US1137925A - Doffer-ring. - Google Patents

Description

0. L. TAFT.

DOFFER RING.

APPLICATION FILED MAY 26, I913.

Patented May 4, 1915.

WWW 5 R 27. 26%170/110/ 3 fly 6 y E 4 171%) vney ORMAN L. TAFT, OF WORCESTER, MASSACHUSETTS.

DOZEFEB-RING.

Specification of Letters Patent.

Patented May a, 1915.

Application filed May 26, 1913. Serial No. 769,818.

T all whom it may concern:

Be it known that I, ORMAN L. TAFT, a citizen of the United States, residing at Worcester, in the county of Worcester and Commonwealth of Massachusetts, have invented a new and useful Improvement in Dofler-Rings, of which the following, together with the accompanying drawing, is a specification.

My invention relates to doifer rings for use in card clothing machinery.

One object of the invention is to provide an improved form of doffer ring in which the face of the endless band which supports the teeth is formed without joints or splices.

In the doffer rings in use at present, the faces of the bands which support the teeth are formed by splicing together the two ends of a suitable strip of material. The piercing of this band by the teeth as they are placed in position is apt to injure the splice, thus making it necessary to repair the splice. Even if not so injured, the splice often separates more or less so as to allow the ends of the strip to turn up sufficiently to be caught and further damaged by the teeth on the main cylinder of the machine. After such a splice has separated sufliciently to allow the ends of the band to turn up in this way, the further use of the ring is, of course, impracticable, at least until the defective splice has been repaired. By providing a ring with no splices or joints in the face of the tooth supporting band, the objections referred to are overcome and the life of the ring is consequently much increased.

The invention is illustrated in the accompanying drawing in which- Figure 1 is a view of a dofier roll of a carding engine with a set of my doffer rings carried upon the roll; Fig. 2 is a view of 4 the backing and the jointless facing of my improved dofi'er rings; Fig. 3 is a view of the backing and facing after being placed together; and Fig. 4: is a view of a short section of the doffer ring after the teeth have been placed in position.

Like reference characters refer to similar parts in the different figures.

The dofier rings 1 made in accordance with my invention include teeth 2 for transferring fibers of wool being carded from the main cylinder of the machine to the rub roll in a manner well known to those familiar with the art. These teeth are supported and carried by a band or support which is preferably formed in two sections, a backing 3 and a facing A. The backing is of leather, or other suitable material, and may be formed by joining the ends of a strip of such material by a splice or joint 5, this backing strip being of such length that it will fit properly about the dofier roll 6 as shown in Fig. 1. The facing 4 may be of felt, or other suitable material, and, in accordance with my invention, it is formed in an endless band or ring without splices 01' joints. Such a jointless facing ring may be formed by weaving a seamless tube of the proper diameter and then cutting short transverse sections from this tube. The facing 4 is of such dimensions that it will fit properly outside the backing 3 as shown in Fig. 3, the facing and backing being cemented securely together to form a support or carrier for the teeth which are afterward placed inposition. Any form of teeth may be used, the commonest and best known being short U-shaped pieces of wire forced through the band or support from the inside so that each wire forms two outwardly projecting teeth. After being forced into position through the support, the teeth are sharpened by grinding. The teeth are inserted through both thicknesses of the ring, being arranged in staggered relation preferably, as is usual in devices of this class. The same mechanism for inserting such teeth, is used as is used when a continuously moving fiat strip of ring material is being operated upon. However, in operating upon a hoop or ring of the character shown in the drawings such mechanism must necessarily omit the insertion of a short length of the teeth to form the card clothing, and such short space or distance must subsequently be filled with teeth inserted by hand.

While I have shown and described a twopart support or carrier for the teeth, I do not wish to be limited thereto, as it is within the scope of the invention to provide a supporting band or carrier for the teeth, the face of the band being without splices or joints, but the band being otherwise of any form and construction and composed of any materials desired.

Having described one form of my invention, what I claim as new and desire to secure by Letters Patent is:

1. As a new article of manufacture, a dofi'er ring comprising a support for a plu- -ing and facing and '10 backing and facing forming Copies of this patent may be obtained to:

it. A doifer ring including a leather back- 15 ing, a jointless felt facing, the backing and facing forming a support, and teeth carried by the support. p

5. A dofi'er ring including a leather backing, a jointless felt facing cemented to the 20 backing, the backing and facingrforming a support, and teeth carried by the support.

Dated this 22nd. day of May, 1913.

ORMAN L. vTAFT.

Witnesses:

PENELOPE COMBERBAGH, NELLLE WHALEN.

five cents each, by addressing the Commissioner of Patents,

Washington, D. 0.

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