Projection screen unit
AssigneeMagna Mir, Inc.
InventorsRobert Portner, Phillip Miller
Life of this patent
Estimating the term…
Abstract
A screen for a projection system supported by a pair of cross members extending to the four corners of the screen where they receive a tensioning member disposed around the perimeter of the screen and held in stress by a tensioning mechanism secured to a portion of one of the cross members. The cross members may be secured in their "up" position by means of a restraining member and the screen may be tilted forward as permitted by one of several modes of support. The screen may be shaped with curvilinear edges preferably of a catenary configuration to increase tautness which is imparted thereto by the tensioning member.
Claims12
A projection screen unit comprising:
- a pair of diagonally disposed cross rods;
- a screen member having sleeve-like receiving means extending around its perimeter;
- an inelastic member slidably securable within said receiving means;
- means for securing said inelastic member to said cross rods;
- and
- means for imparting tension to said inelastic member.
A projection screen unit comprising:
- a four sided flat screen-like component having doubled over portions around its perimeter to form sleeve-like pockets;
- a cable extendable through said sleeve-like pockets and around the perimeter of said screen-like component;
- diagonally disposed cross support rods positioned to support said screen-like component, said cable being slidably secured near each extremity of each said cross rod;
- and
- means for imparting tension to said cable whereby tautness is created in said screen-like component.
Dependencies are inferred from the claim text.