US2869796A - Winding device for spooling machines, especially for synthetic threads - Google Patents

Description

. w. A. KCNIG 2,869,796 WINDING DEVICE FOR SPOOLING MACHINES, ESPECIALLY Jan. 20, 1959 FOR SYNTHETIC THREADS 5 Sheets-Sheet 1 Filed Aug. 1, 1955 mif 2/54 (yew? Jan. 20, 1959 w. A. KCSNIG 2,869,796

WINDING DEVICE FOR SPOOLING MACHINES, ESPECIALLY FOR SYNTHETIC THREADS Filed Aug. 1, 1955 25 Sheets-Sheet 2 FIG. 2

' Jan. 20, 1959 w. A KGNIG 2,869,796

' WINDING DEVICE. FOR SPOOEJING MACHINES, ESPECIALLY FOR SYNTHETIC THREADS Filed Aug. 1. 1955 5 Sheets-Sheet 3 v United States Patent r WINDING DEVICE 1 0R SPUOLING MACHINES,

8 Claims. (Cl. 242-355) With the heretofore known winding devices associated with spooling machines, especially for synthetic fibers such as Perlon spooling machines, the freshly spun thread is passed over preparing rollers and tension rollers and wound upon a sleeve which is pressed against a driving roller so that the cop being formed is being driven by frictional force at the circumference thereof. The bobbin carrying bobbin holder is located on one end of a tiltable lever the axis of which is parallel to the axis of rotation of the driving roller, while the other end of said tiltable lever supports a counter weight so that the bobbin weight is substantially balanced.

Experience has shown that it is extremely difficult with a winding machine in which a plurality of individual cops are driven by a driving roller common to them, to obtain completely uniform pressure of all bobbins against the driving roller by corresponding adjustment of the counter weights. The precise uniformity of the pressure against all cops is, however, of great importance if it is desired to maintain the same spinning quality for all threads produced on the spooling machine.

Furthermore, it has proved necessary to vary the pressure of the cops against the driving roller according to the increasing winding diameter in conformity with a function to be ascertained empirically, if optimum quality is to be obtained for the threads to be produced. The heretofore known arrangement of the bobbin holder on tiltable levers, however, allows an unsatisfactory control of the pressure of the cops against the driving roller. This is due to the fact that the actually occurring pressure is affected by the change in the position of the tiltable lever in conformity with the increasing winding diameter so that the said pressure due to the structural arrangement of this system can be varied only within rather narrow limits. On the other hand, the increasing weight of the bobbin will due to the increasing winding diameter produce a change in the pressing force which is difficult to control and in most instances is directed opposite to the desired change in pressure.

Finally the employment of tiltable levers requires relatively much space because its arrangement is tied up to the direction of the force of gravity, and causes almost infeasible dimensions of the spooling stations if two bobbins are to be arranged one above the other.

it is, therefore, an object of the present invention to provide a winding device for spooling machines, especially for synthetic fibers, which will overcome the above mentioned drawbacks.

It is another object of this invention to provide a winding device for spooling machines, which will make it possible without increasing the overall dimensions of the spooling machine to arrange thereon an increased number of bobbins While being able to produce precisely uniform pressures for all cops.

It is still another object of a winding device for spooling machines which will make it possible to vary the pressing force against the cops to a desired extent in conformity with the winding diameter this invention to provide or other influential factors such as time, winding speed, denier etc. and to do this within wide limits according to the actual requirements and independently of the increasing weight of the cop.

It is a still further object of this invention to provide a winding device for spooling machines according to the preceding paragraphs, which will result in a simplified operation during breakage of the thread and during the exchange of the bobbins, which is of particular importance when high spinning speeds are involved.

These and other objects and advantages of the invention will appear more clearly from the following specification in connection with the accompanying drawings, in which: i i

Fig. 1 is a side view of a spooling machine with a winding mechanism according to the present invention.

Fig. 2 is a portion of a front view of the spooling machine of Fig. 1.

Fig. 3 is a side view, partly in section of the winding device according to Fig. 1 shown on a scale somewhat larger than the scale of Figs. 1 and 2.

Fig. 4 represents a section taken along the line IV-IV of Fig. 3.

Fig. 5 is a partial side view of the winding mechanism corresponding to Fig. 3.

Fig. 6 is a top view, partly in section, of a bobbin in tilted-outposition;

Fig. 7 is a horizontal section through a bobbin in working position. i f

Fig. 8 represents a section taken along the line VIII-VIII of Fig. 7.

