US3637148A - Device for pneumatically removing the tip or foot bunch from supply coils - Google Patents

Abstract

Device for pneumatically removing the tip or foot bunch from supply coils comprising means for placing the end of a supply coil wound with a bunch, that is to be removed, within an air current so that a thread end in the bunch is exposed, and mechanical removing mechanism for slidingly seizing the thread end and drawing it off in the flow direction of the air current. The mechanical removing mechanism comprises two rotary members having peripheral surfaces at least nearly in engagement with one another.

Description

l m 1.1 1 1 l :11 I llnitnll ttes atenlt 1 1 1 m Muppet" lane M 19 /2 [54] DEW/NEE FUR EPNlE UMATH CALLY [5 6] References Cited llliEMUl/ENG THE 'lllP UN FUND/ll WUIWCH HFRWW SIUPWJW (GONE UNlTED STATES PATENTS 2,149,778 3 1939 Kimbirl ..2s/19 IIIVBHIOI'. GKUPRBF, RIckelrathl KX'CIS Drake et al- T e enz! many 3,059,866 10 1962 Reiners 242/35.6 (E) 73 Assignee: Walter llleiners, Monchengladbach, Ger- 311081618 63 Kondo er a1. ..242/35.6 (E) ux many 3,136,494 6/1964 Furst ..242/35.6 (E) 22 Filed: June 6, 1969 FOREIGN PATENTS OR APPLICATIONS 21 Appl. No.: 870,888 848,913 9/1960 Great Britain Related Application Dam Primary Examiner Stanley N. Gilreath 2 Division of No 59 Nov 30, 1966 Pat NO Attorney-Curt M. Avery, Arthur E. Wilfond, Herbert L.

3,464,640 Lerner and Daniel J. Tick 57] ABSTRACT Foreign pp l' Dam Device for pneumatically removing the tip or foot bunch from Dec. 2 1965 Germany ..R 42100 Supply COmPYiSmg means Placing the end a supply coil wound with a bunch, that is to be removed, within an air 52 II.s.c1 ..2A2/35.6IE that a thread and the bunch is exposed and s1 Im.1c1........ .......................M36511 541/06 mechanical removing mechanism slidingly seizing 58 lFiQid 61 Search ..242/35.6, 35.6 E 35.5 35.5 A- thread end and drawing it off the directim 0f the current. The mechanical removing mechanism comprises two rotary members having peripheral surfaces at least nearly in engagement with one another.

llll Claims, 9 Drawing Figures DEVICE. IFOllt INEUMATIICALLY REMOVING 'lllIIlE 'lllllP ft IFGUT BUNCH FROM SUPPLY CGIILS This is a division of application, Ser. No. 598,062, filed Nov. 30, 1966, now U.S. Pat. No. 3,464,640.

My invention relates to device for pneumatically removing the tip or foot bunch from supply coils, such as, for example, spinning cops, bobbins, pirn or the like.

Devices of the aforementioned type serve for placing in readiness the upper or lower winding, that is the bunch of windings located at the tip of the coil or at the foot of the coil, for a further processing operation whereby the thread ends can be gripped by the thread gripping members of the further processing machine, such as, for example, a thread-winding machine. In order to be able to place these thread ends in readiness, it is necessary also to remove the tip bunch or foot bunch in which the thread is located.

In U.S. Pat. No. 2,208,930 to G. Kahlisch, and more par ticularly, in FIGS. and 6 therein, there is disclosed a device employing both pneumatic as well as mechanical means for ef fecting the removal of the tip or foot bunch from supply coils. Mechanical devices for drawing off the tip or foot bunch are advantageous in one respect, in that they provide virtually total assurance that the bunch will be removed, but such mechanical devices, however, have the disadvantage in another respect, in that they can be used only to a limited extent for coil cores of varying dimensions. Moreover, with these mechanical bunch removal devices, the danger is ever present that damage will be done to the coil winding. The pneumatic devices which operate either with suction (negative pressure) or with positive air pressure have the advantage that they virtually preclude the possibility of any damage to the coil, and these devices can be used without difficulty for any desired coil core dimensions. It has been found, however, that there is no absolute assurance that the tip or foot bunch will be removed by suction or air pressure from all supply coils submitted thereto. Difficulties are encountered in the pneumatic removal of a tip or foot bunch when the thread is interlocked or entangled with adjacent threads or thread layers or is wound up with airborne dust. It is also possible that the core on which the tip or foot hunch is wound, has defects therein such as nicks or scratches in which the threads can be caught. In all such cases, there can be no assurance of reliable removal of a winding or bunch by means of pneumatic devices.

