Instant photo film pack

An instant photo film pack comprising:

• a box-shaped pack case for containing a stack of plural self-processing photo film units;
• an outlet slit, formed in said pack case, for exiting an exposed one of said photo film units therethrough;
• a light-shielding flap, having a substantially quadrilateral shape, for closing said outlet slit in a light-tight manner, said light-shielding flap having first and second longer side lines and first and second shorter side lines;
• and
• first, second and third predetermined adhering regions disposed on said light-shielding flap, at least said first, second and third adhering regions being coated with adhesive agent in said light-shielding flap and attached to said pack case, wherein said first adhering region extends along said first longer side line, and said second and third adhering regions are disposed respectively at said first and second shorter side lines, and offset from an extension of said outlet slit, said outlet slit being disposed between said second and third adhering regions, said first, second and third adhering regions being interconnected in such a channel shape that said outlet slit is located inside arrangement thereof.

An instant photo film pack comprising:

• a box-shaped pack case for containing a stack of plural self-processing photo film units in a sheet shape, said pack case having first and second walls;
• an exposure opening, formed in said first wall, for providing a first one of said photo film units with an exposure therethrough;
• an outlet slit, formed in an end wall of said pack case, for exiting exposed said first photo film unit therethrough;
• first and second shifting projections, disposed between said exposure opening and said outlet slit to project from an inner face of said first wall, positioned close to first and second end portions of said outlet slit, for pushing and deforming first and second lateral edges of said first photo film unit;
• and
• first and second recesses, formed with said outlet slit by spreading said first and second end portions toward said second wall, for allowing passage of said first and second lateral edges deformed in said outlet slit.