US1716812A

US1716812A - Roll changer

Info

Publication number: US1716812A
Application number: US718430A
Authority: US
Inventors: Ball Harry Vincent
Original assignee: R Hoe and Co Inc
Current assignee: R Hoe and Co Inc
Priority date: 1924-06-07
Filing date: 1924-06-07
Publication date: 1929-06-11
Anticipated expiration: 1946-06-11

Description

H. V. BALL ROLL CHANGER June 1111, 192,

Filed June '7, 1924 w! 6 Sheets-Sheet l H. V. BALL ROLL CHANGER .rmm, 11929.

Filed June '7, 1924 6 Sheets-Sheet 2 \rlllrll r1 llll June-ll, 1929.

H. V. BALL ROLL CHANGER Filed June '7, 1924 6 Sheets-Sheet 3 1 2 NVENTOR.

#1 (J7 Q 7 1 7A.;

A'r'nr's.

June 11, 1929.

Filed June '7, 1924 6 Sheets-Sheet 4 Him mm.

June 11, 1929.

H. v. BALL ROLL CHANGER Filed June '7, 1924 6 Sheets-Sheet 2.113, mw u mw I INVENTOR l 1' III I- llll lllllllll H. V. BALL ROLL CHANGER June 11, 1929.

e Sheets-Sheet Filed June 7, 1924 A'r'r Ys INVENTOR Patented June 11, 1929.

UNITED STATES PATENT orries.

HARRY VINCENT BALL, 0F CONCORD, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO B. HOE AND CO. INC., OF NEW YORK, N. Y., A'CORPORATION OF NEW YORK.

ROLL CHANGER.

Application filed June 7, 1924. Serial No. 718,430.

This invention relates to certain improvements-in web roll handling and controlling mechanism, and is particularly applicable to feeding webs to printing machines, though it may be used in other relations. I

It is one object of the present invention to provide a roll handling and controlling mechanism for the heavy paper rolls used in printing machines in which the rolls may be readily and quickly placed and brought into position for feeding to the press, and in which a running web and spare roll may be so arranged that the Web from an expiring roll may be joined to the web of a spare roll very quickly so that the time required for such operation may be reduced as far as possible within practical limits.

It is a further object of the present invention to provide a roll handling and controlling mechanism in which an improved arrangement is provided for exerting tension or pressure on the roll surface, the arrangement of the pressure devices being such as to extend substantially the width of the web so as to produce a uniform tension or pressure across the rolls so that a web may be fed from a roll evenly where due to faulty winding of the roll the web is tighter at one end of the roll than at the other or inthe middle of the roll, so that the web is fed into the press under an even regular tension.

It is a further object of the invention to pro duce a roll handling and controlling mechanism which can be manipulated so that a web can be fed from the .roll, on either side of the roll, whereby a roll canbe put into the mechanism in either position and it is not necessary to reverse the roll end for end to obtain a correct feeding of the web.

A further object of the invention is to produce a construction for effecting these objects which is small, compact, easily installed and readily manipulated, and which is not apt to get out of order so that it can be used substantially continuously.

A further object of the invention is to provide an improved means for holding the roll in the roll handling and controlling mechanism which will permit of the quick securing of the new roll in position and the ready removal of the expired roll core.

I With these and other objects not specifical- 1y referred to, the invention consists in ce1'- tain novel parts, arrangements and combinations which Wlll be further descrlbed 1n connection with the accompanying drawings, and

Figure 3 is an end view showing a running roll at the left in running position and a spare roll at the right;

Figure 4 is an end view showing the position of the parts when the roll at the left is about to run out and the parts have been manipulated to bring the new roll to the right into pasting position;

Figure 5 illustrates the position of the parts when the roll at the right, which is shown in Fig. 2, is in running position and is about to expire, the roll to the left being moved to pasting position;

' Figure 6 is a side view, partly broken away and partly in section,- of the mechanism, the view being taken in the direction of'the arrow 6 of Fig. 5; I

Figure 7 is a detailed sectional View taken on the line 77 of Fig. 5;

Figure 8 is an end view of a modified form of the roll handling mechanism in which the roll to the left is shown as exhausted and the roll to the right in pasting and running position, with a new roll ready tobe loaded into the exhausted roll support;

