Patents by Inventor Taiki Hasebe

Taiki Hasebe 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).

  • Power source device, power source control method, and image forming apparatus
    Patent number: 10816919
    Abstract: According to an embodiment, a power source device includes a direct current power source, an alternating current power source, a bypass capacitor, and a power source control unit. The direct current power source outputs a direct current voltage. The alternating current power source outputs a superimposed voltage having an alternating current voltage superimposed on the direct current voltage. The bypass capacitor partially accumulates a charge of alternating current for prevention of flow of current into the direct current power source from the alternating current power source. The power source control unit switches control of the direct current voltage from constant current control to constant voltage control and causes a charge of the alternating current to be accumulated in the bypass capacitor in a short time period between a transfer period and a non-transfer period both related to image formation.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: October 27, 2020
    Assignee: Ricoh Company, Ltd.
    Inventor: Taiki Hasebe
  • POWER SOURCE DEVICE, POWER SOURCE CONTROL METHOD, AND IMAGE FORMING APPARATUS
    Publication number: 20190286019
    Abstract: According to an embodiment, a power source device includes a direct current power source, an alternating current power source, a bypass capacitor, and a power source control unit. The direct current power source outputs a direct current voltage. The alternating current power source outputs a superimposed voltage having an alternating current voltage superimposed on the direct current voltage. The bypass capacitor partially accumulates a charge of alternating current for prevention of flow of current into the direct current power source from the alternating current power source. The power source control unit switches control of the direct current voltage from constant current control to constant voltage control and causes a charge of the alternating current to be accumulated in the bypass capacitor in a short time period between a transfer period and a non-transfer period both related to image formation.
    Type: Application
    Filed: February 11, 2019
    Publication date: September 19, 2019
    Applicant: Ricoh Company, Ltd.
    Inventor: Taiki Hasebe