US3377032A - Core enveloper - Google Patents

Description

' April 9, 196s R. J. JACOBS ET AL 3,377,032

CORE ENVELOPER 5 Sheets-Sheet l Num.

INVENTORS Filed Aug. 25, 1965 geJPz/Qyezq 24,

r 'ATTORNEYS April 9, 1968 R J, JACOBS ET AL 3,377,032

CORE ENVELOPER 5 Sheets-Sheet 2 Filed Aug. 25, 1965 AINVENTORS 000196 azjge JBZ jobefL/f ATTORNEYS April 9, 1968 R, 1, JACOBS ET AL 3,377,032

CORE ENVELOPER 5 Sheets-Sheet I5 Filed Aug. 25, 1965 INVENTORS ATTORNEYS UY mf my wv I April 9, 1968 R. J. JACOBS ET AL 3,377,032

CORE ENVELOPER Filed Aug. 25, 1965 5 Sheets-Sheet 4 INVENTORS Eobef' Jfafca 7 eozgeda @f4 ,5y M 9%: Z ATTORNEYS April 9, 1968 R, `)JACOBS ET AL 3,377,032

CORE VENVEIL'OPER Filed Aug. 25, 1965 5 Sheets-Sheet 5 E .25. f7-A' y? .5.9 65 Y? 56 65 ,//ZZ 75 a4 57 if@ .98 o 75 74 96 l? 2a I N VEN TORS faeJ/fcas 63901296 Pr er' By i@ ATTORNEYS United States Patent Oiiice 'iig Patented Apr. 9, 1968 3,377,032 CURE ENVELYER Robert 3. Jacobs, West Chester, and George J. Prager, Rosemont, Pa., assignors to Beloit Eastern Corporation, Downingtown, Pa., a corporation of Delaware Filed Aug. 25, 1965, Ser. No. 432,492 6 Ciaims. (Cl. 242-56) ABSTRACT @if THE DSLGSURE Apparatus for successively enveioping a web on a plurality of spaced cores carried on a turret. The enve loper includes a rider roll on the end of a lever arm and engaged with the periphery of the roll being wrapped by a cylinder and piston. The rider roll may con-trolmovement of the turret to bring a wound core out of a winding position and to bring a new core into position to have a web wound thereon. The web is enveloped about the core by a pressure roll and an outwardly spaced enveloper roll cooperating with the rider roll. The pressure and enveloper rolls are spaced along a common enveloper arm, pivoted to a pivoted support arm, moving the pressure and enveloper rolls into and out of enveloping association with the rider roll and core. A cylinder and piston between lthe support' arm and enveloper arm moves the enveloper arm about its axis of connection to the support arm. A second cylinder and piston connected between the frame of the machine and support arm moves the support arm into operative and inoperative positions. A knife is pivoted on the enveloper arm between the pressure roll and the enveloper roll and is operated by a cylinder and piston to sever the taut web and to guide the leading end of the severed web -to the nip between the rider roll and the Core to initiate the Winding of the web on the core. Air jets in association with the knife may I aid in the guiding of the web into the nip between the rider roll and core.

Background of the invention The proposed structure and method of core enveloping of the present invention is suitable for use with any multiple center type winder, such as a turrettype winding machine. Winders of this type consist essentially of a set of stands for supporting a shaft upon which a set of arms are mounted for rotational movement about their centers on the shaft. Chucks for holding a respective core are mounted near the end of each arm, or where a core shaft is employed in conjunction with a core, the extreme ends of the arms are fitted with bearing seats and clamps for retaining the core shaft. Since there are many variations and possibilities to the design and arrangement of these types of winders in which core enveloping is performed, the exemplication of the present invention for the purposes of maintaining clarity will be confined to only one type of turret winding machine which employs cores held in position by means of chucks.

