US3811259A

US3811259A - Guide means for two for one twisting device

Info

Publication number: US3811259A
Application number: US00154978A
Authority: US
Inventors: P Petersen
Original assignee: Individual
Current assignee: Individual
Priority date: 1971-06-21
Filing date: 1971-06-21
Publication date: 1974-05-21
Anticipated expiration: 1991-05-21

Abstract

An improved two for one yarn twisting machine having a guide means rotatably mounted between the yarn package and the take-up means. The guide means has a pin or pins and a roller or rollers around which the yarn is looped and is rotated in the same direction and at the same speed as the twister balloon to control friction in the yarn linear movement, consequently decreasing yarn tension and enabling the use of higher linear speeds.

Description

Brockel 57/5859 United States Patent 1 1 1 3,811,259 Petersen 1 May 21, 1974 GUIDE MEANS FOR TWO FOR ONE 3.330.104 7/1967 Dunwoody. Jr .1 57/773 x TWISTING DEVICE 3,475,895 11/1969 Raschle 57/77.3 3,574,273 4/1971 Hilbert 57/773 [76] Inventor: Philip R. Petersen, 1427 Hartford FOREGN PATENTS OR APPLICATI NS Ave., Charlotte, NC. 28029 Q 1,045,746 10/1966 Great Britain ..'-57/58.59 1 Flledr J 1971 1.440.294 4/1966 France... 57/5859 21 A 1. N 154,978 1 pp 0 Primary Examiner-John Petrakes [52] 1.1.8. C1. 57/58-83, 57/5859 57 ABSTRACT [51] Int. Cl. D0lh 1/10 An im roved two for one y twisting machine [58] Field of Search 57/5849, 58.59, 58.57, p l d b h 57/5883 5886 5852 77.3 7737 mg a guide means rotatab y mounte etween e yarn package and the take-up means. The guide means has a pin or pins and a roller or rollers around [56] References cued which the yarnis looped and is rotated in the same di- UMTED STATES PATENTS rection and at the same speed as the twister balloon to 2,143,203 1/1939 Maxham.... 57/5859 onn-o] friction in the yarn linear movement c nsegegg gg 132% 3 3 5 quently decreasing yarn tension and enabling the use ac 1e.... I 3.106.816 10/1963 Mackie 57/5852 of hlghe' lmear r 3.377.790 4/1968 6 Claims, 4 Drawing Figures PATENIED m 2 1 1914 3311.259 sum 1 or 3 Fla. 1

INVENTOR PHILIP R. PETERSEN PATENTEDIAYZI'IQH sum 2 OF 3 I. I i a J iuvsurok PHILIP R. PETERSEN r ATTORNEYS W JM /M PATENTEDIAYZI m4 3.811.259

SHEET 3 BF 3 fl f;

FIG. 3

INVENTOR PHILIP R. PETERSEN ZJQQQQWMWM ATTORNEYS .1 GUIDE MEANS FOR TWO FOR ONE TWISTING DEVICE This invention relates to a yarn twisting machine and more particularly to a two for one twister capable of high speed operation consistent with yarn of high quality and free of breakage. It includes an improvement in the guide means positioned between the twisting device and a take-up reel in such a machine. In a two for one twisting machine, two turns or twists are imparted to the yarn for each revolution. To control the yarn balloon and twisting, the yarn is usually passed through a fixed eyelet or over a fixed pin or roller which is positioned between the twister and the take-up means. This leads to tension in the yarn since the eyelet, roller or pin creates friction opposing the yarn travel. The minimization of such friction is highly desirable along with the minimization of tension which can lead to breaking of the yarn, especially delicate yarns.

It is therefore an object of this invention to provide an improvement in a two for one twisting machine whereby yarn tention can be greatly decreased so as to minimize the amount of yarn breakage, particularly of delicate yarns when operating at high speed.

It is further object of this invention to minimize friction along the linear travel of the yarn so as to facilitate maximum yarn linear speed of movement.

Further objects and advantages will become apparent from the following specification taken in connection with the drawings which form a part of this application and which are given for. purposes of illustration only and not of limitation, in which:

FIG. 1 is a side view ofa twisting machine employing the improvement of this invention;

FIG. 2 is a sectional view taken along line 22 of FIG. 1;

FIG. 3 is a sectional view similar to FIG. 2 but utilizing pins instead of a roller; and

FIG. 4 is a top view of the guide of FIG. 3.

