US2978200A - Apparatus for winding material with programmed tension - Google Patents

Description

April 4, 1 6 s. c. LARSON ETAL 2,978,200

APPARATUS FOR WINDINGMATERIAL WITH PROGRAMMED TENSION Original Filed Dec. 5, 1954 4 Sheets-Sheet 1 ATTORNE April 4, 1961 s. c. LARSON El'AL 2,978,200

APPARATUS FOR WINDING MATERIAL WITH PROGRAMMED TENSION Original Filed Dec. 3, 1954 4 Sheets-Sheet 2 April 9 s. c. LARSON ETAL 2,978,200

APPARATUS FOR WINDING MATERIAL WITH PROGRAMMED TENSION 4 Sheets-Sheet 3 Original Filed Dec. 3, 1954 IQIOIIIII.

N w E. 2 ma Y N -E m m -7 J Aaznoav ATTOR Y:

April 1961 s. c. LARS-ON ETAL 2,978,200

APPARATUS FOR WINDING MATERIAL WITH PROGRAMMED TENSION Original Filed Dec. 3, 1954 4 Sheets-Sheet 4 i mh m APPARATUS FOR WINDING MATERIAL WITH PROGRAMME!) TENSION Stanley C. Larson, Chicago, and John J. Halliday,-' River Forest, 11]., assignors toJolmson & Johnson, a corporation of New Jersey l Continuation 'of application Ser. No. 472,938, Dec 3, 1954. This application Apr. 26, 1960, Ser. No. 24,808

Claims. (Cl. 242-7551) in the finished roll tension in its outer convolutions is.

less than in its inner convolutions. Assuming wind-up tension so regulated in the outer convolutions to provide tightness sufiicient to give a roll a neatappearance, it happens often that the inner convolutions havegreater tightness than desired with the result that. it is diflicult to unwind the tape as it nears thecore. In some instances there is a transfer of the adhesive to the back side of the tape to the extent that a portion of the tape near the core must be discarded. V 1 r In Us. Patent 2,876,893 to B. B. Blackford et al. whose application Ser. No. 452,996 filed August 30,1954 was co-pending with application Serial Number 472,938, filed December 3, 1954, now forfeited, of which this application is a continuation, there is described a roll of normally tacky pressure-sensitive adhesive tape wound under a tension regulated in accordance with a prede termined program. In a roll of tape so wound, any condition of tension throughout the many convolutions of the roll can be obtained. Thus, convolutions near the core can be wound withtension less than that in the outer convolutions, so that. it is just as easy to unwind.

the tape as it approaches the core as it is at the start of the roll. Indeed, by selectingthe appropriate wind-- ing program, tension in the extreme outermost convolutions of theroll can be made greater than in the convolutions near the core, so that a roll of tape will result having a neat appearance, little likelihood of becoming deformed during shipmentof the tape and before its use,

and which, nevertheless, will have tension in the inner.

convolutions sufiiciently low to permit easy unwinding.

The invention has been illustrated as applied .to a webslitting machine of the score-cutting type. In such a machine a traveling .web, which :may be coated on one side with a normally tacky pressure-sensitive adhesive,. is drawn from a bundle roll and guided by means of suitable rolls through the machine to a slitting station where the web is cut longitudinally into narrow strips or tapes. Alternate strips pass to'one mandrel supporting a plurality of cores on which the strips are wound, whereas the remaining strips pass to a second mandrel similarly that employs fine, stainless steel particles mixed with a dry lubricant and which when magnetized create a low transmitting bond between the driving and driven parts equipped with cores for the same purpose. Such machines are provided usually with stopping and starting devices whereby, after the leading ends of the strips of tape are started on their respective cores, operation of the machine may be inaugurated and continued until predetermined lengths of tape have been wound up, whereuponthe machine may bebrought to rest and a new set of;cores brought into 'positionready for the'next' windup operation.

