Patents by Inventor Shuzo Iwanaga

Shuzo Iwanaga 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).

  • Liquid storing container having improved internal structure, liquid ejection head cartridge using the same container, and liquid ejection recording apparatus
    Patent number: 6382786
    Abstract: A liquid storing container attachable and detachable to and from a recording device includes a negative pressure producing member storage chamber which has a bottom wall and opposed side walls and which accommodates a negative pressure producing member and is equipped with a liquid supplying section in the bottom wall and an atmosphere communication section. A partition wall separates the negative pressure producing member storage chamber from a liquid storage chamber and defines a communicating hole for establishing communication therebetween. A path in the vicinity of the communicating hole on the negative pressure producing member storage chamber side introduces the atmosphere from the negative pressure producing member storage chamber into the liquid storage chamber. The negative pressure producing member is made with a fiber material having directionality and the communication hole is offset from the bottom wall.
    Type: Grant
    Filed: March 28, 2000
    Date of Patent: May 7, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shuzo Iwanaga, Eiichiro Shimizu, Kenta Udagawa
  • Liquid storing container having improved internal structure, liquid ejection head cartridge using the same container, and liquid ejection recording apparatus
    Publication number: 20020012033
    Abstract: A liquid storing container attachable and detachable to and from a recording device includes a negative pressure producing member storage chamber made to accommodate a negative pressure producing member and equipped with a liquid supplying section and an atmosphere communication section, a liquid storage chamber having a communicating hole for establishing communication with the negative pressure producing member storage chamber and made to define a substantially hermetic space for storing a liquid to be supplied to the negative pressure producing member, a partition wall for establishing a partition between the negative pressure producing member storage chamber and the liquid storage chamber and for defining the communicating hole, and a path made in the vicinity of the communicating hole on the negative pressure producing member storage chamber side for introducing the atmosphere from the negative pressure producing member storage chamber into the liquid storage chamber, wherein the negative pressure produc
    Type: Application
    Filed: March 28, 2000
    Publication date: January 31, 2002
    Inventors: Shuzo Iwanaga, Eiichiro Shimizu, Kenta Udagawa
  • Ink cartridge with printing head for printer
    Patent number: D451541
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: December 4, 2001
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiaki Hirosawa, Kenta Udagawa, Kyota Miyazaki, Shuzo Iwanaga