Photographic film unit

Claim 1

A PHOTOGRAPHIC FILM ASSEMBLY COMPRISING, IN COMBINATION, A FILM UNIT INCLUDING AN ELEMENT HAVING A LIGHTSENSITIVE STRATUM, A RUPTURABLE CONTAINER SECURED TO SAID FILM UNIT ADJACENT SAID PHOTOSENSITIVE STRATUM AND A FLUID COMPOSITTION, CAPABLE OF PROCESSING SAID LIGHT-SENSITIVE STRATUM, RELEASABLY CARRIED WITHIN SAID CONTAINER, A FIRST LIGHTTIGHT ENVELOPE FOR ENCLOSING SAID FILM UNIT, SAID ENVELOPE HAVING LIGHT-OPAQUE FRONT, REAR AND SIDE WALLS AD ONE END WALL AND BEING OPEN AT ONE END AND COMPRISING A PAIR OF SUBSTANTIALLY RIGID FRAME MEMBERS HAVING APERTURES SUBSTANTIALLY COEXTENSIVE WITH ONE ANOTHER AND DEFINING SAID FRONT AND REAR WALLS, MEANS FOR SECURING SAID FRAME MEMBERS TOGETHER IN FACING RELATION A FIXED DISTANCE APART AT THIER LATERAL MARGINS AND AT ONE END MARGIN TO PROVIDE A SPACE BETWEEN SAID FRAME MEMBERS FOR SAID FILM UNIT, AND LIGHT-OPAQUE COVER MEANS REMOVABLY SECURED TO SAID FRAME MEMBERS AT LEAST ACROSS SAID APERTURES THEREIN FOR CLOSING SAID APERTURES AND FORMING SAID ENVELOPE, SAID FILM UNIT BEING LOCATED WITHIN SAID ENVELOPE THROUGH THE OPEN END THEREOF, AND A SAID COVER MEANS WITH AN END PORTION THEREOF PROJECTING FROM SAID ENVELOPE THROUGH THE OPEN END THEREOF, AND A SECOND ENVELOPE SECURED TO SAILD FILM UNIT IN SURROUNDING RELATION TO SAID END PORTION AND DISPOSED IN OVERLAPPING LIGHTTIGHT ENGAGEMENT WITH SAID FIRST ENVELOPE IN THE REGION OF SAID OPEN END THEREOF FOR PREVENTING THE ADMISSION OF LIGHT INTO SAID ENVELOPE.