: GrantFiled: November 22, 2013Date of Patent: October 13, 2015Assignee: Canon Kabushiki KaishaInventor: Atsuya Takahashi
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Publication number: 20140077451Abstract: Detachable sheet feeding units are connected to an image forming apparatus. A transmitting unit transmits a feeding instruction via a signal line to a sheet feeding unit that is to perform sheet feeding. A first sheet detector, which is placed in the sheet feeding unit, detects a sheet that has been fed from the sheet feeding unit. A second sheet detector is provided downstream of the first sheet detector in terms of the sheet conveyance direction. If the feeding instruction is transmitted and a plurality of sheets are fed from the sheet feeding unit, an image formation controller determines whether to cause the image forming operation to continue or stop based upon whether a sheet-to-sheet interval of a plurality of sheets has been detected by the second sheet detector in a state in which the result of detection by the first sheet detector indicates presence of a sheet.Type: ApplicationFiled: November 22, 2013Publication date: March 20, 2014Applicant: CANON KABUSHIKI KAISHAInventor: Atsuya Takahashi
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Patent number: 8626050Abstract: Detachable sheet feeding units are connected to an image forming apparatus. A transmitting unit transmits a feeding instruction via a signal line to a sheet feeding unit that is to perform sheet feeding. A first sheet detector, which is placed in the sheet feeding unit, detects a sheet that has been fed from the sheet feeding unit. A second sheet detector is provided downstream of the first sheet detector in terms of the sheet conveyance direction. If the feeding instruction is transmitted and a plurality of sheets are fed from the sheet feeding unit, an image formation controller determines whether to cause the image forming operation to continue or stop based upon whether a sheet-to-sheet interval of a plurality of sheets has been detected by the second sheet detector in a state in which the result of detection by the first sheet detector indicates presence of a sheet.Type: GrantFiled: February 19, 2008Date of Patent: January 7, 2014Assignee: Canon Kabushiki KaishaInventor: Atsuya Takahashi
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Patent number: 8544844Abstract: An image forming system including an image forming apparatus and a sheet feeding apparatus. The system includes: a first conveying unit conveying to the image forming apparatus a recording material; a second conveying unit conveying to an image forming unit of the image forming apparatus the recording material; a detector detecting a recording material type while the second conveying unit halts conveying the recording material; a first controller, based on detection by the detector, determining a speed for conveying the recording material to the image forming unit, and conveying the recording material at the conveying speed; and a second controller controlling recording material conveying speeds of the first conveying unit. Before the recording material reaches the second conveying unit, the second controller maintains a first conveying speed, and after the recording material reaches the second convey unit, maintains a second conveying speed determined by the first control unit.Type: GrantFiled: August 24, 2010Date of Patent: October 1, 2013Assignee: Canon Kabushiki KaishaInventors: Ryuichi Yoshizawa, Atsuya Takahashi, Akihiro Nakamura, Tadashi Okanishi, Kazuhisa Maruyama, Kaoru Sato
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Patent number: 8531695Abstract: There is provided an image forming system that automatically discharges paper sheets other than poorly fed ones without making an emergency stop, even when poor paper feeding is caused due to a paper jam or the like. At paper feeding, information showing poor paper feeding is transmitted when the poor paper feeding is detected in supplying the paper sheets. At image forming, a determination is made whether the paper conveyance in forming the image is continued or stopped when an instruction, based on the information showing the poor paper feeding. At paper discharging, a determination is made whether the paper conveyance in discharging the paper sheets is continued or stopped when an instruction, based on the information showing the defective conveyance.Type: GrantFiled: January 27, 2011Date of Patent: September 10, 2013Assignee: Canon Kabushiki KaishaInventors: Akihiro Nakamura, Atsuya Takahashi, Kaoru Sato, Ryuichi Yoshizawa, Kazuhisa Maruyama
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Patent number: 8353507Abstract: Occurrence of improper sheet-feeding of sheets is reduced. A sheet stacking section is lifted by an amount that is larger when a sheet-feed retry is performed than when an ordinary lifting operation is performed.Type: GrantFiled: October 28, 2010Date of Patent: January 15, 2013Assignee: Canon Kabushiki KaishaInventors: Hiroshi Chihara, Atsuya Takahashi