Fig. 9 is a section taken along the line IX--IX of Fig. 6.

Fig. 10 is alsection taken along the line X-X of Fig. 5.

General arrangement The characteristic feature of the present invention consists in that the bobbin holders are displaceable in horizontal direction perpendicular to the axis of the driving roller and parallel to each other, and that the cops are pressed at uniform pressure against the driving roller. The pressing force may be produced by a weight which simultaneously acts upon a plurality of bobbin holders, While means are provided adapted to uniformly distribute the common weight load upon the individual bobbin holders. Due to the arrangement that the bobbin holders are displaceable parallel to each other, it is possible, by employing only few structural elements, to arrange the bobbins in pairs with the bobbins of each pair arranged one abovethe other, without having to increase the dimensions of the machine. Furthermore, the pressing force of the cops against the driving roller becomes sibility is obtained to uniformly adjust the pressing force for all cops. This uniformity is also furthered by the uniform distribution of the pressing force exerted simultaneously upon a plurality of bobbin holders by a weight common thereto. The uniform distribution of the weight load over a plurality of cops can be effected by intercom necting each two bobbins by means of a flexible pulling means on which the weight acts through the intervention of a loose roller. It is, of course, understood that also a rigid lever could be employed upon which the common force would act at the center thereof.

In order-to vary the magnitude of the force exerted upon each bobbin holder, according to the: present invention, when employing a flexible pulling means, the deviating rollers for deviating the pulling means may be adjustable in the machine frame to such an extent that the direction of the pulling means strand between each bobbin holder and the deviating, rollers pertaining thereto,

and thus the direction of the forceacting upon the bobbin holder may be varied. Due to the fixed direction of movement of the bobbin holders, only a partial component of the pulling force becomes effective when the direction of the pulling force is changed. The desired course of the change in the pressing force can be effected by providing means for adjusting the deviating rollers in, conformity with the time, the winding diameter of the cops, or other variable factors. The bobbin holders are preferably journalled in parallel. guides and provided with releasable ratchet mechanisms by means of which the bobbin holders which. are manually returned against the pressing direction are maintained in a position in which the completed cops no longer contact the driving roller. It, is furthermore advantageous to provide the parallel guides with an abutment by means. of which in the latched position of the bobbin, a brake built into the bobbin is actuated so' that the cops are braked in the latching position of the bobbin holders. In order to reduce the frictional forces, preferably the bobbin holders are journalled in their parallel guides by means of anti-friction bodies such as ball guides. The narrow arrangement of the bobbins can be obtained by making each parallel guide with the respective bobbin holder and cop tiltable about an axis which is perpendicular to the direction of dis placement of the bobbin and to the axis of rotation of the driving roller. Furthermore, a handle with a releasable arresting mechanism is provided for tilting out the parallel, guid. The. said arresting mechanism is adapted to arrest the parallel guide in its two end positrons. The arresting mechanism may be so designed that the axis of rotation of the bobbin is adjustable in a parallel manner with regard to the axis of rotation of the drivlng roller. This can be obtained by incorporating 1n the arresting mechanism a conical pin which is arranged. on one. of the parts which can be tilted against being displaceable. in axial direction.

cone-shaped bores arranged in the other part, at least one of the cone-shaped bores being displaceable and adustable in a supporting member in the direction of the tilting movement.

