Patents by Inventor Takashi Kawahashi

Takashi Kawahashi 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).

  • Patent number: 6617573
    Abstract: To devise a carrier device in which no air can accumulate between the flexible board and the carrier surface when the flexible board is held securely by vacuum suction by the carrier surface, the carrier surface of the carrier device on which the flexible board is placed is provided with an opening for supplying a vacuum and with several grooves which extend radially from the opening, the grooves being connected to one another only at the opening.
    Type: Grant
    Filed: October 25, 2001
    Date of Patent: September 9, 2003
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventor: Takashi Kawahashi
  • Publication number: 20030080287
    Abstract: To devise a carrier device in which no air can accumulate between the flexible board and the carrier surface when the flexible board is held securely by vacuum suction by the carrier surface, the carrier surface of the carrier device on which the flexible board is placed is provided with an opening for supplying a vacuum and with several grooves which extend radially from the opening, the grooves being connected to one another only at the opening.
    Type: Application
    Filed: October 25, 2001
    Publication date: May 1, 2003
    Inventor: Takashi Kawahashi
  • Patent number: 6003828
    Abstract: To prevent tilting or bending of a large mask frame holder and at the same time to prevent distortion when the mask holding frame is attached to a support base by ball plungers in three of the four corner areas of a mask holding frame that engage V groove bodies which face the ball plungers on the surface of the base, compression springs are provided in those three corners which pre-stress the mask holding frame toward the support base while a compression spring is provided between the remaining corner area of the mask holding frame and the base which acts in a direction pressing the mask holding frame away from the support base, thereby preventing the mask holding frame from bending or tilting. As an alternative, in each of the three pre-stressed corner areas of the mask holding frame, instead of a compression spring, an elastic attachment component in the form of a bracket with spring-like legs mounted to the supporting component can be provided.
    Type: Grant
    Filed: May 28, 1998
    Date of Patent: December 21, 1999
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Takashi Kawahashi, Hiromi Kai