US430882A - James oliver purnell - Google Patents

Description

(No Model.) J. O. PURNELL.

CUTTING MACHINE.

No. 430,882. Patented June-Z4, 1890.

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UNITED STATES PATENT OFFICE.

JAMES OLIVER PURNELL, OF PITTSFIELD, MASSACHUSETTS, ASSIGNOR TO THE PATENT ELASTIC FABRIC COMPANY, OF SAME PLACE.

CUTTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 430,882, dated June 24, 1890. Application filed October ,4, 1889. Serial No. 325,969. (No model.)

To aZZ whom it may concern.-

Be it known that I, JAMES OLIVER PUR- NELL, a citizen of the United States, residing at Pittsfield, in the county of Berkshire and State of Massachusetts, have invented certain new and useful Improvements in Outting-Wlachincs; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to machines for cutting sheets of various materials into strips, blocks, or irregular shapes, and it is especially adapted to operating upon fabrics, leather, or met-a1.

The invention consists in certain features hereinafter set forth, and particularly pointed out in the claim.

In the drawings, Figure l is a front elevation of my machine. Fig. 2 is an end view, and Fig. 3 is a detail of a cutter.

The power-shaft A is revolubly mounted in brackets B, carried on arms B, projecting from the frame 0 of the machine. The shaft is provided with fast and loose belt-pulleys a a. A sliding belt-shifter D is mounted in standards E, carried on the arms B.

On the shaft A is secured a worm F, which engages with a worm-gear G on the shaft h of the upper roll H, said shaft being mounted in suitable hearings on the frame 0. The lower roll I is mounted on a shaft 11, carried in bearings K, which are secured to the frame 0 by bolts 70, which ride in vertical slots in the frame, to allow the bearings to be vertically adjusted by means of set-screws L. The upper roll is the cutting-cylinder, the lower roll being the cutting-block. They are compelled to run positively at the same speed by the intermeshing gear-wheels M. M, keyed upon their respective shafts.

The knives N are set in the cutting-cylinder in any desired design. To facilitate this the cylinder may be made of wood, or of metal covered with a lagging of wood, or of any other material affording a firm support to the knives and readily penetrated by the screws n, or other devices by which the knives are secured in place.

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A convenient mode of fastening the knives is shown in Fig. 3,where the knife isprovided with a flange and the screw has an eccentric head to overlap said flange. The knives are so ground and set that their edges all lie in the same cylindrical plane, concentric with the axis of the roll H. The lower roll or cylindrical cutting-block I is preferably composed of soft metal, such as a composition of Babbitt metal and tin. It is adjusted toward and from the cutting-cylinder u ntil the knives bear evenly against it as the rolls rotate.

At the front of the machine, and supported between the two end frames, is a feed table or apron 0, preferably inclined downward,as shown. The sheet to be operated upon islaid upon this table and fed in between the rolls by hand. The rolls can be turned forward and backward by the hand-wheel A when adjusting the sheet in position for cutting. The upper roll is surrounded by several rings P of elastic material, preferably rubber, and firmly secured to the roll. Their peripheries stand a trifle farther from the surface of the roll than the edges of the knives, so that the rings are slightly compressed by the cutting- These rings press firmly upon the sheet of material that is passing through the machine, and not only hold it from slipping out of position, but assist in feeding it.

While I have described andshown certain specific arrangements and details of construction, it will be understood that I can modify and alter any of them within the scope of my invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patcut, is-

The combination, with the cutting-cylinder H, provided with the flanged knives N, secured by eccentric-headed screws and surrounded by the ringsP of elastic material, of the soft-metal cylindrical cutting-block L, mounted in vertically-adjustable bearings, and mechanism for rotating the cylinders, substantially as described.

In testimony whereof I affiX my signature in presence of two witnesses.

JAMES OLIVER PURNELL.

Witnesses:

FRANK WALKER,

WAL ER B. HOLLAND.

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