Patent ID: 7976013
Filing Date: 2011-07-12
Classification: B65H

Abstract:
1. In a paper feeder apparatus, the combination comprising; a) first means including a support for a paper stack and transfer elements for successively transferring paper sheets from the top of the stack upwardly and laterally to a delivered position, b) and optical control means to determine the level of an upper paper or papers in the stack to control the vertical positioning of papers in the stack, to enable said upwardly and laterally sheet delivering as the stack height diminishes, and c) a controller for cyclically controlling said transfer elements to integrate cyclic upward and lateral movement of successive sheets transferring from the stack, d) said transfer elements including operating means including suction elements to alternately adhere to top papers in the stack, and to release the top papers after their transfer toward conveyor means, said operating means including swingable parts to control suction delivery to the suction elements in timed relation to elevation of the suction elements with top papers attached, e) and whereas said parts include a first lever swingable to control said suction delivery, and a second lever movable in response to elevation movement of the suction elements, accompanied by actuation of the first lever, f) and including captivating means to temporarily captivate the first lever in swung position and during a dwell interval and until the second lever returns toward a position of first lever de-activation, said captivating means being movable by the second lever to release the first lever to swing toward a position in which suction to the suction elements is re-established.