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Patent number: 8342514Abstract: 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: June 10, 2010Date of Patent: January 1, 2013Assignee: 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: 20110274454Abstract: An image forming apparatus to which a paper handling unit is connected thereto is provided. The image forming apparatus detects the size of a sheet in a direction in which the sheet is conveyed for image formation. The image forming apparatus outputs sheet size mismatch information indicating that the size of the sheet does not match a predetermined size to the paper handling unit before a size detecting operation thereof has been completed detecting the trailing edge of the sheet is greater than the predetermined size.Type: ApplicationFiled: July 19, 2011Publication date: November 10, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Eiichiro Teshima, Tatsuto Tachibana, Ryuichi Yoshizawa, Kazuhisa Maruyama, Atsuya Takahashi, Akihiro Nakamura, Kaoru Sato
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Patent number: 8054475Abstract: Provided is an image forming system that suppresses an increase in number of signal lines between an image forming apparatus and optional units, curtails communication time period and alleviates communication load. To accomplish this, an image forming system includes an image forming apparatus and one or more optional units removably attached to the image forming apparatus. The image forming apparatus transmits a specifying command and an instruction command to all of the optional units by outputting the commands on a single common signal line. Each optional unit outputs acknowledgement status on a single common signal line in a case where an identifier appended to the instruction command is the same as an acquired identifier. If the identifiers are different, on the other hand, each optional unit outputs a value indicating whether it itself is currently performing an operation in response to acknowledgement status transmitted by another optional unit.Type: GrantFiled: August 6, 2007Date of Patent: November 8, 2011Assignee: Canon Kabushiki KaishaInventor: Atsuya Takahashi
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Patent number: 8000616Abstract: An image forming apparatus to which a paper handling unit is connected thereto is provided. The image forming apparatus detects the size of a sheet in a direction in which the sheet is conveyed for image formation. The image forming apparatus outputs sheet size mismatch information indicating that the size of the sheet does not match a predetermined size to the paper handling unit before a size detecting operation thereof has been completed detecting the trailing edge of the sheet is greater than the predetermined size.Type: GrantFiled: June 7, 2007Date of Patent: August 16, 2011Assignee: Canon Kabushiki KaishaInventors: Eiichiro Teshima, Tatsuto Tachibana, Ryuichi Yoshizawa, Kazuhisa Maruyama, Atsuya Takahashi, Akihiro Nakamura, Kaoru Sato
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Publication number: 20110116121Abstract: There is provided an image forming system that automatically discharges paper sheets other than poorly fed ones without making an emergency stop, even when poor paper feeding is caused due to a paper jam or the like. At paper feeding, information showing poor paper feeding is transmitted when the poor paper feeding is detected in supplying the paper sheets. At image forming, a determination is made whether the paper conveyance in forming the image is continued or stopped when an instruction, based on the information showing the poor paper feeding. At paper discharging, a determination is made whether the paper conveyance in discharging the paper sheets is continued or stopped when an instruction, based on the information showing the defective conveyance.Type: ApplicationFiled: January 27, 2011Publication date: May 19, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Akihiro NAKAMURA, Atsuya TAKAHASHI, Kaoru SATO, Ryuichi YOSHIZAWA, Kazuhisa MARUYAMA
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Publication number: 20110101600Abstract: Occurrence of improper sheet-feeding of sheets is reduced. A sheet stacking section is lifted by an amount that is larger when a sheet-feed retry is performed than when an ordinary lifting operation is performed.Type: ApplicationFiled: October 28, 2010Publication date: May 5, 2011Applicant: CANON KABUSHIKI KAISHAInventors: Hiroshi Chihara, Atsuya Takahashi
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Patent number: 7916318Abstract: There is provided an image forming system that automatically discharges paper sheets other than poorly fed ones without making an emergency stop, even when poor paper feeding is caused due to a paper jam or the like. At paper feeding, information showing poor paper feeding is transmitted when the poor paper feeding is detected in supplying the paper sheets. At image forming, a determination is made whether the paper conveyance in forming the image is continued or stopped when an instruction, based on the information showing the poor paper feeding. At paper discharging, a determination is made whether the paper conveyance in discharging the paper sheets is continued or stopped when an instruction, based on the information showing the defective conveyance.Type: GrantFiled: May 8, 2006Date of Patent: March 29, 2011Assignee: Canon Kabushiki KaishaInventors: Akihiro Nakamura, Atsuya Takahashi, Kaoru Sato, Ryuichi Yoshizawa, Kazuhisa Maruyama
