US326859A - Paper-cutting machine - Google Patents

Description

(N0 Model.) 2 Sheets-Sheet 1.

W. G. FINLAY.

PAPER CUTTING MACHINE.

No. 326,859. Patented Sept. 22, 1885.

l Mae N. Pneus. nawumnwpner. vla-nimm u. c.

(No Model.) Y 2 Sheets-Sheet 2.

W. 8. HNLAY.

PAPER CUTTING MACHINE. No. 828,859. Patented Sept. 22, 1885.

Unire STATES PATENT Trice,

PAPER-CUTTING MACHINE.

SFECIFICATON forming part of Letters Patent No.326,859, dated September 22` 1885.

Application tiled November 14,1884. (No model.)

To all whom t may concern:

Be it known that I, WILLIAM G. FINLAY, of Lawrence, in the county of Essex and State of Massachusetts, have invented certain improvements in Paper-Cutting Machines, of which the following is a specification.

This invention relates to machinery for cutting a web of paper into sheets; and it has for its object to provide mechanism for rotating the roll that feeds the web of paper forward and the revolving knif'e that cuts the paper into sheets.

The invention consists in the combination, with the feed-roll and revolving knife, of a shaft geared directly to the arbor of the feedroll, and another shaft geared directly to the arbor of the revolving knife, expanding pulleys on said shafts, and a belt connecting said pulleys, the shaft geared to the feed-roll being driven by a prime motor and imparting motion to the other shaft, which in turn revolves the knife, the relative speed of the knife and feed-roll being governed by the eX- panding pulleys, all of which I will now proceed to describe.

Of the accompanying drawings, forming a part of this specification, Figure l represents a side elevation of a paper-cutting machine provided with my improvements. Fig. 2 represents a front elevation of the same.

The same letters of reference indicate the same parts in all the gures.

In the drawings, f represents the supporting-frame of the machine, having bearings for one or more niandrels, on which are wound Webs of paper to be cut.

g represents the feed-roll journaled in the frame f, and having on its arbor a large gear, r.

c represents a shaft provided with an eX- panding pulley, P, and with a pinion, s, which meshes with the gear r. The shaft c has a pulley at one end, on which runs a driving-belt, j, which rotates the shaft c and roll g at a uniform rate. From the roll g the paper passes between the fixed knife It and the revolving knife Z, whereby the web of the paper is severed into sheets, said knives being of the usual construction. The revolving knife is secured to two heads, m m, afiixed to an arbor, a, having at one end a gear-Wheel, o, meshing with a pinion, p, on a second shaft, o', having another expanding pulley, P, which is connected by a belt, q, with the pulley on the shaft c. At each revolution of the knife Za sheet is cut corresponding in length to the rapidity of rotation of said knife, the paper always passing to the knife at a uniform rate of speed under all circumstances.

The expanding-pulleys P P are each preferably composed of two sections, a a, each of which is frusto-conical in shape and is slotted longitudinally, the tapering peripheries of the sections being thus converted into fingers separated by open spaces. The fingers are rigidly connected to the base or larger end of each section, which is provided with a central tapped boss or nut, b, the nut of the one section having left-hand threads, while the nut of the othersectionhasright-handthreads. Theshaft c, upon which the pulley is supported, passes through said nuts, and is provided with right and left hand screw-threads corresponding with those of the nuts, so that when the shaft is rotated and the sections of the pulley are prevented from rotating the two sections will be moved simultaneously in opposite directions by the right and left screw-threads. The sections a a are placed on the threaded shaft with the fingers of the one section entering the slots of the other, thus forming a doublecone pulley having its smallest diameter midway between its ends, where the peripheries of the two parts intersect. The larger ends or bases of the sections are provided with slots s, Fig. l, which coincide with the slots in the peripheries of the sections, the slots s of each section end or base receiving the iingers of the other section when the two sections are telescoped, as hereinafter described. It will be seen that when the sections c ct are moved inwardly on the shaft or toward each other the diameter at the intersecting point will be increased, and when the sections are moved outwardly on the shaft said diameters will be decreased, so that the diameter of the belt-supporting surface of the pulley will be varied in proportion to the movement of the sections, which may be telescoped or moved inwardly until their larger ends almost meet, the ngers of each section projecting through the slotted bases of the other section, as shown at the lower portion of Fig. 2, thus present- IOO ing the largest possible central diameter, or may be separated,las shown at the upper portion of Fig. 2, until the smaller ends are almost separated and the smallest possible een tral diameter is presented. The shaft c is provided with jam-nuts d d, to hold the sections at any points to which they may be adjusted on the shaft.

When desirable to alter the length of a sheet of paper, the speed of the revolving knife'is varied as follows: 1f a longer sheet is to be cut, the sections of the pulley P that are situated on the shaft c are moved toward and into each other until the belt-supporting diameter is enlarged sufficiently, and at the same time the sections of the pulley on the other` shalt, c, are moved from each other in the same ratio. This operation causes the cutting-knife to rotate slowly, and causes a longer sheet of paper to be cut off. The operation is reversed when a shorter sheet of paper is required, lh us causing the cutting-knife to rotate at an increased velocity and form shorter sheets.

I do not limit myself to the use of pulleys of the described construction, but may use any form of expanding-pulley that can be .mounted and adjusted on the shafts c c.

It will be seen that by the employment of the two shafts c c' geared directly to the feedroll and knifearbors,land provided with eX- panding-pulleys, enables motion to be communicated from the feed-roll to the knife through one belt only, thus reducing the liability of accidental variation between movement of the feed-roll and knife caused by slipping of belts to the minimum, and making the mechanism simple and compact.

I claim- In a paper-cutting machine, the feed-roll and revolving knife having gears affixed to their arbors, combined with the shafts c c', geared, respectively, to the feed-roll and to the rotary knife and provided with expandingpulleys connected by a belt, as set forth. In testimony whereoflhave signed my name to this specification, in the presence of two subscribing Witnesses, this 11th day of November, 1884:.

WILLIAM G. 'EINLAY.

Witnesses:

GEORGE E. MILLER, ZACIIARY T. MERRILL.

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