Turning now to the drawings in greater detail, the twisting device has a yarn package 12 in a stationary position within a container 14. Co-axially located within the container is a twister tube located below its extension 16 which is rotatably mounted to be driven by a belt 19 through a pulley 20. The pulley is preferably grooved and the belt has complementary cogs so that a fixed speed can be maintained without any slip or drift in relation to the driving motor. The belt is

trainedaround pulleys

22 and 24 and is driven by a motor. The return run of the belt is on the opposite side of the machine (not shown) and follows a path similar to that shown.

The yarn 28 is brought up from the package 12, through an optional flyer 30 and is then threaded through the center of the twister tube 16 extension and out through a radial opening in disc 32 where it is brought up inside a balloon control shield 34. A loop or ballon is formed in the yarn by the centrifugal force of the twister as the yarn moves off the package and upwardly. At 36 is a conventional take-up means such as reel with a traversing device for laying up smooth layers on that reel.

The preceding two paragraphs describe a device which is well known in the prior art and is described here only for purposes of complete illustration. The improvement of this invention will now be discussed in detail.

Located between the take-up means 36 and the package 12 is the guide assembly 38 of this invention. This guide, of suitably hard material in order to resist wear by the rapidly travelling yam 28 moving lengthwise through it, is mounted for free rotation in support 46 by means of low friction bearings 44 which may be ball, needle, or roller or other suitable types (see FIG. 2). The guide is driven by belt 18 through a pulley which preferably has grooves which mate with cogs on the belt so as to provide a positive, non-slip, non-drift drive. The belt is trained around

pulleys

48 and 50 and is driven by any suitable means so that exact control of the speed of both the tube 16 and the guide 42 can be assured. Thus,

pulleys

40 and 20 and their drive means would be such that the guide 42 would turn at the same speed as the twister. They, of course, turn in the same direction. Belts l8 and 19 could be driven from a common motor having a vertically extending shaft parallel to

pulleys

20 and 40.

As the yarn moves lengthwise along its path of travel between the package 12 and the take-up means 36, the yarn itself is also moving in a'wide sweeping loop or ballonwhich will tend to frictionally engage any surface with which it comes in contact. Through rotation of the guide 42 and its flared end 43 in the same direction as the twister tube 16, any wiping action of the yarn against the interior of the flared end 43 is virtually eliminated. .To facilitate high speed yarn movement, all edges of the guide 42 and flared end 43 are smoothly rounded in order to eliminate any sharp bends.

The amount of flare or funnel shape'in the end 43 is, of course, dictated by the spacing between the guide and the package below. At the upper outlet rounding of edge 56 is dictated by the spacing between the guide and the take-up mechanism above. The important point is that the guide is rotating in a direction and speed which corresponds to the rotational direction of v the balloon as it travels around the package after having been twisted. The speed of rotation of the guide should be the same speed as that of the twister.

In the prior art various forms of fixed eyelets, pins, or idler rollers were positioned betweenthe take-up and the package to control the balloon or to provide an upper fixed point, below which the twisting would take place. These types of guides acted as friction points and created unnecessary tension, thus limiting the linear yarn speed to a rate which would not be damaging to the yarn. In the present apparatus not only is roller 58 freely rotatable about axis 60 but axis 60 is also rotated in its own plane, that is rotated with the guide. This eliminates unnecessary tension in the balloon thus enabling very high speeds to be reached as the yarn moves through.

In the present invention, smoothly curved idler means are carried by the rotate with the guide 42. This idler means can be a single roller as depicted in FIG. 2 or a plurality of rollers. It can also be one or

more pins

62 and 64 positioned in the guide as shown in FIGS. 3 and 4. The idler means can be located in the lower part of the guide as shown in FIG. 2 or farther up in the tube as in pin 62. The important point is that the idler means furnishes a smoothly curved surface over which the yarn passes and that surface is rotating at the same speed and in the same direction as the yarn balloon- Thus the idler means and the guide do not resist the linear yarn travel but move in syncronism with it and keep a proper balloon.

.and to the left of an upper pin 62. These pins are offset in opposite directions from the central axis of the guide, pin 62 being to the left and pin 64 to the right center. The guide has a smoothly rounded inlet and outlet 56 to insure free yarn travel. The pulley 40 is the same as that shown in FIG. 2 and it is to be understood that the guide in FIG. 3 is mounted in suitable bearings and holders such as depicted in FIG. 2. and would be mounted and driven in the same manner as shown in FIGS. 1 and 2. Since the yarn is confined to a particular portion of the guide interior by each of the pins, it will be rotated along with the guide and, as previously discussed, that rotation is at the same speed and direction as the yarn balloon. A single pin or a group of pins could, of course, be used as well as the pair of pins illustrated. The pin or pins could be located anywhere in of the balloon and hence reducing twisting tension. The

