Patents by Inventor Keisuke Matsuo

Keisuke Matsuo 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: 6450616
    Abstract: A substrate for an ink-jet element of an ink-jet printing head which ejects ink through ejection openings includes heating elements provided for each of the ejection openings and which generate thermal energy for ejecting the ink, a data holding circuit for holding an image data for driving the heat generating elements, by holding the image data in the number of bits corresponding to the number of ejection openings, and a driving circuit for driving the heating elements in units of the plural heating elements provided for each of the plural ejection openings based on the image data. A selection circuit selects at least one of the plural of heating elements provided corresponding to each of the ejection openings for driving. An ink-jet printing head and ink-jet printing apparatus employ such a substrate.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: September 17, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiko Kubota, Masami Ikeda, Masami Kasamoto, Hajime Kaneko, Tsutomu Abe, Hiroyuki Ishinaga, Jun Kawai, Keisuke Matsuo, Masaaki Okada
  • Patent number: 6334674
    Abstract: An ink absorber is housed inside a housing of an ink tank and is capable of retaining ink. The ink absorber has an outer surface equal to or corresponding to a shape of an internal surface of the housing and is made of a fiber material obtained by compressing a fiber body and thermally molding at least a surface thereof. An ink tank is comprised of the ink absorber and the housing. An ink jet cartridge is comprised of the ink tank and a print head. The ink absorber has an outer surface equal to or corresponding to a shape of an internal surface of the housing before being inserted into the housing. The ink absorber comprises a fiber material, and is formed by compressing a fiber body and thermally molding at least a surface thereof.
    Type: Grant
    Filed: July 30, 1996
    Date of Patent: January 1, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takayuki Ono, Hiroshi Sugitani, Kazuaki Masuda, Hajime Yamamoto, Eiichiro Shimizu, Torachika Osada, Masahiko Higuma, Keisuke Matsuo, Jun Hinami, Masaru Iketani
  • Patent number: 6293661
    Abstract: An ink container connectable with an ink jet head detachably mountable to an ink jet device, the ink container includes a container body; a partition wall dividing an inside of the body into a first accommodating chamber and a second accommodating chamber; wherein the first accommodating chamber contains a negative pressure producing member and is provided with an ink supply opening connected with the ink jet head to supply ink and an air vent portion for communication with the ambience, the ink supply opening being formed in a wall faced to the partition wall; wherein the partition wall is provided with a fine communicating portion which is effective to permit movement of the ink from the second accommodating chamber to the first accommodating chamber and to permit movement of the air from the first accommodating chamber to the second accommodating chamber; and wherein such a portion of the negative pressure producing member as is in a path connecting ink supply opening and the fine communicating portion is
    Type: Grant
    Filed: August 10, 1998
    Date of Patent: September 25, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsutomu Abe, Keisuke Matsuo
  • Patent number: 6234618
    Abstract: An ink absorbing body stores an ink injected into an ink tank for an ink-jet with capillary force between fiber. On a surface of said fiber before filling the ink, a surfactant is deposited within a range of 0.002 to 0.2 wt % relative to a weight of the ink or in a range of 0.01 to 0.5 wt % relative to a weight of the fiber.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: May 22, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hajime Yamamoto, Eiichiro Shimizu, Keisuke Matsuo, Teruo Arashima, Jun Hinami, Wataru Takahashi
  • Patent number: 6109734
    Abstract: An ink jet head having a buffer chamber which absorbs any back-pressure wave generated as a result of generation of back wave, thereby preventing reduction of refilling with ink. Exothermic elements provided in buffer chambers formed in a common ink chamber generate bubbles so that bubbles are always maintained in the buffer chambers so as to ensure stable recording.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: August 29, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshio Kashino, Ishigorou Takahashi, deceased, Hiroyuki Ishinaga, Eiichiro Shimizu, Keisuke Matsuo, Yoshinori Misumi
  • Patent number: 6078780
    Abstract: An image heating device is provided with a film having an electrical conductive layer, a magnetic flux generating unit. An eddy current is generated on the electrical conductive layer by the magnetic flux generated by the magnetic flux generating unit. The electrical conductive layer generates heat, and an image is heated by the heat of the film. The film is provided with an elastic layer arranged on the image side of the electrical conductive layer, and a primer layer is arranged between the electrical conductive layer and the elastic layer. It is possible to effectuate a heating fixation that can be started quickly with generating no nonuniformity in the image gloss and maintaining a high image quality.
