US3908917A

US3908917A - Deflecting mechanism for controlling thread being wound onto a spool core

Info

Publication number: US3908917A
Application number: US413738A
Authority: US
Inventors: Alfred Tschentscher
Original assignee: FMN Schuster GmbH and Co KG
Current assignee: FMN Schuster GmbH and Co KG
Priority date: 1972-11-09
Filing date: 1973-11-07
Publication date: 1975-09-30
Anticipated expiration: 1992-09-30

Abstract

The apparatus forms a reserve winding during the initial winding of a thread onto a spool core. A supply of thread is delivered to a spool core and a traversing device is used to direct the supply of thread along the spool core to form a thread package. A deflecting mechanism is located between the delivery mechanism for the supply of thread and the traversing device to provide a short duration of deflection in the thread at a spaced location away from the spool core when the end of the thread is secured to the spool core. Various embodiments of the deflecting mechanism are disclosed to effect precise winding conditions at the beginning of the winding process.

Description

United States Patent Tsehentseher 1 1 Sept. 30, 1975 [54] DEFLECTING MECHANISM FOR 3.282516 11/1966 Porter 242/18 PW CONTROLLING THREAD BEING WOUND 3,408,011 10/1968 Lenk et 111... 242/13 PW 174L488 6/1973 Wuest 242/18 PW ONTO A SPOOL CORE 1792818 2/1974 Bauer ct a1. 242/18 PW [75] Inventor: Alfred Tschentscher, Cologne, 3.814338 6/1 74 pp rsm 2/18 PW V Gcnnany 3,819,123 6/1974 LUZ 242/18 PW [73 Assignec; FMN schuster & C0" FOREIGN PATENTS OR APPLICATIONS Hurth-Efferen, Germany 824.524 10/1969 Canada 242/18 PW [22] Fllcd' 1973 Primary Exun1inerStan1ey N. Gilreath [2]] Appl. No.: 413,738 Atlorney, Agent, or Firm-Neil F. Markva [30] Foreign Application Priority Data [571 ABSTRACT 1972 Germany 3354736 The apparatus forms a reserve winding during the ini- June 18 1973 Germany 233006 tial winding of a thread onto a spool core A supply of OCL X l [973 Germany 2351039 thread is delivered to a spool core and a traversing device is used to direct the supply of thread along the 1521 U5. c1. 242/18 1 w spool Com m form a thread P A dsflwing [51 l B65 54/34 mechanism is located between the delivery mechanism [58] Field of Search 242/18 W 18 DD, l8 R, for the supply of thread and the traversing device to 242/18 EW, 19, 147 A, 355 R, R provide a short duration of deflection in the thread at a spaced location away from the spool core when the [56] References Cited end of the thread is secured to the spool core. Various UNITED STATES PATENTS embodiments of the deflecting mechanism are disclosed to effect precise winding condltions at the be- 2.741 443 4/1956 Klein 242/147 A ginning of the winding prom 3,166.262 1/1965 Vanneman, Sr. 242/18 PW 3.281.088 10/1966 Matsui et al. 242 3511 R 17 Claims, 18 Drawing Figures l. i l

US. Patent Sept. 30,1975 Sheet 1 of7 3,908,917

U.S. Pateflt Sept. 30,1975 Sheet 2 of7 3,908,917

US. Patent Sept. 30,1975 Sheet 3 of7 3,908,917

1I+i+m FIG. 4 x 5 U.S. Patent Sept. 30,1975 Sheet4 0f7 3,908,917

US. Patent Sept. 30,1975 Sheet 5 of7 3,908,917

48\L3\53/37 3 his:

I 38Q ink US. Patent S e pt. 30,1975 Sheet 6 of7 3,908,917

US. Patent Sept. 30,1975

Sheet 7 of 7 DEFLECTING MECHANISM FOR CONTROLLING THREAD BEING WOUND ONTO A SPOOL CORE BACKGROUND OF THE INVENTION In thread packages of a certain type, it is conventional to provide on the spool core next to the thread package a so-called reserve winding that is intended to make it possible for the end of the thread located on the spool core to be available at any time. In this way, uninterrupted operation can be achieved during unwinding at alternate ends of the thread from the package. The spool core is generally driven by a friction roller that bears on the periphery of the spool core or the thread package formed thereon.

At the high speeds at which the thread is fed from a delivery mechanism to the spool, it is relatively difficult to apply the reserve winding on the spool. The prior art procedure is generally such that the thread is inserted or secured into a groove in the spool core. Because of the presence of the frictional drive, it is thus only possible to insert the thread into the groove at the side of the spool core opposite the friction roller. Consequently, the thread has to be inserted into the peripheral groove of the spool core in a direction opposite to the direction of rotation of the same.

As soon as the thread is secured in the groove, it is carried in the direction of rotation of the spool core. Hence, the thread is turned back slightly and is no longer under tension. The delivery mechanism continuously delivers a length of thread. Thus, the thread is turned back slightly on the spool core and will fluctuate to-and-fro until the spool core has correctly gripped or tensioning the thread in its direction of rotation. Upon this tensioning, a reaction can occur causing the thread to break thereby necessitating repetition of the winding procedure. The fluctuating thread may also pass between the friction roller and the spool core where it will be broken or disintegrated as a result of friction. Much depends on the skill of the operator in bringing about the start of the reserve winding as required, and without error.

