Patents by Inventor Masakazu Fujita

Masakazu Fujita 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).

  • Patent number: 11360421
    Abstract: A sheet sorting device includes a plurality of trays, a tray shifter, a tray stop position detector, and circuitry. The plurality of trays is disposed in multiple stages in a vertical direction and configured to stack a sheet. The tray shifter is configured to move the plurality of trays separately in a tray shift direction. The tray stop position detector is configured to detect stop positions of the plurality of trays separately. The circuitry is configured to cause the tray shifter to move the plurality of trays to home positions in an initial operation, at least one tray having a home position opposite to a home position of another tray in the tray shift direction. The circuitry is configured to, while moving the plurality of trays at a same time in the initial operation, cause the tray shifter to move the trays in directions opposite to each other.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: June 14, 2022
    Assignee: Ricoh Company, Ltd.
    Inventors: Masakazu Fujita, Yasushi Tsuruoka, Takamasa Matsumoto, Hiroaki Utagawa, Ryohsuke Akaishi, Hisayoshi Sugawara
  • Publication number: 20200310321
    Abstract: A sheet sorting device includes a plurality of trays, a tray shifter, a tray stop position detector, and circuitry. The plurality of trays is disposed in multiple stages in a vertical direction and configured to stack a sheet. The tray shifter is configured to move the plurality of trays separately in a tray shift direction. The tray stop position detector is configured to detect stop positions of the plurality of trays separately. The circuitry is configured to cause the tray shifter to move the plurality of trays to home positions in an initial operation, at least one tray having a home position opposite to a home position of another tray in the tray shift direction. The circuitry is configured to, while moving the plurality of trays at a same time in the initial operation, cause the tray shifter to move the trays in directions opposite to each other.
    Type: Application
    Filed: March 19, 2020
    Publication date: October 1, 2020
    Applicant: Ricoh Company, Ltd.
    Inventors: Masakazu FUJITA, Yasushi TSURUOKA, Takamasa MATSUMOTO, Hiroaki UTAGAWA, Ryohsuke AKAISHI, Hisayoshi SUGAWARA
  • Patent number: 9819280
    Abstract: An inverter device applies an excitation current to an excitation winding of a step-up transformer through a switching element, and outputs an output voltage with an alternating-current half-wave waveform from an output winding of the step-up transformer. The inverter device includes: an input-voltage detecting unit that detects a state of the input voltage, as a voltage; a current detecting unit that converts a current flowing through the switching element into a voltage to detects the current; and a comparing unit that compares a detected current value detected by the current detecting unit with a detected input voltage value detected by the input-voltage detecting unit, and detects a high-current period in which the detected current value exceeds the detected input voltage value. Based on information indicating the high-current period detected by the comparing unit, the control circuit adjusts a period in which the switching element is turned on.
    Type: Grant
    Filed: February 15, 2016
    Date of Patent: November 14, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Hisahiro Kamata, Yoshiyuki Shishido, Masakazu Fujita
  • Patent number: 9453860
    Abstract: An inverter device includes: a simulation output voltage generation unit that generates a simulation output voltage that corresponds to an instantaneous value of an alternating current output voltage and that has a waveform whose peak value is smaller than a peak value of the output voltage; a circuit that generates a peak value detection voltage by rectifying and smoothing the simulation output voltage; and a monitor circuit that compares the peak value detection voltage, or a voltage obtained by dividing the peak value detection voltage, with a reference voltage and transmits a feedback signal according to the result of the comparison to the control circuit. The control circuit changes a duty ratio of a switching signal for performing on/off control on the switching element in accordance with the feedback signal and controls the peak value detection voltage to keep a given value.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: September 27, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventor: Masakazu Fujita
  • Publication number: 20160248336
    Abstract: An inverter device applies an excitation current to an excitation winding of a step-up transformer through a switching element, and outputs an output voltage with an alternating-current half-wave waveform from an output winding of the step-up transformer. The inverter device includes: an input-voltage detecting unit that detects a state of the input voltage, as a voltage; a current detecting unit that converts a current flowing through the switching element into a voltage to detects the current; and a comparing unit that compares a detected current value detected by the current detecting unit with a detected input voltage value detected by the input-voltage detecting unit, and detects a high-current period in which the detected current value exceeds the detected input voltage value. Based on information indicating the high-current period detected by the comparing unit, the control circuit adjusts a period in which the switching element is turned on.
