Meshing gears 1 and 2, of equal pitch diameter, rotate about fixed axes A and B. Links 6 and 7 are connected by turning pairs F and G to gears 1 and 2 and to each other by turning pair E. Points C and D of kneading members 3 and 4, rigidly attached to links 6 and 7, describe complex connecting-rod curves q and l. The dimensions of the links comply with the condition: F͞E=G͞E. In the initial position, lines AF and BG coincide with line AB and are in opposite directions. Kneading member 4 can be clamped in various positions with respect to link 7. Additional rotary motion of vat 10 is obtained by worm 8 which rotates about fixed axis C and meshes with worm wheel 9 of vat 5.
$2543$LrG,FD$