Card – picture – or sign exhibiting – Changing exhibitor – Variable reading stationary exhibitor
Patent
1980-04-04
1981-04-28
Pitrelli, John F.
Card, picture, or sign exhibiting
Changing exhibitor
Variable reading stationary exhibitor
40437, 40577, G09F 1914
Patent
active
042637376
ABSTRACT:
A point of purchase advertising display device has a front element and a rear element which are spaced a short distance apart and back illuminated. Primary copy is transparent or translucent on the front element and is repeated on the rear element in translucent form in register with that on the front element. A front fine pattern of transparent and opaque areas occupies the rest of the front element and defines the margins of each character in the primary copy. Translucent secondary copy on the rear element is viewed through parts of the front pattern, and the rest of the rear element consists of a rear fine pattern of translucent and opaque areas which is dissimilar from the front pattern but cooperates with the front pattern to produce a field of changing visual effects as a person moves relative to the display device. The rear fine pattern defines the margins of each character in the copy on the rear element. The appearance of the secondary copy changes clearly but subtly as the visual effects of the field change.
REFERENCES:
patent: Re13109 (1910-05-01), Spiegel
patent: 829492 (1906-08-01), Spiegel
patent: 1867051 (1932-07-01), Bareis
patent: 2221888 (1940-11-01), White
patent: 2355902 (1944-08-01), Berg
patent: 2374371 (1945-04-01), Morch
patent: 2918743 (1959-12-01), Swarbick
patent: 3205598 (1965-09-01), Grosse
patent: 3484969 (1969-12-01), Newland
patent: 3811213 (1974-05-01), Eaves
patent: 3918185 (1975-11-01), Hasala
Pitrelli John F.
Thomas A. Schutz Co., Inc.
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