Patents by Inventor Masakazu Miyata

Masakazu Miyata 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: 20210290904
    Abstract: A catheter assembly includes a catheter including an expandable and contractible tube provided with a lumen and a contact portion provided in a distal end portion of the tube. A stylet can be inserted in the lumen to make the tube expand in the longitudinal direction by coming into contact with the contact portion. A straight connector is provided on a proximal end side of the catheter which can be coupled to the stylet. The connector includes a male screw portion that is engageable with the stylet. The stylet includes a stylet hub disposed on the proximal end side of the catheter and a coupling member that couples the style hub and the straight connector to each other and is engageable with the male screw portion by rotating independently of the stylet hub.
    Type: Application
    Filed: June 9, 2021
    Publication date: September 23, 2021
    Inventors: Kenji Yokoyama, Masakazu Miyata, Kozo Hisamatsu
  • Publication number: 20210289116
    Abstract: An image processing apparatus includes processing circuitry configured to: divide an input image into a plurality of areas to correspond to predetermined categories, using information of the image; set different image processing parameters for the divided areas corresponding to the predetermined categories, respectively; perform image processing on the divided areas using the image processing parameters corresponding to the divided areas; and combine the divided areas on which the image processing has been performed to form an image.
    Type: Application
    Filed: January 21, 2021
    Publication date: September 16, 2021
    Applicant: Ricoh Company, Ltd.
    Inventors: Masashi MIYATA, Masakazu TERAUCHI
  • Patent number: 6684768
    Abstract: A stencil printing machine includes an image reading section, an image processing section for processing to convert image data into perforating data which is used for perforating a stencil sheet, an image perforating section for perforating the stencil sheet in accordance with the perforating data, a printing section for applying ink to a print sheet by using the perforated stencil sheet, and a data holding section for holding perforating data in stencil making operation as re-perforating data. When the number of print sheets comes to a predetermined number, the re-perforating data held in the data holding section is used to re-perforate another stencil sheet to exchange with the previous stencil sheet. The printing is again performed.
    Type: Grant
    Filed: January 18, 2001
    Date of Patent: February 3, 2004
    Assignee: Riso Kagaku Corporation
    Inventors: Masakazu Miyata, Masahiro Nishihata
  • Patent number: 6345573
    Abstract: In the multi-drum type rotary stencil printer adapted to drive a plurality of printing drums altogether in synchronization with one another by a common drive mechanism, when one of the printing drums is placed out of engagement with a printing, a degradation of ink is anticipated in the temporarily rested printing drum due to its excessive stirring during an idling rotation. In order to avoid such an ink degradation, a clutch is incorporated in a route of transmitting a driving force from the common drive mechanism to each of the printing drums, so that the transmission of the driving force through each of the route can be selectively interrupted.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: February 12, 2002
    Assignee: Riso Kagaku Corporation
    Inventors: Katsuro Motoe, Mitsuru Takeno, Masakazu Miyata
  • Publication number: 20020007739
    Abstract: A stencil printing machine 6 including an image reading section 2a, an image processing section 2c for processing to convert image data into binary perforating data which is used for perforating to a stencil sheet, an image perforating section 2b for thermally perforating the stencil sheet in accordance with image of the perforating data, a printing section 3 for transcribing ink to a print sheet by using the perforated stencil sheet and a data holding section 5 for holding perforating data in stencil making operation as re-perforating data simultaneously with the stencil making operation of the stencil sheet by the image perforating section 2b, in which when the print sheet is printed by a limited number of sheets or more, the re-perforating data held in the data holding section 5 is used by a control section 4 by input instruction from an operation panel section 1.
    Type: Application
    Filed: January 18, 2001
    Publication date: January 24, 2002
    Inventors: Masakazu Miyata, Masahiro Nishihata
  • Patent number: 6283021
    Abstract: According to the stencil making and attaching method of a printing device of the present invention, independent of variations in the detection of the stencil sheet set position detection sensor and variations in the clamped state due to curled stencil sheet, etc., it is possible to always set the image-formation start position of the stencil sheet at a regular position with respect to the drum rotation position, and consequently to improve the positional precision of the printing operation.
