Display device

Claim 1

A display device comprising a flat sealed container comprising two substantially flat sheets of material supported in closely spaced relation and sealed together at their outer edges to provide a thin chamber, one of said substantially flat sheets of material being substantially transparent, permitting viewing of said chamber therethrough, a quantity of liquid substantially filling said chamber, a small quantity of gas in said chamber sufficient to form bubbles therein upon agitation or inversion of said container, said chamber having a thickness substantially the size of bubbles formed therein upon agitation or inversion of said container, and a particulate material in said chamber in a quantity sufficient to fill a substantial fraction of the height of said chamber when said container is positioned vertically and freely movable to form decorative patterns as viewed through said substantially transparent flat sheet of material, whereby after settling of the particulate material in the liquid in one direction upon positioning said container vertically, said container may be inverted vertically to cause bubbles of the gas to rise and form a bubble layer partially supporting the particulate material while allowing it to percolate downwardly between the bubbles to form a new and different decorative pattern.