- Figure 9 is'a similar view, showing the new .roll supplied to the left as raised into pasting mechanism shown in Fig. 11, showing the parts in roll locking position;

Figure 13 is a sectional view'of the roll clamp;

Figure 14 is an end view of the construction shown in Fig. 12, looking in the direction of the arrow;

Figure 15 is a plan View, partly broken away, of one of the clamping sections;

Figure 16 is a side view, partly in section, of oneof the clamping wedges;

.Figure 17 is an end view of Fig. 16; Figure 18 is aside view, partly in section, of the clamp at the other end of the clamping mechanism;

Figure 19 is an end view of Fig. 18'; Figure 20 is a face view of a locking plate, looking in the direction of arrow Z of Fig. 11

Figure 21 is an end view showing a modification of the tension devices which may be employed, and

Figures 22, 23 and 24 illustrate various forms of the tension devices shown in Fig. 21. Generally speaking, the improved roll handling and controlling mechanism will include a rotatable carrier having a support for a running roll and a spare roll, means being provided for rotating this carrier to bring the supports into correct position for loading, for running and for joining an expiring running web to a new roll. Supported so as to move with the carrier, are provided friction or tension devices in the form of aprons or belts, these friction devices being supported so asto hang over the roll and to extend substantially widthwise of the roll so as to apply friction or tension substantially throughout. the roll width. In the best constructions, furthermore, these friction or tension devices will be sectional so that the friction or tension may be supplied to different portions of the roll and thus compensate for irregularities in the roll surface due to improper winding of the roll. As these friction or tension devices are moved with the roll and are simply hung over the roll by ad- .justing the frame so as to vary the angle of the friction or tension devices relatively to the roll, almost any desired friction or tension may be brought to bear on the roll surface, and a very efficient feeding of the web is effected. Various'constructions may be employed for carrying out the object of the invention, but certain preferred forms are shown in the accompanying drawings and will be described in detail.

Referring now to these drawings in detail, and first to Figures 1 to 7, the parts are sup ported upon a pair of uprights or

frames

1, 2 arisin from a suitable base, which may be of any desired configuration. J ournaled in these uprights is a supporting shaft 3 which supportsthe various mechanism hereinafter 'referred to, this shaft being preferably journaled in a pair of

brackets

4, 5. This shaft carries the mechanism for supporting and manipulating the rolls. Though various mechanisms may be employed for this, in the particular construction illustrated, splined on the outer end of this shaft, beyond the .frames, is a toothed sector 6, this sector and the shaft being so arranged that the shaft and certain parts hereinafter referred to being secured to the frame 1, beforereferred movement of the sector is secured by meansof a worm 9 mounted on a shaft 10 journaled in a bracket 11 supported in the frame 1, before referred to. In the other end of this shaft 10 is a gear 12 which is in mesh with apinion 13 on the end 13 of the armature shaft of an electric motor 14 whichv is secured in a bracket 15 suitably secured to the side frame 1, these parts being, as shown (see Fig. 6) outside the frame. L

Mounted to move with the shaft 3, asfithe shaft is rocked or rotated through the connections described, is a support for a running roll and a support for a spare roll,-

these supports being so arranged that a running web may be quickly joined with the spare roll and the spare roll moved to a desired running position, the expired roll removed and a new roll loaded into the support, thus becoming a new spare roll. While various constructions may be provided for effecting this, in the particular construction shown, these roll supports are mounted in the outer extremities of oppositely extending

arms

32, 33 fast on the shaft and rotating therewith, the rolls being carried in an improved roll support, designated generally by the numeral 34 and more fully described hereinafter. j

In accordance with the invention, an improvide tension or friction device is employed which moves with the rolls as the rollsthe roll may be effected at any stage in the unwinding of the roll or with rolls of different sizes. While these friction means may be supported in various ways and by the various characters, in the preferred form and as shown, these friction devices will be in the form of belts,thcse belts being preferably weighted, but being hung so as to lie against the roll surface and to move with the roll as the roll support is adjusted. In the particular construction shown, referring first to the belt structures illustrated in Figs. 1 to 9 inclusive, the belts are provided one for each roll position, that is, for a spare roll and a running roll, and in the best constructions these belts are sectional and extend widthwise of the roll for substantially the roll width. Preferably also these belts are of about the width of a predetermined section. of the form, as for instance a page, the belts being slightly narrower so as not to everlap on each other. lFour belts, two of which are broken away (see Fig. 6) 26 are shown for one roll support and form belts 26 for the other support. These belts are made of any suitable material, as rubber or fabric which will give the required friction or tension to the surface of the roll. These belts may be mounted and supported in various ways,but will be mount; ed so as to 'move with the roll as the rolls are adjusted by the rocking movement of the sector. While this may be effected in various ways, as illustrated, there are-provided, on each side of the machine, a pair of

