Patents Assigned to Riso Kagaku Corporation
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • Patent number: 10029490
    Abstract: Paper has a detection pattern having a length in a main scanning direction, the length becoming shorter from upstream to downstream along a paper feeding direction. An image sensor detects the detection pattern and outputs a detection signal including data in the main scanning direction (length y). A control unit calculates a position of a vertex of the detection pattern, by using the detection signal, a feeding speed, an angle being half of the vertex angle of the pattern, and an imaging time, so as to correct an image forming position on the back side to coincide with an image on the front side. The detection signal from the sensor with a low operation speed is processed according to a method utilizing a shape feature and the like of the detection pattern, thereby precisely detecting the position of the paper in the feeding direction.
    Type: Grant
    Filed: October 21, 2015
    Date of Patent: July 24, 2018
    Assignee: RISO KAGAKU CORPORATION
    Inventor: Jiro Momen
  • Patent number: 10029498
    Abstract: A printing apparatus includes: a first component; a second component; a first housing configured to house the first component; a second housing configured to house the second component and movably supported on an installation surface on which the printing apparatus is installed; and a connector configured to connect the second housing openably and closably to the first housing in a horizontal direction and to allow a tilt of a turning axis of the second housing to the first housing and an upward and downward movement of the second housing to the first housing upon opening and closing of the second housing.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: July 24, 2018
    Assignee: RISO KAGAKU CORPORATION
    Inventor: Kazuyuki Aoki
  • Patent number: 10017654
    Abstract: Disclosed is an aqueous inkjet ink for a humidity-conditioning base material, the ink comprising water, a water-dispersible resin, a colorant, and at least one surfactant selected from among acetylene glycol-based surfactants and silicone-based surfactants.
    Type: Grant
    Filed: April 7, 2016
    Date of Patent: July 10, 2018
    Assignee: RISO KAGAKU CORPORATION
    Inventors: Sayako Arai, Hirotaka Yamamoto, Ami Terakado, Shinji Tabuchi, Yoshihisa Morita
  • Publication number: 20180181350
    Abstract: A printer includes: an image former configured to form an image on a sheet based on a print job; a processor; and a memory including instructions that, when executed by the processor, cause the processor to perform operations. The operations include: comparing first time information indicating time information set for a region where the printer is allowed to be present and second time information indicating time information in a region where the printer is currently present and determining whether a time difference between the first time information and the second time information is greater than a predetermined time, and upon determining that the time difference is greater than the predetermined time, calling for execution of maintenance of the printer and selectably displaying options of the execution of the maintenance of the printer and execution of limited print processing by the image former.
    Type: Application
    Filed: December 27, 2017
    Publication date: June 28, 2018
    Applicant: RISO KAGAKU CORPORATION
    Inventors: Takahiro FUSHIMI, Takaomi UEDA
  • Patent number: 10007471
    Abstract: A controller is configured to: acquire device configuration data indicating a configuration of the printer and expendable supply data indicating a characteristic of the expendable supply; drive the communication interface to send the device configuration data and the expendable supply data to the server; drive the communication interface to receive, from the server, pattern image data and calculation program data selected by the server based on the sent device configuration data and the sent expendable supply data, the pattern image data indicating a pattern image, the calculation program data being for use to analyze the pattern image; and analyze scanned image data using the calculation program data and calculate an image adjustment value for adjusting the printer, the scanned image data being acquired by scanning the pattern image printed by the printer.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: June 26, 2018
    Assignee: RISO KAGAKU CORPORATION
    Inventor: Atsushi Takata
  • Publication number: 20180173475
    Abstract: A printing machine includes a storing unit, a determination section, and an execution section. The storing unit stores MAC addresses of information processing machines when the power is turned off. The determination section collects MAC addresses of information processing machines through a network when the printing machine is turned on. The determination section determines which of an initial configuration support process and a registration support process is to be executed on the basis of the number of changes in a comparison of the MAC address collected and the MAC address stored in the storing unit, the initial configuration support process supporting an execution of an initial configuration of the printing machine, the registration support process supporting an execution of a registration process of the terminal. The execution section executes a process determined by the determination section.
    Type: Application
    Filed: December 15, 2017
    Publication date: June 21, 2018
    Applicant: RISO KAGAKU CORPORATION
    Inventor: Atsushi TAKATA