US2001113A - Machine for handling strip material - Google Patents

Description

May 14, 1935.

G. SCHAEFER, JR

MACHINE FOR HANDLING STRIP MATERIAL .3 Sheets-Sheet 1 Filed Deo. 19, 1955 ATTORN EY May 14, 1935. G. SCHAEFER, JR

MACHINE FOR HANDLING STRIP MATERIAL vFiled Dec. 19, 1933 s sheets-sheet 2' INVENTOR ge cae ATTORNEY May 14, 1935 G. scHAEFER, JR

MACHINE vFOR HANDLING STRIP MATERIAL Filed D90. 19, 1953 3 Sheets-Sheet 5 ATTORNEY Patented May 14, 1935 UNITED STATES PATENT oFFicE MACHINE FOR HANDLINGi STRIP MATERIAL George Schaefer, Jr., Flushing, N. Y., assigner to Sanitary Public Service Corporation, New

York, N.. Y., a corporation of Delaware Application December 19, 1933, Serial No. 703,101

l22 Claims." (Cl. 242,58)

The present invention relates to machines for handling strip material, and is` more especially directed toward web handling mechanism wherein the web of anactive web roll is automatically reagplaced by the web of a reserve web roll upon depletion of the active .web rollto a predeterminedVV to insure against complete'exhaustion of supply it was necessary to make the replacement before the active roll was completely exhausted. VThis required close attention and frequent servicing,

`,and at best it could result only in wastage of vmaterial or complete exhaustionof the material "roll to a predetermined extent the web of the' reserve roll is automatically threaded into the machine so that the articles are then made from the paper or material of the reserve roll. 35, According to the present invention the feeding "in of the reserve web is accomplishedmechanically, reliance being placed on a friction seizure rather than the use of adhesives, common in web replenishing mechanism of printing presses, paper bag machinery, and the like. A According to the present invention the active web is threaded through the machine in the customary manner and in the normal operation o1 the machine its depletion takes place withoutY in any way `aiiecting the reserve web. The end of "the reserve web is removably secured to a de` vice which ,holds it stationary, adjacent the active Web and a roller about which the active web is passed. p This member is held in this position f so long. as there is suflicient material on the active roll. But, as soon as the material on the active roll is depleted beyond the predetermined amount, then the` member carrying the end of the reserve web is released and automatically carried in between the active web and the cooperating roller,

manual operation notautomatic in nature, and

so that the friction between the parts withdraws the reserve web and threads it through the machine so that two webs are passing through it until the active web is completely exhausted.

According to the present invention the structure is so designed that the roll which has been transferred from being in reserve to being active may be manually shifted to the position occupied by the former active roll, without making it necessary to interfere with the threading ofthe web through the machine. A new reserve roll may then be inserted in place and prepared for automaticy substitution. f

A further object of the present invention is to provide a mechanism wherein the manual threading of the material through the machine need not be repeated so long as a reserve roll has been kept ready for insertion automatically.

The present invention has been designed particularly for use in connection with vending and dispensing machines for paper towels and toilet seat covers and will be described in connection with such machines. However, it is capable of general application in web handling machines wherein anew web should be substituted upon the exhaustion of the one already in the machine.

Other and further objects will appear as the description proceeds. Y

The accompanying drawings show, for purposes of illustrating the present invention, two of the Imany embodiments in which the invention may take form, it being understood that the drawings are illustrative of the invention rather than limiting the same. In these drawings: Fig. 1 is a fro-nt elevational View of one form of va seat cover and towel forming machine supplied with the web replenishing mechanism, the cover of the enclosing casing being open and parts being broken away to show interior construction;

Fig. 2 is a sectional ViewV on the line 2 2 of Fig. 1, the casing being closed, showing the right frame and parts carried thereby in elevation;

Fig. 3 is a sectional view taken on the line 3-3 of Fig. 1;.the full lines indicating the parts in the normal or reserve position, the dot and dash lines indicating theI parts in position after the exhaustion of the active web and the drawing in ofthe reserve web; Y

Fig. 4 is an enlarged sectional view of a fra`gment of Fig. 3, me fun lines indicating the position of the parts just before the reserve web is? drawn intoy the machine; and

Fig. 5l is' an elevational view of a modified form of construction, parts being broken away and parts in section.

