US3250483A - Unwind or backstand for web winding apparatus - Google Patents

Description

May 10, 1966 w. G. PRiNTz ETAL 3,250,483

UNWIND OR BACKSTAND FOR WEB WINDING APPARATUS Filed Oct. 16, 1963 4 Sheets-Sheet 1 H6. f /m 'la .-41 41 52 1% 1o I 74a s?. f a8 @5| "n .I 90 i gif---nl "-:tii' I BQ 44 5- 5 35, /81 I x M44 30) i L i 'L4 i 1 .l 1

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h/AQEEA/ PEM/rz Aff/55e C? /Vi/vcaf ATTORNEY UNWIND 0R BACKSTAND FOR WEB WINDING APPARATUS Filed oct. 16, 1963 May 10, 1966 w. G. PRINTZ ETAI.

4 Sheets-Sheet 2 INV ENTOR Mea-w62 Aem/rz *iv/ATTORNEY May 10, 1966 w. G. PRINTZ ETAL 3,250,483

UNWIND OR BACKSTAND FOR WEB WINDING APPARATUS Filed 00T.. 16, 1965 4 Sheets-Sheet 5 l/ /////l//////////////////////// /////////l ATTORNEY May 10, 1966 W. G. PRINTZ ETAL UNWIND 0R BACKSTAND FOR WEB WINDING APPARATUS Filed Oct. 16, 1963 4 Sheets-Sheet 4.

INV ENT ORS ith/@65N P/e/Nrz Afa/55e C. /Vfwca/w ATTORNEY UnitedStates Patent O "ice 3,250,483 UNWIND R BACKSTAND FOR WEB WINDNG APPARATUS Warren G. Printz, Middletown, and Huber C. Newcomb, Franklin, Chio, assignors to Diamond International Corporation, a corporation of Delaware Filed Oct. 16, 1963, Ser. No. 316,636 9 Claims. (Cl. 242-65) This invention relates to an improved unwind stand or backstand which is an essential auxiliary of a web winding machine.

Generally speaking, stock material is received from the manufacturer as a relatively huge parent roll and during production of various products such as adding machine tape, letterheads, toilet tissue, etc. the parent roll ot web material is unwound and wound into narrower new rolls on a slitter-winder machine.

The present invention pertains to the apparatus facilitating the unwinding of a web from a stock material from a parent roll and to various control mediums incorporated therein. While the separate control mediums have a specific function in the apparatus, they combine to provide a mutual sensitivity to regulate and smooth out unevenness of the suuply web which is being unwound.

As a web of stock material is drawn by Winder drums on Winder apparatus and caused' to be wound into new rolls, unequal internal tensions in the parent roll are released to cause iiuctuations in tension of the supply web between the backstand and the slitter-winder apparatus. Irregular and oval shaped parent rolls often contribute to the diihculties of controlling and unwinding web, since the payout rate of the supply web varies continually throughout each revolution, causing the web to be tugged or jerked.

A primary object o the present invention is directed to a versatile combination of relatively simple controls to dissipate and compensate for irregularities and tension normally present in a supply or parent roll.

inasmuch as the Winder machine or slitter-winder apparatus and backstand are complementary, one to the other, i.e. they function simultaneously as a unit, the present invention comprises means for driving the backstand in relation to the Winder or slitter-winder speed control drum. The relationship of a means for driving the backstand and the winder speed control drum is apparently essential inasmuch as the speed control drum of the Winder machine determines the rate at which the web is rewound into new rolls. The web material must be wound or payed out from the parent or supply roll at the rate of demand set by the Winder speed control drum.

A more speciic object is to provide a payout drum on the backstand over which the supply web is drawn and to provide a belt drive from the Winder speed control drum utilizing cone drive pulleys whereby there is incorporated in the apparatus means to establish a relationship between the rates of wind-up and the rate of payout, which dilference of rates is caused by the stretching and smoothing out that occurs over the entire unwound portion of the supply web.

