Viewer

Details Viewer Viewer

1973-03-01

1976-08-17

Hoag, W.E.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

156 733, 156108, 156251, 156261, 156293, 156298, 156306, B06B 300, B29C 2708

Patent

active

039754740

ABSTRACT:
A 3-D viewer and the method and apparatus for the fabrication thereof, said viewer including a pair of plastic polarized lenses each ultrasonically cut out from a sheet of polarized material simultaneously ultrasonically sealed about a lens opening in a lens receiving frame.

REFERENCES:
patent: 2323518 (1943-07-01), Cochran
patent: 2423583 (1947-07-01), Cooper
patent: 2431238 (1974-08-01), Friedman
patent: 2647852 (1953-08-01), Franklin
patent: 3291669 (1966-12-01), Osher
patent: 3399018 (1968-08-01), Leblanc
patent: 3475521 (1969-10-01), Stroop
patent: 3558407 (1971-01-01), Ballard et al.
patent: 3647612 (1972-03-01), Schrenk et al.
patent: 3704188 (1972-11-01), MacDuff

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