Patents by Inventor Kozo Tagawa
Kozo Tagawa 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: 10162296Abstract: A transport monitoring control device includes a pair of rollers configured to transport a recording medium while nipping the recording medium therebetween, the pair of rollers having circumferential surfaces coming in contact with the recording medium, the circumferential surfaces being different from each other in hardness, a driving unit configured to drive the pair of rollers, a detector configured to detect waveforms related to a load of the driving unit, an extractor configured to extract a peak waveform having an extreme point temporarily exceeding a predetermined threshold value, from among the waveforms detected by the detector, and a determining unit configured to determine whether multi-feed of the recording medium is present, based on the number of peak waveforms extracted by the extractor.Type: GrantFiled: March 21, 2017Date of Patent: December 25, 2018Assignee: FUJI XEROX CO., LTD.Inventors: Hideki Moriya, Hidehiko Yamaguchi, Kozo Tagawa, Tsuyoshi Sunohara
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Publication number: 20180046124Abstract: A transport monitoring control device includes a pair of rollers configured to transport a recording medium while nipping the recording medium therebetween, the pair of rollers having circumferential surfaces coming in contact with the recording medium, the circumferential surfaces being different from each other in hardness, a driving unit configured to drive the pair of rollers, a detector configured to detect waveforms related to a load of the driving unit, an extractor configured to extract a peak waveform having an extreme point temporarily exceeding a predetermined threshold value, from among the waveforms detected by the detector, and a determining unit configured to determine whether multi-feed of the recording medium is present, based on the number of peak waveforms extracted by the extractor.Type: ApplicationFiled: March 21, 2017Publication date: February 15, 2018Applicant: FUJI XEROX CO., LTD.Inventors: Hideki MORIYA, Hidehiko YAMAGUCHI, Kozo TAGAWA, Tsuyoshi SUNOHARA
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Patent number: 9857750Abstract: A transport monitoring control device includes a transport unit configured to transport a recording medium while nipping the recording medium, a driving unit configured to drive the transport unit, a detector configured to detect a waveform related to a load of the driving unit when the recording medium enters the transport unit or is discharged from the transport unit, and a determining unit configured to determine whether the recording medium is skewed with respect to the transport unit, based on a waveform width at a height obtained by multiplying a peak value of the waveform by a predetermined coefficient.Type: GrantFiled: March 27, 2017Date of Patent: January 2, 2018Assignee: FUJI XEROX CO., LTD.Inventors: Hideki Moriya, Hidehiko Yamaguchi, Kozo Tagawa, Tsuyoshi Sunohara
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Patent number: 8983074Abstract: An input content data managing system, includes a first electronic storing apparatus that stores encoded content data generated by encoding content data with a cryptographic key; a electronic second storing apparatus that stores the cryptographic key with corresponding digest-value data of the encoded content data capable of identifying sameness of the encoded content data; a matching unit that determines a matched cryptographic key stored in the second storing apparatus for the encoded content data stored in the first storing apparatus, the matching using, as a matching key, at a predetermined time, digest-value data of the encoded content data obtained from the encoded content data stored in the first storing apparatus to match with the digest-value data of the encoded content data stored in the second storing apparatus, in order to obtain the content data by decoding the encoded content data using the matched cryptographic key.Type: GrantFiled: June 26, 2012Date of Patent: March 17, 2015Assignee: Quad, Inc.Inventor: Kozo Tagawa
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Patent number: 8452196Abstract: A device for measuring a length of a recoding material, includes: a rotating body that rotates in contact with a recording material which is transported; a length measuring unit that measures a length of the recording material based on a rotation of the rotating unit; a detecting unit that detects at least one of a rotation and an oblique advance of the recording material; and a correcting unit that corrects a value measured by the length measuring unit based on an output of the detecting unit.Type: GrantFiled: March 11, 2010Date of Patent: May 28, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Toshiyuki Kazama, Koji Morofuji, Takeshi Kato, Kozo Tagawa
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Patent number: 8391770Abstract: A measuring device of a length of a recording material includes: a rotary unit that rotates while coming into contact with the recording material; a pulse signal output unit that outputs a pulse signal in response to a rotation angle of the rotary unit; first and second detection units that detect the recording material; and a calculation unit that calculates a length of the recording material. The calculation unit calculates a piece of the length of the recording material corresponding to a time below pulse interval of the pulse signal and then calculates the total length in the transport direction of the recording material.Type: GrantFiled: February 22, 2010Date of Patent: March 5, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Koji Morofuji, Takeshi Kato, Toshiyuki Kazama, Kozo Tagawa
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Publication number: 20120328104Abstract: An input content data managing system, includes a first storing unit that stores encoded content data generated by encoding content data with a cryptographic key; a second storing unit that stores the cryptographic key with reference value data of the encoded content data capable of identifying sameness of the encoded content data in corresponded with each other; a matching unit that matches the encoded content data stored in the first storing unit and the cryptographic key stored in the second storing unit using reference value data of the encoded content data obtained from the encoded content data stored in the first storing unit and the reference value data of the encoded content data stored in the second storing unit as a matching key at a predetermined time to obtain the content data by decoding the encoded content data by the matched cryptographic key.Type: ApplicationFiled: June 26, 2012Publication date: December 27, 2012Inventor: Kozo Tagawa
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Patent number: 8320804Abstract: The image forming apparatus is provided with: a toner image carrying member that moves while carrying a toner image; a transferring member that transfers, on a recording medium, the toner image that the toner image carrying member carries; a transporting unit that transports the recording medium along a transport path that passes through a transfer region where the transferring member transfers the toner image onto the recording medium; and a controller that controls a movement speed of the toner image carrying member. The controller changes the movement speed of the toner image carrying member in accordance with a position, on the transport path, of the recording medium that the transporting unit transports.Type: GrantFiled: November 18, 2008Date of Patent: November 27, 2012Assignee: Fuji Xerox Co., Ltd.Inventors: Tsutomu Udaka, Kozo Tagawa, Naoto Nishi, Yoshiki Matsuzaki, Shun Yashima
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Publication number: 20120095811Abstract: Disclosed is an electronic voting system in which a polling administration unit, upon receiving encoded vote content data encoded by a temporary key from a voting unit, generates a reference value capable of identifying sameness of the encoded vote content data and sends it to a voter list administration unit, the voter list administration unit receives the temporary key, the reference value of the encoded vote content data, and voter identification data for identifying a voter from the voting unit, determines that a vote is valid when the reference value received from the voting unit and the reference value received from the polling administration unit match as well as a voter identified by the voter identification data is qualified by voter list data.Type: ApplicationFiled: October 19, 2010Publication date: April 19, 2012Inventor: Kozo Tagawa
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Publication number: 20110076077Abstract: A measuring device of a length of a recording material includes: a rotary unit that rotates while coming into contact with the recording material; a pulse signal output unit that outputs a pulse signal in response to a rotation angle of the rotary unit; first and second detection unit that detect the recording material; and a calculation unit that calculates a length of the recording material. The calculation unit calculates a peace of the length of the recording material corresponding to a time below pulse interval of the pulse signal and then calculates the total length in the transport direction of the recording material.Type: ApplicationFiled: February 22, 2010Publication date: March 31, 2011Applicant: FUJI XEROX CO., LTD.Inventors: Koji MOROFUJI, Takeshi KATO, Toshiyuki KAZAMA, Kozo TAGAWA
