Patents Assigned to Riso Kagaku Corporation
  • INKJET PRINTER WITH INK RECEPTOR FOR RECEIVING INK AS WASTE LIQUID
    Publication number: 20180281424
    Abstract: An inkjet printer includes: at least one ink receptor having a tray shape with a bottom plate and an opening facing upward and being horizontally movable; and a suction unit. The at least one ink receptor is configured to receive ink ejected from at least one inkjet head as waste liquid. The suction unit includes at least one suction nozzle arranged above the bottom plate within a movable range of the at least one ink receptor and is configured to suction the ink in the at least one ink receptor through the opening with the at least one suction nozzle.
    Type: Application
    Filed: March 7, 2018
    Publication date: October 4, 2018
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Yasuhiro KATADA, Akira NISHIYAMA, Shunta NAKAMURA, Naoto TSUJINO
  • INKJET PRINTER
    Publication number: 20180272738
    Abstract: An inkjet printer includes: a pressurized space and a depressurized space for circulation of ink along a circulation path; a main connection path and an adjustment path connecting the pressurized space and the depressurized space to each other; an air pump configured to send air from the depressurized space to the pressurized space though the main connection path or the adjustment path; a changeover device configured to change over between the main connection path and the adjustment path; and a controller. The controller drives the air pump with the main connection path being set to generate preset pressures respectively in the pressurized space and the depressurized space and then controls the air pump with the adjustment path being changed over to maintain pressures in the pressurized space and the depressurized space respectively at the preset pressures.
    Type: Application
    Filed: September 6, 2016
    Publication date: September 27, 2018
    Applicant: RISO KAGAKU CORPORATION
    Inventor: Hiroshi SUGITANI
  • Image forming apparatus with multiple print engines for distributed processing of single print job
    Patent number: 10082986
    Abstract: Upon satisfaction of a predetermined trigger condition with a first hard disk drive mounted in a first controller, a first processor executes a first common file stored in a first common file storage region and write and store a first configuration file into a first configuration file storage region. The first processor executes the first common file and the first configuration file of a first firmware program and drives a first print engine to execute a first job segment stored in a first job segment storage region.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: September 25, 2018
    Assignee: RISO KAGAKU CORPORATION
    Inventor: Yongning Wang
  • IMAGE FORMATION SYSTEM
    Publication number: 20180270370
    Abstract: An image formation system includes: an encoded image generation device including a first processor that generates print data from manuscript data, sets security information for controlling a print mode of the print data, and generates an encoded image from the print data and the security information; and an image formation device including a second processor that inputs the encoded image, decodes the print data and the security data from the input encoded image, determines whether an output of the decoded print data is available in accordance with the decoded security information, and outputs the decoded print data when it is determined that the output of the print data is available.
    Type: Application
    Filed: January 25, 2018
    Publication date: September 20, 2018
    Applicant: RISO KAGAKU CORPORATION
    Inventor: Junichi HAKAMADA
  • Printing apparatus with access portions for access to inside of housing
    Patent number: 10071579
    Abstract: A printing apparatus includes a plurality of components for the printing apparatus, and a housing configured to house the plurality of components in an inside of the housing and having a plurality of access portions used by a user and a service man to access the inside of the housing. The access portions have predetermined difficulty levels of access of accessing the inside of the housing from the access portions respectively. At least one or more of the plurality of components housed in the inside of the housing are arranged based on positions and the predetermined difficulty levels of access of the access portions and a frequency of access to the at least one or more of the plurality of components by the user and the service man.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: September 11, 2018
    Assignee: RISO KAGAKU CORPORATION
    Inventor: Kazuyuki Aoki
  • Sealed-letter preparing device
    Patent number: 10071829
    Abstract: There are provided: a paper folding unit folding and sending a content sheet to a transfer path; an inserter unit sending an insert sheet to the transfer path; an acquiring unit acquiring information on a top/bottom direction and a surface/obverse direction of the content sheet and insert sheet; a merging unit in which the content sheet folded by the paper folding unit is overlapped with the insert sheet; and an enclosing unit enclosing the merged content sheet and insert sheet into an envelope sheet, in which, when the content sheet and insert sheet merge and are overlapped, the content sheet is folded so that the top/bottom direction and the surface/obverse direction of an image of the content sheet match those of an image of the insert sheet, based on the information acquired by the acquiring unit.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: September 11, 2018
    Assignee: RISO KAGAKU CORPORATION
    Inventor: Kouichiro Iida
  • Inkjet printing apparatus with wiper for inkjet head
    Patent number: 10065414
    Abstract: An inkjet printing apparatus includes: a print bar unit having a print bar, a maintainer, and a movement driver; and a controller. Upon maintenance of an inkjet head of the print bar, the controller is configured to drive the movement driver to move the maintainer from a deployment position to a retreat position with the print bar arranged at a maintenance position above a height position for printing while wiping a nozzle surface of the inkjet head with the wiper of the maintainer being moved. The deployment position is a position under the inkjet head in maintenance of the inkjet head and the retreat position is a position where the maintainer is retreated from the deployment position.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: September 4, 2018
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Akira Nishiyama, Shunta Nakamura
  • Aqueous inkjet ink for humidity-conditioning base material and method for producing decorated humidity-conditioning base material
    Patent number: 10066111
    Abstract: Disclosed is an aqueous inkjet ink for a humidity-conditioning base material, the ink comprising at least a colorant, a water-dispersible resin and water, and the water-dispersible resin comprising at least one water-dispersible urethane resin and at least one water-dispersible (meth)acrylic resin or water-dispersible styrene/(meth)acrylic resin.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: September 4, 2018
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Sayako Arai, Hirotaka Yamamoto, Ami Terakado, Shinji Tabuchi, Yoshihisa Morita
  • PRINTER
    Publication number: 20180244486
    Abstract: A printer includes: a housing; a paper delivery table on which paper sheets delivered from an inside of the housing are stacked; a suction fan that sucks a gas that cools down the inside of the housing from an outside of the housing; and a first suction port that is a suction port through which a gas is sucked from the outside of the housing by the suction fan and through which a gas below a paper sheet that is delivered from the inside of the housing is sucked.
