Apparatus for cutting stiff sheet material

Details Apparatus for cutting stiff sheet material Apparatus for cutting stiff sheet material

1979-01-29

1980-07-08

Meister, J. M.

Cutting

Other than completely through work thickness or through work...

Combined types of cutting

834712, 83485, 83614, 83508, B26D 308, B26D 120

Patent

active

042111374

ABSTRACT:
Apparatus for cutting stiff sheet material. A straightedge barrier aligns the material. A back supporting the material includes a first bar perpendicular to the straightedge barrier. Along one edge of the first bar is a straight strip blade having a shearing face and a cutting edge making an acute angle with the shearing face, preferably of about 15.degree.. On a second bar, spaced from and parallel to the first bar, is a carriage in rolling engagement with the second bar and carrying a series of rotatably supported shearing rollers, preferably at least four. The rollers are substantially coplanar, the axes for the first three lie along a line inclined to the blade and getting successively closer thereto, and are frustoconical at an inclination of about 6.degree.. The fourth roller is mounted somewhat closer than it would be if its axis lay along that line and is the only roller which extends beyond the cutting edge into engagement with the shearing face of the blade, being spring-urged thereagainst. The first roller urges the sheet material against the cutting edge, and the succeeding rollers force the shearing action.

REFERENCES:
patent: 371961 (1887-10-01), Mason
patent: 3403709 (1968-10-01), Retherford et al.
patent: 3706251 (1972-12-01), Wheeler
patent: 3762249 (1973-10-01), Wheeler

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