Patents by Inventor Yasuhiro Takai

Yasuhiro Takai 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: 20080013127
    Abstract: In one embodiment, a discharge distribution setting portion sets which of a first discharge tray and a second discharge tray that recording paper will be discharged to, and how many sheets of recording paper to distribute, based on an input (instruction) to an operating display portion. More specifically, the discharge distribution setting portion has a function to, by setting a distribution division for a number of sheets of recording paper discharged in response to a print request (number of discharged sheets), distribute recording paper to the discharge trays (the first discharge tray and the second discharge tray) based on a number of sheets to distribute that has been assigned in advance to a discharge distribution destination.
    Type: Application
    Filed: July 9, 2007
    Publication date: January 17, 2008
    Inventors: Yasunobu OHKAWA, Jinichi Nagata, Yasuhiro Takai
  • Publication number: 20080012209
    Abstract: A movable sheet stacking device including: a sheet receiving section which is provided with respect to a sheet exit section of an image forming apparatus and is for receiving ejected sheets being ejected from the sheet exit seciton in an ejecting direction and moving the sheets in a direction opposite to the ejecting direction; an end-portion restriction plate which comes into contact with a front end of the sheets moving in the opposite direction to stop the movement of the sheets; and a restriction-plate driving section which sets a position of the end-portion restriction plate according to a sheet type.
    Type: Application
    Filed: January 26, 2007
    Publication date: January 17, 2008
    Inventors: Junya Masuda, Yoshinori Shiraishi, Yasuhiro Takai, Toyokazu Mori, Kohichi Matsumoto
  • Publication number: 20080008507
    Abstract: An image forming apparatus comprising: a main body having an image forming section; a sheet feed section having a sheet cassette that accommodates a recording sheet and can be drawn out and loaded to the main body; and a sheet misalignment preventing mechanism that intermittently comes into contact with an uppermost recording sheet in the sheet cassette so as to prevent misalignment of the recording sheet in a loading direction when the sheet cassette drawn out of the main body is reloaded.
    Type: Application
    Filed: July 9, 2007
    Publication date: January 10, 2008
    Inventors: Norichika Katsura, Tadasu Taniguchi, Masaharu Kimura, Masahiko Fujita, Yasuhiro Takai
  • Publication number: 20080006991
    Abstract: An ejection sheet stacker includes a sheet ejection tray on which ejected sheets are stacked, and an indicator which indicates the amount of sheets stacked on the sheet ejection tray. With this arrangement, a user can easily check the amount of sheets stacked on the sheet ejection tray.
    Type: Application
    Filed: July 9, 2007
    Publication date: January 10, 2008
    Inventors: Masaharu Kimura, Tadasu Taniguchi, Masahiko Fujita, Yasuhiro Takai
  • Publication number: 20070230974
    Abstract: A toner supply device which includes: a multiple number of toner bottles; and a toner supply assembly mounting mechanism having the toner bottles mounted thereon and feeding toner discharged from the toner bottles to a developing unit and is controlled so as to supply toner to the developing unit in accordance with the amount of toner consumed in the process of printing of the developing unit, further includes: micro switches which each detect the amount of toner left in the toner storing portion with toner filled therein; and a controller for controlling the operation of the toner supply device, which selects one of the toner bottles to be used for supply of toner to a toner feed device, based on the amounts of toner in the multiple toner bottles, which are detected by the micro switches.
    Type: Application
    Filed: March 2, 2007
    Publication date: October 4, 2007
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yasunobu Ohkawa, Yasuhiro Takai
  • Publication number: 20070223947
    Abstract: A toner supply device including: a toner bottle filled with toner; and a toner supply assembly mounting mechanism having the toner bottle mounted thereon and feeding toner discharged from the toner bottle to a developing unit and supplying toner to the developing unit in accordance with the amount of toner consumed in the developing unit for the process of printing, further comprises: a toner bottle releasing mechanism which, when the amount of toner left in the toner bottle has been reduced to a predetermined level or lower, causes the toner bottle to move in the direction opposite to the direction in which the toner bottle is set into the toner supply assembly mounting mechanism and separate from the toner feed device.
