US3663339A

US3663339A - Method and apparatus for securing superimposed windings of a coil

Info

Publication number: US3663339A
Application number: US33000A
Authority: US
Inventors: Helmut Herrmann
Original assignee: Metalloxyd GmbH
Current assignee: Metalloxyd GmbH
Priority date: 1969-07-11
Filing date: 1970-04-29
Publication date: 1972-05-16
Anticipated expiration: 1989-05-16
Also published as: ZA704638B; JPS4911303B1; GB1275519A; FR2054252A5; DE1935353A1; DE1935353C2

Abstract

A method and apparatus for adhesively securing two windings at the beginning and end of a wound up band by a tape adhesive on both sides. The tape adheres to a lateral strip portion of a carrier web, which is supplied to the wound up band, and then also adheres to the same. The other lateral strip portion is folded over so that the carrier web becomes stiff. The tape is peeled off the stiff folded carrier web when bent with the wound up band about an edge.

Description

United States Patent Herrmann [4 1 May 16, 1972 [54] METHOD AND APPARATUS FOR SECURING SUPERIMPOSED WINDINGS OFACOIL [72] Inventor: Helmut Herrmann, Cologne-Braunsfeld,

Germany [73] Assignee: Metalloxyd GmbH, Cologne-Braunsfeld,

Germany [22] Filed: Apr. 29, 1970 [21] Appl.No.: 33,000

[30] Foreign Application Priority Data July 11, 1969 Germany P 19 35 353.8

[52] US. Cl ..l56/540, 156/191, 156/470, 242/561 [51] lnt.Cl. ..B65h 39/16, B32b 31/10 [58] Field ofSearch ..156/l9l,446, 470, 471,554, 156/540-542; 242/561 [56] References Cited UNITED STATES PATENTS 2,547,644 4/1951 Hogue et al ..242/56.1 3,227,388 l/1966 Masini ..242/56.1 3,420,429 l/l969 Lewis et a1... ..242/56.l 3,172,612 3/1965 Besserdich... 156/446 3,446,690 5/ l 969 Charles 156/446 Primary Examiner-Benjamin A. Borchelt Assistant Examiner-James M. Hanley Altorney-Michae1 S. Striker [5 7] ABSTRACT A method and apparatus for adhesively securing two windings at the beginning and end of a wound up band by a tape adhesive on both sides.'The tape adheres to a lateral strip portion of a carrier web, which is supplied to the wound up band, and then also adheres to the same. The other lateral strip portion is folded over so that the carrier web becomes stiff. The tape is peeled off the stiff folded carrier web when bent with the wound up band about an edge.

12 Claims, 9 Drawing Figures Patented May 16, 1972 4 mm; NFL W m N Fr, I wf H HM M.

METHOD AND APPARATUS FOR SECURING SUPERIMPOSED WINDINGS OF A COIL BACKGROUND OF THE INVENTION The present invention relates to apparatus for securing the outermost or innermost windings of a coil wound of a band, particularly metal band, by a tape adhesive on both sides and adhering to two superimposed windings. The invention is also concerned with an attaching band which is advantageously used in the apparatus of the invention, and when carrying out the method of the invention.

The wound up coils may consist of eloxadized aluminum band in which the eloxation layer constitutes an insulator between successive windings. According to the prior art, the innermost and outermost windings are secured by a piece of tape adhesive on both sides. This means that at the beginning and end of the winding of each coil, a piece of tape has to be wound into the coil. The tape is adhesively secured to a carrier web, and separated from the same by bending the carrier web about an edge an angle of 180, so that the adhesive tape separates from the carrier web. The peeled off tape is then cut, and a piece of the same drops onto the band which is being wound, adheres to the same, and is wound into the coil.

The apparatus according to the prior art is not absolutely reliable, since under unfavorable circumstances regarding temperature or quality of the adhesive material, the adhesive tape may not separate properly from the carrier web.

It is an object of the invention to provide a method and ap paratus for adhesively securing two superimposed windings of a coil which reliably operates and permits fully automatic operations without disturbances.

Another object of the invention is to provide an attaching band comprising a carrier and an adhesive tape, which can be handled by an automatic machine without engagement of the adhesive tape.

Another object of the invention is to separate the adhesive tape from the carrier tape by folding the latter so that it becomes stiff.

