Sliding cam 1 reciprocates a long fixed guide d. Knife lever (follower) 2 oscillates about fixed axis B and has tip a which slides along the working surface of cam 1. When knife lever 2 is turned clockwise by cam 1, upper knife b descends until it cuts the cloth which lies on movable shoe c which is operated by a separate mechanism (not shown). Lever 2 is returned to its initial position by spring 3.
$3159$SmC,FD$