Method and apparatus for application of adhesive tape to an elongated member

Information

  • Patent Grant
  • 6428646
  • Patent Number
    6,428,646
  • Date Filed
    Wednesday, June 28, 2000
    23 years ago
  • Date Issued
    Tuesday, August 6, 2002
    21 years ago
Abstract
An apparatus and method for applying adhesive transfer tape, including an adhesive tape transfer roll holding an adhesive transfer tape, a roll locking cylinder wherein the roll locking cylinder stops the adhesive tape transfer roll from rolling, stopping the transfer of the adhesive transfer tape, and where the locking cylinder further holds the adhesive transfer tape roll for a predetermined time after the completion of the tape transfer such that internal stresses are dissipated. The apparatus and method may further include a piston that raises the adhesive transfer tape at the same time as the roll locking cylinder stops the adhesive tape transfer roll stops rolling.
Description




BACKGROUND OF THE INVENTION




1. Field of Invention




This invention is directed to applying adhesive tape to an elongated member.




2. Description of Related Art




Elongated members of various materials, such as webs and the like, are produced in bulk and wound on large spools for efficiency during transport. The large spools need to be sectioned into smaller spools for various end uses. When respooling elongated members, adhesive needs to be applied to the beginning and end sections of each portion of the elongated member. The beginning section adhesively attaches the portion of the elongated member to the spool. The end section keeps the portion of the elongated member wound on the spool from unwinding from the spool.




One method of applying adhesive is to form an adhesive transfer tape on a roll. The adhesive transfer tape roll then contacts the elongated member to apply the adhesive transfer tape to specific sections of a portion of the elongated member. The adhesive transfer tape applied to the elongated member is separated from the roll of adhesive transfer tape by tearing the adhesive transfer tape by moving the adhesive transfer tape roll and the elongated member relatively away from each other.




SUMMARY OF THE INVENTION




Known respooling machines have difficulty with accurately applying the adhesive transfer tape and ending the adhesive transfer tape transfer. Known adhesive transfer tape applicators, such as Dynak model #9E1590, do not efficiently transfer the adhesive transfer tape to the elongated member.




For example, on conventional respooling machines, applying the adhesive transfer tape to the elongated member is controlled by a cam rolling along a cam track. The cam track and cam assembly allow the adhesive tape roll to rotate to apply the adhesive tape and locks the adhesive tape roll to stop applying the adhesive tape. The cam track, for example, has two levels and has transitions between the two levels that respectively engage and disengage the roll locking piston. The adhesive tape transfer roll slides along the elongated member between tape applications. The conventional respooling machines do not efficiently control the tape transfer process, causing the adhesive transfer tape to break in the wrong place or to become dislodged from the elongated member.




This invention provides tape transfer systems and methods that lift the adhesive tape transfer roll to a breaking position after applying the adhesive transfer tape to the elongated member to facilitate the adhesive transfer tape being applied to the elongated member from the adhesive transfer tape roll.




This invention separately provides tape transfer systems and methods that hold the adhesive transfer tape in an application position for a period of time to allow internal stresses to be released prior to moving the adhesive transfer tape back to a start position for the next adhesive transfer tape applying operation. The tape transfer systems and methods of this invention permit, for example, various qualities of adhesive transfer tape to be used. This allows users flexibility and improves cost savings when choosing an adhesive transfer tape.




These and other features and advantages of this invention are described in or are apparent from the following detailed description of various exemplary embodiments of the systems and methods according to this invention.











