Patents by Inventor Takuma Nakamura

Takuma Nakamura 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).

  • Publication number: 20110008081
    Abstract: A disclosed cleaning device for removing adhering matter from a surface of a member subject to cleaning includes a belt-shaped film member arranged in a stretched configuration capable of being wound or endlessly move in a direction opposite to a surface movement direction of the member subject to cleaning while being in contact with the surface of the member subject to cleaning, and a cleaning blade configured to abut on the surface of the member subject to cleaning via the belt-shaped film member at a position where the belt-shaped film member is brought into contact with the member subject to cleaning.
    Type: Application
    Filed: May 13, 2010
    Publication date: January 13, 2011
    Inventors: Yuichi AOYAMA, Yasuo Katano, Yukimichi Someya, Takuma Nakamura, Tetsurou Sasamoto, Shunichi Abe, Masafumi Yamada
  • Patent number: 7869754
    Abstract: A bubbly fluid producing method configured to produce a bubbly fluid containing a bubble with a desired bubble diameter, includes applying a shear to a bubbly fluid containing a bubble with a bubble diameter larger than a desired bubble diameter so as to produce a bubbly fluid containing a bubble with a desired bubble diameter. A bubbly fluid producing device configured to produce a bubbly fluid containing a bubble with a desired bubble diameter, includes a first member configured to apply a shear to a bubbly fluid containing a bubble with a bubble diameter larger than a desired bubble diameter so as to produce a bubbly fluid containing a bubble with a desired bubble diameter.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: January 11, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuo Katano, Tsuneo Kurotori, Tomoyasu Hirasawa, Takuma Nakamura, Yuko Arizumi
  • Patent number: 7813689
    Abstract: A disclosed fixing device fixes unfixed toner onto a recording sheet with the use of toner fixing liquid including a softening agent for softening toner. The fixing device includes a sprayer configured to spray the toner fixing liquid as liquid droplets and a liquid droplet charging unit configured to apply an electric charge to the sprayed liquid droplets. The sprayer sprays the liquid droplets onto the unfixed toner placed on the recording sheet. The liquid droplet charging unit applies, to the sprayed liquid droplets, an electric charge of an electric charge polarity that is the same as that of the unfixed toner.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: October 12, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Takuma Nakamura, Yasuo Katano, Tsuneo Kurotori, Tomoyasu Hirasawa, Takeshi Saitoh, Yuko Arizumi
  • Patent number: 7773932
    Abstract: A fixation device configured to fix on a medium a resin fine particle that contains a resin, by providing a fixation fluid on the resin fine particle on the medium which fixation fluid contains a softening agent that softens the resin fine particle by dissolving or swelling at least one portion of the resin, water and a foaming agent that comprises a salt of aliphatic acid, wherein the fixation device comprises a foam-like fixation fluid producing part configured to produce a foam-like fixation fluid, a layer thickness controlling part configured to control a layer thickness of the produced foam-like fixation fluid, and a provision part configured to provide the layer-thickness-controlled foam-like fixation fluid on the resin fine particle on the medium.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: August 10, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuo Katano, Tsuneo Kurotori, Tomoyasu Hirasawa, Takuma Nakamura
  • Publication number: 20100154117
    Abstract: A transfer assist apparatus includes: an arm portion that has a first joint and a second joint; a holder portion linked to the arm portion; a manipulation handle for manipulating the position and the posture of the holder potion; a first drive mechanism that drives the first joint; a second drive mechanism that drives the second joint; and a control portion that controls the first drive mechanism and the second drive mechanism so that the posture of the holder portion is maintained in a predetermined acceptable range, based on information that is input from the manipulation handle, and angle information regarding the first joint and the second joint.
    Type: Application
    Filed: December 18, 2009
    Publication date: June 24, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tadashi ODASHIMA, Takuma NAKAMURA
  • Patent number: 7713673
    Abstract: A fixing liquid is provided which fixes a toner comprising a resin on a recording medium, in which a fluid particle comprising a component which dissolves or swells at least a portion of the resin comprised in the toner is dispersed in a dispersive medium, as a micro-emulsion.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: May 11, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuo Katano, Tsuneo Kurotori, Tomoyasu Hirasawa, Hiromichi Komai, Takuma Nakamura
  • Patent number: 7689145
    Abstract: A replacement unit having a toner bottle and a fixing liquid bottle integrated with each other is attached to a printer main body (image forming apparatus main body). Toner particles accommodated in the toner bottle are allowed to be supplied to a development device of the image forming apparatus main body. A sheet member (sealing unit) of a liquid supplying port of the fixing liquid bottle is broken by an insertion pin provided in the printer main body in synchronization with the attachment of the replacement unit to the printer main body. A toner fixing liquid including a softening agent for softening the toner particles and a solvent for dissolving or dispersing the softening agent is supplied from the fixing liquid bottle to a fixing liquid storage of a fixing device of the printer main body.
