Film cartridge for photographic cameras and method of assembly

Claim 2

A casing for a film cartridge for storing in stacked relationship a stack of film units and a dark slide having on an end thereof a curtain for covering an end of the stack of film units, said casing comprising: a relatively flat, box-like body having spaced top and bottom walls, a pair of opposed side walls, and one end wall; a second end wall for closing at least a part of the open end of said body after said body has been loaded with said stack of film units and said dark slide, said second end wall including projection meaNs disposed on the inner surface and adjacent at least one edge thereof and extending into the casing enclosure for displacing at least one margin of said dark slide curtain away from said second end wall as said second end wall is being secured to said body of said casing to preclude attachment of said one margin of said curtain to said casing.

Claim 3

The casing defined by claim 1 wherein said projection means comprises a pair of projections, one adjacent each side edge of said second end wall, spaced from the respective side edges of said second end wall a distance greater than the sum of the thickness of the casing side wall and the thickness of said curtain, such that when said second end wall is secured to said body of said casing, said projections are each spaced from the associated casing side wall a distance sufficient to preclude capture of said curtain between said projections and the associated casing side walls.

Claim 4

The casing defined by claim 1 wherein said projections have a generally arcuate profile.

Claim 5

A film cartridge, comprising: a relatively flat, box-like casing having spaced top and bottom walls, a pair of opposed side walls, and one end wall; spring platen means disposed in said casing and supported by said bottom wall thereof; a stack of film units on said spring platen means; a dark slide on said stack of film units, said dark slide having on an end thereof a curtain for covering an end of said stack of film units adjacent an open end of said casing; and a second end wall for closing at least a part of said open end of said casing after said casing has been loaded with said stack of film units, said spring platen means and said dark slide, said second end wall including projection means disposed on the inner surface and adjacent at least one edge thereof and extending into the casing enclosure for displacing at least one margin of said dark slide curtain away from said second end wall as said second end wall is secured to said body of said casing to preclude attachment of said one margin of said curtain to said casing.

Claim 6

A film cartridge, comprising: a relatively flat, box-like casing having spaced top and bottom walls, a pair of opposed side walls, and one end wall; spring platen means disposed in said casing and supported by said bottom wall thereof; a stack of film units on said spring platen means; a dark slide on said stack of film units, said dark slide having on an end thereof a curtain for covering an end of said stack of film units adjacent an open end of said casing; and a second end wall for closing at least a part of said open end of said casing after said casing has been loaded with said stack of film units, said spring platen means and said dark slide, said second end wall including projection means disposed on the inner surface and adjacent at least one edge thereof and extending into the casing enclosure for displacing at least one margin of said dark slide curtain away from said second end wall as said second end wall is secured to said body of said casing to preclude attachment of said one margin of said curtain to said casing.

Claim 7

The film cartridge defined by claim 4 wherein said projection means comprises a pair of projections, one adjacent each side edge of said second end wall, spaced from the respective side edges of said second end wall a distance greater than the sum of the thickness of the casing side wall and the thickness of said curtain, such that when said second end wall is secured to said body of said casing, said projections are each spaced from the associated casing side wall a distance sufficient to preclude capture of said curtain between said projections and the associated casing side walls.

Claim 8

The film cartridge defined by claim 5 wherein said projections have a profile accommodating a space formed between said end of said stack of film units and said second end wall.

Claim 9

The film cartridge defined by claim 6 wherein said profile is generally arcuate.