Device for conveying products such as stacks of printed sheets

摘要

A device for conveying product stacks of widely differing thicknesses includes counteracting belt conveyors which are each defined by supported operating strands. At least one of the belt conveyors is adjustable relative to the other such that the stack receiving space therebetween is adjustable as a function of the thickness of the stacks to be transported. The spacing adjustment permits variation of the gap in which the stacks are clamped at either of the receiving or discharge end regions of the apparatus. In a preferred device, the upper belt conveyor includes a swivel frame from which a plurality of resiliently biased pressure rollers are supported. Actuators, responsive to sensed stack thickness, produce tilting of the swivel frame about an axis which is itself movable in a plane oriented transverse to the direction of stack movement.