Low pressure thermoforming of thin, optical carriers

Details Low pressure thermoforming of thin, optical carriers Low pressure thermoforming of thin, optical carriers

2003-12-04

2008-12-02

Daniels, Matthews J. (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Starting material is nonhollow planar finite length preform...

C264S002700, C264S553000, C425S388000

Reexamination Certificate

active

07459120

ABSTRACT:
A method for thermoforming a thin thermoplastic carrier with uniformity of thickness at optical quality. The sheet to be thermoformed is heated and placed on a vented platform equipped with a mold insert. The thermoformer's platens clamp a shroud over the sheet. A low pressure air stream is introduced into the shroud and deflected from a direct path leading to the mold insert.

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