Transparency fabrication method

Details Transparency fabrication method Transparency fabrication method

1975-11-17

1977-10-04

Kendall, Ralph S.

Plastic and nonmetallic article shaping or treating: processes

With incorporating dye susceptible material or dyeing workpiece

8 4, 8 14, 8147, 8148, 8158, 8159, 35 425, 118 55, 118 56, 118409, 264 1, 264 89, 264 92, 353 62, 427231, 427232, 427240, 427346, B29C 900, D06P 300

Patent

active

040524949

ABSTRACT:
A method and apparatus utilized in forming a hemispherical shape from a cast thermoplastic acrylic resin sheet or the like, dyeing the inside surface of the hemisphere to provide a uniform color density or a color density variation increasing from light to dark from the horizon to the zenith point of the hemisphere, heating the hemisphere to its forming temperature, causing it to revert to a flat sheet, and reverse forming the hemisphere to have the dyed surface on the outside.

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patent: 3653941 (1972-04-01), Bell
patent: 3726953 (1973-04-01), Jones
patent: 3762083 (1973-10-01), Lemons et al.

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