Patent GB-797216-A (GB)
Title: A conveying device
IPC: B65G47/00
Filed: 1955-07-04
Abstract: 797,216. Filling-machines. ZAVODY V. I. LENINA PLZEN NARODNI PODNIK, and BARTA, J. July 4, 1955 [July 21, 1954], No. 19318/55. Class 94(1). [Also in Group XXX] A device for conveying material supplied by a preceding machine A to a succeeding machine B and for equalizing differences in the rate of supply of the material and the speed of operation of the succeeding machine, comprises an endlessbelt conveyer 1 for receiving the material and supplying it to the succeeding machine B, an elongated feeder trough 9 above and parallel with the conveyer 1 for receiving the material from the preceding machine A and feeding it onto the conveyer 1, means for driving the conveyer 1 in synchronism with the succeeding machine B and means for moving the feeder trough 9 in the direction of movement of the conveyer 1 if the supply of material from the machine A lags behind that discharged to the machine B and for moving the feeder trough 9 against the movement of the conveyer 1 if the supply of material from the preceding machine A exceeds the discharge of material to the succeeding machine B. As shown, containers 4 are mounted on the endless-belt conveyer 1 and empty into a receiving means 21 in a packaging machine B, the containers 4 and the means 21 being synchronized. The trough 9 contains an endless-belt 10 and weighed quantities of material discharged from a weighing machine A falls onto the belt 10 and is carried down towards a gate 12 and when the weight is sufficient the gate 12 opens and the material falls into an empty container 4 below. The trough 9 is moving with and at the same speed as the cups 4 but as the gate 12 opens it closes some electrical contacts 47, and through a delay mechanism 48 and a solenoid 49, causes a catch 50 to release a lever 51 controlling some gears. These gears then allow the trough 9 to move down-hill until the lever 51 is again arrested by the catch 50 at which instant the trough 9 will be aligned with the next empty container 4 and will move uphill therewith. If the weighing machine A is working too slowly the trough 9 will gradually work its way up the incline and in so doing it will cause a counterweight 19 to descend until it closes some electrical contacts 57 in a circuit which then stops the drive of the packing machine B. Alternatively, a mechanical stopping device could be used. The endless-belt 1 is now stationary, but the weighing machine A and the trough 9 continue to function and when the trough 9 has moved sufficiently far downhill the counterweight 19 is raised to a position at which it closes some contacts 56 to start the packaging machine B and endless-belt 1 again. Similarly, if the weighing machine A operates too fast the trough 9 will eventually descend to such a level that the counterweight 19 will close some electrical contacts 55 to stop the weighing machine A and with it a shaft 38 from which the downward movement of the trough 9 is derived. Now the trough 9 commences to move uphill until the counterweight 19 is raised to a position at which it closes some contacts 58 to cause the weighing machine A and the shaft 38 to operate again. Alternatively means may be included to speed up or slow down the weighing machine A in dependance upon the number of filled containers 4 on the conveyer 1.