arms

16, 17, 16, 17, keyed on the shaft 3, before referred to, these arms being arranged, as shown, substantially at right angles to each other and outside of the

roll supporting arms

32, 33, before referred to. Near the outer extremity of each of these arms are provided recesses which form slideways 18, 19 in which are located journal boxes 20, 21 which may be spring seated and in which are mounted guide or tension rolls 22, 23. Also supported near the outer extremities of these arms but inside It will be seen that with the construction so far described practically any desired ten sion may be given the roll by suitable adjustment of the roll in the frame, as the roll can be swung so as to cause the belts to engage more or less of the surface of the roll as desired, as will be apparent from an inspection of the various'positions shown in Figs. 1 to 7.

In accordance with the invention, means are provided whereby the end of the web of a new roll may be quickly and readily pasted or joined to the web from an expiring roll. In making the paste with the machine constructed in accordance with the invention, the roll carrying frame is rotated so as to bring the new roll, which has had adhesive applied thereto, in close proximity to but not touching the running web. When the run ning web has reached the expiration point, the press is stopped and the running web is forced by hand against the pasting portion of .the new roll and the expiring web severed or broken with a stick or the like behind or in back of the pasted portion. After the paste is made the press is started up and the joined webs pass on into the printing machine. Means are, therefore, provided for temporarily holding a portion of the spare web, to which adhesive has been supplied, in such a position that it can be readily joined with the running web at the desired time. ticular construction shown, the

arms

16, 17 are provided with extensions 202, 203 in which are supported

flat bars

28, 29, these bars at suitable points having seated therein

adhesive pads

30, 31. These pads are provided with any suitable adhesive which will hold a surface of the end of a web. As shown in Fig. 5, for instance, the outer surface of this web end is provided with adhesive by which it may be joined to the expiring web. In the best constructions, after the paste is made, the joined webs will pass through a pair of rolls, indicated by the

numerals

204, 205, which will insure the pasting of the webs and guide the joined webs into the press. Under some circumstances, however, when desired, these pasting pads and bars may be omitted and the web pasted directly to the end of a new roll to which suitable adhesive has been applied.

In the par- In the construction so far'described, it will be observed that the normal running position of the rolls is the low position and the loading position of the new rolls the high position. As shown in Figs. 2 and 3, where this construction is employed, preferably so that the loading position will be reasonably accessible, a pit 206 is provided into which the running roll is lowered to its running position by the rotation of the sector. The rolls maybe loaded in any suitable way. As shown, there is provided a set of tracks 207 on which may run a loading truck 208. This loading truck is provided with tracks 208 on which runs a wheel truck 209. The truck 208 is run from any suitable storage place, carrying thereon the truck 209 on which the spare roll has been loaded, the truck 208 being run in close proximity to the mechanism, and the truck 209 then being moved to bring the roll into correct position for being loaded into the roll supports.

This loading construction may be employed under such circumstances where the space at the end of the p e s is cramped or Cal the press is not sufiiciently high to permit the rotation of the rolls above the press floor. Under certain circumstances it may be desirable to operate the rolls wholly above the press or loading floor, and a construction for effecting this is shown in the accompanying drawings in Figs. 8 and 9. Referring to these figures, the parts will be substantially constructed and operated as hereinbefore described, but the running and loading positions are reversed, that is, the normal running position of the roll is at the top, as shown in these figures, and the reloading position at the bottom. When this is done, however, the blanket supporting rods 24, are shown as supported in the

arms

16, 16 behind the guide rolls 20, instead of ahead of them as shown in Figs..1-to 5 inclusive. This, for the reason that the belts must ride on the top surface of the roll, as will be apparent from an inspection of the figures.

