Patents by Inventor Masaaki Kumasaka

Masaaki Kumasaka 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: 6789966
    Abstract: In a printer, in which printing is performed on a recording medium which is transported in a first direction, a carriage is reciprocately moved in a second direction which is perpendicular to the first direction. A print head is mounted on the carriage, and provided with a head face. A frame is placed in a first side of the print head. A guide plate extends in the second direction. The guide plate includes a first portion provided as a part of the frame so as to extend in a third direction which is orthogonal to both of the first direction and the second direction, a second portion continued from the first portion so as to extend in the first direction. The second portion supports the carriage so as to define a distance between the head face and the recording medium. The guide plate further includes a third portion continued from the second portion so as to extend in a fourth direction opposite to the third direction.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: September 14, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Kazuo Tanaka, Kazuhiro Hashii, Hiromu Iida, Atsuhiko Takeuchi, Masaaki Kumasaka, Akira Sugino
  • Publication number: 20020146266
    Abstract: In a printer, in which printing is performed on a recording medium which is transported in a first direction, a carriage is reciprocately moved in a second direction which is perpendicular to the first direction. A print head is mounted on the carriage, and provided with a head face. A frame is placed in a first side of the print head. A guide plate extends in the second direction. The guide plate includes a first portion provided as a part of the frame so as to extend in a third direction which is orthogonal to both of the first direction and the second direction, a second portion continued from the first portion so as to extend in the first direction. The second portion supports the carriage so as to define a distance between the head face and the recording medium. The guide plate further includes a third portion continued from the second portion so as to extend in a fourth direction opposite to the third direction.
    Type: Application
    Filed: February 28, 2002
    Publication date: October 10, 2002
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Kazuo Tanaka, Kazuhiro Hashii, Hiromu Iida, Atushiko Takeuchi, Masaaki Kumasaka, Akira Sugino
  • Patent number: 6179597
    Abstract: An automatic lubricator for an injection molding machine, capable of performing proper lubrication in accordance with operation environment of the injection molding machine. A lubrication interval Ls is controlled according to length of cycle time S of the injection molding machine so that the lubrication interval Ls is increased when the cycle time S is long and it is decreased when the cycle time S is short. Further, when a ball screw temperature t1 is high the lubrication interval Ls is accordingly decreased by &Dgr;DL, and when the ball screw temperature t1 is low the lubrication interval Ls is accordingly increased by &Dgr;DL. Also, when the ambient temperature t2 is high the operation time Tp of a lubricating pump 2 is decreased, and when the ambient temperature t2 is low the operation time Tp is increased to stabilize the lubrication quantity.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: January 30, 2001
    Assignee: Fanuc Ltd.
    Inventors: Susumu Ito, Koichi Nishimura, Masaaki Kumasaka