In the chuck type of turret winding machine, means are provided on one of the arms for regulating the speed of rotation of the respective chucks. The chucks also include structures by which they can be adjusted laterally to permit the insertion and removal of cores for respectively starting a new roll and removin.o a completed roll. Aflixed to the turret shaft whichv carries the chuck supporting arms is another set of arms having guide rolls at their respective ends. The guide roil arms are spaced 90 from the chuck carrying arms and the 4two sets of arms mounted on the turret shaft comprise the turret portion of the Winder. Means are provided for rotating the turret and for indexing the respective arms to any desired position. The arms carrying the chucks can be moved laterally on the shaft t0 compensate for `the various lengths of the cores that may be employed for the start of a new roll.

In turret winding, when a roll has been formed at one end of the turret just prior to its being Wound to its final diameter, a core is inserted into the chucks at the opposite end of the turret. Once inserted, the chucks are rotated until the surface speed of the core matches the speed of the running web being wound on the existing roll. The new core, at this moment, is in a plane which is clear of the running web and its guiding rolls.

Once the new roll attains a matching surface speed with the running web and lthe winding roll has attained the desired roll diameter, the turret is rotated carrying the new roll into contact with the running web and into a position for enveloping. Structures are then employed for transferring the web from the existing roll to the new core. It is primarily these structures which are the subject of the present invention. many difficulties which are inherent Heretofore, transferring machanisms have exhibited many difiiculties which are inherent in their structures. These heretofore known transferring mechanisms are basically incapable of handling materials having varying physical characteristics such as, for example, materials ranging from an exceedingly limp to a stiff board-like condition. The difficulties of the prior art in handling different materials of varying physical characteristics are apparent in the operation of the machine during the start of a new roll.

in those instances where enveloping was performed mechanically a foldback of the web was normally employed. This success of such foldback techniques of the web for the start of a new roll was dependent upon a certain amount of inherent stiffness in the product to be enveloped. Products lacking this inherent quality could not be enveloped using the foldback method for the start of a new roll. Consequently, if the web material did not exhibit a suiicient degree of stiffness to allow the use of a foldback technique for the start of a new roll, an adhesive was required for securing the end of the web t0 the core for the start of the new roll.

Many of the known and existing enveloping and transferring mechanisms required the use of guides and/or multiple nps for trapping the leading edge of the severed web for the start of a new roll on a core. The use of such guides or multiple nips not only complicated the structure and operation of the winding machine and transferring mechanism, but often resulted in an improper start of a new roll.

Furthermore, many of the existing envelopers presently known in the art could not maintain the cuto point Of the web in close proximity to the new core for positive feeding of the web thereon for the start of a new roll. -Many of such existing env-elopers required mechanisms for conveying the leading edge of the severed web from a point of cutting the web to a point of initiating the start of a new roll on a core.

Another diliiculty found in the existing transferring mechanisms is that such machines were not capable of enveloping cores of varying diameters, particularly in the start of a new core having a diameter different from that of the core of a previous completed roll.

Many of the prior known envelopers which are capable of enveloping cores of varying diameters require a change in the knife position for cutting the web when the roll is completed. Such change in position of the knife with changes in core diameter require additional structures resulting in more complicated mechanisms and more complicated operations of the machine.

In addition, many of the prior known envelopers are not capable of adjusting the desired completed diameter of a roll. That is, the amount of enveloping on a particular core could not be varied to allow the enveloping of rolls to any desired size.

Still another dilculty found in many of the prior known envelopers is that the transfer of the running web to a new core in the start of a new roll could not be performed under high speed enveloping conditions.

Summary and Objects of .the invention It is, therefore, an object of the present invention to provide a core enveloper and transfer mechanism which is adapted to envelop a web about a core and upon completion of a roll to transfer the Web to a new core.

It is another object of the present invention to provide a core enveloper and a transfer mechanism which is adapted for handling Web materials of varying physical characteristics.

Still another object of the present invention is to provide a core enveloper and a transfer mechanism which is adapted for enveloping materials on cores of varying diameters.

Yet another object of the present invention is to provide a core enveloper and a transfer mechanism which does not require the use of adhesives for transferring the severed end of a web to a new core.