    Type: Application
    Filed: January 22, 2018
    Publication date: August 30, 2018
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Tsuyoshi IWANO, Masaru OHMORI, Yasuko YAMAMOTO, Keiichi MATSUKAWA, Masahiro KATO
  • OIL-BASED INKJET INK
    Publication number: 20180244941
    Abstract: An oil-based inkjet ink can be provided which exhibits excellent discharge stability even after a long idle period, and also yields high image density and prevents show-through in printed items. The oil-based inkjet ink contains a pigment, an amide-based dispersant and a non-aqueous solvent, wherein the non-aqueous solvent contains a modified silicone oil having 2 or 3 silicon atoms in one molecule, and a petroleum-based hydrocarbon solvent.
    Type: Application
    Filed: February 26, 2018
    Publication date: August 30, 2018
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Hikaru SUGIURA, Shinichiro SHIMURA, Marie MORINAGA, Kazuyuki ANDO
  • OIL-BASED INKJET INK
    Publication number: 20180244937
    Abstract: Disclosed is an oil-based inkjet ink containing a colorant and a non-aqueous solvent, wherein the non-aqueous solvent contains at least 15% by mass but not more than 100% by mass, relative to the total mass of the non-aqueous solvent, of an organosilicon compound having 2 to 6 silicon atoms in one molecule, having an organic group in which a carbon atom is bonded directly to a silicon atom and in which the total number of carbon atoms and oxygen atoms is at least 4, and having a total number of carbon atoms and oxygen atoms, contained within all of the organic groups in which the total number of carbon atoms and oxygen atoms is at least 4, that is from 4 to 20 within one molecule.
    Type: Application
    Filed: February 26, 2018
    Publication date: August 30, 2018
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Hikaru SUGIURA, Shinsuke OZAWA, Shinichiro SHIMURA, Kazuyuki ANDO, Marie MORINAGA, Teruaki OKAWA, Noriaki SUGAWARA
  • OIL-BASED INKJET INK
    Publication number: 20180244940
    Abstract: An oil-based inkjet ink is disclosed, the oil-based inkjet ink containing a pigment, a pigment dispersant and a non-aqueous solvent, wherein the pigment contains an acidic carbon black having a pH of 2 to 6, the non-aqueous solvent contains a modified silicone oil having a surface tension of not more than 27 mN/m, and an amount of the modified silicone oil, relative to a total mass of the oil-based inkjet ink, is at least 15% by mass but not more than 80% by mass.
    Type: Application
    Filed: February 26, 2018
    Publication date: August 30, 2018
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Kazuyuki ANDO, Shinichiro SHIMURA, Marie MORINAGA, Hikaru SUGIURA
  • INKJET PRINTER WHICH STIFFENS SHEET
    Publication number: 20180244082
    Abstract: An inkjet printer includes: at least one inkjet head configured to eject ink to a sheet and print an image; at least one stiffening conveyor configured to convey the sheet toward the at least one inkjet head in a conveyance direction while stiffening the sheet by deforming the sheet into a wave shape in a width direction orthogonal to the conveyance direction; and at least one platen arranged to face the at least one inkjet head and having a protrusion, the protrusion provided on a surface of the at least one platen facing the at least one inkjet head and configured to support a convex portion in the wave shape of the deformed sheet, the at least one platen configured to support the sheet while keeping the sheet deformed in the wave shape.
    Type: Application
    Filed: February 9, 2018
    Publication date: August 30, 2018
    Applicant: RISO KAGAKU CORPORATION
    Inventor: Yoshihisa MORITA
  • OIL-BASED INKJET INK
    Publication number: 20180244936
    Abstract: An oil-based inkjet ink is disclosed, the oil-based inkjet ink containing a colorant and a non-aqueous solvent, wherein the non-aqueous solvent contains a silicone oil having a boiling point higher than 250° C. and a fatty acid ester-based solvent having 10 to 30 carbon atoms.