A further object of the present invention is to provide in a driven backstand payout drum means to maintain a constant nip pressure between the parent of supply roll so that the parent roll can be rotated without slippage at an exact demand rate determined by the surface speed of the driven backstand drum. In this regard, the linear contact pressure, or nip pressure between the backstand drum and the parent or supply roll prevents any tendency the material may have to wrinkle while unwinding, and the backstand drum is of 3,256,433 Patented May 10, i966 a character to provide a liberal over-wrap on the surface thereof which effects a smoothing out of the supply web and accordingly prevents creases from forming therein.

An additional object of the present invention is to provide in a backstand means whereby reverse winding on a rewinding machine is permit-ted and yet the backstand payout drum rotates in a single direction regardless of direction of Winding on the rewinder to permit the operator to determine which surface of a supply web will comprise the outer surface on new rewound rolls.

A further object of the present invention, in conformance with that set forth above, is to provide means for maintaining a constant direction of rotation of a driven payout drum of a backstand by utilizing a reversing gear connected to the backstand drum and its cone pulley drive.

The present invention, it will be observed, accordingly eliminates the necessity for friction brakes which have been commonly used to retard supply or parent roll payout, thus eliminating malfunctions which might occur due to incorrectly adjusted brake shoes, as well as eliminating frequent renewal of brake linings, cooling of the brakes to dissipate heat, etc.

A further object of the present invention is to provide an extremely simple. differential draw control which constantly corrects the tendency of the tension to occur in a supply web to accordingly afford regular payout of the parent or supply roll by maintaining a delicate balance between the tension, the retarding force due to an applied load between the parent o1' supply roll and a payout drum, and the amount of driving effort supplied to the parent or supply roll.

Another object of the precent invention is to provide an extremely simple diterential draw control which lends itself to being controlled at a remote control console.

A further object of the present invention is to provide a relatively simple differential draw control which lends itself to being readily understood by an operator of the apparatus, permitting him to quickly acquire the ski ls necessary to process web materials of different consistencies and caliper thicknesses.

Another object of the present invention in conformance with that set forth above is to provide a readily adjustable nip pressure at the outer surface of a parent or supply roll by means of a driven payout drum, and provides means whereby a pressure regulator at a control console will readily indicate to an operator controlling the backstand the amount of pressure being applied and further provides means whereby the nip pressure can be readily, adjusted and changed.

Another object of the present invention is to provide a controllable nip pressure at a supply roll whereby the nip pressure may be readily changed for different materials of different caliper thicknesses and surface smoothness, and to some extent, adjustments may he made in relation to the unevenness, irregularities and/or internal tension which may occur in the parent or supply roll being initially wound.

The diierential rate of payout and rate of Wind-up will depend in part upon the consistency of the material, its proneness to stretching, and its resistance to tearing, due to the tension of draw. The greater the resistance is, the larger will be the share of driving etfort supplied by the web itself to cause the parent or supply roll to rotate. This load-sharing feature is particularly useful during acceleration and deceleration since a belt drive supplies both the additional torque required during speed up of the parent roll as well as the gradual increasing of the retarding force during leveling olf of speed and stopping of the parent or supply roll. v

A still further object of the present invention is to provide a` drive for a backstand or unwind stand which facilitates initial threading of a supply web over various carrier rolls prior to starting the wind-up operation, this drive being particularly useful when handling relatively tine or thin materials such as tissue paper or the like, and accordingly permits a parent or supply roll to be 1'0- tated relatively slowly to pay out the web as required and subsequently after the supply web has been threaded and Wrapped on a winder core shaft, the differential draw control may be readily adjusted to draw the web to its desired tension suitable for winding, slitting, etc.

And a still further object of the present invention is to provide in an unwinding stand or backstand means for continuously oscillating or shuffling the supply web transversely of its direction of payout to accordingly promote easier payout and in order to equalize internal tension and further afford an interweaving action of relatively thick and thin bands in a supply web to prevent corrugation of the rewound roll.

