Method for cutting and spooling a paper web

Abstract

A method of cutting and spooling a paper web by providing a transfer tape having a cover flap joined longitudinally to a carrier member along the trailing edge such that the cover flap opens in a hinged manner to expose a pressure sensitive adhesive layer on the carrier member for adherence to an advancing paper web for severance and transfer of the paper web onto an empty spool. The transfer tape is adhered to an empty spool. The cover flap is opened by air resistance encountered during rotation of the spool, by providing an adhesive tab member on the exterior of the cover flap that initiates opening upon adhesion of the tab member to the reel drum, or by providing a blast of pressurized air against the leading edge of the transfer tape.

Description

BACKGROUND OF THE INVENTION

This invention relates generally to the field of devices, apparatuses and methods of effecting high speed severing and transfer of a rapidly advancing paper web from one spool onto an empty spool, and more particularly where such an operation is performed utilizing a transfer or turn-up tape. More particularly, the invention relates to an improved transfer tape and paper web severing/transfer method, wherein the transfer tape is the effecting means for severing, transferring and securing the paper web onto an empty spool.

Modern paper manufacture is typically performed by producing continuous sheets of paper having widths of up to 330 inches in some cases, referred to as paper webs, which are wound onto spools for subsequent processing, storage, transfer or the like. The spooling operation for the paper web occurs at high speeds, in some cases as high as 8000 feet per minute, and in order to maximize production by minimizing downtime it is desirable to sever and transfer the web from a full spool to an empty spool without stopping or slowing movement of the web. Methods and apparatuses for accomplishing this severing and transfer utilizing what is known as a transfer or turn-up tape have long been known. An early example of such a system is shown in U.S. Pat. No. 2,461,246 to Weyenberg, issued in 1949. Other examples are shown in my U.S. Pat. Nos. 4,659,029, 4,757,950, 4,783,018, 5,046,675, 5,453,141, 5,637,170, and 5,954,290. Examples of different types of transfer systems are shown in my U.S. Pat. Nos. 4,467,719 and 5,810,279.

The transfer tape utilized in severing and transferring the paper web has at least one adhesive side, preferably comprised of a pressure sensitive adhesive (PSA), that contacts and adheres to the web, such that in certain systems the web is transversely severed as the tape is brought onto the empty spool. In other systems, the transfer tape is already adhered to the empty spool, in which case the web adheres to the tape as the spool rotates, the web severing as the travel direction of the tape pulls away from the direction of travel of the paper web.

The high speed transfer of lightweight paper webs, such as newsprint or tissue paper, is more difficult to accomplish due to the weaker structure of the paper. In addition, where adhesive transfer tapes are used, the exposed adhesive side of the transfer tape is often contaminated with airborne dust, floating paper fibers and other debris, such that the adhesion is weakened or even blinded completely, which can result in a failed transfer.

It is an object of this invention to provide an improved transfer tape and an improved method of severing and transferring a continuous paper web from one spool to another spool, such as are especially useful in transferring lightweight papers such as tissue or newsprint, wherein the transfer tape is improved by providing a longitudinally extensive cover flap member that protects a pressure sensitive adhesive layer on the tape by preventing contamination from airborne dust, paper fibers or other debris. It is a further object to provide such a transfer tape and method of utilizing tape wherein the cover flap is self-opening as a result of the air resistance encountered due to rotation of the empty spool. It is a further object to provide additional embodiments of the transfer tape wherein an adhesive tab member is provided on the exterior of the cover flap to initiate the opening of the flap. It is a further object to provide additional embodiments for the method wherein pressurized jets of air are utilized to open the cover flap to expose the adhesive on the tape. These and other objects not expressly set forth in this paragraph will be addressed in the disclosure to follow.