    Type: Application
    Filed: February 26, 2018
    Publication date: August 30, 2018
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Shinichiro Shimura, Hikaru Sugiura, Shinsuke Ozawa
  • OIL-BASED INKJET INK
    Publication number: 20180244939
    Abstract: An oil-based inkjet is disclosed, the oil-based inkjet ink containing a pigment, a pigment dispersant and a non-aqueous solvent, wherein the non-aqueous solvent contains a silicone oil having a surface tension of at least 19.0 mN/m but less than 24.0 mN/m and a polar solvent having a surface tension of at least 27.0 mN/m, and a surface tension of the ink is at least 23.0 mN/m but less than 27.0 mN/m.
    Type: Application
    Filed: February 26, 2018
    Publication date: August 30, 2018
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Hikaru Sugiura, Shinichiro Shimura, Marie Morinaga, Kazuyuki Ando
  • OIL-BASED INKJET INK
    Publication number: 20180244938
    Abstract: An oil-based inkjet ink can be provided which prevents dye conversion of a dye lake pigment contained in the ink, prevents adhesion of the ink to the nozzle plate, and yields excellent drying properties for printed items. The oil-based inkjet ink contains a dye lake pigment, a pigment dispersant and a non-aqueous solvent, wherein the non-aqueous solvent contains a silicone oil having a surface tension of at least 20 mN/m but not more than 28 mN/m. The surface tension of the silicone oil is preferably at least 22 mN/m but not more than 26 mN/m.
    Type: Application
    Filed: February 26, 2018
    Publication date: August 30, 2018
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Marie MORINAGA, Shinichiro SHIMURA, Kazuyuki ANDO, Hikaru SUGIURA
  • Colored resin particle dispersion, method for producing same, and inkjet ink
    Patent number: 10059813
    Abstract: A colored resin particle dispersion and an inkjet ink are provided which preferably exhibit excellent rub fastness and alcohol resistance, and yield printed items having high image density. Specifically, a colored resin particle dispersion includes colored resin particles, a basic dispersant and a non-aqueous solvent. The colored resin particles include a colorant, a thermoplastic solid resin and a liquid organic compound having an acidic group, and the thermoplastic solid resin has a polar parameter ?p and a hydrogen bonding parameter ?h from the Hansen solubility parameters that satisfy ?p=2.5 to 11.0 and ?h=5.0 to 12.0 respectively is provided.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: August 28, 2018
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Yoshifumi Watanabe, Manami Shimizu
  • IMAGE PROCESSING MACHINE
    Publication number: 20180225070
    Abstract: A printing machine includes a scanning unit, a storing unit, a determination section, and an editing section. The scanning unit reads a set of original images from an original composed of a plurality of pages and reads a set of editing images from an original-for-editing for editing the original. The storing unit stores the read set of original images and the read set of editing images in units of pages. When an editing mode is set, the determination section determines whether or not there are original images that correspond to a first editing image which is a first page and a last editing image which is a last page of the original-for-editing stored in the storing unit, among the set of original images stored in the storing unit. The editing section edits the set of original images using the set of editing images based on a result of the determination.
    Type: Application
    Filed: January 30, 2018
    Publication date: August 9, 2018
    Applicant: RISO KAGAKU CORPORATION
    Inventor: Yoshifumi SUGIYAMA
  • Colored resin particle dispersion and inkjet ink
    Patent number: 10040958
    Abstract: A colored resin particle dispersion and an ink are provided which yield excellent abrasion resistance for printed items. Moreover, a colored resin particle dispersion and an inkjet ink are provided which exhibit excellent abrasion resistance, water resistance and marker resistance, as well as favorable storage stability. Specifically provided are a colored resin particle dispersion containing colored resin particles, a basic dispersant, and a non-aqueous solvent, wherein the colored resin particles include a colorant and a crosslinked solid resin, and an inkjet ink containing this colored resin particle dispersion.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: August 7, 2018
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Kazuyuki Ando, Yoshifumi Watanabe, Manami Shimizu
  • IMAGE READING DEVICE
    Publication number: 20180220027
    Abstract: An image reading device includes: a platen on which a document is placed; a platen cover openable and closable with respect to the platen; a cover-open sensor which detects a fact that the open/close angle of the platen cover has passed a predetermined angle from a close state; a CCD line sensor including charge coupled devices (CCD) arranged for recording a variation in distribution for a fixed period of time of incident light when detecting passing of the platen cover; a variation amount calculator which calculates a variation amount of incident light at each distribution point on the basis of a variation in distribution recorded by the CCD line sensor; and a variation amount determination unit which determines whether or not a variation amount calculated by the variation amount calculator exceeds a predetermined threshold.
    Type: Application
    Filed: July 8, 2016
    Publication date: August 2, 2018
    Applicant: RISO KAGAKU CORPORATION
    Inventor: Masahiko KUSUHATA