US2096654A - Yarn feeding mechanism for twisting and doubling machines - Google Patents

Description

Oct. 19, 1937. c. c. SORENSEN 2,096,654

YARN FEEDING MECHANISM FOR TWISTING AND DOUBLINCT MACHINES Filed Aug. 26, 1956 2 Sheets-Sheet l l A l I zlv wa/rvtom: CARL CSORENSEN Patented Oct. 19, 1937 YARN FEEDING MECHANISM FOR TWIST- ING AND DOUBLING MACHINES Carl C. Sorensen, Charlotte, N. 0. Application August 26, 1936, Serial No. 97,984

4 Claims.

This invention relates to yarn feeding means for twisting and doubling machines in which an individual unit is associated with each spindle and whereby two strands can be fed to each 5 spindle at different rates of travel whereby the desired effect can be produced in the yarn.

It is therefore an object of the invention to produce mechanism associated with a, twisting and doubling machine in which two yarns, either single or combined, are fed to a spindle at different rates and whereby a yarn of less tensile strength such as fine count cotton can be twisted or doubled with a stronger yarn such as rayon, or acetate or combination thereof and thereby eliminate many of the parting of the ends which heretofore have occurred in such circumstances. This mechanism also lessens the stretch in the yarn which is fed at the faster rate; it increases the breaking strength of combination yarns, espe cially acetate and crepe combinations irrespective of the number of ends used. By using a fast feed roll and a slow feed roll to wrap one yarn around another a knitting yarn can be produced in which one strand will have more slippage over the other so as to obtain different effects in the fabric, such as cotton and acetate yarns and also combinations of rayon, acetate and silk yarns.

It is still another object of the invention to provide a pair of feed rolls for a doubling and twisting machine driven at different rates of speed. This result is obtained by using the conventional feed rolls which are now driven at the same rate of speed and around which a yarn is wound, by providing means wherebythe two feed rolls are driven at different rates of speed to feed two difierent yarns to the spindle.

It is a, further object of the invention to replace the individual feed units on present twisters with a pair of individual rollers for each spindle which have means for driving the rollers at different speeds so that two yarns can be fed at the same time to a spindle. In this case one yarn is wrapped around one feed roll several times to prevent slippage, while the other yarn is also wrapped around the other feed roll in a like manner.

The purpose of the invention is to allow a faster delivery of one yarn when two or more ends are being twisted together. For example, if an end of acetate and an end of rayon is to be twisted into one thread and a certain effect like having the acetate thrown to the front, the rayon would be wrapped around the slow feed roll and the acetate around the fast feed roll.

The speed with which the one yarn is to be thrown faster into the two ply can be controlled by interchanging the fast feed roll gear. Namely, if the yarn is to "be fed real fast a small number of tooth gear would have to be inserted and if to be fed only slightly faster a larger tooth gear would be inserted.

With this attachment if a yarn is rather difficult 'to run without taking out too much stretch it can be placed over the fast feed roll. Running in this manner it also avoids breaking so many filaments on rayon or acetate particularly and makes a cleaner thread.

In many combinations, such as alpacas and types of twistsuch as this in which rayon crepe and regular acetate is twisted together and sometimes this again plyed, it is necessary to get the best effect to feed one yarn in faster. centage of increase depends on the deniers and the number of' turns needed for the effect in the fabric needed. With this attachment one yarn can be fed 5% faster and up to the required amount to give the best balanced and weaving or processing yarn.

-This same fast feeding of one yarn can also be made-forhosiery yarns using various types of rayon, cotton, silk or mixed yarns, as before enumerated. In other words if one yarn is'desired to'be wrapped around the other or others so that more of the exterior yarn will show on the face of the fabric, the yarn desired to show would be wrapped around the fast feed roll. The amount will be determined by the effect desired; For example, if a fabric for hosiery was needed in which the silk showed on the face more pronounced than the present method of twisting, the silk would be fed in faster and at the rate determinedby efiect wanted. As before stated, this would be accomplished by changing the fast-feed roll ,gear.

Some-of the objects of the invention having been stated, other objects will appear as the-description proceeds when taken in connection with thea'c'companying drawings, in which:

Figure 1 isan elevation of one end of a doubling and twisting machine showing my invention applied thereto;

Figure 2 is a vertical sectional view taken along the line 2-2 in Figure 1;

Figure 3 is a vertical sectional view taken along line 33 in Figure 1;

FigureA isan enlarged detail sectional view tjaken along line 44 in Figure 1 showing the invention;

Figure 5 isa sectional view looking at the The peropposite side of Figure 4, with the housing cover removed;

Figure 6 is a sectional plan view taken along line 6-% in Figure 4;

Figure 7 is an enlarged sectional plan View taken along line 5-1 in Figure 4;

Figure 8 is an enlarged view of a pair of strands twisted in accordance with the invention.