As before stated, it is desirable that the roll be rotated in either direction, that is, either clockwise or counter-clockwise, so that the roll may be unwound without necessitating its removal and reversal. It will be observed that where the roll is supported so as to unwind counter-clockwise the pasting is effected by simply sticking the end of a new web onto the adhesive pads 30, as indicated, for instance, at roll R of Fig. 5. If, however, the roll is 50' positioned that it will unwind clockwise, as, for instance, the upper roll R of Fig. 2, the end of the web is looped around under the bar so that the inner surface of the end of the web is in contact with the adhesive supports of the bar 28.

It will be further observed, that in the con- 1 struction shown in Fig. l to 5 inclusive the roll is unwound away from the fixed belt supports 25 and toward the weights at. the end of the belts. This run is preferred because there is no tendency to lift the belts away from the roll. Under some circumstance, however, it may be found necessary or desirable to rotate the roll so that the rotation of the roll is against the weight, as shown, for instance, in Figs. 8 and 9. This construction has been found to answer the purposes for which it has been designed. It will also be observed that the movement of the support is limited by the sector, so that this movement is in a limited arc, and the rolls are positioned so that the webs run on opposite sides of the axis ofthe support. Thus the mechanism is capable of use in press rooms in which the space above the changer mechanism is limited.

In the best constructions means will be pro-v vided for effecting a sidewise movement of.

the rolls to causethe web to pass int6 the 6) the shaft 3, before referred to, at the end opposite the segment 6 is tapped to receive the threaded end of a shaft 36 supported in a bracket 35 suitably secured to the frame 2, before referred to. This shaft 36 is provided with a thrust collar 37 and a worm wheel 38 which engages a worm 39 on the end of the armature shaft of a motor 40 supported from a bracket 41 also secured to the side frame 2.

It will be observed that by the rotation of the worm 39 the shaft 3 and its associated parts will be given a sidewise movement in the frames so as to correctly adjust the position of the web, the end ofthe screw bearing against the end of the screw receiving socket causing this sidewise movement.

In roll handling and controlling mechanisms constructed and operated in accordance with the invention, the new web roll is brought closely adjacent but not into contact with the web to make the paste, the press being stopped during the pasting operation and the expiring web being pressed by hand or otherwise in against the pasted end of the new web roll, as if the new roll were brought into contact with the running web it would simply pull away from the paste-d end of the new roll and no joinder of the webs would be effected. In the best constructions, therefore, means are provided whereby the rotation of the sector and the consequent movement of the new rollto a pasting position is automatically stopped before the new roll has moved farenough to come in contact with the running web. While various means may be effected for this purpose, in the particular construction illustrated (see particularly Fig. 3) there is secured to the side fra e 1, before referred to, a bracket 42 which supports a circuit breaker of any suitablecharacter, shown in the form of apush button 420. This push button controls the motor 14, before referred to, through a circuit indicated by the broken wires XY and is operated by the movement of the sector so that when the parts are in proper position for pasting, as illustrated, for instance, in Figs. 4 and 5, the circuit is broken and the movementof the sector stopped.

While, as before described, a sectional belt hanging over the roll and having its free end weighted is preferred for controlling the unwinding of the roll, under certain circumstances a shorter belt with the weights distributed so'as to lie on the roll surface may be employed, and such a construction is illustratedin Figs. 21 to 24; of the drawings.

Referring now to these drawings, various forms of weighted'belts are illustrated which may be used. In such constructions the belt maybe sectional, as heretofore described, or may be, as shown, substantially the width of the roll. Referring first to Fig. 22, a belt 210 is shown which is provided with eyelets 211 in which may be hung hooks 212 whi h carry v used web running from the roll R weights in the form of bags of shot 213, these bags being distributed in staggered relation widthwise of the belt. In Fig. 23 the bags are shown in the form of strips 214 extending widthwise of the belt, being divided by convenience into pockets, the sewing lines being indicated by the numeral 215. In Fig. 24 an apron\216, made up of weighted pockets arranged close together and separated only by sewing lines 217, is shown as secured to the belt. With this construction, particularly the construction shown in Figs. 22 and 23, the weight imparted by the belt to the roll may be conveniently varied on the roll to compensate for various irregularities in the roll winding.

With the construction so far shown and described, it will be seen that a very efficient roll handling and controlling mechanism has been provided and one in which the tension or braking action of the belt may be varied within almost any practical limits.

