Patents by Inventor Masatoshi Nakaya

Masatoshi Nakaya 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).

  • Hot runner sprue
    Patent number: 7396227
    Abstract: When a molding machine nozzle is separated from a nozzle touch surface of a hot runner sprue, application of external pressure on resin in a resin supply passage is stopped. At this time, back pressure of resin in the resin supply passage that is received by a seal exceeds atmospheric pressure, and thus the seal is moved to seal an opening of the resin supply passage from the inside of the resin supply passage. As a result, leakage of resin from the hot runner sprue is inhibited, and mixing of air in the resin in a runner is also inhibited.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: July 8, 2008
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masatoshi Nakaya, Shozo Tabata
  • Hot runner sprue
    Publication number: 20060204610
    Abstract: When a molding machine nozzle is separated from a nozzle touch surface of a hot runner sprue, application of external pressure on resin in a resin supply passage is stopped. At this time, back pressure of resin in the resin supply passage that is received by a seal exceeds atmospheric pressure, and thus the seal is moved to seal an opening of the resin supply passage from the inside of the resin supply passage. As a result, leakage of resin from the hot runner sprue is inhibited, and mixing of air in the resin in a runner is also inhibited.
    Type: Application
    Filed: February 16, 2006
    Publication date: September 14, 2006
    Inventors: Masatoshi Nakaya, Shozo Tabata