Patents by Inventor Takashi Yamanaka

Takashi Yamanaka 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).

  • Fixing device, image forming device, and manufacturing method of fixing device
    Patent number: 7171148
    Abstract: A fixing device comprising a fix member for touching an unfixed image on a recording medium, and a press member for being pressed against the fixing member, so as to fix the unfixed image on the recording medium by transporting the recording medium through a nip between the fix member and the press member, wherein (100·K1)?(K2)?(320·K1) where K1 is a heat transmission coefficient of the press member and K2 is a heat transmission coefficient of the fix member. With this arrangement, it is possible to transmit heat to toner and the recording medium in a short time. Thus, it is possible to attain high-speed printing.
    Type: Grant
    Filed: November 23, 2004
    Date of Patent: January 30, 2007
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tetsunori Mitsuoka, Hiroshi Kida, Toshiaki Kagawa, Takashi Yamanaka
  • Image forming apparatus
    Patent number: 7164878
    Abstract: A fixing device for fixing an image formed on a sheet member is disposed on a transportation path for transporting the sheet member thereon. The fixing device can be attached to or detached from the main body of an image forming apparatus, and a guide member is provided in the image forming apparatus for guiding the fixing device when it is attached to or detached from the main body of the image forming apparatus. The guide member includes an inclined surface on which the fixing device is placed to be guided upward for attachment. If the fixing device is unlocked from the main body of the image forming apparatus at the time of maintenance or the like, the fixing device is moved outwardly along the inclined surface due to its own weight.
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: January 16, 2007
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Takashi Yamanaka
  • Power switching system for acoustic apparatus
    Patent number: 7159483
    Abstract: It is sought to simplify the arrangement of the drive power switching system for an acoustic apparatus, thus permitting immediate switching of the drive power. A drive power switching system comprises driven gears always in mesh with a main drive gear located between a first and a second gear and a rocking member rotatably supporting the driven gears. The inter-axis distance between the axes of rotation of the first and second gears, is set to a length, in which the driven gears can be meshed with both the first and second gears as they are revolved together with the revolution of the rocking member.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: January 9, 2007
    Assignee: Tanashin Denki Co., Ltd.
    Inventor: Takashi Yamanaka
  • Heating device
    Publication number: 20060289417
    Abstract: A fusing device (23) has heat reflectors (238) and (239) positioned in consideration of the fact that convective heat loss from respective outer surfaces of the heat reflectors (238) and (239) depends on orientation of the outer surfaces. More specifically, each of the heat reflectors (238) and (239) are positioned so as to have a convective heat transfer coefficient ? of up to 0.9. The convective heat transfer coefficient ? is given by the following expression: ?=(Su+0.77Sh+0.54Sd)/(Su+Sh+Sd), were Su is a projected area of an outer surface of each of the heat reflectors on an upper horizontal plane, Sh is a projected area of the same on a vertical plane, and Sd is a projected area of the same on a lower horizontal plane.
    Type: Application
    Filed: May 11, 2004
    Publication date: December 28, 2006
    Inventors: Toshiaki Kagawa, Hiroshi Kida, Takashi Yamanaka, Tetsunori Mitsuoka
  • FIXING DEVICE AND IMAGE FORMING APPARATUS HAVING THE SAME
    Publication number: 20060269332
    Abstract: A fixing device mounted in an electrophotographic image forming apparatus, for fixing a toner image formed on recording paper includes: a plurality of peeling claws provided for peeling off the recording paper from a fixing roller; a number-of-processed-sheet detecting portion for detecting a number of processed sheets of recording paper which is treated with a fixing process upon passing through the fixing roller; a peeling claw driving section for moving a plurality of the peeling claws in parallel with an axial direction of the fixing roller; and a control unit for controlling the peeling claw driving section to operate so that a relative position between the peeling claw and the fixing roller changes according to a detected output of the number-of-processed-sheet detecting portion.
