Method and apparatus for fabricating bichromal balls for a twisting ball display
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United States of America Patent
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Nov 16, 1993
Issued Date -
N/A
app pub date -
Apr 12, 1993
filing date -
Dec 23, 1992
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An apparatus for fabricating hemispherically bichromal balls, comprising a separator member having opposing first and second surfaces located and an edge region in contact with both surfaces, and delivery means for flowing first and second colored hardenable liquid material over the first and second surfaces, respectively, so that the liquid materials arrive at the edge at substantially the same flow rate and form a reservoir outboard of the edge region. The reservoir comprises side-by-side regions of different colors which do not intermix. Further means is provided for propelling the first and second liquid materials away from the separator member and out of the reservoir into a fluid medium as a plurality of side-by-side bichromal streams whose forward ends become unstable and break up into droplets which form into spherical balls, each of the balls comprising hemispheres of differently colored hardenable liquid, and means for collecting the bichromal balls.
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Cited Art Landscape
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