While the operation of'the device is believed clear from the foregoing, it may be briefly recapitulated as follows:

Referring first to Fig. 1, the roll at the left R is shown as exhausted; the expiring web from the roll R has been united with the web of theroll R the sector 6 has been given a partial rotation to bring the support for the roll R into position to receive a new roll, the In Fig. 2 the sector has been given a further rotation to position the roll R in running position and a new roll R has been shown as mounted in the position formerly held by the roll R In Fig. 3 the roll R is shown as lowered to the running position, a paste having been made to the web running from the 'roll R and a new roll R is shown as mounted in the right end support. In Fig. 4 the roll R has about expired and the sector has been rotated to bring the roll R into position in which to make the paste. It will be noticed that the limit switch has been operated so as to stop the movement of the parts. The paste is now made, the web from the expiring roll R broken, and the sector again rotated into the position shown in Fig. 1 so that another new roll can be supplied into the position occupied by the roll R The rolls may be supported in the roll supports in any suitable or desired manner, but in constructions embodying the invention in its best form there has been provided a novel chuck or roll support by which the roll can be mounted without the use of spindles or the like, and by which it may be readily moved and inserted in position in the supports.

While the specific construction for efiecting this may be somewhat varied, as illustrated, there is provided a chuck, hereinafter referred to generally by the-numeral 34. This member 34 is an operating member, being provided with a head 340 having holes 341 in which a suitable tool may be inserted for the ma- This operating member 34 has a into the pipe or core 344 of the roll, and at its inner end is threaded as indicated at 345. Upon this threaded end 345 there is a second wedge shaped collar 47 which is threaded to correspond to the threads 345, and this collar is also provided with grooves 48. Surrounding the shank 343 of the member 34 are a plurality of wedge sections 49, three such sections being shown, and each provided at each end with a groove into which are fitted expansible binding rings 50. The sections are also provided at their inner ends with a groove 51 into which the spring seated pin may pro ject, this acting to restrain the chuck from being entirely withdrawn from the head 342.

In the outer surface of one or more of the wedge sections 49 there is formed a slot 346 in which a flat spring 52 is secured near the front and rear ends of the sections. Furthermore, there are provided pins 53 which engage the

slots

46, 48 in the

wedge collars

45, 47, before referred to, and which act to permit the ex- .one which permits the quick removal and remounting of a roll.

While the invention has been shown and described in What is now believed to be its best form, it will be understood that the structure shown and described may be subject to wide variations in the form and arrangement of the parts and the means for operating them without departing from the invention as defined in the appended claims.

What I claim is:

1. In a web roll changer, the combination of a running web roll and a spare web roll, a shaft, a support on the shaft having provision for supporting the running roll and spareroll at points on opposite sides of the shaft axis,

means for rocking the shaft in either direction to move each roll support from loading posi- 2. In a web roll changer, the combination of a running web roll and a spare web roll, a support for the rolls capacitated to move from a loading position, to a pasting position, and to a running position, a friction belt or strap engaging the surface of the roll in running position, but exerting substantially no pressure against the roll in pasting position, means to which one end of the friction belt is fastened, the belt being free to move toward the roll at its other end, and means connected with the free end of the belt for maintaining the belt under tension tending to press it against the roll surface the belt following the roll in engagement with the roll surface as the roll decreases in size.

3. In a web roll changer, the combination of a running web roll and a spare web roll, a

support for the rolls capacitated to move from a loading position, to a pasting position, and to a running position, a friction belt or strap engaging the surface of the roll in run- .ning position, but exerting substantially no pressure against the roll in pasting position, and fixedly secured at one end at a point above the roll when in running position, the belt being free to move toward the roll at its other end, and means connected with the free end of the belt for maintaining the belt under a constant'tension tending to/ press it against the roll surface, the belt following the roll in engagementwith the roll surface as the roll decreases in size.

4. In a web roll changer, the combination of a running web roll and a spare web roll, a shaft, a support on the shaft havin provision for supporting the running r0 1 and spare roll at points on opposite sides of the shaft axis, means for rocking the shaft in either direction to move each roll support from a loading position to a running position, and a belt or strap for each roll engaging the surface of the respective rolls and supported at one end so as to extend between the {)OIIS so that the rolls may unwind. against the elts.

