GB2126564A - Turret winder - Google Patents

Abstract

A continuous winder turret carries winding spindles (20, 22) rotatable between an upper core loading/web guiding location and lower winding-unloading location. Each spindle has an associated angle roll (156) and lay-on roll (158) mounted on a support (38) which is adapted to move on rails so as to remain in continuous tangential relationship with the winding roll thereon as it increases in diameter. A web cutter is provided adjacent the lay on rolls to sever the web running to a fully wound roll and initiate winding on the new core. The angle roll (156) guides the web to provide a constant contact angle between the web and the winding roll and the lay-on roll (158) engages the winding roll at the point of contact of the web excluding air from between the wound web layers. During winding, the angle roll associated with the other (e.g. upper) winding spindle acts as a guide roll for the web being wound. <IMAGE>

Description

SPECIFICATION Internal winder lay-on rolls My invention relates to the field of continuous winders and more particularly to an improved lay-on roll system for use with continuous turret type winders.

In winding a web of material at high speed it is desirable to have a lay-on roll in contact with the winding roll to exclude airfrom between the layers, thereby preventing side slipping or cinching up or both which may spoil the roll. The lay-on roll should be located as close as possible to the point at which the web is laid on the winding roll and should exert a relatively constant contact pressure on the roll. While these objectives have been attained for single station winders, a satisfactory system for use with continuous turret type winders is not available.

The main problem with continuousturrettype winders occurs during the transfer operation, when the lay-on roll must be raised out of contactwith the winding roll so thattheturret may be rotated to bring the next core into the transfer location. As soon as the lay-on roll is lifted, its function of excluding air stops.

The web may then begin to skate sidewise on a film of airtrapped between the layers. As the transfer operation may take one or two minutes,this results in hundreds of feet of poorly wound material, which very often must be removed as scrap.

Attempts to solve the problem outlined above have included the use of auxiliary lay-on or rider rolls as described in Pen rod Patent 3,478,975. The auxiliary lay-on rolls, one for each core, are mounted on the turret and used to exclude airfrom between the layers of the winding roll during the time the primary lay-on roll is retracted due to the rotation oftheturret. The auxiliary lay-on rolls, however, have not been entirely effective, as the contact pointofthe auxiliary roll with the winding roll is long afterthe point at which the web initially lays on the winding roll. This requires any trapped air to slide backaround the circumference of the winding rollagainstwebtension in orderto escape.

In addition, the auxiliary lay-on roll supportstructures add furtherweight to be supported by the turret assembly at various angular positions.

One object of my invention is to provide internal winder lay-on rolls which serve to exclude air from between the layers of material of a winding roll.

Another object of my invention is to provide internal winder lay-on rolls which remain in contactwiththe winding rolls throughout the winding process.

Still another object of my invention is to provide internal winder lay-on rolls which are always located very close to the point at which the web of material is laid onto the winding rolls.

Afurther object of my invention is to provide internal winder lay-on rolls which exert relatively constant contact pressure on the web and winding rollsthroughoutthewinding process.

A still further object of my invention is to provide internal winder lay-on rolls in which the contact angle ofthe web to the winding roll remains relatively constantthroughoutthewinding process.

Other and further objects of my invention will appearfrom the following description.

In the accompanying drawings which form part of the instantspecification and which are to be read in conjunction therewith and in which like parts are indicated by like reference characters in the various views: FIGURE lisa partially schematic front elevation of a winder incorporating my internal lay on rolls.

FIGURE 2A is a fragmentaryfront elevation of a portion oftheturretofthewindershown in FIGURE 1 and drawn on an enlarged scale.

FIGURE 2B is a fragmentary front elevation ofthe remaining portion ofthe turret ofthe winder shown in FIGURE 1 and drawn on an enlarged scale.

FIGURE 3 is a fragmentary side elevation of the turretwith parts shown in section and other parts removed, taken along the lines 3-3 of FIGURE 2A.