It is accordingly an object of my invention to provide device for pneumatically removing the tip or foot bunch from supply coils which affords an improvement over the heretofore known devices of this type so that it affords at least substantially the same reliability for removing the bunches as has been able to be achieved heretofore only by mechanical bunchremoving devices. More particularly, it is an object of my invention to provide such a pneumatic device that will exhibit the advantages both of the heretofore known pneumatic and mechanical devices while eliminating the disadvantages heretofore associated with these types of devices.

With the foregoing and other objects in view, I provide in accordance with my invention a device for pneumatically removing the tip or foot bunch from supply coils, which comprises means for disposing within an air current, a coil end wound with a bunch that is to be removed and a mechanical removing mechanism slidingly gripping the free end of the thread wound in the bunch intermittently or continuously and acting substantially in the direction of flow of the air current. Since a thread end is always exposed first when pneumatically removing the tip or foot bunch ofa supply coil, it is possible, in accordance with my invention, to seize this pneumatically exposed thread end, that may be very short, by means of the mechanical removing mechanism. The action of the air current is then assisted by the mechanical removing mechanism in such a way that the winding is removed even when the thread has been entangled within the winding or caught on the core for any reason whatever.

In accordance with more detailed features of my invention, my bunch-removing device comprises two rotary members that are at least nearly in engagement with one another. The

rotary members are located only so close to one another that the free end of the thread is slidingly caught but not pinched or wedged therebetween.

In accordance with an alternate feature of my invention, the thread is slidingly seized by sling-shaped gripping elements provided at the surface of the rotary members engaging with the thread so that the thread end can slide through these elements as for a rake-type tensioner.

In accordance with a further feature of my invention, means are provided for periodically bringing the rotary members into engagement either by a pivoting movement of one or of both of the rotary members or also by means of a suitable construction of the peripheral surface of the rotary members whereby the rotary members engage one another only at intervals and consequently intermittently grip the thread end.

In accordance with yet another feature of my invention, my device is adapted to clamp the thread end between the rotary members in order to maintain a continuous grip on the thread end.

Other features which are considered as characteristic for the invention are set forth in the appended claims.

Although the invention is illustrated and described herein as embodied in device for pneumatically removing the tip or foot bunch from supply coils, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims.

The construction and operation of the invention, however, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings, in which:

FIG. I is a diagrammatic elevational view of one embodiment of the device for pneumatically removing a tip or foot bunch from supply coils constructed in accordance with my invention;

FIG. 2 is a top plan view of FIG. ll;

FIG. 3 is a diagrammatic elevational view of another embodiment of the device of FIG. 1;

FIG. 4 is a top plan view of FIG. 3;

FIG. 5 is a diagrammatic elevational view of still another embodiment of the device of my invention;

FIGS. 6 and 7 are sectional views respectively taken along the lines VI-VI and VIIVII of FIG. 5 in the direction of the arrows;

FIG. 8 is a fragmentary view partly in section of a modified form of the embodiment of FIG. 5; and

FIG. 9 is a top plan view of a modification of the embodiment of FIG. 8 with a supply coil shown in cross section.