PURPOSE OF THE INVENTION An object of the present invention is to provide apparatus for forming a reserve winding during winding of a thread onto a spool core. The thread to be inserted into the groove in the spool core is maintained under tension when the thread inserted in said groove turns in the other direction.

Another object of the invention is to control the number of windings in the reserve winding.

SUMMARY OF THE INVENTION The invention described herein includes means for supplying the thread from a delivery mechanism through a traversing device to a spool core. The end of the thread is secured in a groove in the spool core. A deflecting mechanism causes the thread to be exposed to a short-term deviation along a defined length between the delivery mechanism and the traversing device.

In one embodiment, the deflecting mechanism includes a blower mechanism which directs ajet of fluid medium against the thread. The incorporation of a blower device in the thread path between the delivery mechanism and the traversing device enables the thread inserted in the groove to be kept under tension as it turns in the direction of rotation of the spool core. Consequently, uncontrolled movements of the thread are eliminated. In this embodiment, an air jet comes into action at the point when the thread, turning in the direction of rotation of the spool, begins to lose its tension. This loss of tension is utilized by the jet to force the thread into a loop formation in a predetermined zone. Under the effect of the air-cushion, the released thread length is taken up by the blower device. Thus, the thread is kept constantly under tension during formation or initiation of the reserve winding. A shortduration jet of air is sufficient.

As soon as the thread has used up the thread length stored in the loop during continuous formation of the reserve winding, the jet of air is no longer necessary. The intensity of the air-jet may be adjustable. In this way, the number of windings for the reserve winding can be varied. Thus, to this extent, regulation can be undertaken by means of the intensity of the air-jet.

The blower mechanism comprises a blower nozzle at one side of the thread associated with a casing head at the other side of the thread. The casing head includes a chamber extending into the interior thereof. Between the blower nozzle and the casing head, the thread runs in a straight line and under tension. In front of the chamber opening, there may be provided two vertically spaced stationary thread guides, which come into effect when the jet of air pushes the thread into the chamber in order to form the loop.

In the region of the lower thread guide of the casing head, a deflector pin for the thread is located and may be connected to the thread guide located at that point. The deflector pin may be arranged to run obliquely to the longitudinal axis of the casing, i.e. in the direction of the winding to be formed on the spool. After completion of the reserve winding, the thread slips past the deflector pin because an oblique traction is exerted on the thread by the thread triangle. The operation of the thread triangle is well known. Thus, the thread can be automatically tranmsitted into the thread guide of the traversing device which is designed to be selfthreading. In this way, the thread from the reserve winding is automatically passed for the formation of a thread package on the spool core by means of the traversing device.

Another feature of the invention is the use of a plurality of jets in the blower nozzle. These jets are so arranged that they point towards a common medial axis. In this way, a thread loop of the desired size is automatically formed. Thus, the depth of the loop depends upon the intensity of the air-jet which can be altered. Air, steam or liquid may be used as a fluid medium for the blowing jet.

The deflecting mechanism for the thread may alternatively be in the form of a rotary worm on which the thread bears tangentially and is moved to the end of the worm.

By the use of a rotary worm for guiding the thread from the beinning of the reserve winding to the end of same, i.e. until the beginning of the formation of a thread package, the thread application in the reserve winding is carried out in a controlled manner. It no longer depends whether and to what extent the windings proceed on the spool core for the reserve windings because of the lateral traction of the so-called thread triangle. On the contrary, the thread is automatically guided over the entire length of the reserve winding and brought into the region of the thread guide of the traversing device.

The thread meets less friction on the worm having automatic guidance than on a deflecting mechanism which is designed a fixed guide surface. Apart from improved and cleanly-guided thread application in reserve winding, the thread tension is less impaired by the safe guidance provided by the rotatable worm. This means that the reserve winding can be safely and reliably made at high speeds of the thread, such as, for example. in excess of 4,000 meters per minute. Above all. the winding process of the reserve winding is perfect. superimposition of thread on the spool is eliminated and the path of the reserve winding is a precise spiral.

In this embodiment, the worm is housed in a casing which also contains a drive device for the worm. The drive device for the worm may be a pneumaticallyoperated vane wheel or air turbine. The casing may be secured to the frame of a winding machine by a connection such as a ball and socketjoint so that the worm can be directed at any desired angle. The casing may also contain the blower duct oriented in the direction of the casing head chamber thereby forming a thread deflection unit. This eliminates the need for providing a separate blower head to form the loop-shaped thread deflection.

