Cylinder cam 1 is oscillated by link 4 about fixed axis A. Roller 5 of link 2 rolls and slides along groove a of cam 1. The profile of groove a provides for oscillation of link 2 about fixed axis B and its reciprocation along this axis. In this motion, member 3, which grips the cloth, has a motion whose path Q is shown in the left-hand view. Positive motion is achieved by the action of weight b.
$3285$CmL,FD$