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Publication number: 20100314824Abstract: An image forming system including an image forming apparatus and a sheet feeding apparatus. The system includes: a first conveying unit conveying to the image forming apparatus a recording material; a second conveying unit conveying to an image forming unit of the image forming apparatus the recording material; a detector detecting a recording material type while the second conveying unit halts conveying the recording material; a first controller, based on detection by the detector, determining a speed for conveying the recording material to the image forming unit, and conveying the recording material at the conveying speed; and a second controller controlling recording material conveying speeds of the first conveying unit. Before the recording material reaches the second conveying unit, the second controller maintains a first conveying speed, and after the recording material reaches the second convey unit, maintains a second conveying speed determined by the first control unit.Type: ApplicationFiled: August 24, 2010Publication date: December 16, 2010Applicant: CANON KABUSHIKI KAISHAInventors: Ryuichi Yoshizawa, Atsuya Takahashi, Akihiro Nakamura, Tadashi Okanishi, Kazuhisa Maruyama, Kaoru Sato
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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: 7802791Abstract: An image forming system including an image forming apparatus and a sheet feeding apparatus. The system includes: a first conveying unit conveying to the image forming apparatus a recording material; a second conveying unit conveying to an image forming unit of the image forming apparatus the recording material; a detector detecting a recording material type while the second conveying unit halts conveying the recording material; a first controller, based on detection by the detector, determining a speed for conveying the recording material to the image forming unit, and conveying the recording material at the conveying speed; and a second controller controlling recording material conveying speeds of the first conveying unit. Before the recording material reaches the second conveying unit, the second controller maintains a first conveying speed, and after the recording material reaches the second convey unit, maintains a second conveying speed determined by the first control unit.Type: GrantFiled: April 21, 2006Date of Patent: September 28, 2010Assignee: Canon Kabushiki KaishaInventors: Ryuichi Yoshizawa, Atsuya Takahashi, Akihiro Nakamura, Tadashi Okanishi, Kazuhisa Maruyama, Kaoru Sato
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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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Patent number: 7729005Abstract: An engine control section detects that a sheet in a cassette is exhausted during duplex image formation. If a sheet with its first surface being printed is on standby in a duplexer, an image formation timing signal is output for a first surface of a sheet not fed because of a paper-out. Subsequently, an image formation timing signal is output for a second surface of the sheet that is in the duplexer and has its first surface printed. After completing the image formation of the second surface of the sheet, the operation is halted.Type: GrantFiled: December 7, 2005Date of Patent: June 1, 2010Assignee: Canon Kabushiki KaishaInventors: Tadashi Okanishi, Kazuhisa Maruyama, Ryuichi Yoshizawa, Akihiro Nakamura, Atsuya Takahashi
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Patent number: 7644905Abstract: A method and apparatus including an easily installed spiral support useful laying a cable. The spiral support is composed of a counterclockwise spiral portion and a clockwise spiral portion, both of which are connected to each other with a reverse portion therebetween. The spiral support is installed on a messenger wire in such a way that the reverse portion is fitted on the messenger wire; the spiral support is rotated counterclockwise or clockwise; and these steps are repeated.Type: GrantFiled: June 22, 2006Date of Patent: January 12, 2010Assignees: Fujikura Ltd., Nippon Telegraph and Telephone West Corporation, Nippon Telegraph and Telephone East Corporation, Kyoei High Opt Co., Ltd.Inventors: Kazuya Ogata, Hidenori Fukumoto, Atsuya Takahashi, Masahiro Shibata
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Patent number: 7595912Abstract: At step S301, since none of conveyance sensors 114, 116 and 121 detect residual paper, a CPU 203 notifies a CPU 201 that it is in a residual paper check start instruction waiting mode. At step S302, since a conveying path sensor 111 in an optional paper feed unit 101 does not detect residual paper, the CPU 202 notifies the CPU 201 that it is in a residual paper check start instruction waiting mode. At step S303, since an inlet sensor 122 of an optional paper output unit 103 does not detect residual paper, the CPU 204 notifies the CPU 201 that it is in a residual paper check start instruction waiting mode. After confirming that all the units are in the waiting mode, the CPU 201 issues a residual paper check start instruction to all the units simultaneously to improve usability by reducing initializing time.Type: GrantFiled: May 8, 2006Date of Patent: September 29, 2009Assignee: Canon Kabusihiki KaishaInventors: Atsuya Takahashi, Akihiro Nakamura, Kaoru Sato, Kazuhisa Maruyama, Ryuichi Yoshizawa