Sheet understacking feeding mechanism

A sheet mechanism for feeding sheets which have a leading edge and a trailing edge comprising an accumulating area having a rear end and a front end, means for feeding at least one sheet into said accumulating area, an exit mechanism, means for moving sheets from said accumulating area through said exit mechanism, said feeding means are adapted to feed a plurality of sheets into said accumulating area to form a stack of sheets, said moving means being adapted to move a stack of sheets through said exit mechanism, support means are provided to keep the trailing edge of a previous sheet fed in the accumulating area uplifted until the leading edge of a subsequent sheet is moved beneath the previous sheet, said exit mechanism comprises a pair of exit rollers, a stack of sheets being adapted to pass between said exit rollers when moving through the exit mechanism, a pusher mechanism is provided adjacent the rear end of said accumulating area and means are provided adjacent the rear end of said accumulating area to activate the pusher mechanism to push a stack of sheets out of the accumulating area, said pusher mechanism activating means comprises means to swing the pusher mechanism back and forth from a position behind a stack of sheets in the accumulating area to a forward position to push a stack out of the accumulating area.