US2597858A - Covering for textile machinery rollers - Google Patents

Description

y 7, 1952 A. FREEDLANDER COVERING F OR TEXTILE MACHINERY ROLLERS Filed Jan. 2, 1947 $70M ATTORNEYS INVENTOR ABRAHAM L. FREEDLANDER FIG. 6

Patented May 27, 1952 COVERING FOR TEXTILE MACHINERY ROLLERS Abraham L. Freedlander, Dayton, Ohio, assignor to The Dayton Rubber Company, a corporation of Ohio Application January ,2, 1947, Serial No. 119,789

. 3 Claims.

This invention deals with coverings for rollers as they are used in textile machinery, e. g. for spinning, drafting or the like apparatus, and in particular with aprons, cots and similar units.

Rollers used in textile machinery usually have a small diameter, and the coverings therefore have to stand a high degree of curvature. It has always been difiicult to; make aprons, cots or similar roller coverings sufficiently flexible so that they fitsnugly such small rollers and at the same time .to make these coverings rigid and resistant to deformation so that no traveling occurs.

It is an object of this invention to provide coverings for rollersof textilemachinery which have a high degree of flexibility and at the'sarne time a high resistance to deformation-causing stresses. I I

It is another object of this invention to provide coverings for rollers of'textile machinery which do not travel during use but remain on the rollers during their entire service life.

It is still another object of this invention to provide coverings for rollers of textile machinery in which any frictional heat created on one surface of said covering is not conveyed to the other surface thereof.

It is still another object of this invention to provide coverings for rollers of textile machinery which are relatively inexpensive.

These and other objects are accomplished by reinforcing the neutral axis zone of the coverings by means of fibrous glass material.

The invention will be more fully understood from the following description taken in connection with the accompanying drawings, in-which Figure 1 is an elevational view of a pairof rollers as they are used in textile machinery, one of said rollers being illustratedpartly in cross section inorder to show the. construction of the covering thereon;

Figure 2 is a cross section on an enlarged scale of one of the rollers of Figure 1 taken along line 2-2 thereof;

Figure 3 is a perspective fragmentary view of a modified form of covering with parts thereof removed in order to show certain details more clearly;

Figure 4 is a perspective view of a cable suitable for the reinforcement of the neutral axis zone of the covers of my invention;

Figure 5 is a perspective view of another modification of a cable as it may be used to reinforce the neutral axis zone of the coverings of my invention;

Figure 7 is a fragmentary perspective view of still another modification of my invention.

Referring to the drawings in detail, and in particular to Figures 1 to 2, reference numeral I0 designates an axle shaft on which two rollers l l and [2 are mounted. Each roller has a rubber covering [3 on its circumference. The cover 13 comprises an inner compression section V I4, a neutral axis section [5, and an outer tension section 16. The neutral axis section, in the instance illustrated in Figures 2 and 3, comprises two layers of longitudinally and parallelly extending glass cords [1. These cords I! are embedded in rubber or rubber-like composition. The tension and compression sections are also formed of rubber materials. While any kind of rubber is suitable for the coverings of my invention, it is advantageous to use a softer and more cushioning composition for the compression section and a harder and more resilient rubber composition for the tension section.

In Figure 3 a covering similar in structure to Figure 2 is illustrated with the exception that cords Ila are shown arranged in staggered relationship instead of being superposed as are cords I! in Figure 2. In Figure 4, a cable is illustrated which may b used in the neutral axis zonein place of the cords ll. This cable 2| is formed of aplurality of cords22, each of which again is built of short glass staples. The shortglass staples provide for a relatively rough surface, a feature which enhances the bond of the reinforcing members with the rubber material of the coverings;

Another modification of a cable, which also gave excellent results, is illustrated in Figure 5. There, plain glass cords l9 individually covered by a cushioning material 20, such as rubber, resin, or the like, are twisted into a cable 18. The individual coatings 20 provide for a reduction of the friction between the glass cords of the cable and thus reduce breakage thereof and consequently damaging of the rubber layers. Moreover, the coatings 20 increase the bond between the glass and the rubber of the neutral axis zone.

