Patent ID: 8960663
Filing Date: 2015-02-24
Classification: B65H

Abstract:
1. A sheet feeder for separating sheets, including sheets of paper, cardboard and plastic, from a stack having front and rear edges and for feeding the sheets in a sheet travel direction in a sheet travel plane to a downstream sheet processing machine, the sheet feeder comprising: a first suction wheel disposed above the stack and having an axis of rotation; a second suction wheel disposed downstream of said first suction wheel in the sheet travel direction, disposed downstream of the stack, disposed above or below the sheet travel plane and having an axis of rotation; a separation device disposed in vicinity of the rear edge of the stack and configured to lift a respective uppermost sheet off the stack; and said axis of rotation of said first suction wheel disposed at a first distance from the rear edge of the stack, said axis of rotation of said second suction wheel disposed at a second distance from the front edge of the stack and said first distance being greater than or equal to said second distance; said first suction wheel having a periphery with at least one suction and conveying section having a length, said first distance between said axis of rotation of said first suction wheel and the rear edge of the stack being equivalent to said length of said at least one suction and conveying section.