These, together with other specific objects, and the nature and advantages of the instant invention Will become apparent from the following description taken in conjunction With the accompanying drawings forming a part thereof, wherein:

FIG. 1 is a top plan view of the unwind stand or backstand, showing a parent or supply roll disposed thereon;

FIG. 2 is a side elevation of the unwind stand or backstand showing the supply Web in phantom lines;

FIG. 3 is an enlarged side elevation showing a portion of FIG. 2 in greater detail;

FIG. 4 is a fragmentary vertical section taken substantially on the plane of line 4-4 of FIG. 3;

FIG. 5 is a fragmentary top plan View, on a reduced scale, showing the pulley drive of the unwind stand or backstand in relation to the cooperating portions of Winder apparatus with which the unwind or backstand is used;

FIG. 6 is a side elevation of the belt drive of the apparatus taken essentially on the plane of lines 6-6 of FIG. 5;

FIG. 7 is a fragmentary end elevation looking essentially from left to right at FIGS. 1 and 2 showing a modified backstand and showing mechanical means for oscillating or shuffling the supply web being payed out;

FIG. 8 is a horizontal section taken substantially on the plane of line 8 8 of FIG. 7; and

FIG. 9 is an enlarged, fragmentary vertical section taken substantially on the plane of line 9-9 of FIG. 8, and showing in detail the roller supports for the modified backstand frame.

Referring to the drawings in detail, and first considering FIGS. 1 and 2, a backstand is indictaed generally at 10 and may be described as a single drum, reel type, surface unwind stand.

The backstand 10 comprises Vertical side frame members 12 and 14 secured together in any suitable manner, these details not being shown. Iournalled on the side frame members 12 and 14 by means of suitable bearings 16 and 18, respectively, is the shaft of a payout or driving drum means 22. The payout drum will have a surface of a suitable character and will be power driven in a manner to subsequently be described in detail.

The support frames 12 and 14 each include on the upper edge thereof mutually parallel tracks 24 and 26, respectively, which comprise pairs of inwardly opening channels 28 and 30 (see FIG. 4). The tracks reciprocably support saddle carriage means `comprising carriages 32 and 34. Inasmuch as both of the carriages are identical, only carriage 34 will be described in detail. The carriage 34 includes a base 36 having a depending portion 3S which has extending transversely therethrough a pair of spaced parallel support shafts 40 which have journalled on opposite ends thereof wheel or roller elements 42 and 44 received in the channels 28 and 30, respectively (see FIG. 1).

Base 36 includes upper opposed ange lip portions 46 and 48 which reciprocably or adjustably support an upwardly opening bearing or saddle element 50 which includes a lower portion flanged at 52 and 54 (see FIG. 3) respectively, received and retained by the iiange lip portions 46 and 4S. The saddle 50 (see FIG. 4) includes a depending portion 56 which is transversely threaded at 58, receiving therethrough a transverse, externally threaded shaft 60 journalled at opposite ends in the base 36. The shaft 60 includes on the end 62 thereof a manually engageable handle 64. The saddles 50 may be adjusted transversely of the rails or the upper edges of the frames 12 and 14. This particular function permits the supply roll or parent roll to be properly oriented with respect to the payout drum or roll 22. Only the front saddles 32 and 34 are adjustable, the support for the drum or roll 22 being free to slide toward the saddles 32 land 34.

Indicated generally at 66 is a parent roll or drum of web material which is to be rewound. As is known to those skilled in the art, one surface or the other of the supply roll may have a finish different from the other, and thus the unwind or backstand must have suflicient versatility to permit unwinding of the parent or supply roll and subsequent rewinding with either the inner or outer surface exposed, depending upon the condition of the material.

The parent roll 66 includes a plurality of convolutions 68 wound on a suitable core 70 having acentral shaft 72 received in the upwardly opening saddle elements or bearings 50.

Extending longitudinally of the vertical support frames 12 and 14 are suitably mounted fluid motor means Acomprising uid motors 74 and 76, respectively, which are independently adjustable or controlled from a remote console by the operator of the apparatus. Only one of the uid motors will be described in detail. However, the fluid motors 74 and 76 may be pneumatic or hydraulically operated, and each includes a force transmitting piston rod or shaft 78 which pivotally is connected at 80 to a suitably apertured portion of the depending portion 38 of the base 36 of the carriages 32 or 34.