Another embodiment of my invention is illustrated in Figure 6. There, the compression section is designated with 23, the neutral axis section with 24, and the tension section with 25. The neutral axis section is reinforced by independent individua1 glass fibers 25 of diiferent lengths; these fibers have been calendered into the rubber of the neutral axis zone so that they extend substantially parallelly to each other and to the longitudinal axis of the covering.

This modification is even more flexible than those shown in the previous figures due to the use of thinner and discontinuous glass fibers; yet the resistance to deformation is still relatively high, since the staples overlap with regard to their lengths.

In Figure 7 the compression section-is designated with the reference numeral 21, the neutral axis section with 28, and the tension sec.- tion with 29. There, the neutral axis section is reinforced by glass fibers which are matted into a blanket 30.

The various coverings of my invention are formed by building up the layers consecutively on a mandrel, by then cutting the built up layers into the width desired of the textile unit and then curing these units in a mold. During'vulcanization the rubber flows between and around the reinforcing elements and thus provides for a firm anchorage therebetween.

Although the bond between the 'glasselements and the rubberis sufiiciently high, it'is advantageous in some instances to apply a coating on the glass elements either of rubber material, resin, or other materials known to the art whereby the bond is'still increased.

In the case of using cords as the reinforcing elements, one layer'or several layers maybe used. If more than one layer is used'a staggered arrangement may be chosen which arrangement is another means of increasing the resistance to deformation and of providing for a more uniform distribution of the strength elements. The more layers of cords or of other reinforcing elements are used, the thinner the individual members thereof may be'made. The thinner the individual glass members are, the higher the flexibility will be; yet "the resistance, to deformation will not be reduced thereby.

All rubbers customary in the art-maybe used for the article of my invention. However,-butadienecopolymers and neoprene are preferred.

It will be evident that the reinforcing elements may be either made entirely of, glass or of any combination of other materials with glass. Thus, for example, textile cords'or fibers, plastic materials, or the like may be combined with the glass.

The coverings may be cemented onto the rollers, or else they may be'made of a slightly smaller diameter than that of the'rollers' so that the coverings have to be stretched before mounting and are held in place by the forces of resiliency.

It will be obvious that the-coverings of'my invention are highly flexible and yet "have an excellent resistance to deformation stresses. They do not travel on the rollers during use but remain thereonin the'position which they originally occupied when mounted. Due to the arrangement of glass fibrous materials in the neutral axis zone of the coverings, heat which is created at either surface cannot be conveyed to the opposite surface of the covering. It is also an important factor that glass fibers are a relatively inexpensive material so that the incorporation of such elements hardly increases the cost of the coverings while it considerably enhances their service life and quality.

' It. will: also be understood that while there have been described herein certain specific embodiments of. my invention, it is not intended thereby. tov have it J limited to or circumscribed by the specific details given in view of the fact that this invention is susceptible to various modificationsa-nd changes which come within the spiri-t-o f-this disclosure and the scope of the appended claims.

, 1- A "frubbermco er for t xtile ro s having an outer rubbertension'layer, an intermediate rubber neut al ax s'lay and an inner rubber qmpression' layer. and hav ng at least one aye of cables bedded in said neutral axis layer, said cable being constructed of glass cords each of whichiis provided with a coatin of cushinn n and bondin mat rial.

2.241 rubber. cover for. textile rollers having an outerv rubber tension layer, an intermediate rubber neutral axis layer, and an inner compression' layer, andhaving at least one layer of cables embedded in said neutral axis layer, said cables being .formed of cords which are built from short staple glass fibers the ends of some of which project beyond said cables.

3. A rubber cover for textile rollers having an outer rubber tension layer, an intermediate rubber neutral axis layer, and an inner rubber compression layer, said neutral axis layer being formed of rubber. material with a plurality ofla rs Qf la-ss fib rn ainin cabl embedded. her n. sa d, ca les in each l yer being a e in adjacent layers.

. ranged in staggered relationship with the .cables ABRAHAM L- FREEDLANDER.

BEF RE Q TE TIhe following references are of record in the file of thispatent:

* uNrrEn STATES; PATENTS Number "Name Date 1,384,806 Reed Ju1y19, 1921 2,135,057 Sla'yter et al. Nov. 1, 1938 2,184,326 Thomas Dec. 26,1939 2,369,635 "Bacon Feb. 20, 1945 2,411,027 Crosby Nov. 12,1946

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