Invention Grant
US07797867B2 Apparatus and method for retaining and selectively tensioning a sheet material display to a billboard 失效
用于保持和选择性地将片材展示张紧到广告牌的装置和方法

  • Patent Title: Apparatus and method for retaining and selectively tensioning a sheet material display to a billboard
  • Patent Title (中): 用于保持和选择性地将片材展示张紧到广告牌的装置和方法
  • Application No.: US12321272
    Application Date: 2009-01-20
  • Publication No.: US07797867B2
    Publication Date: 2010-09-21
  • Inventor: Michael Wayne Pulliam
  • Applicant: Michael Wayne Pulliam
  • Agency: Jones Walker
  • Main IPC: G09F15/00
  • IPC: G09F15/00 G09F17/00
Apparatus and method for retaining and selectively tensioning a sheet material display to a billboard
Abstract:
An apparatus for retaining and selectively tensioning a sheet material display on a billboard which includes a base plate, a handle connected to the base plate, a draw bar operationally associated with the handle, a spring detachably connected to the draw bar, and a chain with one end connected to the spring and the other end capable of being detachably connected to the sheet material display. The draw bar is selectively positioned about the handle in at least two different positions to exert a different amount of tension to the sheet material display when the handle is place in a sheet material display tensioned position.
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