FIGURE 4 is a schematic view of one form of control system which can be used with my internal winder lay-on roll.

FIGURE 5 is afrontelevation of an alternate embodiment of my invention.

FIGURE 6 is an end elevation of the embodiment of my invention shown in FIGURES.

Referring nowto FIGURE la a continuous winding apparatus indicated generally by the reference character 10 includesa base 12supported on afloor 14, and a stand 16 adapted to rotatably support a turret 18.

Turret 18 carries a pair of removable roll supporting spindles 20 and 22 which are adapted to be driven in a counter clockwise direction by motors (not shown).

Spindles 20 and 22 are adapted to carry respective cores 24 and 26, around which a web 28 is wound and on which the finished roll is supported when removed from its spindle. As will be more fully described hereinbelow, spindle 22 isshown in the lowerwinding and roll unloading position or location and spindle 20 is shown in the upper transfer position or location.

A motor30 mounted on the base 12, is adapted when energized to rotate turret 18 on its center shaft 32 through a belt or a chain 34. During normal operation of the winder 10, the web 28 is wrapped around the core 26 in the winding position. As the winding core 26 nears afull condition, the web 28 is transferred to the core 24 at the transfer position and the web begins winding on core 24. The full roll is then removed and the turret 18 rotated, bringing the new winding core 24 from the transfer position to the winding position. The spindle 22 is then separated from thefull roll, fitted with a new core and reinserted into the turret 18 at the transfer position, ready to begin the process again.

I provide the spindles 20 and 22 with respective transfer and lay-on roll units, indicated generally by respective reference characters 36 and 38. As will be described more fully hereinbelow, each unit 36 and 38 performs the transfer operation and provides a continuous lay-on or rider roll for its associated spindle. The lay-on roll serves to exclude air from between the layers of the winding roll from the initial transfer until the end of the winding process, thereby preventing side slipping and cinching-up which may result in a spoiled roll.

Referring nowto FIGURES 2A, 2B and 3, since unit 36 is substantially the same as unit 38, only the former will be described in detail. Unit 36 includes a pair of parallel spaced frame members 40 and 42 secured to each other in spaced relationship by struts 44.

Supports 50 and 52 secured to the frame members 40 and 42 by screws 54 carry a stationary shaft 48 which pivotallysupports a short, low-inertia arm 46 at a location between the frame members 40 and 42. A portion of the shaft 48 extending outwardly of member 42 carries one or more bearings 58 which rotatablysupporta roll 56,which is adapted to insure that the contact angle formed between the web 28 and the core 24 remains within an acceptable range during the rotation of the turret 18 and throughout the winding process.

Arm 46 carries a shaft 60 which extends through a slot62 inframemember42. Bearings66On shaft60 rotatably support a lay-on or rider roll 64which excludes airfrom between the layers ofthe winding roll by applying a constant pressure to the roll along the line of contact ofthe web 28. This constant pressure is supplied by a piston and cylinder assembly 68 including a piston rod 70 which is connected to arm 46 bymeans of a pin 72. The assembly68 carries rollers 74 which are received by frame members 40 and 42 to support the assembly 68 between the members.

It will be readily appreciated that opening 62 permits limited rotary movement of the short arm 46 onthe shaft 48 corresponding to movement of the lay-on roll 64 between a fully retracted position and a fully extended position. A valve 76 is adapted to be operated to supply fluid under pressure to the interior of the assembly 68 to move the lay-on roll 64 from its retracted position to its extended position, in contact with the winding roll, and to maintain the pressure against the roll as it increases in diameter, in a manner to be described more fully hereinbelow.

I mount a counterweight78 atthe end ofthe arm 46 remote from the lay-on roll 64to insure that the contact pressure remains constant throughout the rotation ofthe turret 18.1 form rolls 56 and 64 with respective pulley grooves 80 and 82 which receives an endless belt 84, which ensures the synchronized rotation of both lay-on 64 and roll 56 despite the pressure exerted on the lay-on roll. This expedient prevents bunching ofthe web between the two rolls 56 and 64.

