US 5,311,231 A · Lens-fitted photographic film unit and method for assembling the same

Abstract

A lens-fitted photographic film unit comprises a main body having a photograph-taking function and a rear cover for shielding the rear of the main body in a light-tight manner. The main body has a film supply chamber and a film take-up chamber both of which are provided with respective bottom openings. The film supply chamber is provided with a first side edge limiting plate so as partially to shield the bottom opening. The rear cover is provided with a cap for closing the bottom opening of the film supply chamber and a second side edge limiting plate. A winding shaft is engaged with a film leader of a photographic film, drawn from a photographic film cassette and positioned in a film supply chamber. Similarly, the empty photographic film cassette is positioned in a film take-up chamber. When the rear cover is attached to the main body, an arc-shaped cutout of the first side edge limiting plate faces an arc-shaped cutout of the second side edge limiting plate to form a circular opening through which the winding shaft is inserted and withdrawn. The winding shaft is rotated in the opening to wind up the film thereon. After forming a film roll, the winding shaft is pulled out of the film roll through the opening and the cap is closed to seal the unit light-tightly.

Claims14

Dependent claims

A lens-fitted photographic film unit having a main body which includes a film take-up chamber for containing a photographic film cassette and a film supply chamber for containing a film roll formed after drawing a photographic film from said photographic film cassette, there being an exposure frame between said chambers, said lens-fitted photographic film unit comprising:

a bottom opening formed in a bottom of said film supply chamber;
a rear cover including a rear section covering the rear of said main body;
a first cap for closing said bottom opening of said film supply chamber;
and
side edge limiting means integral with said film unit and permitting a film winding shaft to be inserted into said film supply chamber to wind said film roll thereon but preventing a side edge of said film roll from protruding in a spiral from within said film supply chamber toward the outside thereof when said winding shaft is subsequently pulled out of said film supply chamber.

2 more elements

Dependencies are inferred from the claim text.

Lens-fitted photographic film unit and method for assembling the same

Life of this patent

Lens-fitted photographic film unit and method for assembling the same

Life of this patent

Abstract

Claims14