    Type: Application
    Filed: February 15, 2007
    Publication date: September 27, 2007
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Yasunobu Ohkawa, Jinichi Nagata, Kiwamu Morita, Yasuhiro Takai
  • Publication number: 20070217805
    Abstract: A fixing control section of a fixing apparatus according to the present invention includes an end section priority temperature control mode. In the end section priority temperature control mode, the fixing control section temporarily turns off a main heater heating a center section of a fixing roller among a plurarity of heaters disposed inside the fixing roller in a case where a surface temperature of the end section of the fixing roller has reached a preset upper-limit fixing temperature, even if the surface temperature of the center section of the fixing roller is lower than a preset fixing temperature. As a result, destruction of the fixing roller can be prevented by a simple arrangement in the fixing apparatus which includes a plurarity of the heaters disposed inside the fixing roller.
    Type: Application
    Filed: February 27, 2007
    Publication date: September 20, 2007
    Inventors: Noriko INOUE, Atsushi Ide, Kohji Aoki, Yasuhiro Takai
  • Publication number: 20070217804
    Abstract: In a fixing apparatus of the present invention, an end section fixing control temperature changing section selects an end section fixing control temperature in accordance with the number of paper sheets that have been processed in one continuous printing process. A sub-heater on/off determining section turns on or off a sub-heater in accordance with a temperature detected by an end section temperature sensor and the end section fixing control temperature selected by the end section fixing control temperature changing section. This prevents the occurrence of fixing failure even in continuous printing with respect to large-size paper sheets in an arrangement in which a temperature sensor is disposed outside a maximum-size sheet passing region at an end section of a fixing roller and controls energization of a heater which is disposed corresponding to the end section of the fixing roller in accordance with a temperature detected by the temperature sensor.
    Type: Application
    Filed: February 23, 2007
    Publication date: September 20, 2007
    Inventors: Toshiya MIKITA, Atsushi Ide, Kohji Aoki, Yasuhiro Takai
  • Patent number: 7271638
    Abstract: A delay circuit includes a first delay line circuit having a plurality of stages of delay units, a second delay line circuit having a plurality of stages of delay units, a plurality of transfer circuits provided in association with respective stages of the delay units of the first delay line circuit, the transfer circuits controlling the transfer of the outputs of the delay units of the first delay line circuit to associated stages of the delay units of the second delay line circuit. The delay units of respective stages of the first delay line circuit inverting input signals. Each stage delay unit of the second delay line circuit includes a logic circuit receiving an output signal of the transfer circuit associated with the delay unit in question and an output signal of a preceding stage to send an output signal to a following stage. The duty ratio is rendered variable by independently selecting the rising edge of the input signal and a propagation path of the falling edge.
    Type: Grant
    Filed: October 10, 2006
    Date of Patent: September 18, 2007
    Assignee: Elpida Memory, Inc.
    Inventors: Yasuhiro Takai, Shotaro Kobayashi
  • Publication number: 20070210843
    Abstract: A DLL circuit comprising: delay circuits which output first and second delayed clock signals obtained by delaying the reference clock signal by a delay times selected according to control signals; an interpolation circuit which interpolates a phase difference between the delayed clock signals to output an internal clock signal; an output circuit which generates a predetermined signal; a dummy output circuit which has the same transmission characteristics as the output circuit and outputs a feedback clock signal having the same phase as the predetermined signal; a phase comparison circuit which compares phases of the reference clock signal and the feedback clock signal; delay control circuits which controls the control signals in a direction where both phases are equal; wherein the delay time of the second delayed clock signal is larger than the first delayed clock signal by an amount equivalent to one cycle of the reference clock signal.
    Type: Application
    Filed: March 6, 2007
    Publication date: September 13, 2007
    Inventor: Yasuhiro TAKAI
  • Publication number: 20070206430
    Abstract: Disclosed is a semiconductor memory device, in which the refresh period of a fail cell or cells is set so as to be shorter than that of the normal cells, comprises a control circuit for exercising control in such a manner that, if, when refreshing the cell of a first address, generated responsive to a refresh command, with an input control signal being of a first value, a second address, differing as to the value of a predetermined bit from the first address, is determined to correspond to a fail cell, based on the information ore-programmed in a refresh redundant ROM, the cell of the second address is refreshed, and also in such a manner that, if, with the input control signal of a second value, the second address, differing as to the value of a predetermined bit from the first address, is determined to correspond to a fail cell, based on the predetermined information, only the cell of the second address is refreshed, without refreshing the cell of the first address, generated responsive to the refresh comma
    Type: Application
    Filed: May 11, 2007
    Publication date: September 6, 2007
    Applicant: ELPIDA MEMORY, INC.