Another object of the present invention is to provide a core enveloper and transfer mechanism which does not require the use of a foldback on the severed end of a web to envelop the web on a core.

Still another object of the present invention is to provide a method of core enveloping and transferring of a web material from a completed roll to a new core for the start of a new roll.

Another object of the present invention is to provide a core enveloper which employs a minimum number of rolls and nips for trapping the leading edge of a severed web for the start of a new core.

A further object of the present invention is to provide a core enveloper which eliminates the need for guide rolls for trapping the leading edge of a severed web for the start of a new core.

Another object of the instant invention is to provide a core enveloper which is adapted for completing a roll of material on a core to any desired diameter.

The instant invention accomplishes these objectives by the novel features and structures thereof which include an enveloper arm having a roll at one end thereof for engaging the trailing portion of a web from a completed roll and wrapping the trailing portion partially around a new core. A knife is pivotally mounted on the enveloper arm and serves to sever the web and assist the leading edge to be trapped on the new core for the start of a new roll.

Another feature of the present invention resides in the provision of a rider roll which provides a nip with the core to be enveloped for trapping the leading edge of the severed web from the point of severance by the knife. The rider roll is pressed into engagement with core by pressure means operated at predetermined pressure suicient to maintain the periphery of a roll which is being enveloped horizontal. This novel provision allows for the enveloping of cores of various diameters and for adjustment of the Winder to the selected desired completed diameter for a roll.

Another novel feature of the present invention resides in the provision of a pressure roll disposed for cooperation with a new core for maximum Wrapping of the trailing portion of a web from a substantially completed roll around the new core.

Still another novel feature of the present invention resides in the provision of an air manifold providing an air blast which cooperates with the knife to start a severed edge of the web on a new core.

These and other objects, features and advantages of the present invention will be more fully realized and understood from the following detailed description when taken in conjunction with the accompanying drawings wherein:

FIGURE 1 is a side elevational View of a turret winding machine and core enveloper of the present invention;

FIGURE 2 is a diagrammatic showing of the Winder and core enveloper of the present invention during the final Windup of a substantially completed roll;

FIGURE 3 is a diagrammatic showing of the Winder and core enveloper during a transfer of a substantially completed roll from the windup position to the removal position',

FIGURE 4 is a diagrammatic showing of the Winder and core enveloper with a new core in position for effecting a transfer of the web material thereto;

FIGURE 5 is a diagrammatic showing of the Winder and core enveloper of the present invention with the enveloper arm moved into a position of Wrapping the web on the new core.

FIGURE 6 is a diagrammatic showing of the transfer mechanism in position With respect to the Winder mechanism to effect a severance of the Web and a proper transfer of a severed end of the web to a new core;

FIGURE 7 is a diagrammatic showing of the core enveloper With the web severed and with the leading edge thereof initiating a new roll;

FIGURE S is a diagrammatic showing of a completed roll at one end of the core enveloper and the beginning of a new roll at the other end thereof; and

FIGURE 9 is a broken-out detail view of one end of the enveloper arm and knife in cooperation with the web and the core.

Like reference numerals throughout the various views of the drawings are intended to designate the same or similar structures.

When preferred, a form of the present invention is exemplified in FIGURE 1 in conjunction with a turret Winder and generally designated with the reference numeral 10. It is to be understood that the present invention may be employed in conjunction with any multiple center type Winder and that the turret-type winding machine 10 is shown only for purposes of exemplification. Since both sides of the illustrated structures in the figures are substantially identical, only one side Will be described and referred to hereinbelow.

The turret Winder 10 includes a support stand 12 mounted on a base 13 and having a bearing block 14 mounted on an upper end thereof. A shaft 15 is journalled in the bearing block 14 and a turret 18 is mounted on the shaft 15. The turret 18 includes a pair of core-supporting arms 19 and 20, and a pair of guide roll arms 21 and 22.