BRIEF DESCRIPTION OF THE DRAWINGS




Various exemplary embodiments of this invention will be described in detail with reference to the following figures wherein:





FIG. 1

is a block diagram of A Prior Art embodiment of an elongated member respooling apparatus;





FIG. 2

is a diagram of the section of the Prior Art elongated member that has adhesive transfer tape applied to it;





FIG. 3

is a block diagram of one exemplary embodiment of a known respooling apparatus;





FIG. 4

is a diagram of a conventional cam and cam track;





FIGS. 5-8

are diagrams illustrating one exemplary embodiment of the process for applying adhesive transfer tape;





FIG. 9

is a block diagram of one exemplary embodiment of a respooling apparatus according to the invention;





FIG. 10

is a diagram of one exemplary embodiment of a cam and cam track of the respooling apparatus shown in

FIG. 9

; and





FIG. 11

is a diagram showing the switch


222


of

FIG. 9

in greater detail.











DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS





FIG. 1

shows a block diagram of A Prior Art embodiment of an elongated member respooling apparatus


10


. The elongated member respooling apparatus


10


includes an initial elongated member roll


20


, a final elongated member roll


60


and an elongated member cutter re-feeder


40


with an adhesive tape transfer roll


50


. Portions of the elongated member


30


are transferred from the initial elongated member roll


20


to the final elongated member roll


60


.




The elongated member cutter re-feed


40


applies adhesive transfer tape from the adhesive tape transfer roll


50


to the elongated member


30


before cutting the current portion of the elongated member


30


from the rest of the elongated member


30


to complete the current final elongated member roll


60


and beginning to feed the next portion of the elongated member


30


to the next elongated member roll


60


. The final elongated member roll


60


is regularly replaced as it fills up. The initial elongated member roll


20


is replaced, for example, one-eighth as many times as is the final elongated member roll


60


.




The initial elongated member roll


20


is first loaded into the elongated member respooling apparatus


10


. A start end of a first portion of the elongated member


30


is withdrawn from the initial elongated member roll


20


and fed through the elongated member cutter re-feeder


40


to respool the first portion of the elongated member


30


from the initial elongated member roll


20


to the final elongated member roll


60


. The elongated member cutter re-feeder


40


then applies a first strip of adhesive transfer tape


52


to the beginning section of the first portion of the elongated member


30


using the adhesive tape transfer roll


50


.




The elongated member


30


is then fed into the final elongated member roll


60


. In particular, the elongated member


30


is advanced until the final elongated member roll


60


is full. The elongated member cutter re-feeder


40


then applies two strips of the adhesive transfer tape


52


and


56


from the adhesive transfer tape roll


50


to the elongated member


30


. This is shown in greater detail in FIG.


2


. The second strip of the adhesive transfer tape


56


keeps the current portion of the elongated member loaded to the current final elongated member roll


60


from unwinding. Another first strip of the adhesive transfer tape


52


attaches the next portion of the elongated member


30


to the next final elongated member roll


60


.




The initial elongated member roll


20


, the final elongated member roll


60


and the elongated member


30


are shown as exemplary embodiments. The elongated member can actually be a substrate of any known or later developed material, such as tape, plastic, cloth or paper. Any substances which needs to be transferred from a first roll to a second roll and fastened to the second roll by an adhesive is suitable for use in the present invention.




Further, the Prior Art embodiment shows one initial elongated member roll


20


and a single final elongated member roll


60


. However, multiple initial elongated member rolls


20


and multiple final elongated member rolls


60


can be used either in sequence or simultaneously where the elongated member cutter re-feeder


40


also slits or joins the elongated member


30


in the travel direction as well as cutting the elongated member


30


when the final elongated member roll


60


is full.





FIG. 2

shows the elongated member


30


of the Prior Art as it travels through the elongated member cutter re-feeder


40


. The portion of the elongated member


30


shown in

FIG. 2

includes the second adhesive tape portion or strip


56


which keeps the current portion of the elongated member


30


from unwinding from the current final elongated member roll


60


and the first adhesive tape portion or strip


52


which attaches the elongated member


30


to the final elongated member roll


60


.