Unit 36 also carries a cut-off knife assembly indicated generally by the reference character 86 which is used during the transfer operation to sever the web 28. The assembly 86 includes a stationary main support shaft 88 carried by frame members 40 and 42, which rotatably supports a sleeve 90 provided with spaced arms 92. Arms 92 receive a knife support 94,which holds a suitable knife blade 96. A bar 102 secured to both ofthe arms 92 extends through a slot 104 in the edge of member 42 to a location at which it is connected to a rod 98 of a piston and cylinder assembly 100. Trunnions 106 and 108 pivotally support cylinder assembly 100 on members 40 and 42.

Avalve 110 is adapted to be operated to supply fluid under pressureto the interior of the assembly 100, to fire the knife 96 in a mannerto be described.

I mount each ofthe units 36 and 38 on the turret 18 for rectilinear movement toward and away from its associated winding roll. A first pair of spaced ball bushings indicated generally by the reference characters 114 and 116 supportthe unit 36 forsliding movement toward and away from winding roll 24.

Each bushing 114 and 116 includes an elongated rail 120 of cylindrical cross section secured to the turret 18 by any suitable means such as screws 122. Each rail 120 receives a slider 124 having a cylindrical recess for receiving the rail. Screws orthe like 126 secure the sliders to frame member 40.

I connect the rod 128 of a piston and cylinder assembly, indicated generally by the reference char acter 130, to a pin 118 on frame member 40. Avalve, indicated generally by the reference character 132 is adaptedto beoperated in a mannerto bedescribed hereinbelow alternativelyto connectthe cylinder of assembly 130 to a source of hydraulic fluid under pressure orto an exhaust portto bleed fluid from the cylinder.

Referring nowto Figure4valve 132 includes a spool 133 normally centered by springs 134 and 135 in a position at which it blocks both an inlet port P connected to a source of hydraulicfluid under pressure and an exhaust port E connectedto a sump orthe like so that no connection is provided to the valve outlet port 0.

A pushbutton switch PB is adapted to be actuated to connect a relay winding 1 R to a source 136 of electrical potential to energize the winding to close switches 1 R1 and 1 R2. Switch 1 R1 completes a holding circuit for winding 1 R through a normally closed limit switch LS. Switch 1 R2 completes the circuitto a solenoid S coupled to spool 133 to move the spool to the right, as viewed in Figure 4, to connect port P to port 0 to supply hydraulic fluid to the cylinder of assembly 130 to cause the associated unit 36 to move to the right, as viewed in Figure 2A. Ultimately the unit reaches its position closest to the core 24 atwhich position it opens LS to deenergize 1 Rand S to permit spool 133 to be returned to its neutral position.It will readily be appreciated that the circuit set in operation by switch PB could be used to control a pump directly rather than the solenoid S.

I provide a pneumatic piston and cylinder assembly indicated generallybythe reference character 138 for controlling valve 132 to bleed fluid from the cylinder of assembly 130 as the roll 24 builds up. The assembly 138 includes a piston 140 normally urged to the left as viewed in Figure 4 by a spring 142. An actuating element 144 normally supplies sufficient air under pressure from a line 146 to move piston 140 to the right against the action ofspring 142. As the roll on core 24 builds up arm 46 pivots in a clockwise direction around shaft 48 against the action offluid under pressure in cylinder68. Ultimatelyaflag 150 on arm 46 interrupts the stream of airflowing through the gap of element 144. When this occurs spring 142 moves piston 140 to the left. The piston is coupled to the spool 133 of valve 132 so thatthevalve moves to the leftto establish a connection between the outlet port O and the exhaust port E of valve 132. In this condition the pressure in cylinder 68 causes the unit 36 to back off to the left as viewed in Figure 2Ato bleed fluid from the cylinder of assembly 130. Finallytheflag 150 moves out of the gap in element 144 and spool 133 is restored to its neutral position. It will be readily appreciated thatthis action continues throughoutthe buildup of the winding roll, moving unit 36 from its fully extended position as shown in FIGURE 2Ato its fully retracted position as shown in FIGURE 1.

