Screen for exhibiting projected images

Details Screen for exhibiting projected images Screen for exhibiting projected images

1975-03-24

1976-12-21

Hix, L. T.

350295, G03B 2160, G02B 510, G03B 2158

Patent

active

039985229

ABSTRACT:
This disclosure teaches a screen such as those generally used for exhibiting projected images. A boxlike frame has a rim formed about its front. A membrane (the projection screen) covers the front with its margin extending to the vicinity of the rim. A cover encloses the back of the frame and is connected in sealed engagement to the margin of the membrane so as to form a plenum. Gas is withdrawn from the plenum whereby the membrane forms a concave image receiving surface curved in a relatively constant degree about a single point so that the image receiving surface takes on a spherical shape.

REFERENCES:
patent: 1330447 (1920-02-01), Pech
patent: 1526715 (1925-02-01), Moon et al.
patent: 2753818 (1956-07-01), Green
patent: 2906169 (1959-09-01), Saffir
patent: 3037424 (1962-06-01), Capetta
patent: 3936159 (1976-02-01), Pavenick

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