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Publication number: 20110064425Abstract: A device for measuring a length of a recoding material, includes: a rotating body that rotates in contact with a recording material which is transported; a length measuring unit that measures a length of the recording material based on a rotation of the rotating unit; a detecting unit that detects at least one of a rotation and an oblique advance of the recording material; and a correcting unit that corrects a value measured by the length measuring unit based on an output of the detecting unit.Type: ApplicationFiled: March 11, 2010Publication date: March 17, 2011Applicant: FUJI XEROX CO., LTD.Inventors: Toshiyuki KAZAMA, Koji MOROFUJI, Takeshi KATO, Kozo TAGAWA
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Publication number: 20100247115Abstract: An apparatus for measuring a length of a recording material, includes: a rotating member that rotates while contacting a conveyed recording material; a detecting section that detects a rotation amount of the rotating member; an information obtaining section that obtains at least one of information of an image formed on the recording material and information of the recording material; and a calculating section that calculates a length of the recording material in a direction of the conveyance, based on an output from the detecting section and the information obtained by the information obtaining section.Type: ApplicationFiled: August 25, 2009Publication date: September 30, 2010Applicant: FUJI XEROX CO., LTD.Inventors: Minoru OHSHIMA, Yoshinari IWAKI, Kazuyuki TSUKAMOTO, Takao FURUYA, Kozo TAGAWA, Takeshi KATO, Koji MOROFUJI, Toshiyuki KAZAMA
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Patent number: 7663654Abstract: An image-forming device which is equipped with an image-holding member, an exposure section provided with plural light-emitting portions arranged in a first direction, a movement section that relatively moves the exposure section and the image-holding member in a second direction that intersects with the first direction, and a light-emission control section. The light-emission control section causes the plural light-emitting portions to periodically emit light in accordance with image data representing an image that is to be formed on the image-holding member, to form the image on the image-holding member. The light-emission control section varies a light-emission period during formation of the image, so as to correct for periodic fluctuations within the image of at least one of density and magnification ratio in the second direction.Type: GrantFiled: July 7, 2006Date of Patent: February 16, 2010Assignee: Fuji Xerox Co., Ltd.Inventors: Yasuhiro Arai, Kenji Koizumi, Kazuhiro Hama, Toshio Hisamura, Toshiki Matsui, Kozo Tagawa, Yoshiki Matsuzaki, Ryo Ando, Tsutomu Udaka
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Publication number: 20090324305Abstract: The image forming apparatus is provided with: a toner image carrying member that moves while carrying a toner image; a transferring member that transfers, on a recording medium, the toner image that the toner image carrying member carries; a transporting unit that transports the recording medium along a transport path that passes through a transfer region where the transferring member transfers the toner image onto the recording medium; and a controller that controls a movement speed of the toner image carrying member. The controller changes the movement speed of the toner image carrying member in accordance with a position, on the transport path, of the recording medium that the transporting unit transports.Type: ApplicationFiled: November 18, 2008Publication date: December 31, 2009Inventors: Tsutomu Udaka, Kozo Tagawa, Naoto Nishi, Yoshiki Matsuzaki, Shun Yashima
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Publication number: 20070242995Abstract: An electrophotographic printing apparatus comprises a paper-conveying device conveying a continuous paper sheet in a definite conveyance direction, a plurality of photoreceptors disposed downstream from the paper-conveying device at regular intervals in the conveyance direction of the continuous paper sheet, and one or more idler rollers that are disposed between the paper-conveying device and the most upstream photoreceptor and that rotate passively while contacting the continuous paper sheet wrapping around the rollers. The idler roller that the continuous paper sheet is in contact with at the largest wrap angle has a circumference that is equal to the whole or a fractional length of the interval between the axes of two adjacent photoreceptors.Type: ApplicationFiled: June 12, 2007Publication date: October 18, 2007Applicant: FUJI XEROX CO., LTD.Inventors: Kenichi Kobayashi, Kozo Tagawa
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Publication number: 20070242996Abstract: An electrophotographic printing apparatus comprises a paper-conveying device conveying a continuous paper sheet in a definite conveyance direction, a plurality of photoreceptors disposed downstream from the paper-conveying device at regular intervals in the conveyance direction of the continuous paper sheet, and one or more idler rollers that are disposed between the paper-conveying device and the most upstream photoreceptor and that rotate passively while contacting the continuous paper sheet wrapping around the rollers. The idler roller that the continuous paper sheet is in contact with at the largest wrap angle has a circumference that is equal to the whole or a fractional length of the interval between the axes of two adjacent photoreceptors.Type: ApplicationFiled: June 12, 2007Publication date: October 18, 2007Applicant: FUJI XEROX CO., LTD.Inventors: Kenichi Kobayashi, Kozo Tagawa
