US2361265A - Rewinding machine - Google Patents

Description

Oct 19444 P. J. CHRISTMAN 2,361,255

REWINDING MACHINE Filed April 20. 1944 4 Skeeter-Sheet 1 J INVENTOR. -92;-

1944. P J. CHRISTMAN REWINDING MACHINE Filed April 20, 1944 4 Sheets-Sheet 2 IN VEIV1 TOR.

I an BY MW H 770E/VEV5.

Oct. 24, 1944. P, J. CHRISTMAN 3,361,265

nmwmnme MACHINE Filed April 20. 1944 4 Sheets-Sheet a INVENTOR.

Oct. 24, 1944. P. J. CHRISTMAN 2,361,265

REWINDING MACHINE Filed April 20, 1944 4 Sheets-Sheet 4 IN V EN TOR.

Patented Oct. 24, 1944 UNITED STATES PATENT OFFICE" nnwnvnme MACHINE Peter J. Christman, Green Bay, Wis., assignor to Paper Converting Machine Co. Inc., Green Bay, Wis., a corporation oi Wisconsin Application April 20, 1944, Serial No. 531,904

11 Claims.

a rewinding machine having novel means for effecting a transfer of the web from the wound rolls on one mandrel to the empty cores on a succeeding mandrel while the apparatus is operating at full speed.

A further object of the invention is to provide in a rewinding machine means for causing a breaking of the web between the wound rolls on one mandrel and the rolls which are just being started on a succeeding mandrel, said means being operable without using a knife or other cutting instrumentality.

A more specific object of the invention is to provide in an apparatus such as is described in my pending application, Serial No. 525,156 filed March 6, 1944, having mechanism arranged to deflect and form a. loop in a portion of the moving web which is intermediate one mandrel being wound and a next succeeding mandrel and having means for tucking the web into thenip between the cores on the succeeding mandrel and an engaging roller, mechanism for causing a. drag on the roll that is being wound sufficient to allow slack in the looped web portion so that when said slack is taken up by the'tucking means a desired brealr of the web on a line of perforations will result. Thus the necessity of using a knife to sever the web is eliminated.

While the above object may be accomplished by various mechanically equivalent means for creating the drag, it is preferred to utilize ajsuction for effecting the desired result. Accordingly a specific object of the present invention is to provide suction means or equivalent means in the transfer bar of the loop forming mechanism, said suction being operable to momentarily retard the movement of the web toward the rolls which have just been fully wound.

A further object of the invention is to provide a, device. as above described, wherein the means for causing the drag on the web is controlled in timed relationship'with other cooper- 'ating parts of the machine and wherein it is operable quickly at the proper moment in the cycle of operation.

Other objects .of the invention are to provide a rewinding machine which is strong and du-. rable, which is speedy in operation, which will accurately produce aroll of the desired size, and which is otherwise well adapted for the purposes described.

With the above and other objects in view the invention consists of the improved rewinding machine and all its parts and combinations as set forth in the claims and all equivalents thereof.

In the accompanying drawings illustrating one complete embodiment of the preferred form of the invention,

Fig.1 is an elevational view of one end of the machine, parts being broken away;

Fig. 2 is a top plan view thereof, part of the transfer bar being broken away and shown in section;

Fig. 3 is a fragmentary view showing the opposite end of the machine from Fig. 1 and taken approximately on the line 3-3 of Fig. 2;

Fig. 4 is a vertical sectional view taken approximately on the line 4- 1 of Fig. 2 and showing the position of the parts as the transfer bar is moved forwardto deflect the web;

Fig. 5 is a view similar to Fig. 4 showing the position of the transfer bar just before the web is transferred to the empty cores;

Fig. 6 is a similar view showing the position of the parts at the time of actual transfer and just after the suction has been applied and Just after the web has been broken due to movement of the tucker bar in taking up the slack, the connections with the suction valve and suction pump be ng also illustrated; and I Fig. '7 is a similar view showing the transfer bar moving back out of the path of the mandrel holder, the connections with the suction valve and suction pump beingalso illustrated.

Referring more particularly to the drawings the machine includes a suitable supporting frame having spaced side members it and ii. A main shaft i2 is suitably journaled in the machine and is driven from an outside source through the pulley it. The shaft it rigidly supports a bed roll it so that as the shaft is driven the bed roll rotates. Referring to Fig. 1 the bed roll shaft l2 carries a bed roll gear it which in turn drives gears it, ill, it and it. The gear it is rigidly mounted on a shaft 20 for a pull roll 21!.