Referring now to the drawings and first particularly to FIGS. l and 2 thereof, there are shown a side-elevational view and a top plan view respectively of a device for pneumatically removing the foot bunch 2 of a spinning cop 1 which, in this embodiment, is advanced in a hanging position by gripping device 5 holding the cop at the tip thereof while the cop is disposed in a transporting pouch or pocket 4 secured to a moving conveyor belt 3. Reference may be had to U.S. Pat. No. 2,707,548 of S. Fiirst for further details of construction of such pockets and conveyor belt. Air jet nozzles 6 serve for removing the foot bunch 2, and a mechanical removing device in the form of two intermittently engaging rotational members is located in the air current from the nozzles 6 and seizes the free thread end 2a. In this embodiment of FIGS. 1 and 2, both rotary members are formed of two endless bands or belts 7 and it which are rotated by nonillustrated driving means in opposite rotary directions as indicated by the arrows 7a and 3a. The reversin roller 9 of the conveyor belt 8 is mounted for pivotal movement in the direction of the arrow db about the axis 10a of the other reversing roller ltll of this conveyor belt so that both conveyor belts 7 and 3 are intermittently engageable. The reversing roller 9 that is to be pivoted is provided with a mounting support at its axis ltla which is connected with a lever 11 pivotable in a clockwise direction by following a suitably driven rotary cam 12a of a cam plate 12 so as to effect intermittent engagement of both conveyor belts. Consequently, in the position of the band 8 in which it is pivoted out of engagement with the band 7, the air current is able to flow more easily through the location in which the bands 7 and 8 are otherwise in engagement.

It is of particular advantage that, in accordance with the embodiments of FIG. 1, both endless belts 7 and 8 are disposed in a V-shape and the end of the cop which has the bunch 2 that is to be removed is mounted between the belts 7 and 8. At least one of the belts 7 and 8 proper is advantageously provided with naps, burls, brushes 7' or the like. In the embodiment of FIGS. 1 and 2, the angle of inclination of band 7 or band 8 or of both can be so chosen that the effect of the jet air current emitted by the nozzle 6 can be reinforced by friction engagement of the brushes or the like of the conveyor belts 7 and 8 on the foot bunch 2. If desired, it is also possible only to have the naps, burls or brushes or the like of one of the conveyor belts engage the foot bunch 2 so that a separate air jet nozzle is not required at this location.

A flow discharge channel 13 which is located beneath the rotary members 7 and 8, advantageously serves for receiving the discharging air current from the nozzles 6. When the foot bunch 2 is completely removed, the steeply wound back winding la of the thread end on the periphery of the coil 1 is seized by the conveyor bands 7 and 8 so that this thread end must inevitable be torn off. The torn thread end can then be removed by being sucked into the air current discharge channel 13.

In FIGS. 3 and 4 there is shown substantially the same device as is shown in FIGS. 1 and 2, however, with the dif ference that instead of the endless belts 7 and 8 of the embodiment of FIG. 1, the rotary members of the embodiment shown in FIGS. 3 and 4 are formed of two rollers 15 and 16. A bunchremoval device consisting of two rotary members in the form of rollers has the advantage over the aforedescribed conveyor belt forms of the embodiment of FIGS. 1 and 2 in that it has a more simplified construction. The rollers 15 and 16 can slidingly grip the thread end 2a either intermittently or continuously. A sliding retention of the thread end is possible due to the fact that the rollers only lightly abut against one another. It is more advantageous for attaining a secure grip on the free thread end 2a that at least one of the rollers 15 and 16 be provided with recesses distributed on the periphery thereof. A form of such recesses is indicated in FIG. 3 by the reference characters 15 and 16. If the recesses 15' and 16' are greater in depth than the height of the projecting portions I" 16" of both rollers and 16, the thread can then be slidingly retained solely due to the tortuous path resulting from the meshing between the respective projecting portions of the rollers and the recesses thereof. It is also possible, however, to so arrange both rollers 15 and 16 with respect to one another that the thread is firmly pinched or wedged therebetween. It is equally possible to distribute the recesses I5 and I6 only on one portion of the periphery of the rollers as can be seen clearly in FIG. 3 so that the thread end is alternately drawn off slidingly or intermittently and continuously. In the embodiment of FIGS. 3 and 4, it can be advantageous for the purpose of avoiding slip or backlash between the rollers 15 and 16, that both of these rollers be operatively connected with one another. Also, in the embodiment of FIGS. 3 and 4, at least one of the two rotatable members can be mounted so that it is pivotable in a direction toward the other of the rotatable members. For this purpose, the axis 15a of the roller 15 in the embodiment of FIGS. 3 and 4 is mounted so as to be rotatable about the fixed axis 17 and is connected with the arm 11 which follows the rotatable cam disc 12. When the lever arm 11 rises up on the cam portion 12a of the disc 12, the roller 15 pivots in the direction of the arrow ISb so that the air current emitted from the nozzles 6 can pass more easily between the rollers 15 and I6.

