Changeable letters for signs

Details Changeable letters for signs Changeable letters for signs

1995-05-31

1996-08-06

Vrablik, John J.

Card, picture, or sign exhibiting

Illuminated sign

Lamp box

40618, G09F 1304, G09F 710

Patent

active

055422020

ABSTRACT:
A changeable letter for signs is provided as a part of an illuminated sign or copy board system which provides different appearances when the changeable letters are alternately backlit or frontlit. The letter, understood to include letters, symbols and numerals, includes a translucent plate and first, second or additional layers of opaque, indicia-defining material applied thereto. The second layer is preferably of a lighter color than the first layer, and when superposed thereon, presents the appearance of a lighter colored letter surrounded by a darker border. However, when the letter is backlit as it would appear at nighttime positioned on an illuminated sign, the letter presents a black or otherwise darkened appearance surrounded by the lighted portion of the sign.

REFERENCES:
patent: 885426 (1908-04-01), Bittle
patent: 1116803 (1914-11-01), Dainoff
patent: 1644742 (1927-10-01), Moynihan
patent: 2143731 (1939-01-01), Gallas
patent: 4292752 (1981-10-01), Clark
Americraft Corporation, Florida Plastics Brand E-Z Change flat changeable copy catalog, 1984.

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