Patents by Inventor Noriyasu Takeuchi

Noriyasu Takeuchi 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).

  • Ghostless developed image forming apparatus and method
    Patent number: 5937247
    Abstract: A developing apparatus develops a latent image with a liquid developer includes a developer container capable of containing the liquid developer therein, a developer carrying device that carries the developer thereon and develops a latent image thereon, a developer applying device that applies the developer to the developer carrying device and forms a thin developer layer thereon, and a developer supplying device positioned in contact with the developer applying device and supplies the developer from the developer container to the developer applying device. The developer-supplying device is separated after the developer carrying device develops a latent image, while the developer applying device removes the developer remaining on the developer carrying device.
    Type: Grant
    Filed: September 18, 1998
    Date of Patent: August 10, 1999
    Assignee: Ricoh Company Ltd.
    Inventors: Noriyasu Takeuchi, Masahiko Itaya
  • Wet process image forming apparatus and carrier vapor collecting device therefor
    Patent number: 5708938
    Abstract: A wet process image forming apparatus using a developing liquid consisting of a carrier liquid and a toner dispersed therein, in which air containing carrier vapor produced in, e.g., a fixing section, is sucked by a suction fan via a first duct into a liquefying section. The liquefying section liquefies the carrier vapor and water vapor. A separating section is disposed below the liquefying portion and includes a receptacle. A liquid produced by the liquefying section is caused to flow down into the receptacle along a chain due to its own weight. The separating section separates the liquid into the carrier liquid and water on the basis of a difference in specific gravity. Only the carrier overlying the water in the receptacle is fed to a carrier tank via overflow ports formed in the wall of the receptacle. The water is delivered to a water tank via a pipe. The pipe is so configured as to maintain the liquid level in the receptacle substantially at the level of the overflow ports.
    Type: Grant
    Filed: December 14, 1995
    Date of Patent: January 13, 1998
    Assignee: Ricoh Company, Ltd.
    Inventors: Noriyasu Takeuchi, Tsuneo Kurotori, Masakazu Muranaka, Katsuaki Miyawaki, Toshio Inada, Yusuke Takeda, Sadayuki Iwai, Kozoh Sudoh
  • Thermal head
    Patent number: 5289203
    Abstract: A thermal head comprising a plurality of heating resistor elements disposed in a row. Each of the resistor element has a rectangular window formed in a center portion of the element. A slit is formed in the resistor element along a direction perpendicular to the row traversing the window and dividing the element to two halves along the direction of the row.
    Type: Grant
    Filed: January 14, 1992
    Date of Patent: February 22, 1994
    Assignee: Ricoh Company, Ltd.
    Inventor: Noriyasu Takeuchi