The gear I1 is rigidly mounted on a shaft 22 for perforating of sheet material which passes between the bed roll and the perforating roll.

The gear 18 is rigidly mounted on a shaft 25 web to a predetermined number of widths.

which drives a slitter roll 26. The slitter roll is formed with suitably spaced circumferential knives 21 which cooperate with circumferential grooves in the bed roll to cause slitting of the The gear is is rigidly mounted on a shaft 28 which drives a second pull roll 29.

Also rigidly connected to the bed roll shaft I2 is a worm 30 which drives a worm wheel 3|. The worm wheel 3| is rigidly mounted on a. horizontal shaft 32 and the shaft 32 carries a bevel gear 33 rigidly on its outer end. The bevel gear in turn drives a bevel gear 34 mounted rigidly on a cam shaft 35 which extends through the frame. The shaft 35 also carries a rigidly mounted sprocket wheel 38 which is connected by a sprocket chain 31 with a sprocket wheel 38 mounted rigidly on a short shaft 39 near the top of the side member ID (see Fig. 1).

The short shaft 39 carries a rigidly mounted gear 40 and this gear is preferably formed with a toothless gap 4|. The gear 40 in turn cooperates, with an intermittent gear 42 rigidly mounted on a mandrel holder shaft 43. The intermittent gear 42 is formed with three toothless gaps 4 The shaft 43 carries spaced mandrel holding members 45 and 46 (see Fig. 2). Each of these members consists of three arms extending radially from a hub portion. The outer end of each arm forms a suitable bearing for a rotatable holder 41. Each of the rotatable holders 41 at one side of the machine is equipped with a drive pulley 48. Mandrels 49 are removably insertable, in any wellknown manner, between the mandrel holders 45 and 48 in such a manner that when the drive pulley 48 for a particular mandrel holder is rotated that the attached mandrel 49 will be likewise rotated. Each of the mandrels 49 is adapted to receive a'pluraiity of cardboard cores in such a manner as to cause rotation of the cores when they are in position on the mandrel.

Referring to Fig. 1, on the outer end of the bed roll shaft there is also mounted a friction drive pulley 5! which is connected by an endless belt 52 with a smaller pulley 53 at the top of the frame. The pulley 53 is mounted on a shaft 54 and said shaft carries on its inner end a pulley 55 (see Fig. 2). The pulley 55 drives an endless drive belt 56 which is also threaded around a belt tightener pulley 51 and an idler pulley 58. That portion of the length of the friction drive belt 56 which extends between the pulley 55 and the idler pulley 58 is always deflected, in the manner shown in .Fig. 1, by engagement of certain of the mandrel driving pulleys 48 therewith. Thus, movement of the endless drive belt 58 causes rotation of those mandrels whose drive pulleys are in engagement with the drive belt 58 at a particular time in the cycle of operation.

On the end of the cam shaft 35 opposite to the end which carries the bevel gear 34 is an internal cam 59 (see Figs. 2 and 3) having a cam groove 68. Mounted for oscillation on a stud 8| is an arm 82 formed with a gear segment 63 at its upper end. Connected to the arm 82 and extending toward the internal cam is a shorter arm 84 equipped with'a cam follower 85 which rides in the cam groove 80. The gear segment 83 cooperates with a gear 66 rigidly mounted on a transfer arm shaft 81.. The transfer arm shaft is tubular throughout the major portion of its length to provide a suction duct 81'. Referring now to Fig. 2 and Figs. 4 to 7 inclusive, the

transfer arm shaft 81 has rigidly mounted thereon, in spaced position, transfer arms 88. The free ends of these arms are connected by a transfer bar 89 which has the cross-sectional shape shown in Figs. 4 to 7. A tucker pivot shaft HI connects the transfer arms 88 and has its ends pivoted in said arms. The tucker pivot shaft has rigidly connected thereto, in spaced position, a plurality of tucker arms H and these tucker arms are connected at their free ends by a tucker bar 12. The tucker bar 12 is normally maintained in an inactive position against a stop 13 by means of a coil spring 14. The tucker arm shaft 10 is equipped with a projecting actuating lug 15. This lug is adapted to be engaged by one of the fixed studs 18 projecting from each mandrel holder arm, and this engagement causes movement of the tucker arms II and tucker bar 12 to the position of Fig. 6 when the transfer bar is in the position of said figure.