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Publication number: 20070120939Abstract: An image-forming device which is equipped with an image-holding member, an exposure section provided with plural light-emitting portions arranged in a first direction, a movement section that relatively moves the exposure section and the image-holding member in a second direction that intersects with the first direction, and a light-emission control section. The light-emission control section causes the plural light-emitting portions to periodically emit light in accordance with image data representing an image that is to be formed on the image-holding member, to form the image on the image-holding member. The light-emission control section varies a light-emission period during formation of the image, so as to correct for periodic fluctuations within the image of at least one of density and magnification ratio in the second direction.Type: ApplicationFiled: July 7, 2006Publication date: May 31, 2007Inventors: Yasuhiro Arai, Kenji Koizumi, Kazuhiro Hama, Toshio Hisamura, Toshiki Matsui, Kozo Tagawa, Yoshiki Matsuzaki, Ryo Ando, Tsutomu Udaka
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Publication number: 20070115339Abstract: An image forming device includes a rotating polygon mirror and a correcting component that corrects misregistration of an image region in a predetermined direction. The correcting component carries out the correction by correcting image data used in modulating light beams reflected and deflected by any one reflecting surface among plural reflecting surfaces provided at the rotating polygon mirror, where the light beams scann a body-to-be-illuminated in the predetermined direction, correcting image data by each data unit used in modulating light beams which are reflected and deflected at the same reflecting surface, and correcting image data in accordance with a misregistration amount in the predetermined direction of the image region formed on the body-to-be-illuminated by the light beams which are reflected and deflected, where the misregistration amount is measured in advance for each reflecting surface of the rotating polygon mirror.Type: ApplicationFiled: July 13, 2006Publication date: May 24, 2007Inventors: Yoshiki Matsuzaki, Ryo Ando, Kozo Tagawa, Tsutomu Udaka, Kenji Koizumi, Toshiki Matsui, Toshio Hisamura, Yasuhiro Arai, Kazuhiro Hama, Hiroshi Ono, Hideki Kashimura, Kohei Shioya
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Patent number: 7216948Abstract: An image forming apparatus has: a recording head having plural unit recording heads divided in a direction orthogonal to a moving direction of a recording medium; a detecting section detecting at least offset of an image recorded by a vicinity of an end portion, in the direction orthogonal to the moving direction of the recording medium, of the plural unit recording heads; and a correcting section correcting recording offset of the recording head on the basis of results of detection of the detecting section.Type: GrantFiled: July 30, 2004Date of Patent: May 15, 2007Assignee: Fuji Xerox Co., Ltd.Inventors: Yoshiki Matsuzaki, Kozo Tagawa, Ryo Ando, Takeshi Kato, Tsutomu Udaka, Toshiyuki Kazama, Osamu Goto, Kenichi Kawauchi
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Patent number: 7144097Abstract: Provided is an inkjet recording device that has a conveying unit for conveying a recording medium, plural recording head groups each structured by plural unit heads disposed along the conveying direction, and an ink receiving unit for receiving ink discharged from the unit heads. The recording head groups, correspond respectively to plural individual recording regions which are sectioned off in the recording medium transverse direction which is orthogonal to the conveying direction, are disposed so as to be at respectively different positions at adjacent individual recording regions along the conveying direction. The ink receiving unit is disposed so as to face ink drop discharging surfaces of the unit heads. The conveying unit is plural conveying belts disposed at positions evading trajectories of the ink drops from the unit heads as seen in a direction of a line normal to the recording medium so as to be divided in the conveying direction.Type: GrantFiled: August 24, 2004Date of Patent: December 5, 2006Assignee: Fuji Xerox Co., Ltd.Inventors: Ryo Ando, Hiroaki Satoh, Satoru Nishikawa, Kozo Tagawa, Takeshi Kato, Tsutomu Udaka, Toshiyuki Kazama, Yoshiki Matsuzaki, Osamu Goto, Susumu Kibayashi, Yoshihiko Mitamura