A pair of bearing blocks 23 and 24 are adjustably supported in the ends of the respective core-supporting arms 19, 20. A pair of chucks 26 and 27 are journalled for rotational movement in the bearing blocks 23, 24 respectively. A core 28 is clamped Within the chuck 26 and a core 29 is clamped Within the chuck 27 for receiving and supporting a web of material thereon.

A sprocket and chain or a pulley and belt arrangement may be employed for driving the respective chucks, 25, 27 to impart rotational movement to the cores 28, 29. As illustrated, a sprocket Wheel 3) is secured to the chuck 26 and a link chain 31 extends 4between the sprocket 30 and a sprocket 32 rotatably mounted on the shaft 15 and secured to and driven by a sprocket 33. Similarly, a sprocket 34 is secured to the chuck 27 and a link chain 35 extends from the sprocket 34 to a sprocket 37 rotatably mounted on the shaft 15 and secured to and driven by a sprocket Wheel 39. In FIGURE l, the sprockets 33 and 39 are shown one behind the other as are the sprockets 32 and 37.

A link chain 40 extends betwen the sprocket wheel 33 and a sprocket wheel 41. A motor 42 has an output thereof connected through a transmission and gear train 43 to an output shaft 44 to which the sprocket wheel 41 is secured for providing rotational movement through the link chain and sprocket arrangement to the core 28. Similarly, a link chain 46 extends between the sprocket wheel 39 and a sprocket Wheel 47. A motor 48 has an output thereof connected through a transmission and gear train 49 to an output shaft Si) thereof. The sprocket 47 is mounted on the output shaft 50 and provides rotational movement through the associated chain and sprocket arrangement to the core 29. In this manner, a separate drive is provided for the respective cores 28, 29 mounted on the turret 1S.

Also mounted on the shaft behind the turret 18 as viewed in FIGURE l is a gear wheel 52 driven from a source of motive power (not shown). The gear wheel S2 is keyed or otherwise secured to the shaft 15 and through the shaft 15 provides rotationai movement to the turret 1-8.

Bearing blocks S3 and 54 are mounted at the ends of arms 21, 22 respectively. A shaft 56 is journalled in the bearing block 53 and supports a guide roll 57 thereon. Similarly, a shaft 58 is journalled in the bearing block S4 and supports a guide roll 59 thereon.

The position of a completed roll of web material on the core 28 is illustrated by a phantom line 60. A trailing portion of the web from the roll 66 is shown by a phantom line 61 passing over the guide roll 59.

A frame 62 supports a group of rolls 63, 64 and 65' over which a web 67 is supplied to the core 29. A crank 68 is mounted on a shaft 70 which is journalled for rotation in a bearing block 71 supported by the frame 62. The crank 68 includes a pair of arms 72 and 73 disposed substantially at right angles to one another. A rider roll 74 is journalled in the end of the arm 73 and provides a nip for the web 67 with the core 29. The end. of the arm 72 is connected to a piston rod 77 of an air cylinder 78. The stationary end of the air cylinder 73 is pivotally mounted on a block 79 secured to the frame 62. With such arrangement, therefore, retraction of the piston rod 77 into the Aair cylinder' 78 raises the rider roll 74 from l the core 29.

The crank 68 supports the rider roll 74 onthe roll being enveloped on the core 29. When the roll has achieved a small increase in its diameter by the enveloping of the web 67 thereon, the arm 73 is raised accordingly. Raising the arm 73 may actuate a conventional indexing means (not shown)` to cause rotation of the turret 18 until the arm y73: is allowed to regain its initial position at the start of a new roll. Therefore, the rider roll 74 supported on the crank 68 not only provides a nip for the web 67 in the initiation of a new roll, but maintains the upper most point of the roll at a fixed horizontal line. The indexing means may be preset to envelop any desired diameter of web 67 on the core 29.

