US1602308A - Process of spinning, drawing, and doubling yarn - Google Patents

Description

- H. MALY- PROCESS OF srmume, DRAWING, AND DOUBLING YARN m W e e &

. n 6 xanfiz j Oct. 5 1926.

MALY PROCESS OF SPINNING, DRAWING, AND nouanme'unn Filed 'July' 29, 1925 I j /l/I/I/l/I///////////////////////I/IlI/W/fi! Patented Oct. 5, 1926. Y

HERMANN MALY, OF GUBEN, GERMANY.

PROCESS OF SPINNING,-DRAWING, AND DOUIBLING YARN.

Application filed July 29, 1925, Serial No. 46,916,

A usual practice in spinning yarn is to draw the rovings in a. two-roller mule, and impart greater attenuation in a three-roller mule.

The object of my invention is to improve the uniformity, strength and fineness of the yarn and to insure that the twist is mainly at the circumferential part thereof; also to prevent back-twist, and secure greater tensile strength and stretchability.

In dealing with unspun rovings I attain these objects by disposing between the delivery rollers and the spindle, nearer to, the former than to the latter, a brake or resistance over which the fibre travels. Between this brake and the spindle the yarn is fully spun, and this longer portion of the yarn draws fibre from the loose bunch behind the brake, somewhat as occurred with the old distafi' and spindle. The brake effect is preferably made regulatable, so that the transmission of twist from the spun yarn to the loose fibre behind the brake can be regulated as required. v

For doubling, the single yarns travel separately to the brake. The twist given for doubling is in the opposite direction to the twist of the fibres, so that there is some untwisting of the yarn, which allows of stretching.

The invention is illustrated in the annexed drawings, which show various examples, Figs. 1 to 3 relating to spinning, and Figs. 4 to 7 to doubling.

As shown in Fig. 1 the delivery rollers a, a deliver loosely spun yarn b, which at 0 passes over a brake d, and thence to the spindle 6. Owing to the provision of the brake, by'far the greater part of the twist imparted by the spindle is confined to that part ofthe yarn which is between the spindle and the brake. Between the spindle and brake there is little or no stretch, and the spun yarn draws out fibre in proportion as the speed of the carriage exceeds the rate of delivery of the rollers.

The brake may be made vertically adjustable, for regulating its effect, or a larger or smaller brake may be substituted for the same purpose; these two regulating methods may be used in conjunction. Fig. 1 shows a flat-topped brake across which the fibre runs from c to 0 I may also regulate the brake effect by vertically adjusting the rollers, leaving the brake stationary.

and in Germany August 1, 1924.

For spinning and drawing yarn already partly spun the process is similar to. that used for spinning from rovings, but thespindle e is rotated in the opposite direction to the twist of the partly spun yarn, with such excess of speed that the .part b leaving the rollers is untwisted.

For drawing and spinning with a threeroller mule, is substantially the same, but-about half the drawing is preferably left to -",drawing rollers, the remaining half being effected by the combined spinning and drawing operation described. I

With the apparatus shown in Fig. 5 for doubling, the brake cl isfs o regulated, according to the yarn dealt;. =with, that the untwisting effect due to rotatingthe spindle in the opposite direction to the twist of the yarn does not proceed beyond the point 0,

or only doesso to a p i;determined, limited extent. The region of-more or less loose fibre is in this-case between 0 and 0 The yarns between 0 and I) retain their original twist, and are not drawn. The yarn is doubled at 0 or close to this point. There may be more than two yarns. By this method thread of goodor fair strength may be obtained by doubling yarns where the doubling and the twist of the yarns are in the same direction, or where the doubled yarns are of opposite twist, though with other methods such yarns are not at all strong.

The doubled yarn is in fact of a novel kind. The doubling is permanent and independent of the direction of twist by which it is done, and of the twist of the separate yarns. Irregularities of thickness of the separate yarns, such as shown at h in Fig. 4, are entirely eliminated in the doubled yarn, whereas with other methods they cause inequalities such as shown at g in Fig. 4.

Apart from the more thorough preparation of the rovings for the three-roller system, as compared withthe two roller system, the spinning operations whereby the yarns are formed are different with these two systems, as heretofore practised, but with my method yarns produced by the tworoller and three-roller systems are technically yarns of the same kind. (lifi'erent'only as regards the degree to which the fibres were prepared for spinning.

The distance between the rollers and as shown in Fig. 3, the methodbrake is made longer or shorter, according to the length of the fibres.

I have described he process with reference to mules, where'the carriage with the spindles is reciprocated, but I may employ it with system in which the spindles are stav tionary and the yarn feeders are on a carriage. c WVhat I claimis:

1. The methodof spinning textile fibers, consisting in subjecting the fibers to a restraining influence adjacent the drawing rollers intermediate the latter and a mule spindle whereby the twist due to the rotation of the spindle is imposed preponderantly on the length of fiber intermediate the point of application of said restraining influence and the spindle, the length of spun yarn drawing fiber from behind the point of application of said restraining influence.

2. The method of spinning textile fibers, consisting in subjecting the fibers to a re- 1 straining influence adjacent the drawing rollers intermediate the latter and a mule mission of twist from the spun yarn and the fiber behind the point of application of said restraining influence.

3. The method of doubling yarn fibers,

consisting in subjecting the yarn to a restraining influence adjacent the drawing or delivery rollers intermediate the latter and a mule spindle, and rotating the spindle in the opposite direction to the twist of the yarn fibers whereby the separate yarns are untwi'sted between the rollers and the point of application of the restraininginfluence.

4c. The method of doubling yarn fibers, consisting in subjecting the yarn to a restraining influence adjaccnt the drawing or delivery rollers intermediate the latter and a mule spindle, and rotating the spindle in the oppositevdirection to the twist of the yarn fibers whereby the separate yarns are untwisted between the rollers and the point of application of the restraining influence, and adjusting the resistance of said restraining influence for controlling the longitudinal extent of the untwisting action.

The method of doubling yarn fibers,

consisting in passing the separate yarns singly through drawing or delivery rollers, sub ecting the fibers to a restraining 1nfiuence subsequent to the1r passage through the rollers, and' 'winding the yarn on a spindle rotating in the opposite direction to the twist of the fibers, whereby the separate yarns are untwisted between the rollers and the point of application of the restraining influence and united substantially at said point.

In testimony whereof the foregoing specification is signed.

HERMANN MALY.

Images