Toeliminatefrequentsmall movements of unit 36, it is contemplated that valve 132, once having received thesignalto bleed assembly 130,would continue to do so even afterthe signal stopped, until the unit had moved a fixed increment. It is also contemplated that a proportional controller could be used to sense the position ofthe lay-on roll 64 and initiate a continuous relatively constant speed movement of the unit to match the rate of increase of the diameter of the winding roll. In addition, in applications where it is desired to position the lay-on roll 64 in close proximity to the winding roll at the entry point ofthe web 28, but without contact pressure, a proximity sensor may be used to control the movement of the unit 36 in either incremental steps or in a constant proportioning manner.

Referring nowagainto FIGURE 1,during normal operation ofthe winder 10, web 28 is wound around the core 26 mounted on the spindle 22 in the lower winding position. Unit 36 and its associated lay-on roll 64 are both in theirfully retracted positions and roll 56 serves as a guide 152 and a turret mounted internal guide roll 154. The web continues around a roll 156 and a lay-on roll 158, both associated with unit 38, and is wound around core 26. As the roll on core 26 increases in diameter, unit 38 remains in tangential relationship in the same manner as described for unit 36, moving towards its fully retracted position as shown in FIGURES 2A and 2B.Atthis point valve 132 is operated to supplyfluid under pressure to assembly 130,thereby moving unit36to itsfullyextended position in preparation fortransfer (FIGURES 2A and 2B). As the roll on core 26 reaches its maximum diameter, the spindle drive motorforthe spindle 20 in the transfer position is energized to accelerate the spindle to match the speed of the web 28. Spindle 20 carries a core 24 which is prepared for transfer in a manner known to the art.

Valve 76 isthen operated to supplyfluid under pressure to assembly 68, thereby "firing" the short arm 46 to its fully extended position, moving lay-on roll 64 into engagementwith the web 28, and the web into engagementwith the prepared core 24. Valve 110 is then operated to supply fluid under pressure to assembly 100, "firing" the cut-off knife 96 to sever the web 28 as shown in FIGURE 2B. The trailing end ortail of the web continues to thefull winding roll, which is decelerated upon the firing ofthe knife. The leading edge adheres to the new core 24, which is driven at a velocity equal to that of the web 28, beginning a new winding roll.

When thefull roll stops, lay-on roll 158 and unit 38 are moved to theirfully retracted positions and the roll,togetherwith its associated spindle 22 and core 26 is removed from the turret 18. The spindle 22 is separated from the core 26 which remains to support the full roll. Motor 30 is then energized, rotating the turret 18 in a clockwise direction to bring the new winding roll (supported on core 24) and unit 36 to the lowerwinding position, and unit 38 to the upper transfer position. Roll 156 associated with unit 38, and a turret mounted roll 160, serve astheguide rolls for the web 28 as it is wound around spindle 20 in the lowerwinding position.Spindle 22. fitted with a new core prepared for transfer, is re-inserted in the turret 18 at the upper transfer position, ready to begin the sequence again.

Itwill readily beappreciatedthatthe lay-on rolls initially act as bumper rolls to effectuate transfer and then serve to exclude air from between the layers of the winding rolls at all positions oftheturret. The lay-on rolls are located relative to the winding roll such thattheir point of contact is always at the point where the web initially lays on the winding roll. The angle rolls keep the contact angle ofthe web to the winding roll within a predetermined range at all positions of the turret so that the pressure exerted by the lay-on roll may be relatively constant, which is desirable to avoid damage to the web.