` A lower enveloper arm 8@ is pivotally mounted with respect to the frame `62 on a shaft El. The lower enveloper arm 80 includes an extension S2 having a piston rod S3 of an air cylinder 84 connected to the one end thereof. The stationary end of the air cylinder ytia is pivotally mounted on a block 816 secured to the frame 62. Therefore, when the lpiston rod 83 is extended from the air cylinder `841, the lowerenveloper arm 80 is lowered to a substantially vertical position.

Pivotally mounted at the extended end of the lower enveloper arm 80 is an upper enveloper arm 87. The upper enveloper arm r9:7 includes an extension 88 connected to a piston rod 89 of an air cylinder 90. The stationary end of the air cylinder 90 is pivotally mounted on a block 91 secured to the lower enveloper arm 8%.

As more clearly illustrated in FIGURES 2 to 8 and more particularly in the detailed View of FIGURE' 9, a pair of slide members 92a and 92h are mounted on the upper enveloper arm 87 and adjustably support a plate 93 therebetween. Pivotally mounted on the plate 93 is a pressure roll 94 which is disposed for engaging the web 67 against the core 29. A plurality of tapped adjusting holes 87a are provided in the upper enveloper arm 87 each located substantially midway between the slide members 92a, 92b. The plate 93 includes a hole 93a therein which is shown in alignment with one of the tapped holes 37a. A threaded pin 93b, or similar retaining member, is received in the hole 93a and threadably engaged in a respective one of the tapped holes 87a for fixing the position of the piate 93 and the pressure roll 94- with respect to the core 29. This adjusting feature allows various sizes of cores to be employed in the system of the present invention by movement of the plate 93 with respect to the upper enveloper arm 87. lt is to be understood that any well known adjusting means may be provided for effecting the same results. Furthermore, the plate 93 may be adjustable to any number of positions, as desired, and as dictated by the core sizes to be employed. If desired, the plate 93 may be adjustable to an innite number of positions by the use of clamping means between the plate 93 and the members 92a, 92h or by other well known and suitable means for variably adjusting the plate 93.

As illustrated, the pressure roll 94 is spaced from the extreme end of the arm 87. An enveloper roll 96 is supported on a shaft 97 which is pivotally mounted on the extreme end of the arm 57 such that it is supported a predetermined distance above the pressure roll 94 and the top, uppermost point of the core 29. A crank 9S is pivotally mounted on the shaft 97 and supports on one arm 99 thereof a knife blade 100. Another arm 101 of the crank 98is connected to a piston rod N2 of an air cylinder 103. The air cylinder 163 is pivotally mounted on a block 14M secured to the upper enveloper arm 87 as shown in FIG- URE l. When the piston rod l0?. is extended from the air cylinder 103, the knife 'blade 10i? is moved to the position shown by the phantom lines in FIGURE 9. However, when the piston rod 102 is retracted within the cylinder 163, the knife blade 19t) is moved to the full line position as illustrated.

Because of the adjustability of the plate 93 and the pressure roll 94, the knife blade remains in the same firing position regardless of the core size. As previously mentioned, this is accomplished by manually repositioning the pressure roll 94 in accordance with the pretapped holes 27a in the upper enveloper arm V87. Therefore, if a new core size is employed in the Winder, the pressure roll 94 is adjusted in accordance with that size to maintain the position of the knife biade 196) fixed with respect to the core 29 and the rider roli '74.

An air manifold 106 is secured to the arm 99 and supports the knife blade 160 on an undersurface thereof. A plurality of apertures 107 extend from the air manifold 196 through the knife blade 10i@ and in the cutting position of the knife blade. The apertures 107 are directed toward the severed leading edge of the web 67 and direct the severed edge into the nip provided by the core 29 and the rider roll 74. As illustrated in FIGURE 9, the severed leading edge of the web 67 is being directed into the nip for the start of a new roll on the core 29. In operation, when the web is severed by the actuation of the knife 10i), an air blast is actuated through the air manifold 106 and the apertures 197 to not only direct the severed edge of the web into the nip, but to 4provide a tight Wrap of the leading edge portion of the web 67 onto the core 29.

