Patents by Inventor Toshihiko Ujita

Toshihiko Ujita 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: 9434174
    Abstract: A light emitting portion of an ink tank emits light after a delay time in accordance with a mounting speed of the ink tank has elapsed after connecting second electrode pads on an ink tank side and a second contact on a holder side.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: September 6, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshihiko Ujita, Satoshi Oikawa
  • Publication number: 20160089894
    Abstract: A light emitting portion of an ink tank emits light after a delay time in accordance with a mounting speed of the ink tank has elapsed after connecting second electrode pads on an ink tank side and a second contact on a holder side.
    Type: Application
    Filed: September 18, 2015
    Publication date: March 31, 2016
    Inventors: Toshihiko Ujita, Satoshi Oikawa
  • Patent number: 8820901
    Abstract: An elastic member for inkjet includes a resin composition including at least a (b)-(a)-(b) type isobutylene-based triblock copolymer including an isobutylene-based polymer block (a) and a styrene-based polymer block (b), and a styrene-based polymer.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: September 2, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Fukushima, Toshihiko Ujita, Akihiko Shimomura, Kyosuke Nagaoka
  • Patent number: 8653173
    Abstract: Provided is an elastic member for ink jet, including a styrene-based thermoplastic elastomer and a thermoplastic resin, in which the elastic member further includes at least a nonionic surfactant having an ethylene oxide adduct, and the content of the nonionic surfactant is 0.1 to 5 mass % with respect to the styrene-based thermoplastic elastomer. The elastic member has sufficient releasability and high liquid-contact properties, which suppresses clogging of ejection orifices due to precipitation when eluted in ink.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: February 18, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Fukushima, Akihiko Shimomura, Toshihiko Ujita, Kyosuke Nagaoka
  • Patent number: 8449075
    Abstract: An ink jet recording head comprises a discharge port forming member that forms a discharge port used to discharge ink and a channel forming member that forms an ink channel communicating with the discharge port, at least either one of the channel forming member and the discharge port forming member comprising a substance having fluorine atoms and a rubber member composing a part of an ink passage continuous with the channel, the rubber member being cross-linked by an organic substance.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: May 28, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiko Shimomura, Toshihiko Ujita, Takashi Fukushima
  • Publication number: 20130120509
    Abstract: An elastic member for inkjet includes a resin composition including at least a (b)-(a)-(b) type isobutylene-based triblock copolymer including an isobutylene-based polymer block (a) and a styrene-based polymer block (b), and a styrene-based polymer.
    Type: Application
    Filed: July 15, 2011
    Publication date: May 16, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takashi Fukushima, Toshihiko Ujita, Akihiko Shimomura, Kyosuke Nagaoka
  • Patent number: 8425022
    Abstract: An ink container for containing ink to be supplied to an ink jet head to which the ink container is detachably mountable, includes an ink supply port for supplying the ink to the ink jet head; a air vent for fluid communication with ambience; a claw-like projection provided on a first side of the ink container; a latching lever provided on a second side opposite from the ink container, the latching lever being resiliently supported on the ink container and having a latching claw.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: April 23, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Inoue, Soichi Hiramatsu, Toshihiko Ujita, Keiichiro Tsukuda, Akihiro Yamanaka, Yasuo Kotaki, Sadayuki Sugama
  • Patent number: 8342663
    Abstract: Provided is a resin composition which is a material for ink supply tubes and which has excellent moisture barrier performance, air barrier performance, and kink resistance. The resin composition contains a thermoplastic elastomer (A) containing a (b)-(a)-(b)-type isobutylene triblock copolymer containing polymer blocks (a) having isobutylene units and polymer blocks (b) having styrene units and also contains a lubricant (B). The content of the thermoplastic elastomer (A) in the resin composition is 70% to 95% by mass. The content of the lubricant (B) in the resin composition is 5% to 15% by mass. The content of the (b)-(a)-(b)-type isobutylene triblock copolymer in the resin composition is 50% to 95% by mass. The content of the polymer blocks (a) in the (b)-(a)-(b)-type isobutylene triblock copolymer is 80% to 90% by mass. The content of the polymer blocks (b) in the (b)-(a)-(b)-type isobutylene triblock copolymer is 10% to 20% by mass.
