Patents by Inventor Ryosuke Miyachi

Ryosuke Miyachi 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: 12122637
    Abstract: A conveyance device includes a conveyance path having a curved portion and a pair of conveyers which are disposed in the conveyance path and convey a medium while nipping it, wherein the medium enters the pair of conveyers in a state of being at least partially curved in the curved portion, and the conveyance path guides the medium toward one of the pair of conveyers.
    Type: Grant
    Filed: March 2, 2022
    Date of Patent: October 22, 2024
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Ryosuke Miyachi, Yoshihisa Morita
  • Patent number: 12103804
    Abstract: A controller controls a floating unit and a conveyor to convey a sheet to a supply destination, and performs a following control of acquiring a detection value of a detector which detects an output signal acquired due to an input to a side of a sheet stack, during floating of sheets floated by the floating unit each time a sheet is conveyed by the conveyor and lifting a stacking tray upon the acquired detection value being less than a threshold value. The controller controls the floating unit and the conveyor to perform a feeding retry upon an occurrence of empty feeding in the conveyor, and determines the threshold value such that a target position for a height position of an upper surface of the sheet stack in the following control is a position where empty feeding is more likely to occur than multiple sheet feeding in the conveyor.
    Type: Grant
    Filed: December 15, 2021
    Date of Patent: October 1, 2024
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Yuzuru Iioka, Ryosuke Miyachi
  • Patent number: 11970358
    Abstract: A medium feeding mechanism includes a feeder that feeds a medium, a transportation path that is coupled to the feeder and includes a bent portion, a transporter that transports the medium on the transportation path, and a transportation control unit that controls the transporter, wherein the transportation control unit adjusts a transportation velocity of the medium transported by the transporter on the basis of medium information of the medium and a transportation route shape for the medium.
    Type: Grant
    Filed: May 17, 2021
    Date of Patent: April 30, 2024
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Ryosuke Miyachi, Yuzuru Iioka
  • Publication number: 20240109316
    Abstract: A droplet ejection control apparatus includes a head unit in which a plurality of vertically arranged nozzle groups in which a plurality of nozzles for ejecting droplets onto a predetermined target of ejection are arranged in the vertical direction; and a control unit for controlling ejection of the droplets from the nozzles. The control unit controls ejection of the droplets for vertically adjacent nozzle groups such that an amount of ejection from at least one nozzle of a vertically upper nozzle group at a joint portion between nozzle groups is reduced, and an amount of ejection from at least one nozzle at the joint portion between the nozzle groups of a vertically lower nozzle group is increased.
    Type: Application
    Filed: September 18, 2023
    Publication date: April 4, 2024
    Applicant: RISO KAGAKU CORPORATION
    Inventor: Ryosuke MIYACHI
  • Patent number: 11912522
    Abstract: A discharge tray for loading thereon sheets to be discharged at a predetermined discharge angle by a discharge roller pair is provided. The discharge tray includes a loading surface provided at a predetermined first inclination angle with respect to a discharge direction of a sheet by the discharge roller pair so that a top of the sheet discharged by the discharge roller pair comes into contact with the loading surface, and a guide unit provided on the loading surface at a second inclination angle with respect to the loading surface so as to partially lift up the loaded sheet from the loading surface.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: February 27, 2024
    Assignee: RISO KAGAKU CORPORATION
    Inventor: Ryosuke Miyachi
  • Publication number: 20230356530
    Abstract: An inkjet printer includes: an inkjet head having a nozzle row in which nozzles configured to eject ink are arranged, the inkjet head being configured to perform printing by ejecting ink from the nozzles in a state where a row direction of the nozzles in the nozzle row is a non-horizontal direction; an ink tank configured to receive a pressure for delivering ink to the inkjet head or for recovering ink from the inkjet head; and an ink path connecting the ink tank with the inkjet head. The printing is performed in a state where a parameter related to a flow path resistance of the ink path is set such that a nozzle pressure of each of the nozzles at a time of printing is within a prescribed range enabling ink to be stably ejected and ink flows at a flow rate required for the inkjet head.
    Type: Application
    Filed: March 13, 2023
    Publication date: November 9, 2023
    Applicant: RISO KAGAKU CORPORATION
    Inventor: Ryosuke MIYACHI
  • Publication number: 20220289507
    Abstract: A conveyance device includes a conveyance path having a curved portion and a pair of conveyers which are disposed in the conveyance path and convey a medium while nipping it, wherein the medium enters the pair of conveyers in a state of being at least partially curved in the curved portion, and the conveyance path guides the medium toward one of the pair of conveyers.
    Type: Application
    Filed: March 2, 2022
    Publication date: September 15, 2022
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Ryosuke MIYACHI, Yoshihisa MORITA
  • Publication number: 20220194723
    Abstract: A controller controls a floating unit and a conveyor to convey a sheet to a supply destination, and performs a following control of acquiring a detection value of a detector which detects an output signal acquired due to an input to a side of a sheet stack, during floating of sheets floated by the floating unit each time a sheet is conveyed by the conveyor and lifting a stacking tray upon the acquired detection value being less than a threshold value. The controller controls the floating unit and the conveyor to perform a feeding retry upon an occurrence of empty feeding in the conveyor, and determines the threshold value such that a target position for a height position of an upper surface of the sheet stack in the following control is a position where empty feeding is more likely to occur than multiple sheet feeding in the conveyor.
