Releasable attachment for connecting a film strip to a film cassette spool

摘要

Film cassettes normally include a spool on to which a film strip is wound. However, the film strip is normally fixed to the spool and needs to be severed therefrom prior to processing. Described herein is a releasable attachment for connecting a film strip to a spool. As film strip (40) is modified to include a cut-out portion (44) spaced from aperture (42) which engages a protrusion (20) in slot 18. The releasable attachment is provided by inserting the film strip (40) into the slot (18) until aperture (42) engages with protrusion (20). Subsequent withdrawal of the film strip (40) is achieved by further inserting the film strip (40) into the slot (18) to disengage the aperture (42) from the protrusion (20), and until the cut-out portion (44) clears shoulder portion (24) of the slot (18). At this point, the film strip (40) flips up out of slop (18) and as the film strip is removed in the direction of arrow 'C', shoulder portion (24) supports it so that aperture (42) and protrusion (20) cannot be re-engaged. <MATH>