US507713A - Veneer-cutting knife - Google Patents

Description

UNITED STATES PATnNT OFFICE.

E' HENRY J. MARK, OF ST. LOUIS, MISSOURL VENEER-CUTTING KNIFE.

SPECIFICATION formng part of Letters Patent No. 507,'713, dated October 31, 18 93.

Application filed October 27, 1892. Serial No. 150,094. (No model.)

To all whom it may concern:

Be it known that I, HENRY J. MARK, of St. Louis, Missouri, have made a new and useful Improvement in Veneer-Cutting Knives, of which the following is a full, clear, and exact description.

The improvement relates more especially to the cutting edge of the knife, which consists substantially as is hereinafter set forth and claimed, aided by the annexed drawings, making part of this speciication, in which- Figure 1 is a side elevation of the improved knife, looking toward th at side thereof which is presented to the block from which the Veneers are cut; Fig. 2 an elevation of the opposite side of the knife; Fig. 3 alongitudinal section on the line 3-3 of Fig. 1; Fig. 4 a longitudinal section on the line 4:-5L of Fig. 1; and Fig. 5 a cross section on the line 5-5 of Fig. 1.

The same letters of reference denote the same parts.

The knife A is of suitable material, and of proper size and dimensions, substantially as shown, for veneer-cutting work. That side, B, of the knife which is presented to the piece of Wood from which the veneers are cut is fluted, the flutings b extending longitudinally in the knife, and to the cutting edge thereof, substantially as shown. The opposite'side, C, of the knife is flat. The cutting edge, D, is beveled, the bevel being formed upon the reverse side, d, of the cutting-edge, as shown. The cutting edge of the knife is thus in the form of a serration, or rather a series of beveled points d', each of which is adapted to make a shearin'g cut. At the same time, by

reason of its oblique direction shown, the edge D, as a whole, is adapted to .cut in a shearing manner. In addition to this advantage the improved knife can be readily sharpened by turning its beveled side to the sharpening tool. The knife at its side edges, a, a', is suitably shaped substantially as shown to adapt it to be held in theusual knife-holder, not shown. The cutting edge being ol)- lique, performs two funotions, viz the ordinary function of giving the terminalor outer edge a shearing eifect, and the additional function of giving the depressions between the teeth the same or similar effect. In addition, the intervals between the series of teeth allow each tooth to take hold of the material to be cut suocessively, thus giving each tooth a shearing efect of its own and at the same time necessitating less driving power to accomplish the result than would be the case of a' fluted knife without an oblique edge or a knife with an oblique edge and not serrated.

I claim- A veneer cutting knife consisting of a flat and a fiuted side, an ob'lique s'errated cutting edge, a beveled sharpening surface formed on the flat side and co-operating with the fluted side, whereby a series of individually shearing cutting teeth is formed, substantially as set forth.

Witness my hand this 24th day of October, 1892.

HENRY J. MARK.

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