Patents Assigned to Riso Kagaku Corporation
  • 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: 20240116289
    Abstract: A transfer medium producing apparatus is equipped with an ink ejection unit 20 that ejects ink onto a peelable sheet, an adhesive solution application unit 30 that applies an adhesive solution onto the peelable sheet onto which the ink has been ejected, and a control unit 2 that controls the ejection of ink and the application of the adhesive solution to be performed by a wet on wet method.
    Type: Application
    Filed: September 18, 2023
    Publication date: April 11, 2024
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Hiroyuki TAKEUCHI, Mamoru FUKUDA
  • 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
  • Publication number: 20240100840
    Abstract: An inkjet printer includes: an inkjet head configured to eject ink to a print medium being conveyed; a mist collector including at least a suction port configured to suck air from a side of the inkjet head on which the print medium passes; and a controller configured to control the mist collector. A space on the side of the inkjet head on which the print medium passes is an open space in which nothing but the print medium passing is arranged within a prescribed distance from the inkjet head. The controller is configured to control the mist collector to perform a mist collection operation of sucking air containing ink mist via the suction port in a state where the print medium and the inkjet head are facing each other.
    Type: Application
    Filed: August 30, 2023
    Publication date: March 28, 2024
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Ryosuke NISHIKAWA, Takeshi HIGUCHI
  • Publication number: 20240092086
    Abstract: A liquid supply apparatus includes: a liquid container; branch paths branching from a path connected to the liquid container, the branch paths being connected to tanks arranged at height positions different from one another and lower than the liquid container; supply valves arranged in the branch paths respectively; and a controller configured to control the supply valves to supply a liquid from the liquid container to each of the tanks. The controller is configured to control the supply valves to temporally separately perform supply of the liquid to tanks of the tanks having a height difference equal to or more than a prescribed value therebetween.
    Type: Application
    Filed: July 6, 2023
    Publication date: March 21, 2024
    Applicant: RISO KAGAKU CORPORATION
    Inventor: Ryosuke NISHIKAWA
  • Patent number: 11932511
    Abstract: A medium feeding mechanism includes: a feeder that feeds a medium; a transport path that is coupled to the feeder; a transporter that transports the medium through the transport path; a transport drive that drives the transporter; an entry detection sensor that detects when the medium fed from the feeder has entered the transport path; a take-in transporter that takes in the medium transported by the transporter; and a transport controller that controls the feeder and the take-in transporter, wherein when the entry detection sensor detects entry of the medium at a time that falls within a first range set in advance, the controller controls the take-in transporter so as to take in the medium, and when the entry detection sensor detects entry of the medium at a time that falls within a second range following the first range.
    Type: Grant
    Filed: December 21, 2021
    Date of Patent: March 19, 2024
    Assignee: RISO KAGAKU CORPORATION
    Inventor: Yuzuru Iioka
  • Publication number: 20240075734
    Abstract: An inkjet printer includes nozzle arrays and a controller. Each of the nozzle arrays includes nozzles arranged in a row along a nozzle array direction. The nozzle arrays are arranged in parallel with each other in a direction perpendicular to the nozzle array direction. The controller is configured to perform such control that in a case where the nozzle arrays include a first nozzle array including a non-ejection nozzle, a defect in a printed image due to the non-ejection nozzle is interpolated by using ejection of an ink by a first nozzle and at least one second nozzle in a second nozzle array different from the first nozzle array among the nozzle arrays, the first nozzle being at a position corresponding to a pixel onto which the non-ejection nozzle is intended to eject an ink, the at least one second nozzle being adjacent to the first nozzle.
    Type: Application
    Filed: August 3, 2023
    Publication date: March 7, 2024
    Applicant: RISO KAGAKU CORPORATION
    Inventor: Kenji SHIMOMURA
  • 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
  • Patent number: 11878894
    Abstract: A sheet discharger includes: an accommodator configured to accommodate sheets; a conveyor configured to convey and discharge a sheet to the accommodator; a detector configured to detect whether a jam of a sheet has occurred in the accommodator and a state of the jam; and a controller configured to control the conveyor to continue sheet discharge upon detection by the detector of the jam in a state where sheet discharge of a jammed sheet is possible.
    Type: Grant
    Filed: January 28, 2022
    Date of Patent: January 23, 2024
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Masashi Hara, Yoshifumi Noguchi, Yoshiyuki Okada
  • Patent number: 11850843
    Abstract: A printing system, including a first printing part, a second printing part that is disposed downstream of the first printing part in the conveying direction of a medium, and a conveyance mechanism that conveys the medium The conveyance mechanism includes a passage detection sensor, a conveyor roller, and a resist roller that is disposed downstream in the conveying direction from the passage detection sensor and the conveyor roller, that is butted by the medium, and that conveys the medium slackened due to the butting. The printing system further includes a controller configured to control the conveyor roller so that the slack amount of the subsequent medium is constant based on the conveyance status of the preceding medium and the detection time of the leading edge of the subsequent medium detected by the passage detection sensor.