    Type: Application
    Filed: May 25, 2006
    Publication date: November 30, 2006
    Inventors: Takashi YAMANAKA, Kimihide TSUKAMOTO, Tatsuya SHINKAWA, Kan MUKAI
  • Fluid machine
    Publication number: 20060254309
    Abstract: A fluid machine has a scroll type expansion device which is operated by a high temperature high pressure refrigerant. The refrigerant is heated by use of waste heat from an engine for a vehicle. The fluid machine further has a motor generator for generating electric power when it is driven by a rotational force produced at the expansion device, wherein a rotating shaft of the motor generator is coupled to a movable scroll of the expansion device via a crank mechanism. A biasing member is provided for biasing the crank mechanism in a direction that the movable scroll wrap is separated from a contact in a circumferential direction with a fixed scroll wrap. Pressure of the refrigerant in a working chamber in the center portion is thereby equalized to the pressure in the outer peripheral portion, at a startup period of the expansion mode.
    Type: Application
    Filed: May 11, 2006
    Publication date: November 16, 2006
    Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.
    Inventors: Yasuhiro Takeuchi, Keiichi Uno, Shigeru Hisanaga, Hironori Asa, Takashi Yamanaka, Atsushi Inaba, Kazuhide Uchida, Hiroshi Ogawa, Yoichiro Kawamoto, Hiroshi Kishita
  • Heating device and image forming device
    Publication number: 20060237417
    Abstract: Within a fixing roller (231) are disposed a main heater lamp (234a) for heating a central portion of the fixing roller and a sub-heater lamp (235a) for heating opposite end portions of the fixing roller. MRnh, SRnh and ?Rnh satisfy the formula (1) or (2): ?Rnh?30.5·Ln(Ht)+382??formula (1) MRnh??21.9·Ln(Ht)?198??formula (2), where MRnh is a mean value of heat distribution in a no-heat generating section of the main heater lamp; SRnh is a mean value of heat distribution in the a no-heat generating section of the sub-heater lamp; ?Rnh is the sum total of these mean values; and Ht=vp/(Mh·?) where vp is a fixing speed (m/s), Mh a heat capacity per unit length of the heating member (J/(° C.·m)) and ? a heat conductivity of a material forming the heating member (W/(m·° C.)).
    Type: Application
    Filed: August 10, 2004
    Publication date: October 26, 2006
    Inventors: Toshiaki Kagawa, Hiroshi Kida, Takashi Yamanaka, Tetsunori Mitsuoka
  • Device for utilizing waste heat from heat engine
    Publication number: 20060225421
    Abstract: A device for utilizing waste heat from a heat engine comprises a Rankine cycle including a pump, a heating device, an expansion device, and a condenser device, and a controller for controlling an operation of the Rankine cycle. The controller calculates an optimum heat collection amount (Qho) as a heat value to be collected from waste heat of the engine, wherein the heat collection amount (Qho) is calculated as an optimum amount in relation to a potential maximum heat radiation amount (Qco) to be radiated at the condenser device. The controller calculates an optimum flow amount (G) of refrigerant corresponding to the optimum heat collection amount (Qho), so that a maximum driving power (L) is generated at the expansion device.
    Type: Application
    Filed: December 22, 2005
    Publication date: October 12, 2006
    Applicant: DENSO Corporation
    Inventors: Takashi Yamanaka, Atsushi Inaba, Shinichi Hamada
  • Cleaning device for a fixing unit
    Publication number: 20060216076
    Abstract: A fixing unit includes a heat roller and a pressing roller that comes in pressure contact with the heat roller, and passes the recording paper with an unfixed toner image formed thereon through the nip between the heat roller and pressing roller to thereby fix the toner image to the recording paper by applying heat and pressure thereto. A cleaning device for removing the toner remaining on the heat roller or pressing roller in the fixing unit includes cleaning rollers made of metal arranged in press-contact with the heat roller and pressing roller, the peripheral surface of the cleaning rollers being formed with projected and indented shapes to thereby remove the leftover toner appropriately.
    Type: Application
    Filed: March 7, 2006
    Publication date: September 28, 2006
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Tatsuya Shinkawa, Takashi Yamanaka, Kan Mukai, Kouji Wakamoto
  • Pick-up drive apparatus for disc player
    Publication number: 20060200838
    Abstract: The invention is a proposal of a pick-up drive apparatus for a disc player, which permits reducing the rotation resistance offered by a feed screw for driving a pick-up. A guide shaft and a feed screw are disposed side by side. an engagement part of a coupling member is held in radial and elastically forced contact with the feed screw. With rotation of the feed screw, the coupling member is thus advanced and retreated in the axial directions of the feed screw. A pick-up seat carrying a pick-up is caused to follow the coupling member for advancement and retreat along the guide shaft. The coupling member is mounted on the guide shaft for rocking movement and axial advancement and retreat. The coupling member has a pair of clamping pieces clamping the feed screw from the opposite sides in the direction of rocking movement. The engagement part is formed on one of the clamping members.
