Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1979-08-13
1981-07-14
Hoag, W. E.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
264255, 2642711, B29C 500, B29D 300
Patent
active
042786266
ABSTRACT:
A process for embedding photographs in dome-shaped transparent castings. Casting material is charged into a mold. A portion of the photograph is applied to the surface. The migration of gases from the casting material is monitored. As the gases migrate from the casting material, the photograph is continually applied over the surface. Subsequently, the mold is charged with additional casting material forming a completely embedded photograph in a dome-shaped casting which is transparent and free from bubbles.
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Anon., Rohm & Haas, "Embedding Biological Specimens in Acrylic Plastic", (1947), Phila., PA., pp. 1-5, relied on.
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