Projection screen
First Claim
Patent Images
1. A free-standing, self-contained, mobile prejection screen comprising:
- a rigid frame,a plurality of stays having their ends attached to and supporting said frame,a continuous tailored membrane having a back surface and a front viewing surface,a second continuous membrane spaced from said back surface of said first membrane,said first membrane and said second membrane being connected to form an envelope enclosing said frame and stays and defining a single chamber, andmeans in communication with said chamber to maintain a differential pressure between the atmosphere in said chamber and the ambient atmosphere, said first membrane being drawn taut when said differential pressure is maintained to provide a viewing surface configuration determined solely by the predetermined tailoring of said membrane,said back surface of said first membrane, when drawn taut, being in contact solely with said atmosphere in said chamber.
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Abstract
A tailored membrane supported solely by a peripheral frame forms the front panel of a chamber. A source of vacuum or an air blower maintains a pressure in the chamber which differs from that of the ambient atmosphere. As a result, the tailored membrane is either drawn forward or pushed taut to provide a concave or convex viewing surface having a configuration determined solely by its tailoring.
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Citations
6 Claims
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1. A free-standing, self-contained, mobile prejection screen comprising:
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a rigid frame, a plurality of stays having their ends attached to and supporting said frame, a continuous tailored membrane having a back surface and a front viewing surface, a second continuous membrane spaced from said back surface of said first membrane, said first membrane and said second membrane being connected to form an envelope enclosing said frame and stays and defining a single chamber, and means in communication with said chamber to maintain a differential pressure between the atmosphere in said chamber and the ambient atmosphere, said first membrane being drawn taut when said differential pressure is maintained to provide a viewing surface configuration determined solely by the predetermined tailoring of said membrane, said back surface of said first membrane, when drawn taut, being in contact solely with said atmosphere in said chamber. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification