Patents by Inventor Kunimasa Kasai

Kunimasa Kasai 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).

  • Toner seal member, and process cartridge
    Patent number: 7062195
    Abstract: A toner seal member which is maintainable in contact with a rotating member to seal a toner. The toner seal member has a non-woven fabric sheet on a support layer formed of an elastic member, and the non-woven fabric sheet has a fiber diameter of from 2 ?m to 10 ?m. This toner seal member can prevent fine toner from leaking via a photosensitive drum surface and can also prevent coarse powder toner from adhering to the photosensitive drum surface, and has sufficient toner sealing properties without damaging the functions of the photosensitive drum and image-forming performance.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: June 13, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoshi Kurihara, Kunimasa Kasai, Teruhiko Sasaki, Naoki Matsumaru
  • Toner seal member, and process cartridge
    Publication number: 20040208668
    Abstract: In a toner seal member which is to be kept in contact with a rotating member to seal a toner, the toner seal member has a nonwoven-fabric sheet on a support layer formed of an elastic member, and the nonwoven-fabric sheet has a fiber diameter of from 2 &mgr;m to 10 &mgr;m. This toner seal member can prevent fine toner from leaking via a photosensitive drum surface and also prevent toner coarse powder from adhering to the photosensitive drum surface, and has sufficient toner sealing properties without damaging functions of the photosensitive drum and performances concerned with image formation.
    Type: Application
    Filed: April 14, 2004
    Publication date: October 21, 2004
    Applicant: Canon Kabushiki Kaisha
    Inventors: Satoshi Kurihara, Kunimasa Kasai, Teruhiko Sasaki, Naoki Matsumaru