Screen for projection television

Details Screen for projection television Screen for projection television

1981-09-01

1984-10-23

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Nonplanar uniform thickness material

350117, 350125, 4283171, 4283188, G03B 2156, B32B 514, B32B 520, B32B 712

Patent

active

044789025

ABSTRACT:
A screen for projection television set comprising a foamed support and a reflective film adhered to the concave side of the support, said support having the outer layers with a high density such as 0.7 to 1.2 g/cm.sup.3 and the inner portion with a low density so as to make the density of the foamed support as a whole 0.2 to 0.5 g/cm.sup.3, has good projection properties, surface hardness with sufficiently strong support. When said support is foam molded by using a polyurethane having special polyol components, its heat resistance is remarkably increased and can be foam molded at high temperatures without deformation.

REFERENCES:
patent: 3072582 (1963-01-01), Frost
patent: 3091551 (1963-05-01), Robertson

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