The first adhesive transfer tape portion is begun at start line


54


. The first adhesive tape portion


52


is separated from the second adhesive transfer tape portion


56


by a distance extending between the start line


58


of the second adhesive tape portion


56


and the end line


53


of the first adhesive tape portion


52


. That is, the first adhesive tape portion


52


is broken off of the adhesive transfer tape roll


50


at the end line


53


by applying a tensile force between the first adhesive tape portion


52


and the rest of the adhesive transfer tape


50


. This tensile force causes the adhesive transfer tape to fracture at the end, or break, at the end line


53


.




After the first adhesive tape portion


52


is adhesively attached to the current portion of the elongated member


30


being wound on the current final elongated member roll


60


, the second adhesive tape portion


56


is started at the start line


58


and adhesively attached to the beginning section of the next portion


32


of the elongated member


30


. The second adhesive tape portion


56


is then broken off from the adhesive transfer tape


50


at the end, or break, line


57


by applying a tensile force between the second adhesive tape portion


56


and the rest of the adhesive transfer tape roll


50


. As above, the tensile force causes the adhesive transfer tape


50


to fracture, or break, at the end line


57


.




The elongated member


30


travels in the direction of the arrow A. After the first and second adhesive transfer tape portions


52


and


56


have been applied, the elongated member


30


is cut at a cut line


59


to separate the current portion


32


of the elongated member


30


from the next portion


34


.





FIG. 3

shows a portion of a conventional respooling apparatus


100


. As shown in

FIG. 3

, the conventional elongated member respooling apparatus


100


includes a transfer tape extending apparatus


110


, the adhesive tape roll


50


, a roll locking apparatus


140


and an adhesive tape application controller


120


. The adhesive tape application controller


120


includes a cam track


130


and a switch


122


connected to a cam


126


via a link


124


. The cam


126


travels along the cam track


130


to selectively apply the adhesive tape


50


to the elongated member


30


.




The roll locking apparatus


140


engages with the adhesive tape roll


50


to prevent the adhesive tape roll


50


from rotating. This prevents the adhesive tape from being applied to elongated member


30


. The adhesive tape roll


50


may not directly contact elongated member


30


, but may contact elongated member


30


through a roll extender


51


. The roll extender


51


can be any apparatus for allowing the adhesive tape roll


50


to contact the elongated member


30


while allowing roll locking apparatus


140


to engage the adhesive tape roll. The tape extending apparatus


110


is not connected to the roll locking apparatus


140


and simply engages the adhesive tape roll


50


at the beginning of the application cycle and disengages the adhesive tape roll


50


at the end of the application cycle.




In the conventional respooling apparatus


100


, because the adhesive tape transfer roll


50


quickly lifts upward and retracts as it travels on the cam track


130


, the transfer tape does not have enough surface area of the elongated member


30


to stick against. The lack of enough transfer tape on the elongated member


30


and the sudden pulling on the transfer tape as the adhesive tape transfer roll


50


retracts causes the transfer tape to peel from the elongated member


30


. Further, the short travel length due to the small notched cam track


130


when the tape extending apparatus


110


is pushing the adhesive tape transfer roll


50


down causes the adhesive tape transfer roll


50


to skid across the elongated member


30


. This occurs because too much compression force was exerted by the tape extending apparatus


110


, which caused the adhesive transfer tape roll


50


to lock up. This forces the operator to have to reset the elongated member


30


each time the transfer tape peels. This causes considerable down time since large volumes of elongated member


30


are respooled each day.




The switch


122


is connected to the cam


126


via the link


124


, such that, when the cam


126


and the cam track


130


, move relative to each other the link


128


engages the roll locking apparatus


140


with, or disengages the roll locking apparatus


140


from, the adhesive tape roll


50


, as noted below. It should be appreciated that for ease of understanding only, the following description refers to the cam travelling along a stationary cam track, event though, in a working embodiment, the cam track may move relative to a stationary cam.




For example, the elongated member


30


travels towards final roll


60


and fills up the current final elongated member roll


60


. When the current final elongated member roll


60


is determined to be full, the tape application is initialed process. The tape application process begins by the roll extending apparatus


110


moving the adhesive tape roll


50


into contact with the elongated member


30


.




As shown in Prior Art

FIG. 4

, at the beginning of the tape application cycle, the cam


126


starts traveling along the first tape application portion


133


of the cam track


130


. When the cam


126


reaches the first tape break portion


134


on the cam track


130


, the cam


126


moves up. This upward motion is transferred through the physical link


124


to the switch


122


. The switch


122


then engages an air power transfer link


128


, such that roll locking apparatus


140


engages the adhesive tape roll


50


and stops the adhesive tape roll


50


from rolling and stops adhesive tape roll


50


from applying adhesive tape to the elongated member


30


.




The adhesive tape roll


50


may not directly contact the elongated member


30


, but may contact the elongated member


30


through the roll extender


51


. The roll extender


51


can be any apparatus that allows the adhesive tape roll


50


to contact the elongated member


30


while allowing the roll locking apparatus


140


to engage the adhesive tape roll


50


at a distance from the elongated member


30






The cam


126


then moves along the tape non-application portion


135


that spaces the adhesive tape strip


56


from the adhesive tape strip


52


. Then, when the cam


126


reaches the tape release portion


136


, at the end of the tape non-application portion


135


, the cam


126


disengages the switch


122


via the physical link


124


. The switch


122


then cuts off the air supply to the air power transfer link


128


, such that the roll locking apparatus


140


disengages from the adhesive tape roll


50


. The tape is then applied as the cam


126


travels along a second tape application portion


137


to apply the tape strip


56


. The adhesive tape is applied to the elongated member


30


until the cam


126


reaches the second tape break portion


138


. At the second tape break portion


138


, the cam


126


once again moves up, engaging, via the switch


122


, the roll locking apparatus


140


with the adhesive tape transfer roll


50


to stop the adhesive tape transfer roll


50


from rolling. The process ends when the cam


126


reaches the end of the portion


139


, signaling that the respooling apparatus


100


should be reset.




However, in the conventional respooling apparatus


100


another problem is created, in that the distance between the second adhesive tape portion


56


and the first adhesive tape portion


52


needs to be free of adhesive. As shown in

FIGS. 3 and 4

, in the conventional respooling apparatus


100


, the roll locking apparatus


140


is used to stop the application of the adhesive tape in the portion of the elongated member


30


corresponding to the second tape non-application portion


135


of the cam track


130


. However, engaging the roll locking apparatus


140


at the end of the second adhesive tape portion


56


results in a lack of build-up of stresses within the adhesive tape transfer roll


50


, such that the adhesive tape may fail to break, causing a malfunction. The malfunction may take the form of an improperly or not torn adhesive transfer tape or a dislodged adhesive transfer tape roll


50


. The respooling apparatus


100


must then be shut down and the adhesive transfer roll


50


reset by hand.




The elongated member cutter/re-feeder


40


has been described in conjunction with the cam track


130


. However, any timing means, such as a cable with regular protrusions or a timing circuit, can be used with the respooling apparatus according to this invention.





FIGS. 5-8

are diagrams illustrating one exemplary embodiment of the process for applying the adhesive transfer tape. As shown in

FIG. 5

, the elongated member


30


traveling towards final elongated member roll


60


passes by the adhesive transfer roll


50


and a cutting knife


70


. When a determination has been made that the elongated member


30


has filled up the final elongated member roll


60


, the tape application process begins.





FIG. 6

shows the adhesive transfer tape roll


50


in contact with the elongated member


30


to apply the first adhesive tape portion


52


. The first adhesive tape portion


52


is then broken from the adhesive transfer tape roll


50


when the roll locking apparatus


140


engages the adhesive tape transfer roll


50


. As a result, the adhesive tape portion


52


is torn from the adhesive tape transfer roll


50


.





FIG. 7

shows the elongated member


30


with both of the first and second adhesive tape portions


52


and


56


applied to the elongated member


30


. Both of the first and second adhesive tape portions


52


and


56


have been broken off from the adhesive tape transfer roll


50


and are moving towards final elongated member roll


60


.