SUMMARY OF THE INVENTION

The invention is a new structure for a paper web transfer tape used in web spooling, transfer or turn-up operations where a continuously and rapidly advancing paper web being wound onto a first spool is cut and transferred onto a second spool without stopping or slowing the advancing paper web. The transfer tape comprises an elongated and thin carrier member having a pressure sensitive adhesive (PSA) coating applied to both sides. The PSA coating on the first side is temporarily covered by a cover flap comprising a flap member composed of paper or the like that is provided with a release layer coating of silicon or the like such that the cover flap does not adhere to the PSA coating. The cover flap is adhered to the carrier member along or adjacent a longitudinal edge of the carrier member such that the cover flap easily opens in a hinged manner to expose the PSA coating. The cover flap prevents adhesion of environmental dust, paper fibers and other airborne debris which will diminish the adhesive strength of the PSA coating, possibly to the point where the tape will not adhere to the paper web. An alternative construction for the transfer tape provides a small adhesive tab member disposed on the outer surface of the cover flap, with the adhesive tab member used to initiate the opening of the cover flap to expose the PSA layer.

The transfer tape is adhered to an empty spool such that free or leading edge of the cover flap faces in the direction of rotation of the spool, such that air pressure encountered by rotation of the tape causes the cover flap to fold or pivot backward, thus exposing the PSA coating just prior to its coming in contact with the advancing paper web. As the tape adheres to the paper web, the paper web is torn transversely and is transferred to the new spool. In a further embodiment of the methodology, air pressure jets or nozzles are disposed to initiate the opening of the cover flap to expose the PSA layer immediately prior to contact with the paper web and to initiate the transverse tear in the paper web.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a portion of the preferred embodiment of the transfer tape of the invention.

FIG. 2 is a perspective view of an alternative embodiment, wherein an adhesive tab member is provided on the cover flap of the transfer tape of FIG. 1.

FIG. 3 is a perspective view of a portion of an alternative embodiment of the transfer tape, wherein the cover flap is not folded.

FIG. 4 is a perspective view of an alternative embodiment, wherein an adhesive tab member is provided on the cover flap of the transfer tape of FIG. 3.

FIG. 5 is a perspective view of an alternative embodiment, wherein the cover flap is attached to the underside of the carrier member

FIG. 6 is a perspective view of an alternative embodiment, wherein the carrier member of the transfer tape is longitudinally embossed.

FIG. 7 is an illustration of the transfer tape in use in the web transfer operation.

FIG. 8 is a side view of the web transfer operation, showing the addition of high pressure air jets to open the cover flap of the transfer tape and to initiate severing of the web.

FIG. 9 is a perspective view of the web transfer operation, wherein high pressure water jets are used to cut the paper web longitudinally.

DETAILED DESCRIPTION OF THE INVENTION

With reference to the drawings, the invention will now be described with regard for the best mode and the preferred embodiment. In general, the invention is a device or apparatus for cutting, transferring and spooling a rapidly traveling web of paper, the apparatus comprising a transfer tape of novel structure, and the method or process utilizing such transfer tape whereby a rapidly traveling paper web being wound onto a first spool is cut and directed onto a second spool.

The transfer tape 10, various embodiments of which are illustrated in FIGS. 1 through 6 (wherein the representative layers are not drawn to scale but are provided for illustrative purposes), is a longitudinally extended member having a ribbon-like configuration, such that it is relatively thin with a relatively small width, with representative dimensions being for example approximately one inch in width and less than approximately one mm in thickness. It is understood that particular dimensions will vary dependent on the particular spooling system or application parameters. As shown in FIG. 1, the transfer tape 10 comprises a carrier member 11 having a first pressure sensitive adhesive (PSA) layer 12 applied to or coated on a first side of said carrier member 11 and a second pressure sensitive adhesive layer 13 applied to or coated on a second side of said carrier member 11. The PSA layers 12 and 13 preferably cover the full extent of both sides of the carrier member 11, but may also be applied intermittently in localized regions, in longitudinal stripes, etc. The carrier member 11 provides strength and structural integrity to the transfer tape 10 and is composed of any suitable material known in the industry capable of receiving and retaining an adhesive. Carrier members 11 composed of paper are well known in the industry. Preferably, the carrier member 11 and other components of the transfer tape 10 are composed of a paper or similar material that is recyclable or re-pulpable. The PSA layers 12 and 13 are composed of any such adhesive suitable for application to and retention by the carrier member 11 that is also suitable for adhesion to the paper web being spooled. A removable release liner member 14 is temporarily applied to cover the second PSA layer 13 on the carrier member 11. The release liner member 14 is composed of a material or incorporates a release material, such as for example a silicon coating or impregnation, such that the release liner member 14 adheres in only a limited manner to the carrier member 11 in order to prevent undesired adhesion of the second PSA layer 13 to other objects prior to use, but which is easily removed therefrom when required.