Patented Apr. 4, 1961' In accordance with the present invention the wind-up mandrels are driven through clutches so designed that the torque transmitted by them can be continuously varied. The variation in torque is so planned as to provide a predetermined tension in the tape throughout its wind-up operation. a

In the embodiment of the invention selected for illustration, the mandrels are driven each through a clutch of the clutch. The amount of tractive force exerted by te particles between the rotative parts can be varied infinitely from zero .to complete engagement, the tractive force being in direct ratio .to the amount of electrical energy applied to effect magnetization. The electrical energy is regulated by means of a rheostat, which is settable to vary the electrical energy supplied throughout the period the rolls of tape are being wound up. Specifically, this variation in the setting of the rheostat is controlled by an edge cam which may be set to make one revolution throughout the wind-up operation and whose edge contour. determines the setting. of the rheostat. A reduction gear driven from the drive shaft through which rotation is imparted to the mandrels rotates the edge cam onceforeach series of revolutions required to wind up a complete roll 'of tape. With such a construction, it is apparent that by varying the contour of the edge cam according to a predetermined pattern, any given tension can be 'wound into the rolls of tape.

Also in accordance with the invention, the mechanism includes a clutch device operable automatically as the wind-up operation is commenced simultaneously to initiate rotation of the edge cam to control the wind-up tension and automatically, as the wind-up operation is completed, to terminate rotation of the edge cam and facilitate its restoration to initial position.

A better understanding of the invention may be had from the following description read in conjunction with the accompanying drawings wherein:

Fig. 1 is a side elevation, looking from the right, of a machine equipped with the present improvements;

Fig.2 is a front elevation of the machine shown in Fig. '1;

Fig. 3 is a diagrammatieillustration of a portion of the gear train through which various parts of the machine are driven from the main drive shaft;

Fig. 4 is a partial side elevation of a portion of the cam-control device illustrated in Fig. l but on somewhat larger scale;

Fig. 5 is a rear-endelevation, partly in section, of the cam-control device illustrated in Fig. 4;

Fig. 6 is a front elevation partly in section and on a somewhat larger scale of, the clutch devices illustrated in Fig. 2; and

Fig. 7 'is a circuit diagram of the electrical equipment on the improved machine.

As illustrated, a bundle roll of adhesive, sheet or web material, 10 is supported on a mandrel 11 at the rear of the machine (Fig. 1). The web material is pulled upwardly 01f the bundle roll, past guide rollers 12 and 13 and then over and around the upper of a pair of vertically-spaced, horizontally-disposed S-rolls 14 and 15. Both the rolls 14 and .15 which are arranged directly one above the other are positively driven (means not shown) and, since the adhesive side of the web 10 is in contact with the upper roll 14 for about three quarters of its periphery, the tension exerted on the adhesive web is sufficient to' pull it with facility off the bundle roll. After leaving the surface of upper roll 14, web 10 passes through the space between it and lower roll 15, toward the rear of the latter, and then around lower roll 15 3 from whence ittravels in a forward direction toward the front of the machine.

From roll 15 the web passes over a guide roll 16 (positively driven) and then under a platen roll 17 where the sheet is slit longitudinally into a plurality of=tapes of narrow-width a and 10b by a gang of circular knives 18 spaced along and located beneath the platen roll and in edgewise engagement therewith (Figs. 1- and 2). After the, slitting operation, every other strip oftape 10a passes over a pull or guide roll 19 supportedat its opposite ends for rotation in bearings presented in the side frames of the machine near the front. From the guide roll 19 the tapes 10a travel to a series of wind-up cores 20 spaced along a mandrel 21' which is detachably mounted at-its opposite ends on devices journaled for rotation in the machine. A pull or guide roll 22, cores 23, andcore-supporting mandrel 24 provide similar disposition for the intermediate strips of tape 10b. The guide roll 22 and-mandrel24are mounted in the same fashion as guide roll 19 and mandrel 21 in the-machine side frames.