Recently, stretchable threads are frequently wound, i.e. threads which are only partly pre-stretched arrive at the winding stage. The final stretching of the threads is only effected during texturising where the heat generated at this stage can also be utilized. When such partly-stretched threads are applied to the spool core, i.e. are inserted into the groove in the spool core, it is unavoidable that the partly-stretched thread will be extended slightly further. In this case, the degree of further stretching is uncontrollable. It is, for example, influenced by the type of turn-over of the thread and the spool core during the insertion procedure. Greater or lesser jolts can be experienced on the thread. Consequently, the thread undergoes different tensions thus giving rise to different degrees of partial stretching on the thread.

Such a thread is unsuitable for practical use. Varying partial stretching, for example, has an effect on the dyeing process for the thread and is thus seen in the finished product. It is therefore desirable that the length of thread wound onto the spool core and subject to uncontrollable tensions, can be easily eliminated during later use of the thread spool with the reserve winding. Normal conditions of constant thread tension can be achieved in the production of the reserve winding after the thread end is initially secured to the spool core.

A so-called dead winding or short winding on the spool may also be provided by the use of a deflecting mechanism. In this embodiment, the thread does not wander along the spool and the conditions of tension on the thread are normalized. Formation of the reserve winding begins only after that. Here, the deflecting mechanism includes a blocking unit for holding up the displacement of the thread in the direction of the traversing device. The action of the blocking unit can be initiated by the thread itself via a switch controlled by the thread. The blocking unit may be used in conjunction with a blower device. Here the switch is in advance of the point of contact of the jet of fluid medium.

When the blocking unit halts the movement of the thread in the direction of the traversing device for a limited period. the thread is prevented, at a suitable moment, from passing into the effective area of the deflector unit which may include a rotating worm for forming the reserve winding. The thread is thus brought to a standstill. A dead winding or short winding thus results. The thread is wound for a short period in a superimposed fashion on the spool. Formation of the reserve winding only begins after this.

The blocking unit may be triggered automatically by the thread itself. During the time in which the jet of fluid medium is operating, the thread winds on the spool core into a dead or short winding. Thus, the turnover of the thread is carried out in the other direction. The few windings of the thread in the dead windings are sufficient to provide constant thread tension conditions so that the degree of partial stretching of the thread is no longer interfered with. Formation of the dead winding is effected at a predetermined thread tension of the partly-stretched thread. The dead or short winding is unusable and unnecessary for the unwinding procedure. It is easily removed by cutting it transversely whereupon it drops off the spool. The beginning of the reserve winding is thus left free. Here, however, a thread of predetermined quality as regards partial stretching is already present.

The blocking mechanism may include a reciprocating pin or the like moving into the displacement path of the thread under the influence of a pressure medium e.g. pneumatically. After a predetermined period, the pin is automatically returned into the inoperative position. That is, the pin operates between a retracted position and an extended position. The blocking unit can be rendered effective by a switch with a feeler member which responds to and yields to the thread to be applied. Such a pulse is sufficient to initiate actuation of the pressure medium of the blocking mechanism.

The length of time the blocking pin is held in its operative position is obtained by means of a throttling device for the pressure medium, for example compressed air, operating the blocking unit. The blocking pin is firstly held in its extended position under the full pressure of the pressure medium. The pressure medium escapes gradually through the throttling device out of the cylinder so that the blocking pin which is under spring bias goes back gradually. After a predetermined amount of travel of the blocking pin, the thread is released for further transverse movement in the direction of the traversing device. The throttling device may be adjustable so that the time can be easily regulated thereby.

BRIEF DESCRIPTION OF DRAWINGS Other objects of this invention will appear in the following description and appended claims, reference being made to the accompanying drawings forming a part of the specification wherein like reference characters designate corresponding parts in the several views.

FIG. la is a sectional view of an apparatus made in accordance with this invention along the line lu-Ia of FIG. 2,

FIG. lb is a sectional view of the apparatus of FIG. la taken at the position Ib-Ib as shown in FIG. 2 at a different phase of the procedure used with the apparatus of the invention,

FIG. 2 is a top plan view in the direction of the arrow II as shown in FIGS. la and 1b showing only a portion of the apparatus being considered,

FIG. 3 is a side elevational view of a blowing mechanism made in accordance with this invention,

FIG. 4 is a top plan view of the mechanism of FIG.

FIG. 5 is an elevational view along line VV of FIG. 3,

FIG. 6 is an elevational view taken along line VI--VI of FIG. 3,

FIG. 7 is a top plan view partially in section of another embodiment of a deflector mechanism made in accordance with this invention,

FIG. 7a is a sectional view along line VIIVII of FIG.

FIG. 8 is a side elevational view of the deflector mechanism of FIG. 7,

FIG. 9 is a side elevational view of a further embodiment of an apparatus made in accordance with this invention,

FIG. 10 is a top plan view of the embodiment shown in FIG. 9 with the position of the thread immediately upon insertion or application to the winding spool,

FIG. 11 is a top plan view of the embodiment of FIG. 9 showing the position of the thread for forming the dead winding,

FIGS. 12 through are elevational views taken along the line of XII-XII of FIG. 10 showing four different positions of the thread from the insertion process until winding onto the spool,

FIG. 16 is a top plan view of a device made in accordance with this invention showing a modified detail arrangement for release of the blocking device for the thread.

