US2653643A - Apparatus for uncoiling sheet metal - Google Patents

Description

Sept. 29, 1953 H, D. MILLER ET AL 2,653,643

APPARATUS FOR UNCOILING SHEET METAL Filed Sept. 19, 1951 3 Sheets-Sheet l an r 27 A ZPE- HARVEY o. MILLER JOHN c. HOLDGATE ATTOR EY IN VENTORS p 1953 H. D. MILLER ET AL APPARATUS FOR UNCOILING SHEET METAL A 3 Sheets-Sheet 2 Filed Sept. 19, 1951 INVENTORS MILLER HOLDGATE HARVEY D. JOHN c.

BY M

ATTORNEY P 29, 1953 H. D. MILLER El AL 2,653,643

APPARATUS FOR UNCOILING SHEET METAL Filed Sept. 19, 1951 3 Sheets-Sheet 3 INVENTOR HARVEY D. MILLER JOHN C. HOLDGATE ATTORNEY Patented Sept. 29,1953

APPARATUS FOR UNCOILING SHEET METAL Harvey D. Miller, Youngstown, and John O. Holdgate, Cortland, Ohio, asslgnors to The McKay Machine Company, Youngstown, Ohio,

a corporation of Ohio Application September 19, 1951, Serial No. 247,282

This invention relates to the art of uncoiling metal strip and mor particularly to improved apparatus of a simplified nature which is operative to pay off metal strip from coils thereof in such manner that the normal formation of coil breaks is effectively avoided.

The primary object of the invention is the provision of vastly simplified yet entirely practical apparatus for advantageously making use of the heretofore known method of avoiding th formation of coil breaks in uncoiling sheet metal which consists of rigidly confining transversely the metal of the strip at the exact point of its departure from the coil proper and of either maintaining the paid-off strip in substantial tension or cold Working the strip by flexing it reversely about a working roll before the strip is completely stress relieved as in a roller leveler, for example, before its utilization in a drawing press, for example. To carry out this method of uncoiling it has been heretofore proposed to apply a working roll in pressure engagement with the outer periphery of the coil from which strip is to be extracted, the strip being directed to leave the coil proper along the line of contact of theworking roll with the coil, and. because of the difficulty of maintaining the leading end portion of the strip piece when lying between the coil and the leveler under tension it is highly desirable to severely stress the strip by severe flexing about the working roll to thus effect a preliminary working of the strip sufficient to destroy its propensity to coil break before being fully processed in the roller leveler.

In the apparatus of the present invention the above outlined advantageous method of uncoiling metal strip is retained but the apparatus required possesses, in addition to its simplification, the improved operating characteristics of automatically regulating the pressure applied by the working or take off roll on the outer periphery of the coil in accordance with the needs of the particular material being handled and of insuring the application of sufficient tension to the strip to avoid the formation of coil breaks in the strip during its passage from the coil to the roller leveler or other strip working or utilization equipment. 7

Another object of the present invention is the provision of an uncoiling machine having the above enumerated advantageous characteristics and which in addition incorporates certain novel features of construction and operation whereby the operation of threading a coil of material into an associated processing machine, for example, is greatly facilitated and hastened.

16 Claims. (Cl. 153-54) The above and other objects and advantages of the invention will become apparent upon consideration of the following detailed specification and accompanying'drawing wherein there is disclosed a certain preferred embodiment of the invention.

In the drawing:

Figures 1 and 2 are plan and end views, respectively, of an uncoiler constructed in accordance with the principles of our invention;

Figure 3 is a sectional view taken along the line III-HI of Figure 2;

Figure 4 is a schematic showing of the principles of operation of the uncoiler of Figures 1 through 3;

Figure 5 is a front elevation of a second embodiment of our invention with parts broken away generally as is indicated by line V-V of Figure 6;

Figure 6 is a side elevation of the apparatus of Figure 5;

Figure 7 is a fragmentary section view taken along line VII-VII of Figure 5;

Figure 8 is a fragmentary section view of the apparatus of Figur 5 taken generally along line .VIIIVIII of Figure '7; and

Figure 9 is a schematic representation of a novel method of threading strip material into an associated processing machine, for example, as is taught by our invention.

As shown in the drawing, the apparatus of our invention may comprise a base structure It on which is mounted a pair of spaced, parallel, and upstanding housings II and I2 in each of which is formed an inclined slot l3 constituting a guide r for the sliding movement of a bearing chock l4.