As the payout drum 22 is rotated in a clockwise direction, as indicated by the direction arrow in FIG. 2, peripheral or nip engagement of the drum 22 with the parent roll or supply roll 66 will cause the web material thereon to be frictionally payed out. The remote console (not shown) will include means for operating the fluid motors 74 and 76 and will include thereon directional valves, pressure regulators, pressure gauges, etc. and thus, depending upon the caliper of the web material, in-

ternal tension caused during winding, etc. can be controlled, as mentioned in detail with respect to the objects of the invention. The nip pressure or point of tangential engagement between the driving or payout drum 22 and the supply roll l66 may be so controlled as to maintain the desired tension in the supply web W which will be received at the rewinding or winding apparatus (not shown), with which the backstand will be used; this permits control of the tension lapplied to the web. The positive control at the nip pressure will permit an operator of the apparatus to compensate for the irregular or oval shape of the supply parent rolls and substantially eliminate tugging and jerking of the web W as it is being payed out. Further, a tremendous variation may occur in the different types of web material that are being rewound on the present apparatus; for example, the apparatus may be used to rewind toilet tissue, newsprint, bond letterhead papers, etc. Through the use of controlled nip pressure, the backstand has infinite versatility with respect to different materials that are to be payed out therefrom and if the web is particularly strong, less effort need be applied to the payout drum since the parent roll can be partially rotated by free web tension.

y Mounted on the support stand frame members 12 and 14, indicated generally at'82, is a single carrier roll cornprising a cylindrical roll member or element 84 extending transversely of the path of movement of the web W and including a longitudinal shaft 86, one end 8S thereof being journalled in a bearing 90. The bearing is supported on a shaft 92 (see FIG. l) which is rotatably supported in a bearing 94 at the end of the frame member 12. The opposite end 96 of the shaft 86 is journalled in a bearing 98 connected to an externally threaded shaft 100 (see FIG. 2) including a handle 102 lixed to the upper end. The shaft 100 is threadedly engaged in an internally threaded sleeve 104 fixed to the end of the vertical-frame member 14.

Rotation of the handle 102 causes raising or lowering of the shaft end 96 to accordingly adjust for a slack in the web W.

Referring to FIGS. S and 6, indicated generally at 106, is a belt drive assembly for the backstand 10 which is shown fragmentarily in FIG. 5. A two-drum Winder is indicated diagrammatically at 108 and includes, in addition to other cooperating structure (not shown), a motor 110 having a drive shaft 112 connected to a reduction gearing assembly or transmisison 114 connected to a power shaft 116. The power shaft 116 which is connected to a shaft 120 of a speed control drum 122 of the Winder 108 has lixed thereto a tapered or cone pulley 118-. The drum 120 of the Winder is placed parallel to a second drum or roller 122 with their surfaces spaced approximately l inch apart. Supported on these drums and frictionally driven thereby, is a core 124 upon which a rewound roll is formed.

The belt drive assembly 106 includes adjacent the backstand 10 and laterally thereof a suitable support 125 upon which is mounted a pair of bearings 126 and 128 rotatably supporting a shaft 130 parallel to the shaft 116 and having fixed thereon a tapered or cone pulley 132. The pulley 132 is in substantial coplanar relation to the pulley 118; however, the taper thereof is reversed with respect to the pulley 118, and thus these pulleys may be described as being reversed, tapered pulleys.

Inasmuch as the speed of the control drum 120 determines the rate at which the web W is wound into new rolls, the supply of web material must be unwound or payed out from the supply roll 66 at the rate of demand set by the Winder drum 120.

This is achieved through the utilization of the belt driven payout drum 22 on the backstand over which the supply web is drawn and the cone or tapered drive pulleys establish a relationship between the rate of wind up and the rate of payout, the difference of rates being caused by the stretching and smoothing out that occurs over the entire unwound portion of the web W.

By maintaining contact between the payout or driven backstand drum 22 and the supply or parent roll 66 through the utilization of the fluid motors 74 and 76, the exact amount of loading at the nip or point of engagement therebetween results in the supply roll being rotated without slippage and at the exact demand rate determined by the surface speed of the driven unwind drum or payout drum 22.

The linear or line contact at the nip betwen the payout drum 22 and the parent roll 66 prevents any tendency the material may have to wrinkle while unwinding, and the liberal overwrap on the surface =of the payout drum 22 provides a smoothing out effect and prevents creases from starting.