FIG. 8

shows the cutting knife


70


cutting the elongated member


30


between the first and second adhesive tape portions


52


and


56


. This ends the adhesive tape transfer process and begins the switch from the current to the next final elongated member roll


60


.




When using this conventional respooling apparatus


10


, it is difficult to accurately judge where the adhesive tape portions


52


and


56


are going to break off from the adhesive tape transfer roll


50


. As the portion


33


of the elongated member


30


between the first and second adhesive tape portions


52


and


56


is small, it is cumbersome and difficult to put any sort of cutting knife (not shown) around the adhesive transfer tape roll


50


to precisely cut the adhesive tape portions


52


and


56


from the adhesive transfer tape roll


50


. Thus, this invention identifies two methods to improve the accuracy and efficiency of the breaking point of the adhesive transfer tape


50


through tension breaking.





FIG. 9

shows a portion of a respooling apparatus


200


according to this invention. As in

FIG. 3

, the conventional elongated member respooling apparatus


200


includes a roll extending apparatus


210


, the adhesive tape roll


50


, the roll locking apparatus


140


and an adhesive tape application controller


220


. The adhesive tape application controller


220


includes an improved cam track


230


and or an improved switch


222


connected to a cam


226


via a link


224


. The cam


226


travels along the cam track


230


to selectively apply the adhesive transfer tape roll


50


to the elongated member


30


.




The roll locking apparatus


140


engages with the adhesive tape transfer roll


50


to prevent the adhesive tape transfer roll


50


from rotating. This prevents the adhesive tape from being applied to the elongated member


30


. The roll extending apparatus


210


is connected to the roll locking apparatus


140


through the links


229


and


228


and the switch


222


. The roll extending apparatus


210


engages the adhesive tape transfer roll


50


at the beginning and end of the application cycle. In contrast to the conventional respooling apparatus


100


, the respooling apparatus


200


also moves the adhesive tape roll


50


to a cutting position at the same time the roll locking apparatus


140


engages and disengages the adhesive tape roll


50


at the end of each application of the first and second tape strips


52


and


56


.




The switch


222


is connected to the cam


226


via the link


224


and to the roll extending apparatus


210


via the link


229


such that when the cam


226


travels along the cam track


230


, the link


228


engages or disengages the roll locking apparatus


140


and link


229


engages or disengages the roll extending apparatus


210


.




For example, as the elongated member


30


traveling towards the current final roll


60


and fills up the current final elongated member roll


60


and initiates the tape application process. The tape application process begins by the roll extending apparatus


210


moving the adhesive tape transfer roll


50


into contact with the elongated member


30


.




As shown in

FIG. 10

, at the beginning of the tape application cycle, the cam


226


starts traveling along the first tape application portion


233


of the cam track


230


. When the cam


226


reaches the first tape break portion


234


, at the end of the first tape application portion


233


of the cam track


230


, the cam


226


moves up. This upward motion is transferred through the physical link


224


to the switch


222


. The switch


222


then engages the air power transfer links


228


and


229


such that roll locking apparatus


140


engages the adhesive tape transfer roll


50


and stops the adhesive tape transfer roll


50


from rolling, while at the same time, the tape extending apparatus


210


lifts the adhesive tape transfer roll


50


from contact with the elongated member


30


.




Then, when the cam


226


reaches the tape release portion


236


, the cam


226


disengages the switch


222


via the physical link


224


. The switch


222


then cuts off the air supply to the air power transfer links


228


and


229


, such that the roll locking apparatus


140


disengages from the adhesive tape roll


50


, while the tape extending apparatus


210


places the adhesive tape transfer roll


50


back into contact with the elongated member


30


. The tape is then applied as the cam


226


travels along the second tape application portion


237


until the cam


226


reaches the second tape break portion


238


.




