US 3369766 A
Abstract available in
Claims available in
Description (OCR text may contain errors)
' Feb; 20, 1968 wLH. HERMAN I 3,369,766
WWWWWWWW NG Filed May 17, 1966 4 Sheets-Sheet l Flg I INVENTOR.
WALTER H. HERMAN ATTORNEY I Feb. 20, 1968 H HERMAN WEB WINDING 4 Sheets-Sheet 2 Filed May 17, 1966 Fl INVENTOR.
WALTER H. HERMAN ATTORNEY Feb. 20, 1968 w. H. HERMAN WEB WINDING Filed May 17, 1966 4 Sheets-Sheet 3 6 INVENTOR. WALTER H. HERMAN BY V ATTORNEY a Feb. 20, w M N WEB WINDI NG Filed May 17, 1966 4 Sheets-Sheet 4 INVENTOR. WALTER H. HERMAN ATTORN EY United States Patent 3,369,766 WEB WINDlNG Walter H. Herman, South Hadley, Mass., assignor to Scott Paper Company, Philadelphia, Pa., a corporation of Pennsylvania Filed May 17, 1966, Ser. No. 550,738 11 Claims. (Cl. 24256) This invention relates to improvements in web winding, and more particularly, to a new and improved method and apparatus for continuously converting a web of sheet material from a single large parent or mill roll into a plurality of relatively small rolls to be sold to consumers.
In the past, it has been the practice to wind consumer product rolls of sheet material such as toilet tissue, paper toweling, and the like by means of automatic winding equipment of the so-called continuous type. One of the problems experienced with this type of equipment has been that of effecting a transfer of the web running to a nearly completed wound roll on one mandrel to the empty core on a succeeding mandrel in order to commence the winding of a new roll. Although a large variety of methods and apparatus have been devised to accomplish this task, none of these have been entirely satisfactory and sufficiently reliable. The defects experienced with these prior methods and apparatus have become more prevalent with the requirement for new higher speed winders capable of continuous operation at web speeds on the order of 2000 feet per minute and higher.
One of the most commonly employed methods for accomplishing transfer of a web to an empty core involves applying adhesive to the surface of the core in a thin layer by means of an applicator roller and thereafter advancing the coated core to a web pick-up position adjacent the bed roll. The core is rapidly rotated prior to or after adhesive application so that the velocity of its surface is substantially equal to the velocity of the traveling web. The web is severed from the previous roll and moved into contact with the coated core to commence the winding of a new roll.
Several problems, common to most known methods of web transfer, are present with the above method. Initially, it will be apparent that in order to insure reliable and successful web transfer, an excessive amount of adhesive must be applied to the core. It is necessary to apply adhesive in stripes to the entire circumference of the core. Additionally, such rapid rotation of the core as is necessary to match its surface velocity to that of the web results in the flinging of some of the glue off of the core and onto the web and surrounding equipment resulting in considerable mess and product contamination. The resulting product rolls have had a substantial number of web layers near the center of the roll adjacent the core adhered together or stained due to permeation or absorption of the excess adhesive on the core through the several web layers. This waste is costly both to the consumer and the manufacturer.
In view of the above shortcomings and difliculties experienced wit-h prior methods and apparatus, it is a prin ciple object of the invention to provide a new and improved method and apparatus for effecting a transfer of the web from a wound roll on one mandrel to an empty core on a succeeding mandrel.
It is an additional object and advantage of the invention to provide a new and improved means for use in combination with web winding equipment which means operate during the rotation of a principle support roll such as a bed roll for causing ejection and retraction of members such as knife blades, etc., from within the surface of the rotating support roll in order to perform functions during the winding operation.
In accordance with the method of the invention, a web is advanced in synchronism with a supporting roll and arranged in partial wrapping engagement therewith, thereafter running to a web roll being wound on a first mandrel. A transverse segment of the web in contact with the surface of the support roll is lifted to and supported at a first position outwardly disposed from the surface of the support roll during movement of the web along a portion of the path of the web travel. Adhesive is applied to at least portions of the lifted and supported transverse segment after which the transverse segment is further advanced along the path of web travel toward a pickup position adjacent to which a successive core is positioned, rotatably supported upon a successive mandrel. The web is severed along a transverse line of severance in front of the transverse segment to form a tail end to the web being wound and an advancing leading end to the web to be wound. Substantially simultaneously therewith the transverse segment is urged outwardly to a second position more remote from the surface of the support roll and the adhesive-coated portions thereof are pressed into contact with the successive core upon which the web is to be wound. In this manner, web transfer is accomplished according to the invention.
