Roll film and a photographic camera for use therewith

In a roll film having a leader provided with an aperture adapted to be engaged by a capturing member of a rotatable film take-up spool, the improvement comprising a flexible tongue element extending forwardly into the aperture, said tongue element being adapted to flex out of the surrounding film plane upon initial engagement with said capturing member and subsequently to snap back to a substantially unflexed condition as the capturing member fully enters the aperture and the tongue element detentably cooperates with the capturing member.

In a photographic camera adapted for use with roll film having a leader provided with an aperture and a flexible tongue extending forwardly into the aperture, the camera including a rotatable film take-up spool and a film capturing member mounted on the take-up spool and adapted to engage the film leader, the improvement wherein said film capturing member comprises a head surface, a leading surface and a trailing surface, at least a portion of the trailing surface being recessed relative to the head surface, the rotation of the take-up spool being adapted to sequentially cause (1) the leading surface of the capturing member to enter the leader aperture with a portion of the head surface engaging the tongue, (2) the head surface to flex the tongue out of the plane of the surrounding leader and (3) the film to move a position whereat the tongue can snap back to a substantially unflexed capturing position in the recessed porion of the trailing surface to secure the film to the take-up spool.

In a photographic camera adapted for use with roll film having a leader provided with an aperture and a flexible tongue extending forwardly into the aperture, the camera including a rotatable film transporting film take-up spool and a film capturing member mounted on the take-up spool and adapted to engage the aperture, the improvement wherein the film capturing member has a recess for receiving the tongue, and wherein the film capturing member is accommodatingly larger than the film aperture when the tongue is unflexed but accommodatingly smaller than the film aperture when the tongue is flexed, the film transporting rotation of said take-up spool causing the film capturing member to flex the tongue out of the surrounding film plane thereby permitting the film capturing member to pass through the film aperture and subsequently causing the film to move to a position whereat the tongue can snap back to a substantially unflexed capturing position in the recess.