In Figs. 1-4, inclusive, of the drawings, the machine is shown as mounted in an enclosing casing or housing. It has a fixed back wall l0, side walls il, 2, bottom wall |3, and a cover or front case i@ hingedly secured at |5 to the side walls i and i2.

The side frames of the machine are indicated at 30 and 2|. While these side frames may be made of castings, they are preferably made, as here shown, in the form of a sheet metal stamping having stiffening flanges as indicated at 20a and Zia. rThe rear edges of these side frames are bent laterally to provide mounting flanges indicated at 20h and 2 ib, which extend from the top to the bottom of the frame. The side frames are secured together by upper and lower cross members 22 and 23. These may also be formed of sheet metal and welded to the side frames 20 and 2|. A lower front tie rod is indicated at 24. The frame and case are secured together by screws 24 passing through slots 24". rIhe side frames 20 and 2| carry side plates 25 and 20, which are secured in place by screws indicated at 2?, Fig. 2.

A female roll is indicated at 20. It is provided with a series of grooves indicated at 23a, 28h,

23o, 23d, to cooperate with knives, carried byA a male roll to be described, for the purpose of forming the toilet seat cover or towel. female roll is mounted on a shaft indicated at 29 and is keyed to the inner end 30 of a crank indcated at 3|.

The crank 3| also drives two gears, indicated at 32 and 33. The gear 33 is in mesh with an idler gear 34 pivoted at 35 on the side plate 25. The idler gear 34 meshes with another idler gear 30 pivoted at 3l on the side plate 25. Backward turning is prevented by a pawl indicated at 30. The idler gear 36 meshes with a gear 38 pivoted on a shaft indicated at 39 and supported at the lower end of hangers 40 and 4|. The hangers Vare pivoted on studs Sila and 4|a. The shaft 39 carries a cutter drum indicated at 42 which is provided with knives indicated at 43 and 44 cooperable with the grooves in the female roll 28 for forming seat covers and/ or towels.

A stop lever 45 is pivoted at 4G to the side frame A spring 4T presses the shoulder 48 downwardly to enter behind a shoulder 49 carried b-y a disc 50 secured to the crank 3|.

A selector lever 5| is loosely pivoted about the `crank shaft and is biased to the position indicated 'in the drawings by a spring 5?.. The selector lever 5| has a notch 53 to receive the nose 54 of the stop lever G5 and irrespective of whether the selector lever 5| is raised or lowered, the nose of the stop lever 45 is lifted upwardly to carry the shoulder d8 above the edge of a cam plate 55 urged to the right by a spring 50. This cam plate is loosely carried on the crank shaft and is secured to the cam 50 by a screw 51 passing through a slot 58.

rIhe selector lever 5| is provided with a rearward extension 5S adapted to engage the front end of a latch lever 60 pivoted on a shaft 6| mounted in the side frames of the machine. A similar latch lever 62 is carried outside the left side frame. These two latch levers cooperate with lugs G3 and 6G carried by the . hanger arms 40 and 4|, and are held against these lugs by a spring indicated at 05. When the front end of the selector lever is lowered, the rear end is raised This brings the latch levers above the lugs so that springs, one of which is indicated at 6l, will pull the male cutter cylinder rearwardly. This separates the male and female rolls so that the cutter blades 44, designed for making the flap of the toilet seat cover, do not reach the grooves in the female cylinder.

Mechanism not shown herein but shown and described in detail in my application executed concurrently herewith, for Dual purpose seat cover and towel forming machines, Serial No. 703,100, filed December 19, 1933, is employed to restore the cutter drum and hangers to the position shown in the present drawings, so that the cut-off knife 43 may cooperate with the groove 28a in the female roll to sever the paper.

An active web roll is indicated at W. In the present type of machine it consists of a roll of paper toweling of sufficient width to form a seat cover and soft enough to be readily disposed of. This active roll W is wound about a core indicated at l0, and this core is mounted in core ends or roll holders 1| adapted to be received in bearing members l2, secured to the side frames 20 and 2 I. Arms 1S and 14 are pivoted to the frames as indicated and are provided with friction shoes 5 which are pressed against the paper roll ends by springs as indicated at 16.