Apparatus for accomplishing the method of the invention will be described in detail below and from the description it will be apparent that a large number of variations could be employed to accomplish winding in accordance with the invention. The preferred embodiment of the invention includes means for supporting a web traveling to a roll that is being wound, a plurality of rotatably mounted roll cores, means for successively moving rotatably mounted roll cores to a pickup position and to a winding position, means for lifting and supporting a transverse segment of the web at a first position outwardly spaced from the support means, means for applying adhesive to at least portions of the transverse segment while it is in the first position, means for severing the web along a transverse line in front of the transverse segment, and means for urging the transverse segment to ward a second position more remote from the support means into contact with a fresh rotating roll core upon which the web is to be wound to commence the winding of a new roll. In accordance with the invention, the means for severing and the means for urging are preferably adapted for substantially simultaneous operation.
It is an advantage of the invention to provide a means for effecting transfer of a web by which the adhesive coated portion of the web adjacent the advancing leading edge of the web is positively pressed into engagement with the surface of a fresh roll core carried on a rotating mandrel. This insufes a reliable attachment of the web to the core, assuring that the commencement of a new roll will begin. It is also believed to be an important feature of the invention that severance of the web from the roll being wound is not performed until the time of attachment of the web to a new core or, in some instances, shortly thereafter.
One feature of the invention which advantageously contributes to the success of the method of web transfer is the use of a new and improved operating mechanism as an element of the invention which moves members from positions within the rotating bed roll in a manner which has not been possible previously in high speed winders. The above, in part, renders the web transfer method of the invention practical and capable of superior performance heretofore unrealized and unexpected.
Additional objects and advantages of the invention will become apparent from the following detailed description thereof, read in conjunction with the accompanying drawings, in which:
FIGURE 1 is a side elevation view, partly schematic, illustrating the general layout of apparatus of the invention,
FIGURE 2 is a sectional elevation view of a glue metering and transferring device emloyed with the invention,
FIGURES 3, 4 and 5 are partial sectional views showing portions of the apparatus of FIGURE 2 and illustrating positions of the apparatus during various steps of the method,
FIGURE 6 is a bottom view of the apparatus shown in FIGURE 2 illustrating a modified embodiment thereof,
FIGURES 7 and 8 are schematic elevation views illustrating the combination of the apparatus shown in FIG- URE 2 with diiferent transfer means,
FIGURE 9 is a perspective view showing parts in section of a latched control mechanism employed with the invention,
FIGURE 10 is an elevation view illustrating the latched control mechanism at one position in its operation,
FIGURE 11 is an elevation view of a cam employed with the latched control mechanism of FIGURE 9 for accomplishing the method of the invention, and
FIGURES l2, 13, 14 and are partial elevation views illustrating the position of various portions of the app-aratus during sequential steps of the method of the invention.
General description of web winding method and apparatus Referring to FIGURE 1 of the drawings, the apparatus shown comprises a rotatably mounted parent or mill roll 10 from which a web 11 is withdrawn and fed by means of a guide roll 12 into partial wrapping engagement with the surface 13 of a rotating support roll 14 over which the web 11 is advanced to a wound roll 16 rotatably carried by one of a plurality of mandrels 15. The mandrels 15 are carried upon the arms 17 of a supporting winder turret 18 which is adapted for rotation, controllable by means of an indexing mechanism such as the type known as a Geneva mechanism. In this manner, the mandrels 15 are carried in revolution past a pickup position, indicated generally by reference numeral 19, adjacent the surface 13 of support roll 14 and, hence, to a winding position, indicated generally by reference numeral 20, spaced from the surface of the roll.
A glue metering and dispensing means, illustrated generally by reference numeral 21, is positioned adjacent the surface 13 of support roll 14 between the pickup position 19 and the point where the web 11 running to the parent roll first contacts surface 13 of support roll 14. Glue means 21 is adapted to separate a predetermined amount of adhesive from a glue reservoir and to extend it on a tongue member 22 toward the web to a position in which it may be picked up by the web 11 during a subsequent stage in the performance of the method of the invention. Details of glue metering and dispensing device 21 will be subsequently described with reference to FIGURES 2 through 8.
