Display device

Details Display device Display device

1986-07-21

1987-08-18

Mancene, Gene

Card, picture, or sign exhibiting

Display device with gas or liquid movement

40407, 40409, 40410, 350 42, 353 2, G09F 1900

Patent

active

046867848

ABSTRACT:
A display device comprises a sealed flat container formed by two rectangular sheets of glass 10,11 spaced from each other by a small amount and sealed together by a glue layer 12 at their outer edges. The container encloses water and detergent, a quantity of air and fine sand 26. After settling of the sand in one direction, the container is inverted causing bubbles 27 of the air to rise and form a bubble layer partially supporting the sand while allowing it to percolate gradually downwardly between the bubbles.

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patent: 4521982 (1985-06-01), Altuchow

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