Camera body and method of manufacture thereof

Details Camera body and method of manufacture thereof Camera body and method of manufacture thereof

1977-09-01

1979-05-01

Griffin, Donald A.

G03B 1702

Patent

active

041520653

ABSTRACT:
A camera body, particularly useful for a camera of the interchangeable lens type, includes a front metal unit having a mount member to which an interchangeable lens is attachable, a rear metal unit having an exposure framing aperture, film rail surfaces, an abutting surface on which a film pressure plate is abuttable and a mount surface to which the front metal unit is attached, and a body proper molded of a reinforced plastic with the rear metal unit imbedded therein and having a pair of box shaped main portions which are disposed at opposite sides of the rear metal unit and a pair of laterally extending portions which interconnect the main portions. The rear metal unit is provided with perforations formed as casting holes and packed and filled with the plastic and is of box shape with the front wall being open and the four peripheral walls being continuous with each other. Upon molding of the plastic body proper, smooth flow of the molten plastic is achieved and blow holes are minimized in the main portions when the molten plastic is injected into the cavity through the perforations of the rear metal unit so that it flows into the spaces of the cavity corresponding to the main portions through the spaces of the cavity corresponding to the interconnecting portions.

REFERENCES:
patent: 3380361 (1968-04-01), Winkler
patent: 4067032 (1978-01-01), Yoshikawa et al.
The Asahi Camera, Japanese Magazine, Nov. 1967, p. 242.
Popular Photography, Minox 35 El, Jul. 1976, p. 43.
Modern Plastics, vol. 25, No. 11, Jul. 1948.
Plastics Engineering, pp. 107-111.

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