The transmission 114 is reversible and accordingly the drum 120 may be rotated either clockwise or counterclockwise to accordingly impart on the core 124 different directions of rotation. The reason for this reversibility is to afford the winding of either the inner or outer surface of the web W onto the core 124. This versatile and reversible feature is necessary inasmuch as certain web materials have different finishes on one side as cornderart pared with the other. However, the payout drum 22 will be rotated in a clockwise direction, i.e. that indicated by the direction arrow in FIG. 2, for example.

In order to attain a constant direction of rotation of the payout drum 22, interposed between the shaft 130, upon which the cone pulley 132 is mounted and the shaft 20 of the pay-outd rum 22, is a transmission 134 which will have reversing gears therein (not shown) which reversing gears Will be engaged or disengaged depending upon the direction of rotation of the driven roll or drum 120 of the Winder 108.

Indicated generally at 136 is a power operated belt shifter comprising a pair of vertically extending roller elements 138 and 140 supported on a suitable carriage 142 and engageable with the outer edges of a drive belt 144 entrained over the pulleys 118 and 132. The carriage 142 is connected to a shaft 146 threaded into a suitable transmission 148, the transmission 148 being driven by a motor 150.

In order to shift the belt axially of the pulleys 118 and 132 to attain different driving ratios, the rollers 138 and are moved `parallel to the axis of rotation of the pulleys to accordingly shift the belt.

Briey referring to the reversibility feature once more, `the web W will pass vertically between the rolls 120 and 122. Assuming the roll or drum 120 is rotating clockwise as indicated by the solid direction arrow thereon, the roll 122 will likewise rotate clockwise. Further, the core 124 will rotate counterclockwise; thus the inner surface of the supply roll 66 will remain the inner surface on the rewound roll formed on the core 124.

However, if the roll 120 is reversed as indicated by the dotted direction arrow, this causes reverse rotation of the roll'122 andY core 124 (see dotted direction arrows), and thus the roll being rewound on core 124 will have the inner surface as unwound from supply roll 66 exposed as the outer surface on rewound roll 124.

Referring to FIGS. 7-9, all of the components described in detail with respect to the backstand 10 are provided on the backstand 210 and thus only the lower portion of the modilied backstand 210 is disclosed in The modified backstand 210 includes vertical support members 212 and 214 to which are secured a plurality of transverse plates 216, 218, 220, 222, 224 and 226, respectively connected and integrated by rods 228, 230 and 232. The plates 216-226 have secured by means of machine screws 234 or the like a bearing element 236 received on a roller 238 including a lateral shaft 240 carried on a support plate 242 integral with a base or support plate 244.

The frame member 214 includes at one side thereof a mounting or draft element 246 pivotally connected at 248 to an oscillating shaft 250 driven by a transmission 252. The transmission 252 includes power input shaft 254 having a pulley 256 mounted thereon and driven by a belt 258 which is entrained over a drive pulley 260 mounted on a shaft 262 of a suitable motor 264.

Rotation' of the shaft 254 causes reciprocation of the shaft or connecting element 250 and a predetermined period of oscillation is caused whereby the entire backstand frame is oscillated or shuled with respect to a drum by means of which a roll is being rewound. This oscillation or reshuling the web laterally with respect to a drum upon which a web is being rewound promotes easier payout of the web, distributes internal tensions in the web and causes an interweaving action of relatively thick and thin bands in a mass' produced web to prevent corrugation of the rewound or new roll.

Briey in review, the supply or parent roll 66 is disposed on the saddles 50. Through the adjustment of the handle 64,*the vsaddles 50 are adjusted transversely to properly orient the supply or parent roll with respect to the payout drum 22. Excessive slack can be taken up by means of the carrier roll 84 and the nip pressure or back pressure between the supply roll and the payout 7 drum 22 may be readily adjusted by means of operating the fluid motors 74 and 76. l

Reverse winding is permitted for the use of the disclosed backstand inasmuch as a reversible transmission 134 is provided wherein the payout drum 22 always rotates in a clockwise `or constant direction.