A cover flap 20 comprising a flap member 15 composed of a kraft paper or similar material that will adhere to the first PSA layer 12 is provided, with the interior side of the flap member 15 being provided with a release coating or layer 16, composed for example of a silicon coating or the like, characterized in that the interior side of the flap member 15 does not adhere to the first PSA layer 12 on the carrier member 11. The flap member 15 is of greater overall width than the carrier member 11, such as for example approximately 1.5 inches for a carrier member 11 having a width of approximately one inch. The flap member 15 is folded longitudinally to create a short attachment flange member 17, such as for example approximately 0.25 inches in width for a flap member 15 width of approximately 1.5 inches, and is folded such that the flap release layer 16 is folded upon itself. The flap member 15 is then attached to the carrier member 11 by adhering the flap member 15 along one longitudinal edge of the first PSA layer 12 on the carrier member 11, with the remainder of the flap member 15 extending laterally across the first PSA layer 12 of the carrier member 11 and slightly beyond—approximately 0.25 inches for the representative dimensions given above. The flap release layer 16 prevents the interior side of the flap member 15 from adhering to the first PSA later 12, and for this purpose must be correspondingly disposed opposite to all of the exposed first PSA layer 12. The longitudinal edge of the transfer tape 10 to which the flap member 15 is joined defines the trailing edge 18, with the opposite longitudinal edge of the transfer tape 10 being the leading edge 19. The cover flap 20 is thus able to open in a hinged manner to expose the first PSA layer 12.

With this construction, the first PSA layer 12 of the transfer tape 10 is covered by the cover flap 20 such that the first PSA layer 12 is protected from environmental dust, floating paper fibers and other atmospheric debris prior to use. In this manner, environmental dust, fibers and debris will not detrimentally reduce the adhesion properties of the first PSA layer 12. As explained in detail below, the cover flap 20 is opened to expose the first PSA layer 12 only immediately prior to the cutting and transfer operation, thus insuring that sufficient adhesive surface area remains for the transfer tape 10 to adhere to the paper web being transferred.

An alternative embodiment for the transfer tape 10 is shown in FIG. 3, wherein the transfer tape 10 is composed of a carrier member 11, a first PSA layer 12, a second PSA layer 13 and a release liner member 13 as described above. The cover flap 20 is again comprised of a flap member 15 composed of a kraft paper or similar material that will adhere to the first PSA layer 12. The flap member 15 is slightly wider than the carrier member 11 such that it will extend slightly beyond the leading edge 19. For example, for a carrier member 11 having a width of approximately one inch, the flap member 15 may be 1.25 inches in width. The interior side of the flap member 15 is partially coated with a flap release layer 16 comprising a material that prevents the flap member 15 from adhering to the first PSA layer 12, such as for example a silicon coating. The flap member 15 is coated such that all or a suitable intermittent portions of the strip or edge of the interior side of flap member 15 along the trailing edge 18 is uncoated, such that this uncoated strip portion will adhere directly to the first PSA layer 12 of the carrier member 11. In this construction, the flap member 15 is not in a folded configuration. For example, the flap release layer 16 may be applied in an approximately one inch width, leaving an uncoated strip of approximately of 0.25 inches on the 1.25 inch flap member 15 to adhere to the carrier member 11.