    Type: Grant
    Filed: September 11, 2000
    Date of Patent: September 4, 2001
    Assignee: Riso Kagaku Corporation
    Inventors: Hitoshi Watanabe, Kaoru Kimura, Masakazu Miyata
  • Patent number: 6227107
    Abstract: A stencil printer has a rotary printing drum removably supported in a printer body. A lamp is provided inside the printer body, and a control circuit permits, in response to an action necessary for maintenance of the printer body, the lamp means to be turned on.
    Type: Grant
    Filed: October 2, 1998
    Date of Patent: May 8, 2001
    Assignee: Riso Kagaku Corporation
    Inventors: Tetsuya Hashimoto, Toshihiro Bansyo, Masakazu Miyata, Hitoshi Watanabe
  • Patent number: 6105959
    Abstract: Overlapped paper feed can be detected easily and promptly. Along a paper feeding path, a light emitting element 1 and a light receiving sensor 2 are placed face to face and a detection signal corresponding to the light transmissivity of paper is output. The detection signal is not amplified by one system and amplified at a predetermined amplification ratio via an amplifying circuit 3 in the other system. An A/D converter 5a or 5b is set in each system and outputs the detection signal to a CPU 6 after sampling the detection signal. The CPU 6 detects overlapped feed by selecting the system whose detection signal value is within the effective range which is not effected by noise and not at a saturation level.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: August 22, 2000
    Assignee: Riso Kagaku Corporation
    Inventors: Masakazu Miyata, Mashiro Nishihata
  • Patent number: 6053495
    Abstract: A multiple feed detecting system is provided with a sheet thickness sensor which outputs thickness signals representing the thickness of a sheet to be conveyed, and a sheet size sensor which detects the size of the sheet to be conveyed as measured in the direction of conveyance. A detecting area is set according to the size of the sheet detected and whether multiple feed occurs is determined on the basis of sampling data obtained by the sheet thickness detecting sensor over the detecting area set.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: April 25, 2000
    Assignee: Riso Kagaku Corporation
    Inventors: Yoshikazu Hara, Masakazu Miyata, Masahiro Nishihata
  • Patent number: 6026744
    Abstract: In stencil printing, a printing matrix is thermally made in a printing matrix area on a stencil material on the basis of image information representing an image on an original. The printing matrix area is determined according to the sheet size of printing paper sheet. The stencil thus obtained is wrapped around a printing drum and a printing paper sheet fed toward the printing drum is pressed against the printing drum by a pressure member. A memory which is provided on the printing drum side stores information on the area of the printing matrix. The sheet size is compared with the area of the printing matrix based on information extracted from the memory. When the former is smaller than the latter, printing is inhibited and an error signal which advises against printing is output.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: February 22, 2000
    Assignee: Riso Kagaku Corporation
    Inventor: Masakazu Miyata
  • Patent number: 5608496
    Abstract: In order to indicate more distinctly the results of transverse and longitudinal adjustments of a print image, in a printer image position indicating device, a standard print position indication mark showing a printing master being positioned at the standard position relative to a print sheet and a biased print position indication mark showing a biased position of the printing master in either or both of the transverse and longitudinal directions relative to the standard position are expressed as marks each including at least two straight lines perpendicular to one another, and the biased print position indication mark is biased in the transverse and/or longitudinal directions according to a corresponding biasing of the printing master relative to the print sheet. The standard print position mark and the biased print position mark are expressed by different kinds of lines so as to clearly contrast one against the other.
    Type: Grant
    Filed: November 1, 1994
    Date of Patent: March 4, 1997
    Assignee: Riso Kagaku Corporation
    Inventors: Hiroshi Hanzawa, Yoshikazu Hara, Masakazu Miyata
  • Patent number: 5507225
    Abstract: In a stencil printer in which a printing drum is carried by a carrier mounted in a frame body of the printer to be transversely withdrawable from the frame body on its one side for maintenance, etc., the carrier is selectively engaged with a transverse position adjustment device at its operating position inside the frame body, wherein the transverse position adjustment device engages the carrier to adjust its transverse position for adjustment of transverse position of print image via a latching mechanism so that, when the carrier is to be disengaged from the transverse position adjustment device for the withdrawal, the transverse position adjustment device once shifts the carrier to its terminal biasing position toward the withdrawal direction and returns to its standard transverse position, while disengaging the latching mechanism at the moment of reversing its biasing movement.