    Type: Grant
    Filed: July 29, 2011
    Date of Patent: January 1, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kyosuke Nagaoka, Akihiko Shimomura, Toshihiko Ujita, Takashi Fukushima
  • Patent number: 8240826
    Abstract: An ink tank capable of optically detecting ink remaining in an ink accommodation chamber with high precision is provided. A printing apparatus, a method of manufacturing the ink tank, and a method of detecting ink remaining in the ink tank are also provided. Radiated light (11) projected into an ink accommodation chamber (5A) excites an illuminant material (10) contained in ink in the ink accommodation chamber (5A) to illuminate. Based on light (12) produced by the illuminant material (10), the amount of ink remaining in the ink accommodation chamber (5A) is detected.
    Type: Grant
    Filed: February 19, 2010
    Date of Patent: August 14, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Fukushima, Toshihiko Ujita, Shinichi Miyauchi
  • Patent number: 8227063
    Abstract: The ink-contacting thermoplastic elastomer composition for an ink jet printer of the present invention contains: a styrene-isoprene-styrene block copolymer (SIS) in which at least part of isoprene blocks are formed of 3,4-polyisoprene; a styrene-ethylene/butylene-styrene block copolymer (SEBS); a polyolefin; and a polybutene.
    Type: Grant
    Filed: April 19, 2010
    Date of Patent: July 24, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kyosuke Nagaoka, Akihiko Shimomura, Toshihiko Ujita, Takashi Fukushima
  • Publication number: 20120129997
    Abstract: Provided is an elastic member for ink jet, including a styrene-based thermoplastic elastomer and a thermoplastic resin, in which the elastic member further includes at least a nonionic surfactant having an ethylene oxide adduct, and the content of the nonionic surfactant is 0.1 to 5 mass % with respect to the styrene-based thermoplastic elastomer. The elastic member has sufficient releasability and high liquid-contact properties, which suppresses clogging of ejection orifices due to precipitation when eluted in ink.
    Type: Application
    Filed: October 21, 2011
    Publication date: May 24, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Takashi Fukushima, Akihiko Shimomura, Toshihiko Ujita, Kyosuke Nagaoka
  • Publication number: 20120116018
    Abstract: Provided is a resin composition for ink jet, including at least a component (A) and a component (B), in which the component (A) includes a (b)-(a)-(b) type isobutylene-based triblock copolymer composed of an isobutylene-based polymer block (a) and a styrene-based polymer block (b), and the component (B) includes a cyclic-polyolefin-based polymer. The resin composition for ink jet has water-vapor barrier properties and gas barrier properties comparable to or more than those of crosslinked rubbers having high water-vapor barrier properties and high gas barrier properties, and can be molded by any of press-molding, injection molding, extrusion molding, and the like.
    Type: Application
    Filed: October 21, 2011
    Publication date: May 10, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kyosuke Nagaoka, Akihiko Shimomura, Toshihiko Ujita, Takashi Fukushima, Takushi Matsushita, Hiroyuki Takenaka
  • Patent number: 8123342
    Abstract: Multiple grooves are formed along an inclination face of a prism-like part. A pitch of the grooves is smaller than the wavelength of light, specifically infrared light, used as a light source for detecting an ink amount. When sufficient amount of contained ink is consumed to expose the prism-like part, ink on the inclination face is held in the grooves due to their capillary force. At this time, if an amount of the ink exceeds the capacities of the grooves, no capillary force acts on the excessive ink. Accordingly, the excessive ink becomes an ink pool and slides down to an ink surface. Since the face provided with the grooves at the pitch smaller than the wavelength of the detection light source serves as a plane face optically, detection with high reliability is made possible.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: February 28, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshihiko Ujita, Takashi Fukushima, Akihiko Shimomura
  • Publication number: 20120033021
    Abstract: Provided is a resin composition which is a material for ink supply tubes and which has excellent moisture barrier performance, air barrier performance, and kink resistance. The resin composition contains a thermoplastic elastomer (A) containing a (b)-(a)-(b)-type isobutylene triblock copolymer containing polymer blocks (a) having isobutylene units and polymer blocks (b) having styrene units and also contains a lubricant (B). The content of the thermoplastic elastomer (A) in the resin composition is 70% to 95% by mass. The content of the lubricant (B) in the resin composition is 5% to 15% by mass. The content of the (b)-(a)-(b)-type isobutylene triblock copolymer in the resin composition is 50% to 95% by mass. The content of the polymer blocks (a) in the (b)-(a)-(b)-type isobutylene triblock copolymer is 80% to 90% by mass. The content of the polymer blocks (b) in the (b)-(a)-(b)-type isobutylene triblock copolymer is 10% to 20% by mass.