Journaled in the chocks 14 are the end portions or necks of a roll I5 which will be referred to herein as the working roll of the assembly. This roll is normally biased to upper position by a pair of counter weights l6 which slide vertically in recesses l1 formed in the housings II and I2 and which are connected to the chocks M by means of chains l8 entrained over sprockets l9.

Rotatably supported on the base I8 intermediate the housings II and I2 and parallel with respect to each other and to the working roll I5 is a pair of spaced cradle rolls 2!) the function of which is to rotatably support a coil of metal strip in the uncoiling structure. To assist in opening a coil and in threading the leading end thereof through pinch rolls (3|, for example) or other equipment with which the uncoiler of the invention is associated, we provide for the driven rotation of the cradl rolls 2!) and for this purpose we may employ a motor 2| operating through a speed reducer 22 which has its output connected to the cradle rolls through suitable sprocket and chains 23. In accordance with usual practice, we may provide an over-running clutch, not shown, in the cradle roll drive to permit the cradle rolls to run freely in a forward direction when the strip is being pulled off the coil by th said pinch rolls, for example, as will be understood by those familiar with the art.

Each of the two housings I I and I2 have a plurality (preferably four) of spaced horizontally extending and bushed guiding bores 24 therein,

and slidably received in each of the bores 24 is a rod 25. Rigidly secured tothe inner ends of, the rods 25 is a pair of side guide plates 25, one of which is shown in plan in Figure 3. On: the inner face of each of the side guides 26 is assembled a round projection 21 and .by referring-to Figure 3 it will be noted thatthe'projec'tions 21 are located substantially above and equidistant from the two cradle rolls and substantially in the common plane of the two guiding slots I} in the housings II and I2. For moving the side u de l fil and out o contact a oil irregu ed, to center the coil with other apparatus, or to simply loosely confine the coil during the uncoiling operation each of the side guides 26; isconnected to a piston rod 28 of a fluid cylinder 29. The cylinders 29 aredouble-acting and it will be understood that during normal operation the side guides 26 can be made to move in andout as desired.

By referring to Figures 1 and 2 it will be noted that, there is associated with each of the chain sprockets IS a second parallel sprocket I9 and in practice these pairs of sprockets are keyed to common shafts so that both rotate together. Sprockets I9 are connected by means of endless chains 40 to sprockets 39, which are keyed to. a synchronizing shaft 39 which isjournaled in the base structure III in spanning relation to the two housings II and I2. This construction insures that the two bearing chocks I4 will slide upwardly and downwardly in unison in the inclined slots I3-,to thereby maintain the, working roll I5 in parallel relation to the axes of the cradle rolls 2ll and other common axes of projections .21 in' all positions of the working roll.

In. the. normal use of .the uncoiler above described the same will be positioned in relation to the pinch rolls 3| or other pulling device in the user's plant in the manner shown in Figure 1 whereby. the strip will be pulled off the uncoiler in a generally horizontal direction which is normill to theaxis of the working'roll I5-and which is in the direction of slant of the slots I3. At the start of a cycle of operation the working roll I5 will be raised to its uppermost position and the side guides 26 will be retracted to allow the coil to be loaded from the front of the machine. The coil'is so oriented that the outer end of the strip stock terminates in a rearward direction and either manually or by means" of suitable equipment, not shown, the leading end portion of the strip is pulled off the coil and looped over the working roll I5 and threaded into pinch rolls 3Il As the'latter begin to 'apply'tension to the strip the strip will assume a tight curvature about the working roll- [5 andin doing sofwillincrease the tension required to be applied by the'rpinch rolls to continue the feeding ofthe strip. Asth'is tension builds up in a horizontal direction, as represented by vector A inFigure 4, the working roll I5 will be forced downwardly, as represented by vector B, due to the inclined directionof the guide slots I3 and theworking roll l5 will thereupon be held in tight pressure engagement with the outer periphery of the coil 30 being paid off. The apparatus thus operates to rigidly confine the metal strip transversely at the point of departure of the strip from the coil proper and to immediately thereafter subject the strip while under tension to cold working by flexure about the working roll. I5. This working of the strip relieves the coil sets or stresses inherent in the strip and thereby prevents the formation of coil breaks in the strip regardless of the manner in which the strip is subsequently handled. It is recognized that the propensity of strip material to coil break is influenced by the gauge of the stock, by the analysis and temper of the steel, prior working, etc., but in general it will be found that stifler rnaterial-is more prone to develop coil breaks. In the inherent operation of our apparatus stifier material requires a much larger pulling force for the uncoiling operation and this in turn results in the. working roll I5 applying a much heavier radial pressure to the periphery of the coil. Therefore, the apparatus of our invention will automatically apply sufficient working to the strip to avoid the formation of coil breaks regard+ less of variations in the gauge, temper or other specifications of the coil strip.