5. In a web roll changer, the combination of a running web roll nd a spare web roll, a support for the rolls, means for rocking the support to move the rolls from a loading position to a running position, a friction belt or the like engaging the surface of the running roll, means for securing one end of the belt to move with the support, the other end of the belt being free, and means acting on the free end of the belt to maintain it under a tension tending to press it against the surface of the running roll.

6. In a web roll changer, the combination of a running web roll and a spare web roll, a support for the rolls, means for rockingthe support to move the rolls from a loading position to a running position, a fr1ct1o n device engaging the surfacecf therunning roll, means for securing a part of the frlctlon device so as to move with the support, and means for maintaining said friction device under a tension tending to press it against the surface of the roll.

7. In a web roll changer, the combination of a running web roll and a spare Web roll, a support for the rollscapacitatedtomove from a loading position'toar'unning position, a friction device engaging the surfaces of both the running roll and the spare roll, and means for maintaining the friction device under a tension tending to press it against the rolls the device following the rolls in engagement with the roll surface as the rolls decrease in size.

8. In a Web roll changer, the combination of a running web roll, and a spare web roll, a support for the rolls capacitated to move from a loading position to a running position, friction belts or the like engaging the surfaces of both the running roll and.

the spare roll, and means to which one end of each belt is secured, the other ends of the belts being free and provided with means for maintaining a tension tending to press them against the rolls, the belts following the rolls in engagement with'the roll surfaces as the rolls decrease in size.

9. In a web roll changer, the combination of a running web roll and a spare web roll, a

support for the rolls, means for. moving the support to move the rolls from a loading position to a running position, a friction belt or the like engaging the surface of the running roll, the other end of the belt being free and the belt moving with the support, and a guide for the web as it runs from the roll, said guide moving with the support.

10. In a roll controlling mechanism, the

combination of a pair of arms for supporting a running roll and a spare roll, means for rotatin-g the arms, belts for each roll each belt being substantially the width of a predeterminedsection of the web to be printed, said belts moving with the arms. 1 4

' 11. In a roll controllingmechanism, the combination of apair of arms for supporting a running roll and a spare roll, means for rotating the arms, weighted belts for each roll each belt being substantially the width of a predetermined section of the web to be prlnted, said belt moving with the arms.

12. In a roll controlling mechanism, the combination of a pair of arms for supporting a running roll and a spare roll, means for rotating the arms, weighted belts for each roll, each belt being substantially the width of a predetermined section of the web to be printed, saidbelts moving with the arms, and guides for. the webs moving with the belts.

13. In a roll controlling mechanism, the combination of a shaft, arms extending on each side of the shaft for supporting a runing roll and a spare roll, means for rocking the shaft to bring a roll loaded into a support below the shaft to a running position above the shaft and Vice versa, and guides moving with the rolls for guiding a web in either running position, and both when the web is unwinding clockwise or counter-clockwise.

14. In a roll controlling mechanism, the combination of a pair of opposed arms pivotally mounted, a roll support in each arm,

means for rocking the arms on the pivot to bring a roll loaded-into a 'support below the pivot to a running position above the pivot and vice versa, and guides moving with the rolls for guiding a web in either running position, and both when the web is unwinding clockwise or counter-clockwise.

15. In a web roll changer, the combination of a support for supporting a running roll and a spare roll capacitated to move from a loading position to a running position, and web guides acting to guide a web from the rolls both when the web is unwinding clockwise or counter-clockwise.

16. In a roll controlling mechanism, the combination of a pair of roll supports pivotally mounted for supporting a running roll and a spare roll, means for rocking the supports on their pivots, and web guides acting to guide a web from the rolls both when the web is unwinding clockwise or counter clockwise.

17. In a roll controlling mechanism, the combination of a pair of roll supporting arms, a shaft on which the arms are mounted, means for rocking the shaft to bring a roll loaded on the arms below the shaft to a running position above the shaft and vice versa, gui es for guiding a web from a running roll in either position and both when the web is unwinding clockwise or counterwise, and blankets moving with the rolls and in frictional contact with the periphery thereof.

18. In a roll controlling mechanism, the combination of a pair ofroller supporting arms, a shaft on which the arms aremounted, means for rocking the shaft to bring a roll loaded in the arms below the shaft to a running position above the shaft and vice versa, guides for guiding a web from a running roll in either position and both when the web is unwinding clockwise or counter-clockwise, and weighted blankets moving with the rolls and loosely hung thereon.