In FIGS. 2 and 4, alternative embodiments are illustrated wherein in each structure the cover flap 20 is provided with an adhesive tab member 30 of relatively short longitudinal and width dimensions in comparison to the transfer tape 10. FIG. 2 shows the tab member 30 as applied to the transfer tape 10 of FIG. 1, and FIG. 4 shows the tab member 30 as applied to the transfer tape of FIG. 3. The tab member 30 is disposed at or adjacent the corner of the leading edge 19 of the transfer tape 10 on the flap member 15. The tab member 30 comprises a tab carrier member 31 composed of a paper or similar material able to retain or absorb a PSA coating, such that a first PSA layer 32 and a second PSA layer 33 are applied to opposing sides of the tab carrier member 31. The second PSA layer 33 adheres the tab member 30 to the exterior side of the flap member 15. A removable release liner member 34 composed of a material or a coating that allows slight adhesion to the first PSA layer 32 is positioned on the external side of the tab carrier member 31. The tab release liner member 34 is removed prior to use of the transfer tape 10. The adhesive tab member 30 is used to assist in opening the cover flap 20 when heavier grade papers are being spooled by bringing the tab member 30 into contact with the reel drum beyond the edge of the advancing paper web 50.

FIG. 5 illustrates another alternative embodiment for the transfer tape 10. In this embodiment, the cover flap 20 adheres to the paper web 50 being transferred. The cover flap 20 comprises the flap member 15 and a first PSA layer 12, which is applied to the underside or interior side of flap member 15. A flap release layer 16 is disposed on the upper side or interior of carrier member 11, such that it is disposed between the carrier member 11 and the flap member 15. The cover flap 20 folds or wraps around the trailing edge 18, such that a portion of the first PSA layer 12 adheres the flap member 15 to the carrier member 11. The carrier member 11 is provided on the underside or exterior with a second PSA layer 13 which is covered by a removable release liner member 14. The presence of flap release layer 16 allows the cover flap 20 to be easily opened to expose the first PSA layer 12 to the paper web 50.

FIG. 6 illustrates another alternative embodiment of the transfer tape 10. In this embodiment, the layers of the transfer tape correspond to the layers as shown in FIG. 1, but the assembly formed by the combination of the first PSA layer 12, the carrier member 11, the second PSA layer 13 and the release liner member 14 are longitudinally embossed to create a series of alternating ridges 41 and valleys 42. This configuration increases the structural rigidity of the transfer tape 10, while retaining sufficient adhesive contact area for the first and second PSA layers 12 and 13 to perform as required in the web transfer operation. The increased thickness of the transfer tape 10 and the compressibility of the transfer tape 10 increases the efficiency of the interference fit within the nip during the transfer operation.

In paper web spooling, cutting, turn-up and transfer operations, a rapidly moving paper web 50 passes over a reel drum 51 of relatively large diameter in comparison to the spools 52 upon which the paper web 50 is wound to create a paper reel 53. When a first spool 52 is fully loaded, the paper web 50 must be cut and directed onto a second, empty spool 52, which is mounted onto a primary arm 54 that positions the second spool 52 in the location now vacated by the loaded first spool 52. The cutting and transfer operation is performed by use of a transfer tape having an adhesive layer on both sides, such that the tape itself cuts the paper web 50, adheres to the newly created leading edge of the paper web 50 and secures the paper web 50 to the new spool 52. Such operations and techniques are well known in the industry.

This operation is illustrated in FIGS. 7, 8 and 9. The release liner member 14 is first removed to expose the second PSA adhesive layer 13 and the transfer tape 10 is applied generally longitudinally to the empty spool 52 mounted on the primary arm 54. The transfer tape 10 may be applied in a straight or helical manner to the empty spool 52. The spool 52 rotates in the direction opposite to the rotation direction of the reel drum 51, so that where the reel drum 51 is seen as rotating in a clockwise manner as shown in the drawings, the spool 52 will be rotating in a counter-clockwise manner. The transfer tape 10 is applied to the spool 52 such that the leading edge 19 of the transfer tape 10 is in the forward direction of rotation on the spool 52. Because the cover flap 20 is prevented from adhering to the first PSA layer 12, the air pressure encountered due to the rapid forward motion of the transfer tape 10 causes the cover flap 20 to open and bend backward from the first PSA layer 12, completely exposing first PSA layer 12 as the spool 52 rotates and is brought into contact with the advancing paper web 50. The now exposed first PSA layer 12 contacts and adheres to the paper web 50. This adhesion causes the paper web 50 to tear and transfer onto the spool 52, such that the paper web 50 is now being spooled onto an empty spool 52. Because the cover flap 20 has covered the first PSA layer 12 until the time of actual use, the adhesive properties of the transfer tape 10 have not been denigrated by environmental dust, floating paper fibers and other atmospheric debris.

