Photo film pack for self-developing photo film units with light-shielding cover sheet, and instant camera

An instant camera loadable with an instant photo film pack, said instant photo film pack including a plurality of self-developing photo film units and a pack for containing said photo film units, said pack including a box-shaped pack body, an exposure opening, an exit slit and at least one pad insertion opening each formed in said pack body, and a bottom light-shielding member disposed in said pack body, each one of said photo film units being exposed by light passed through said exposure opening, and exited through said exit slit by advancing an advancing edge thereof, and said bottom light shielding member closing said pad insertion opening, said instant camera comprising:

• a pack chamber loadable with said instant photo film pack;
• a door for closing said pack chamber in an openable manner;
• and
• a pad member, disposed on an inside of said door, inserted in said pad insertion opening upon closing of said door, for pushing said photo film units toward said exposure opening with said bottom light-shielding member, wherein said pad member is insertable into said pack body by a distance L1 minus L2, where L1 is an internal height of said pack body, and L2 is a sum of a thickness of a stack of said photo film units and a thickness of said bottom light-shielding member;
• wherein said bottom light-shielding member includes a central opening for insertion of a support ridge disposed centrally in said pack body and adjacent said pad insertion opening.

An instant camera loadable with an instant photo film pack, said instant photo film pack including a plurality of self-developing photo film units and a pack for containing said photo film units, said pack including a box-shaped pack body, an exposure opening, an exit slit and at least one pad insertion opening each formed in said pack body, and a bottom light-shielding member disposed in said pack body, each one of said photo film units being exposed by light passed through said exposure opening, and exited through said exit slit by advancing an advancing edge thereof, and said bottom light shielding member closing said pad insertion opening, said instant camera comprising:

• a pack chamber loadable with said instant photo film pack;
• a door for closing said pack chamber in an openable manner;
• and
• a pad member, disposed on an inside of said door, inserted in said pad insertion opening upon closing of said door, for pushing said photo film units toward said exposure opening with said bottom light-shielding member, wherein said pad member is insertable into said pack body by a distance L1 minus L2, where L1 is an internal height of said pack body, and L2 is a sum of a thickness of a stack of said photo film units and a thickness of said bottom light-shielding member;
• wherein said bottom light-shielding member includes a flexible bottom light-shielding sheet for closing said pad insertion opening, and a push plate for pushing said photo film units in a regularized manner with said bottom light-shielding sheet by transmission of force from said pad member;
• said bottom light-shielding sheet being partially secured to an inside of said pack body, produced from plastic material having compatibility with said polystyrene material of said pack body, and having a thickness of 0.3-0.45 mm;
• a portion of said bottom light-shielding sheet being secured to said push plate;
• and
• said push plate being produced from plastic material having compatibility with said polystyrene material of said pack body, and having a thickness of 0.5-1.0 mm.