The S-rolls-14 and adjacent the rear of the machine, platen roll.17, the two guide rolls 19 and 22, and the two mandrels 21 and 24 for supportof the tape cores, areall driven by a mechanism which may be standard for the particular type of machine illustrated except that,

contrary to usual, the mandrels 21, 24 are rotated under torque that is predetermined in manner subsequently described.

The platen roll 17, whichin effect is the main shaft of themachine, is journaled'at its opposite ends in the machine side frames.

26 which, together-with a beltpulley 27 afi'ixed -to it,- is

rotatively mounted on astud 28'projecting'laterally from, The--pulley 27 is: belt-driven-froma motor 29 suitably fixed-on the floor;

The two pullthe machine-frame (Figs. 2 and 3).

or on a stationary'partof the machine. or guide=rolls 19 and 22 overwhich thestrips of tape 10a and 10b pass after leaving platen 17 are mounted on shafts 30, 31 journaled attheir-opposite ends in the machine side frame. On theleft end of each shaft 30, 31, just inside theside frame, there isfixedrespectively a gear 32, 33. An intermediate pinion 34,- rotatably arranged'on a stud 35 projecting-inwardly from the 'machine left side frame,- mesheswith both said gears to insurerotation of.both\pull rolls in the same direction,- A

sides in contact with the rolls which, to promote-thetravel ofzthe tapes through the machine, rotate in a direction opposite to the direction of rotation of-the'platen roll. Since. thepull rolls 19 and--22-are positively driven and since the tapes have their adhesive-surfaces in contact with the. rolls as-they pass'around them, any degree of tension can bewound'into therindividual rolls of tapedepending'upon the-torque exerted on the wind up inan drels 21 and 24--from' a minimum determined by-the amount of pull requiredto breakthe adhesion between the tapes and the pull-roll over which it travels to a maximum as determined by the tensile strength of the tape itself.

Variable torque to control tension in the tapes b eingwound up on mandrels 21 and 24 is derived from amain, shaft 39 on which theplaten 17 is mounted thrpugh mechanism which includes. a. of variable torque It is equipped at itsleft end'outside the machine frame-with a-gear -25-driven through a pinion clutch units 40 and 41, provided one unit for each mandrel and mounted both on a bracket 42 secured to the main frame of the machine at the right (Figs. 1, 2, and 6). The clutch 40 includes a pair of relatively moveable parts between which variable torque is transmitted. One part is equipped with a shaft-43 extending to the right and which at its end is equipped with a gear 44 meshingwith a large gear 45 fixed at the right end'ofthe platen roll. The other part ofthe clutch is providedwith a similar shaft 46 coaxial with the firstandwhich likewise isprovided with a gear 47 fixed thereon and whichmesheswith a pinion 48 fixed on a small counter shaft 49 journaled in the adjacent machineframe. fixed at the oppositeend of the counter shaft inside the machine frame meshes with a pinion 51 fixed at the adjacent end of the mandrel 21, With this arrangement, rotation of the platen shaft 39, in a clockwise direction looking at the machine from the right, rotates the mandrel21 in a counter-clockwise direction imparting to the mandrel, as it rotates, a torque which isdirectly dependent upon the amount of energy transmitted by the relatively moveable partsof the clutch 40.

The other mandrel 24 is driven in the identical manner from the gear 45 fixed on the platen shaft, i.e., between the gear 45 and the mandrel 24 there is the clutch unit 41, a pinion 52 meshing with the gear 45' and fixed on a shaft 53 associated with the driving side of the clutch,

and a train of gears leading to the mandrel which includes agear 54 on a shaft 55 associated'with the driven side of-the clutchand pinion connections 56, 57, 58, and 59 which per se and with respect to their mountings are in all respects similar to corresponding elements 48, 49, 50, and 51 previously described.