In order further to sim lit the o holder may be provided w ith piaratlon the bobbm through a lever system for the arranged cam member ma be r actuatmg said lever system during theti'l t ing gciib ii g f h parallel guide. This cam member may be so arranged loosely mounted on the bobbin holder when the bobbin occupies its tilted-out position required for the bobbin exchange, whereas the bobbin is fixedly clamped to the bobbin holder'when it' occupies its workmgpos tion. Finally a mutual blocking of the ratchet mechanism and arresting mechanismmay be provided thereof. In each bobbin field of such a machine for instance four threads 1, 2, 3 and 4 running side by side are wound upon four individual bobbins-over two preparing discs 5 and 6 and tension rollers 7 and 8. Fig. 1 shows two bobbins 9and 10 only which are arranged above each other. Fig. 2 clearly shows the course taken by the threads. More specifically, the threadsfltand 2 pass over a reciprocating threadguide: v3.1 to said two bobbins 9 and 10 not shown intFig. 2, whereas the threads 3, and 4 by a second reciprocating thread guide 12 are passed to another pair (not shown in Fig. 2) of bobbins arranged above each other. The two bobbin pairs are located closely adjacent each other and are driven in common by a driving roller 13 the circumferential speed of which corresponds to the desired winding speed. The thread 1 is wound upon the upper bobbin 9, and the thread 2 is wound upon the lower bobbin 1%). The direction of rotation of the driving roller 13 and of the bobbins 9 and id is indicated in Fig. 1 by arrows. The bobbins 9 and it] are rotatably journalled on bobbin holders 14 and respectively which in their turn are connected to guiding plates 16, 17 (Fig. 3) which are displaceable parallel to each other. Each of said guiding plates 16 and It? has connected thereto one end of a rope or cable 13 which passes over deflecting rollers or pulleys l9 and 2d and is tensio-ned by means of a loose roll or pulley 2'1 and a weight 22 connected to said pulley 21. The pulleys i9 and 2d are supported by guiding members 23 and 24 which by means of a threaded spindle 25 with counter running thread 26 and 27 may be moved upwardly and downwardly as indicated by the arrows 28 and 2d. The spindle 25 is as shown in Fig. 1 rotated by an electric reversible motor 31 through the intervention of a bevel gear transmission 30. The guiding plates in, i7 supporting the bobbin holders with the bobbins, are displace ably journalled in parallel guides 32 by means of ball guides 33. The guiding plates 16 and 17 have at the rear end thereof means 34 such as a handle by means of which the guiding plates can be retracted. The manual handling can, of course, also be replaced by mechanical means for instance a hydraulic device, electromagnets or the like. As shown in Fig. 5, when the guiding plates 16, I! are moved into their completely retracted position, they are retained in said fully retracted position by means of a pawl and pin mechanism adapted to be released and comprising a pawl 35 and a stud 36. The parallel guiding means 32 are furthermore provided with an abutment 37 adapted to be engaged by the free end 39 of a brake band 38 as this is shown clearly in Figs. 8 and 9. The parallel guides 32 may by means of a handle 44? be tilted about studs all from a working position into a position expedient for the exchange of the bobbins. The studs 4% are arranged perpendicular to' the axis of rotation of the driving roller 13. The handle 40 which is tiltable about a pin 42 against the thrust of a spring 43 is provided with a cone-shaped pin 44 which in the working position of the bobbins latches into a cone-shaped bore 45 (Fig. 4) and when in tilted-out position latches into a conical bore 46.

The cone-shaped bore 45 is arranged in a supporting member 4? as shown in Fig. 4. The supporting member 49 is mounted in the machine frame 48 and by means of screws 4-7 is displaceable and adjustable preferably in the direction of the tilting movement of the parallel guiding means 32. The cone-shaped bore 46, on the other hand, is directly arranged in the machine frame.

The handle 40 is furthermore provided with a pin 50 which slides on the upper surface 51 of an arresting plate 52 mounted on the guiding plates 16 and 17, until the guiding plate has reached its latching position. The arresting plate 52 has a passage 53 adapted to be engaged by the pin 59 when the guiding plate is in its latching position and the lever 40 is depressed. The cone-shaped bore 4-6 for receiving the cone-shaped pin 4 is shallower than the cone-shaped bore 45 so that the handle 4% when occupying its tilted-out position cannot completely return to its normal position as a result of which the pin 50 remains in engagement with the bore or passage 53 of the arresting plate 52..

Each bobbin holder 14 and. 15 comprises a tube 54 connected to the guiding plate 16' and 17 respectively and having rotatively journalled thereon a sleeve 57 by means of ball bearings 5'5 and 56. That end of the sleeve 57 which faces the guiding plate is designed as brake drum 58. Mounted on-thesleeve 57 are furthermore slotted cup springs for instance annular clamping discs, and an intermediate member 60, whereas a rod 61 is longitudinally displaceable in the interior .of the tube 54. When the rod 61 is displaced in the direction toward the free end of the bobbin holder, a pressure cap 64 is displaced through the intervention of a ball 63 against the thrust of the cup springs 62. As a result thereof, the slotted cup springs 59 can assume a greater conical inclination whereby the outer diameter 65 thereof decreases and the bobbin 9 or 10 becomes loose and can be slipped over the slotted cup springs 59. When the rod 61 is released, the cup springs 62 displace the pressure cap 64 in opposite direction so that the slotted cup springs 59 are pressed fiat. As a result thereof the outer diameter of said springs 59 is increased and the newly slipped-on bobbin 9 or 10 is clamped fast to the bobbin holder. A cam member 66 is so mounted on the machine frame 48 that the end 67 of the rod 61, which end protrudes from the bore of the tube 54 can engage the cam member 66 when the guiding plate (16, 17) carrying the bobbin carrier occupies its latching position. The cam member 66 is so shaped that when the parallel guiding means 32 is tilted from its working position into the tilted-out position, the rod 61 is moved by the cam member 66 in the direction toward the free end of the bobbin holder. As a result thereof, the bobbin 9 (10) supported by the bobbin holder becomes loose and can then be removed therefrom.