In an alternative method, where the transfer tape 10 is constructed as shown in FIGS. 2 and 4 with an adhesive tab member 30, after applying the tape 10 to the empty spool 52 the opening of the cover flap 10 is initiated by removing the tab release liner member 34 to expose the second PSA layer 33, such that on a first revolution the tab member 30 adheres briefly to the reel drum 51, the tab member 30 being positioned on the spool 52 beyond the edge of the paper web 50. The continued rotation causes the cover flap 20 to then fully open such that the first PSA layer 12 contacts and adheres to the paper web 50, tearing it and transferring it to the spool 52. This embodiment is useful where the rotation speed of the spool 52 is not sufficient by itself to open the cover flap 20.

In a further alternative method, the opening of the cover flap 20 and tearing of the paper web 50 after the transfer tape 10 has been adhered to the paper web 50 may be assisted by providing pressurized air directed through nozzles or jets of pressurized air means 55 and 56, as shown in FIG. 8. A blast of pressurized air from pressurized air means 55 is directed against the leading edge 19 of the cover flap 20 immediately prior to the transfer tape 10 first contacting the paper web, causing the cover flap 20 to open to expose the first PSA layer 12. This application of forced air from pressurized air means 55 is useful in circumstances where the rotation speed of the spool 52 is not sufficient by itself to expose the first PSA layer 12. Furthermore, where the paper web 50 is relatively heavy, pressurized air means 56 may be disposed on the edge of the paper web 50 at the location where the transfer tape 10 adheres to the spool 52 and the paper web 50 begins to rotate away from the reel drum 51, such that a pressurized air blast from pressurized air means 56 initiates the tear in the paper web 50, such that the adhesion to the transfer tape 10 propagates the tear across the full width of the paper web 50.

In still another alternative methodology, as shown in FIG. 10, the transfer tape 10 is applied to the spool 52 in segments rather than in a continuous length, where the discontinuities of the adjacent tape segments correspond to longitudinal cuts made in the paper web 50 by high pressure water jets 57 or the like prior to reaching the reel drum 51. In this manner, each of the longitudinal segments of the paper 50 can now be simultaneously transferred to the spool 52 as previously discussed.

It is contemplated that equivalents and substitutions to certain elements and features set forth above may be obvious to those skilled in the art, and thus the true scope and definition of the invention is to be as set forth in the following claims.

Claims

1. A method of severing and transferring an advancing paper web onto an empty spool comprising the steps of: providing a transfer tape having an elongated carrier member having a first side, a second side, a longitudinal leading edge and a longitudinal trailing edge, a first adhesive layer disposed on said first side of said carrier member, and a second adhesive layer disposed on said second side of said carrier member; and a cover flap attached to said carrier member along said longitudinal trailing edge of said carrier member and disposed adjacent said first adhesive layer, wherein said cover flap opens in a hinged manner to expose said first adhesive layer;adhering said second adhesive layer of said transfer tape to an empty spool such that said leading edge faces the direction of rotation of said empty spool;rotating said empty spool such that said cover flap opens to expose said first layer of adhesive; andbringing said rotating empty spool into contact with an advancing paper web, such that said first adhesive layer of said transfer tape adheres to said paper web, wherein said paper web is severed as rotation of said empty spool continues after contact and said paper web is transferred to said empty spool.

2. The method of claim 1, further comprising the step of: opening said cover flap of said transfer tape by directing a blast of pressurized air against said leading edge of said transfer tape during rotation of said empty spool.

3. The method of claim 2, further comprising the step of: severing said paper web after said transfer tape has adhered to said paper web by directing a blast of pressurized air against said paper web.

4. The method of claim 1, further comprising the step of: severing said paper web after said transfer tape has adhered to said paper web by directing a blast of pressurized air against said paper web.