During uncoiling, the side guides 26 will be loosely applied to opposite sides of the coil to prevent the respective convolutions of the coil from telescoping due to the combination of the diametric compression exerted between the cradle rolls 20 and the working roll I5. If irregular action should develop, however, and the pinch rolls are stopped and opened or reversed the resulting collapse of the pull-out tension will, of course, automatically relieve this compression to thereby permit the side guides 25 to re-align the side edges of the convolutions of the coil.

The primary function of the projections 21 :is to maintain the coil in substantially proper-operating position during preparations for uncoiling and. during the uncoiling operation proper, particularly when the coil is down to a few convolutions when the bend of the stock about the work ing roll I5 tends to kick these few remaining convolutions out the back of the uncoiler.

In Figures 5-9 of the drawing we have shown a modified form of our invention wherein are incorporated certain additional novel features which facilitate the loadingand threading of the uncoiling apparatus and of processing apparatus which may be associated therewith. As shown in Figures 5 and 6, housings I I and I2 have been provided with relatively wide guide slots I3. Slidably mounted in the slots I3 for vertically inclined movement are bearing chocks I4" which are, of course, counterweighted and interconnected for synchronized movement in the manner explained in describing the embodiment'shown in Figures 1-4. Mounted in the lower end pQ ftions of the checks I4-' for rotatable movement therein are carrier blocks III and 42. Each of the carrier blocks AI and 42 journals one end of a pair of cooperatingpinchrolls 43 and 44. In theillustrated embodiment suitable gears 4-5 and 45am associated with the pinch rolls 43 and i4 and operate to insure synchronous motion of the rolls at all times.

As may be observed in Figures 5 and 8 the carrier blocks and 42 are mounted in eccentric relation to the shaft sections. thereof 41 and 48 which are journaled in chocks I4. It will further be noted that the lower pinch roll '44 is axially aligned with theshaft sections 41 and 48. This arrangement provides that shaft 49, which is connected to and operates to drive the pinch roll 44, may extend directly through the shaft section 4'! to an external driving connection. The upper roll 43 is of course driven by the lower roll 44 through gears 45 and 46.

While it will be understood that various wellknown types of driving means may be used to operate the pinch roll 44, we have shown for purposes of illustration a conventional gearhead motor Ell which is mounted in depending relation to a bracket 5|; the bracket in turn being rigidly secured to the chock l4 at the left hand side of the apparatus. Connecting the motor 5s and the shaft 49 is a conventional overrunning clutch 5| which of course permits the pinch rolls 4% and 44 to overrun the driving means as the strip material is payed oil by power means external of the uncoiler, as for example, by the drive rolls of a conventional roller leveller or other processing machine, not shown.

As shown in Figure 4, a coil is positioned in the uncoiling apparatus in such manner that the strip pays off the periphery of the coil in a direction away from the rolls 3| of an associated processing machine. Thus it is necessary to bend the material reversely about the working roll l5 in order to thread it into the rolls 3|. Considerable effort may be required for this operation, particularly when working with heavy gage material.

In the embodiment shown in Figures 5-9 we have provided a simple yet efiective power driven means for obtaining the required reverse bend in the material. As shown in Figure 9 we may, by rotatin the carrier blocks 4| and 42 through an angle of 180, position the normally upper roll 43 below the roll 44. Thus a strip end 52 may be inserted directly between the rol'ls 43 and 44 in a direction away from an associated processing machine, not shown. The strip end having been thus inserted, as indicated by the broken lines of Figure 9, the carrier blocks and 42 may be pivoted upwardly to return the roll 43 to its normal position. It may be observed that in this operation the strip 52 will be bent reversely about the lower roll 44, which roll thereafter functions as the working roll l5 described in the embodiment of Figures 1-4.