At the second tape break portion


238


, the cam


226


once again moves up, engages via the switch


222


, causing the roll locking apparatus


140


to stop the adhesive tape transfer roll


50


and the tape extending apparatus


210


to lift the adhesive tape transfer roll


50


from the elongated member


30


. The cam


226


then travels along a second tape non-application portion


239


, including an extended portion


239




a


, until all internal stresses in the adhesive tape transfer roll


50


have equalized. The process ends when the cam


226


reaches the end of the second portion


239




a


, signaling that the respooling apparatus


200


should be reset.





FIG. 11

shows one exemplary embodiment of the switch


222


in greater detail. As shown in

FIG. 11

, the switch


222


includes a switch element


250


, an air dispersion device


260


, a common vent


270


, and air pressure transfer links


254


,


229


and


228


. The switch


222


is controlled through the physical link


224


which is attached to the switch element


250


.




As noted above, when the cam


226


moves downward, the movement is communicated through the physical link


224


. The link


224


controls the switch element


250


to remove the air force from the air pressure transfer links


229


and


228


. The switch element


250


can be the known device part number ARO 202C. The switch


250


removes the power from the air pressure transfer links


229


and


229


by removing the pressure from the air pressure transfer link


254


. The air pressure transfer link


254


is connected to the air dispersion device


260


. The air dispersion device


260


can be the known device part number ARO 5030-07 that includes one input port and two output ports.




When the switch


250


and the air dispersion device


260


remove the air pressure from the air pressure transfer links


254


,


229


, and


228


the air may be released through the common vent


270


.




While air pressure transfer links


128


,


228


,


229


and


254


are discussed in terms of air power supply systems, other combinations are possible. For example, air pressure transfer links


128


,


228


,


229


and


254


can be physical, hydraulic or electrical links. In addition, physical link


124


can be an electrical, hydraulic, wireless or air pressure link. In general, the links described herein can be any known or later developed connection system or structure for connecting the described components.




Thus this exemplary embodiment increases the amount of surface area the transfer tape comes into contact with as it begins to break from the elongated member


30


. In this embodiment, the cam track


230


was modified at the end of its travel length


238


. This allows the adhesive transfer tape roll


50


to travel over a longer distance as it is lifting to break the transfer tape so that more tearing force is applied.




In another exemplary embodiment, to have more of a pulling upward force applied to the elongated member


30


, a 3-way spool valve was inserted below the air cylinder to control the amount of air going to the air cylinder as the switch


222


. A roll contact switch was used as the switch element


250


to come in contact with the cam


223


to control when air would be applied to the tape extending apparatus


210


. When the cam


223


was rolling along the lower notched level of the cam track


230


, the cam


223


caused the spool valve to release air from the tape extending apparatus


210


which caused the spring above the tape extending apparatus


210


to force the tape extending apparatus


210


down. Using a double notched cam track


230


allows for the adhesive tape transfer roll


50


to lower onto the elongated member twice so that the transfer tape could be applied to a longer surface area of the elongated member


30


with more pulling force on the transfer tape.




This helps cause a sharper and cleaner adhesive tape breakage when the tape extending apparatus


210


lifts upward. The 3-way spool valves and roll contact switches were mounted on all the transfer tape application points when the tape extending apparatus


210


lifted upward. The 3-way spool valves and roll contact switches were mounted on all the taper devices on the exemplary Dynak machine. Different qualities of transfer tape were used including some tapes that had caused problems previously because of poor adhesive quality. Testing showed that the respooling apparatus


200


according to this invention was able to put on different qualities of transfer tape onto the adhesive transfer tape rolls with no problems of the transfer tape peeling back from the elongated member as the tape extending apparatus


210


retracts.




While this invention has been described in conjunction with specific embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. Accordingly, preferred embodiments in the invention as set forth herein are intended to be illustrative, not limiting. Various changes can be made without departing from the spirit and scope of the invention.



