Method of forming a surface protector with an expansible pocket
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United States of America Patent
Stats
-
Sep 12, 1989
Grant Date -
N/A
app pub date -
Feb 3, 1988
filing date -
Feb 3, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
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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