5. The method of claim 1, further comprising the step of cutting said paper web longitudinally to create plural strips of paper web; and wherein said steps of providing and adhering said transfer tape to said empty spool is accomplished by adhering plural segments of said transfer tape to said empty spool such that each segment of said transfer tape corresponds to one said strip of said paper web.

6. The method of claim 1, further comprising the steps of: positioning an adhesive tab member on said cover flap of said transfer tape; andcontacting said adhesive tab member to a reel drum during said rotation of said empty spool to assist in opening said cover flap of said transfer tape.

7. The method of claim 1, further comprising the steps of: positioning an adhesive tab member on said cover flap of said transfer tape; andcontacting said adhesive tab member to a reel drum during said rotation of said empty spool to assist in opening said cover flap of said transfer tape.

8. A method of severing and transferring an advancing paper web onto an empty spool comprising the steps of: an elongated carrier member having an interior side, an exterior side, a longitudinal leading edge and a longitudinal trailing edge; a cover flap attached to said carrier member along said longitudinal trailing edge of said carrier member, said cover flap comprising a flap member and a first adhesive layer; a second adhesive layer disposed on said exterior side of said carrier member; and a release layer disposed on said interior side of said carrier member that does not adhere to said first adhesive layer; wherein said cover flap opens in a hinged manner to expose said first adhesive layer;adhering said second adhesive layer of said transfer tape to an empty spool such that said leading edge faces the direction of rotation of said empty spool;rotating said empty spool such that said cover flap opens to expose said first layer of adhesive; andbringing said rotating empty spool into contact with an advancing paper web, such that said first adhesive layer of said transfer tape adheres to said paper web, wherein said paper web is severed as rotation of said empty spool continues after contact and said paper web is transferred to said empty spool.

9. The method of claim 8, further comprising the step of: opening said cover flap of said transfer tape by directing a blast of pressurized air against said leading edge of said transfer tape during rotation of said empty spool.

10. The method of claim 9, further comprising the step of: severing said paper web after said transfer tape has adhered to said paper web by directing a blast of pressurized air against said paper web.

11. The method of claim 8, further comprising the step of: severing said paper web after said transfer tape has adhered to said paper web by directing a blast of pressurized air against said paper web.

12. The method of claim 8, further comprising the step of cutting said paper web longitudinally to create plural strips of paper web; and wherein said steps of providing and adhering said transfer tape to said empty spool is accomplished by adhering plural segments of said transfer tape to said empty spool such that each segment of said transfer tape corresponds to one said strip of said paper web.

13. The method of claim 8, further comprising the steps of: positioning an adhesive tab member on said cover flap of said transfer tape; andcontacting said adhesive tab member to a said reel drum during said rotation of said empty spool to assist in opening said cover flap of said transfer tape.

14. A method of severing and transferring an advancing paper web onto an empty spool comprising the steps of: providing a transfer tape having an elongated carrier member having first and second adhesive layers, said first adhesive layer covered by a cover flap permanently attached to said carrier member, wherein said cover flap opens in a hinged manner to expose said first adhesive layer;adhering said second adhesive layer of said transfer tape to an empty spool;rotating said empty spool to open said cover flap to expose said first adhesive layer; andbringing said rotating empty spool into contact with an advancing paper web, such that said first adhesive layer of said cover flap adheres to said paper web, wherein said paper web is severed as rotation of said empty spool continues after contact and said paper web is transferred to said empty spool.

15. The method of claim 14, further comprising the step of: opening said cover flap of said transfer tape by directing a blast of pressurized air against said cover flap during rotation of said empty spool.

16. The method of claim 15, further comprising the step of: severing said paper web after said cover flap of said transfer tape has adhered to said paper web by directing a blast of pressurized air against said paper web.

17. The method of claim 14, further comprising the step of: severing said paper web after said cover flap of said transfer tape has adhered to said paper web by directing a blast of pressurized air against said paper web.

18. The method of claim 14, further comprising the step of cutting said paper web longitudinally to create plural strips of paper web; and wherein said steps of providing and adhering said cover flap of said transfer tape to said empty spool is accomplished by adhering plural segments of said transfer tape to said empty spool such that each segment of said transfer tape corresponds to one said strip of said paper web.