Sheet handling device

Claim 1

IN A SHEET HANDLING DEVICE FOR REPETITIOUSLY PLACING WORK SHEETS INTO, AND REMOVING WORK SHEETS FROM, A REFERENCE POSITION ON A MACHINE TOOL: A LOADER, INCLUDING A POWER ROTATING JIB CRANE AND A POWER HOIST, FOR TRANSFERRING BY ROTATION AND TRANSLATION A SHEET FROM A FIRST STACK OF SHEETS AT A FIRST POSITION INTO THE REFERENCE POSITION; AN UNLOADER INCLUDING A RECIPROCATING CARRIAGE JOURNALLING A SYSTEM OF POWER OPERATED ROTATING PINCH ROLLS WHICH MOVE OVER AND SELECTIVELY CLAMP ONTO TH WORK SHEET IN THE REFERENCE POSITION, FOR TRANSLATING A SHEET FROM THE REFERENCE POSITION TO A SECOND POSITION, AND A STACKER HAVING A DROP BAY WITH DOORS HINGED ON A HORIZONTAL AXIS FOR RECEIVING THE SHEET FROM THE FIRST MEANS AND DROPPING THE SHEET ONTO A SECOND STACK, AND ELECTRICAL CONTROL MEANS FOR AUTOMATICALLY OPERATING THE LOADER AND THE UNLOADER INCLUDING THE RECIPROCATING CARRIAGE AND THE STACKER, WHEREIN THE SHEETS ARE TAKEN FROM THE FIRST STACK AT THE FIRST POSITION BY THE LOADER AND PLACED IN A SECOND STACK AT THE SECOND POSITION BY THE UNLOADER.