l The winding device according to the invention operates as follows. During the winding process, the bobbins 9 and 10 are circumferentially driven by the driving roller 13. In this way, the thread 1 moved. back and forth by the thread guide 11 winds upon the upper bobbin 9, and the thread 2 simultaneously guided by the same thread guide 11 winds upon the lower bobbin 10. By means of the Weight 22, the bobbins are pressed against the drivlug shaft, while care is being taken by the loose roll 21 that the pressing forces of the two bobbins will be precisely the same.

With increasing winding diameter, the bobbin center points together with the guiding plates 16 and 17. carrying the bobbin holders move away from the driving roller while they are guided by the parallel guiding means 32. Consequently, with the load produced by the weight 22 remaining the same and with the pulleys 19 and 20 arranged stationarily, the pressure exerted by the bobbins 9 and 10 upon the driving roller 13 decreases, while the angle between the direction of the cable or rope force and the direction of the pressing force becomes smaller. If during the winding process the threaded spindle 25 is additionally rotated, the guiding members23 and 24 carrying the pulleys 19 and 20 are displaced for instance in the direction of the arrows 28 and 29. As a result thereof, the direction of the rope or cable force Z is changed so that a further decrease in the pressure can be obtained with increasing winding diameter. In this connection it is assumed that at thebeginning of the winding process, the rope force Z as shown in Fig. 3 acts in the direction of movement of the guiding plates 16, 17. Fig. 5 shows the changed direction of the rope or cable force Z near the end of the winding operation. When the cop on the bobbins has been completely formed, the guiding plate is completely retracted by means of the handle 34 while the latching device 35, 36 moves into its locking position and retains the guiding plate in a position in which the filled bobbin will not contact any longer the driving shaft. At the same time, the free end 39 of the brake band 38 has contacted the abutment 37 on the parallel guiding means (Fig. 9) whereby the bobbin is braked to a stop.

Furthermore, the arresting plate 52 connected to the guiding plate 16, 17 has moved backwardly to such an extent that the pin 50 can now engage the recess 53 when the handle 40 is depressed. As a result thereof,

the arresting device consisting of the cone-shaped-piu 44 and the cone-shaped bore 451s released so that the parallel guiding means together with the guiding plate 16, 17, the bobbinholder, and the bobbin can be tilted into the Fig. 6 position. In this position, the coneshaped pin 44 engages the cone-shaped bore 46. Since, however, the cone-shaped bore 46 has less depth than the cone-shaped bore 47, the handle 40 can due to the spring 43 not return completely to its normal position so that the pin 50 remains sunk in the bore 53 of the arresting plate 52. In this way, the guiding plate 16, 17 cannot move even when the latching mechanism 35, 36 is released. By withdrawing the guiding plate to its latching position, the end 67 of the rod 61 contacts the cam member 66 fixedly arranged in the machine frame 48. During the tilting movement of the parallel guiding means, the cam member 66 has displaced the rod 61 in the direction toward the free end of the bobbin holder 14, 15 so that the clamping connection between the bobbin holder and the bobbin is released and subsequently the completely filled bobbin can be taken olf the bobbin holder and be replaced by an empty bobbin. When tilting the parallel guiding means back into its working position, the newly slipped-on bobbin will automatically clamp fast to the bobbin holder. After the cone-shaped pin has latched into the deeper bore 45, also the handle 40 can return into its normal position so that following the release of the latching mechanism 35, 36, the bobbin is brought again to rest against the driving roller. The cone-shaped bore 45 is arranged in a separate. supporting member 49 which by means of the screws 47 is displaceable in the machine frame in the direction of the tilting movement in such a manner and can be adjusted so that the axis of rotation of the bobbin is parallel to the axis of rotation of the driving roller.