The web w from the active roll W is passed about a guide roll 'l1 pivoted to the side plates 25 and 26 and thereby applied to the surface of the female roller 28 near the topy of this roller. The active web passes about this roller 28 and between the roller 28 and a number of toothed rubber rollers indicated at 18, Fig. 1. These rubber rollers are mounted on a shaft 19 driven by a gear, indicated at 80, which meshes with the gear 32 carried by the crank shaft. The toothed rubber rollers press against the female roller 28 and the two together act as drawing rollers to draw the web through the machine. The web w, after passing between the knives and the drawing rollers, is delivered downwardly as indicated in Fig. 2. Portions of the delivery mechanism are indicated at 8|. This mechanism forms the subject matter of my concurrently filed application for Paper delivery mechanism, Serial No. 703,099 filed December 19, 1933.

The structure above set forth is that which normally operates during the use of the machine, so long as the paper is taken from the active web.

Web replenishing mechanism The upper rear part of the side frames 20 and 2| carry a shaft indicated at |00. Transfer cams and |02 are pinned to this shaft and carried outside the side frames and a transfer cam operating arm |03 is adapted to bear on the active web roll W. The shaft |00 is biased in a clock-wise direction by a coiled spring |04 connected to an arm secured to the shaft |00.

It will thus be seen that the position of the transfer cams and |02 will depend upon the amount of paper remaining on the active roll W. The lower ends of these transfer cams are flanged outwardly as indicated at |06 and |01 and are arcuate about the center of the shaft |00, as indicated. The extent of the clockwise movement of the shaft |00 is limited by a stop member its formed out of the side frame.

Transfer levers ||lJ and are slotted, as indicated at H2, and received over the studs 40a and Illa, respectively. The rear ends of these transfer levers are bent laterally, as indicated at ||3 and H4, so as to engage with the-lower ends of the transfer cams |0| and Ill-2.

`The front ends H5. and H6 of the transfer arms are bent lateral-ly and secured to a tie bar by screws ||1. They also carry a shaft H8. The shaftY H8 carries a blade I t9 urged in- 1a clock-wise direction by coiled spring |20. i It i's held in the position indicated in full lines in Fig. 4 by engagement with a stop' indicated at The front ends of the transfer levers H0 and also carry a clamp plate |22 pivotally secured as indicated at |23. This plate is adapted to rest by gravity on the upper edge of the tie plate I |1, as indicated more clearly in Fig. 4.

The reserve web roll is indicated at R. It is' a roll identical with rol-l W and is supported bearing members indicated at IM, similar to the bearing members 12. Arms |225 are provided with friction shoes |26 and are pressed against the paper roll ends |21 by springsl |28 in the same way that the active web roll is held. The reserve web 1' is passed underneath the plate H9.

`It' is then carried forward above theftie plate ||1 and when the clanfrping` plate |22 isA turned to the dot and dash position of Fig. 2, is doubled backon itself, somewhat as shown in Fig. 4. The clamp plate |22 is then returned to the full line position of Figs. 2, 3, and 4 so that is bears on the doubly folded paper.

When the active web roll W is depleted suiiiciently, the' transfer cam operatingarm |83 is moved into the dotted line position ofi Fig. 3, whereupon the cams ||l |I and m2 are moved forward to clear the lateral extensions ||3 and H4 on the transfer arms HU and This allows the heavy mechanism carried on the front ends of these transfer arms to lower from the full line position to the dot and dash line position of Fig. 3. They are supported by engagement of the tiebar ||1 with the portion |29` of the sidefram-cs 20 and 2|'. When this happens the blade H9 passes between the upper surface of' the female roller 28 and the lower surface of the active webw, the blade H9 beingswung counter-clockwise to a slight extent against the ten-sion of the spring |28. `When the rollers are new turned to continue to draw the active web w intoY the machine, the friction between the reserve web 1' and the active web and drawing roller is sufficiently great to pull the paper out from under the clamp plate|22 (if it has not already been pulled freell, whereupon the reserve web 1' is carried on through the machine in the same way as the active webw. `The machine can then continueto be operated as long as desired, or until the reserve roll'is exhausted. Before this time,v however, the attendant should have serviced the machine.`

The indication of the fact that the active roll has been exhausted is given by the signal carrying member Hifi, secured to the rightI transfer arm and visible through an opening, not shown in the front of the case.

To pass the web roll from the upper set of bearings to the lower set of bearings, itlis merely necessary to Vopen the case, remove the core. of the spent roll, pull the roll R with roll ends out of the upper bearings, and bodily shift it down. into the lower bearings while the transfer arms: have been lifted.` This will shift the transfer cam shaft to the normal position so that the transfer arms will be supported in the elevated position ready for the insertion of the new' reserve` roll.

