Perforate projection screen

Details Perforate projection screen Perforate projection screen

1990-05-11

1991-04-30

Wintercorn, Richard A.

350119, 52 81, G03B 2156

Patent

active

050112635

ABSTRACT:
A perforate projection screeen for movies, planetariums and the like having uniform reflectivity throughout its visible surface.
The screen is made from a plurality of perforate panels and is mounted, when in use, with a dark non-reflective chamber behind the screen. Any overlapped areas of the panels and any frame members or other objects, in close proximity to the back of the panels are covered with a black velour type material having vertically extending fibers to absorb the light rays entering the holes in those areas of the panels and thereby prevent light reflection from such holes which would cause undesirable light strips or areas to be visible in the overlapped portions of the screen or in the area of the screen where frame members or other objects are in close proximity to the back of the panel.

REFERENCES:
patent: 2238365 (1941-04-01), Hurley
patent: 2366761 (1945-01-01), Walker
patent: 2699090 (1955-01-01), Underhill, Jr.
patent: 3260156 (1966-07-01), Komitor
patent: 3632185 (1972-01-01), Meanor
patent: 3692384 (1972-09-01), Kimura et al.
patent: 3992841 (1976-11-01), Ward, Jr.
patent: 4057323 (1977-11-01), Ward, Jr.
patent: 4750807 (1988-06-01), Chamayou Dit Felix

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