Card – picture – or sign exhibiting – Changing exhibitor – Inscription cover
Patent
1981-06-01
1982-06-01
Mancene, Gene
Card, picture, or sign exhibiting
Changing exhibitor
Inscription cover
40409, 368 93, G09F 1900
Patent
active
043320961
ABSTRACT:
A gravity flow display device which is usable for selectively and alternatingly exhibiting two different but conceptually related displays. The device has two thin transparent walled half-hourglass compartments through which displays at their rears are visible. The device further contains non-transparent particulate matter which is capable of flowing from compartment to compartment in response to gravitational force and which is of a sufficient quantity to almost completely fill only whichever of said compartments contains it. When said non-transparent particulate matter is contained within one of the two transparent compartments, the display attached to said compartment is blocked from view.
By alternatingly reversing the comparative position of the two compartments a user can cause the particulate matter to flow from the upper compartment to the lower compartment and thus block from view the display at the rear of said lower compartment while causing the display at the rear of said upper compartment to become visible through said latter compartment.
REFERENCES:
patent: 1002227 (1911-09-01), Corson
patent: 1379642 (1921-05-01), Meeks
patent: 2745198 (1956-05-01), Nelson
patent: 3438197 (1969-04-01), Roer
patent: 3465516 (1969-09-01), Von Meyer
patent: 3692382 (1972-09-01), Cloutier
patent: 3935702 (1976-02-01), Tamada
Kohner Frank
Kohner Michael
Contreras Wenceslao J.
Mancene Gene
The Michael Kohner Corp.
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