The first time that the machine is threaded, it is desirable to have the blade ||9v and associated such asl indicated in Fig. 2. This may readily be accomplished by lifting these parts upwardly and pulling them forward' against the tension of springs |3|. The slots |12 allow this forward movement so that the parts can be passed up about the upper ends of the arms 25, as indi cated by the row of' dots |32, Fig. 2. When the parts are thusv elevated, the rolll may be readily moved into the bearings and one can manually pass the paper down between the guide roll and the female rol-ler and work it into the machine.

Inthe arrangement shown in Fig. 5, the upper reary partof the right hand frame is shown at |5111, and the lower front, part of the left hand frame is shown at |5|. The rst drawing roller |53I may correspond with the female rol-ler 2B of Figs. 1 4, while the cooperative drawing roller is indicated at |54 and the delivery roller at |55-, These rollers are geared toegther in the usual manner and operated by a crank as previously described. The male roll and controls for it are omitted from this figure.

The active web roll W and reserve web roll R' are carried in suitable bearings in the frames B5B' bears on the roll W and approaches the roll axis as the paper is unwound.

An arm |158 is secured to a rock shaft |59 and has its free end in the path of the drag bar. The shaft |58 carries a cam arm i6! on the outside face ofthe frame i5@ and the arms |58 and IGI and shaft |59* are pulled counter-clockwise by acoiled spring |62, secured to the frame let and to a pin |63'. these; parts normally in the full line position shown. When the active roll is exhausted these parts are moved to the dot and dash line position.

Transfer levers |54 and |65 are pivoted at IE5 to the frames and are secured together by a tie bar ,T61 similar to the tie bar Il. The arms are held in the full line position by a lug H58 which engages the upper face of arm itl. The transfer arms carry a shaft |69 about which is pivotally mounted a paper inserting blade 18, and also a clamp plate |1| pivoted at i12?. The blade |10 is provided with a finger H3 which extends downwardly as indicated, and is pressed downwardly by a spring similar to the spring Re.

The. reserve web r' is secured about the blade |10' and under the clamp plate i'ii in the same manner as previously described. When the drag bar moves the bell cran-k |58`|li to the dot and dash line position, the arm |16! passes beyond the `lug |68 and allows the transfer arms todrop to the dot and dashline position shown. The blade presses the reserve web against the roller |53, from which position it will be drawn into the machine in the same` way as previously described. Asfhere shown this roller is provided with a pin lll` which engages the extension 13 of the blade and pushes the blade further to the right,` the arms dropping lower. The axis of the blade supporting shaft |59 is now at the point marked 56e parts out of the way or in an elevated position,

The pin acts as a stop to `hold and the paper forced into the narrow space between web w and roller |13. rFhe reserve web r is now used, the drag bar i keeping it taut.

The drag bars |51 and E15 and the transfer arms` Vthe scope of the claims, and I wish it to be understood that the particular forms shown are but two of the many forms. Various modications and changes being possible, I do not otherwise limit myself in any way with respect thereto.

What is claimed is:

l. In web handling mechanism, in combination, means for Ysupporting an active web roll and a reserve web roll, web drawing means including rollers between which the active web is passed to pull the active web off the active web roll, whereby said active web roll is depleted, means for applying the web to the rst of said rollers so that the web contacts with an extended surface of said roller, and means responsive to such depletion of the active web roll below a predetermined size for inserting the end of the reserve web between the active web and the roller to which it is applied, so that the reserve web is frictionally gripped therebetween and carried between the drawing means, said web inserting means including a movable support which releasably holds the free end of the reserve web in position for such insertion. Y

2. A web handling mechanism such as claimed in claim l, having means for holding the movable support in fixed position throughout the depletion of the active roll until said predetermined diameter is reached, whereupon the movable support is released.

3. A web handling mechanism such as claimed in claim 1, wherein the movable support includes a blade about the edge of which the end of the reserve web is folded, the blade being movable tangentially of the first roller when the web is being inserted.

4. A web handling mechanism such as claimed in claim 1, wherein the movable support includes a blade bodily movable tangentially of the first roller, about which the free end oi the reserve web is folded, and a pivot for the blade to permit its edge to move radially of said roller.

