Patents by Inventor Kazuhiko Yuki
Kazuhiko Yuki 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: 8199381Abstract: A pasting apparatus includes a pasting member operative to paste a non-transparent medium onto an image-formed surface of a transparent medium; and a conveying member that conveys the non-transparent medium to the pasting member by electrostatic adsorption.Type: GrantFiled: March 14, 2008Date of Patent: June 12, 2012Assignee: Ricoh Company, LimitedInventors: Kazuhisa Sudo, Mikio Ishibashi, Reki Nakamura, Megumi Ohtoshi, Yukiko Iwasaki, Kazuhiko Yuki, Nobuyuki Koinuma, Takashi Sakamaki, Ryuji Yoshida
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Patent number: 8180246Abstract: An image forming apparatus includes multiple image forming units disposed adjacent to and horizontally aligned with each other to form respective single non-black color images, a first transfer member to sequentially transfer and overlay the respective single non-black color images thereon for forming a composite color image, a black image forming unit disposed separately from the multiple image forming units including a black image carrier and a black image developing unit, a second transfer member to transfer the black image from the black image forming unit onto a recording medium, a first cleaning unit to clean the surface of the black image carrier, and a second cleaning unit to clean the surface of the second transfer member. The black toner removed from the surface of the black image carrier is collected to the black image developing unit.Type: GrantFiled: August 17, 2009Date of Patent: May 15, 2012Assignee: Ricoh Company, Ltd.Inventors: Shinichi Kawahara, Masumi Sato, Nobuyuki Koinuma, Kazuhisa Sudo, Tokuya Ojimi, Kazuhiko Yuki, Kohsuke Yamamoto, Takehide Mizutani, Masaki Sukesako, Ryuji Yoshida
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Patent number: 8010005Abstract: An image forming apparatus includes a transfer device, a voltage applicator, a current sensor, and a discharge detector. The transfer device transfers a toner image from one surface to another by developing an electrical field across a transfer gap when provided with a transfer bias. The voltage applicator applies a stepped test voltage to the transfer device. The current sensor senses a current flowing to the transfer device during application of the test voltage the discharge detector detects an electrical discharge occurring in the transfer gap based on a rate of increase of the sensed current.Type: GrantFiled: February 6, 2009Date of Patent: August 30, 2011Assignee: Ricoh Company LimitedInventors: Masaki Sukesako, Nobuyuki Koinuma, Kazuhisa Sudo, Kazuhiko Yuki, Hiroaki Takahashi, Takehide Mizutani, Ryuji Yoshida
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Patent number: 7997320Abstract: A sheet cutter cuts an adhesion sheet and includes a pair of blades including a first blade including a blade edge and a second blade opposing the first blade and including a blade edge. The pair of blades cuts a border of the adhesion sheet. The adhesion sheet is formed by adhering a first sheet, at least a part of which is transparent and bears a mirror image, to a non-transparent second sheet including an adhesive layer, to oppose the mirror image on the first sheet against the adhesive layer of the second sheet.Type: GrantFiled: June 11, 2008Date of Patent: August 16, 2011Assignee: Ricoh Company, Ltd.Inventors: Kohsuke Yamamoto, Kazuhisa Sudo, Reki Nakamura, Takehide Mizutani, Mikio Ishibashi, Yukiko Iwasaki, Nobuyuki Koinuma, Takashi Sakamaki, Kazuhiko Yuki, Ryuji Yoshida, Megumi Ohtoshi
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Patent number: 7909081Abstract: A sheet laminator includes a bonding unit and a restricting unit. The bonding unit bonds a first sheet to a second sheet that includes an adhesive layer. The restricting unit restricts movement of any one of the first sheet and the second sheet thereby preventing bonding between the first sheet and the second sheet before the first sheet and the second sheet reach the bonding unit.Type: GrantFiled: March 14, 2008Date of Patent: March 22, 2011Assignee: Ricoh Company, LimitedInventors: Kazuhisa Sudo, Mikio Ishibashi, Reki Nakamura, Megumi Ohtoshi, Yukiko Iwasaki, Kazuhiko Yuki, Nobuyuki Koinuma, Takashi Sakamaki, Ryuji Yoshida, Takehide Mizutani, Kohsuke Yamamoto