In accordance with the invention, means are provided to lift a transverse segment of the web 11 to a first position outwardly spaced from the surface 13 of support roll 14 to support the transverse segment in this position during a portion of the revolution of support roll 14. During this portion of the revolution of support roll 14, the web 11 is moved past a position of interference with the adhesive carried upon the tongue member 22 of glue metering and dispensing device 21 in order to accurately provide a predetermined amount of adhesive to a preselected portion of web 11. Provision is further made in accordance with the invention for further urging and moving the transverse segment of the web 11 to a second position more outwardly spaced from surface 13 of roll 14 in which it will be pressed into contact with a fresh empty core carried by a succeeding mandrel 15. Provision is also made to sever the web 11 in front of the transverse segment at a time substantially simultaneous with the pressing of the transverse segment into contact with the fresh core to form the tail end of the preceding wound roll and to commence the winding of a new web roll. In accordance with the invention, the lifting and supporting means 23 and severing means 24 are mounted internally of the support roll 14 and, by a new and improved operating mechanism (not shown in FIGURE 1), these means are controllably operated and ejected outwardly from the surface 13 of support roll 14 and retracted inwardly into the support roll 14 to perform their intended service.
Glue metering and transfer Referring now to FIGURES 2 through 5 of the drawings, there is shown a housing indicated generally by reference numeral 30, which includes a front wall 31 and a converging wall 32, the plane of which is arranged to intersect the plane of front wall 31 at an angle of less than Two spaced side walls 33 connect with front wall 31 and converging wall 32 to define a chamber 34, within which adhesive is retained. Converging wall 32 has a flexible portion 35 extending along and comprising its side portion which is disposed adjacent side wall 31 and in contact therewith when in the undistorted or relaxed and closed position. Strip 35 may be comprised of any type of flexible resilient material such as rubber which may be bent to one side or another out of the plane of converging wall 32 upon the application of force. Strip 35 may be sealingly attached to converging wall 32 as by a series of bolts 36.
A tongue member 37 (number 22 in FIGURE 1), is disposed within the chamber 34 defined by the housing 3t) and is mounted for reciprocation in a plane parallel and adjacent to the plane of front wall 31 so that its bottom surface 38 will be advanced toward and away from the line of intersection of the plane of front wall 31 with the plane of converging wall 32. The bottom edge surface 38 is in a plane parallel to the line of intersection described above. In addition, the plane of bottom edge surface 38 is angularly disposed to the plane of front wall 31 and the plane of converging wall 32. Bottom edge surface 38 terminates directly at a line of contact with front wall 31.
The action of tongue member 37 is controlled by a valve 39 which governs the operation of a double action air cylinder 40. The piston 41 of air cylinder 40 is operably connected to the end of tongue member 37 opposite bottom edge surface 38. Valve 39 connects air line 42 to air cylinder 40 through feed lines 43 and 44, alternatively. In other embodiments, the operation of valve 39 may be performed by hand or may be controlled by connecting it with the operation of other equipment such as the web handling machine or continuous winding machine (shown in FIGURE 1) for forming rolled paper products in a manner which is well known or understood in the art and employed with like equipment. Obviously, other types of actuation means could be employed.
In some instances, it is desired to dispense, with a device'- of this type, metered amounts of an adheive which is relatively fat-drying or which contains relatively volatile ingredient and, therefore, is susceptible to damage or deterioration upon prolonged exposure to air. It is also desired in some instances to continuously circulate glue through a heating means in order to maintain it at the desired viscosity for metering and application. As shown in FIGURE 2, glue may be circulated through the chamber 34 within housing means 30 by means of feeding it into chamber 34 through one or more inlets 45 on housing means 30 and withdrawing it from chamber 34 through one or more outlets (not shown) into opposite end on housing means 30. In this manner, a heater (not shown) and/or a pump (not shown) may precede inlet 45 and be arranged to circulate glue from a remote supply reservoir (not shown) through the housing means 30 in a continuous manner thereby insuring at all times a fresh supply of adhesive having the desired properties. The housing means 38 may be fitted with a lid (not shown) which sealingly covers the top portion thereof and is in frictional contact with the moving tongue member 37.
