US689921A - Paper-cutting machine. - Google Patents

Description

Patented Dec. 3|, I90l.

6. SEYBULD.

PAPER CUTTING MACHINE.

(Application filed May 13, 1901.)

(No Model.)

flaw afar MJ WA mafia/6536s drug I iifai'lzey UNiTnn STATES CHARLES SEYBOLD,

PATENT OFFICE.

OF DAYTON, OHIO.

PAPER-CUTTING MACHINE.

SPECIFICATION forming part Letters Patent No. 689,921, dated December 31, 1901.

Applioatign filed May 13,1901.

To all whom, it may concern.-

Be it known that I, CHARLES SEYBOLD, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and usefullmprovementsin Paper-CuttingMachines, of which the following is a full, clear, and eX- act description, reference being bad to the accompanying drawings, forming part of this specification.

My improvements relate to machines for cutting of paper, in which a clamp-bar is employed for clamping and holding rigid the paper while being acted on by the cuttingknife. In this class of machines it is of course essential that the paper-stock shall be held as rigidly as possible under the cut of the knife, and in order to obtain the maximum amount of pressure at the cutting edge it has long been customary to bevel off the lower face of the clamp, say, at a two-degree angle to the horizontal. As heretofore constructed, however, the cutting-table has been flat, so that the paper-stock when under the clamppressure has been flat on the table and slightly inclined at the top. The result of this has been that the paper-stock, being confined at the back by the back gage, has been very liable to slip and become displaced at the bottom of the pile when the clamp-pressure is applied. It is to overcome this defect that my invention is directed.

In the drawing the figure is a side elevation of so much of the cutting-table of a paper-cutting machine as will illustrate my invention.

I have not considered it necessary to show in any detail the working parts of my papercutting machine, as the invention is applica ble to any machine for the cutting of paper in which a cuttingtable, clamp, and knife are employed, and I have therefore illustrated only those parts that will make clear my improvements.

Ais a portion of the cutting-table, B the back gage, O the clamp, D the cutting-knife, E the paper-stock, and F the cutting-stick, of any well-known construction of paper-cuttin g machine. I have herein shown the lower clamping-face a of the clamp O as being beveled on a two-degree angle, so that the maximum pressure of the clamp shall be applied Serial No. 59,984. (No model.)

to the paper-stock Eat the front cutting edge, as indicated at 1), although the said clampingface may be constructed on a substantially horizontal plane.

In planing off the cutting-table A that portion of the table in front of the groove for the cutting-stick is left slightly higher than the portion to the rear of this groove--say from one thirty second to one sixteenth of an inchand the groove is formed with side walls slightly inclined, so that in cross-section the sides of the groove shall be at right angles to a line joining the upper edges of the groove, as b. In this way when the square cuttingstick F is in place its upper face will slope upwardfrom rear tofront at about the same angle as the bevel of the clamp and in the opposite direction. lVith this construction when the clamp-pressure is exerted the paper-stock at the bottom is bent slightly upward to the same extent that it is bent downward at the top, and there is no liability whatever of any slip or displacement of the paper under the action of the knife. In the construction I have illustrated about four-fifths of the surface of the cutting-stick lies back of the stroke of the knife, and the upward slope of the table is given by the surface of the cutting-stick. The same result can of course be obtained in other ways-for example, by planing a slight rise in the table up to the groove and arranging for four-fifths or more of the stick-surface to lie in front of the knife-stroke, so that the effect is obtained by the table instead of the stick; but the construction I have illustrated appears the cheapest and the best. Instead of the square stick I have shown the round cutting-stick can also be used.

The essential feature of my invention consists, it will be readily understood, in so ar ranging the lower surface or base upon which the paper-stock rests that there shall be an upward bend to the paper corresponding to slightly beveled toward the cutting edge, of

a table-surface slightly beveled in the opposite direction, to counteract the tendency to displacement of the lower sheets of paper.

2. In a paper-cutting machine, the combination with a clamp having its clamping-face slightly beveled toward the cutting edge, of a cutting-table, the surface of which is slightly higher in front of the knife-stroke,with groove for the cutting-stick, Whose side walls are slightly inclined, whereby the top surface of the cutting-stick shall present a slight incline opposite to the incline 0f the beveled clamp. 1

3. In a paper-cutting machine, the combi-. nation with a clamp, of a cutting-table, the surface of which is slightly higher in front of the knife-stroke, with groove for the cuttingstick, whose side walls are slightly inclined, whereby the top surface of the cutting-stick shall present a slight incline toward the rear of the table.

' CHARLES SEYBOLD.

Witnesses:

FRANK H. HERBST,

EDMUND LINXWEILER.

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