DESCRIPTION OF SPECIFIC EMBODIMENTS More specifically, referring to FIGS. 1a and lb, the thread 1 is fed to a spool core 5 mounted on a cylindrical shaft 6 by a delivery mechanism, generally designated 2, comprising

rollers

3 and 4 that operate at constant r.p.m. A traversing device 7 includes a thread guide 8 that is driven back and forth across the width of the spool core 5 by a reverse thread roller 9. The spool core 5 is driven by a friction roller 10 which engages the periphery of the spool core 5 or the thread being wound thereon. The friction roller 10 may be driven by a motor 11 by way of

pulleys

12 and 13 and a transmission belt 14. A groove 15 is located on the outside surface of the spool core 5 outside the region of the thread package to be formed. The groove 15 serves as a securing point for the end of the thread which is to be wound onto the spool core 5. The friction roller 10 and the spool core 5 are driven in the direction shown by the arrows located thereon in FIGS. 1a and 1b. The construction of the spool core 5 and the relationship between and among the delivery mechanism 2, the traversing device 7, the spool core 5 and friction roller 10 are in accordance with prior art apparatus.

An auxiliary mechanism comprising a blower nozzle 16 and a casing head 17 is disposed between the delivery mechanism 2 and the traversing device 7. This auxiliary mechanism is used to prevent uncontrolled motion or whirling of the start of the thread after its insertion into the groove 15 in the spool core 5. The blower nozzle 16 includes a feed pipe 18 which supplies the blowing medium and an arcuate wall 19 located in the forward part of the blower and having apertures 20 as shown in FIG. 3.

The casing head 17 lies opposite the blower nozzle 16 and has an open ended chamber 21. Stationary thread guides 22 and 23 are located at the upper and lower parts, respectively, of the forward opening of the chamber 21. In this specific embodiment, the thread guides 22 and 23 are made of ceramic material to reduce friction. A deflector pin 24 is connected to the lower guide 23 for contacting the thread 1. The blower nozzle 16 and the casing head 17 are fitted with mounting

plates

25 and 26 having

slots

27 and 28, respectively, for adjustably locating the mutually opposed head and nozzle.

In operation, the thread 1 supplied by delivery mechanism 2 is inserted and fixed by its end la into the groove 15. The thread end la is placed in the groove on the side of the spool core 5 opposite the friction rol ler 10 using conventional means such as a suction gun. It is not possible for the thread end to be pulled directly between the spool core 5 and the friction roller 10 which are in frictional contact by using conventional thread handling means such as a suction gun.

At the initial moment when the thread end la is brought to the side of the spool core 5 by the conventional thread handling means, it is under tension. However, once the thread end la is securely set in the groove and carried along with the rotating spool core 5, the thread 1 becomes completely untensioned and a slack condition is experienced in the thread 1 between the delivery mechanism 2 and the spool core 5. The auxiliary blowing device including blower head 16 and casing head 17 is provided to eliminate or provide compensation for the slackness in the thread 1 so that a tensioned condition is maintained in the thread 1 until it begins to wind around the spool core 5.

That is, the blower nozzle 16 produces an air jet which forms a loop lb in the tension-free length of the thread 1. The chamber 21 receives the loop 1b and thus the thread 1 is kept under tension as stated. The thread end la is carried in the direction of rotation of the spool core 5 and draws the loop lb back so that it gradually reduces in size until the thread 1 .again adopts an entirely straight configuration as shown in FIG. 112. As soon as the thread 1 has become taut, it can slide on the deflector pin 24 and is automatically passed into the thread guide 8 of the traversing device 7. Thereafter, the buildup of the thread package on the spool core 5 begins in a known manner. The blower device only operates during the initial threading procedure and is then out of action during the formation of the thread package.

The formation of the loop 1b during the initial threading operation is effected while thread 1 is in an untensioned condition. The oblique positioning of the deflector pin 24 determines the length of the reserve winding in conjunction with the intensity of the air-jet formed by the blower nozzle 16.

Another embodiment of the invention is shown in FIGS. 7 and 8 wherein a rotatable worm 30 comes into tangential contact with thread 1. Thread 1 is moved by the spiral thread of the worm 30 to the end of the worm that is rotatably mounted in a casing 31. In this specific embodiment, worm 30 is pneumatically driven with the air being passed into the interior of the casing 31 through the feed nozzle 32. The air strikes a vane wheel 33 connected to the worm shaft end 300 protruding into chamber 31a. Air is exhausted through the air outlet 34.

The casing 31 is adjustably mounted on a support plate 35 by a ball and socket joint 36. A guide plate 37 is connected to the casing 31 and located opposite guide plate 39 thereby forming a slot 39 therebetween. The thread 1 is inserted through slot 39 as far as the height of the worm 30. The plate 35 is adjustably secured to the frame of a winding machine by means of slots 40 and screws 41. Guide plate 38 is located on the casing head 17 which includes a chamber 21 that is defined above and below by the two guide pins 22 and 23.