FIGURES 3, 4 and 5 progressively illustrate the manner in which the adhesive metering and dispensing device of FIGURE 2 operates to dispense a predetermined amount of adhesive. In the light of the above-described structure, it can be seen that when the double action air cylinder 46 is actuated to reciprocably move tongue member 37 along the plane adjacent to front wall 31, the bottom edge surface 38 will be reciprocably moved from a first position within the chamber 34 spaced from and out of contact with the converging wall 32, as shown in FIGURE 3, through a second position wherein one edge bounding the surface 38 is in contact with converging wall 32 and, more specifically, the flexible portion 35 extending along and comprising the one side thereof, as shown in FIGURE 4. In this position, a reservoir or cavity 46 is defined by outline of the front wall 31, the converging wall 32, side walls 33 and the bottom edge surface 38 such that a metered amount of adhesive is separated and contained therein having a predetermined volume.
As operative movement of tongue member 37 continues prior to completion of one half of a cycle and a corresponding reciprocation, bottom edge surface 38 is moves to a third position wherein it is disposed outside of chamber 34 after the edge contacting the flexible portion 35 has exerted sufficient pressure upon the flexible portion to bend and deflect it downwardly and out of sealing contact with front wall 31, as shown in FIGURE 5. In this position, the bottom edge surface 38 contains a predetermined metered amount of adhesive which is basically that portion of the adhesive contained within the supply reservoir or cavity 46 which was separated and defined by the portions of the front wall 31, the bottom edge surface, the side Walls 33, and the converging wall 32.
An advantageous feature of this apparatus is that the amount of adhesive separated in the manner described above can be closely controlled and easily controlled in an accurate manner. The principal manner of varying the amount resides in varying the thickness of tongue member 37 which results in a larger cross-sectional area for cavity 46. Alternatively, and perhaps even more expeditiously, the angle of the bottom edge surface 38 may be varied relative to front wall 31 and converging wall 32 to change the volume of a resulting cavity 46 formed during operation.
FIGURE 6 illustrates a modified form of the metering and dispensing device and is a bottom view of the device shown in FIGURE 2. In this embodiment, converging wall 32 has a plurality of flexible portions 50 positioned in spaced relation to each other and separated by a plurality of inflexible integral portions 51 of converging wall 32 which intersect and contact front wall 31 to form a seal. Tongue member 37 has a plurality of spaced slots cut upwardly through the bottom edge surface 38 and corresponding to the integral portions 51. This results in the formation of a plurality of separate tongue member 37 of narrow width which are passed outward of chamber 34 upon movement of piston 31 through the joint between the flexible portions 56 and front wall 31.
In operation, the bottom edge surface 38 of each tongue member 37 carries a predetermined amount of adhesive out from the supply chamber 34. The application of this adhesive to a surface results in an intermittent treated line.
From the above, it can be seen that the apparatus described in several embodiments accomplishes separation of a metered amount of adhesive from a supply contained within a supply reservoir and transfers it to a remote position for application to a web. In accordance with the invention, the tongue member 37 carrying a metered amount of adhesive thereon, may be advanced into a position of interference with the lifted and supported transverse segment of a moving web, whereupon adhesive transfer occurs.
FIGURES 7 and 8 illustrate two alternative methods for handling the metered amount of adhesive after its separation from the parent supply in order that it may be transferred to the desired portion of the surface of a moving paper web. FIGURE 7 contemplates employing with the adhesive metering and dispensing device 21 a separate transfer means which in the embodiment shown comprises a rotatably mounted cylinder 53 positioned between the bottom edge surface 38 of a tongue member 37 of a metering device and the surface of a moving paper web 54 which represents the surface to which adhesive is to be applied. Web 54 is supported in partial wrapping engagement with the surface of a rotatably mounted supported roll 55. Cylinder 53 has a protuberance 55 extending outwardly from its surface which protuberance extends longitudinally from one end of roll 53 to the other. The relationship of transfer roll 53 is such that, upon rotation, protuberance 56 is moved past a position of interference with the outwardly extending bottom surface 38 of tongue member 37 of the metering and dispensing device. Upon contact, the protuberance serves as a transfer bar and wipes the metered amount of ad hesive from the bottom edge surface 38. Upon further rotation, the transfer bar or protuberance 56 contacts the preselected portion of the surface of moving web 56 and applies or transfers a metered amount of adhesive to the web. It can be seen that the movement and timing of contact of the web by transfer bar 56 may be con trolled in a manner whereby it bears some relationship to movement of the web or another work piece, as is understood in the art.
