Method and apparatus for transporting layers of paper sheets to

Details Method and apparatus for transporting layers of paper sheets to Method and apparatus for transporting layers of paper sheets to

1984-05-24

1986-12-16

Valenza, Joseph E.

Conveyors: power-driven

Conveyor system for arranging or rearranging stream of items

By longitudinally respacing successive articles in stream

198460, 198575, 198577, 198579, B65G 4731

Patent

active

046290583

ABSTRACT:
Apparatus for delivering singularized stacks of paper sheets to a packing machine has a first conveyor which intermittently receives groups of several abutting stacks and is intermittently driven by a variable-speed electric motor to advance the groups onto the individual endless bands of a gathering conveyor which serves to accumulate the groups into a row of abutting stacks ready to be singularized and delivered to the packing machine. The bands of the gathering conveyor are normally driven at a constant speed by a prime mover which further drives a first encoder serving to transmit a first signal whenever the bands cover a unit distance. A second encoder generates second signals whenever the motor is on and the first conveyor covers the same unit distance. The motor can also drive the bands at a speed higher than that at which the bands can be driven by the prime mover whenever the speed of the first conveyor exceeds the speed of the bands. The first and second signals are compared in a stage which controls the speed of the motor and can turn the motor off during the intervals of stoppage of the first conveyor, either for the purpose of receiving a fresh group of stacks or for the purpose of segregating one or more stacks from those which are destined for delivery to the first conveyor. During stoppage of the first conveyor for the purpose of receiving a fresh group, the first signals are transmitted to a first counter which then causes the stage to influence the motor so as to drive the first conveyor at a higher than normal speed as soon as the delivery of a group is completed. If the first conveyor is arrested during segregation of one or more stacks, the first signals are stored in a second counter which thereupon influences the stage to establish in the series of singularized stacks gaps at appropriate intervals enabling the packing machine to perform idle cycles.

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