Lens barrel made by injection molding

Details Lens barrel made by injection molding Lens barrel made by injection molding

1986-09-18

1989-05-02

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

2643288, 264DIG57, 350254, 350255, 350505, 354286, 354288, 425586, 428412, B29C 4513

Patent

active

048264245

ABSTRACT:
A lens barrel member in which an equally divided helicoid portion is provided on the inner periphery or the outer periphery of a cylinder member forming a lens barrel, and an engaging portion engaged with another lens barrel component is provided at the end of the outer periphery of the cylinder member coaxially with the helicoid portion, the cylinder member being of a sandwich-molded structure comprising a core layer and a skin layer. Also disclosed is a method of molding such lens barrel member.

REFERENCES:
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patent: 3690797 (1972-09-01), Garner
patent: 3733156 (1973-05-01), Garner
patent: 3801684 (1974-04-01), Schrewe et al.
patent: 3809519 (1974-05-01), Garner
patent: 3873656 (1975-03-01), Garner
patent: 4029841 (1977-06-01), Schmidt
patent: 4052497 (1977-10-01), Monnet
patent: 4110008 (1978-08-01), Vesugi et al.
patent: 4152064 (1979-05-01), Hashimoto et al.
patent: 4152065 (1979-05-01), Kobori
patent: 4196997 (1980-04-01), Ohmori et al.
patent: 4213686 (1980-07-01), Kellner
patent: 4247600 (1981-01-01), Adachi

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