Molding devices and process for making a molded plastic lens mou

Details Molding devices and process for making a molded plastic lens mou Molding devices and process for making a molded plastic lens mou

1974-06-20

1976-07-27

Baldwin, Robert D.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264334, 249 59, 249 95, 425808, 425438, B29C 114, B29D 1100

Patent

active

039718417

ABSTRACT:
Molding devices and methods for producing a low cost, multi-element, adjustable focus lens assembly for use in photographic apparatus. The assembly features a two-part molded plastic lens mount comprising forward and rear mounts, each having an uncentered lens element insert molded and centered therein and an integrally molded screw thread for coupling the forward and rear mounts together. The molding devices comprise cavity molds having movably mounted zonal clamps therein for centering the lens element within the cavity and for disengaging the molded mounts from surfaces in the molds that form the screw threads.

REFERENCES:
patent: 2266169 (1941-12-01), Crumrine
patent: 2304984 (1942-12-01), Wood
patent: 2336423 (1943-12-01), Rieser
patent: 2559860 (1951-07-01), Fay
patent: 3241193 (1966-03-01), Pohlman
patent: 3481000 (1969-12-01), Barfuss

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