GB1308755A - Arrangement for discharging measured quantities of powdered or granular filling materials into packaging containers - Google Patents

Abstract

1308755 Rotary conveyers FR HESSER MASCHINENFABRIK AG 19 April 1971 [3 March 1970] 22897/71 Heading B8A [Also in Division G1] In an arrangement for filling cans with measured quantities of granular or powdered materials wherein cans are fed from at least two tare weighers to a common predispenser and thence to at least two control weighers each with an associated make-up dispenser controllable through a calculator connected with the tare weighers and control weighers, gripper arms 8 are provided at each tare weigher 6 which under the control of levers 35 provided with rollers 36 co-operate with a fixed cam 37a to transfer the cans to an intermediate feed disc 11 and at least one part of the cam 37a is of a form to cause the gripper arms 8 to be (i) retarded in the region of the tare weigher 31, (ii) accelerated in the direction of travel, (iii) retarded a second time, (iv) accelerated in the direction of travel a second time and then (v) moved on at substantially a constant speed. The gripper arms 8 are pivotally mounted on spindles 33 in a ring 34 and are connected to the levers 35 which are spring biased to maintain their rollers 36 in contact with the fixed cam 37a. The cam has two recesses 70, 71 and protrusions 72, 73 which cause the required retardations and accelerations of the arms when the ring 34 is rotated. A first feed disc 5 causes cans 2 to slide one at a time on to the tare weighing table 31, to be stopped by an arm 8 while retarded by the second cam recess 71. Then after weighing, the succeeding arm 8, while retarded by the first cam recess 70, strikes the cam and as it is accelerated by the second cam protrusion 73 moves the can on to a plate 38 where it is guided by a rail 40 to a slideway 62 and the intermediate feed disc 11. During this procedure a tube 10 is raised and lowered to blow a flushing gas into the can to flush out the atmospheric oxygen. The gripping arms 8 may be replaced by larger ones appropriate for smaller cans and the arms may be forked.