In order to keep the drawings as simple and clear as possible, the releasable latching mechanism 35, 36, the arresting mechanism 44, 45, 46, and the mutual blocking of the two devices as well as the arrangement for displacing the deviating pulleys are shown diagrammatically only.

It is, of course, understood that the present invention is, by no means limited to the particular construction shown in the drawings but also comprises any modifications within the scope of the appended claims.

What I claim is:

1. In a winding device for spooling machines, the combination of: a plurality of bobbin holders arranged in pairs with the two bobbin holders of each pair mounted one above the other, each of said bobbin holders being adapted selectively to support a bobbin for winding a cop thereon or to release said bobbin to allow removal thereof from the respective bobbin holder, a plurality of driving rollers respectively associated with each pair of bobbin holders and arranged for frictionally engaging the cops being formed on said bobbins and to rotate the latter with said cops, a plurality of slide means respectively supporting said bobbins, parallel guiding means respectively guiding said slide means for displacement thereof in horizontal direction and perpendicular to the driving axis of the respective driving rollers pertaining to each pair of said bobbin holders, pressing means operatively connected to said slide means for each pair of bobbins for simultaneously acting upon the same to uniformly press the cops respectively supported thereby against the respective driving roller pertaining thereto, and latching means respectively associated with said slide means and operable in response to a movement of said slide means away from said driving roller pertaining thereto into a certain position to lock the respective slide means in a position in which the respective completed cop supported by the slide means perv 7. r taining thereto is spaced from the respective cooperating driving roller.

2. A winding device'according to claim 1, which includes brake means respectively arranged within said bobbins, and also includes abutment means supported by said parallel guiding means responsive to the movement of the respective slide means into said certain position to act upon said brake means for causing the latter to brake said bobbin holder,

3. In a winding device for spooling machines, the combination of: a plurality of bobbin holders arranged in pairs with the two bobbin holders of each pair mounted one above the other, each of said bobbin holders being adapted selectively to support a bobbin for winding a cop thereon or to release said bobbin to allow removal thereof from the respective bobbin holder, a plurality of driving rollers respectively associated one with each pair of bobbin holders and arranged for frictionally engaging the cops being formed on said bobbins and to rotate the latter with said cops, a plurality of slide means respectively supporting said bobbins, parallel guiding means respectively guiding said slide means for displacement thereof in horizontal direction and perpendicular to the driving axis of the respective driving rollers pertaining to each pair of said bobbin holders, Shaft means respectively associated with each of said parallel guiding means and pivotally supporting the same to allow said parallel guiding means together with the respective bobbin holder and bobbin to turn as a unit about the respective shaft means, said shaft means respectively extending perpendicular to the direction of movement of the bobbin holders and the axis of rotation of the respective driving roller, and means operatively connected to a plurality of said slide means for simultaneously acting upon the same to uniformly press the cops respectively supported thereby against the respective driving roller pertaining thereto.

4. In a winding device for spooling machines, the combination of: a plurality of bobbin holders arranged in pairs with the two bobbin holders of each pair mounted one above the other, each of said bobbin holders being adapted selectively to support a bobbin for winding a cop thereon or to release said bobbin to allow removal thereof from the respective bobbin holder, a plurality of driving rollers respectively associated one with each pair of bobbin holders and arranged for frictionally engaging the cops being formed on said bobbins and to rotate the latter with said cops, a plurality of slide means respectively supporting said bobbins, parallel guiding means respectively guiding said slide means for displacement thereof in horizontal direction and perpendicular to the driving axis of the respective driving rollers pertainin to each pair of said bobbin holders, shaft means respectively associated with each of said parallel guiding means and pivotally supporting the same to allow said parallel guiding means together with the respective bobbin holders and bobbin to turn as a unit about the respective shaft means, said shaft means respectively extending perpendicular to he direction of movement of the bobbin holders and the axis of rotation of the respective driving roller, manually operable means respectively associated with said parallel guiding means for turning said parallel V guiding means about said shaft means from a first position into a second position and vice versa, locking means associated with .said manually operable means for respectively and selectively locking the respective parallel guiding means in said first or said second position, and means operatively connected to a plurality of said slide means for simultaneously acting upon the same to uniformly press the cops respectively supported thereby against the respective driving roller pertaining thereto.

5. A winding device according to claim 4, in which said locking. means includes an adjustable member provided with a bore adapted to be engaged by a pin connected to more 8 7 said manually operable means, said adjustable member being adjustable for cooperation with said pin so that the axis of rotation of the bobbins remains parallel to the axis'of rotation of the driving roller.

