Calendars and display devices

Details Calendars and display devices Calendars and display devices

1975-09-18

1977-10-25

Eickholt, E. H.

Card, picture, or sign exhibiting

Display card

Folded

35 26, 35 53, 40 28R, G09F 1900

Patent

active

040550117

ABSTRACT:
A calendar has transparent overlay pages which carry opaque calendar data areas and opaque picture portions which are superimposed on an underlying picture, with the opaque picture portions depicting the underlying obscured portions at a different season of the year.
An overlay sheet with a transparent area is movable to positions where it overlies either a first base sheet or a second base sheet. An opaque picture portion in the transparent area is formed to be camouflaged when overlying one of the base sheets; and, the opaque picture portion presents a visible pictorial element when it overlies the other base sheet. An opaque area on the overlay sheet causes messages first to be concealed when the overlay sheet is in one position and then to be revealed when the overlay sheet is moved to its other position.

REFERENCES:
patent: 2149779 (1939-03-01), Kroner
patent: 2220527 (1940-11-01), Kroner
patent: 2294465 (1942-09-01), Lasker
patent: 2670961 (1954-03-01), Winters
"The Inside Story" Simmons, July 1947.
The World Book Encyclopedia, 1974, vol. 9, pp. 378-379.
Structure, 1941, General Electric Company.

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