Referring nowto FIGURES 5 and 6, an alternate embodiment of my invention is a transfer carriage assembly indicated generally by the reference character 200for use in a winder of the type described in KrimskyetalU. S. Patent 4,102,511 issued July27, 1978. Awinder of the type shown in the Krimsky eft at patent includes a cross shaft 202, driven by means of a motor (not shown). Shaft 202 carries two pairs of roll supporting arms, adapted to support a pair of spindles 204 and 206 which extend parallel to shaft 202 at generally diametrically opposite locations around the shaft. In normal operation ofthe winder, spindle 206 will support an active roll which is being wound and spindle 204will support a fresh core 208 on which a roll isto be wound.

Crossshaft202carriesa numberof collars 210 which are secured along the length ofthe shaft by any suitable means, such for example bywelding orthe like. Bolts 212 secure four elongated rods 214,216,218 and 220 in seats 222 of the collars 210. Rods 214,216, 218 and 220 extend from a location adjacent one end ofthe cross shaft to a location adjacent the other end thereof.

Transfer carriage assembly 200 includes respective side frames 224 and 225 each having a generally rectangular opening 226 at the centerthereof. Since the supporting structure for both side frames is identical, only that associated with frame 224 will be described in detail. Any suitable means, such for example as bolts 228 orthe like secure a pair of bearing supporting brackets 230 and 232 to the frame 224 at the top and bottom of opening 226. Bracket 230 is provided with recesses 234 to receive rolling bearings 236 and 238; and bracket 232 is provided with recesses 240 to receive rolling bearings 242 and 244. Each of the bearings 236,238,242, and 244 includes a member 246 having a cylindrical central portion and hemispherical end portions, the central portion having the same radius as the rods. Each of the members 246 receives an endless chain including a plurality of rollers 248 which are contoured to conform to the cylindrical surface ofthe central portion. We provide bolts250forsecuringthe members 246 in recesses 234 and 240, thus to position the bearings 236,238,242 and 244. Owing to this arrangement, the frames 224 and 225 can be moved axially along the shaft 202. This arrangement permits the frames to be moved toward and away from each other to accommodate cores of different lengths orto be moved as a unitfrom left two right as desired. Atthe sametime, owing to the arrangement of the bearings, carriage 200 will rotate with the shaft 202 when the shaft 202 is driven around its axis.

Frames 224 and 225 support a pair oftransfer lay-on roll units, indicated by respective reference characters 252 and 254, associated with the respective spindle.

Aswill be morefully described hereinbelow, units 252 and 254 are adapted to perform the transfer operation and to provide a continuous lay-on or rider roll for its associated core throughoutthe winding process. I have shown the units at their positions at the moment oftransfer,with unit254providing a lay-on rollforthe full roll winding on spindle 206 and unit 252 performing the transfer operation on core 208.

Since the units 252 and 254 are substantiallythe same, I will describe only unit 252 in detail. Unit 252 includes a pair of side supports 256 and 258 connected by a cross piece 260.1 mount respective vertically spaced sliders 262 and 264 on each ofthe side supports. The pairs of sliders 262 and 264 carried by the side supports 256 and 258 receive respective rails 270 and 272 secured to frames 224 and 225. The unit 252 is thus mounted for sliding movement on the frames. A motor 274 is adapted to be energized in a mannerto be described to drive a worm 276 which drives a gear 278 to provide an inputto a gear box 280 having a first output coaxial with its inputto drive a lead screw 282.Gear box 280 has a second output at right angles to the first output to drive a shaft284to provide an inputto a gear box 286 having an output at rightanglesto its inputto drive a lead screw 288. Lead screws 282 and 288 receive nuts 290 and 291 secured to the respective side supports 256 and 258 to provide the drive for unit 252.