It is a novel feature of the present invention to provide suitable means for causing a drag on the portion of the web which is between the top mandrel (Fig. 6) and the next succeeding mandrel. This retards the roll being wound on the top mandrel sumciently to allow slack in the looped web portion of Fig. 6 so that when the tucker bar 1.2 is moved to the position of Fig. 6 it will take up this slack and at the same time cause the web to break on a, line of perforations as at 11. These perforations are at regular intervals in the web and have previously been made by the perforating teeth 24 of the roll 23. The timing must be such that a row of perforations is located at the point 11 of Fig. 6 when the tucker bar 12 is actuated.

As one method of creating the desired drag the transfer bar 69 is formed with a longitudinal suction duct 18 which extends near each transfer arm 68. Suction ports 18 extend transversely at intervals from the duct 18 to the face of the transfer bar. The ends of the duct 18 communicate with ducts 88 near the transfer arms and the latter are connected by flexible tubes 8| with the tubular interior duct 61 of the transfer arm shaft 61. One end of the duct 81' is in turn connected by a flexible suction conduit 82 with a valve 83. The valve 83 (see Figs. 2 and 6) comprises an inner member 84 keyed to the cam shaft 35, and a fixed outer member 85 which is secured to the frame side member H. The outer member has a port 86 to which the conduit 82 is connected, and has another port 81, at about 90 from the port 86 which is connected by a conduit 88 with a suction pump 88. The inner valve member has a duct 84 therein which connects the pump with the suction line 82 only when the valve is in the position of Fig. 6. This suction is timed by the valve 83 to not just before and while the tucker bar 12 moves to the position of Fig. 6. The suction has enough strength to retard the winding of the top roll of Fig. 6 so as to allow slack to be engaged by the tucker bar. When the slack is taken up, however, the tucker bar exerts a pull on the web, but as the web is temporarily bound to the transfer bar by the suction at the ports 18, the web will be broken on a line of perforations as at I2. The arrangement and timing are such that a line of perforations, made by the teeth 24, are at a proper location when the tucker bar and suction are acting.

Operation When the bed roll shaft 12 is driven it will simultaneously cause driving of the pull rolls l8 9,801,265 and n and of the perforating roll "and slitter roll l3. The bevel gears 33 and 34 will cause driving of the cam shaft 3-! and through the sprocket wheels 38 and 40 driving of the intermittent gear 42 for the mandrel holder. In addition the'endless belt connection 52 with the top pulley 53 will cause driving of the friction drive belt SI.

A web of toilet tissue, paper toweling or other sheet material, which is fed from a jumbo roll 80, passes over the top of the pull roll l6 and then downwardly around the bed roll I! between the latter and the rolls l1, l8 and IS. The web then extends upwardly around the bed roll and beneath one of the mandrels to the uppermost mandrel whose cores 50 are being wound. As the internal cam 58 rotates, it will, through the action of the cam follower 65 and arms 84 and 82, gear segment 63 and gear 66. cause rocking of the transfer arm shaft to cause movement of the transfer arms in the direction indicated by the arrow in Fig. 4. This causes deflection of that portion of the web which is between the mandrel being wound and the next succeeding mandrel- The rolls of paper on the uppermost mandrel of Fig. 4 are nearly wound. Through the action of the cam 58 the transfer bar 69 continues its movement from the position of Fig. 4 to the positionof Fig. 5, making a loop 9| in the web and wrapping it nearly around the empty cores on the mandrel which is adjacent the bed roll. All of this time the drive Pulleys 4B for the mandrel which is being wound and for the next succeeding mandrel are in engagement with the drive belt 55. as shown in Fig. 1, and the mandrels and cores thereon are being rotated. The third mandrel is not being rotated and is in the position shown in Fig. 1 where the mandrel may be disconnected, the wound rolls removed and a new set of cardboard cores 50 inserted. Following the position oi Fig. the cam follower 65 (see Fig. 3) drops into a quick cam drop portion 92 of the cam groove to cause a quick forcing of the transfer bar from the position of Fig. 5 to the position of Fig. 6. During this period one of the blank spots M of the intermittent mandrel holder drive gear is opposite the blank section M of the gear At. This causes a momentary dwell in the rotation of the mandrel holder on the shaft 43. As the transfer bar 69 moves to the position of Fig. 6, the tucker actuating lug 15 engages the stud t6 to cause swinging of the tucker arm H and tucker bar 72 from the position of Fig. 5 to the position of Fig. 6 against the tension of the spring it. Just before the tucker bar i2 moves from the position of Fig. '5 to the position of Fig. 6, the suction timing valve 83 is rotated by the shaft 35 to the position shown in Fig. 6. This connects the suction conduit 82 with the suction pump 89 and causes a suction to take place on the portion of the web which is against the transfer bar ports 19. This suction client which starts to act just before the tucker bar moves, creates a drag on the web to retard the winding of the roll on the uppermost mandrel. Inasmuch as the bed roll I4 is still rotating, a slight amount of slack will be built up in that portion of the web which is shown as engaged by the tucker bar in Fig. 6. However, as soon as the tucker bar is actuated, this slack will be taken up and, in addition, a pull will be exerted on the web by the tucker bar. Inasmuch as part of the web is temporarily held by the suction against the transfer bar, the pull exerted by the tucker bar will cause a breaking of the web on a line of perforations as at 17 (Fig. 6). The timing of the machine is such that there is a row of per-' forations, previously created by the perforating knives, located at the point 11 when the tucker bar is actuated. The newly broken web portion is then tucked into .the nip between the bed roll and the cores on the lowermost mandrel as shown rounding of the empty cores by the web and an overlapping of the tucker portion so that upon tit continued rotation of the paper cores the web will begin to wind and build up thereon The mandrel holder will again start to rotate after its momentary dwell and at the same time the cam control for the transfer bar will cause withdrawal movement of the bar in the direction indicated by the arrow in Fig. 7 and ultimately to a position clear of the rotating mandrels. As the newly started rolls on the lower mandrel move upwardly they are being continually wound, as indicated in Fig. 7, and by the time they reach the top position they are nearly fully wound. At the same time the fully wound rolls are being moved to the removal position by the mandrel holder.

