Patents Assigned to Riso Kagaku Corporation
  • 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
  • Publication number: 20230125577
    Abstract: A printing apparatus includes: a printing section; a print conveyor conveying a medium in the printing section; a constant-speed conveyor conveying the medium at a variable constant conveying speed in a circulation route for duplex printing; a registration roller pair against which the medium to be conveyed to the printing section is caused to abut; and a processor determining a conveyance schedule for the medium based on at least one of a first conveyance route length between a downstream end portion in a conveying direction of the print conveyor and an upstream end portion in the conveying direction of the constant-speed conveyor and a second conveyance route length between a downstream end portion in the conveying direction of the constant-speed conveyor and the registration roller pair, and a medium length in the conveying direction of the medium.
    Type: Application
    Filed: October 13, 2022
    Publication date: April 27, 2023
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Yoshihiro HANAMOTO, Hirokazu YABUNE, Masashi HARA
  • Patent number: 11629019
    Abstract: A medium feeding apparatus includes: a placement mount on which a plurality of media are placed; a transportation mechanism that transports an uppermost medium of the plurality of media placed on the placement mount; a floating-air blowout mechanism that blows out air to float at least the uppermost medium; a suction mechanism that sucks air to cause the uppermost medium floated by the floating-air blowout mechanism blowing out air to be attracted to the transportation mechanism; and a floating-air control unit that causes the floating-air blowout mechanism to start to blow out air while the uppermost medium is being attracted to the transportation mechanism after starting to be transported by the transportation mechanism, so as to float at least a second medium located below the uppermost medium, and causes the floating-air blowout mechanism to stop blowing out air before the second medium starts to be transported by the transportation mechanism.
    Type: Grant
    Filed: January 21, 2021
    Date of Patent: April 18, 2023
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Yoshihisa Morita, Yoshiyuki Okada
  • Publication number: 20230107262
    Abstract: A treatment liquid which is applied to a substrate by an inkjet system, and includes water, a coagulant, and a surfactant, in which the coagulant contains a polycondensate of an aliphatic amine and an epihalohydrin, and a diallyldialkylammonium halide-based polymer, at a mass ratio of 20:80 to 90:10, and the surfactant contains a fluorine-based surfactant and a silicone-based surfactant.
    Type: Application
    Filed: July 8, 2022
    Publication date: April 6, 2023
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Yuki URANO, Masanori ITO, Ryo SHINOTSUKA
  • Publication number: 20230096525
    Abstract: An electronic apparatus includes: a chassis formed of a conductive member and including an opening; a radiation source arranged in the chassis and radiating noise electric waves; and a conductor formed of a conductive member and arranged on a same side of the radiation source as the opening with at least a part of the conductor overlapping the opening in a plan view of the opening. The conductor has one end electrically connected to the chassis and the other end as an electrically open end.
    Type: Application
    Filed: July 6, 2022
    Publication date: March 30, 2023
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Hideaki INOUE, Seiichiro NAGATA, Takahiro ABE
  • Patent number: 11584599
    Abstract: A transportation apparatus includes a plurality of transportation members that are arranged in a transportation direction for a medium and transport the medium, a plurality of actuators that drive the plurality of transportation members, and a processor that controls the plurality of actuators in such a manner as to increase transportation velocities of the plurality of actuators in order from actuators for driving transportation members on a downstream side in the transportation direction to actuators for driving transportation members on an upstream side in the transportation direction.
    Type: Grant
    Filed: November 16, 2020
    Date of Patent: February 21, 2023
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Ryuichi Shibata, Miki Okawara
  • Patent number: 11542402
    Abstract: An oil-based inkjet ink is disclosed that contains a pigment, a dispersant formed with an acidic resin, a low-molecular weight amine compound and a basic polymer, and a non-aqueous solvent. A method for producing an oil-based inkjet ink and a method for producing a dispersant is also disclosed.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: January 3, 2023
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Naofumi Ezaki, Shinichiro Shimura, Shinsuke Ozawa, Tsukasa Hamada, Mitsuko Kitanohara, Tetsuya Shiraishi
  • Publication number: 20220410590
    Abstract: An inkjet printing apparatus includes: a first and a third head that ejects ink onto a print medium to form a printed image; a second head that coats the print medium with a treatment agent that contains a coagulant that coagulates ink; and a control unit that performs a two step ink ejection control process to control the first through third heads such that ink is ejected onto the print medium until a printing rate in a predetermined region of the print medium reaches a threshold value which is set in advance, coats the treatment agent thereafter, and then ejects ink according to a remaining printing rate after the treatment agent is coated.
    Type: Application
    Filed: June 10, 2022
    Publication date: December 29, 2022
    Applicant: RISO KAGAKU CORPORATION
    Inventor: Takahisa YAMAZAKI