    Type: Application
    Filed: February 15, 2016
    Publication date: August 25, 2016
    Applicant: Ricoh Company, Ltd.
    Inventors: Hisahiro Kamata, Yoshiyuki Shishido, Masakazu Fujita
  • Publication number: 20160020704
    Abstract: An inverter device includes: a simulation output voltage generation unit that generates a simulation output voltage that corresponds to an instantaneous value of an alternating current output voltage and that has a waveform whose peak value is smaller than a peak value of the output voltage; a circuit that generates a peak value detection voltage by rectifying and smoothing the simulation output voltage; and a monitor circuit that compares the peak value detection voltage, or a voltage obtained by dividing the peak value detection voltage, with a reference voltage and transmits a feedback signal according to the result of the comparison to the control circuit. The control circuit changes a duty ratio of a switching signal for performing on/off control on the switching element in accordance with the feedback signal and controls the peak value detection voltage to keep a given value.
    Type: Application
    Filed: July 9, 2015
    Publication date: January 21, 2016
    Inventor: Masakazu FUJITA
  • Publication number: 20080307985
    Abstract: A stencil printing apparatus allowing double-side printing able to suppress the drop in work efficiency caused by the occurrence of through-jam during a double-side printing operation, which includes: a printing portion having a plate cylinder and pressing means; a paper discharging portion, paper refeeding means for temporarily housing and then refeeding paper sheets on which an image has been formed on one side to the paper discharging portion; and switching means for guiding the paper sheets to either the paper discharging portion or paper refeeding means, and which performs a front-side printing step in which a front-side image is printed on one side of a paper sheet, and a rear-side printing step in which this paper sheet is fed to paper refeeding means, and refed from paper refeeding means to the printing portion, and then a rear-side image is printed on the other side of the paper sheet.
    Type: Application
    Filed: March 3, 2008
    Publication date: December 18, 2008
    Applicant: Tohoku Ricoh Co., Ltd.
    Inventor: Masakazu FUJITA
  • Patent number: 7098677
    Abstract: A conductor is disposed within an area where electric coupling and magnetic coupling take place between the conductor and a device-under-test (DUT) in at least a portion of frequency band width, and the value of composite currents that is outputted in a plurality of directions different from each other against the DUT, is measured. Based on the measured plurality of values of the composite currents, the first electric current due to electric coupling between the DUT and the conductor and the second electric current due to magnetic coupling between the DUT and the conductor are calculated. From these first and second electric current values, electric field intensity and magnetic field intensity are calculated.
    Type: Grant
    Filed: August 15, 2005
    Date of Patent: August 29, 2006
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Satoshi Kazama, Masakazu Fujita, Masayuki Shimizu
  • Publication number: 20060033510
    Abstract: A conductor is disposed within an area where electric coupling and magnetic coupling take place between the conductor and a device-under-test (DUT) in at least a portion of frequency band width, and the value of composite currents that is outputted in a plurality of directions different from each other against the DUT, is measured. Based on the measured plurality of values of the composite currents, the first electric current due to electric coupling between the DUT and the conductor and the second electric current due to magnetic coupling between the DUT and the conductor are calculated. From these first and second electric current values, electric field intensity and magnetic field intensity are calculated.
    Type: Application
    Filed: August 15, 2005
    Publication date: February 16, 2006
    Applicant: TAIYO YUDEN CO., LTD.
    Inventors: Satoshi Kazama, Masakazu Fujita, Masayuki Shimizu
  • Patent number: 6975111
    Abstract: A conductor is disposed within an area where electric coupling and magnetic coupling take place between the conductor and a device-under-test (DUT) in at least a portion of frequency band width, and the value of composite currents that is outputted in a plurality of directions different from each other against the DUT, is measured. Based on the measured plurality of values of the composite currents, the first electric current due to electric coupling between the DUT and the conductor and the second electric current due to magnetic coupling between the DUT and the conductor are calculated. From these first and second electric current values, electric field intensity and magnetic field intensity are calculated.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: December 13, 2005
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Satoshi Kazama, Masakazu Fujita, Masayuki Shimizu
  • Publication number: 20040251589
    Abstract: Provided is a bulk paper feeding device with an intermediate conveyor comprising a carrier capable of carrying a large quantity of paper, a paper feeding mechanism for picking up and feeding one sheet at a time of the paper from the carrier, and an intermediate conveyor for transporting a sheet of paper fed from the feeding mechanism to the main paper feeding table of the paper feeder on the body of the image forming device or to the vicinity of a paper feeding port that faces the main paper feeding means of the paper feeder.