    Type: Grant
    Filed: June 4, 2008
    Date of Patent: March 30, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Takuma Nakamura, Takeshi Saitoh, Yuko Arizumi
  • Patent number: 7655374
    Abstract: A fixing liquid configured to fix a toner containing a resin on a recording medium is disclosed, wherein a particle containing a component capable of dissolving or swelling at least one portion of the resin contained in the toner is dispersed in a nonaqueous dispersing medium. A toner fixing method of fixing a toner containing a resin on a recording medium is disclosed, wherein the fixing liquid as described above is used. A toner fixing apparatus configured to fix a toner containing a resin on a recording medium is disclosed, wherein the toner fixing method as described above is used.
    Type: Grant
    Filed: May 17, 2006
    Date of Patent: February 2, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuo Katano, Tsuneo Kurotori, Hiromichi Komai, Takuma Nakamura, Tomoyasu Hirasawa
  • Publication number: 20090324309
    Abstract: A fixing apparatus to fix unfixed toner carried on a surface of a recording medium by attaching a fixing solution capable of softening toner onto the unfixed toner is provided. The fixing apparatus includes a sprayer to spray the fixing solution; a fixing solution charging part to charge the fixing solution; a first electrode to rotate and provided on a same side of the recording medium as the surface carrying the unfixed toner; a second electrode provided on an opposite side of the recording medium to the surface carrying the unfixed toner; and a voltage applying part to generate an electric field between the first electrode and the second electrode so that the fixing solution sprayed by the sprayer and charged by the fixing solution charging part moves toward the second electrode.
    Type: Application
    Filed: April 29, 2009
    Publication date: December 31, 2009
    Inventors: TAKUMA NAKAMURA, TAKESHI SAITOH, YUKO ARIZUMI
  • Publication number: 20090067868
    Abstract: A temperature control unit that maintains a temperature of a fixing liquid includes a container, some or all of which is formed of a heat conservation member, configured to store the fixing liquid that dissolves or causes a toner to swell, a heater provided to an image forming apparatus for heating the container through the heat conservation member, a temperature sensor for detecting a temperature of the fixing liquid in the container, a controller for controlling an amount of heat that is transferred from the heater to the heat conservation member of the container based on a detection result provided by the temperature sensor, and a fixing liquid applicator for supplying the fixing liquid in the container to a toner on a recording medium so as to fix the toner onto the recording medium. The image forming apparatus includes the temperature control unit.
    Type: Application
    Filed: September 9, 2008
    Publication date: March 12, 2009
    Inventors: Yuko Arizumi, Takeshi Saitoh, Takuma Nakamura
  • Publication number: 20090022527
    Abstract: A replacement unit having a toner bottle and a fixing liquid bottle integrated with each other is attached to a printer main body (image forming apparatus main body). Toner particles accommodated in the toner bottle are allowed to be supplied to a development device of the image forming apparatus main body. A sheet member (sealing unit) of a liquid supplying port of the fixing liquid bottle is broken by an insertion pin provided in the printer main body in synchronization with the attachment of the replacement unit to the printer main body. A toner fixing liquid including a softening agent for softening the toner particles and a solvent for dissolving or dispersing the softening agent is supplied from the fixing liquid bottle to a fixing liquid storage of a fixing device of the printer main body.
    Type: Application
    Filed: June 4, 2008
    Publication date: January 22, 2009
    Inventors: Takuma NAKAMURA, Takeshi SAITOH, Yuko ARIZUMI
  • Publication number: 20090003903
    Abstract: A fixing device, and an image forming method and an image forming apparatus using the fixing device. The fixing device includes an application unit to apply a foam-like fixing agent including a softener to particulates including a resin on a medium, the softener softening the particulates by at least partially dissolving or swelling the resin and a thickness control unit to control a layer thickness of the foam-like fixing agent such that an application time during which the foam-like fixing agent is applied to the particulates is not shorter than a penetration time required for the foam-like fixing agent to penetrate through a layer of the particulates to the medium.
    Type: Application
    Filed: June 27, 2008
    Publication date: January 1, 2009
    Inventors: Yasuo KATANO, Tsuneo KUROTORI, Tomoyasu HIRASAWA, Tomoaki SUGAWARA, Takuma NAKAMURA, Yuko ARIZUMI
  • Publication number: 20080292373
    Abstract: A fixing device and an image forming apparatus including the fixing device. The fixing device includes a fixing member having a dielectric body to fix a toner image onto a recording medium by heating and melting the toner image onto the recording medium, a dielectric heating portion to heat the fixing member by dielectric heating, and a pressure member to press against the fixing member to form a nip portion therebetween to nip the recording medium as the recording medium is conveyed therebetween.
    Type: Application
    Filed: May 19, 2008
    Publication date: November 27, 2008
    Inventors: Takuma NAKAMURA, Yukimichi Someya, Misaki Shimizu
  • Publication number: 20080213002
    Abstract: A bubbly fluid producing method configured to produce a bubbly fluid containing a bubble with a desired bubble diameter is disclosed, which comprises a step of applying a shear to a bubbly fluid containing a bubble with a bubble diameter larger than a desired bubble diameter so as to produce a bubbly fluid containing a bubble with a desired bubble diameter. A bubbly fluid producing device configured to produce a bubbly fluid containing a bubble with a desired bubble diameter is disclosed, which comprises a first member configured to apply a shear to a bubbly fluid containing a bubble with a bubble diameter larger than a desired bubble diameter so as to produce a bubbly fluid containing a bubble with a desired bubble diameter.
