US2239601A - Novelty yarn and method of producing it - Google Patents

Description

April 22, 1941.

A. A. FORSTER NOVELTY YARN AND METHOD OF PRODUCING IT Fired May :5, 1940 2 Sheets-Sheet 1 WITNESSES: @flflhm) INVENTOR;

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April 22, 1941- A. A. FORESTER 2,239,501

NOVELTY YARN AND METHOD OF PRODUCING IT Filed lay 3, 1940 2 Sheds-Sheet 2 WITNESSES.- m gag/Tog.-

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Patented Apr. 22, 1941 NOVELTY YARN AND METHOD or raonucmo rr Alfred A. Forster, Drexel Hill, Pm, asllgnor to Clifton Yarn Mills, Clifton Heights, Pa a corporation of Pennsylvania Application May a, 1940, Serial No. 333,084

Clalms.

This invention relates to novelty yarns such as are used to create fancy effects (as distinguished from definite design patterns) in fabrics woven or knitted from them, and also to methods of producing such yarns.

The chief aim of my invention is to make it possible to predetermine varigated irregular striped effects and the like in fabrics more especially intended for use as dress materials or draping. This objective I realize in practice, as hereinafter more fully disclosed, through provision of a compounded novelty yarn in which a plurality of cover or sheathing threads are wrapped about spaced sections of a colored or otherwise contrasting core thread, with said sheathing threads intertwisted in the intervening intervals.

Another aim of my invention is to make it possible to expeditiously and cheaply produce in quantity, novelty yarn characterized as above. This desideratum I realize as also more fully set forth hereinafter, through provision of a simple method which can be practiced with the aid of ordinary types of twisting machines.

Other objects and attendant advantages will appear from the following detailed description of the attached drawings, wherein Fig. 1 shows a fragment of my improved novelty yarn on an enlarged scale.

Fig. 2 is a similar view on a still larger scale showing a fragment of the core thread.

Fig. 3 shows the partially completed thread with one of the sheathing or cover threads wrapped about the core thread.

Fig. 4 is a view like Fig. 1 of the completed thread drawn to a scale corresponding to that of Figs. 2 and 3.

Figs. 5 and 6 are diagrammatic views in vertical section of two twisting machines suitably organized to carry out the method for commercially producing the yarn.

As delineated in Fig. 1 and on a larger scale in Fig. 4, my improved novelty yarn Y comprises two cover threads l0 and II which form a sheath around section 12a of a base or core thread [2 separated by substantial skip intervals I3 which are where the aforesaid cover threads are intertwisted. For convenience of exemplification, the cover strand H] (which, for convenience I term the effect thread), may be composed of two doubled ends of 50/ 1 bright white spun rayon, the second sheathing strand H of a fine end of 50 Den. bright white rayon, and the core thread I2 of colored 100 Den. Union resist acetate thread. After its formation in a manner presently described, the yarn may be dyed in any desired color (other than that of the core), the dye selected being such as will not affect the original color of the core sections IZa. Thus, in the finished exemplified yarn the sheathing threads l0 and II will contrast with the core sections l2a. It is to be understood, however, that threads of other sizesand materials may be employed, depending upon the effect desired in the finished product. Thus, by way of further illustration, the sheathing threads Ill and Il, may be of altogether different materials such as real silk and cotton which will be afiected to different extents by the dye employed and therefore be of correspondly different shades of the same color in the finished yarn. Still other effects may be had by utilizing more than two sheathing yarns either of the same or different materials. As a further variation, the cover threads may be wrapped in opposite directions instead of in the same direc,

tion as shown herein by way of illustration.

The yarn may be conveniently formed in two operations which are respectively illustrated in Figs. 3 and 4. In the first operation, the sheathing thread It) is wrapped about the core thread l2 (of which a fragment is shown in Fig. 2) after the manner illustrated in Fig. 3. In the second step, the other sheathing thread II is Wound about the partially completed yarn Y of Fig. 3,

and tension is applied at the same time, so that the more fragile core thread I! is strained and broken at intervals after the manner shown in Fig. 4.

The two steps or stages of the method just described can be conveniently carried out with the aid of two twisting machines such as diagrammatically illustrated in Figs. 5 and 6. The machine shown in Fig. 5 has two sets of pinch rollers l5, l6 and II, III by which the core thread l2 and sheath thread Ill are drawn from separate sources of supply indicated at I!) and 20 respectively, and a revolving spool or spindle 2| which receives the partially completed thread Y. By means of connecting gearing conventionally indicated by the broken link circles 22, 23 and 24, the rolls [1, I8 are driven at a somewhat faster rate than the rolls l5 and It with the result that the core thread I2 is maintained taut and the sheathing thread l0 wrapped about it by the rotation of the spool 2| as the two threads pass the twisting point at 25. In the second step or phase of the operation, the spool 2| of the partially completed yarn Y is mounted, together twisting machine, like that of Fig. has two sets of pinch rolls 21, 28 and 29, 88 which act respectively upon the thread and the partially completed yarn Y. By means oi the intermeshing spur gears conventionally indicated at ll, 32 and 33, the rolls 29, 38 are driven at a somewhat faster rate than the rolls 21, 28. As a result the partially completed thread Y is stretched up to the breaking point of the core yarn 12 in the interval between the pinch rolls 21, 28 and 29, 38. The stretching takes place between the eye 34 and the pinch point 31 oi. the rolls 21, 28, while the repeating rupture of the more fragile core thread l2 occurs between said eye 34 and the pinch point 38 of the rolls 29, 38. The sheathing thread H meets with the thread Y at the eye 84 and is doubled with the latter thread at the pinch point 38 of the rolls 29 and 30, the doubling twist being induced by rotation of the collecting spool 85.

The above described apparatus is of course to be considered merely as representative of other means by which my improved novelty yarn may be produced in quantity for commercial purposes.

Having thus described my invention, I claim:

1. Novelty yarn in which a plurality of cover or sheathing threads surround spaced sections of a core thread, and in which the cover or sheathing threads are intertwisted in the intervals intervening the corethread sections.

2. Novelty yarn according to claim 1, in which the core and the cover or sheathing threads are 01' different colors.

3. Novelty yarn according to claim 1, in which the core and the cover or sheathing yarns are of different materials.

4. The method of producing novelty yarn with alternate thick and thin segments which comprises wrapping a plurality of non-elastic cover or sheathing threads about a relatively fragile non-elastic core thread, and incldently straining the core thread to cause it to rupture periodically, and to cause elongation of the intervening twists of the sheathing threads.

5. The method 01' producing novelty yarn with alternate thick and thin segments which comprises wrapping a non-elastic cover or sheathing thread about a relatively fragile non-elastic core v thread to form the partially completed yarn, and

then wrapping another non-elastic sheathing or cover thread about thepartially completed yarn and incldently straining the core thread to cause it to rupture periodically, and to cause elongation of the intervening twists of the sheathing threads.

FOR/S'I'ER.

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