Method of vacuum forming disposable faceshield

Details Method of vacuum forming disposable faceshield Method of vacuum forming disposable faceshield

1988-06-14

1990-08-21

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Starting material is nonhollow planar finite length preform...

264 27, 264553, 425388, B29C 5110

Patent

active

049504452

ABSTRACT:
A method of making a protective shield with an optically clear viewing portion by vacuum forming over a mandrel wherein the viewing portion of said protective shield is maintained out of contact with the mandrel to define the optically clear viewing portion.

REFERENCES:
patent: 2367642 (1945-01-01), Helwig
patent: 2440499 (1948-04-01), Ames et al.
patent: 3971687 (1976-07-01), Greer et al.
patent: 4352776 (1982-10-01), Weisner et al.

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