5. A web handling mechanism such as claimed in claim 1, wherein the means for holding the.

end of the reserve web on the movable support is in the form of a gravit37 operated clamping bar bodily movable with the support.

6. In web handling mechanism, in combination, means for supporting an active web roll and a reserve web roll, web drawing means including rollers between which the active web is passed to pull the active web off the active web roll, whereby said active web roll is depleted, means for applying the web to the first of said rollers so that the web contacts with an extended surface of said roller, and means responsive to such depletion of the active web roll below a predetermined size for inserting the end of the reserve web between the active web and the roller to which it is applied, said inserting mechanism including a gravity actuated member to which the end of the reserve web is detachably secured, and means to hold the gravity actuated member in elevated position until the active roll depletion is accomplished.

7. In web handling mechanism, in combination, means for supporting an active web roll and a reserve web roll, web drawing means including rollers between which the active web is passed to pull the active web off the active web roll, whereby said active web roll is depleted, means for applying the web to the rst of said rollers so that the web contacts with an extended surface of said roller, and means responsive to such depletion of the active web roll be- 2,oo1,113 i low a predetermined size for inserting the end of the reserve web between the active web and the roller to ,which it is applied, said inserting mechanism including a releasably supported member disposed parallel of the axis of the rst roller and held adjacent said roller during the depletion of the active web roll and released upon the depletion of the active web roll, the end of the reserve web being folded about the edge of said member and releasably secured thereto so as to move with the member when released.

8. In web handling mechanism, in combination, means for supporting an active web roll and a reserve web roll, web drawing means including rollers between which the active web is passed to pull the active web off the active web roll, whereby said active web roll is depleted, means for applying the web to the rst of said rollers so that the web contacts with an extended surface of said roller, and means responsive to such depletion of the active web roll below a predetermined size for inserting the end of the reserve web between the active web and the roller to which it is applied, said means including a follower bearing on the active web roll and movable as the web is removed, a lever engageable with the follower and held stationary until the depletion is accomplished, and a web inserting blade carried by the lever for holding the reserve web out of contact with the first roller until the lever is released.

9. In a web handling mechanism, in combinaroll whereby said active web roll is depleted.

means for applying the web to the first of said rollers, so that the web is in contact with an extended surface of the said roller, a follower positioned according to the diameter of the active web roll, a transfer arm held by the follower in a fixed position so long as the diameter of the active roll exceeds a predetermined size and released when that size is reached, a web inserting blade carried by the transfer arm between the active web and adjacent surface of said first roller and movable when the arm is released to bring its free edge toward the point of application of the active web to the first roller, and a clamp moving with the blade and adapted to releasably secure the reserve web about the blade so that the blade when released will push the reserve web against the active web and roller to be drawn away from the clamp and carried between the active web and roller.

10. Web handling mechanism such as claimed in claim 9, wherein the blade is pivoted on a longitudinal axis and under the control of a spring which, when the transfer arm is released, presses the edge of the blade toward said iirst roller.

11. In a web handling mechanism, in combination, side frames adapted to detachably support an active web roll and a reserve web roll, web drawing means including rollers revolvably supported by the side frames and through which the active web is passed, whereby said active web is depleted, a guide to apply the web to the first roller, a blade between the guide and the first roller and movable toward and away from the point of application of the web to said roller, and means to secure the end of the reserve web to the blade, means to hold the blade away from the first roller, and means acting to release the blade determined amount so thatV thewend ofthe reserve roll is insertedf in between-the active web Vandthe rstroller, y, i

12. In a web handling mechanism, in combination, side"frames,` adapted to detachably support an active web roll and a reserve w'eb roll,v web drawing means including rollers revolvably supported by the side frames below the reserve and active web rolls and through which the active web is passed, whereby said active web is depleted, a guide above the first roller to apply the web to the first roller, a blade between the guide and the first roller and movable toward and away from the point of application of the web to said roller, and means to secure the end of the reserve web to the blade, means to hold the blade away from the first roller, and means acting to release the blade upon depletion of the active roll beyond a predetermined amount so that it drops down under the influence of gravity and the end of the reserve roll is inserted in between the active web and the rst roller.

