Patents Assigned to Dowa Seishi Co., Ltd.
  • Pleat screen
    Patent number: 4544011
    Abstract: A pleat screen includes a screen sheet having a plurality of zig-zag pleats and vertically foldable and unfoldable by an operator cord. At least one tape extends vertically through the pleats. Holders are mounted on the tape in engagement with selected ones of the pleats for supporting, from below, the selected pleats to prevent the pleats from being lowered due to their own weight when the screen sheet is vertically unfolded.
    Type: Grant
    Filed: July 1, 1983
    Date of Patent: October 1, 1985
    Assignee: Dowa Seishi Co., Ltd.
    Inventor: Mamoru Sawamura