Rotary piston forming machine for chocolate

A machine for use in forming chocolate and the like, comprising at least one hopper containing a product to be delivered, characterized in that it includes, located downstream of said hopper, a contoured metering and stirring cavity accommodating a rotatively driven rotor provided with spaced apart collars and rotary pistons, said rotor defining in said cavity a plurality of movable chambers on one side thereof in the form of chambers with annular adjacent metering segments, and on the other side thereof, a stirring chamber, a delivery valve located downwardly of each rotor and being mounted for oscillating movement, said delivery valve having a detent segement for movement into and from said movable chambers in the nature of a movable wall, said delivery valve having a delivery conduit with an intake port to said detent segment, and a passage depression adapted to permit, with said detent segment removed from the associated annular metering chamber, the unhindered passage of the related rotary piston above the respective delivery valve.