FIGURE 8 illustrates another embodiment of apparatus involving the metering and dispensing device shown in FIGURE 2 for transferring the measured amount of adhesive contained on bottom edge surface 38 to a desired surface. As shown in FIGURE 9, an actuation means such as double action air cylinder 58 is attached to front wall 31 of the housing 30 of a metering and dispensing device 21 and is arranged to advance and withdraw the entire metering and dispensing device 21 to a position where the bottom edge surface 38 of an outwardly extending tongue member 37 containing a metered amount of adhesive thereupon would contact a desired surface such as the surface of a moving paper web 34 at a predetermined time. In a manner similar to that employed in FIGURE 7, a moving paper web 54 could be supported in partial wrapping engagement with a rotatably mounted support roll 55. A valve 59 is arranged to control the operation of double action air cylinder 58 by means of air from line 60 fed through line 61 or line 62. Air cylinder 58 would advance and withdraw the bottom edge surface 38 into contact with the surface of the moving web 54 at a predetermined time whereby accomplishing adhesive transfer.
Latched cut-017 mechanism Referring now to FIGURES 9 and 10, support roll 14 has an elongate slot or opening in the surface thereof cut in a direction substantially parallel to the axis of the roll 14 and forming a cavity in the roll 14 into which a knife 24 and a resilient support member 23 are movably positioned substantially parallel to each other. The knife 24 24 and the support member 23 are carried by holders 65 which are mounted upon a plurality of arms 66 positioned along the length of support roll and fixedly secured by means of a bolt 68 to a rocker shaft 67 passing through and journaled within the ends of the support roll 14 of selective rotation. Holders 65 are advantageously formed of a resilient material such as light gauge spring steel so as to provide a resilient support for the web 11, the usefulness of which will be subsequently pointed out.
An arm 70 is located beyond the end of support roll 14 and is similarly fixedly mounted upon and secured to rocker shaft 67 -by means of a bolt 71. Arm 70 as an extension "72 to which is rotatably attached a cam follower 73. Cam follower 73 rests upon a camming surface 75 formed by a stationary cam 76 which is mounted upon and fixed to stationary shaft 77 which carries journal bearings upon which support roll 14 is rotatably mounted. Spring bias means 78 are located within support roll 14 and adapted to continuously urge arms 66 outwardly in order to project knife 24 and resilient member 23 outwardly through the opening in the surface 13 of the support roll shell 14.
Arm 70 has a hook portion 80 extending downwardly alongside end of support roll 14 and adjacent to but spaced from stationary cam 76. Hook portion 80 is arranged so that, absent from any influencing force, it is caught by the latch end 79 of a latch member 81 pivotably attached by a pin 82 to a rotating end portion of the support roll. The opposite end 84 of latch member 81 is under constant bias pressure toward the axis of support roll 14 by means of a spring 83 disposed between an upstanding projection 85 secured to the end of support roll 14 and end 84. This causes latch end 79 of latch member 81 to be moved radially outwardly from the shaft 77 when not otherwise restrained. When the portion of stationary cam 76 having the largest radius is beneath the cam follower 73, the latch end 79 will exert substantially no retaining force upon hook portion 80 since movement of hook portion 80 is prevented by cam follower 73' upon cam 76. However, when cam follower 73, during revolution of support roll 14, rides upon the portion of stationary cam 76 having a lesser radius, latch end 79 exerts a holding force on hook portion 80 and prevents outward movement of knife member 24 and resilient support member 23 in response to urging by the spring bias means 78 carried within support roll 14.
Provision is made in accordance with the invention to automatically prevent engagement of latch end 79 with hook portion 80 at a predetermined point during the operation of the winding apparatus whereby outward movement of knife 24 and resilient support member 23 is permitted in response to urging by spring bias means 78. Accordingly, a movable dog 36 is positioned in a cutout 87 through stationary cam 76 and operatively attached to a solenoid 88 which is connected electrically to the winder controls (not shown) extension or movement toward the end of roll 14 at predetermined points during the wind- :ing process.