A blower device is housed directly in the casing 31 along with the worm 30 and is used to cause thread deflection into the chamber 21. Air feed nozzle 42 leads to a duct 43 in the casing above the worm 30. Air duct 43 is so directed that it points toward the thread 1 which 'passes vertically through the device. During the time in which the thread 1 is loose or in an untensioned state after its attachment to spool core 5, it is deflected to form a loop which extends into the chamber 21. A plate 380 extends along one side of the chamber 21 as shown and extends in an overlapping relationship with respect to the worm 30. The casing head 17 can be transversely adjusted by means of slots 44 and screws 45. The casing 31 is secured to plate 35 by a screw 36a.

After the thread 1 to be inserted has been fixed in the groove 15 of the spool core 5, it is carried along in a clockwise direction by the spool core as described hereinabove. While the thread 1 is in an untensioned or loose condition, an air jet passes through duct 43 and blows the tension-free length of thread 1 into a loop in the chamber 21. As the thread 1 is carried along in the direction of rotation of the spool core 5, the loop formed within chamber 21 is drawn in an becomes smaller. The thread 1 now passes to the smaller, inner end of worm 30. The spirals of the rotating worm 30 move the thread 1 outwardly forming a reserve winding. Thread 1 is grasped by the oscillating thread guide 8 once it is disposed at the outer end of the worm 30 and the thread package begins to build up on the spool core 5. The air-jets for the duct 43 and vane wheel 33 of worm 30 are only temporarily in action, at the appropriate time to achieve the desired results.

The speed of rotation of the worm 30 may be regulated and adjusted. This is effected by appropriate regulation of the air supply to the vane wheel 33 by an adjustable throttle device provided in the inlet 32. In the case of a worm with constant pitch of the worm thread and a smaller rotational speed of the worm, a larger number of windings are applied to the spool core as a reserve winding than if the worm 30 rotated at a higher speed. The number of windings of the reserve winding that is deposited in spiral form is therefore dependent on the speed of rotation of the worm 30 when the thread speed is uniform. The width of the reserve winding remains unaltered. A greater or lesser thread length can be applied to the same width by regulation of the speed of the rotation of the worm 30.

A further embodiment showing another feature of the invention is shown in FIGS. 9l6. A blocking device 47 is operated in conjunction with the worm 30 to form a dead winding or short winding in front of the reserve winding. The blocking device 47 is used to halt the movement of the thread 1 in the direction of the thread guide 8 moved by the traversing device 9. The blocking device 47 includes a blocking pin 48 having a piston 48a located at the inner end thereof. The piston 48a slides in a cylinder 49. The blocking pin 48 is biased or spring loaded by spring 50 in a direction toward its iriner end. Thus, the blocking pin 48 is pushed outwardly against the action of the spring 50 by a pressure medium supplied through pipe 51 and controlled by the control device 52.

A release unit controls the supply of pressure medium for operating the blocking pin 48 via the piston 48a. The release unit includes a sensing feeler 53 that is connected to a switch 54. In this embodiment, the pressure medium is compressed air. A control line 55 leads from the switch 54 to the control device 52 for controlling the supply of pressure medium for operating the blocking pin 48. Throttle device 56 is provided at an appropriate point for the cylinder 49 and has an adjustable cross-section through which the compressed air in cylinder 49 can gradually escape.

Thread 1 is inserted through the slot 39 formed between

guide plates

37 and 38. In this specific embodiment, the sensing feeler 53 is pivotally mounted at 53a and gives way in the direction shown by arrow A when the thread 1 becomes tensioned. The thread 1 is tensioned when the thread end is inserted into the groove 15 of the spool core 5 as discussed hereinabove. When the sensing feeler 53 yields, the tension thread slides therefrom and passes in front of the blower duct 43 which forms a thread loop extending into the chamber 21 upon the activation of the airjet.

Thread 1 is supplied from a point located above the traversing device and half-way between the ends of the spool core 5. Thus, thread 1 has an oblique movement from its point of supply to the ends of the spool core 5. This relationship between the point of supply for the thread and the ends of the spool core 5 is commonly referred to as the thread triangle in the prior art. Due to this relationship, referring to FIGS. 12 through 15, the thread 1 has a tendency to move to the left as seen in the plane of the drawings. Thus, the thread 1 slides from the guide plate 38 out of the slot 39 after the thread formed by the jet blow device has 1 been removed.

Before thread 1 can pass onto the rotating worm 30,

it comes into contact with the advanced blocking pin 48 as shown in FIG. 13. As long as the blocking pin 48 prevents further movement of the thread 1 in the direction of the thread guide 8 being moved by the traversin g device 9, the thread 1 remains at the same point and is thus wound onto the spool core 5 at the same point in the direct vicinity of groove 15. Thus, a dead or short winding is provided on the spool core 5.

