Patents by Inventor Tomoyuki Noguchi

Tomoyuki Noguchi 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: 6285849
    Abstract: A registering pattern having a predetermined configuration for each color is formed on a transfer material, and color misregistering is detected and corrected by laser beams and a photosensor.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: September 4, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masaya Shimada, Naomi Uchida, Yuhzoh Kawano, Tadayuki Kajiwara, Tomoyuki Noguchi, Kazuhiko Soeda, Akira Sadamoto
  • Publication number: 20010018002
    Abstract: The fixing device includes a heating roller made of magnetic metal and heated by electromagnetic induction; a fixing roller disposed parallel to the heating roller; an endless toner heating medium belt bridged across the heating roller and the fixing roller, and a press roller pressed to the fixing roller via the toner heating medium. The press roller rotates in the same direction as the toner heating medium belt to form a fixing nip region, and the belt is heated by the heating roller and rotated by the two rollers. The construction of the present invention achieves stable temperature control of the toner heating medium, and provides a stable fixing quality of the toner image.
    Type: Application
    Filed: December 21, 2000
    Publication date: August 30, 2001
    Inventors: Masahiro Samei, Kazunori Matsuo, Tomoyuki Noguchi, Yukinori Hara
  • Patent number: 6185386
    Abstract: An image forming apparatus forms test patches with no lowering of image density and no unevenness of image density. The image forming device includes a unit for generating image data for at least one test patch, an image bearing medium on which a latent image of the test patch is formed being based upon the image data generated by the test patch generating unit, developing unit for supplying toner by means of a developing roller onto the latent image so as to manifest the latent image in order to obtain a toner image, a density sensor for detecting a toner density of a toner image in the manifested test patch, and a compensator for compensating the density, being based upon a value of an output from the density sensor. With this arrangement, the test patch generating unit is adapted to create the test patches after the toner on the developing roller is consumed by a quantity corresponding to one turn of the developing roller.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: February 6, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Tomoyuki Noguchi
  • Patent number: 5790142
    Abstract: By increasing/deceasing electric energy per unit time supplied to heat energy generation means arranged in a liquid chamber having a nozzle, the amount of the ink emitted from the nozzle can be changed to correct a difference in dot diameter which occurs nozzle by nozzle and a change in dot diameter with time and to permit gradational printing.
    Type: Grant
    Filed: September 15, 1995
    Date of Patent: August 4, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shunichi Uchinami, Masaharu Oyama, Shinsuke Sato, Akihiro Yamashita, Hirokazu Ikeda, Tomoyuki Noguchi
  • Patent number: 5657062
    Abstract: An ink discharging device includes arrayed nozzle holes and corresponding ink flow paths leading thereto. An electrode is provided between the adjacent ink flow paths in such a manner as to be exposed to both of the adjacent ink flow paths so that each electrode works as a common electrode for both of the adjacent ink flow paths. By energizing a conductive ink between the electrodes within the corresponding ink flow path, a portion of the conductive ink is discharged through the corresponding nozzle hole.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: August 12, 1997
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tadashi Shiraishi, Mitsuhide Matsuda, Tomoyuki Noguchi, Masaharu Oyama
  • Patent number: 5255021
    Abstract: In an ink-jet printer of the type wherein a current is passed through a conductive ink contained between a pair of electrodes to cause the ink to become vaporized and cause trapped gasses or bubbles to expand suddenly, exerting a sufficient pressure upon the ink to force droplets of ink from a nozzle, a current value flowing between the electrodes is detected to determine the amount of wear of the electrodes, and when the detected current value is lower than a predetermined value, an alarm indicative of the replacement of the currently used ink-jet head is given and, at the same time, ejection of the ink from the nozzle is stopped. Thus, printing operation is always achieved with stable ejection of ink, guaranteeing high printing qualities.
    Type: Grant
    Filed: April 1, 1992
    Date of Patent: October 19, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tomoyuki Noguchi, Mitsuhide Matsuda, Tadashi Shiraishi, Hideaki Horio