As compared with the embodiment of FIGS. 1 and 2, it may be noted that in the embodiment of FIGS. 3 and 4 an additional air jet nozzle 18 is provided for the purpose of blowing down a thread end projecting out ofthe foot bunch 2 and lying on the surface of the coil, so that it can be reliably entrained in the air currents from the airjet nozzles 6. An additional airjet nozzle of this type can naturally also be employed with the embodiment of FIGS. 1 and 2.

There is furthermore also provided in the embodiment of FIGS. 3 and 4, a different suspension device for the cop than is provided in the embodiment of FIGS. 1 and 2. The suspension device of FIGS. 3 and 4 is formed of two holder members 19 and 20, the holder member I9 being mounted so that it is displaceable in the direction of the arrow 19a (FIG. 4), that is, in the direction in which the cops are conveyed, whereas the holder member 20 is mounted so that it is stationary with respect to the direction in which the cops are conveyed. The holder 19 is formed of a rotatably mounted endless belt or the like which is guided over two reversing rollers 23 so that it is displaceable in the cop-conveying direction.

When the core tip of the cop I is conveyed by the conveyor pocket 4 between the two holder members 19 and 20, the core tip is rigidly clamped so that the cop is thereafter conveyed in a suspended condition and the support at the foot of the cop, known for example from the aforementioned U.S. Pat. No. 2,707,548, can be pivoted away so as to permit reliable removal of the foot bunch.

Since the holder member 20 is stationary in regard to the direction of conveyance of the cops and only the holder belt 19 is mounted so that it is movable in the direction in which the cops are being conveyed, the cop l is caused to rotate. By means of this mounting of the cop so that it is rotatable about its longitudinal axis in the direction of conveyance thereof, the entire periphery of the cop is subjected to the action of the air jet nozzles 6 and 18 and consequently the thread end can be reliably removed even under difficult conditions.

Mounting the cops so that they are rotatable about their longitudinal axes can also be effected by other means, such as for example by means of one or more rotatable rollers or the like which engage the periphery of the cop or the core thereof, as has for example been described in U.S. Pat. No. 3,029,031, and more particularly as shown in FIG. 4 thereof. Such means can be used particularly advantageously when the cops are not suspended during the removal of the tip or foot bunch but rather are supported from below as shown in FIGS. 5 to 9 of the instant application and as described hereinafter. I

Further in regard to the embodiment of FIGS. 3 and 4, in order to permit a reliable clamping of coil cores having different diameters, the holder member 20 is oscillatingly mounted under the effect of a biasing force directed toward the axis lb of the cop. In the specific embodiment of FIGS. 3 and 4, the oscillatingly mounted holder member 20 is yieldably biased in a direction toward the cop axis lb by the action of a spring 22 located in the bushing 21. It is also possible, however, to swingingly suspend this holder member 20. The biasing force can also be supplied by a pneumatic or magnetic force instead of a spring force, and by suitably suspending the holder member 20, the force of its own weight can be employed as the biasing force.

In the further embodiment shown in FIGS. 5, 6 and 7, there is again provided a conveyor belt 3 which is mounted in the same manner as in the embodiments of FIGS. 1 to 4, with conveyor pockets 4 in which the cops l are guided. The rotary members in the embodiment of FIGS. 5 to 7 are again formed by two rollers 25 and 26 (FIG. 7) which are provided with recesses 25 and 26 distributed on their peripheral surface. However, the projecting portions of the rollers 25 and 26 are always disposed opposite one another at the substantially abutting location thereof as is clearly shown in FIG. 7 so that the thread end is drawn off intermittently. The conveyor device of the cops l in the embodiment of FIGS. 5 to 7, in the same manner as in the embodiments of FIGS. 1 to 4, moves in the direction of the rotary axes 25a and 26a of the rollers 25 and 26. In the embodiment of FIGS. 5 to 7, however, the cops I are not guided in suspended condition into the vicinity of the bunch-removing device but, rather, cop-supporting spacer rods 29 and 29 of advantageously circular cross section are located between the cops l and the bunch-removing device.