After 8 to 12 windings of thread 1 are formed on the spool core 5, the period for halting the transverse movement of the thread 1 to the thread guide 8 of the traversing device 9 has expired. The pressure of compressed air on the piston 48a in the cylinder 49 is reduced because of the throttling device 56. Once the compressed air pressure has reduced far enough so that the return spring 50 has gained the upper hand, the blocking pin 48 is retracted so that thread 1 is no longer blocked so that it comes into contact with the rotating worm 30. The buildup of reserve winding 58 onto the spool core 5 begins at once until the thread 1 has left the worm 30 and is taken up by the thread guide 8 for continuous movement back and forth across the spool core by action of the traversing device ,9. Reference is specifically made to the operation as shown in FIGS. 14 and 15. The thread roll or package 59 is then formed in a known manner on the spool core 5-,

Once thread 1 has jumped or left the sensing feeler 53, the latter automatically returns to its original position. Thus, the compressed air to cylinder 49 is switched off via the switch 54, control line 55 and control device 52. The dead or short winding 57 is separated before utilization of reserve winding 58 for connection to an adjacent thread roll, during the unwinding process, by a transverse cut. Thus, the beginning of the reserve winding 58 is left free for knotting to an adjacent spool winding. On the dead winding, there is located the irregularly stretched portion of thread. This is unusable and is thrown away. At the end of the dead winding, the thread tension has adjusted itself to the normal value, so that the reserve winding contains thread at the normal predetermined partial stretching.

A modified form of the switching or control mechanism for actuating the blocking device 47 is shown in FIG. 16. A sensing feeler 60 is pivotally mounted at 64 on one wall 38a of the chamber 21. The sensing feeler or flap 60 can only pivot outwardly with respect to the wall 38a and is used for initiating actuation of the blocking device 47. A small tube 61 provides an air duct directed toward the flap or sensing feeler 60.- A pressure responsive pulse unit 62 is disposed in the small tube 61 and is used to control the operation of the blocking unit 47. The flap 60 is held in a sensing posi tion by the air-jet supplied through the tube 61. This arrangement performs the same function as the previously described sensing feeler 53.

When thread 1 is placed into the slot 39, it moves in the direction of the traversing device 9 and strikes the flap 60. Flap 60 pivots about the point 64 and closes off the flow of air through the tube 61. That is, a buildup and stoppage ofthe air-jet 63 is effectuated. Consequently, pressure in tube 61 increases causing the pulse unit 62 to respond by switching on the blocking device. That is, the blocking pin 48 is caused to advance. When the blocking pin 48 advances, the buildup of the dead or short winding is begun. Blocking pin 48 reverts to its inoperative or retracted position after a predetermined period of time and the thread 1 passes into the region of the thread guide 8 of the traversing device 9. The utilization of buildup pressure in the air supply flow inside tube 61 has the advantage that the thread tension for the switch-over procedure is considerably lessened. It can be lowered to 0.5 grams. Sensitivity is in this way increased.

While the deflecting mechanism for controlling thread being wound onto a spool core has been shown and described in detail, it is obvious that this invention is not to be considered as being limited to the exact form disclosed, and that changes in detail and construction may be made therein within the scope of the invention, without departing from the spirit thereof.

Having thus set forth and disclosed the nature of this invention, what is claimed is:

1. An apparatus for forming a reserve winding during the initial winding of a thread onto a spool core having a thread package winding area, said apparatus comprising:

a. means for delivering a supply of thread to a spool core at an end location axially displaced from said winding area,

bv means for forming a reserve winding at said end location of the spool core,

c. a traversing device for directing the supply of thread from the reserve winding of said end location to the winding area along the spool core to form a thread package, and

d. a deflecting mechanism located at said end location for effecting a short-time duration of deflection along the length of the thread at said end location spaced away from the spool core only during the time period while the thread is in an untensional condition when the end of the thread is initially secured to the spool core winding.

2. An apparatus as defined in claim 1 wherein said deflecting mechanism includes a blower mechanism including means for directing ajet of fluid medium against the thread and being effective to form a loop therein when the thread is in an untensioned condition between the delivery mechanism and the end of the thread secured to the spool core.

3. An apparatus as defined in claim 2 wherein said jet directing means includes a blower nozzle disposed on one side of the thread and a casing thread disposed on the other side of the thread,

said casing head including a chamber for receiving the loop of thread formed upon blowing of the jet of fluid medium,

said reserve winding forming means includes a deflector pin extending obliquely to the longitudinal axis of said casing head in the direction of the thread package to be formed on the spool core winding area. 1

4. An apparatus as defined in claim 2 wherein said jet directing means has a plurality of apertures forming a plurality of jets,

said jets being oriented toward a common medial axis.

5. An apparatus as defined in claim 2 wherein said deflecting mechanism includes means for providing steam or liquid for use as the fluid medium in the blowing mechanism.