    Type: Grant
    Filed: March 2, 2022
    Date of Patent: December 26, 2023
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Akihiro Yamagata, Ryo Terakado, Hirokazu Yabune
  • 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
  • Patent number: 11781268
    Abstract: A method for producing a printed textile item is disclosed, the method including applying a pretreatment liquid containing a coagulant, water and a surfactant to a fabric, and, after the application of the pretreatment liquid, applying a white ink containing a white pigment and water to the fabric by an inkjet method, wherein a surface tension of the white ink at 0.05 Hz is within a range from 33 to 39 mN/m, a surface tension of the white ink at 10 Hz is 40 mN/m or greater, a specific gravity of the pretreatment liquid is greater than a specific gravity of the white ink, and the application of the white ink is performed within 100 seconds from the application of the pretreatment liquid and by a wet-on-wet method.
    Type: Grant
    Filed: May 31, 2022
    Date of Patent: October 10, 2023
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Tetsuya Shiraishi, Akiko Hayashi, Kokoro Kinoe, Takahisa Yamazaki, Ryo Shinotsuka, Takumi Matsuda
  • Publication number: 20230312287
    Abstract: A medium feeding device includes a feeder that feeds a medium, a medium detection sensor that detects the medium fed by the feeder, and a processor that changes feed settings of the feeder based on a detection result of the medium detection sensor, wherein the processor switches a feed setting to be changed among a plurality of the feed settings of the feeder based on the detection result of the medium detection sensor.
    Type: Application
    Filed: March 7, 2023
    Publication date: October 5, 2023
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Ryuichi SHIBATA, Yoshifumi NOGUCHI, Masashi HARA
  • Patent number: 11772922
    Abstract: A conveying apparatus includes a conveyor and a conveyed object receptor. The conveyor includes a conveyance surface facing downward and configured to convey a conveyed object having a sheet-like shape. The conveyed object receptor is arranged below the conveyor and configured to receive the conveyed object having fallen from the conveyor.
    Type: Grant
    Filed: October 21, 2021
    Date of Patent: October 3, 2023
    Assignee: RISO KAGAKU CORPORATION
    Inventor: Hiroki Fuwa
  • Publication number: 20230294427
    Abstract: A conveying device which is disposed so as to face an image forming unit that performs image formation on a medium and which conveys the medium while sucking the medium, the conveying device including: a conveying surface having a suction region that sucks the medium, wherein the suction region includes a first suction region including a region that faces an entirety of the image forming unit along a conveying direction of the medium, and a second suction region located on an upstream side of the first suction region in a conveying direction, the second suction region sucking the medium with a stronger sucking force than the first suction region.
    Type: Application
    Filed: March 7, 2023
    Publication date: September 21, 2023
    Applicant: RISO KAGAKU CORPORATION
    Inventor: Yuki HOSOE
  • Publication number: 20230294448
    Abstract: An apparatus for producing a transfer medium is equipped with: a printing unit that receives image data that represents an image to be printed and prints a print image onto a peelable sheet based on the image data; an adhesive liquid coating unit that coats an adhesive liquid on the peelable sheet on which the print image has been printed; and a control unit that controls the adhesive liquid coating unit such that an adhesive liquid is coated onto a printed image within a transfer region, from between the transfer region to be transferred onto a target medium for transfer and a non-transfer region not to be transferred onto the target medium for transfer, which are included in the printed image.
    Type: Application
    Filed: March 8, 2023
    Publication date: September 21, 2023
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Mamoru FUKUDA, Shoji NARAMOTO
  • Patent number: 11739229
    Abstract: A treatment liquid for a screen printing plate is disclosed that contains a resin, water, a surfactant A, and a surfactant B having a solubility in water lower than a solubility of the surfactant A in water. A method for treating a screen printing plate is also disclosed.
    Type: Grant
    Filed: May 12, 2021
    Date of Patent: August 29, 2023
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Nami Ohashi, Yuki Imaichi, Hirotaka Tominaga, Hiroshi Hayashi
  • Publication number: 20230256766
    Abstract: A printing apparatus includes: a gloss forming unit that forms at least two regions having different gloss levels on a print medium; and a print image forming unit that forms a print image on the at least two regions having different gloss levels of the print medium after the gloss forming unit forms the at least two regions.
    Type: Application
    Filed: January 30, 2023
    Publication date: August 17, 2023
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Tadashi TAKAKUSA, Shoji NARAMOTO
  • Patent number: 11711479
    Abstract: A printing system includes: a first printing unit that performs printing on a medium on the basis of first printing data; a first inventing unit that is located downstream from the first printing unit in a transportation direction specific to the medium and performs an inverting operation that is an operation of inverting front and back sides of the medium; a second printing unit that is located downstream from the first inverting unit in the transportation direction and performs printing on the medium on the basis of second printing data; and a control unit that determines whether the first inverting unit needs to perform the inverting operation, on the basis of whether the second printing data indicates a printing page for the front or back side of the medium.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: July 25, 2023
    Assignee: RISO KAGAKU CORPORATION
    Inventor: Hideaki Ogawa
  • Patent number: 11656818
    Abstract: An information processing apparatus including a controller configured to receive selection of a medium feeder corresponding to a page number from among a plurality of medium feeders that feed a medium; and to regard a page range of the page numbers that have been received as a cycle pattern and to repeatedly apply the cycle pattern to page numbers beyond the page range, to set, as the medium feeders corresponding the page numbers beyond the page range, the medium feeders corresponding to the page numbers in the cycle pattern.
    Type: Grant
    Filed: December 1, 2021
    Date of Patent: May 23, 2023
    Assignee: RISO KAGAKU CORPORATION
    Inventor: Yasuhiro Esaki