It is apparent from the above that the winding operation is continuous even while the transfer of the web from one mandrel to another is being started. It is also clear that the novel transfer bar arrangement is such as to cause a. very advantageous positioning of the web Just prior to breaking and tucking. The final quick action of the transfer bar accompanied by a quick suction action, and by a quick action of the tucker bar, completes the operation and causes a completely overlapped tuck of a broken web portion to be made on the succeeding cores. The present invention makes it possible to transfer the web automatically at full winding speed after a predetermined number of sheets or footage has been wound onthe top mandrel. Due to the complete tuck-in and overlap illustrated in Fig. 6 there is no necessity for applying moisture or an adhesive to the web or empty cores in order to start winding.

While it is preferred to use the intermittent drive for the mandrel holder, in order to obtain more efiicient operation of the transfer mechanism, nevertheless the invention may be utilized in connection with a continually rotating mandrel holder.

Various other changes and modifications may be made without departing from the spirit of the invention and all of such changes are contemplated as may come within the scope of the 1 claims.

What I claim is: 1. In a rewinding machine for continuously winding a traveling web into rolls, means for creating weakened transverse tear lines in said web at spaced intervals, a rotary mandrel holder, circumferentially spaced rotatable mandrels supported in said mandrel holder, means for rotating each mandrel during part of its cycle of movement to wind the web thereon, means for rotating the mandrel holder to advance a succeeding mandrel into the path of the web which is being wound on an advanced mandrel, transfer means for deflecting a portion of the web between said two mandrels to a position partially around said succeeding mandrel while said web is still being wound on the advanced mandrel, means for thereafter momentarily retarding the winding of the web. on said advanced mandrel to create slack in that portion of the web which is partially around said succeeding mandrel, and mechanism operable on said slack while said retarding means is effective for breaking the web on a weakened tear line and causing winding on said succeeding mandrel.

2. In a rewinding machine for continuously winding a traveling web into rolls, means for creating weakened transverse tear lines in said web at spaced intervals, a rotary mandrel holder, circumferentially spaced rotatable mandrels supported in said mandrel holder, means for rotating each mandrel during part of its cycle of movement to wind the web thereon, means for rotating the mandrel holder to advance a succeeding mandrel into the path of the web which is being wound on an advanced mandrel, transfer means for deflecting a portion of the web between said two mandrels to a position partially around said succeeding mandrel while said web is still being wound on the advanced mandrel, means for creating a momentary drag on the portion of the web which is engaged by the transfer means to temporarily retard the winding of the web on said advanced mandrel and create slack in the web adjacent the succeeding mandrel, and mechanism operable on said slack while said drag is effective for breaking the web on a weakened tear line and causing winding on said succeeding mandrel.