19. In a roll controlling mechanism, the combinationof a shaft, a pair of arms provided with roll supports on the shaft, a second pair of arms on the shaft, blankets secured to said second arms and hanging over the rolls, guides mounted in said second arms for guiding a web, and means for rocking the shaft. I

20. In a roll controlling mechanism, the combination of a shaft, a pair of arms provided with roll supports on the shaft, a second pair of arms on the shaft, sectional blankets secured on the second arms to hang loosely over the rolls, means for rotating the shaft, and guides for guiding a web running from the rolls. 3

21. In a. roll controlling mechanism, the combination of a shaft, a pair of arms provided with roll supports on the shaft, a second pair of arms on the shaft, weighted blankets hung from said second arms to frictionally engage each roll surface, means for rotating the shaft, and guides for guiding a web running from either roll.

22. In a roll controlling mechanism, the combination of a shaft, a pair of arms provided with roll supports on the shaft, a second pair of arms on the shaft, adjustably weighted blankets hung from said second arms to frictionally engage each roll surface, means for rotating the shaft, and guides for guiding a web running from either roll.

23. In a web roll changer, the combination of a running web roll and a spare web roll, a support for the rolls capacitated to move from a loading position, to a pasting position, and to a running position, a friction belt or the like engaging the surface of the running roll in running position but exerting substantially no pressure against the roll in pasting po sition, said belt being stationary relatively to the rotary movement of the unwinding roll, securing means to which one end of the belt is fastened, the belt being free to move toward the roll at its other end, and means connected with the free end of the belt for holding the belt under a tension tending to press it against the roll surface, the belt following the roll in engagement with the roll surface as the roll decreases in size.

24. In a roll changing apparatus, the cmbination of a movable support for suppo ing a running web roll and a spare web roll, friction means engaging the surface of the running roll, and means for moving the support so that a web from the spare roll may be pasted to the running web, said friction devices being so arranged with respect to the spare roll that when the roll is in pasting position substantially no pressure is exerted against the roll, but on a further movement of the support the roll is brought into pressure relation with the frictiondevices.

25. In a roll changing apparatus, the combination of a rotatable support ,for supporting a running web roll and a spare web roll, a friction belt of strap engaging the surface of the running roll, and means for turning the support so that a web from the spare roll'may be pasted to the running web, said friction belt being so arranged with respect to the spare roll that when the roll is in pasting position substantially no pressure is exerted against the roll, but on a further turning movement of the support the roll is brought into pressure relation with the friction belt.

p 26. In a Web roll changer, the combination of a running Web roll and a spare Web roll, a pivotally mounted support for the rolls capaoitated to move the rolls from loading position to running position and having provision for loading and supporting the running Web roll and the spare Web roll at opposite sides of the pivot point of the support, and means for operating the support.

27. In web roll changer, the combination of a running web roll and a spare web roll, a shaft, a Web roll supporting arms supported by the shaft and capacitated to move the Web rolls from loading position torunning position, said arms being arranged to permit loading of and to position the running Web roll and spare Web roll at opposite sides of the shaft axis, and means for operating the shaft to move the rolls from loading position to running position.

28. In a web roll changer, a web roll support arranged to turn on an axis through a limited are and having arms extending on opposite sides of the axis and arranged to permit loading and to carry a running Web CERTIFICATE or oonnacrlon.

- Patent No. r. 116,812.

roll on either side and a spare web roll on the other side.

29. In a Web roll changer, a Web rol support arranged to turn on an axis thro gh a limited arc and having arms extending on' opposite sides of the axis and arranged to permit loading and to carry a running Web roll on either side and a spare web roll on the other side, and means for turning the support on its axis. to raise or lower the arms on either side to position them for loading a Web roll and for moving it from loading to running position.

30. In a Web roll changer, the combination Granted June 11, 1929, to

i HARRY VINCENT BALL.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 8, cla1m' 30,llne s 43 and 44, strike out the words "and arranged to permit loading of the rolls on opposite sides of the'axis" and insert same to follow after the word roll line 45 of same claimeand that the said Letters Patent should be read with p this correction therein that the same may. conform to the record of the case in the Patent Off ice.

' Signed and sealed this 13th day of August. A. n. 1929.

' (Seal) M. JrMoore, Acting Commissioner of Patents.