    Type: Application
    Filed: February 7, 2008
    Publication date: September 4, 2008
    Inventors: Yasuo Katano, Tsuneo Kurotori, Tomoyasu Hirasawa, Takuma Nakamura, Yuko Arizumi
  • Publication number: 20080069612
    Abstract: A disclosed fixing device fixes unfixed toner onto a recording sheet with the use of toner fixing liquid including a softening agent for softening toner. The fixing device includes a sprayer configured to spray the toner fixing liquid as liquid droplets and an electrode configured to apply an electric charge to the sprayed liquid droplets. The sprayer sprays the liquid droplets onto the unfixed toner placed on the recording sheet. The electrode applies, to the sprayed liquid droplets, an electric charge of an electric charge polarity opposite to that of the unfixed toner.
    Type: Application
    Filed: September 7, 2007
    Publication date: March 20, 2008
    Inventors: Takuma Nakamura, Yasuo Katano, Tsuneo Kurotori, Tomoyasu Hirasawa, Takeshi Saitoh, Yuko Arizumi
  • Publication number: 20080063446
    Abstract: A fixation device configured to fix on a medium a resin fine particle that contains a resin, by providing a fixation fluid on the resin fine particle on the medium which fixation fluid contains a softening agent that softens the resin fine particle by dissolving or swelling at least one portion of the resin, water and a foaming agent that comprises a salt of aliphatic acid, wherein the fixation device comprises a foam-like fixation fluid producing part configured to produce a foam-like fixation fluid, a layer thickness controlling part configured to control a layer thickness of the produced foam-like fixation fluid, and a provision part configured to provide the layer-thickness-controlled foam-like fixation fluid on the resin fine particle on the medium.
    Type: Application
    Filed: August 31, 2007
    Publication date: March 13, 2008
    Inventors: Yasuo Katano, Tsuneo Kurotori, Tomoyasu Hirasawa, Takuma Nakamura
  • Publication number: 20070243483
    Abstract: The present invention provides a fixing liquid for fixing microparticles containing a resin to a medium, a fixing device using this fixing liquid, and an image forming apparatus comprising this fixing device. The fixing liquid of the present invention is a fixing liquid for fixing resin microparticles to a medium, and is a water-in-oil type fixing liquid comprising a continuous oil phase at least one portion of which comprises a softener for softening the resin microparticles by dissolving or swelling at least one portion of the resin microparticles, and an aqueous phase, as a separate phase, dispersed in the oil phase. As a result, the fixing liquid combines preservability during storage and drying property on a medium after application of the fixing liquid, is free of residual oily feel during application, and affords better fixing responsiveness than conventional fixing liquids.
    Type: Application
    Filed: April 12, 2007
    Publication date: October 18, 2007
    Inventors: Yasuo Katano, Tsuneo Kurotori, Tomoyasu Hirasawa, Hiromichi Komai, Takuma Nakamura
  • Publication number: 20070147913
    Abstract: A fixing liquid is provided which fixes a toner comprising a resin on a recording medium, in which a fluid particle comprising a component which dissolves or swells at least a portion of the resin comprised in the toner is dispersed in a dispersive medium, as a micro-emulsion.
    Type: Application
    Filed: December 20, 2006
    Publication date: June 28, 2007
    Inventors: Yasuo Katano, Tsuneo Kurotori, Tomoyasu Hirasawa, Hiromichi Komai, Takuma Nakamura
  • Publication number: 20060263712
    Abstract: A fixing liquid configured to fix a toner containing a resin on a recording medium is disclosed, wherein a particle containing a component capable of dissolving or swelling at least one portion of the resin contained in the toner is dispersed in a nonaqueous dispersing medium. A toner fixing method of fixing a toner containing a resin on a recording medium is disclosed, wherein the fixing liquid as described above is used. A toner fixing apparatus configured to fix a toner containing a resin on a recording medium is disclosed, wherein the toner fixing method as described above is used.
    Type: Application
    Filed: May 17, 2006
    Publication date: November 23, 2006
    Inventors: Yasuo Katano, Tsuneo Kurotori, Hiromichi Komai, Takuma Nakamura, Tomoyasu Hirasawa
  • Patent number: 4851924
    Abstract: An overhead projector having scanning device for scanning an original image thereby generating electric signals corresponding to the original image, selecting device for selecting one of a thermochromic film and a thermographic paper, a first heating device for heating the film thereby erasing an image formed formerly in the film, a second heating device for heating the film in accordance with the electric signals transmitted from the scanning device to form an image corresponding to the original image in the film when the film is selected by the selecting device and for jheating the thermographic paper in accordance with the electric signals transmitted from the scanning device to print an image corresponding to the original image in the thermographic paper when the thermographic paper is selected by the selecting device, andprojecting device for projecting the image formed in the film on a given screen.
    Type: Grant
    Filed: July 18, 1988
    Date of Patent: July 25, 1989
    Assignee: Ricoh Company, Ltd.
    Inventors: Takuma Nakamura, Yasuhiko Saka