13. A web handling mechanism adapted to employ an active web roll and a reserve web roll and having web drawing means including rollers betweenwhich the active web is passed, a guide for applyingv material from the active web roll to the iirst roller, whereby the active web is in contact with said roller about an extended surface thereof, and means for inserting the reserve web between the first web and said roller comprising a blade having means for releasably holding the end of the reserve web thereto, means for holding the blade in'position so that the reserve web is out of contact with the first web and roller, and means for moving the blade into such position that the reserve web frictionally engages both the rst web and the roller, so that the reserve web is pulled off the blade and carried in between the first web and said roller.

14. A web handling mechanism adapted to employ an active web roll and a reserve web roll and having web drawing means including rollers between which the active web is passed, a guide for applying material from the active web roll to the first roller, whereby the active web is in contact with said roller about an extended surface thereof, and means for inserting the reserve web between the first web and said roller cornprising a blade having means for releasably holding the end of the reserve web thereto, means under the control of the active web roll for holding the blade in position so that the reserve web is out of contact with the first web and roller so long as the size of the active web roll exceeds a predetermined size, and means for moving the blade into such position that the reserve web frictionally engages both the first web and the roller so that the reserve web is pulled off the blade and carried in between the rst web and said roller. g

15. A web handling mechanism adapted to employ an active web roll and a reserve web roll and having web drawing means including rollers between which the active web is passed, a guide for applying material from the active web roll to the rst roller, whereby the active web is in contact with said roller about an extended surface thereof, and means for inserting the reserve web between the first web and said roller comprising a blade having a free edge about which the end of the reserve web is folded, a gravity operated clamp bar' under which the endofithe reserve lweb iisinserted, means for holding theblade 4in I position so that the reserve web is out of contact with the rst weband roller, and means formovingthe blade into such position that the reservey lweb `frictionallyengages;boththe first `web and the roller so that the reserve web is pulled off the blade and carried in between the first web and said roller.

16. In a web handling mechanism, a horizontal drawing roll, a second drawing' roll, a guide roll above the first drawing roll, means to revolvably support an active web roll, the active web being passed about the guide roll and first drawing roll and then between the two drawing rolls so that turning the drawing rolls withdraws the active web, a web inserting blade, normally stationary, pivotally supported arms for supporting the blade adjacent the guide roll, means for releasing the arms so that they swing downwardly and pass the edge of the blade between the iirst drawing roll and guide roll, whereby the end of aV reserve web detachably secured to the blade may be pushed in between the active web and rst drawing roll. Y

17. In a web handling mechanism, a rotatable roller, an adjacent guide roller spaced slightly from the rotatable roller for applying a web to the rotatable roller, and a web inserting blade normally held in fixed position adjacent both rollers and adapted to releasably carry a reserve web, and means to move the blade into the space between the two rollers whereby the reserve web is pushed between the rotatable roller and first web.

18. In a web replenishing mechanism, a roller about which an active web may be partially wrapped, a blade parallel with the roller, means to hold the blade out of contact with the roller or the active web, a clamp parallel with the blade and bodily movable therewith, the clamp being adapted to secure the end of a reserve web which has been carried about the free edge of the blade, and means to guide the blade upon its release to move the reserve web into contact with the active web and roller. Y

19. A web replenishing mechanism as claimed in claim 18, having a spring tensioned when the blade with the reserve web is brought against the roll.

20. In paper handling, the method of feeding a reserve web into a machine having drawing rolls between which an active web has previously been inserted, which consists in placing the end of the reserve web into frictional contact with. the active web and the drawing roll about which the active web first passes so that the reserve web is gripped therebetween and carried into the machine between the active web and said roll.

21. In paper handling, the method of feeding a reserve web into a machine having drawing rolls between which an active web has previously been inserted, which consists in first folding the reserve web along a transverse line near the end thereof to form a straight transverse edge of double thickness, and then applying pressure to the folded web from the inside of the fold so that the entire width of the folded web is brought into frictional contact with the active web and first drawing roll and the reserve web is pulled thereby in between said active web and roll.

22. In a web handling mechanism, a frame, bearings for supporting an active web roll in a horizontal position, a spring pressed shoe bearing on the web roll and movable inwardly as the roll is depleted, a cam member movable with the shoe, a pivotally supported transfer arm having its rear end bearing on the cam and held stationary thereby until the diameter of the active roll is 5 reduced to a predetermined size, whereupon the transfer arm is released, a blade carried by the front end of the transfer arm about which a; reserve web is adapted to be folded, and a gravity operated clamping member for engaging the end of the web after it is folded about the edge of the blade.

GEORGE SCHAEFER, JR.

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