Side supports 256 and 258 support respective pivot shafts 292 carrying arms 296 which rotatably receive the shaft of a roll 300. Pivot shafts 294 on the respective side supports carry levers 298, one end of each ofwhich rotatably receives an end ofthe lay-on roll 302. Respective adjustable links 304 connect pins 308 on the other ends of the levers 298to pins 306 on the end of arms 296. A piston and cylinder assembly 310 carried bytrunnions 316 includes a rod 312 connected to lever 298 by a pin 314. Avalve318 is adapted to be actuated to supply fluid under pressure to piston and cylinder assembly 310to urge roll 302 against its associated winding roll with a predetermined pressure.Itwili readily be appreciated that the arrangement of arms 296, levers 298 and links 304 permits the roll 300, which is substantially identical to roll 302, to act as a counterweight in all positions ofthe unit.

Itwill be seen that roll 300 serves as a guide roll, angle roll and a counterweight, and roll 302 serves as a guide roll, bumper roll, and a lay-on roll. For example, during normal winding when unit 252 and rolls 300 and 302 are in their retracted positions (as indicated by the dot-dash lines) rolls 300 and 302 act as guide rolls forthe web 320 (dot-dash line). During the transfer operation, when motor 274 is energized to move unit 252 to its extended position and assembly 310 is operated to move rolls 300 and 302 to theirextended positions, roll 302 acts as a bumper roll moving web 320 into contact with the prepared core 208, and roll 300 acts as an angle roll providing a relatively constant contact angle between the web 320 and the winding roll throughoutthe rotation of the transfer carriage assembly 200.After the transfer operation is completed, roll 302 serves as a lay-on roll to exclude air from between the layers ofthe winding roll, and roll 300 continues as an angle roll and as a counterweight to insure that the contact pressure exerted by the lay-on roll 302 on the winding roll remains constant throughoutthe rotation ofthe assembly 200.

As the winding process continues, the diameter of the winding roll increases moving roll 302 from its extended position towards its retracted position, against the action of piston and cylinder assembly 310.To prevent excess pressure and damageto the roll, it becomes necessary to move unit 252 away from the winding roll after a certain amount ofbuildup. To this end, I mount a conventional limit switch or position sensor LSI on support 256, for example, to detect movement of arm 298.In a manner known in the art, the switch or sensor, in responseto a predetermined increase in winding roll diameter, provides a signal which is used to energize motor 274 to move unit 252 awayfrom the winding roll.Asthis happens, roll 302 extends underthe action of assem buy310 and the sensor terminates the signal to stop movement of unit 252, as morefully described hereinabove.

Unit 252 is also provided with a conventional cut-off knife assembly and, in a manner known to the art, is adapted when operated to severthe web 320.

In normal operation ofthewinder, a web 320 is wound around the core mounted on the spindle 206 in the upperwinding and roll unloading position. Unit 252 and its associated rolls 300 and 302 are in their fully retracted positions (as indicated by the dot-dash line) and the rolls serve as guide rolls forthe web 320 between a pair of internal guide rolls 324 and 326 mounted on frame 224. The web continues around an angle roll 328 and a lay-on roll 330 associated with unit 254, and is wound around the core on spindle 206. As the winding roll on spindle 206 increases in diameter, unit 254 moves steadilytowards its retracted position in the same manner as described for unit 252.As the roll on spindle 206 reaches its maximum diameter, motor 274 is energized to move unit 252 to itsfully extended or transfer position, and spindle 204 is accelerated to the speed ofthe web 320 by a motor, not shown.

Valve 318 is then operated to supply fluid under pressure to assembly 31 0, thereby moving roll 302 into engagementwith the web 320, and the web into engagement with the prepared core 208 on spindle 204. Knife assembly 322 is then operated, in a manner known to the art, to severtheweb 320 against core 208, upon which the new roll beginswinding.The completed rolltogetherwith its spindle 206 is removed from the winder and cross shaft 202 rotated in a clockwise direction to bring the new winding roll (on spindle 204) to the upperwinding position where it continues until it reaches its maximum diameter.