size of the balloon is in direct relationship to these tensions. If the balloon is positively driven ,at the same speed as'the twister, these tensions will be eliminated. Thus, the method of the present invention involves reducing the twisting tension of a yarn in'a two for one twister by eliminating tension between the yarn package and the take-up means. By positively driving the guide in the same direction and at the same speed as the two for one twister, the yarn tension within. the balloon is substantially reduced, principally because both ends of the ballon are being driven at constant and controlled speeds thus resulting in absorbing or transferring yarn balloon inertia from the balloon into the driven guide. It is thus important that the twister and the guide be driven at the same speed, allowingno lack of control which could cause drift or slippage which would result ina corresponding increasein tension in the balloon; i Y

What is claimed is:

1. In a two for one strand twisting machine having a stationary yarn package,ta single rotatable twister tube located co-axially'within said package, a rotatable disc below said package andtake-up means above said package for drawing yarn therefrom and forming a free balloon in the yarn between the disc and the take-up means, the improvement comprising means between the balloon and take-up means to reduce friction on the yarn having:

a. a rotatable guide means for the yarn to pass through positioned between the free balloon and the take-up means, the guide having smoothly curved idler means to contact and rotate the yarn;

b. means to drive the twister tube and the guide means in the same direction and at the same speed.

2. The device of claim 1 in which the idler means is a roller mounted for free rotation on an axis substantially perpendicular to the axis of said guide means.

3. The device of claim 1 in which the idler means is at least one pin with its axis substantially perpendicular to the axis of the guide means.

4. The device of claim 1 in which the guide means has a flared lower end holding the idler means.

5. A method for twisting a yarn comprising: a. removing said yarn from a stationary package by passing 'it downwardly through tthe center of the package to a twister which swings a free balloon of yarn around said package to induce a twist therein;

b. moving said yarn lengthwise as it is removed from the package and winding it onto a take-up reel;

c. passing the yarn over an idler means mounted on a rotatable guide means positioned between said free balloon and said take-up reel;

d. rotating the guide in the same direction and speed as the twister so that both ends of the balloon are rotated at the same speed so as to decrease tension in the balloon by eliminating friction opposing said lengthwise yarn movement.

6. A yarn friction reducing balloon control device for a two for one twister having a stationary yarn package, a single rotatable twister tube located co-axially within the package, a rotatable disc below the package and take-up means above the package forming a free balloon in the yarn between the disc and the take-up means comprising an elongated guide tube positioned between the free balloon and the take-up means for the yarn to pass through, said guide'tube having smoothly curved idler means mounted in a plane substantially perpendicular to the longitudinal axis of the guide means, said plane rotating with the guide means, said guidetube acting to contact the yarn and guide it without introducing friction-or interfering with the yarn linear travel therethrough and means to-drive said guide tube and twister tube in the same direction and at the same speed.

Claims

1. In a two for one strand twisting machine having a stationary yarn package, a single rotatable twister tube located co-axially within said package, a rotatable disc below said package and take-up means above said package for drawing yarn therefrom and forming a free balloon in the yarn between the disc and the takeup means, the improvement comprising means between the balloon and take-up means to reduce friction on the yarn having: a. a rotatable guide means for the yarn to pass through positioned between the free balloon and the take-up means, the guide having smoothly curved idler means to contact and rotate the yarn; b. means to drive the twister tube and the guide means in the same direction and at the same speed.

5. A method for twisting a yarn comprising: a. removing said yarn from a stationary package by passing it downwardly through the center of the package to a twister which swings a free balloon of yarn around said package to induce a twist therein; b. moving said yarn lengthwise as it is removed from the paCkage and winding it onto a take-up reel; c. passing the yarn over an idler means mounted on a rotatable guide means positioned between said free balloon and said take-up reel; d. rotating the guide in the same direction and speed as the twister so that both ends of the balloon are rotated at the same speed so as to decrease tension in the balloon by eliminating friction opposing said lengthwise yarn movement.

6. A yarn friction reducing balloon control device for a two for one twister having a stationary yarn package, a single rotatable twister tube located co-axially within the package, a rotatable disc below the package and take-up means above the package forming a free balloon in the yarn between the disc and the take-up means comprising an elongated guide tube positioned between the free balloon and the take-up means for the yarn to pass through, said guide tube having smoothly curved idler means mounted in a plane substantially perpendicular to the longitudinal axis of the guide means, said plane rotating with the guide means, said guide tube acting to contact the yarn and guide it without introducing friction or interfering with the yarn linear travel therethrough and means to drive said guide tube and twister tube in the same direction and at the same speed.