This movement of the bell crank 76 removes the flange 72 from the lug 70 on the spring loaded {TAIL ~ one revolution} clutch 68 thus permitting the rotary knife 64 to be driven by the clutchs spring through {HEAD ~ one revolution} thereby severing the film 32 
This movement of the bell crank 76 removes the flange 72 from the lug 70 on the spring loaded { TAIL ~ one revolution } clutch 68 thus permitting the rotary knife 64 to be driven by the clutchs spring through { HEAD ~ one revolution } thereby severing the film 32
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