Patent ID: 7976001

Claim:
A sheet stack cutter for cutting sheet stacks by means of a moving cutter edge and a stationary cutter edge disposed upward and downward along a predetermined cutting-plane line, comprising: a sheet loading table for supporting the sheet stack, a press means for pressing and holding the sheet stack on the sheet loading table, a moving cutter edge disposed in a manner of moving in up and down cutting directions for cutting the sheet stack on the sheet loading table along the cutting-plane line, a stationary cutter edge disposed to the side of the sheet loading table for pressing the moving cutter edge to cut the sheet stack, a drive means for moving the moving cutter edge in up and down cutting directions, and an apparatus frame furnished with the press means and the moving cutter edge, wherein the press means is composed of a pressure member for pressing the sheet stack on the sheet loading table, a pressure spring for urging the pressure member to the side of the sheet stack, and a pressure releasing means for retreating the pressure member above the sheet loading table, the stationary cutter edge is supported to the apparatus frame movably back and forth in a plane direction of the sheet loading table substantially crossing with the vertically cutting directions of moving the moving cutter edge, and an urging means suppresses the stationary cutter edge to the side of the moving cutter edge, and the pressure member and the stationary cutter edge are disposed such that pressure of the pressure member by the pressure spring acts on the stationary cutter edge, and the stationary cutter edge is restrained from moving in the direction crossing with cutting by pressure of the pressure member.