    Type: Application
    Filed: March 7, 2006
    Publication date: September 7, 2006
    Applicant: Tanshin Denki Co., Ltd.
    Inventors: Takashi Yamanaka, Toshio Yoshimura, Akeshi Shitamichi
  • Cooling structure of heat generating member
    Publication number: 20060169507
    Abstract: A cooling structure includes a plurality of plate-shaped heat generating members such as battery parts, DC voltage converters and electrical member (e.g., relay). In the cooling structure, the heat generating members are arranged in a plate-thickness direction to have predetermined spaces for forming fluid passages each of which is provided between adjacent heat generating members, and the fluid passages are provided to pass a fluid for cooling the heat generating members. Accordingly, all the heat generating members can be effectively cooled while the cooling structure can be made compact.
    Type: Application
    Filed: February 1, 2006
    Publication date: August 3, 2006
    Applicant: DENSO Corporation
    Inventors: Yoshimitsu Inoue, Masamichi Makihara, Takashi Yamanaka
  • Fixing device
    Publication number: 20060159479
    Abstract: The present invention provides a fixing device for fixing a toner image formed on paper by sandwiching the paper in a nip region between a heating roller and a pressing roller and pressing the paper while heating the paper to a fixing temperature. This fixing device includes a cleaning roller that is in contact with the pressing roller, and temperature control means that sets a temperature of the heating roller to a cleaning temperature that is higher than the fixing temperature.
    Type: Application
    Filed: January 5, 2006
    Publication date: July 20, 2006
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Shinji Sugita, Tatsuya Shinkawa, Takashi Yamanaka, Kan Mukai, Kouji Wakamoto
  • Disc transfer apparatus
    Publication number: 20060143630
    Abstract: The present invention seeks to provide a disc transfer apparatus, which permits increasing the disc kick-off extent while holding a constant distance between a transfer roller and a turntable. A disc transfer apparatus is disclosed, which can choose either one of a play-back base fixing mode, in which a transfer roller is held at a disc transfer position while restricting motion of the play-back base relative to a housing, thereby permitting loading/unloading of disc, and a play-back base release mode, in which the transfer roller is held at a non-disc transfer position while holding the play-back base in a floating state relative to the housing.
    Type: Application
    Filed: December 28, 2005
    Publication date: June 29, 2006
    Applicant: Tanashin Denki Co., Ltd.
    Inventors: Takashi Yamanaka, Toshio Yoshimura, Akeshi Shitamichi, Eiji Shinohara
  • Clip for sash molding of vehicle door
    Patent number: 7055291
    Abstract: A clip for a sash molding comprises an elongated end cap adapted to be inserted into an end portion of the sash molding, a fastener adapted to be fixed to a door pillar, and a lip for filling a gap between the sash molding and the door pillar. The fastener and the end cap are made of hard plastic material, and are integrally molded to one another. The lip is made of soft plastic material, and is integrally connected to the end cap in a predetermined configuration, by pouring the soft plastic material in its molten state onto a predetermined region of the end cap and solidifying the soft plastic material thereon. The clip may also include a cover portion, made of a soft plastic material, that continuously extends from the lip and is integrally connected to an end of the end cap.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: June 6, 2006
    Assignees: Newfrey LLC, Sankei Giken Kogyo Co., Ltd.
    Inventors: Hideaki Nakanishi, Takashi Yamanaka, Hideaki Sugimoto
  • Refrigerating apparatus and fluid machine therefor
    Publication number: 20060107681
    Abstract: A complex fluid machine has an expansion-compressor device, a pump, and a motor generator, wherein the expansion-compressor device, the pump, and the motor generator are operatively connected and arranged in series, and a power transmitting device for disconnecting the pump from the motor generator, when the expansion-compressor device is driven by the motor generator so as to be operated as a compressor device.