To rotate the carrier blocks 4| and 42 in the manner above described we have mounted a pinion 53 at the outer ends of th shaft sections ll and 43. Operatively associated with each of the pinions 53 is a rack 54 which is carried by the piston member 55 of a conventional fiuid (preferably air) cylinder 56. Preferably the cylinders 56 should be designed so that when the piston member 55 is fully retracted the carriers 4| and 42 will be vertically disposed, with the roll 43 above the roll 44, and when the piston 55 is fully extended the carriers will be vertically disposed with the roll 43 in the lower position as shown by the broken lines of Figure 9.

To insure synchronous rotational motion of the carriers 4| and 42 we have provided channel members 5i and 58 which are rigidly secured to and extend between the carriers. As shown in Figure 5 the channels 5'! and 58 are positioned on each side of the line of contact between the rolls 43 and 44. This is necessary, of course, to permit the material to pass freely through the rolls.

In a normal loading and threading operation using the apparatus above described, a coil, not

shown, is positioned on the cradle rolls 20 in the usual manner. With the pistons 55 fully extended, placing the roll 43 in the lower position, the leading end 52 of the coiled material may be inserted directly into the pinch rolls 43 and 44. The motor 50 may then be energized to drive the rolls and draw the material therethrough. As soon as a sufiicient length of strip has passed through the rolls the pistons 55 may be'retracted to rotate the carriers 4! and 42 upwardly, bending the strip about the normally lower roll 44 and directing it toward an associated processing machine, not shown. The motor 5%, of course, continues in operation until the material is threaded into the drive rolls, not shown, of the processing machine, whereupon the material will be rapidly payed off from external power means.

It will be understood that the theory of operation (i. e., the utilization of the force required to pay off the material to exert a confining force on the periphery of the coil) is similar in all respects to that of the embodiment shown in Figures 1-4; it being noted that subsequent to th threading operation the lower roll 44 of the latter embodiment becomes a working roll and performs the same function as the working roll of the former embodiment.

It should now be apparent that we have provided improved apparatus which accomplishes the objects initially set out above. The apparatus is'entirely automatic and foolproof in operation, is simple in design, and may be economically produced. Its practical importance lies in the fact that it provides operative apparatus for furnishing breakfree strip in many smaller fabricating and processing plants which do not require large tonnage capacity and/or further working of the strip as is performed by the expensive and more complicated processing uncoilers, strip processers, and roller levellers.

In the two embodiments described herein we provide the small manufacturer who requires only relatively light gage material with apparatus which may be installed and operated at minimum cost, and further provide, at but slightly greater cost, apparatus which is suited for the manufacturer who must use heavier gage material. 1

Having thus described our invention what we claim is novel and desire to secure by Letters Patent is:

1. A metal strip uncoiler for use with stock pulling means comprising a base, a pair of horizontally spaced and upwardly extending housings mounted on said base, a pair of spaced parallel coil-supporting cradle rolls j ournaled on said base between said housings, each of said housings having a plurality of spaced guiding bores therein disposed parallel with the axes of rotation of said rolls, guide rods slidably'received in said bores, a pair of side guides rigidly secured to the inner ends of said rods and adapted to engage opposite sides of a coil of strip supported on said rolls, means on said base to move said side guides toward and away from each other, an annular projection on the inner face of each side guide positioned above and substantially equidistant from said rolls and adapted to enter into the center opening of a coil of strip supported on said rolls, each of said housings having a guiding slot extending substantially radially outward of said projections and in normal installations upwardly inclined away from the stock pulling means, a bearing chock slidably received in each of said i ned ve s id cradle rollsand m unted o S ho g m vement toward and awa from a o e an annu ar p oje tion on the inner face of each side guidepositionedaboveand su ta tial y e u dista t rfrom sa d ol s a adapted to. enter in o th center ope in 01.1

o of s r pz upportedro sai ro s,.eaeh of said u n ha ne asuidineslot xten in ;s b tant al y radially outward ofrsaid pr j ct ons and i normal installation upwardly inclined away f om t to k pu li s'mean a h aring chock a ly re e ved-.i .ea .h of said sla aa working ;roll having its end portionsjournaled in said shocks. eac ofsai h u insshaving a v r ic y .dispos d .reQ esfor the .Slidable re ept o of a cminte wei t,;;a=.co i ter wei ht di po ed i eac ,of said recesses,,a sheave at the upper end ,of each of saidhousings, and a ,fiexible connection .between the chockandthe counter weight on each of aid housings, said jconn c on be n entrained over said sheaves, the arrangement ein su h .thattupon t str p of a coil whic is pp rted on said cradl 0.11s bei pped around said working-roll and;pulled. outwardly by said stock pulling means said working roll will be f ed downw rdl in p p essu cont wi h p r ph a .suria e-p said c l.