Referring more specifically to the drawings, the numeral I9 denotes an end frame of a doubling and twisting machine which has secured to the bottom portion thereof longitudinally disposed struts and I2. A longitudinally disposed strut I3 is also secured to the upper portion. These struts have their other end secured to another end frame not shown, similar .to end frame IE! to form a complete framework for ho1d-" ing the apparatus. Secured to endframe I is a bracket l i upon which is mounted a motor l5, said motor being connected by means'of a suitable coupling Hi to shaft The shaft I! has a sprocket 8 fixedly secured thereon which sprocket drives a sprocket chain l9. Sprocket chain I9 is also mounted on another sprocket 20 which, in turn, is fixedly secured upon shaft 2|.

The shaft I"! has a gear 25 keyed thereon which is adapted to constantly rotate pinions.

26 and 27 which pinions are fixedly secured upon shafts 28 and 29 respectively. The shafts 28 and 29 extend longitudinally of the machine and have located thereon at spaced intervals suitable gears 30, which gears mesh with gears 3| mounted on spindle shafts 32. A spool 33 is placed upon the upper portion of spindle shaft i 32 for receiving the yarn after it has been twisted.

A suitablering rail 34 encircles the spool 33 and is adapted to be oscillated up and down to traverse the length of the spool to cause the yarn which has been twisted to be wrapped therearound. The yarn which is wrapped around the spool 33 is twisted immediately before being wrapped thereon and the twisted strand will be designated by the reference character 35. This strand comprises a pair of strands such as 31 and 38 said strandsbeing drawn downwardly from spools or cones 39 and 4|! respectively, through a suitable tension device 4| and thence downwardly through the feeding device 42 which is the present invention. g

The parts designated by the reference characters ill to 4| inclusive are conventional but it is deemed necessaryrto show this much of the old structure to more clearly disclose the present invention.

The feeding device 42 is fixedly secured to vertically disposed shaft 45, which shaft has its upper end slidably mounted-inbracket 46. The lower end of, shaft 45 is pinned to a horizontally disposed link 59 which link has its other end pinned to the upper end of vertically disposed shaft This shaft 5| extends downwardly and has its lower end slidably mounted in longitudinally disposed strut H or l2 and its upper end is slidably mounted in housings 52, which housings normally contain an'oil or a suitable lubricant for the gears therein. The rod 5| has secured to the lowermost end a footjpedal or projection 53 which is adapted to be engaged by the operators foot when it'is desired to throw the feeding apparatus ingear. A compression spring 5-5 is confinedaround the rod 52 by means of a collar 55 and also by means of struts H or |2 to normally force the parts into a disengaged position; however, after it has been once. placed into an engaged position, by. exerting pressure upon foot pedal 53, the parts will remain in engaged position until certain mechanisms are operated to throw the parts out of gear. These parts are conventional, and a description of the same is therefore not deemed necessary.

The shaft 2| also has fixedly secured thereon a pinion 60, which pinion meshes with an idler pinion 6|. The pinion 6| also meshes with another pinion 62 which is fixedly secured on one end of a short shaft 63, said shaft 63 being mounted in bracket 64. The'other end of shaft 63 has secured thereon a gear 65 which meshes with pinion 66 mounted upon longitudinally disposed shaft 51. (Figs. 1, 2 and 3.)

By means of idler gears 68 and 69 another pinion is driven by pinion 66 and this pinion 10 is fixedly secured upon longitudinally disposed shaft II which is similar in all respects to shaft 61 and performs the same function.

which are constantly rotated and are adapted to mesh with gears 16 of the feeding attachment 42. The gear 16 is pinned on one end of a shaft 11 which shaft is rotatably mounted in a suitable bushing 18. This bushing is secured in hub portion 19 of housing 89'. Secured to the other end of shaft 11 by any suitable means such as a pressed fit is a feed roller 82 around which strand 31 is wound. The, strand 3'! is also wound around apin 83 which extends outwardly in parallel relation to the shaft 11. By wrapping strand 3'! around both of the members 82 and 83 the proper amount of tension is produced in the strand and it enables one to vary the speed at which the strand is fed.

