Crank 1, rotating about fixed axis A, is designed in the form of disk a rotating in fixed ring b. Connecting rod 2 is connected by turning pair C to crank 1. The upper end of connecting rod 2 slides in link 3 which turns about fixed axis B. When crank 1 rotates about axis A, the lower end of connecting rod 2 describes connecting-rod curve c which is used for the kneading operation. The shape of the curve can be varied by axial adjustment of connecting rod 2, clamping it in the required position.
$1454$LG,FD$