Apparatus for dispensing doses of pulverulent material

Claim 1

APPARATUS FOR DISPENSING DOSES OF A PULVERULENT MATERIAL, SUCH APPARATUS COMPRISING A DISC HAVING A HORIZONTAL UPPER SURFACE AND ALSO HAVING THEREIN A PLURALITY OF DOSING COMPARTMENTS OPENING AT THE SAID UPPER SURFACE, MEANS FOR ROTATING THE SAID DISC ABOUT A VERTICAL AXIS THE COMPARTMENTS BEING ARRANGED IN A CIRCULAR ROW ABOUT SAID AXIS, A PLURALITY OF PISTONS, ONE ARRANGED SLIDABLY IN EACH OF THE SAID COMPARTMENTS, MEANS FOR MOVING EACH PISTON BETWEEN UPPER AND LOWER POSITIONS IN THE ASSOCIATED COMPARTMENT, THE PISTON IN ITS UPPER POSITION NOT PROJECTING ABOVE THE SAID UPPER SURFACE OF THE DISC, TWO CONCENTRIC RINGS MOUNTED FIXEDLY CLOSELY ABOVE THE UPPER SURFACE OF THE DISC ECCENTRICALLY OF SAID DISC AXIS AND DEFINING BETWEEN THEM AN ANNULAR OPEN BOTTOMED MAGAZINE FOR THE PULVERULENT MATERIAL, THE POSITION OF SAID RINGS BEING SUCH THAT, AS THE SAID DISC ROTATES, EACH COMPARTMENT MOVES ALONG A CIRCUIT PATH WHICH FOR PART OF ITS LENGTH EXTENDS DIRECTLY BELOW THE SAD MAGAZINE AND FOR THE REMAINDER OF ITS LENGTH EXTENDS OUTSIDE THE SAID MAGAZINE, AND MEANS FOR MOVING THE SAID PISTONS CONORDINATED WITH THE ROTARY MOVEMENT OF THE DISC SO THAT, FOR EACH COMPARTMENT, THE PISTON THEREIN MOVES TO ITS LOWER POSITION WHEN THE COMPARTMENT IS DIRECTLY BELOW THE SAID MAGAZINE, WHEREBY MATERIAL IN THE MAGAZINE ENTERS TO COMPARTMENT ABOVE SAID PISTON, AND MOVES TO ITS UPPER PORTION WHEN THE COMPARTMENT IS OUTSIDE OF SAID MAGAZINE, WHEREBY TO DISCHARGE MATERIAL IN THE COMPARTMENT ONTO THE UPPER SURFACE OF THE DISC.