In this manner, the dog 86 is axially advanced into a position of interference with an outwardly dependent portion 89 on the latch end 79 of the rotating latch member 81 so that, as the latch member 81 is carried in revolution by the support roll 14, the upper surface 90 of the depending portion 89 on the latch end 79 thereof collides with the dog 86, causing latch end 79 to be forced inwardly toward axis of stationary shaft 77 at the point where, in normal operation, it had previously engaged hook portion 80 to prevent the forward movement of book portion 80 and upward movement of knife 24 and resilient support member 23. Thus, during the next cycle or revolution of the support roll 14, the knife 24 and the resilient support member 23 are permitted to respond to the path dictated by the shape of the stationary cam 76 upon the cam follower 73 rides since hook portion 80 is not engaged by latch end 79 as long as the dog 86 remains extended toward the end of roll 14.
In accordance with one feature of the invention, it can be seen from the above that the mechanism described provides a new and improved means for controlling the operation of operative members carried in openings within the surface of a rotating drum or cylinder. It will be readily apparent that the mechanism described will have use with a larg Va iety of mechanical equipment, that the stationary cam 76 may be shaped in a variety of ways in order to effect movement of these members at precisely predetermined points or locations on the arc path of the support roll.
FIGURE 11 illustrates the desired shape of a sta= tionary cam 76 used in accordance with the method of the present invention and it will be noticed that the camming surface portion of lesser distance from the axis of stationary shaft and subsequently into a second camming surface portion of even lesser distance from the axis of the stationary shaft. At the first shelf, the knife 24 advanced toward the position where the knife edge is substantially flush with the surface 13 of the support roll 14 while the resilient member 23 advances to a position outwardly spaced from the surface 13 of the support roll 14. This is from 4 inch to about 1 inch outward from the surface 13 of the support roll 14, In this position, as will be seen from a more detailed description of the method of the invention, the web 11 is supported by the resilient support means 23 into a position of interference with the extended tongue 22 of the glue metering and dispensing device 21 so as to receive the application of a metered amount of adhesive in the desired area.
At this point, the cam follower 73 drops into the second depressed camming surface portion of stationary cam '76 and permits movement of the knife 24 to a position outwardly spaced from the surface 13 of the support roll 14 and movement of the resilient support member 23 to a second position more remote from the surface 13 of the support roll 14 than was the first position. Again, as will be described in greater detail subsequently, this movement is arranged to occur at the precise point during the revolution of the support roll 14 at which the knife has moved through the pickup position 19 and the transverse segment having adhesive thereon is adjacent the fresh core on a succeeding mandrel 15. The second position now held by the resilient support means 23 is located such that the support means 23 presses the transverse segment of the web 11 carried thereon into contact with a fresh core and simultaneously the knife blade 24 transversely severs the web 11 to form a tail on the web of the preceding wound roll 16.
above are shown by partial schematic views in FIGURES l2, l3, l4, and 15. Referring to FIGURE 12, the position of the knife 24 and the resilient support means 23 may be seen as the cam follower 73 rides upon the highest portion of the stationary cam '76 or when the latch end 79 of latch member 81 is engaged with the hook portion 80 which forces the knife 24 and the supporting member 23 to hold the same position. FIGURE 13 illustrates the manner in which dog 86 applies a camming action to the latch end 79 of latch member 81 to prevent hooking engagement of end 79 with hook member 86 of arm 70. It will be apparent that this action only occurs upon advancement of dog 86 by the solenoid or other actuating means.
FIGURE 14 illustrates the position of the knife and the resilient support member as the cam follower 73 moves into the first depressed portion or shelf area on stationary cam 76 after the dog 86 has been advanced into an interfering position with the upper surface of depending portion 89 on the latch end 79 of latch member 81. Here it can be seen that the knife 24 lides flush with the surface 13 of support roll 14 and resilient support member 23 holds the web 11 in a position outwardly spaced from the surface 13 of support roll 14, in which position the web 11 contacts the extended tongue 22 of glue metering and dispensing device 21. In this manner, the adhesive carried on the tongue 22 is transferred to the web 11 at the desired location.
