Patent ID: 7594648
Filing Date: 2009-09-29
Classification: B65H

Abstract:
1. A gripping unit for gripping a paper from a top surface of a stack, comprising a first friction wheel and a second friction wheel, said first friction wheel and second friction wheel having rotation axes that are mainly parallel with respect to each other and being arranged to exert a friction force on sections of a paper, the gripping unit further comprising an actuator on which the first friction wheel is mounted for moving the first friction wheel towards the second friction wheel, wherein the first friction wheel is arranged to rotate with respect to its axis during the movement towards the second friction wheel such that a paper section on which the first wheel exerts the friction force is forced into the direction of the second friction wheel, said gripping unit further comprising an airflow generator providing a flow of air between a paper being gripped and at least one of a surface below the paper and a surface above the paper.