    Type: Application
    Filed: October 28, 2005
    Publication date: May 25, 2006
    Applicants: DENSO CORPORATION, NIPPON SOKEN, INC.
    Inventors: Keiichi Uno, Hironori Asa, Yasuhiro Takeuchi, Hideji Yoshida, Akihiro Imura, Atsushi Inaba, Koichi Ban, Takashi Yamanaka, Shigeki Iwanami, Hiroshi Kishita, Hiroshi Ogawa
  • Vapor compression refrigerating apparatus
    Publication number: 20060080985
    Abstract: A vapor compression refrigerating apparatus comprises a refrigerating cycle for performing a cooling operation of an automotive air conditioning system, a Rankine cycle for collecting waste heat from an engine of a vehicle to generate an electric power by an electric rotating device driven by an expansion device of the Rankine cycle, and a heat pump cycle for generating heat to supply the generated heat to the engine so that a warming up operation of the engine can be facilitated.
    Type: Application
    Filed: October 17, 2005
    Publication date: April 20, 2006
    Applicant: DENSO Corporation
    Inventors: Atsushi Inaba, Yasushi Yamanaka, Koichi Ban, Takashi Yamanaka
  • Refrigerating device comprising waste heat utilization equipment
    Publication number: 20060026981
    Abstract: In a refrigerating device comprising waste heat utilization equipment having: a refrigerating cycle 200 formed by sequentially connecting a compressor 210, a condenser 210, an expansion valve 240, and an evaporator 250; and a Rankine cycle 300 formed by sequentially connecting a heater 310 using the waste heat of a heat generating device (for example, an internal combustion engine) 10 as a heating source, an expansion device 320, the above-mentioned condenser 220, and a pump 330, in which the drive shafts of the compressor 210 and the expansion device 320 are separated from each other. Then, the output of the expansion device 320 is used mainly for generating electricity.
    Type: Application
    Filed: August 1, 2005
    Publication date: February 9, 2006
    Applicants: DENSO Corporation, Nippon Soken, Inc.
    Inventors: Atsushi Inaba, Yasushi Yamanaka, Shigeru Hisanaga, Takashi Yamanaka, Hironori Asa, Hiroshi Kisita
  • Disc centering device
    Patent number: 6993776
    Abstract: It is sought to simplify a disc centering device. Stopper portions for centering a small-size disc are provided on disc sensors, and guide portions are provided, which, when the disc sensors are moved with insertion of a large-size disc, engage with the disc sensors to move the stopper portions to the outside of a disc transport path.
    Type: Grant
    Filed: February 13, 2003
    Date of Patent: January 31, 2006
    Assignee: Tanashin Denki Co., Ltd.
    Inventors: Takashi Yamanaka, Toshio Yoshimura
  • Heater, and image forming apparatus, heating method incorporating same
    Publication number: 20060013623
    Abstract: A fixer (heater) includes a heat roller and a pressure roller pressing each other. The fixer heats a heated material by passing the heated material through a press region where the heat roller and the pressure roller meet. The fixer further includes an external heat roller heating the pressure roller from outside the pressure roller. A transit time taken for any given point on the heated material to pass through the press region is less than or equal to 2.3×10?2 sec. The surface temperature, T1 (° C.), of the heat roller and the surface temperature, T2 (° C.), of the pressure roller satisfy T1-T2?100 (° C.), and preferably satisfy T1-T2?70 (° C.). The load on the heat roller is reduced, and so is the power consumption.
    Type: Application
    Filed: September 16, 2005
    Publication date: January 19, 2006
    Inventors: Toshiaki Kagawa, Hiroshi Kida, Takashi Yamanaka
  • System utilizing waste heat of internal combustion engine
    Publication number: 20050217288
    Abstract: A waste heat energy recovery system has a refrigerant cycle and a Rankine cycle. When the cycle operation is changed from the refrigerant cycle to the Rankine cycle, an expansion device is started after the pump is started. When the cycle operation is changed from the Rankine cycle to the refrigerant cycle, the expansion device is stopped after the pump is stopped.
    Type: Application
    Filed: March 22, 2005
    Publication date: October 6, 2005
    Inventors: Keiichi Uno, Hironori Asa, Atsushi Inaba, Takashi Yamanaka, Hideji Yoshida, Hiroshi Ogawa