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Publication number: 20100040393Abstract: An image forming apparatus includes multiple image forming units disposed adjacent to and horizontally aligned with each other to form respective single non-black color images, a first transfer member to sequentially transfer and overlay the respective single non-black color images thereon for forming a composite color image, a black image forming unit disposed separately from the multiple image forming units including a black image carrier and a black image developing unit, a second transfer member to transfer the black image from the black image forming unit onto a recording medium, a first cleaning unit to clean the surface of the black image carrier, and a second cleaning unit to clean the surface of the second transfer member. The black toner removed from the surface of the black image carrier is collected to the black image developing unit.Type: ApplicationFiled: August 17, 2009Publication date: February 18, 2010Inventors: Shinichi Kawahara, Masumi Sato, Nobuyuki Koinuma, Kazuhisa Sudo, Tokuya Ojimi, Kazuhiko Yuki, Kohsuke Yamamoto, Takehide Mizutani, Masaki Sukesako, Ryuji Yoshida
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Publication number: 20090196638Abstract: An image forming apparatus includes a transfer device, a voltage applicator, a current sensor, and a discharge detector. The transfer device transfers a toner image from one surface to another by developing an electrical field across a transfer gap when provided with a transfer bias. The voltage applicator applies a stepped test voltage to the transfer device. The current sensor senses a current flowing to the transfer device during application of the test voltage the discharge detector detects an electrical discharge occurring in the transfer gap based on a rate of increase of the sensed current.Type: ApplicationFiled: February 6, 2009Publication date: August 6, 2009Inventors: Masaki SUKESAKO, Nobuyuki Koinuma, Kazuhisa Sudo, Kazuhiko Yuki, Hiroaki Takahashi, Takehide Mizutani, Ryuji Yoshida
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Publication number: 20090044915Abstract: A sheet bonding machine bonds together a first sheet and a second sheet including an adhesion layer formed on one side thereof, covered with a release paper, includes a transport unit to transport the first sheet unidirectionally, a feeder to feed the second sheet obliquely toward the first sheet, a separation unit, a reel, an adhesion point, and a tensioner. The release paper is removed from the second sheet by the separation unit located upstream from the contact portion, and reeled by the reel. The second sheet adheres to the first sheet via the adhesion layer 91b at the adhesion point located downstream from the separation unit. The tensioner is located upstream from the separation unit and keeps the second sheet taut.Type: ApplicationFiled: August 15, 2008Publication date: February 19, 2009Inventors: Takehide Mizutani, Kazuhisa Sudo, Mikio Ishibashi, Reki Nakamura, Megumi Arai, Yukiko Iwasaki, Kazuhiko Yuki, Nobuyuki Koinuma, Ryuji Yoshida, Kohsuke Yamamoto
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Publication number: 20090000445Abstract: A sheet cutter cuts an adhesion sheet and includes a pair of blades including a first blade including a blade edge and a second blade opposing the first blade and including a blade edge. The pair of blades cuts a border of the adhesion sheet. The adhesion sheet is formed by adhering a first sheet, at least a part of which is transparent and bears a mirror image, to a non-transparent second sheet including an adhesive layer, to oppose the mirror image on the first sheet against the adhesive layer of the second sheet.Type: ApplicationFiled: June 11, 2008Publication date: January 1, 2009Inventors: Kohsuke Yamamoto, Kazuhisa Sudo, Reki Nakamura, Takehide Mizutani, Mikio Ishibashi, Yukiko Iwasaki, Nobuyuki Koinuma, Takashi Sakamaki, Kazuhiko Yuki, Ryuji Yoshida, Megumi Ohtoshi
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Publication number: 20080225351Abstract: A pasting apparatus includes a pasting member operative to paste a non-transparent medium onto an image-formed surface of a transparent medium; and a conveying member that conveys the non-transparent medium to the pasting member by electrostatic adsorption.Type: ApplicationFiled: March 14, 2008Publication date: September 18, 2008Inventors: Kazuhisa Sudo, Mikio Ishibashi, Reki Nakamura, Megumi Ohtoshi, Yukiko Iwasaki, Kazuhiko Yuki, Nobuyuki Koinuma, Takashi Sakamaki, Ryuji Yoshida