Looking now at FIGURE 15, the position of the knife 24 and the resilient support member 23 may be seen after the cam follower 73 has dropped into the second depressed portion or shelf area of stationary cam 76. Here it can be seen that the resilient support 23 has thrust the transverse segment of web 11 into contact with the surface of a fresh core carried by a succeeding mandrel at the pickup position while the knife 24 has substantially simultaneously severed the web 11 in front of the transverse segment to which adhesive was applied. In this manner, the winding of a new roll 16 is commenced.
From the above description, it will be apparent that various modifications can be made in the details of the apparatus described therein without departing from the spirit and scope of the invention. For example, many different means could be employed to lift and support transverse web segments above the surface of the rotating support roll. The description is for purposes of illustration of the invention and is not intended to limit the scope of the invention except as may be required by the claims.
What we claim is:
1. In a continuous winding process, a method for effecting transfer of a moving flexible web running in partial wrapping engagement over a support roll to a Web roll being wound on a first core to a second core to start the winding of another web roll, which comprises lifting and supporting a transverse segment of the web to a first position outwardly spaced from the surface of said support roll, applying adhesive to at least portions of said lifted and supported transverse segment, advancing said transverse segment toward a pickup position, and simultaneously severing said web along a transverse line of severance infront of said transverse segment to form a tail end to the web being wound and an advancing leading end to the web to be wound and urging said transverse segment outwardly to a second position more remote from the surface of said support roll into contact with a fresh rotating core upon which the web is to be wound to commence the winding of a new roll.
2. A method according to claim 1, wherein said lifted and supported segment is substantially parallel with the axis of said support roll.
3. A method according to claim 1, wherein said first position is radially outwardly spaced between about inch and 1 inch from the surface of said support roll.
4. A method according to claim 1, wherein said second position is radially outwardly spaced between about /2 inch and 2 inches from the surface of said support roll.
5. A method according to claim 1, wherein said transverse segment is lifted and supported above the surface of said support roll through an arc path traveled by said support roll of up to about 300 degrees.
6. Apparatus for transferring a moving flexible web to a roll core to start the winding of a web roll while the web is traveling to a roll that is being wound, comprising support means for supporting the web traveling to the roll, a plurality of rotatably mounted roll cores, means for successively moving said rotatably mounted roll cores to a pickup position and to a winding position,
means for lifting and supporting a transverse segment of the web to a first position outwardly spaced from said support means, means for applying adhesive to at least portions of said transverse segment while in said first position, means for severing said web along a transverse line in front of said transverse segment, and means for urging said transverse segment toward a second position more remote from said support means into contact with a fresh rotating roll core upon which the web is to be wound to commence the winding of a new roll.
7. Apparatus according to claim 6, wherein said means for severing and said means for urging are adapted for substantially simultaneous operation.
8. Apparatus according to claim 6, wherein said support means comprise a rotatably-mounted cylindrical shell, and said lifting and supporting means are carried within said shell and disposed beneath the outside surface of said shell, said lifting and supporting means being adapted for outward advancement through at least one opening in the surface of said shell into said first and second positions, and said apparatus includes means actuating said lifting and supporting means.
9. Apparatus according to claim 8, wherein said means actuating said lifting and supporting means comprise a stationary cam, a cam follower operably attached to said lifting and supporting means and latch means allowing said cam follower to contact the camming surface of said stationary cam only during predetermined revolutions of said cylindrical shell.
10. Apparatus according to claim 9, wherein said cam follower is rotatably mounted upon and fixedly connected to a rocker shaft extending transversely through said roll by a rocker arm, said rocker shaft is fixedly connected to said lift and supporting means, said latch means include a latch member biased into hooking engagement with said rocker arm, and said apparatus includes control means for selectively preventing engagement of said latch memher with said rocker arm during predetermined revolutions of said support roll.
11. Apparatus according to claim 10, wherein said latch member is carried in revolution on the end of said support roll, and said control means include a dogging member movable into the path of said latch member to prevent hooking engagement of said rocker arm and means to advance and withdraw said dogging member at preselected times.
References Cited UNITED STATES PATENTS 2,512,900 6/1950 Kwitek 24256.6 2,769,600 11/ 1956 Kwitek et a1. 24256.6 3,128,057 4/ 1964 Barnhart et a1 24256 3,179,348 4/1965 Nystrand et al 24256 WILLIAM S. BURDEN, Primary Examiner.