As illustrated in FIGURE 9, the severed leading edge of the web 67 may be directed into the nip for the start of a new roll on the core 29 by means of the knife blade 196 only. That is, the air blast from the apertures 197 are not necessary for satisfactory operation of the mechanism and are employed as a secondary precaution only for effecting the transfer.

It can be readily appreciated from FIGURE 9 that the novel structures of the present invention are so arranged to provide maximum amount of wrapping of thel leading edge of the web 67 onto the core 29 while maintaining the knife position such that it will direct the severed edge of the web 67 into the nip provided between the core 29 and the rider roll 74. This arrangement results from the location of the pressure roll 94 with respect to the core 29 and the rider roll 74 and the location of the enveloper roll 96. As shown, the pressure roll 94 is located such that it provides maximum wrap of the leading edge portion of the web 67 around the core 29 without interfering with the swing of the arm 99 carrying the knife 100. The enveloper rol1 96 is located as close as possible to the rider roll 74 without interfering with the travel of the web 67 thereover to the core 29. Therefore, when the knife blade 100 is actuated by the cylinder 193 to the cutting position, the leading severed edge of the web 67 is trapped thereby and must proceed into the nip provided between the core 29 and the rider roll 74 for the start of a new roll thereon. If desired, the angular position of the knife 100 with re spect to the arm 99 may be shifted to allow the knife 100 to be brought into closer position to the nip. Also, the aperture 107 through which an air blast is provided onto the severed edge portion of the web 67 may be more angularly disposed with respect to the knife blade such that the air blast will be directed more toward the nip.

The sequence of operation of the core enveloper of the present invention can be more readily appreciated from the diagrammatic illustrations of FIGURES 2 to 8. As shown in FIGURE 2, a substantially completed roll indicated with the reference numeral 110 has been wound on the core 29. As illustrated, the turret 18 'has been indexed through a predetermined arcuate displacement to maintain the uppermost point of the roll 110 at a fixed horizontal line, As lpreviously mentioned, indexing may be controlled by the position of the rider roll 74 relative to the axis of the core. When the turret has been rotated to such a position as determined by the desired diameter of the roll 110, the transferring operation of the web 67 from the completed roll 110 to the start of a new roll on the core 28 is initiated. During the build-up of the roll 116 from the web 67, the lower enveloper arm 80 is retracted by the actuation of the air cylinder y84 which removes the upper enveloper arm 87 from within the turret 1S or from the position illustrated in FIGURE 1.

When the transferring operation is initiated, the turret 18 is rotated in the direction as indicated by the arrow 112 in FIGURE 3. Immediately upon initiation of the transfer operation, the air cylinder 7S is actuated to raise the rider roll 74 on the crank 68. The rider roll 74 is raised a sufficient distance to allow rotation of the turret 1S and passage of the guide roll S7 past the rider roll 74. During the transferring operation, the roll 110 continues to be enveloped with the web material 67. As illustrated in FIGURE 3, the lower enveloper arm 80 is maintained in a retracted position to allow the roll 110 to be rotated to the completed position thereof.

As the turret 18 rotates during the transfer operation, the guide roll 57 comes into Contact with the web 67 which is supported between the rider roll 74 and the completed roll 11?. The turret `18 continues to rotate until the core 28 is brought into position in contact with the web material 67 supported between the guide roll 57 and the rider roll 74. The arms 19, of the turret 18 are at this point in the sequence substantially horizontal or at such position whereby the uppermost point of the core 28 is disposed at the fixed horizontal line determined by the position of the rider roll 74 during the enveloping operation. When this position is reached, the turret 18 is stopped in its rotation and its subsequent movement may be controlled thereafter by the position of the rider roll 74 after the rider roll 74- is lowered onto the core 28 engaging the web 67 therebetween. Such position of the turret 18 is illustrated in FIGURE 4.