6. An apparatus for forming a reserve winding during the initial winding of a thread onto a spool core having a thread package winding area, said apparatus comprising:

b. means for forming a reserve winding at said end location of the spool core,

0. a traversing device for directing the supply of thread from the reserve winding of said end location to the winding area along the spool core to form a thread package, and

d. a deflecting mechanism located at said end location and being effective to form a loop therein during the time while the thread is in an untensioned condition when the end of the thread is initially secured to said end location,

e. said deflecting mechanism including a blower nozzle disposed at one side of the thread for directing a jet of fluid medium against the thread and a casing head disposed on the other side of the thread,

f. said casing head including a chamber for receiving the loop of thread formed upon blowing of the jet of fluid medium. w I

7. An apparatus forming a reserve winding during the initial winding of a thread onto a spool core-having a thread package winding area, said apparatus comprisa. means for delivering a supply of thread to a spool core at an end location axially displaced from said winding area,

bv means for forming a reserve winding at said end location of the spool core,

e. a traversing device for directing the supply of thread from the reserve winding of said end location to the winding area along the spool core to form a thread package, and

d. a deflecting mechanism for effecting a short-time duration of deflection along the length of the thread at said end location spaced away from the spool core while the thread is in an untensioned condition when the end of the thread is initially secured to the spool core,

e. said reserve winding forming means including a rotatably mounted worm disposed between the end location and the traversing device and a driving means for rotating said worm,

f. said worm being disposed for tangential contact with the thread being supplied from the delivery mechanism and being effective to move the thread from one end of the worm to the other thereby causing a reverse winding to form at the end of the spool core,

g. said driving means being disposed in a casing and having a pneumatically operated vane wheel.

8. An apparatus as defined in claim 7 wherein said casing is adjustably mounted on the support plate by means of a ball and socket assembly.

9. An apparatus as defined in claim 7 wherein said worm has a conical shape with a diameter increasing in the direction of movement of the thread toward the traversing device,

said worm being freely supported within the path of movement for said thread.

10. An apparatus for forming a reserve winding during the initial winding of a thread onto a spool core having a thread package winding area, said apparatus comprising:

b. means for forming a reserve winding at said end location of the spool core,

e. said reserve winding forming means including a rotatably mounted worm, a pneumatically operated drive means for rotating said worm and means for controlling the air supply to said pneumatically operated drive means to regulate and adjust the speed of rotation of the worm,

f. said worm being disposed for tangential contact with the thread being supplied from the delivery mechanism and being effective to move the thread from one end of the worm to the other thereby causing a reverse winding to form at the end of the spool core.

ll. An apparatus as defined in claim wherein said control means includes a throttle device. 12. An apparatus for forming a reserve winding during the initial winding ofa thread onto a spool core hav- 5 ing a thread package winding area, said apparatus comprising:

a. means for delivering a supply of thread to a spool core at an end location and axially displaced from said winding area,

b. means for forming a reserve winding at said end location of the spool core,

0. a traversing device for directing the supply of thread from the reserve windings of said end location to the winding area along the spool core to form a thread package, and

d. a deflecting mechanism including means for effecting a short-time duration of deflection along the length of the thread at said end location spaced away from the spool core when the end of the thread is initially secured to the spool core,

e. said reserve winding forming means including a blocking means for halting movement of the thread in the direction of the traversing device and means for actuating said blocking means.

13. An apparatus as defined in claim 12 wherein said actuating means includes a feeler member which yields to the thread to be inserted and a switch mechanism which turns the blocking means on and off.

14. An apparatus as defined in claim 12 wherein said blocking means includes a reciprocating pin which moves between a retracted position and an extended position under the influence of a pressure fluid medium into the path of movement of the thread,

said actuating means including a feeler member which yields to the thread inserted and a switch means which controls the supply of pressure fluid medium to the blocking device through a control line.

15. An apparatus as defined in claim 12 wherein said actuating means includes a trigger unit for actuating the blocking means, a flap member pivotally mounted in a thread inlet slot and means for directing an air flow against said flap member on a side of the flap opposite to the movement of the thread toward said flap,

said actuating means further including a pulse unit disposed in said air flow producing means and being responsive to an increase in pressure in the air flow for actuating the blocking means.

16. An apparatus as defined in claim 12 wherein said blocking means includes a reciprocating pin and means for moving said pin between a retracted position and an extended position,

said pin being in the path of movement of the thread when in the extended position,

said blocking means further including means for automatically returning the pin to its retracted position after a predetermined period of time.

17. An apparatus as defined in claim 16 wherein said blocking means includes a cylinder which houses said blocking pin and said returning means includes a spring means for biasing said blocking pin within said cylinder against the influence of a pressure fluid medium.

Claims

1. An apparatus for forming a reserve winding during the initial winding of a thread onto a spool core having a thread package winding area, said apparatus comprising: a. means for delivering a supply of thread to a spool core at an end location axially displaced from said winding area, b. means for forming a reserve winding at said end location of the spool core, c. a traversing device for directing the supply of thread from the reserve winding of said end location to the winding area along the spool core to form a thread package, and d. a deflecting mechanism located at said end location for effecting a short-time duration of deflection along the length of the thread at said end location spaced away from the spool core only during the time period while the thread is in an untensional condition when the end of the thread is initially secured to the spool core winding.

2. An apparatus as defined in claim 1 wherein said deflecting mechanism includes a blower mechanism including means for directing a jet of fluid medium against the thread and being effective to form a loop therein when the thread is in an untensioned condition between the delivery mechanism and the end of the thread secured to the spool core.