As soon as the cops i, which are initially held in the conveyor pockets t by supporting flaps located beneath the pockets in a manner known for example from the aforementioned U.S. Pat. No. 2,707,548, reach the vicinity of the bunch'removing device, the supporting flap is then pivoted in a manner such as is disclosed for example in the aforementioned U.S. Pat. No. 2,707,548, so that the cops fall onto the downwardly bent entering end portions 28a of the supporting rods 28. The cops then slide upwardly on the supporting rods and are thus guided further over the bunch-removing devicev Before the cops 11 slide off the supporting rods 28, 29 at the end of the bunch-removing device, the aforementioned nonillustrated foot flaps of the conveyor pockets t are again raised so that the cops can fall onto and be supported by the foot flaps.

The advantage of the supporting rods 28, 29 over the suspended guidance of the cop ll in accordance with the embodiment of FIGS. 1 to l, is its structural simplicity thereover. The disadvantage of the supporting rods 28, 29 consists, how ever, in that the thread end 2a which is llown off at the end of the cop can become twisted in the form of a loop or the like around the supporting rods 28 or 29, under adverse conditions. This disadvantage can be minimized, however, when the supporting rods are given a circular cross section and also if the supporting rods are inclined from the left-hand side to the right-hand side, as viewed in FIG. 5, so that the thread can be blown by the air current flowing out of the nozzles 6 in a direction toward the rollers and 26 and can be thereafter gripped by the rollers 25 and 2d and drawn off.

To facilitate the blowing off of the upper or lower windings, i.e., the tip or foot bunch, as well as to prevent thread loops from being wound around the supporting rods 28 and 29, it can be of advantage if the supporting rods are mounted so that they are displaceable transversely to the direction of movement of the cops so that the bearing surface on which the cop cores are supported can be changed continuously. Such a mounting of the supporting rods is shown in enlarged view in FIG. 8. Both support rods 28 and 29 are shown having a common mounting member 35 which can be suitably pivoted about the axis 36 in either direction of the double-headed arrow 350. An eccentrically mounted pin 38 rotatable about a fixed axis 37 and slidably movable in a slot 351; of the mounting member 35 suitably serves for pivoting the mounting member 35 so as to displace the supporting rods 28 and 29 transversely to the conveying direction of the cops.

Another means for removing the thread loops or the like which, as aforementioned, sometimes tend to wrap around the supporting rods 28 and 29, is to provide supporting rods which, separately or in combination with the movable mounting of the supporting rods shown in FIG. 8, are clamped together at only one end thereof. An embodiment for such an arrangement is shown in FIG. 9 which is a top plan view of a modification of FIG. it and showing in section the foot of the core ofthe cop I. As can be readily noted, the supporting rods 28 and 29 are clamped together only at one end in the mounting member 35. Consequently, any thread wrapped around the supporting rods 28 and 29 in the form of a loop or the like, slides off the free ends 28a and 29a of the respective rods and can be gripped without difficulty by the bunch-removing device.

To remove the thread loops or the like, it is also advantageous, according to the aforedescribed embodiments, if the supporting rods 28 and 29, contrary to the schematic showing in FIG. 6, do not uninterruptedly extend over the entire length of the bunch-removing device, but rather consist of several supporting rods connected so that they are slightly spaced from one another. The thread can then slide off the free end 28a, 29a of a supporting rod 23, 29 and can be seized by the bunch-removing device. A particularly advantageous embodiment for this purpose is shown in FIG. 9 wherein the supporting rods 29 and 29' are mutually connected with a slight spacing to the supporting rods 28 and 29. These supporting rods 29' and 29' are shown in the embodiment ofFIG. 9 as being clamped on one side by the mounting member 35 together with the rods 28 and 29. In this manner, the supporting rods 28 and 29 are able to be pivoted back and forth transversely to the direction of movement of the cops by means of the aforementioned pivoting motion of the support member 35 hereinbefore described in relation to FIG. 8. In many cases it will be sufficient, however, to fixedly mount the support rods 28' and 29 separated from the rods 28 and 29.