The clutch illustrated by way of example is a magnetic clutch of the type sold by The Clark Manufacturing Co. of 'Cleveland, Ohio under'the name Dynamatic Drive and described in US. Patents 2,519,449; 2,525,571; 2,543,394 and 2,580,869. In such a mechanism the, amount-of'torque transmitteddepends upon the extent'to which the clutch is energizedand this in turn on the amount of electrical energy supplied to it. In accordance-with the present invention, the electrical energy supplied-to the clutches is controlled at all times to regulate the amount-oftorque-transmitted to; the mandrels. The driving; torque, of 1 course, is counter-balanced by the resistance offered to the mandrels rotation andthisin turn is'equal for practical purposesto the summation atany-instant of the products of the radius:of the individual rolls of'tape -by: thetension in that stretch of the tape betweenthe' mandrels and the pull rolls- 19 and 22 asthe-case= may be. Since thethickness of tape in each roll istapproximately the same, all rolls being wound will have substantially the same radius at any given instant and the same wind-up tension. This tension, accordingly, can be determined by regulating the torque transmitted to the mandrels.

The amount of electrical energy transmitted to the clutches at any time is determined by a unit 60 mounted on a bracket 61 secured to the'base-frame of the machineat-the'right (Figs. 1, 2, 4, and 5). This unit consists. of*a reduction-gear unit 62 of suitable type fixed on the bracket 61 and which is driven by chain 63 from main drive shaft39 of the machine, i.e., the shaft on which the platen 17 is mounted. The reduction gear hasa,fore and aftdriven shaft 64 arranged in coaxial gether so that the rear section isdrivenby the reductiongear and, wh en de-energized, disconnect-the sections so that the rear section is, free forindependent rotation.

At the rear end of the rear-mostshaft section 65 there is fixed an edge cam 69 whose edge, as it rotates eu- A similar pinion 50.

upper end of a bar member 70 constrained for sliding movement in a vertical direction. For efiiciency in operation, the vertically-movable member 70 isarranged directly beneath the axis of shaft 65 on which cam 69 is mounted, so that as the cam is rotated, movement of the vertical member is effected radially with respect to the cam and in amount :as determined by the configuration of the cams edge.

, Vertically-movable bar member 70, generally square in configuration, is constrained for/sliding movement in a vertical guideway- 72 presented in the front face of a vertically-disposed bar 73 secured to a rearwardly-extending leg of a correspondingly disposed,angle iron -74 whose other leg extends-laterally toward the machine frame and; isv secured at the top'to ablock 75, which supports the rear bearing member 67. The guideway 72 isclosedby, a faceplate 76 suitably secured in place on thebar 73 to retain the vertically-movable member 70 in, the guideway throughout its sliding movement. A

narrow horizontal plate 77 as long as the plate 76 wide" spans the guideway 72 near the top of the bar 73 likewise to retain the vertically-movable member 70 in the guide- -When the vertically-moving member 70 is in its topmost position, the bar 73 in which it slides vextends down beyond its lower end a distance sufficient to accommodate at'least the full stroke of the moveable member, as determined by the contour of the overlying cam 69. The guideway 72 is closed at the bottom by a plate 78 sedared to the bar 73 at its lower end and it is formed in .its top surface with a recess 79 to accommodate the lower end of acompression spring 80 which reacts be tween said plate and the upper end of a pocket 81 drilled vertically into the lower end of the vertically-movable member 70. The arrangement is such that the verticallymoveable member 70 is constrained always to follow in its vertical. movement the contour of the edge cam 69 as the latterrotates. I