3 A m talstrip un oi e or usewit st k pu i ea s compr sin a. a of hor ontal p dand pward y ex e d nei us ns a pa f spa ed paral el c ad e ro ls p sit ne rb t e the l a po on i f s id h usi i scanning relation thereto, mandrel means ,mounted for horizontal movement along the axis positioned above and substantially equidistant from said cradle-rolls;anda apted toenier the ent op n ng Of a .coi ofstr p sup o dvon a d'..r.o .ls each of said housings having a guiding ;slot;e xtending substantially outward of saidaxis and in normal installations upwardly inclined away from the stock pullingmeans, a-bearing chock slidably received in each of saidslotaand @1WQYk" ing roll having :its end-portions journaledin said chocks, the arrangement-being such that-upon the strip of acoil supported on saidcradle rolls or on said'mandrel means being lwrappedaround said working roll and pulled outwardly by said stock pulling means said working roll will be forced downwardly into pressure contactwith the peripheral surface'of said coil.

4- ppa atus a cor in t claim .3 furthe including a sheaveat the upper end of eachl of said slots, at counterweight-on eachof said-housings and guided for'vertical movement with respect ,thereto, and a flexible connector on each of said housings. entrained over the-sheave thereon and interconnecting the counter weightand chockthere n- 5. DDa-ratus..fQ .zuncoiling ..-m ,,strip 1 and adapted to. paused-with o inul i e-me -n ,c mrising means to .ro atab y supp rt a coil of strip i rotati n a out a ene a ly d xi di pos d h riz nt y a orkin roll d s e .su stantially parallel with said axis, and means mounting said working roll for sliding movement in a direction normal to the axis thereof and upwardly inclined away from said stock pulling .means, the arrangement being such that upon the strip of coil which is supported on said-coilsupporting means being wrapped around said working roll and pulled outwardly by said stock pulling means said working roll will be forced .downwardly into pressure contact with the peripheral surface of said coil.

-6. Apparatusaccording to claim 5 further including means to yieldably biassaid working roll to upper position, and means to maintain the axis of said working roll parallel to said first mentioned axis in any position of said working roll.

7. A metal strip uncoiler for use with stock pulling means comprising means to rotatably supporta coil of strip for rotation about a generally fixed axis extending horizontally, a pair of housings extending upwardly from sides of a coil of strip when so supported and each having a guiding slot extendingsubstantially radially outward of said axis and upwardly inclined away from saidstockpulling means, a bearing chock slidably received in each of said slots, a working roll having its end portions journaled in said chocks, a shaft rotatably mounted on the upper end of each of said housings and each having keyed thereto a pair of spacedparallel sprockets, acounter weight on each of said housings and guided for vertical movement with respect thereto, .a chain interconnecting the chock and the counter weight on each .of said housings and entrained over the one of said pair of sprockets on each of said housings, a synchronizing shaft spanningsaid housings'and having keyed thereto a pair of widely spaced'sprockets, and a pair of endless chains interconnecting the others of said pairs of sprockets on said first mentioned shafts and the said sprockets on said synchronizing shafts.

-8. A metal strip uncoiler for use with stock pulling means comprising means to rotatably supporta coil of strip for rotation about a generally fixed axis extending horizontally, a pair of side housings extending above said coil, each of said housings ,havingia guiding slot upwardly inclined away from said stock pulling means, a bearing chockslidably mounted in each of said slots,-a working rollhaving its end portions journaled in said chocks, means interconnecting said checks to synchronize the sliding movement thereof whereby said working roll is held in parallel relation to said axis in any position of said working roll, the arrangement being such that upon the strip of acoil which is mounted on said coil-supporting means being wrapped around said working roll and pulled outwardly by said stock pulling means said working roll will be forced downwardly into pressure contact with the peripheral surface of said coil.

,9. Apparatus accordingto claim 8 further including means to yieldably maintainsaid working roll in upper position whereby upon completion of the paying off of the strip of one coil the workmg r011 will automatically raise to permit the loadingof a next succeedingcoil onto said coilsupporting means.