    Type: Grant
    Filed: July 31, 1996
    Date of Patent: June 20, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsuyoshi Abe, Takeshi Setoriyama, Kazuo Kishino, Keisuke Matsuo, Hideyuki Hatakeyama
  • Patent number: 5954906
    Abstract: A pressure-sensitive transferring protective covering material comprising at least (a) first flexible substrate, (b) an adhesive layer, (c) a solid resin layer, and (d) a second flexible substrate which are stacked in the named order, wherein said first flexible substrate (a) has a peel force of 30 g/inch to 120 g/inch against said adhesive layer (b), said adhesive layer (b) contains a hindered amine series light stabilizer and has a cohesion of 500 g/inch to 1500 g/inch, said solid resin layer (c) comprises a transparent resin layer containing a ultraviolet absorber and having a glass transition temperature of 50.degree. C. or above, and said second flexible substrate (d) has a peel force of 120 g/inch to 400 g/inch against said solid resin layer (c).A method for protecting and covering a print formed on an object using said pressure-sensitive transferring protective covering material.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: September 21, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsutomu Abe, Eiichi Suzuki, Mamoru Sakaki, Hiromichi Noguchi, Keisuke Matsuo, Mifune Hirose, Kenichi Moriya
  • Patent number: 5903294
    Abstract: An ink container connectable with an ink jet head detachably mountable to an ink jet device, the ink container includes a container body; a partition wall dividing an inside of the body into a first accommodating chamber and a second accommodating chamber; wherein the first accommodating chamber contains a negative pressure producing member and is provided with an ink supply opening connected with the ink jet head to supply ink and an air vent portion for communication with the ambience, the ink supply opening being formed in a wall faced to the partition wall; wherein the partition wall is provided with a fine communicating portion which is effective to permit movement of the ink from the second accommodating chamber to the first accommodating chamber and to permit movement of the air from the first accommodating chamber to the second accommodating chamber; and wherein such a portion of the negative pressure producing member as is in a path connecting ink supply opening and the fine communicating portion is
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: May 11, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsutomu Abe, Keisuke Matsuo
  • Patent number: 5786835
    Abstract: Before ink-jet recording, an image forming surface comprising an anodic oxide layer of aluminum or an alloy thereof is dried and activated. After the recording, a treatment to remove solvent components of ink and fix a dye in the ink is applied.
    Type: Grant
    Filed: August 28, 1997
    Date of Patent: July 28, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masami Ikeda, Tsutomu Abe, Keisuke Matsuo
  • Patent number: 5737483
    Abstract: A motor speed control apparatus is provided in which the controllable frequency band of the control system can be sufficiently enhanced with a comparatively simple structure even if the frequency generator equipped into the motor is low in output frequency and the rotational accuracy can be highly improved even if the disturbance of high frequency components of load torque is applied to the motor. The frequency band of the control system can be improved by using the estimated speed signal as the speed feedback signal. A motor speed control apparatus superior in disturbance control characteristic can be realized through the feed forward compensation of an estimated load torque.
    Type: Grant
    Filed: October 25, 1995
    Date of Patent: April 7, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Toshio Inaji, Eiji Ueda, Keisuke Matsuo
  • Patent number: 5710500
    Abstract: The motor speed control apparatus according to the present invention controls the rotation speed of a motor to be constant in a state where a disturbance torque is present. The motor speed control apparatus includes a disturbance torque observer 1. The disturbance torque observer 1 estimates a disturbance torque .tau..sub.d based on a detected speed signal v detected by a speed detector 105 and a drive signal D supplied to a drive circuit 150, and cuts off high-frequency components thereof by means of filters 13 and 2 so as to output an estimated disturbance signal d. A comparator 130 outputs a speed error signal .DELTA.v, which is a difference between the detected speed signal v and a desired speed signal v.sub.r. An arithmetic unit 140 outputs a control signal c in accordance with the speed error signal .DELTA.v. A torque correction unit 3 corrects the control signal c by using the estimated disturbance signal d so as to output the drive signal D.
    Type: Grant
    Filed: April 24, 1995
    Date of Patent: January 20, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Keisuke Matsuo, Toshio Inaji
  • Patent number: 5467004
    Abstract: A motor control apparatus controls a motor speed according to a detected period of a frequency signal whose frequency is in proportion to the motor speed and drives the motor so as to keep its speed fixed according to a drive signal. The motor control apparatus includes a disturbance torque observer receptive to the drive signal and the detected period which produces a estimated disturbance signal corresponding to a conversion of a disturbance torque into an electrical signal. A comparator produces a period error signal which is a difference between the detected period and a desired period. An arithmetic unit produces the control signal in accordance with the period error signM. A torque correcting unit produces the drive signal by adding the estimated disturbance signal to the control signal.
    Type: Grant
    Filed: November 17, 1993
    Date of Patent: November 14, 1995
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Keisuke Matsuo, Toshio Inaji