Loosely mounted around the hub of pinion I6 is a'plate 86, which plate has rotatably mounted therein as at 81 an idler pinion 88. This idler pinion is adapted to also mesh with another pinion 89 which is secured on shaft 9|]. The pinion 89 isremovably secured to the shaft 99 since it has va slot 9| in the hub thereof which is penetrated by a suitable pin92, said pin also being fixedly secured in shaft 90. washer 94 and a screw 95 normally hold thepinion 89 on the shaft 99 in such a manner that the pin 92 will penetrate theslot 9| in the hub of pinion' 89. Shaft 90 is rotatably mounted in a suitable bushing 9! which bushing is also secured in hub portion 98 of housing 80. Fixedly secured on ,the other end of shaft 99 by any suitable means such as a pressed fit is another feed roller 99 aroundwhich the strand 38 is wound. The. strand 38 is also wound around a suitable pin separator I99 which extends outwardly in parallel relation to the shaft 99. The number of turns: which are made around the'roll 99 and'separator I00 will determine the amount also play in important part in the speed of the strand 38 as.it is being fed downwardly from the spool 40 to be twisted with strand 31. v

In Figures 4 and 5, it will be noted that, pinion 89 is smaller than pinion T6,;hence the pinion .89 will be driven at a higher rate of speed than the pinion 16. Likewise, the roller 99 will be driven at a higher rate of rotation than the roller 92; consequently, the strand 38 will be fed downwardly faster than the strand 3!. The strand 38 is usuallymade of some suitablematerial such as acetate, cotton, rayon, silk or anyccombination thereof and is fed so fastrelative to strand 3! that the strand. 38 is not stretched as much as strand :31, thereby throwing the greater tension (Fig. 7) A.

upon the strand 31. The strand 3! usually has greater strength than strand 38; consequently, strand 3'! is fed around the slow feed roll 82, whereas, the strand 38 usually has less strength hence, it is fed from around the fast feed roll 99 so that the strand 38 will be virtually wrapped around strand 31. By providing a construction of this type it is possible to have a combination strand, which, when the tension is applied to the finished strand, the elastic strand 38 will break approximately at the same time that the less elastic strand 3'! will break, hence a maximum tensile strength from the combined strands of twisted yarn is obtained. Heretofore, these strands have been fed through and doubled at the same speed on silk twisters or doublers; consequently, due to the elastic limit of both of the strands 31 and 38 being different, one of the strands would be broken before the maximum strength of the other strand has been reached, therefore, the maximum tensile strength of the combined strand would not be obtained.

In order to vary the speed of the feed roll 99 the pinion 89 has been made removable as heretofore stated. If it is desired to increase the speed of shaft 90 and the feed roll 99, the pinion 89 will be removed and a smaller pinion will be placed thereon. Since the idler pinion 88 is rotatably secured to plate 85, this pinion can be radially adjusted about the shaft 11 so that it will mesh with both pinions l6 and 89 regardless of what size pinion 89 might be. When it has been adjusted to the proper position, a set screw I02 is screwed home into housing St to fixedly hold the plate 86 in its proper position. This set screw normally penetrates a radially disposed slot I03 cut in this plate. A cover HM is secured to the housing by any suitable means such as screw I to normally close one side of the housing.

In the drawings and specification there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only, and not for purposes of limitation, the scope of the invention being set forth in the appended claims.

I claim:

1. In a twisting machine having a plurality of spindles, a feeding unit for each spindle comprising a pair of feed rolls, common means for driving all of the rolls of said units, one of said rolls having a geared connection with said common driving means, a geared connection between one.

roller and the other roller, said geared connection having an interchangeable gear therein so that the rate of rotation of one roll can be varied with relation to the other roll.

2. In a twisting machine having a plurality of spindles, a pair of feed rolls for each spindle around each of which a strand of yarn may be wound to feed the strands to the spindle, means for driving the rolls at different rates of speed to feed the yarn on one roller to the spindle at a faster rate than the yarn on the other roller is fed to the spindle, and means for changing the relative rate of rotation of the two rolls. 7

3. In a twisting machine having a plurality of spindles onto which the twisted strand is Wound,

an individual feed unit for each spindle, each individual unit comprising'a plurality of feed rolls and each roll being adapted to have wound there- 'around a strand for feeding the same to the spindle, and means for driving the feed rolls in a unit at different rates of speed to thereby feed

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