The, vertically-movable member 70 presents a toothed rack section 82 in that one of its faces which rides adjacent the inner surface of the closing plates 76 and 77 and in the opening defined by the inner opposed edges of these plates, the rack teeth mesh with a pinion gear 83 "fixed on the end portion of a shaft 84 which is the extension of the rotor shaft of a rheostat 85 fixed on a plate 86 depending from the journal-supporting post 75. The rheostat is mounted on the front face of the plate 86 and its rotor shaft 84 extends rearwardly through the plate to receive the pinion 83. As will be presently described, the rheostat has a double resistance connected one in series with the energizing winding of each of themagnetic clutches 40 and 41 and the arrangement is such that, as the bar 70 moves downwardly, as determined by the contour of cam 69 during its rotation and against opposition of spring 80, the rheostat is adjusted through operation of the rack and . pinion 82, 83 to control magnetization of the clutches in manner to increase the torque exerted on the 'mandrels 21, 24. On the other hand, when the vertical bar moves upwardly under influence of the spring 80 and likewise as determined by the contour of-cam 69 during its rotation, rheostat 85 is adjusted to decrease magnetization of the clutches and reduce the torque transmitted to the mandrels.

, The normal position of the cam 69 is determined by the engagement of a radial abutment 87 thereon with a fixed horizontal pin 88 extending rearwardly from the fixed plate 86. Normally, this position is maintained by a helical spring 89 encircling the shaft section 65 and which is attached one end to a fixed part 90 of the bracket support 61 and the other end to a flange 91 fixed to and which rotates integrally with the shaftsection 65' (Figs. land 4). u of the parts, the magnetic clutch 68 is energized so that as ';a"tape-wind-up operation is inaugurated, cam 69- is rotated in a'clockwise direction, lookingat-the parts from Also in the normal positionthe rear." Rotation of thecam in misdirection te'nsion's' the helical spring 89 and, of course, moves bar 70 downwardly as the radial dimension of the cam increases with a resultant increase in torque transmitted to the mandrels.

When the rolls of tape being wound upon the mandrels have reached a given size, operation of the machine is arrested. Clutch 68 is simultaneously de-energized, thereby elfecting disengagement between shaft sections 65 and 64. Upon such disengagement, shaft. section 65 and, consequently, cam 69 mounted thereon are restored.

to their normal positions, under the action of helical spring-89, by counter-clockwise rotation of. the cam until its, radially-disposed abutment 87 'engages the fixed pin 88. Alsoduringrestoration ofcam'69, bar 70 is likewise restored to its normal position by the reaction of[ correspond to the length of the rolls of tape the machine is set to handle at any given time. By using a reduction gear 62 with'ratio of that given number of revolutions to one, shaft 65 and, consequently, cam 69 are made to partake of one revolution for each cyclic period required to wind-up such a lengthof tape.

Attention should also be called to the fact that the' peripheral speed of guide roll 16 is also the same as the linear speed of travel of the web through the machine.1 Consequently, as regards to roll 16, a fixed number of:

revolutions of its shaft will correspond to the length of tape to be wound into rolls on the wind-up mandrels. Accordingly, in order to stop the machine automatically after a given length of tape has been wound on the mandrels, there is provided a counting mechanism 92 of any suitable type driven by chain 93 from a sprocket 94 on the shaft of roller 16 and which, when it has counted up a given number of revolutions representing the length of tape to be wound on the mandrel, serves to operate mechanism to stop operation of the machine and also to de-energize magnetic clutch 68, which in the manner previously described, operates to permit restoration of the cam member 69 to its normal position (Fig. 1).

Further assistance in understanding the operation of, the machine may be had by reference to the circuit dia-' gram shown in Fig. 7 and particularly in'Figs. 1 and 4. Therein it will be observed that there is a relay 95 whose winding is connected with one power line P through lead 96 and with return power line P by way of two paths, one through a normally-open button switch 97 and the other through normally-closed switch 98 in series with a pair of normally-open relay contacts 99 adapted to be closed when relay 95 is energized. Relay 95, when energized, also acts to close another pair of normally-open relay contacts 100 in series with a normally-closed switch Contacts 100 when closed establish an electrical circuit from power line P, through main driving motor 29 of the machine and through switch 101, when closed, to return power line P. Assuming that the leading ends of the slitted tape which stretch between the slitting knives 18 and the mandrels 20 and 23 have been attached to cores on the mandrels, button switch 97 is momentarily closed to inaugurate operation of the machine. .The closing of switch 97 establishes a connection through the winding of relay 95 which, when'energized, closes both pairs of its associated contacts 99 and 100. Closing of 1 relay contacts 99 establishes a holding circuit through relay 95, while closing of relay contacts 100 starts the driving motor 29.