    Type: Application
    Filed: December 15, 2021
    Publication date: June 23, 2022
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Yuzuru IIOKA, Ryosuke MIYACHI
  • Publication number: 20210371222
    Abstract: A medium feeding mechanism includes a feeder that feeds a medium, a transportation path that is coupled to the feeder and includes a bent portion, a transporter that transports the medium on the transportation path, and a transportation control unit that controls the transporter, wherein the transportation control unit adjusts a transportation velocity of the medium transported by the transporter on the basis of medium information of the medium and a transportation route shape for the medium.
    Type: Application
    Filed: May 17, 2021
    Publication date: December 2, 2021
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Ryosuke MIYACHI, Yuzuru IIOKA
  • Patent number: 11141991
    Abstract: An inkjet printing device includes an inkjet head that ejects ink to paper to be transported, a blocking unit that blocks ink mist on a downstream side of the inkjet head in a transport direction of paper, an ink mist collection mechanism and a belt platen that collect ink mist blocked by the blocking unit.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: October 12, 2021
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Hiroki Endo, Hiroshi Sugitani, Ryosuke Miyachi
  • Publication number: 20200307940
    Abstract: A discharge tray for loading thereon sheets to be discharged at a predetermined discharge angle by a discharge roller pair is provided. The discharge tray includes a loading surface provided at a predetermined first inclination angle with respect to a discharge direction of a sheet by the discharge roller pair so that a top of the sheet discharged by the discharge roller pair comes into contact with the loading surface, and a guide unit provided on the loading surface at a second inclination angle with respect to the loading surface so as to partially lift up the loaded sheet from the loading surface.
    Type: Application
    Filed: March 19, 2020
    Publication date: October 1, 2020
    Applicant: RISO KAGAKU CORPORATION
    Inventor: Ryosuke MIYACHI
  • Patent number: 10704305
    Abstract: A door opening/closing device including a door, a locking hook mounted on an inner surface of the door, a solenoid mounted in a device housing, a locking lever connected swingably to a movable iron core of the solenoid and having a free end on an opposite side of a connection portion, and a controller for controlling the solenoid, in which the controller executes control so as to, if the door is closed and locked, separate the locking lever from the locking hook to release locking in conjunction with the movable iron core retreated by an electromagnetic attracting force by executing conduction control of the solenoid, and maintain an unlocked state while the door is closed by executing non-conduction control of the solenoid after unlocking and bringing the free end of the locking lever into contact with the locking hook by a return spring force.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: July 7, 2020
    Assignee: RISO KAGAKU CORPORATION
    Inventor: Ryosuke Miyachi
  • Publication number: 20200164659
    Abstract: An inkjet printing device includes an inkjet head that ejects ink to paper to be transported, a blocking unit that blocks ink mist on a downstream side of the inkjet head in a transport direction of paper, an ink mist collection mechanism and a belt platen that collect ink mist blocked by the blocking unit.
    Type: Application
    Filed: October 30, 2019
    Publication date: May 28, 2020
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Hiroki ENDO, Hiroshi SUGITANI, Ryosuke MIYACHI
  • Publication number: 20160215539
    Abstract: A door opening/closing device including a door, a locking hook mounted on an inner surface of the door, a solenoid mounted in a device housing, a locking lever connected swingably to a movable iron core of the solenoid and having a free end on an opposite side of a connection portion, and a controller for controlling the solenoid, in which the controller executes control so as to, if the door is closed and locked, separate the locking lever from the locking hook to release locking in conjunction with the movable iron core retreated by an electromagnetic attracting force by executing conduction control of the solenoid, and maintain an unlocked state while the door is closed by executing non-conduction control of the solenoid after unlocking and bringing the free end of the locking lever into contact with the locking hook by a return spring force.
    Type: Application
    Filed: January 20, 2016
    Publication date: July 28, 2016
    Inventor: Ryosuke MIYACHI
  • Patent number: 8441596
    Abstract: This invention provides a liquid crystal display device where the brightness of the backlight can be prevented from lowering when the liquid crystal display device and its frame are thin. The liquid crystal display device has a liquid crystal display panel and a backlight for radiating light on the rear of the liquid crystal display panel, and is characterized in that the backlight has light emitting diodes LED that are secured on one surface of a flexible printed circuit FPC and a light guide plate for guiding light emitted from the light emitting diodes, the flexible printed circuit has openings in a portion between the light emitting diodes and the light guide plate, which extends partly over the light emitting areas (EA) of the light emitting diodes, and a reflective member is provided on the other surface of the flexible printed circuit so as to cover the openings.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: May 14, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Yasuhisa Shiraishi, Ryosuke Miyachi
  • Publication number: 20110164202
    Abstract: This invention provides a liquid crystal display device where the brightness of the backlight can be prevented from lowering when the liquid crystal display device and its frame are thin. The liquid crystal display device has a liquid crystal display panel and a backlight for radiating light on the rear of the liquid crystal display panel, and is characterized in that the backlight has light emitting diodes LED that are secured on one surface of a flexible printed circuit FPC and a light guide plate for guiding light emitted from the light emitting diodes, the flexible printed circuit has openings in a portion between the light emitting diodes and the light guide plate, which extends partly over the light emitting areas (EA) of the light emitting diodes, and a reflective member is provided on the other surface of the flexible printed circuit so as to cover the openings.
    Type: Application
    Filed: January 5, 2011
    Publication date: July 7, 2011
    Inventors: Yasuhisa SHIRAISHI, Ryosuke Miyachi