Patents Assigned to Sumita Company Ltd.
  • Letterpress printing plate
    Patent number: 8899149
    Abstract: A letterpress printing plate, made of a material having flexibility, includes a plurality of raised parts to applying ink to, the raised parts including a raised part for solid shade, and a buildup part formed at a backside position of the raised part for solid shade with respect to the printing plate.
    Type: Grant
    Filed: May 27, 2008
    Date of Patent: December 2, 2014
    Assignee: Sumita Company Ltd.
    Inventor: Yuji Oka
  • Letterpress printing plate
    Publication number: 20090145316
    Abstract: A letterpress printing plate, made of a material having flexibility, includes a plurality of raised parts to applying ink to, the raised parts including a raised part for solid shade, and a buildup part formed at a backside position of the raised part for solid shade with respect to the printing plate.
    Type: Application
    Filed: May 27, 2008
    Publication date: June 11, 2009
    Applicant: Sumita Company Ltd.
    Inventor: Yuji Oka