Upon complete rotation of the turret 1S to the position illustrated in FIGUR-E 4, the lower enveloper arm 80 is raised by the actuation of the air cylinder 84 causing the enveloper roll 96 to engage the web material 67 at a portion thereof which is supported between the core 28 and the guide roll 57. The enveloper roll 96 picks up the web 67 and effectively wraps the web 67 substantially around the core 28, as illustrated in FIGURE 5.

At this point in the sequence of the transferring operation, the upper enveloper arm 87 is actuated by the air cylinder 90 to cause the pressure roll 94 to come in contact with one layer of the web material 67 which is wrapped around the core 28 and extends over the enveloper roll 96, the guide roll 57, and to the core 29, as illustrated in FIGURE 6. As shown, the web 67 due to the position of the rider roll 74 and the relative position of the enveloper roll 96 is wrapped to a maximum amount about the core 28. As illustrated in FIGURE 6, the rider roll 74 has been lowered to provide a nip for the web mate-- rial 67 with the core 28.

FIGURE 7 illustrates the next step in the sequence of the transferring operation. The knife 100 is brought into contact with that portion of the web material 67 which is supported between the core 23 and the enveloper roll 96 by the actuation of the air cylinder 103. The web 67 is severed and the trailing edge thereof is wound onto the roll to complete the enveloping thereof. The leading edge of the severed web is guided into the nip `provided between the rider roll 74 and the core 28 by the blade 100. During this cutting operation, an air blast may be provided through the air manifold 106 and the apertures 107 to not only aid in guiding the leading edge of the web 67 into the nip, but to provide a tight wrap of the leading edge portion of the web 67 onto the core 28. During the cutting operation, the pressure roll 94 holds the leading edge portion of the web 67 onto the core 28 such that the knife and/ or the air blast can guide the leading edge into the nip provided between the rider roll 74 and the core 28.

As illustrated in FIGURE 8, the roll 110` has been cornpleted and is ready to be removed from the turret 18. A new roll 114 is initiated on the core 28 and the upper enveloper arm 87 is retracted by actuation of the air cylinder 90 away from the new roll 114. After a sufcient but small amount of the new roll 114 has been enveloped about the core 28, the rider roll 74 will be raised by the web wrapped about the core. The turret 18 may then be indexed to maintain the uppermost point of the roll 114 at the fixed predetermined horizontal line.

The principles of the invention explained in connection with the specific exemplications thereon will suggest many other applications and modifications of the sarne. It is accondingly desired that, in construing the breadth of the appended claims they shall not be limited to the specic details shown and described in connection with the exemplifications thereof.

We claim as our invention:

r1. A mechanism for transferring a traveling web being wound onto a roll onto a fresh core which comprises,

(a) means for supporting a core,

(b) a first guide roll positioned to guide an oncoming web onto the core,

(c) a second guide roll positioned between the core and a roll being wound, said `guide rolls being movably positioned and movable between an open position spaced from the core and a closed position adjacent the ycore wherein the web wraps the core by an angle greater than (d) a knife means movable in the path between the core and said second roll in the direction of surface rotation of the core and cutting the web and guiding the cut end thereof in the direction of core rotation to Abe caught in the nip formed between the oncoming web and the core,

(e) a third guide roll positioned ahead of the second guide roll in the direction of web travel and forming a pressure nip with the core in said closed position holding the web tight to the corex in advance of said knife means,

(f) a carrying arm supporting said second and third rolls in said open and said closed positions,

(g) a support ann with said carrying arm mounted thereon,

(h) power means for moving the support arm from said open to closed position,

(i) second power means carried on the support arm and moving said carrying arm from open to closed position, and

(j) power operating means mounted on the carrying arm and operatively connected to said knife means.

2. The structure of claim 1 wherein the knife is pivotally mounted on the carrying arm for movement about the axis of the second roll and is spaced from said axis towards said third roll and, wherein the power means comprises a uid pressure operated cylinder and piston pivotally mounted on said carrying ann and having operative connection with said knife for swinging said knife about the axis of said second roll, and wherein the third roll is adjnstably mounted on said arm to accommodate said third roll to cores of varying diameters.

