USRE3930E - Improved roller for clothes-wringers - Google Patents

Description

parte amie.

v WOONSOOKET RUBBER COMPANY, OF WOONSOOKT, RHODE ISLAND, AS' l I SIGNEES OF JOHN F.- I-IOLT.

Letters Patent No. 49,030, dated July 25, 1865 reissue No. 3,930, datedApril 19,- 1,870.

IM-PROVED ROLLERiFOR CLOTHES-WRINGERS.

The Schedule referred to in these Letters Patent and making part of the same To all whom yit muy conce/rn Be it known that JOHN F. HOLT, of Providence, in the county of Providence and Statxe, of Rhode Island, invented a new and useful Improvement in Rollers for Clothes-Vringers, and other similar purposes, and assigned the. same to the lVoonsocket Rubber Company, a corporation chartered by the State of Rhode Island, doing business at lVoonsocket, in said county and State. The following is a full and exact description of the same, reference beinghad to the accompanying drawings making a part of this specification, in which- Figure 1 is a longitudinal view of my improved roll complete, and

Figure 2 is a sectional view of the same, which exhibits the improved mode of construction.

Similar letters of reference indicate corresponding parts in both figures.

This invention relates to a mode of securing a cylinder 'of India rubber, or a like suitable material, in a permanent and substantial manner, upon a mandrel or shaft, to form a useful and servicable roll for wringing or squeezing clothes in well-known machines for that I purpose, and for other similar uses and purposes.

The great diticulty which has hitherto been., experienced in the application of India rubber, gutta-percha, and like material, in the construction of rolls for the purpose mentioned, is that of preventing the exterior cylindrical body of India rubber, Ste., from becoming detached from and slipping on the mandrel instead of turning with it, in which case the roll is rendered permanently inoperative and useless, and, although' a great many ingenious contrivances have been employed to' overcome this difficulty, none have succeeded in doing so without rendering the roll otherwise objectionable.

. The invention for this purpose consists-- First, in constructing the mandrel `or shaft with a spiral groove in the portion occupied by the elastic cylinder of India rubber or like material. v

Second, in binding a preliminary sheet or thickness of the vulcanizable compound of India rubber or like ,material upon such mandrel by means of any suitable inelastic cord, braid, or thong, which is wound over said sheet or thickness of material inthe spiral'groove, in euch a manuel' as to conne the material in unyielding spiral corrngations upon the mandrel, to prevent its slipping thereon, and to lill the spiral groove, so as t0 present an even 'cylindrical surface for the reception and eonnement of th'e body of 'the material which constitutes the roll.

' Third, in constructing the roll for the purpose specified, by combining the spiral grooved mandrel, the mode described lof binding thereon alpreliminary thickness of India-rubber compound or vulcanizable gum, and a suitable cylindrical body of the'same material, and afterwards curing and thereby fusing the whole together on the mandrel by the process of vnlcanizing, so called, as hereinafter specified.

To enable those skilled in the art to make and use his invention, we will'proceed to describe the same.,

In the drawings- A is the mandrel, and

1l d is the spiral groove, out or otherwise formed therein, in the same manner as a screw-thread is vfmmed, except that, for this purpose, the form of the groove is best made scmicircnlar, and at the termination of the groove at each end there is made a semicircnlar score, e, directly around the mandrel, to receive the end of the binding-thong j'.

There are, also, on the mandrel, two fixed collars,

g g, near the circular score. e, between which the elastic material of the roll is held and confined, to prevent any endwise or lateral movement of the same on the mandrel.

The mandrel may be of either wood or metal, and the spiral groove and scores may be cut therein in the vusual way of cutting a screw-thread, or by casting the mandrel iu such form, whichbeing done, the elastic` which may consist of a single cord, 0r three or more strands of cotton or other twine=or cord, braided together, and this is saturated or coated with India-rubber cement, so called; or the binding-device may consist of a strip of metal, brass, copper, or iron, of a form and size t'hatwill, w` en wound upon the rubber in the groove, t and comp etely ll the same.

The thong or binding device thus formed or prepared is wound in the spiral groove 0f the mandrel, from the score e at one end tothe like score at the other end, upon the rubber compound or preliminary sheet, which is thns compressed into aspiral corrugated form,` and bound tightly in the groove, forming, as it were, a female screw ofIndia rubber corresponding with the male screw on the mandrel, and present-" i ing, by acombination of the binding-braid or thong with -a portion of the rubber compound which protrudes between the convolutions of the binding, an even and regular cylindrical surface, -to and with which a subsequent thickness or body of the rubber compound or like material would adhere and unite, if properly applied, as well to the binding'covercd with the cement, as to the rubber compound itself.

After the preliminarythickness tof material is thus bound and secured on the mandrel, the surface thus formed is wrapped with the vulcanizable comv pound of India rubber, or like gum, by winding a sheet of the same thereon until a sulicient thickness or body is obtained to lform the diameter ot' thev roll L required.

rlhe roll L is then subjected to the well-known process of vulcauizing India rubber, and klike gums, which unites the body of the compound last. put on solidly with that which is bound upon the mandrel, confining the Whole securely and permanently thereto, and rendering the. roll elasticl and fit for use.

Instead of' forming or constructing the roll L of India rubber permanently upon the mandrel, the rubber portion may be constructed in the same manner upon a temporary mandrel formed like that shown and described, -except that the semicircular scores e are omitted, so that the India-rubber cylinder L, after being vulcanized, may be unscrewed from the temporary mandrel upon which it was formed o1' made up4 as decribed, and screwed on the mandrel to which it is to be permanently confined for use on the machine, in which case one only of the collars gis xedA onl the mandrel, the other one g being removable by means of a screw-thread cut therein and on the mandrel to admit of the screwing' of the rubber cylinder.' thereon.

It will be seen that the mode described of binding a preliminary thickness of India-rubber compound i on the mandrel, formed as described, forms a. complete and perfect screw-thread within the rubber cylinder, which derives greater rmnessfrom the inelastic binding device, and is, therefore, the more substantial and eifective as a means of confining the cylinder on the mandrel than could beobtained-by any process of molding in the rubber itself, although approximate results may be obtained by so molding the rubber in connection with a mandrel, substantially like that described. l

l What we claim as the invention of said J OHN F. HOLT, and desire to secure by Letters Patent, is-

1. The spiral grooved mandrel or shaft constructed substantially as'described, for the purpose specified.

2. The binding of a preliminary sheet or thickness of vnlcanizable material on the mandrel, substantially in the manner and for the purpose described.

3. A wringing-machine roller, constructed by first binding on a shaft, by means of a cord or wire, a coverin g of India rubber or other suitable material, and afterwards vulcanizing over and onto the latter an out-er layer or coat of a Vulcanizable substance or compound.

lVOONSOGKET RUBBER COMPANY,

By LYMAN A. COOK, President. \Vitr1esses:

' F. C. SoMns,

A. M. SMITH.

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