Method and apparatus for transporting layers of paper sheets to processing machines

US4629058A · kind A · utility

Assignee

• E.C.H. Will GmbH · DE

Inventors

• Klaus Reissmann · Hamburg, DE
• Friedhelm Herrig · Hamburg, DE

Key dates

• Filing date: May 24, 1984
• Grant date: Dec 16, 1986
• Expiry date: May 24, 2004

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65G47/31
• WIPO field: Handling
• WIPO sector: Mechanical engineering

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 t…