Patent ID: 11097567

Abstract:
A paper stack S supplied between clamping plates 1a, 1b of a carriage clamp 1 is pushed toward a positioning bar 2b by an alignment bar 5. A nip head 7 of a paper stack supplying unit 3 has first and second nip plates 9, 10, and a nip plate drive mechanism 11 moving each nip plate from a protruding position at which the nip plate protrudes from the nip head and a retracted position at which the nip plate retracts into the nip head, and translating the second nip plate taking the protruding position relative to the first nip plate taking the protruding position between a first position at which the first and second nip plates receive the paper stack therebetween and a second position at which the second nip plate cooperates with the first nip plate to grip the paper stack.