3. A mechanism for transferring a traveling web being wound onto a roll onto a fresh core which comprises,

(a) means for supporting a core,

(b) a first guide roll positioned to guide an oncoming web onto the core,

(c) a second tguide roll positioned between the core and a roll being wound,

said guide rolls being movably positioned and movable between an open position spaced from the core and a closed position adjacent the core wherein the web wraps the core by an angle greater than 180,

(d) a knife means movable in the path between the core and said second roll in the direction of surface rotation of the core cutting the web and guiding the cut end thereof in the direction of core rotation to be caught in the nip formed between the oncoming welb and the core,

(e) a third guide roll positioned ahead of the second guide roll in the direction of web travel and forming a pressure nip with the core in said closed position holding the web tight to the core in advance of said knife means, and

(f) a pivotably mounted support arm,

(g) means to actuate said support arm,

(h) a carrying arm pivotably mounted on said support arm supporting said second and third rolls for simultaneous movement between said open and said closed positions,

(i) lever means supporting said knife means on said carrying arm for movement into and out of the space lbetween said second and third rolls, for severing the web and guiding the leading end of the severed web into the nip between said rst guide roll and said core,

(j) and fluid pressure operating means on said carrying arm having operative connection with said knife means for moving said knife into an extended web severing and guiding lposition and into a retracted position upon severing of the web.

4. The structure of claim 3 wherein the third roll is selectively positionable on said carrying arm in accordance with the diameter of the core being enveloped, and

wherein the fluid pressure operating means comprises cylinder and piston means pivoted on said carrying arm and having operative connection with said knife.

5. In a device -for successively enveloping a web being wound on one core to a second core spaced from said one core,

(a) a frame,

(b) a turret rotatably supported on said frame and having an arm having a core at each end thereof,

(c) means rotatably moving said turret to bring a wound core out of winding position and to bring a new core into position to have a web wound thereon,

(d) an arm pivotally mounted on said frame,

(e) a rider roll rotatably supported on said arm and movable into position to provide a nip between said roll and core,

(f) fluid pressure operated cylinder and piston means moving said arm and rider roll into and out of nip forming association with the core and maintaining a selected pressure on the core,

(g) a support arm pivotally mounted on said frame for movement about an axis parallel to the axis of pivotal movement of said first mentioned arm,

(h) an enveloper arm pivotally mounted on said support arm,

(i) an enveloper roll rotatably mounted on the end of said enveloper arm,

(j) a pressure roll rotatably mounted on said enveloper arm inwardly of the end thereof, fluid pressure operated cylinder and piston means connected between said support arm and said enveloper ann for bringing said enveloper arm and the roll supported thereon into enveloping association with the core,

(k) other fluid pressure operated cylinder and piston means connected between said frame and said support arm for bodily moving said enveloper arm towards and from the core,

(l) a knife lever pivotally mounted on said enveloper arm,

(m) a web severing knife on the end of said knife lever and positioned by said knife lever to sever the web in the space between said pressure roll and said enveloper roll,

(n) fluid pressure operated cylinder and piston means connected between said enveloper arm and said knife lever for moving said knife lever and the knife thereon into position to sever the web ibetween said pressure and enveloper roll, and to guide the web into the nip between said rider roll and core.

6. The structure of claim 5 wherein the pressure roll is selectively positionable on said enveloper arm in accordance with the diameter of the core being enveloped, and wherein means are provided to hold said knife aun in a selected position .of adjustment.

References Cited UNITED STATES PATENTS 2,585,227 2/ 1952 Christman 242-5 6.6 2,586,833 2/ 1952 Kohler et al. 242-5 6 2,787,427 4/ 1957 Marczincsin 242-5 6 2,860,839 ll/l958 Bower 242-64 X FOREIGN PATENTS 750,112 6/1956 Great Britain.

WILLIAM S. BURDEN, Primary Examiner.

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