US53169A - Paper-cutting machine - Google Patents

Description

UNITED STATES ArnNT Prien.

CHARLES MONTAGUE, OF HARTFORD, CONNECTICUT.

PAPER-CUTTING MACHINE.

Specification forming part of Letters Patent No. 53, H69, dated March 13, 1866.

To all whom it may concern:

Be it known that I, CHARLES MONTAGUE, of the city of Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Paper-Cutting Machines; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specication, in which- Figure l is a plan or top view. Fig. 2 is an end view. Fig. 3 is a central vertical section.

This invention consists in certain novel arrangements of parts in a papercutting machine by which it is rendered very simple and efficient, and enabled to be very easily and conveniently operated.

To enable those skilled in the art to Linderstand the construction and operation ot' my invention, I will proceed to describe it with reference to the drawings.

A is a solid flat table placed upon the top of the support-ing end pieces, N. At each end of the table are two upright racks, B C, which slide up and down in suitable guides formed upon the end pieces, N. The racks B are counected at the top and above the table by a cross-bar, I, which, with the racks B, form a frame, the office of which is to hold the paper upon the table during the operation of cutting the paper, as will be presently explained. This frame B I is moved up and down by pinions H, firmly attached to the shaft one at each end thereof, and which mesh into the racks B and are operated by the pivoted arm E, provided with a reversible pawl, a.

The racks C are connected at the top by a strong rlat bar, J, also above the table, and forming, with its racks C, the frame which carries the knife. This frame C J is moved up and down by pinions M, which are rigidly secured, one at each end, to the shaft fr', and work in the teeth of the racks C, and are turned by the hand-wheel K. In the upper end of each rack C is a slot, r. The ends of the knifebar 7L are supported in these slots, and a reciprocating motion is given to the said bar by vibrating the lever D, the said lever being pivoted in the front edge of the crossbar J at m, and having its rearmost arm connected to a short spur, d, on the knife-bar 7i by a rod, b.

The knife consists of a long flat blade secured, by screws or rivets, to the bar h.

Upon one end of the same shaft, x, on which the pinions L are situated is a ratchet-wheel, H, and pivoted on the said shaft is arm F, provided with areversible pawl, a, one or the other edge of which is held in contact with the ratchetwheel H by a small spiral spring, e. It will be seen that by causing one edge or the other of this pawl to act upon the ratchet-wheel the frame B I may be moved up or down to clasp or release the mass of paper upon the table A. This frame may be held in any desired position when the arni F is depressed by allowing the pivoted notched bar E to fall upon one of the pinions L, the notches catching upon the cogs thereof and preventing it from turning. A pin, s, projecting inward from the arm H, raises the bar upward out of contact with the pinion when the arm is elevated. The notches in the bar, catching upon the pin s, will also retain the frame B I in position by holding the arm F against the upward pressure exerted by the elasticity ofthe mass of paper compressed by the cross-bar I.

I prefer to use in this machine a knife the cutting-edge of which is formed as follows The knife is rst brought nearly to an edge by filing or grinding in the usual way. It is then covered with waX, and then scratches are made through the wax at the edge of the blade. Thus prepared it is placed in diluted sulphuric, nitric, or other acid which will produce the saine result. The acid etches the blade, so as to form thereon a fine and somewhat irregular serrated edged, which has been found superior for cutting paper to either a plain edge or a serrated one, as usually formed upon the knife.

Such being the construction of the machine the operation is as follows: The mass of paper to be cut (represented in red lines in Fig. 3) is placed upon the table A underneath the cross-bar I, and with its edge below the knife i. The crossbar I is brought firmly down upon the paper by raising the arm F, which operates the frame B I by means of the pawl a acting upon the ratchet-wheel H, as hereinbefore set forth, the frame being held down upon the paper by t-he bar E catching upon the pin s and preventing the backward or downward motion of the arm F. This being done, the operator grasps the hand wheel K with one hand and the lever D with the other. By slowly turning the hand-wheel the toothed racks B C, pnions L M, and shafts a.' fr', substantially as herein set forth.

2. The notched bar E, piroted arm F, re-

Versible paWl a, and ratchet-Wheel H, arranged i With reference to each other and With therack and pinion of the clamping-frame B I substantially as set forth, for the purpose speeied.

CHARLES MONTAGUE.

HENRY T. BROWN,

Witnesses:

J. W. GooMBs.

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