    Type: Application
    Filed: March 10, 2004
    Publication date: December 16, 2004
    Applicant: Tohoku Ricoh Co., Ltd.
    Inventors: Keiichi Satoh, Mituru Takahashi, Takenobu Kamata, Hitoshi Kimura, Masakazu Fujita, Tomotaka Osada, Yoshiyuki Araseki
  • Publication number: 20030006786
    Abstract: A conductor is disposed within an area where electric coupling and magnetic coupling take place between the conductor and a device-under-test (DUT) in at least a portion of frequency band width, and the value of composite currents that is outputted in a plurality of directions different from each other against the DUT, is measured. Based on the measured plurality of values of the composite currents, the first electric current due to electric coupling between the DUT and the conductor and the second electric current due to magnetic coupling between the DUT and the conductor are calculated. From these first and second electric current values, electric field intensity and magnetic field intensity are calculated.
    Type: Application
    Filed: September 10, 2002
    Publication date: January 9, 2003
    Applicant: Taiyo Yuden Co., Ltd.
    Inventors: Satoshi Kazama, Masakazu Fujita, Masayuki Shimizu
  • Patent number: 6456070
    Abstract: A conductor is disposed within an area where electric coupling and magnetic coupling take place between the conductor and a device-under-test (DUT) in at least a portion of frequency band width, and the value of composite currents that is outputted in a plurality of directions different from each other against the DUT, is measured. Based on the measured plurality of values of the composite currents, the first electric current due to electric coupling between the DUT and the conductor and the second electric current due to magnetic coupling between the DUT and the conductor are calculated. From these first and second electric current values, electric field intensity and magnetic field intensity are calculated.
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: September 24, 2002
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Satoshi Kazama, Masakazu Fujita, Masayuki Shimizu
  • Patent number: 6433167
    Abstract: A triazolo-1,4-diazepine compound having the formula (I): wherein A represents CO, CO—B, or B, B represents a C1 to C6 alkylene group or a C2 to C6 alkylene group having an oxygen atom interposed in the middle thereof, X represents N—O or CH, n represents an integer of 2 to 6, R represents a hydroxyl group, a C1 to C6 lower alkyloxy group or a C1 to C6 lower alkylamino group, provided that these groups may be substituted with an N,N-dimethylamino group, an N,N-diethylamino group, a phenyl group, or a heterocyclic group, and R1 represents a hydrogen atom or a C1 to C3 lower alkyl group having both a PAF antagonistic action and a thromboxane synthesis inhibiting action, and a pharmaceutical composition containing the same as an active ingredient.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: August 13, 2002
    Assignee: Nikken Chemicals Co., Ltd.
    Inventors: Masakazu Fujita, Taketsugu Seki, Haruaki Inada, Tetsuro Sano
  • Patent number: 5935882
    Abstract: The present invention provides protective goods, for example arctic clothing which allows long-time working even under the low temperature environment; said protective goods being characterized by excellent workability, heat-insulation and anti-static feature, without being hardened and embrittled, especially at the temperature of -10 degrees Celsius or below, further, under the environment of very low temperature such levels as -30 degrees Celsius or -60 degrees Celsius, furthermore even under the environment of extremely-low temperature on the level of -100 to -250 degrees Celsius.
    Type: Grant
    Filed: June 4, 1998
    Date of Patent: August 10, 1999
    Assignee: Teijin Limited
    Inventors: Masakazu Fujita, Yoshio Wakuta, Shiro Kumakawa
  • Patent number: 5843950
    Abstract: A 1,4-dihydropyridine compound having the formula (I): ##STR1## wherein, R.sup.1 indicates --COO--A--(3-pyridyl), A indicates a C.sub.3 -C.sub.6 straight chain alkylene group in which one piperazine may be interposed; R.sup.2 indicates a C.sub.2 -C.sub.10 alkyl group, alkenyl group or alkynyl group; a lower alkyl group or lower alkenyl group having a substituent; or a cycloalkyl group which may have a substituent; R.sup.3 indicates the same group as R.sup.1 or --COO--R.sup.4 ; and R.sup.4 indicates a lower alkyl group which may have a substituent or its pharmacologically acceptable salt and an anti-allergenic drug, antiphlogistic, drug for overcoming resistance to anti-cancer drugs, or drug for reinforcing the effect of anti-cancer drugs containing the same as effective ingredients.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: December 1, 1998
    Assignee: Nikken Chemicals Co., Ltd.