SUMMARY OF THE INVENTION With these objects in view, a method according to invention comprises winding up a band to form a coil of superimposed windings; supplying to the hand during winding of the same an attaching unit including a carrier sheet and a narrow tape adhesive on both sides and being attached with one adhesive side to one lateral strip portion of the carrier sheet so that the other adhesive side of the tape adheres to a portion of the band whereby the attaching unit is transported by the band; folding the other lateral strip portion of the carrier sheet out of the plane of the one lateral strip portion and of the adhesive tape about a longitudinal fold line so that the folded carrier sheet becomes stiff; bending the band away from the stiff folded carrier sheet so that the adhesive tape, unable to bend the same, adheres to the bent portion of the band and is peeled off from the folded carrier sheet; winding up the portion of the band with the adhesive tape to form a winding having the adhesive tape on the outside thereof; and winding another winding superimposed on said winding and on the one adhesive side of the tape so that the windings are secured to each other and prevent unwinding ofthe coil.

Preferably, an attaching band composed of integrally connected attaching units and including a carrier web-and a narrow adhesive tape web adhesively attached to the same, is supplied and is stepwise transported. The attaching units are cut off the attaching band, and each attaching unit is placed on a portion of the wound up band. Preferably, pressure is applied to each attaching unit so that the adhesive tape adheres to the wound up band.

An apparatus according to the embodiment of the invention comprises rotary take-up means for winding up a band; first guide means having a guide channel for guiding a supplied band to the take-up means, and having a bending edge at the delivery end of the guide channel about which the band is bent LII before being wound up; second guide means for guiding an attaching band into the guide channel, said attaching band including a wide carrier web and a narrow tape adhesive on both sides and being adhesively attached with one adhesive side to one lateral strip portion of the carrier web, said attaching band being guided in a position in which the other adhesive side of the tape is placed on a face of the wound up band; presser means engaging the strip portion for pressing the tape against said face of said band so that the other adhesive side of the tape adheres to the face and the attaching band moves with the wound up band; and folding means in the guide channel for folding the other lateral strip portion of the carrier web out of the plane of the one strip portion and of the adhesive tape so that the folded carrier web becomes stiff whereby the adhesive tape bending with the wound up band about the bending edge is peeled off the stiff unbendable carrier web and is placed between two superimposed windings of the wound up band adhesively connecting the same.

In the preferred embodiment of the invention, the apparatus comprises transporting means engaging the other strip portion of the carrier web for stepwise transporting the attaching band along the second guide means; and cutting means for cutting the stepwise transported attaching band after each step. In this manner, the attaching band is cut into attaching units, each having a carrier sheet and a piece of adhesive tape, and each unit is supplied to the wound up band in the guide channel and being transported by the wound up band due to the adhering of the adhesive tape portion of the respective attaching unit to the wound up band.

An attaching band according to the invention comprises a carrier web having a predetermined width; and a tape adhesive on both sides and being substantially narrower than the carrier web. The tape is adhesively attached with one adhesive side to one longitudinal lateral strip portion along one edge of the carrier web, so that the other lateral longitudinal strip portion of the carrier web can be handled in a machine without touching the exposed other adhesive side of the tape. In the preferred embodiment of the invention, the adhesive tape is about half as wide as the carrier web so that the carrier web can be folded about a longitudinal fold line located substantially at the longitudinal center line of the carrier web.

The free longitudinal strip portion of the carrier web may be engaged by transporting means and by folding means which do not get into contact with the exposed adhesive side of the tape.

The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a fragmentary schematic side elevation illustrating a winding apparatus provided with the apparatus of the invention;

FIG. 2 is a fragmentary side elevation illustrating a part of the winding machine shown in FIG. 1 in an other operational position;

FIG. 3 is a fragmentary sectional view taken on line IIIIII in FIG. 1;

FIG. 4 is a fragmentary sectional view taken on line lV-IV in FIG. 1;

FIG. 5 is a fragmentary sectional view taken along a line parallel to line IVIV;

FIG. 6 is a fragmentary plan view illustrating a portion of the wound up band with adhering adhesive tape;

FIG. 7 is a fragmentary perspective bottom view of a portion of the attaching band including a carrier web and an adhesive tape;

FIG. 8 is a fragmentary side elevation illustrating a modification of the apparatus of FIG. I; and

'FIG.8.

DESCRIPTION OF THE PREFERRED EMBODIMENTS As best seen in FIG. 7, an attaching band 33 according to the invention includes a carrier web 34 to which an adhesive tape 36 is adhesively attached. The adhesive tape 36 is adhesive on both sides, and adheres to the wider carrier web 34 along one edge 35 of the same. In this manner, the narrow adhesive tape 36 covers one longitudinal strip portion of carrier web 34 along the edge 35, and the other longitudinal strip portion 37 of carrier web 34 remains free.

As will be described hereinafter, the attaching band 33 is cut into attaching units, each of which includes a carrier sheet, which is a section of the carrier web 34, and a tape portion which is a section of the tape 36.

Referring now to FIGS. 1 and 2, a winding machine includes a turret 10 which is turnable about a shaft 12 in the direction of the arrow 11, and carries three rotary mandrels l5. Turret 10 can be turned steps of 120, so that the three mandrels 15 can be placed in three positions A, B and C. It is possible to wind on each mandrel 15, one or several coils 26 of a band 20.