To facilitate the entry of the thread. end 20 between the rollers 25 and 26, the air current discharge channel i3 which at least partly surrounds the bunch-removing device in the direction of movement of the conveyor belt3, as indicated by the arrow 3a, is slightly curved so that the illustrated current passage for the air jet flow is produced. It is furthennore espe cially advantageous when inserting the thread between the rollers 25 and 26, that the rollers, at least at their end 2612 (FIG. 5) directed opposite to the direction of movement 3a of the conveyor apparatus, have a conical construction, it being sufficient possibly to provide only one of the rollers 26 with the conical shape. It is furthermore noted that the recesses 26 extend from the conical rolier end only along a portion of the length of the roller so that the gripped thread end is drawn off intermittently at first, and continuously thereafter. The intermittent drawing off of the thread end has the advantage that the air jet current can be guided more effectively between the rollers 25 and 26 and the thread end 20 can also therefore be guided reliably. This reliable guidance of the thread can be assisted in an advantageous manner by locating additional blower nozzles 30, 31 within the current discharge channel 13 for acting upon the thread end extending out of the bunchremoving device 25, 26. By suitable arrangement of these nozzles 3t), Bl and advantageous construction of the current discharge channel 13, for example in the manner indicated in FIG. 7, a type of injection effect can be achieved which prevents the thread end from looping around or getting caught on the rollers 25, 26. In addition, an advantage is afforded by the fact that the blower nozzles 6 are directed toward the tip or foot bunch in the direction 3a of conveyance of the cops ll only in front of the bunch-removing device 25, 26, and the auxiliary nozzles 30, 31 are located only in the vicinity of the bunch-removing device so that an even more reliable passage of air into the air current discharge channel is obtained. In many cases, the location of a special air suction current at the current discharge channel I3 becomes superfluous. A known severing device 39 can be located at the end of the bunch removing device for severing the freely readied thread ends.

The various schematically shown embodiments clearly indicate that in accordance with the basic concept of the invention of the instant application it is possible, in a relatively simple manner, to remove the tip or foot bunch from supply cops reliably with pneumatic means, whereby the advantages afforded by the pneumatic means as against the purely mechanical stripping means, are able to be attained. Obviously, the invention of this application is not to be considered to be limited only to the embodiments disclosed herein. For example, the forced air current issuing from the nozzles 6, llfi and 3t), 31, can be replaced by an air suction or negative pressure current produced from the current discharge channel 113. It is also not required that the cops whose tip or foot bunch is to be removed should be conveyed by means of a rotary conveyor belt over the bunch-removing device, but rather, the cops can also, in heretofore ltnown manner, he removed individually from a supply container or magazine and delivered to the bunch-removing device automatically or by hand. it is furthermore possible to mount the cops obliquely or horizontally to the direction of conveyor movement instead of the hereinaforedescribed perpendicular mounting of the cops.

Iclaim:

ll. Device for pneumatically removing the tip or foot bunch from supply coils comprising means for producing an air current in a given flow direction, means for disposing a supply coil so that its axis extends generally in said given flow direction and so that an end of the supply coil, on which a bunch that is to be removed is wound, is engageable by the air current for exposing a thread end in the bunch, mechanical removing mechanism for slidingly seizing the thread end and drawing it off in the flow direction of the air current, said mechanical removing mechanism being axially spaced from said supply coil end-disposing means and from the end of a supply coil disposed within an air current by said coil enddisposing means, and means for mounting the supply coil so that it is rotatable about its longitudinal axis.

2. Device for pneumatically removing the tip or foot bunch from supply coils comprising means for producing an air current in a given flow direction, means for disposing a supply coil so that its axis extends generally in said given flow direction and so that an end of the supply coil, on which a bunch that is to be removed is wound, is engageable by the air current for exposing a thread end in a bunch, and mechanical removing mechanism for slidingly seizing the thread end and drawing it off in the flow direction of the air current, said mechanical removing mechanism being axially spaced from said supply coil enddisposing means and from the end of a supply coil disposed within an air current by said coil enddisposing means, said mechanical removing mechanism comprising two rotary members having peripheral surfaces at least nearly in engagement with one another, said rotary members being endless bands.

