When crank 1 rotates about fixed axis A, point E of connecting rod 2 describes path a-a. Connecting rod 2 is a prong which kneads the dough in vessel 3. Slider 4 moves along a circular guide of radius D͞C and with its centre at point D. The mechanism is equivalent to four-bar slider-rocker arm linkage ABCD in which AB is the crank and CD is the rocker arm.
$1677$SC,FD$