Spindle 206 is separated from the completed roll, fitted with a new core prepared fortransfer and reinstalled in the winder at the lowertransfer position, readyto begin the sequence again.

Itwill readily be appreciated that lay-on roll 302,330 serves as a bumper roll to effectuate transfer and then remains as a lay-on roll to exclude airfrom between layers ofthe winding roll until the roll is completed.

The angle roll 300,328 provides a relatively constant contact angle between the web 320 and the winding roll throughoutthe rotation of the transfer carriage assembly 200. This, together with the use ofthe angle roll 300,328, as a counterweight, allows the pressure exerted by the lay-on roll 302,330 to be relatively constant.

It will be seen that I have accomplished the objects of my invention. I have provided internal winder lay-on rolls which serve to exclude airfrom between the layers of material of a winding roll. My internal winder lay on rolls remain in contact with the winding rollsthroughoutthewinding process and are always located at the point where the web of material is laid ontothewinding rolls. In addition, myinternal winder lay-on rolls exert a relatively constant contact pressure on the web and provide a relatively constant contact angle of the web to the winding rolls throughoutthe winding process.

It will be understood that certain features and subcombinations are of utility and may be employed without reference to otherfeatures and subcombinations. This is contemplated by and is within the scope of my claims. It is further obvious that various changes may be made in details within the scope of my claims without departing from the spirit of my invention. It is, therefore, to be understood that my invention is not to be limited to the specific details shown and described.

Claims (12)

1. Apparatusforwinding a length of material on a core including in combination a turret, means mounting a core for rotary movement on the turret, means mounting said turret for movement of said core betweenatransferposition atwhich winding of a length on said core is initiated and an unloading position at which a fully wound core is removed from said turret, a lay-on roll, means mounting said lay-on roll on said turret for movement between a lay-on position in engagementwith material on said core and a position out of engagement with material on said core, and means including said lay-on roll for initiating winding of said length on said core at said transfer station.

2. Apparatusforwinding a length of material on a core including in combination a turret, means mounting a corefor rotary movement on the turret, a carriage, means mounting said carriage for rectilinear movement on said turret between a position adjacent to said core and a position relatively remote from said core, a lay-on roll, means mounting said lay-on on said carriage for movement toward and away from said core, resilient means urging said lay-on roll into engagement with material on said core, and means responsive to movement of said lay-on roll away from said core as material builds up on said roll for moving said carriage away from the core.

3. Apparatusforwinding a length of material on a core including in combination a turret, means mounting a core for rotary movement on the turret, means mounting said turret for movement of said core between a transfer position at which winding of a length on said core is initiated and an unloading position at which a fully wound core is removed from said turret, a lay-on roll, means mounting said lay-on roll on said turret for movement between a lay-on position in engagement with material on said core and a position out of engagement with material on said core, means including said lay-on roll for initiating winding of said length on said core at said transfer station and means mounting said lay-on roll for movement in the direction of its axis of rotation.

4. Apparatusforwinding a length of material on a core including in combination a turret, means mounting a core for rotary movement on the turret, a carriage, means mounting said carriage for rectilinear movement on said turret between a position adjacent to said core and a position relatively remote from said core, a lay-on roll, means mounting said lay-on roll on said carriage for movement toward and away from said core, resilient means urging said lay-on roll into engagement with material on said core, means responsive to movementofsaid lay-on roll away from said core as material builds up on said roll for moving said carriage away from the core and said carriage mounting means mounting said carriage for movement in the direction ofthe axis of rotation of said lay-on roll.

5. Apparatusforwinding a length of material on a core including in combination a turret, means mounting a core for rotary movement on the turret, a carriage means mounting said carriage for rectilinear movement on said turret between a position adjacent to said core and a position relatively remote from said core, a lay-on roll, means mounting said lay-on on said carriage for swinging movement toward and away from said core, resilient means urging said lay-on roll into engagement with material on said core, and means responsive to movement of said lay-on roll awayfrom said core as material builds up on said roll for moving said carriage away from the core.