    Inventor: Yasuhiro TAKAI
  • Patent number: 7257343
    Abstract: An additional image is formed on a recording medium by filling a predetermined area including a punched portion or a stapled portion, in addition to an image which is to be formed originally, such as a text document. The additional image is formed with white developer or transparent developer. Since the thickness of the recording medium is increased by the white developer or transparent developer forming the additional image portion, the region around the punched portion or the stapled portion is reinforced and the recording medium is kept from being broken easily. When the image and the additional image are superposed, the superposition of the image and the additional image is avoided by either reducing the image or changing the position of the image to be formed.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: August 14, 2007
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasuhiro Inoue, Shigeharu Maehara, Kazuya Iwabayashi, Yasuhiro Takai
  • Publication number: 20070165476
    Abstract: Each of identically configured logic inverter circuits 10a, 10b, 10c, and 10d comprises a PMOS transistor MP1 (abbreviated as MP1 hereinafter), and NMOS transistors MN1 and MN2 (abbreviated as MN1 and MN2 hereinafter). Gates of MP1 and MN1 are connected to input terminal IN1, gate of MN2 is connected to input terminal IN2, drains of MP1 and MN1 are connected to an output terminal OUT, source of MN1 is connected to the drain of MN2, source of MP1 is connected to a controllable power supply VC, and source of MN2 is grounded. Input terminals IN1 and IN2 of logic inverter circuits 10a, 10b, 10c, and 10d are connected to output terminals OUT of the logic inverter circuits 10b and 10c, 10c and 10d, 10d and 10a, and 10a and 10b respectively. High-speed four-phase clock signals are generated.
    Type: Application
    Filed: January 8, 2007
    Publication date: July 19, 2007
    Applicant: ELPIDA MEMORY, INC.
    Inventor: Yasuhiro Takai
  • Patent number: 7230870
    Abstract: Disclosed is a semiconductor memory device, in which the refresh period of a fail cell or cells is set so as to be shorter than that of the normal cells, comprises a control circuit for exercising control in such a manner that, if, when refreshing the cell of a first address, generated responsive to a refresh command, with an input control signal being of a first value, a second address, differing as to the value of a predetermined bit from the first address, is determined to correspond to a fail cell, based on the information ore-programmed in a refresh redundant ROM, the cell of the second address is refreshed, and also in such a manner that, if, with the input control signal of a second value, the second address, differing as to the value of a predetermined bit from the first address, is determined to correspond to a fail cell, based on the predetermined information, only the cell of the second address is refreshed, without refreshing the cell of the first address, generated responsive to the refresh comma
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: June 12, 2007
    Assignee: Elpida Memory, Inc.
    Inventor: Yasuhiro Takai
  • Publication number: 20070122212
    Abstract: A fixing apparatus that firmly adheres unfixed toner onto a recording sheet includes a first cleaning unit for cleaning up toner adhering to a surface of a heating roller by using a belt-shaped cleaning member, and a second cleaning unit for cleaning up toner adhering to a surface of a pressurizing roller by using a roller-shaped member, wherein oil for promoting releasability is not supplied from the first cleaning unit whose cleaning member is an oilless member to the heating roller, and the oil is supplied only from the roller-shaped member of the second cleaning unit to the pressurizing roller.