3. In a rewinding machine for continuously winding a traveling web into rolls, means for creating weakened transverse tear lines in said web at spaced intervals, a rotary mandrel holder, circumferentially spaced rotatable mandrels supported in said mandrel holder, means for rotating each mandrel during part of its cycle of movement to wind the web thereon, means for rotating the mandrel holder to advance a succeeding mandrel into the path of the web which is being wound on an advanced mandrel, transfer means for deflecting a portion of the web between said two mandrels to a position partially around said succeeding mandrel while said web is still being wound on the advanced mandrel, suction means for thereafter momentarily retarding the winding of the web on said advanced mandrel to' create slack in the Web adjacent the succeeding mandrel, and mechanism operable on said slack while said suction means is effective for breaking the web on a weakened tear line and causing winding on said succeeding mandrel.

4. In a rewinding machine for continuously winding a traveling web into rolls, means for creating weakened transverse tear lines in said web at spaced intervals, a rotary mandrel holder, circumferentially spaced rotatable mandrels supported in said mandrel holder, means for rotating each mandrel during part of its cycle of movement to wind the web thereon, means for rotating the mandrel holder to advance a succeeding mandrel into the path of the web which is being wound on an advanced mandrel, transfer means for deflecting a portion of the web between said two mandrels to a position partially around said succeeding mandrel while said web is still being wound on the advanced mandrel, suction means for creating a momentary drag on the portion of the web which is engaged by the transfer means to temporarily retard the winding of the web on said advanced mandrel and create slack in the web adjacent the succeeding mandrel, and mechanism operable on said slack while said suction drag is effective for breaking the web on a weakened tear line and causing winding on said succeeding mandrel.

5. In a rewinding machine for continuously winding a traveling web into rolls, means for creating weakened transverse tear lines in said web at spaced intervals, a rotary mandrel hold,- er, circumferentially spaced rotatable mandrels supported in said mandrel holder, means for rotating each mandrel during part of its cycle of movement to wind the web thereon, means for rotating the mandrel holder to advance a succeeding mandrel into the path of the web which is being wound on an advanced mandrel, transfer means for deflecting a portion of the web between said two mandrels to a position partially around said succeeding mandrel while said web is still being wound on the advanced mandrel, suction means for thereafter momentarily retarding the winding of the web on said advanced mandrel to create slack in the web adjacent the succeeding mandrel, mechanism operable on said slack while said suction means is efiective for breaking the web on a weakened tear line'and causing winding on said succeeding mandrel, and a timing valve for said suction means.

6. In a rewinding machine for continuously winding a traveling web into rolls, means for creating weakened transverse tear lines in said web at spaced intervals, a rotary mandrel holder, circumferentially spaced rotatable mandrels supported in said mandrel holder, means for rotating each mandrel during part of its cycle of movement to wind the web thereon, means for rotating the mandrel holder to advance a succeeding mandrel into the path of the web which is being wound on an advanced mandrel, transfer means for defle'cting a portion of the web between said two mandrels to a position partially around said succeeding mandrel while said web is still being wound on the advanced mandrel, means for thereafter momentarily retarding the winding of the web on said advanced mandrel to create slack in a portion of the web adjacent said succeeding mandrel, and a tucker member engageable with said slack to take up the latter and break the web on a weakened tear line and then tuck said slack into a position where it is overlapped by the web'on said succeeding mandrel.

7. In a rewinding machine for continuously winding atraveling web into rolls, means for creating weakened transverse tear lines in said web at spaced intervals, a rotary mandrel holder, circumferentially spaced rotatable mandrels supported in said mandrel holder, means for rotating each mandrel during part of its cycle of movement to wind .-the web thereon, means for rotating the mandrel holder to advance a succeeding mandrel into the path of the web which is being wound on an advanced mandrel, a roll around which the web is guided positioned to be engaged by said succeeding mandrel, transfer means for deflecting and looping a portion of the web between said two mandrels to a position partially around said succeeding mandrel while said web is still being wound on the advanced mandrel, means for thereafter momentarily retarding the winding of the web on said advanced mandrel to create slack in the looped portion of the web adjacent the succeeding mandrel, and means engageable with said slack to take up the latter and break the web on a weakened tear line and then tuck said slack into the nip between said succeeding mandrel and web guiding roll when the latter are engaged.

