International Business Machines Corporation

Roger D Emeigh

Nelson K Arter

Michael A Bartholet

Marion J Herman

A stapler mechanism for fastening variable thickness documents includes a stack receiving receptacle disposed between the head/hammer assembly and the clinching or anvil assembly of said stapler. A sensing device is coupled to the stapler mechanism and generates control pulses indicative of relative motion between the head/hammer assembly. A controller processes the signals and generates control signals which vary the stroke and the force driving the hammer and returns the head/hammer assembly to its home position following a stapling cycle.

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Longmont, CO, United States of America

Roger D Emeigh