Method and apparatus for fabricating very small two-color balls

Plastic and nonmetallic article shaping or treating: processes – Formation of solid particulate material directly from molten... – Utilizing centrifugal force or rotating forming zone

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264 5, 425 6, 425 8, B29B 910

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059001925

ABSTRACT:
A bichromal ball includes a first hemisphere. The first hemisphere includes a first pigment having a first color and a first polarity. The first pigment is added to a carrier fluid and polymer mixture during formation of the bichromal ball. A second hemisphere includes a second pigment having a second color and a second polarity. The second pigment is added to the carrier fluid and polymer mixture during formation of the bichromal ball. The carrier fluid and polymer mixture have a lower viscosity than the polymer alone. The carrier fluid is substantially removed after the first and second hemispheres are formed. The polymer is left along with the first and second pigments which form the bichromal ball. A diameter of the bichromal ball is reduced after the carrier fluid is substantially removed.

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