Patents by Inventor Masami Maruko

Masami Maruko 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).

  • Drive power transmission device, image forming apparatus and process cartridge
    Publication number: 20010008590
    Abstract: A transmission mechanism for transmitting rotation of a driving source in a main body to an object mounted on the main body for receiving the rotation, the transmission mechanism comprising a plurality of couplings provided at different positions along an axial direction of a rotating axis; wherein each of the couplings comprises, a male coupling member having a plurality of convex elements provided at an identical internal on an outer circumferential surface of the rotating axis; and a female coupling member having a plurality of concave elements for engaging with the convex elements.
    Type: Application
    Filed: January 12, 2001
    Publication date: July 19, 2001
    Inventors: Kazunori Katada, Masami Maruko, Naoto Tokutake, Takehito Hiraga, Satoshi Hamaya, Susumu Tashiro
  • Color image forming apparatus
    Patent number: 5319428
    Abstract: In a color image forming apparatus provided with a fixing roller and a pressure roller equipped with a heater therein, which is in press contact with the fixing roller. The completion timing of warm-up of the fixing device is determined by the time at which either the detected temperature of the fixing roller or the heating time of the heater reaches a predetermined value.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: June 7, 1994
    Assignee: Konica Corporation
    Inventors: Masami Maruko, Naoki Tajima