It will also be recalled that magnetic clutch 68, in the i normal position of the parts, is energized to connect reduction gear 62 with control cam 69. For this purpose, I clutch. 68 isconnected between power leads P and B a through a pair of normally-closed contacts 102 associ ated with a relay 103 whose winding is connected be-. tween. power leads P and P through a normallyropen switch which conveniently may comprise a second pole 104 of the switch 101 if the latter be a double pole switch, and which is adapted to be closed to energize relay. 103 when switch 101 is moved to open thecircuit through the driving motor 29.

With this arrangmeent, the control cam 69 will rotate through its normal cycle upon inauguration oii machine operationthrough momentarily pressingbutton switch 97.

When counting device 92 has completed a cycle repre; senting the amount of tape to be wound; up into-rolls: on the cores located on the mandrel, it automatically but:

momentarily opens switches 98 and 101, which may be conveniently tied together for conjoint operation and closes the circuit through relay 1 03. The result is that motor 29 is stopped, the-holding circuit'throughrelay 95 is disestablished and the relay 1 03 operates to open contacts 102 in the energizing circuit of magnetic clutch 68 in the control camshaft. Clutch-control relay 103. has a time-delay factor, so that even though it is energized but momentarily, its: contacts 102 remain open long enough to permit cam 69 to be restored to its normal position in manner previously described beforesuch contacts close again to establish the energizing circuit through magnetic clutch 68.

In the circuit diagram (Fig. 7), the energizing windings of the variable torque magnetic clutches 40, 41 are represented by the coils withcorresponding legends; In

series with these coils are adjustable resistances- 85which representthe windings of rheostat 85. In other words,

variable resistances 85 are those which are varied underthe control of the cam 69 to control the torque-transmitted by clutches 40, 41 to their respective mandrels.

The magnetic- clutch windings 40, 41 are powered by direct current furnished through a bridge rectifier 105 connected by suitabletransformer bank 106 to the main power lines. The secondaries of the transformers 106 are adjustable to regulate the level of power transmitted to establish appropriate torque to effect the winding up of the tape, but once the general level of the torque has been established, the programmed variation inthe torque; which is the subject of this invention, is' controlled throughout the entire wind-up period asa result of-adjusting the rheostat 85 in-accordance with the contour of edge cam 69.

From what has been said it is apparent that any pro gram of tensioncan be wound into the rolls of tape merely by using, in the machine, a control cam 69 of the desired contour. apparatus of the present invention is particularly applicable for winding up rolls of tape pursuant to the programs delineated in said Patent 2,876,893 previously referred to.

The invention has been described in connection with one embodiment thereof, but many others are included In general, it might be said that thewithin its spirit. For instance, any apparatus which may during a winding cycle, means for pulling a givenlength of the material through the apparatus for, winding on the mandrel, an adjustable device presenting a pattern varying throughout a range of adjustment according to, a desired predetermined program of, tension for windingthe, given length; of material, throughout its .length, actuating, dc:

vices for' the; pulling means. and'.forthe adjustabledevicei including driving means common to. bothand. acting throughout said cycle correspondingly to advance: thegiven length of material through themachine and the adjustable device over said range, connections for'rotating the mandrel to wind thereon said given length oflmaterial and which include means-for transmittingan adjustable torque to the mandrel from said driving means, and means operable throughout said cycle under the control of the devicewhich presents the pattern for adjusting the torque transmittedby saidconnectionsto securethrough out the finished roll of material tensional characteristics in accordance with said predetermined program.