Each mandrel 15 has axially extending spreading arms 16 which can be adjusted in radial direction to increase or decrease the diameter of the mandrel. In FIG. 1, the spreading arms 16 are shown in the spread position, while FIG. 2 shows the mandrel in the position C in a condition in which the spreading arms 16 are retracted, and the diameter of the mandrel is small. When the spreading arms 16 are in the retracted position, a finished coil can be pulled off the mandrel in axial direction. During a winding up operation, the spreading arms 16 are outwardly advanced.

When a mandrel l5, 16 is in the position A, a bent connector piece 17 is inserted with one end into the gap between mandrel l and a spreading arm 16. Thereupon, turret is turned 120 so that the respective mandrel is placed in the position B. The band 20, or several adjacent bands 20, not shown, which are being wound up on

mandrel

15, 16 in the position C, contact the adhesive outer surface of the connector piece 17, as shown in FIG. 1, and adhere to the same. A cutting means 19 is now operated to cut off the band so that the finished coil can be removed in axial direction after the respective spreading arms 16 have been retracted, as shown at C in FIG. 2. The mandrel 15 with expanded spreading arms 16 in the position B is now coupled by coupling means, not shown, with a drive motor and rotated in the direction of the arrow 18 to wind up the band 26 in as many windings as required for a complete coil 26. When the mandrel in the position B carries a completely wound coil 26, as shown in FIG. 2, the drive motor is disengaged from the respective mandrel l5, and turret 10 is turned 120 so that the completed coil 26 is in the position C. The spreading arms 16 of the respective mandrel 15. are now retracted, as shown in FIG. 2, and after the cutting means 19 has cut off the respective band 20, coil 26 can be removed from the respective mandrel in axial direction.

As shown in FIG. 1, adhesive tape pieces 27, which are adhesive on both sides, are inserted between the first two windings and the last two windings of the coil 26 so that undesired uncoiling of a resilient band 20 is prevented. The present invention is concerned with the method and apparatus for securing two windings at the beginning and end of a coil by means of tape pieces 27 which are adhesive on both sides and stick to the respective superimposed windings.

The band 20, which is to be wound up on the take-up means 15, 16, is supplied into a U-shaped guide channel 24 provided in a guide means 23, as best seen in FIG. 4. The surface of guide channel 24, and particularly of its bottom face, is advantageously covered with a low friction coating consisting, for example, of polytetrafluorethylene, and the lateral walls of the guide channel 24 provide only very little lateral play for the wound up band 20. If several bands 20 are simultaneously wound into several coils 26 on the same mandrel, a plurality of adjacent guide channels 24 is provided in guide means 23, and in the following description it will be assumed that only one guide channel 24 is provided, and only one coil 26 is wound up and secured by tape pieces 27. Turret 10 and take-up means 15, 17 in the position B, are so arranged that tape 20 is bent over a bending edge 25 at the end of guide means 23.

A second guide means 30 has a second guide channel 40, best seen in FIG. 3, which ends at 60 in the guide channel 24, and extends at an acute angle to the same. A supply reel 31 carries a supply of the attaching band 33 shown in FIG. 7, and is rotatably mounted in a curved support which is provided with a slot through which the attaching band 33 is supplied into guide channel 40. The coil 31 of attaching band 33 is in such a position that the adhesive tape 36 faces downwardly, and is located under the carrier web 34 as also shown in FIG. 3. The guide means 30 includes a base plate 41 with a stepped bottom face having a high longitudinal portion 42 and a low longitudinal portion 43 forming a recess in which the tape 36 can move without touching portion 43 of the bottom face. The high longitudinal portion 42 is about as wide as the free strip portion 37 of the carrier web 34 and located directly above the high portion 42. A longitudinal groove 44 having a substantially triangular cross section is provided in the top face of the high portion 42. Guide channel 40 is covered by a cover plate 49 which has a longitudinal slot 46 above which a needle 50 is arranged As best seen in FIG. 1, the needle is mounted on a hydraulic motor 51 which can be operated to advance needle 50 from the normal retracted position shown in FIG. 3, to an advanced position penetrating carrier web 34, and more particularly the free longitudinal strip 37 of the same, and to enter into the groove 44 without touching the portion 42 of the bottom plate 41. In this advanced position, a horizontal hydraulic motor 53 which has a movable member connected with hydraulic motor 51, can be operated to turn hydraulic motor 51 with needle 50 in the directions of the arrow 54, and when hydraulic motor 51 is moved to the right as viewed in FIG. 1 while needle 50 penetrates the free portion 37 of the carrier web 34, the attaching band 33 is advanced one step to the right, while a cutting means 58 is in a retracted position as schematically indicated by the arrow 59. When a section of attaching band 33 has been advanced in this manner into the guide channel 24, cutter 59 is lowered and the respective section cut off. Such a section of the attaching band 33 will be hereinafter referred to as an attaching unit which consists of a carrier sheet and an adhesive tape portion. The length of the attaching unit is determined by the stroke of servo motor 53, and corresponds to the length of the tape portion 27 which is to be inserted between windings of coil 26.