    Type: Application
    Filed: November 29, 2006
    Publication date: May 31, 2007
    Inventors: Tatsuya SHINKAWA, Kimihide Tsukamoto, Takashi Yamanaka, Kan Mukai, Yasuhiro Takai
  • Publication number: 20070116496
    Abstract: First eccentric cams (211, 221) for abutting an inner circumferential surface of an intermediate image transferring belt (11), second eccentric cams (212, 222) for rotating as a unit with the first eccentric cams (211, 221), cam followers (214, 224) for abutting a circumferential surface of the second eccentric cam (212, 222), and transmitting members (215A through 215D) for holding image transferring rollers (13A through 13D), moving in response to the cam followers (214, 224) are disposed within a loop-shaped moving path formed by an intermediate image transferring belt (11), which is stretched across a driving roller (11A) and a driven roller (11B). The vertical position of the image transferring rollers (13A through 13D), which are held by the transmitting members (215A through 215D), changes in accordance with the abutting state of the first eccentric cams (211, 221) with respect to an inner circumferential surface of the intermediate image transferring belt (11).
    Type: Application
    Filed: October 1, 2004
    Publication date: May 24, 2007
    Inventors: Shigenori Morimoto, Masanori Yamada, Yasuhiro Takai
  • Publication number: 20070102874
    Abstract: A paper processing device includes a processing unit, a paper ejection roller, a sorting mechanism, a paper overlapping mechanism, and a control unit. The processing unit performs predetermined processing upon sheets of paper being conveyed one at a time along a paper conveyance direction. The roller discharges the sheets in the paper conveyance direction, after completion of processing by the processing unit. The sorting mechanism shifts the roller to and fro between an initial position and a sorting position in a direction orthogonal to the paper conveyance direction. The overlapping mechanism superimposes, between the processing unit and the roller in the paper conveyance direction, a predetermined number of sheets of paper upon which processing has been completed. The control unit superimposes a predetermined number of sheets of paper by operating the overlapping mechanism, before shifting the roller from the initial position to the sorting position with the sorting mechanism.
    Type: Application
    Filed: November 1, 2006
    Publication date: May 10, 2007
    Inventors: Yasushi MATSUTOMO, Haruo Sayama, Kiwamu Morita, Michihiro Yamashita, Yuriko Kamei, Yasuhiro Takai
  • Publication number: 20070098445
    Abstract: In an image forming apparatus of the present invention, a scorotron charging device has a meshed grid electrode which is meshed more coarsely in a high-speed apparatus than a meshed grid electrode in a low-speed apparatus according to a circumferential velocity of a photoreceptor. With this arrangement, it is possible to charge the photoreceptor at a predetermined potential in the high-speed apparatus, without increase of the amount of ozone generation and upsizing of the image forming apparatus.
    Type: Application
    Filed: October 26, 2006
    Publication date: May 3, 2007
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Toshiki Takiguchi, Tatsuya Inoue, Hirokazu Yamauchi, Kazuhiro Matsuyama, Yasuhiro Takai
  • Publication number: 20070092271
    Abstract: An image forming apparatus includes a feeding portion, an image forming portion, a discharge portion, a paper transport path, a plurality of detection members, and a control portion. The image forming portion forms images on sheets of paper fed from the feeding portion. The path transports paper from the feeding portion to the discharge portion via the image forming portion. The detection members detect transport state of paper at respective locations on the path including the feeding portion, between the feeding and image forming portions, within the image forming portion, between the image forming and discharge portions, and the discharge portion. Upon detection of paper jam at any of the locations, the control portion displays, on an indicator, information identifying a location where the jam has occurred, and the image forming portion where paper is detected by the detection members, as locations of paper to be eliminated from the path.
    Type: Application
    Filed: October 23, 2006
    Publication date: April 26, 2007
    Inventors: Haruo Sayama, Yasushi Matsutomo, Kiwamu Morita, Michihiro Yamashita, Yuriko Kamei, Yasuhiro Takai
  • Patent number: 7180361
    Abstract: The antifuse programming circuit of the present invention includes a plurality of antifuses, a first transistor for selecting an antifuse for programming from among the plurality of antifuses, and a second transistor. A selection signal for selecting an antifuse is applied to the gate of the first transistor, and a first power supply is connected to the source of the first transistor. In addition, a second power supply is connected to the drain of the second transistor, and the drain of the first transistor is connected to the source of the second transistor. Finally, a programming voltage is applied to one terminal of the antifuse, and the drain of the first transistor is connected to the other terminal of the antifuse.
    Type: Grant
    Filed: October 6, 2004
    Date of Patent: February 20, 2007
    Assignee: Elpida Memory, Inc.
    Inventor: Yasuhiro Takai