Method of forming a surface protector with an expansible pocket

Details Method of forming a surface protector with an expansible pocket Method of forming a surface protector with an expansible pocket

1988-02-03

1989-09-12

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

With printing or coating of workpiece

Coating or impregnating workpiece before molding or shaping...

264292, 2642974, 2642975, 264339, 427171, B29C 5324

Patent

active

048657913

ABSTRACT:
A method of forming a selectively expansible pocket or bulge in a thin plastic sheet to facilitate the use of the sheet as a surface protector or shield includes the step of applying oppositely directed forces to the sheet in a plurality of intermeshed closely spaced lines about a predetermined area in which it is desired to form a pocket. The forces are applied until stretching, thinning, and permanent deformation of the sheet takes place along the lines to produce a plurality of permanent corrugations to permit lateral deflection of the predetermined area.

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J. C. Whitney & Co. Cat. No. 451B, p. 18, undated.

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