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Publication number: 20080227019Abstract: A heating unit heats an image-printed medium including a transparent recording medium and a non-transparent recording medium with an image sandwiched between the transparent recording medium and the non-transparent recording medium.Type: ApplicationFiled: March 13, 2008Publication date: September 18, 2008Inventors: Yukiko Iwasaki, Reki Nakamura, Kazuhisa Sudo, Megumi Ohtoshi, Mikio Ishibashi, Nobuyuki Koinuma, Takashi Sakamaki, Kazuhiko Yuki, Ryuji Yoshida
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Publication number: 20080223515Abstract: A sheet laminator includes a bonding unit and a restricting unit. The bonding unit bonds a first sheet to a second sheet that includes an adhesive layer. The restricting unit restricts movement of any one of the first sheet and the second sheet thereby preventing bonding between the first sheet and the second sheet before the first sheet and the second sheet reach the bonding unit.Type: ApplicationFiled: March 14, 2008Publication date: September 18, 2008Inventors: Kazuhisa Sudo, Mikio Ishibashi, Reki Nakamura, Megumi Ohtoshi, Yukiko Iwasaki, Kazuhiko Yuki, Nobuyuki Koinuma, Takashi Sakamaki, Ryuji Yoshida, Takehide Mizutani, Kohsuke Yamamoto
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Publication number: 20080196832Abstract: A sheet adhering apparatus includes an adhering device to convey a first sheet at a first conveyance speed and a second sheet at a second conveyance speed different from the first conveyance speed. The adhering device causes the second sheet to obliquely contact and adhere to the first sheet at a given adhering angle.Type: ApplicationFiled: January 28, 2008Publication date: August 21, 2008Inventors: Reki Nakamura, Mikio Ishibashi, Kazuhisa Sudo, Nobuyuki Koinuma, Kazuhiko Yuki, Yukiko Iwasaki, Megumi Ohtoshi, Takashi Sakamaki, Ryuji Yoshida
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Publication number: 20080185091Abstract: A sheet bonding machine for bonding first sheet and a second sheet together includes a transport part, an angling member, and a pressure bond part. The transport part is configured to transport the first sheet and the second sheet and contact the first and the second sheet against each other at a predetermined angle. The angling member is configured to bend at least one of the first sheet and the second sheet. The pressure bond part is provided downstream of a contact position between the first sheet and the second sheet and configured to bond together with pressure the first sheet and the second sheet contacted against each other.Type: ApplicationFiled: February 4, 2008Publication date: August 7, 2008Inventors: Kazuhisa Sudo, Mikio Ishibashi, Reki Nakamura, Megumi Ohtoshi, Yukiko Iwasaki, Nobuyuki Koinuma, Takashi Sakamaki, Kazuhiko Yuki, Ryuji Yoshida
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Publication number: 20080019708Abstract: An image recording medium includes a first sheet and a second sheet. The first sheet further includes a transparent portion having a transparent adhesive layer on which a mirror image of an original image is formed. The second sheet is formed of non-transparent material having a color distinguishable from a color of the mirror image. The second sheet is overlaid on the transparent adhesive layer, having the mirror image formed thereon, of the first sheet.Type: ApplicationFiled: July 18, 2007Publication date: January 24, 2008Inventors: Takashi Sakamaki, Reki Nakamura, Mikio Ishibashi, Kazuhisa Sudo, Yukiko Iwasaki, Masafumi Yamada, Megumi Ohtoshi, Nobuyuki Koinuma, Kazuhiko Yuki
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Patent number: 5864733Abstract: An image forming apparatus including a photoconductive drum, a charger which charges the photoconductive drum, an exposing device which irradiates light to the charged photoconductive drum for forming an electrostatic latent image on the photoconductive drum, a developing device which has two component developer which includes magnetic toner and magnetic carriers and a transfer charger to transfer the developed image to a sheet of paper. The bias voltages of the charger, the developing device and the transfer charger are applied from a common high voltage power source. A developing starting voltage of the developing device is higher than a residual voltage of the photoconductive drum.Type: GrantFiled: October 25, 1996Date of Patent: January 26, 1999Assignee: Ricoh Company, Ltd.Inventors: Asami Mae, Manabu Mochizuki, Kentaro Matsumoto, Kenji Karashima, Kazuhiko Yuki, Chikara Imai, Hajime Oyama, Noriyuki Usui