3. Device according to claim 2 wherein at least one of said endless bands is provided with friction-engaging means.

4. Device according to claim 3 wherein said friction-engaging means are naps.

5. Device according to claim 3 wherein said friction-engaging means are brushes.

6. Device according to claim 2 wherein said endless bands are disposed relative to one another in the form of a V.

7. Device according to claim 6 wherein the end of the supply coil is mounted between said endless bands.

8. Device for pneumatically removing the tip or foot bunch from supply coils comprising means for disposing within an air current the end of a supply coil wound with a bunch that is to be removed so that a thread end in the bunch is exposed, mechanical removing mechanism for slidingly seizing the thread end and drawing it off in the flow direction of the air current, said mechanical removing mechanism comprising two rotary members having peripheral surfaces at least nearly in engagement with one another, movable conveyance means wherein the supply coil is mounted, said conveyance means and the supply coil mounted therein being movable in the direction of the rotary axes of said rotary members, and a pair of spaced holder members extending along the entire length of said mechanical removing mechanism, said holder members gripping the supply coil therebetween at the end thereof opposite to the end wound with the bunch that is to be removed.

9. Device according to claim 8 wherein one of said holder members is displaceable in the conveyance direction of the supply coil.

10. Device according to claim 9 wherein said displaceable holder member comprises a pair of reversing rollers mounted spaced from said mechanical removing mechanism, and and endless band rotatably mounted on said reversing rollers.

11. Device according to claim 8 including means for oscillatingly biasing at least one of said holder members in a direction toward the longitudinal axis of the supply coil.

Claims (11)

1. Device for pneumatically removing the tip or foot bunch from supply coils comprising means for producing an air current in a given flow direction, means for disposing a supply coil so that its axis extends generally in said given flow direction and so that an end of the supply coil, on which a bunch that is to be removed is wound, is engageable by the air current for exposing a thread end in the bunch, mechanical removing mechanism for slidingly seizing the thread end and drawing it off in the flow direction of the air current, said mechanical removing mechanism being axially spaced from said supply coil end-disposing means and from the end of a supply coil disposed within an air current by said coil end-disposing means, anD means for mounting the supply coil so that it is rotatable about its longitudinal axis.

2. Device for pneumatically removing the tip or foot bunch from supply coils comprising means for producing an air current in a given flow direction, means for disposing a supply coil so that its axis extends generally in said given flow direction and so that an end of the supply coil, on which a bunch that is to be removed is wound, is engageable by the air current for exposing a thread end in a bunch, and mechanical removing mechanism for slidingly seizing the thread end and drawing it off in the flow direction of the air current, said mechanical removing mechanism being axially spaced from said supply coil end-disposing means and from the end of a supply coil disposed within an air current by said coil end-disposing means, said mechanical removing mechanism comprising two rotary members having peripheral surfaces at least nearly in engagement with one another, said rotary members being endless bands.

3. Device according to claim 2 wherein at least one of said endless bands is provided with friction-engaging means.

4. Device according to claim 3 wherein said friction-engaging means are naps.

5. Device according to claim 3 wherein said friction-engaging means are brushes.

6. Device according to claim 2 wherein said endless bands are disposed relative to one another in the form of a V.

7. Device according to claim 6 wherein the end of the supply coil is mounted between said endless bands.

8. Device for pneumatically removing the tip or foot bunch from supply coils comprising means for disposing within an air current the end of a supply coil wound with a bunch that is to be removed so that a thread end in the bunch is exposed, mechanical removing mechanism for slidingly seizing the thread end and drawing it off in the flow direction of the air current, said mechanical removing mechanism comprising two rotary members having peripheral surfaces at least nearly in engagement with one another, movable conveyance means wherein the supply coil is mounted, said conveyance means and the supply coil mounted therein being movable in the direction of the rotary axes of said rotary members, and a pair of spaced holder members extending along the entire length of said mechanical removing mechanism, said holder members gripping the supply coil therebetween at the end thereof opposite to the end wound with the bunch that is to be removed.

9. Device according to claim 8 wherein one of said holder members is displaceable in the conveyance direction of the supply coil.

10. Device according to claim 9 wherein said displaceable holder member comprises a pair of reversing rollers mounted spaced from said mechanical removing mechanism, and an endless band rotatably mounted on said reversing rollers.

11. Device according to claim 8 including means for oscillatingly biasing at least one of said holder members in a direction toward the longitudinal axis of the supply coil.

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