3. An apparatus as defined in claim 2 wherein said jet directing means includes a blower nozzle disposed on one side of the thread and a casing thread disposed on the other side of the thread, said casing head including a chamber for receiving the loop of thread formed upon blowing of the jet of fluid medium, said reserve winding forming means includes a deflector pin extending obliquely to the longitudinal axis of said casing head in the direction of the thread package to be formed on the spool core winding area.

4. An apparatus as defined in claim 2 wherein said jet directing means has a plurality of apertures forming a plurality of jets, said jets being oriented toward a common medial axis.

6. An apparatus for forming a reserve winding during the initial winding of a thread onto a spool core having a thread package winding area, said apparatus comprising: a. means for delivering a supply of thread to a spool core at an end location axially displaced from said winding area, b. means for forming a reserve winding at said end location of the spool core, c. a traversing device for directing the supply of thread from the reserve winding of said end location to the winding area along the spool core to form a thread package, and d. a deflecting mechanism located at said end location and being effective to form a loop therein during the time while the thread is in an untensioned condition when the end of the thread is initially secured to said end location, e. said deflecting mechanism including a blower nozzle disposed at one side of the thread for directing a jet of fluid medium against the thread and a casing head disposed on the other side of the thread, f. said casing head including a chamber for receiving the loop of thread formed upon blowing of the jet of fluid medium.

7. An apparatus forming a reserve winding during the initial winding of a thread onto a spool core having a thread package winding area, said apparatus comprising: a. means for delivering a supply of thread to a spool core at an end location axially displaced from said winding area, b. means for forming a reserve winding at said end location of the spool core, c. a traversing device for directing the supply of thread from the reserve winding of said end location to the winding area along the spool core to form a thread package, and d. a deflecting mechanism for effecting a short-time duration of deflection along the length of the thread at said eNd location spaced away from the spool core while the thread is in an untensioned condition when the end of the thread is initially secured to the spool core, e. said reserve winding forming means including a rotatably mounted worm disposed between the end location and the traversing device and a driving means for rotating said worm, f. said worm being disposed for tangential contact with the thread being supplied from the delivery mechanism and being effective to move the thread from one end of the worm to the other thereby causing a reverse winding to form at the end of the spool core, g. said driving means being disposed in a casing and having a pneumatically operated vane wheel.

9. An apparatus as defined in claim 7 wherein said worm has a conical shape with a diameter increasing in the direction of movement of the thread toward the traversing device, said worm being freely supported within the path of movement for said thread.

10. An apparatus for forming a reserve winding during the initial winding of a thread onto a spool core having a thread package winding area, said apparatus comprising: a. means for delivering a supply of thread to a spool core at an end location axially displaced from said winding area, b. means for forming a reserve winding at said end location of the spool core, c. a traversing device for directing the supply of thread from the reserve winding of said end location to the winding area along the spool core to form a thread package, and d. a deflecting mechanism for effecting a short-time duration of deflection along the length of the thread at said end location spaced away from the spool core while the thread is in an untensioned condition when the end of the thread is initially secured to the spool core, e. said reserve winding forming means including a rotatably mounted worm, a pneumatically operated drive means for rotating said worm and means for controlling the air supply to said pneumatically operated drive means to regulate and adjust the speed of rotation of the worm, f. said worm being disposed for tangential contact with the thread being supplied from the delivery mechanism and being effective to move the thread from one end of the worm to the other thereby causing a reverse winding to form at the end of the spool core.

11. An apparatus as defined in claim 10 wherein said control means includes a throttle device.

12. An apparatus for forming a reserve winding during the initial winding of a thread onto a spool core having a thread package winding area, said apparatus comprising: a. means for delivering a supply of thread to a spool core at an end location and axially displaced from said winding area, b. means for forming a reserve winding at said end location of the spool core, c. a traversing device for directing the supply of thread from the reserve windings of said end location to the winding area along the spool core to form a thread package, and d. a deflecting mechanism including means for effecting a short-time duration of deflection along the length of the thread at said end location spaced away from the spool core when the end of the thread is initially secured to the spool core, e. said reserve winding forming means including a blocking means for halting movement of the thread in the direction of the traversing device and means for actuating said blocking means.

14. An apparatus as defined in claim 12 wherein said blocking means includes a reciprocating pin which moves between a retracted position and an extended position under the influence of a pressure fluid medIum into the path of movement of the thread, said actuating means including a feeler member which yields to the thread inserted and a switch means which controls the supply of pressure fluid medium to the blocking device through a control line.

15. An apparatus as defined in claim 12 wherein said actuating means includes a trigger unit for actuating the blocking means, a flap member pivotally mounted in a thread inlet slot and means for directing an air flow against said flap member on a side of the flap opposite to the movement of the thread toward said flap, said actuating means further including a pulse unit disposed in said air flow producing means and being responsive to an increase in pressure in the air flow for actuating the blocking means.

16. An apparatus as defined in claim 12 wherein said blocking means includes a reciprocating pin and means for moving said pin between a retracted position and an extended position, said pin being in the path of movement of the thread when in the extended position, said blocking means further including means for automatically returning the pin to its retracted position after a predetermined period of time.