Round eccentric 1 rotates about fixed axis A. Follower 2 is designed as a yoke having flat parallel faces b-b which are continuously in contact with the circumference of eccentric 1. Follower 2 carries roller 3 which rolls and slides a long continuous groove e in the circumference of cam 1. Follower 2 reciprocates in fixed guides p-p and oscillates about fixed axis D. Thus, when eccentric 1 rotates, claw a of follower 2 has a complex motion, rotary about axis D and translatory along guides p-p, in which it is inserted into a perforation of the film, advances the film and is withdrawn from the perforation.
$3212$SmL,OC$