    Type: Application
    Filed: July 29, 2011
    Publication date: February 9, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Kyosuke Nagaoka, Akihiko Shimomura, Toshihiko Ujita, Takashi Fukushima
  • Patent number: 8109620
    Abstract: A reliable ink cartridge that reduce printing nonconformity even during high speed inkjet-recording with multiple nozzles by alleviating rapid external impact applied from the outside of the ink cartridge. Within a casing of an ink cartridge, a flexible bag forming an ink reservoir is accommodated. Between the surface of the flexible bag where a sheet member is bonded and a wall surface of the casing, a stress damping chamber is provided. The stress damping chamber communicates with the atmosphere outside the ink cartridge via an orifice formed on a wall surface of the casing.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: February 7, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshinori Kojima, Toshihiko Ujita
  • Publication number: 20110267403
    Abstract: An ink jet recording head comprises a discharge port forming member that forms a discharge port used to discharge ink and a channel forming member that forms an ink channel communicating with the discharge port, at least either one of the channel forming member and the discharge port forming member comprising a substance having fluorine atoms and a rubber member composing a part of an ink passage continuous with the channel, the rubber member being cross-linked by an organic substance.
    Type: Application
    Filed: July 14, 2011
    Publication date: November 3, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Akihiko Shimomura, Toshihiko Ujita, Takashi Fukushima
  • Patent number: 8038274
    Abstract: There is disclosed an ink tank capable of inhibiting penetration of a gas even in an ink storage section made of a resin, having such a flexibility as to easily apply a negative pressure to ink, having an excellent resource protective property and applicable even to a small and inexpensive ink jet recording device having a large degree of freedom in design. In the ink tank for the ink jet recording device having the ink storage section made of a plastic, the ink storage section has a coating layer including a liquid retaining member capable of retaining ink on an inner surface or an outer surface thereof. The liquid retaining member can include a foam material, a fiber material or a gel-like substance. In the ink storage section, the liquid retaining member included in the coating layer including the liquid retaining member capable of retaining the ink on the outer surface thereof includes a moisture adsorbent which adsorbs a moisture.
    Type: Grant
    Filed: May 9, 2007
    Date of Patent: October 18, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshihiko Ujita, Hajime Yamamoto
  • Patent number: 8007094
    Abstract: The present invention provides an ink jet cartridge configured such that an absorber is housed in one space while ink is accommodated in the other space, the ink jet cartridge keeping the ink sealed during distribution. The ink jet cartridge has an ink tank portion that accommodates ink, a print head portion that ejects the accommodated ink, and an ink supply path connected between the ink tank portion and the print head portion. A seal member that seals the ink supply path is located on an ink tank portion side of the ink supply path.
    Type: Grant
    Filed: June 10, 2008
    Date of Patent: August 30, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Toshihiko Ujita
  • Patent number: 8007069
    Abstract: An ink jet recording head comprises a discharge port forming member that forms a discharge port used to discharge ink and a channel forming member that forms an ink channel communicating with the discharge port, at least either one of the channel forming member and the discharge port forming member comprising a substance having fluorine atoms and a rubber member composing a part of an ink passage continuous with the channel, the rubber member being cross-linked by an organic substance.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: August 30, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiko Shimomura, Toshihiko Ujita, Takashi Fukushima
  • Patent number: 7980678
    Abstract: An ink jet recording head includes a substrate including a discharge port forming member provided with discharge ports for discharging ink, and a flow path forming member for forming an ink flow path communicating with the discharge ports, wherein at least one of the flow path forming member and the discharge port forming member contains a material having fluorine atoms, a supply path used to supply ink to a supply hole, a support member supporting the substrate, a supply path forming member for forming a part of the supply path, and a rubber member provided between the support member and the supply path forming member and forming a part of the supply path. The supply path forming member or the rubber member contains a material containing bivalent metal, and the rubber member contains a compound providing counter ions to the bivalent metal.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: July 19, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Fukushima, Toshihiko Ujita, Akihiko Shimomura