10 A metal strip uncoiled for use with stock Pul in a s c mprisin means to rotatably support coilv st p ma erial. a pair ofrside housings extending above said coil, each of said housings having a guiding slot upwardly inclined away from said stock pulling means, a bearing chock slidably mounted in each of said slots, a rotatably mounted working roll supported by said chocks, means interconnecting said chocks to synchronize the sliding movement thereof whereby said working roll is held in parallel relation to said axis in any position of said working roll, the arrangement being such that upon the strip of a coil which is mounted on said coil-supporting mean being Wrapped around said working roll and pulled outwardly by said stock pulling means said working roll will be forced downwardly into pressure contact with the peripheral surface of said coil.

11. Apparatus according to claim 10 further characterized by a carrier block rotatably mounted in each of said chocks, a pair of pinch rolls rotatably journaled by said carrier blocks, means mounted on at least one of said chocks and operatively associated with at least one of said carrier blocks adapted to rotate said blocks about a horizontal axis extending through both of said blocks, and drive means mounted on at least one of said chocks and operatively associated with at least one of said rolls adapted to rotate said rolls, the arrangement being such that strip material from a coil supported on said coil-supporting means may be inserted into said pinch rolls and drawn therethrough upon energization of said drive means and that upon energization of said means to rotate said blocks, said blocks will be caused to rotate whereby said strip is wrapped about one of said rolls, said last men- 1 tioned roll thereafter becoming a working roll.

12. Apparatus according to claim 11 further characterized by said drive means being operatively associated with said rolls through an overrunning clutch, said clutch being adapted to disengage said drive means when said pinch rolls are caused to rotate at a higher speed than that caused by said drive means.

13. Apparatus according to claim 11 further characterized by said carrier blocks being mounted for rotary movement about an axis through one of said pinch rolls, said drive means being connected to the last mentioned of said pinch rolls, and means interconnecting said pinch rolls whereby said rolls are caused to have equal surface velocities at the line of contact therebetween.

14. Apparatus according to claim 11 further characterized by said means to rotate said blocks including a fluid cylinder associated with one of said blocks, said cylinder being operative upon actuation thereof throughout a complete stroke to rotate said block through an angle of substantially 180.

15. In uncoiling apparatus for use with stock pulling means and of the type wherein strip material being uncoiled is bent reversely about a working roll and wherein the coiled material is confined at the point of departure of the material 10 from the coil by means of pressure cont-act between said working roll and the coil; the combination of means to rotatably support a coil, a pair of pinch rolls, carrier blocks rotatably journaling said pinch rolls in paralle1 relation to the axis of said coil, mounting means for said carrier blocks adapted to permit rotational movement of said blocks about an axis parallel to said pinch rolls and to permit movement oi said last mentioned axis toward and away from said coil substantially along a path radiating from the axis of said coil at an angle inclined away from said stock pulling means, and means to rotate said carrier blocks whereby one of said rolls may be moved from a position above the other of said rolls to a position below the other of said rolls, the arrangement being such that strip material may be threaded between said pinch rolls in the direction of inclination of said path and said carrier blocks may be rotated to wrap said strip about the lower of said rolls in a reverse bend, whereby upon said strip being thereafter pulled by said stock pulling means outward of said rolls said strip will exert a force on said lower roll, a component of which force will be directed generally along said path whereby said last mentioned roll is urged into pressure contact with said coil.

16. In uncoiling apparatus for use with stock pulling means and of the type wherein strip material being uncoiled is bent reversely about a working roll and wherein the coiled material is confined at the point of departure of the material from the coil by means of pressure contact between said working roll and the coil; the combination of means to rotatably support a coil, mounting means rotatably mounting said roll in parallel relation to the axis of said coil, said mounting means being adapted to permit movement of said roll toward and away from said coil substantially along a path radiating from the axis of said coil at an angle inclined away from said stock pulling means, the arrangement being such that when strip material from said coil is bent around said roll in a reverse bend and is drawn by said stock pulling means outward of said roll in a direction away from the direction of inclination of said plane said strip will exert a force on said roll, a component of which force will be directed generally along said path whereby said roll is urged into pressure contact with said roll.

HARVEY D. MILLER. JOHN C. HOLDGATE.

References Cited in the file of this patent UNITED STATES PATENTS Number

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