    Inventors: Shigeyuki Tasaka, Teruhisa Miura, Akira Kiue, Taketsugu Seki, Tetsuro Sano, Mie Kamakura, Masakazu Fujita
  • Patent number: 5311276
    Abstract: An apparatus for detecting flaws generated in the cut edges of cut glass plates is disclosed. The light emitted from a linear light source (11 and 21) and transmitted and reflected by a glass plate (1) is received by a one-dimensional imaging device (12 and 22), and the flaws in the cut edges of the glass plate are detected by a discriminator (13 and 24) based on the output voltage of the one-dimensional imaging device. The linear light source and the one-dimensional imaging device are disposed in such a manner that the longitudinal direction of the linear light source and the arranging direction of the imaging elements of the one-dimensional imaging device are parallel with each other, and that the longitudinal direction of the linear light source and the arranging direction of the imaging elements of the one-dimensional imaging device are oblique to the travelling direction of the glass plate on a plane parallel with the glass plate.
    Type: Grant
    Filed: August 11, 1989
    Date of Patent: May 10, 1994
    Assignee: Nippon Sheet Glass Co., Ltd.
    Inventors: Igisu Masao, Yoshiomi Toyota, Shoichi Kondo, Masakazu Fujita, Hideo Kizuka, Kenkichi Sato
  • Patent number: 5141811
    Abstract: An elastic synthetic polymer filament having a multi-lobated cross-sectional profile is composed of (A) a filamentary axial constituent extending along the longitudinal axis of the filament, and (B) 3 to 8 filamentary lobe constituents radically protruding from and extending along the filamentary axial constituent each having a constricted portion thereof through which each filamentary lobe constituent is connected to the filamentary axial constituent, the cross-section of the filament satisfying the relationship (I):1.3.ltoreq.d.sub.1 /w.ltoreq.10 (I)wherein d.sub.1 is a largest cross-sectional width of each filamentary lobe constituent (C).
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: August 25, 1992
    Assignee: Teijin Limited
    Inventors: Kenji Kawakami, Hiroyuki Nagai, Masakazu Fujita
  • Patent number: 4976097
    Abstract: Disclosed is a level-dyeable mixed false-twisted filament yarn composed of larger denier multifilaments (1) having a denier of 1 to 2.5 and smaller denier multifilaments (2) having a denier of 0.6 or less, which is characterized in that (a) the yarn comprises entangled portions (I) thereof whereat the larger denier filaments and the smaller denier filaments are entangled with one another and opened portions (II) thereof comprising a core composed of the larger denier filaments and a covering composed of the smaller denier filaments, (b) in the coverings of the opened portions, net-like parts thereof are formed by the smaller denier filaments extending obliquely to the longitudinal axis of the yarn and intersecting one another, and scattered therein, (c) the length L.sub.1 of the opened portions is longer than the length L.sub.
    Type: Grant
    Filed: August 15, 1989
    Date of Patent: December 11, 1990
    Assignee: Teijin Limited
    Inventors: Masaaki Yanagihara, Katsutoshi Taniguchi, Masakazu Fujita
  • Patent number: 4110048
    Abstract: A method of and an apparatus for inspecting a traveling sheet material, in which the ability to detect a defect is made as close to the identifying ability of man's visual inspection as possible, the detected defect is converted into an electrical signal and separated into four factors of width, quantity, depth or density, and length to make the sorting process most economical, the factors are discriminated to be of high, medium or low class, respectively, and the discriminated defect factors are synthetically judged through a decision circuit according to a defect pattern.
    Type: Grant
    Filed: July 16, 1976
    Date of Patent: August 29, 1978
    Assignees: Kawasaki Steel Corporation, Toei Denshi Kogyo Kabushiki Kaisha
    Inventors: Shoji Akutsu, Yasumasa Watanabe, Yasuhiko Mashino, Tomohiro Chaki, Masakazu Fujita