2. Apparatus forwinding material'into rollswithten-' sion according to a predetermined program, said apparatus including a mandrel on which the material is' woundduring awinding cycle, means for pulling a given length: of material through the apparatus for winding on the mandrel, an adjustable-cam device having acontrol surface presenting a pattern varying throughout a range of adjustment according'to a desired predetermined program of tension for winding the given length of material throughout its length, actuating devices for the pulling means and. for the adjustable cam device including driving means common to both and, acting throughout said cycle correspondingly to advance the given length of ma terial through the machine and the adjustable cam device over, said range, connections for rotating the mandrel to, wind, thereon said given length of material and which include meansfor transmitting an adjustable torque to the mandrel from said" driving means, and means operable throughout said cycle under the control'of' thev cam device which presents the pattern for adjusting thetorque, transmittedby said connections to secure throughout the.

finished roll of materialttensional characteristics in accordance with said predetermined program.

3. Apparatus for winding materialinto rolls with tension according to a predetermined program, said appara-, tus including a mandrel on which the material is wound during a winding cycle, means for pulling a given length. of the materialthrough theapparatus for winding on the: mandrel, an adjustable cam device having a control surface presenting a pattern varying throughout a range of adjustment according to a desired predetermined program means and for the adjustable, cam device including driving means common, to both and acting throughout said cycle correspondingly to advance the given length of material through the machine and the adjustable cam device. over said range, connections for rotating the mandrel to wind thereon said given length of material and which include means for transmitting an adjustable torque to; the mandrelfrom said driving means, and means operable throughout said cycle under the control of the cam device which presents the pattern for adjusting the torque trans-- mitted by said connections to secure throughout the finished roll of material tensional characteristics in accordance with said predetermined program, said cam device having an initial setting from which it is moved during thewinding cycle and means operable to reset the cam in itsinitial position after each winding cycle.

4. Apparatus for winding material into rolls with tension, according to, a predetermined program, said apparacluding driving means common to, both and acting; throughout. said; cycle.- correspondingly to advance thol of tension for winding the given length of material, throughout its length, actuating devices for the pulling,

given length of 'materialthrough the -r'n'achiiie' Tand the adjustable deviceover its range, connections for rotating the mandrel to wind thereon said given length of material comprising a clutch electrically energized and operable to transmit-'torque according-to the extent of the electrical energy supplied to it, and an electrical circuit through which said clutch' is energized under thecontrol of the device which presents the patterndefining the predeterin' d g a 5;;7', l l

5. Apparatus for winding material into rolls with tension according to a predetermined program, said apparatus including a mandrel on which the-material is wound during a winding cycle, means for pulling a given length of the material through the apparatus for winding on the mandrel, an adjustable device presenting a pattern varying throughout a range of adjustment according to a desired predetermined program of tension for winding the given length of material throughout its length, actuating devices for the pulling means and for the adjustable device including driving means common to both and acting throughout said cycle correspondingly to advance the given length of material through the machine and the adjustable device over said range, connections for rotating the mandrel to wind thereon said given length of material comprising a clutch electrically energized and operable to transmit torque according to the extent of the electrical energy supplied to it, and an electrical circuit in which said clutch is included together with a circuit element variable under the control of the device which presents the pattern defining the predetermined program to regulate the electrical energy transmitted through the circuit to the clutch.

6. Apparatus for winding material into rolls with tension according to a predetermined program, said apparatus including a mandrel on which the material is wound during a winding cycle, means for pulling a given length of the material through the apparatus for winding on the mandrel, a cam device having a surface configuration varying in accordance with a predetermined program of tension under which the material is to be wound throughout its given length during the winding cycle, driving means for said pulling means and for the cam device continuously and positively to adjust said cam device throughout said cycle proportionally to the travel of said 'given length of material through the machine, connections for rotating the mandrel to wind thereon said given length of material comprising a clutch electrically energized and operable to transmit torque according to the extent of electrical energy suppliedito it, and an electrical circuit in which said clutch is included together with a circuit element variable under the control of the cam device to regulate the electrical energy supplied to the clutch.