Claims
  • 1. A method of applying adhesive transfer tape to an elongated member using an adhesive transfer tape apparatus comprising: an adhesive tape transfer roll holding an adhesive transfer tape; a timing device; a piston attached to the adhesive transfer tape roll that positions the transfer tape into and out of contact with the elongated member; a roll locking cylinder that engages and disengages the adhesive tape transfer roll to selectively stop rotation of the adhesive tape transfer roll when engaged and allow rotation of the adhesive tape transfer roll when disengaged; and a switch that communicates with both the piston and the roll locking cylinder to control operation according to output from the timing device, the method comprising:moving the piston at a first timing to initially contact the transfer tape with the elongated member while the roll locking cylinder is disengaged to apply a first strip of adhesive tape to the elongated member; controlling the switch at a second timing to engage the roll locking cylinder with the adhesive tape transfer roll to stop rotation of the transfer tape and at the same time control lifting of the transfer tape out of contact with the elongated member by retraction of the piston to break the first strip of adhesive tape; controlling the switch at a third timing to disengage the roll locking cylinder from the adhesive tape transfer roll to allow rotation of the transfer tape and move the piston to push the transfer tape back into contact with the elongated member to apply a second strip of adhesive tape to the elongated member; and controlling the switch at a fourth timing to reengage the roll locking cylinder with the adhesive tape transfer roll to stop rotation of the transfer tape and at the same time moving the piston to lift the transfer tape out of contact with the elongated member to break the second strip of adhesive tape.
  • 2. The method of claim 1, further comprising:waiting a fifth timing after the fourth timing that allows release of internal stresses within the adhesive transfer roll to equalize before resetting the adhesive transfer roll to a start position to initiate a new taping sequence.
  • 3. An apparatus for applying adhesive transfer tape to an elongated member, comprising:an adhesive tape transfer roll holding an adhesive transfer tape; a timing device; a piston attached to the adhesive transfer tape roll that positions the transfer tape into and out of contact with the elongated member; a roll locking cylinder that engages and disengages the adhesive tape transfer roll to selectively stop rotation of the adhesive tape transfer roll when engaged and allow rotation of the adhesive tape transfer roll when disengaged; and a switch that communicates with both the piston and the roll locking cylinder to control operation according to output from the timing device, wherein at a first timing the piston initially moves the transfer tape into contact with the elongated member while the roll locking cylinder is disengaged to apply a first strip of adhesive tape to the elongated member, at a second timing the switch controls the roll locking cylinder to engage the adhesive tape transfer roll to stop rotation of the transfer tape at the same time the piston lifts the transfer tape out of contact with the elongated member to break the first strip of adhesive tape, at a third timing the switch controls the roll locking cylinder to disengage the adhesive tape transfer roll to allow rotation of the transfer tape and the piston moves the transfer tape back into contact with the elongated member to apply a second strip of adhesive tape to the elongated member, at a fourth timing the switch controls the roll locking cylinder to engage the adhesive tape transfer roll to stop rotation of the transfer tape at the same time the piston lifts the transfer tape out of contact with the elongated member to break the second strip of adhesive tape.
  • 4. The apparatus of claim 3, wherein the timing device provides a fifth timing at a time interval after the fourth timing that allows release of internal stresses within the adhesive transfer roll have equalized before the adhesive transfer roll is reset to a start position.
  • 5. The apparatus of claim 3, wherein a cam track and cam form the timing device.
  • 6. The apparatus of claim 3, wherein the switch communicates with the roll locking cylinder and the piston through air pressure transfer links and switching occurs through change in air pressure through the air pressure transfer links.
  • 7. The apparatus of claim 6, wherein the switch is a 3-way spool valve.
US Referenced Citations (6)
Number Name Date Kind
4295916 Stevens Oct 1981 A
4321103 Lindstrom et al. Mar 1982 A
4385959 Goguen May 1983 A
4591402 Evans et al. May 1986 A
4980011 Gruber et al. Dec 1990 A
5431767 Koza et al. Jul 1995 A