Through the use of the belt drive assembly 106, relatively thin caliper materials, such as tissue paper or the like, may be readily threaded from the backstand onto rewinding apparatus. The exact amount of drag or back pressure imposed by means of the fluid motor means '74 and 76 results in control without slippage between the payout drum 22 and the supply or parent roll 66. Further, linear or nip contact with controlled pressure between the payout drum and the parent roll prevents the material from wrinkling while unwinding and tends to smooth out the web being payed out.

Inasmuch as the backstand provide-s an extremely simple differential draw control, which constantly compensates for tension in the web to cause the regular payout from the parent roll, a delicate balance between the tension and the retarding force, due to applied load between the parent roll and the payout drum, can be supplied by the drive belt assembly 106. The differential speed relationship between web payout rate and wind-up rate is directly indicated and adjustable at a remote console. The present design eliminates the need for friction brakes, constant tension devices and spring loaded tension relieving rolls, and further there are no malfunctions due to disadjusted brake shoes, and there will be no necessity for renewing brake linings or using cooling means for dissipating heat in positively acting brakes.

A relatively simple design of the backstand will permit an operator to quickly acquire the skills necessary to process web material of different `consistencies and caliper thicknesses. Further, by the adjustment of the nip pressure between the outer surfaces of the parent roll and the payout drum at a control console, a suitable calibrated pressure gauge will clearly indicate to the operator the nip pressure being applied and he will readily be able to ascertain a range of nip pressures generally applicable to particular web materials. The amount of nip pressure that will be applied in order to obtain an even payout will depend largely upon the caliper thickness and surface smoothness of the material and, to some extent, on how even the parent roll was initially wound and the amount of internal tension in the parent or supply roll. Further, the proneness of the material to stretch and its resistance to tearing, due to tension when drawn from the parent roll will, in a sense, determine the difference in the rate of payout and the rate of wind-up at the rewinding apparatus. The greater the resistance is, the larger a driving effort can be supplied by the web itself to cause the parent or supply roll to rotate, i.e. a greater tension -can be applied -to a relatively tough web as compared with one that is relatively weak in tension.

The load sharing feature is particularly useful during acceleration and deceleration since the belt drive `supplies both the additional torque required during speed up and the gradual increasing retarding force during leveling E and stopping of the parent roll. It is readily apparent that when operating with a relatively large and kheavy paren-t roll, a considerable amount of inertia force exists once rotation of the parent roll is initiated.

Further, the belt driveprovides a ready means to facilitate initial threading of the web over various carrier rolls of the rewinding apparatus prior to starting a windup cycle. This is particularly useful when handling a very fine material such as tissue paper since the parent roll can be rotated very slowly, manually or by using the driving motor, to payout the web as required. After the web has been threaded and wrapped on a Winder core shaft, the differential draw control is adjusted to draw the web to the desired tightness suitable for winding.

Additionally, web materials of irregular caliper thickness can be very successfully rewound by oscillating the backstand and thus in a sense shuffling the convolutions of the newly formed roll. This action promotes easier payout and bet-ter distribution of internal tension in the newly formed roll by causing an interweaving action of relatively thick and thin bands and will prevent corrugation of the new roll.

It will be obvious to those skilled in the art that various changes may be made without departing from the scope of the invention and therefore the invention is not limited to what is shown in the drawings and described in the specification but only as indicated in the appended claims.

What is claimed is:

1. ln an unwind stand for paying out a supply web, payout drum means supported on a horizontal axis of rotation, carriage saddle means including a supply roll support defining an axis of rotation substantially parallel to that of said payout drum means, said carriage-saddle means being mounted for movement toward and away from said payout drum means, fluid pressure-controlled, force-transmitting means connected to said saddle carriage means for urging-said carriage-saddle means t0- ward said payout drum means for obtaining a controlled nip pressure between said payout drum and a supply roll, a belt drive operatively connected to said driving drum for rotating the same, and reversing gear means interposed between said belt drive and said payout drum means for rotating said driving drum means in the same direction for alternate directions of movement of said belt drive. l

2. The structure of claim 1, in which said unwindk stand includes a support frame including spaced, parallel track elements, said carriage-saddle means comprising a pair of carriages displaceably supported on said track elements.