6. Apparatus for winding a length of material on a core including in combination, aturret, means mounting a core for rotary movement on theturret, a carriage, means mounting said carriagefor rectilinear movement on said turret between a position adjacent to said core and a position relatively remote from said core, a shaft on said carriage, a lay-on roll, means including an arm on said shaftfor mounting said lay-on roll for swinging movementtoward and away from said core, first means acting between said turret and said carriage for urging said carriage to said position adjacent to said core, second means acting between said carriage and said arm for urging said lay-on roll into engagement with material on said core, and means responsive to movement of said lay-on roll away from said core as said material builds up on the core for controlling said carriage urging means to permit movement of said carriage away from said core while maintaining substantially constant pressure of said lay-on roll on the material on said core.

7. Apparatus as in Claim 6 including a guide roll on said shaftfor guiding material to said lay-on roll to maintain substantially the same angle between material coming to said core and the material on said core in all positions ofsaidturret.

8. Apparatus as in Claim 7 including means for synchronously driving said guide and lay-on rolls.

9. Apparatusforwinding a length of material on a core including in combination, aturret, means mounting a corefor rotary movementontheturret, a carriage, means mounting said carriage for rectilinear movement on said turret between a position adjacent to said core and a position relatively remote from said core, a first lever, means mounting said first lever on said carriage for pivotal movement ofthe lever about a point intermediate its ends, a lay-on roll carried by one end of said first leverfor movementtoward and away from said core, a second lever, means mounting said second lever on said carriage for pivotal movement around a point adjacent to one end of said second lever, a guide roll supported on said second lever at a point intermediate the ends thereof, and a link connecting the other ends of said levers whereby said guide roll functions as a counterweightforsaid lay-on roll in all positions of said turret.

10. Apparatusforwinding a length of material on a core including in combination aturret, means mounting a core for rotary movement on theturret, means mounting said turret for movement of said core between a transfer position atwhich winding of a length on said core is initiated and an unloading position at which a fully wound core is removed from said turret, a lay-on roll, means mounting said lay-on roll on said turret for movement between a lay-on position in engagementwith material on said core and a position out of engagement with material on said core, means including said lay-on roll for initiating winding of said length on said core atsaid transfer station, and a guide roll on said turret for guiding a lengthofmaterialtosaidlay-on roll whereby said length makesthesameanglewith the material on said core in all positions oftheturret

11. Apparatusforwinding a length of material on a core including in combination, a turret, means mount ing a coreforrotary movementontheturret, means mounting saidturretfor movement of said core between a transfer position atwhich winding of a length on said core is initiated and an unloading position atwhich a fully-wound core is removed from said turret, a shaft carried by said turret, a lay-on roll, means including an arm an said shaft mounting said lay-on roll on said turretfor movement between a lay-on position in engagement with material on said core and a position out of engagement with material on said core, means including said lay-on roll for initiating winding of said length on said core at said winding station,and a guide roll carried by said shaft for guiding a length of material to said lay-on roll whereby said length makes the same anglewith the material on said core in all positions oftheturret.

12. Apparatusforwinding a length of material on a core including in combination, turret, means mounting a core for rotary movement on said turret, means mounting saidturretfor movement of said core between a transfer position at which winding of a length on said core is initiated and an unloading position atwhich a fully wound core is removed from said turret, a first lever, means mounting said first leveron said turretfor pivotal movement of the lever about a point intermediate its ends, a lay-on roll carried by one end of said first leverfor movement toward and away from said core, a second lever, means mounting said second lever on said turret for pivotal movement around a pointadjacentto one end ofsaid second lever, a guide roll supported on said second lever at a point intermediate the ends thereof, and a link connecting the other ends of said levers whereby said guide roll functions as a counterweight for said lay-on roll in all positions of said turret.