    Type: Grant
    Filed: November 1, 1994
    Date of Patent: April 16, 1996
    Assignee: Riso Kagaku Corporation
    Inventors: Yoshihiro Noguchi, Hiroshi Hanzawa, Yoshikazu Hara, Masakazu Miyata
  • Patent number: 5441246
    Abstract: A cut sheet feeder for an image forming apparatus is basically formed of one sheet feed mechanism for picking up stacked cut sheets at a single sheet feed position, a sheet feed unit vertically movable relative to the sheet feed mechanism, a cassette detachably attached to the sheet feed unit and containing the cut sheets, and a sheet feed table vertically movably situated inside said sheet feed unit and carrying a large number of the cut sheets.. The feeder further includes a cassette presence detection device for detecting presence or absence of the cassette on the sheet feed unit, a cover detection device for indicating an opening status of a cover for the sheet feed unit, a mode establishment device for establishing a cassette feed mode or a table feed mode, and a mode control device for controlling the sheet feed unit.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: August 15, 1995
    Assignee: Riso Kagaku Corporation
    Inventors: Masakazu Miyata, Tomoko Nagano
  • Patent number: 5437443
    Abstract: A cut sheet feeder for use with an image forming apparatus is formed of a sheet feed mechanism for picking up stacked cut sheets one at a time from a single sheet feed position and for feeding each sheet to an image recording portion; a sheet feed unit which is vertically movable relative to the sheet feed mechanism and to which a cassette containing cut sheets may be attached in a detachable manner; a sheet feed table which is vertically movable within the sheet feed unit and which carries a large number of cut sheets; a cassette presence detection device for detecting the presence and absence of a cassette on the sheet feed unit and for outputting a signal indicating either the presence or the absence of the cassette; a power switch for starting and stopping the cut sheet feeder; and a mode establishment device.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: August 1, 1995
    Assignee: Riso Kagaku Corporation
    Inventors: Masakazu Miyata, Kosai Adachi, Tomoko Nagano
  • Patent number: 5435536
    Abstract: A cut sheet feeder for use with an image forming apparatus, is formed of: a sheet feed mechanism for picking up stacked cut sheets one at a time from a single sheet feed position and for feeding each sheet to an image recording portion; a sheet feed unit which is vertically movable relative to the sheet feed mechanism and to which a cassette containing cut sheets may be attached in a detachable manner; a sheet feed table which is vertically movable within the sheet feed unit and which carries a large number of cut sheets; a plurality of detectors for detecting the positions of the sheet feed unit, the sheet feed table and the cut sheets relative to the sheet feed position; and a sheet overload detector. The overload is detected by the detectors with respect to the relative position between the sheet feed unit and the sheet feed table with reference to the sheet feed position.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: July 25, 1995
    Assignee: Riso Kagaku Corporation
    Inventors: Kosai Adachi, Masakazu Miyata, Tomoko Nagano
  • Patent number: 5419243
    Abstract: In a rotary stencil printer in which a back press roller 12 is provided with a transverse groove 26 for receiving a transverse bar 16 of a printing drum 10 and a printing sheet applied with a printing at a nipping region 32 between the printing drum and the back press roller is transferred for a while as attached onto the cylindrical outer circumferential surface of the back press roller by a pinch roller or rollers 40 provided at an outlet side of the nipping region so as to press at a side edge portion or portions of the printing sheet against the outer circumferential surface of the back press roller, the position control of the pinch roller or rollers to conform to the sheet width is carried out in a condition that the pinch roller or rollers are aligned with the transverse groove of the back press roller.
    Type: Grant
    Filed: August 11, 1994
    Date of Patent: May 30, 1995
    Assignee: Riso Kagaku Corporation
    Inventors: Hiroshi Hanzawa, Yoshikazu Hara, Masakazu Miyata, Koji Nakayama