Patent ID: 6854915

Claim:
In combination, a binder cover formed of a stiff plastic material having an inside hidden surface and an outside exposed surface and at least one window opening with an enclosed perimeter defined therewithin, a flat, transparent plastic, protective sheet residing in direct contact with said inside surface of said cover and having a peripheral margin that extends about said perimeter of said window opening, and a flat, plastic backing sheet having a peripheral margin about its perimeter and wherein at least one access slit is defined in said backing sheet at said window opening, and said backing sheet resides in direct contact with and is fused to said protective sheet by interior lines of heat sealing that at least partially surround said enclosed perimeter of said window opening and said peripheral margin of said backing sheet and said peripheral margin of said protective sheet are fused directly to each other and to said inside surface of said cover at peripheral lines of heat sealing so that said protective sheet is located between said cover and said backing sheet, whereby said access slit permits insertion and withdrawal of flat display objects between said protective sheet and said backing sheet.