Patents by Inventor Atsushi Chikama

Atsushi Chikama 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: 5023667
    Abstract: A printer for electrophotographically forming an image on a continuous-form recording paper. The printer has a transfer unit and a pair of heat fixing rollers which are brought into a withdrawn state, in a print stand-by state. Thus, the recording paper is out of contact with a photoconductive drum and a heat roll when the transfer unit and heat fixing rollers are in their withdrawn state. A pair of dust removing brushs are also brought into a withdrawn state in the print stand-by state so as to be out of contact with the recording paper.
    Type: Grant
    Filed: June 28, 1989
    Date of Patent: June 11, 1991
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Ikuo Negoro, Masatoshi Takano, Atsushi Chikama, Kiyoshi Negishi
  • Patent number: 4987448
    Abstract: A skewing detection mechanism for a printer of type wherein an image is formed onto a continuous recording form. A pivotally movable sensor is arranged in abutted and biased relation to the continuous recording form being transported along a predetermined transport path. A detector is provided for detecting pivotal movement of the sensor.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: January 22, 1991
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventor: Atsushi Chikama
  • Patent number: 4967691
    Abstract: A developing apparatus is provided for use in an electrophotographic apparatus. The developing apparatus includes a developer case in which a developer having a mixture of a toner and a carrier is stored, a developing roll which is located in the developer case and which is partially exposed to the outside of the developer case adjacent to a photosensitive drum, a front stirring roll which is located below the developing roll in the developer case to make a flow of developer in the developer case and below the developing roll, a rear stirring roll which is located rearwardly of the front stirring roll in the developer case to create a flow of developer in a direction opposite to the direction of flow of the developer produced by the front stirring roll, and a guide plate located between the front and rear stirring rolls for guiding most of the developer which falls form the developing roll towards the front stirring roll.
    Type: Grant
    Filed: July 14, 1988
    Date of Patent: November 6, 1990
    Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
    Inventors: Atsushi Chikama, Toshihiro Isshiki, Masahiro Kita