US77518A - Joel mou - Google Patents

Description

J0EE MOULTON, OF BOSTON, MASSACHUSETTS.

Letters Patent No. 77,518, dated May 5, 1868.

IMPROVEMENT IN THE MANU]E'A0'.l3UlEtE 0E ELASTIG ROLLS.

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TO ALL TO WHOM THESE PRESENTS suaLL COME:

Be it known that I, JOEL MoULToN, of Boston, in the county of Suffolk, and State of Massachusetts, have invented a new and useful Improvement in the Manufacture of Elastic Rolls, and in material for" constructing such rolls, as well as for other purposes; and do hereby declare the following to be a full, clear, and exact description thereof, due reference being had to the accompanying drawings, making part of this specification, and in which I Figure l is a perspective view, showing my invention in a preparatory state.

Figure 2 is a transverse section. of a finished roll.

Figure 3, a face view, and

Figure 4 a transverse section of modifications of my invention.

My present invention may be considered in the light of an improvement upon that shown and described in Letters Patent, No. 75,292, and bearing date thelQth day of March, 1868, and issued to me for an improved mann facture of elastic rolls, and consists in means ofproviding for greater security against slipping of the elastic body of the roll about or upon its shaft, as well as a novel mode of combining the fibrous material with the rubber, whereby equally good results are obtained at considerable decrease in cost, as compared with the mode,

shown in Letters Patent before referred to. I

In carrying out the first portion of my invention, I takea strip, a, of Woven webbing, about three-fourths of an inch in width, or thereabouts, and apply to its opposite strides two strips 6 b, of thin vulcanized India rubber, leaving a narrow space, 0, in the middle of the webbing, upon each side thereof, and between such rubber strips. I then fold the strips of webbing in the centre, and enclose in the fold a metallic wire, d, and wind the folded strip spirally about the shaft e, from end to end thereof, between its journals, the whole being then subjected to the ordinary vulcanizing process, which makes a firm, compact, and, to some extent, homoe genous mass of the rubber and webbing.

In winding the strip containing, the metallic wire about the shaft e, previous to vulcanizing the former, it is to be applied thereto with considerable power, and the ends of suchwire securely fiired to the shaft.

The employment of the metallic wire confines-the elastic body of the roll to its shaft in a much closer man= ner, and causes it to cling more tightly thereto than would be thecase were the wire to be omitted, and render slipping of the roll about the shaft nearly or quite impossible.

The object in applying the elastic strip of rubber to the webbing, as before described, is to bring the Web-' bing alone in contact with the shaft.

I do not, of course, intend to confine myself to the before-described mode of preparing the strips before apply ing the wire thereto, as this may be varied considerably without changing the character'of this portion of my invention, which embraces thelidea of closely confining the elastic roll to its, shaft by means of a metallic wire.-

In carrying out the second portion of my present invention or improvement,.I apply transversely to a sheet, or between two sheets of vulcanized rubber, a layer or range'of-strands of fibrous material, and subsequently cut this sheet into ribbonsof the desired width,at right angles to the length of the strands, and proceed to form the strips substantially asbeforedescribed.

The object of thismode of applying the strands, as compared with the employment of the woven webbing, as shown in Letters Patent before referred to, being, as before observed, to reduce the cost of manufacture, which practice has determined results from such application of the strands, at the same time enabling me to retain the advantage resulting from the radiating of the strands from the circumference of the shaft outward.

As a packing for the pistons of steam-engines, as well as for various other purposes, the combination of the rubber and the fibrous strands, as before explained, will be found to be of value. I would remark that a string can be employed instead of a metallic wire.

I claim as my invention, and desire to secure by Letters Petent- 1. As a means of more securely fixing the body of an elastic roll to its shafts, the employment therewith of a metalliewire or string.

2. The mode, herein described, of applying the strands of fibrousmoterial to a sheet, or between two sheets, of vulcanized rubber, essentially in manner and for the purpose as set forth.

JOEL MOULTON. Witnesses:

EDWARD GRIFFITH, FRED. CURTIS.

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