7. Apparatus for winding material into rolls with tension according to a predetermined program, said apparatus including a mandrel on which the material is wound during a winding cycle, means for pulling a given length of the material through the apparatus for winding on the mandrel, a cam device having a surface configuration varying in accordance with a predetermined program of tension under which the material is to be wound throughout its given length during the winding cycle, driving means for said pulling means and for the cam device continuously and positively to adjust said cam device throughout said cycle proportionally to the travel of said given length of material through the machine, connections for rotating the mandrel to wind thereon said given length of material'comprising a clutch electrically energized and operable to transmit torque according to the extent of electrical energy supplied to it, and an electrical circuit in which said clutch is included together with a circuit element variable under the control of the cam device to regulate the electrical energy supplied to the clutch, said connections for rotating the 10 mandrel including 'a' rotatable shaft from which "also is? d'rivenashaft by which the'carn device is adjusted. '8.Apparatus forwindingmaterial into rolls with ten-- sion according to'a predetermined program, said app ara-' tus including a mandrel on-which the material is wound during a winding cycle,means for pulling a given length ofthe material through the apparatus for Winding on the mandrel, 'a' cam device having a surface configuration varying in accordance with a predeterminedpro-- gram of tension under which the material is to be wound throughout its given length during the winding cycle, driving means for said pulling means and for the cam device continuously and positively to adjust said cam device throughout said cycle proportionally to the travel of said given length of material through the machine, connections for rotating the mandrel to wind thereon said given length of material comprising a clutch electrically energized and operable to transmit torque according to the extent of electrical energy supplied to it, and an electrical circuit in which said clutch is included together with a circuit element variable under the control of the cam device to regulate the electrical energy supplied to the clutch, said connections for rotating the mandrel including a rotatable shaft, means for driving the cam from said shaft including a normally engaged clutch, and means for disengaging said clutch at the end of a winding cycle.

9. Apparatus for winding material into rolls with tension according to a predetermined program, said apparatus including a mandrel on which the material is wound during a winding cycle, means for pulling a given length of the material through the apparatus for winding on the mandrel, a cam device having a surface configuration varying in accordance with a predetermined program of tension under which the material is to be wound throughout its given length during the winding cycle, driving means for said pulling means and for the cam device continuously and positively to adjust said cam device throughout said cycle proportionally to the travel of said given length of material through the machine, connections for rotating the mandrel to wind thereon said given length of material comprising a clutch electrically energized and operable to transmit torque according to the extent of electrical energy supplied to it, an electrical circuit in which said clutch is included together with a circuit element variable under the control of the cam device to regulate the electrical energy supplied to the clutch, said connections for rotating the mandrel including a rotatable shaft, means for driving a shaft by which said cam device is adjusted from said rotatable shaft and including a normally engaged clutch, means for disengaging the clutch, and resilient means operating to restore the cam adjusting shaft to its normal position upon disengagement of said clutch.

10. Apparatus for winding material into rolls with tension according to a predetermined program, said apparatus including a mandrel on which the material is wound during a winding cycle, means for pulling a given length of the material through the apparatus for winding on the mandrel, means operable to terminate the winding cycle, a cam device having a surface configuration varying in accordance with a predetermined program of tension under which the material is to be wound throughout its given length during the winding cycle, driving means for said pulling means and for the cam device continuously and positively to adjust said cam device throughout said cycle proportionally to the travel of said given length of material through the machine,

connections for rotating the mandrel to wind thereon said given length of material comprising a clutch electrically energized and operable to transmit torque according to the extent of electrical energy supplied to it, an electrical circuit in which said clutch is included together with a circuit element variable under the control of the cam device to regulate the electrical energy su- References Cited in: the file; of this patent UNITED STATES, PATENT S Hempelmann Mar. 4, 19-13 Simonds. Mar. 19, 1940 Futtle et al.. Dec. 15,1942 Carter Oct. 12, 1943 Fodor Dec. 26, 1944 Hornbostel Jan. 1, 1946

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