3. The structure of claim 1, including a web-carrier roll supported on an axis of rotation substantially parallel to the axis of rotation of said payout drum means and down stream thereof, and vertical adjusting means connected to said web-carrier roll for controlling the tension of the supply web being payed out.

4. The structure of claim 1, in which said belt drive includes reversed, cone pulleys, a driving belt entrained over said cone pulleys, one of said cone pulleys being operatively connected to said payout drum means through said reversing gear means, and a power-driven shaft connected to said othercone pulley.

5. The structure of claim 1 including mechanical belt shifting means operatively connected to said belt drive.

6. In an unwind stand for paying out a supply web, payout drum means supported on a horizontal axis of rotation, carriage saddle means including a supply roll support defining an axis of rotation substantially parallel to that of said payout drum means, said carriage-saddle means being mounted for movement toward and away from said payout drum means, fluid pressure-controlled, force-transmitting means connected to said saddle carriage means for urging said carriage-saddle means toward said payout drum means for obtaining a controlled nip pressure between said payout drum and a supply roll, said unwind stand comprising a displaceably mounted support frame upon which said payout drum, carriage saddle and force transmitting means are mounted, and power means connected to said support frame for oscillating said frame periodically and transversely of t-he plane at which a supply web is payed out.

7. The structure of claim 6in which said support frame includes support rollers journalled on the lower end it-hereof and on axes of rotation normal to that of said drivingdriven means, and said power means comprising auxiliary.

motor means for oscillating said frame and shuffling said supply web.

8. The structure of claim 2 in which fluid pressure means comprises a pair of independently operable uid motors independently controlling said carriages and independently urging the carriages toward said payout drum means for controlling nip pressure at opposite ends of a supply roll of web material.

9. In an unwind stand for paying out a supply web, payout drum means supported on a horizontal axis of rotation, carriage saddle means including a supply roll support defining an axis of rotation substantially parallel to that of said payout drum means, said carriage saddle means being mounted for movement toward and away from said payout drum means, iiuid pressure-controlled, force-transmitting means connected to said saddle carriage means for urging said carriage-saddle means toward said payout drum means for obtaining a controlled nip pressure between said payout drum and a supply roll,

said unwind stand including a support frame including spaced, parallel track elements, said carriage-saddle means-comprising a pair of carriages displaceably supported on said track elements, and manual adjusting means connected between said carriages and said track elements forvtransversely orienting a supply roll on said carriages with respect to the direction a web is payed out.

References Cited bythe Examiner UNITED STATES PATENTS 2,569,797 10/ 1951 Campbell 242-65 2,703,683 3/1955 Evans et al 242-65 3,103,321 9/1963 Jilek 242-65 MERVIN STEIN, Primary Examiner.

Claims (1)

1. IN AN UNWIND STAND FOR PAYING OUT A SUPPLY WEB, PAYOUT DRUM MEANS SUPPORTED ON A HORIZONTAL AXIS OF POTATION, CARRIAGE SADDLE MEANS INCLUDING A SUPPLY ROLL SUPPORT DEFINING AN AXIS OF ROTATION SUBSTANTIALLY PARALLEL TO THAT OF SAID PAYOUT DRUM MEANS, SAID CARRIAGE-SADDLE MEANS BEING MOUNTED FOR MOVEMENT TOWARD AND AWAY FROM SAID PAYOUT DRUM MEANS, FLUID PRESSURE-CONTROLLED, FORCE-TRANSMITTING MEANS CONNECTING TO SAID SADDLE CARRIAGE MEANS FOR URGING SAID CARRIAGE-SADDLE MEANS TOWARD SAID PAYOUT DRUM MEANS FOR OBTAINING A CONTROLLED NIP PRESSURE BETWEEN SAID PAYOUT DRUM AND A SUPPLY ROLL, A BELT DRIVE OPERATIVELY CONNECTED TO SAID DRIVING DRUM FOR ROTATING THE SAME, AND REVERSING GEAR MEANS INTERPOSED BETWEEN SAID BELT DRIVE AND SAID PAYOUT DRUM MEANS FOR ROTATING SAID DRIVING DRUM MEANS IN THE SAME DIRECTION FOR ALTERNATE DIRECTIONS OF MOVEMENT OF SAID BELT DRIVE.

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