8. In a rewinding machine for continuously winding a traveling web into rolls, means for creating weakened transverse tear lines in said web at spaced intervals, a rotary mandrel holder, circumferentially spaced rotatable mandrels supported in said mandrel holder, means for rotating each mandrel during part of its cycle of movement to wind the web thereon, means for rotating the mandrel holder toadvance a succeeding mandrel into the path of the web which is being wound on an advanced mandrel, a movably supported transfer bar movable into engagement with a portion of the web which is traveling between said two mandrels to cause looping of said web portion and to move said looped portion to a position partially around said succeeding mandrel while said web is still'being wound on the advanced mandrel, means for thereafter momentarily retarding the winding of the web on said advanced mandrel to create slack in the looped portion adjacent the succeeding mandrel, a tucker bar movable with said transfer bar and mounted for independent move ment with respect to the transfer bar, and means operable after the transfer bar has. deflected the web a predetermined distance for actuating said tucker bar, said tucker bar being positioned and timed to engage said slack in the web .to take up the latter and break the web on a weaksupported in said mandrel holder, means for rotating each mandrel during part of its cycle of movement to wind the web thereon, means for rotating the'mandrel holder to advance a succeeding mandrel into the path of the web which is being wound on an advanced mandrel, a rock shaft journaled in said machine and having a suction duct therein, cam mechanism for causing rocking of said shaft, spaced transfer bar arms secured to said rock shaft, a transfer bar connecting said arms and movable upon rocking of the shaft in a predetermined direction to engage with a portion'of the web traveling between said two mandrels to cause looping of said web portion and to movesaid looped portion to a position partially around said succeeding man- .drel while said web is still being wound on the ened tear line and then tuck said slack into a winding a traveling web into rolls, means for' creating weakened transverse tear lines in .said

web at spaced intervals, a rotary mandrel holder, circumferentially spaced rotatable mandrels supported in said mandrel holder, means for rotating each mandrel during part of its cycle of movement to' wind the web thereon, means for rotating the mandrel holder to advance a succeeding mandrel into the path of the web which is being wound on an advanced mandrel, a movably supported transfer bar movable into engagement with a portion of the web which is traveling between said two mandrels to cause looping of said web portion and to move said looped portion to a position partially around said succeeding mandrel while said web is still being wound on the advanced mandrel, suction means including suction ports in the transfer bar for creating a momentary drag on the portion of the web which is engaged by the transfer bar to temporarily retard the winding of the web on said advanced mandrel and create slack in the looped web portion adjacent the succeeding mandrel, a tucker bar movable with said transfer bar and mounted for independent movement with respect to the transfer'bar, and means operable after the transfer bar has deflected the webs, predetermined distance for actuating said tucker bar, said tucker bar being positioned and timed to engage said slack in the web to take up the latter and break the web on a weakened tear line and then tuck said slack into a. positionwhere it is overlapped by the web on the succeeding mandrel.

10. In a rewinding machine for continuously winding a traveling web into rolls, means for creating weakened transverse tear lines in said web at spaced intervals, a rotary mandrel holder, circumferentially spaced rotatable mandrels advanced mandrel, suction ports in said transfer bar, means adjacent the transfer bar arms I for connecting said suction ports in the transfer bar to the suction duct in the rock shaft, a source of suction, a suction conduit connecting said source of suction with the suction duct in the rock shaft, a timing valve connected with said conduit and driven by the machine for creating a momentary drag on the portion of the web which is engaged by the transfer bar to temporarily retard the winding of the web on the advanced mandrel and create slack in the looped portion of the web adjacent the'succeeding mandrel, a tucker bar movable with said transfer bar and mounted for independent movement with respect to the transfer bar, and means operable after the transfer bar has defiected the web a predetermined distance for actuating said tucker bar, said tucker bar being tear line and then to tuck said slack into a position where it is overlapped by the web on said succeeding mandrel.

11. In a rewinding machine for continuously winding a traveling web into rolls, means for creating weakened transverse tear lines in said web at spaced intervals, a rotary mandrel holder, circumferentially spaced rotatable mandrels supported in said mandrel holder, means for rotating each mandrel during part of its cycle of movement to wind the web thereon, means for rotating the mandrel holder to advance a succeeding mandrel into the path of the web which is being wound on an advanced mandrel, transfer means for deflecting a portion of the web between said two mandrels to a position partially around said succeeding mandrel while said web is still being wound on the advanced mandrel, means for thereafter momentarily retarding the winding of the web on said advanced mandrel to create slack in that portion of the web which is partially around said succeeding mandrel, mechanism operable on said slack while said retarding mean is effective for breaking the web on a weakened tear line and causing winding on said succeeding mandrel, and means for causing a momentary pause in the rotation of the mandrel holder while the transfer of the web is being effected.

PETER, J. CHRISTMAN.

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