6. In a winding device for spooling machines, the combination of: a plurality of bobbin holders arranged in pairs with the two bobbin holders of each pair mounted one above the other, each of said bobbin holders being adapted selectively to support a bobbin for winding a cop thereon or to release said bobbin to allow removal thereof from the respective bobbin holder, a plurality of driving rollers respectively associated one with each pair of bobbin holders and arranged for frictionally engaging the cops being formed on said bobbins and to rotate the latter with said cops, a plurality of slide means respectively supporting said bobbins, parallel guiding. means respectively guiding said slide means for displacement thereof in horizontal direction and perpendicular to the driving axis of the respective driving rollers pertaining to each pair of said bobbin holders, shaft means respectively associated with each of said parallel guiding means and pivotally supporting the same to allow said parallel guiding means together with the respective bobbin holder and bobbin to turn as a unit about the respective shaft means, said shaft means respectively extending perpendicular to the direction of movement of the bobbin holders and the axis of rotation of the respective driving roller, manually operable means respectively associated with said parallel guiding means for turning said parallel guiding means about said shaft means from a first position into a second position and vice versa, locking means associated with said manually operable means for respectively and selectively locking the respective parallel guiding means in said first or said second position, said locking means comprising a relatively stationary part and a tiltable part, one of said last mentioned two partsbeing provided with a cone-shaped pin, and the other of said two parts being provided with two spaced bores for en gagement by said cone-shaped pin, at least one of said cone-shaped bores being provided in a supporting member displaceable and adjustable in the tilting direction ofsaid tiltable part, and means operatively connected to'a plurality of said slide means for simultaneously acting upon the same to uniformly press the tops respectively supported thereby against the respective driving roller pertaining thereto.

7. In a winding device for spooling machines, the combination of: a plurality of bobbin holders arranged in pairs with the two bobbin holders of each pair mounted one above the other, each of said bobbin holders being adapted selectively to support a bobbin for winding a cop thereon or to release said bobbin to allow removal thereof from the respective bobbin holder, a plurality of driving rollers respectively associated one with each pair of bobbin holders and arranged for frictionally engaging the cops being formed on said bobbins and to rotate the latter with said cops, a plurality of slide means respectively supporting said bobbins, parallel guiding means respectively guiding said slide means for displacement thereof in horizontal direction and perpendicular to the driving axis of the respective driving rollers pertaning to each pair of said bobbin holders, clamping means respectively arranged in said bobbins for clamping the bobbins to said bobbin holders, rod means within said bobbin holders for actuating said clamping means,

fixed cam means operable to actuate said rod means in response to a predetermined tilting movement of said bobbin holders to release said clamping means for removal of the respective bobbin, and means operatively connected to a plurality of said slide means for simultaneously acting upon the same to uniformly press the cops respectively supported thereby against the respective driving roller pertaining thereto.

8. Ina winding device for spooling machines, the combination of: a plurality of bobbin holders arrangedin 1 pairs with the two bobbin holders of each pair mounted one above the other, each of said bobbin holders being adapted selectively to support a bobbin for winding a cop thereon or to release said bobbin to allow removal thereof from the respective bobbin holder, a plurality of driving rollers respectively associated one with each pair of bobbin holders and arranged for frictionally engaging the cops being formed on said bobbins and to rotate the latter with said cops, a plurality of slide means respectively supporting said bobbins, parallel guiding means respectively guiding said slide means for displacement thereof in horizontal direction and perpendicular to the driving axis of the respective driving rollers pertaining to each pair of said bobbin holders, pressing means operatively connected to a plurality of said slide means for simultaneously acting upon the same to uniformly press the cops respectively supported thereby against the respective driving roller pertaining thereto, latching means respectively associated with said slide means and operable in response to a movement of said slide means away from said driving rollerpertaining thereto into a certain position to lock the respective slide means in a position in which the respective completed cop supported by the slide means pertaining thereto is spaced from the respective References Cited in the file of this patent UNITED STATES PATENTS 50,392 Saunders Oct. 10, 1865 535,326 Farnsworth Mar. 5, 1895 558,314 Ryon Apr. 14, 1896 1,728,417 Lewis Sept. 17, 1929 2,582,429 Haswell Jan. 15, 1952 2,647,697 Pollock Aug. 4, 1953 FOREIGN PATENTS 311,263 Great Britain Oct. 23, 1929 780,555 France Feb. 4, 1935

Images