After the attaching unit is cut off from attaching band 33 has been inserted into guide channel 24, it is pressed by a presser roller 62 against band 20, as best seen in FIG. 4. Two presser rollers 62 are provided and rotatably mounted in a supporting structure 63 which can be moved by a hydraulic motor, not shown, up and down in the direction of the arrow 65. As shown in FIGS. 4 and 5, the presser rollers 62 have about half the width of the carrier web or carrier sheet, and are located over the strip portion of the same which carries the adhesive tape 36 so that the latter is pressed against the central portion of band 20, as is apparent from FIG. 6. The free strip portion 37 of the respective attaching unit, is not engaged by a roller 62, but is engaged by a folding plate 36 which has a slanted guide edge engaging the strip portion 37 and bends the same out of the plane of the carrier sheet and of tape 36. The guide edge of folding plate 68 gradually approaches the lateral face of presser roller 62, as is apparent from a comparison of FIGS. 4 and 5, so that strip portion 37 is bent to a position perpendicular to the strip portion to which tape 36 is attached. The carrier sheet has now an angular profile, and is stiff and difficult to bend.

In the embodiment of FIGS. 8 and 9, the folding plate 68 is replaced by a rounded folding channel 37 which is part of a member 80 secured to guide plate 23. The curved folding channel 37 engages the free strip portion 37 of the carrier sheet, and bends the same 180 upon itself, as best seen in FIG. 9 so that the entire carrier sheet also becomes rigid and resistible to bending. Only one presser roller 62 is required, and is carried by a supporting structure 63 which is operated in the direction of the arrow 65 to press the tape 36 with its free adhesive side against the wound up band 20.

OPERATION At the beginning, and shortly before the ending of the winding of the coil 26, the attaching band 33 is advanced by transporting

means

50, 51, 53 one step so that a section of at taching band 33, whose length corresponds to the length of a tape piece 27, is advanced into guide channel 24 of the guide means 22, whereupon cutting means 58 is operated to cut off an attaching unit having the required length while needle 50 is retracted by hydraulic motor 51. The cut off attaching unit adheres to the wound up band and is transported with the same under the presser roller 62 which assure a firm adhesive connection between tape 36 and band 20. At the same time, folding plate 68 in the embodiment of FIGS. 4 and 5, and folding means 80 in the embodiment of FIGS. 8 and 9, bend the free strip portion 37 of the carrier sheet of the respective attaching unit out of the plane of band 20 and of the strip portion of the carrier sheet which carries adhesive tape 36, so that the carrier sheet becomes stiff, particularly against transverse bending. As best seen in FIG. 1, guide plate 68 projects beyond the end of the guide means 22 so that the carrier sheet 33 remains in the folded angular position. The wound up band 20 is pulled around the bending edge 25, and since the stiff folded carrier sheet cannot be bent, the respective adhesive tape portion 36 separates from the stiff angular carrier sheet and continues to travel with band 20 toward coil 26. The material of the carrier web 34, and the properties of the adhesive on both sides of tape 36, are so selected that tape 36 rather separates from the stiff carrier sheet 34 than from the wound up band 20. A separation must take place, since the angular stiff carrier sheet cannot be bent about bending edge 25.

The carrier sheet 33, separated from the tape 36, is subjected to an air stream produced by a blower, not shown, so that the folded carrier sheet is deflected to the position 70 in FIGS. 1 and 8, and moves in the direction of the arrow 72 to a collecting receptacle, not shown. The adhesive tape 36, in the position shown in FIG. 6, adheres to the outside of the wound up band 20, so that the next following winding of band 20 is in contact with the free side of the adhesive tape portion 27, and adheres to the same so that the respective two superimposed windings are secured, and coil 26 cannot unwind due to elasticity of the windings of band 20. As shown in FIGS. 1 and 2, in positions C and B, respectively, the two innermost windings and the two outermost windings of a coil 26 are preferably secured by adhesive tape pieces 27.

If the transporting

means

51, 53, 50 and the cutting means 58 are not provided, the entire continuously supplied adhesive tape 36 would be wound together with band 20, and all windings of coil 27 would be adhesively connected to each other and to tape 36.

It will be understood that each of the elements described above, or two or more together, may also find a useful application in other types of apparatus for securing superimposed windings of a coil by pieces of adhesive tape differing from the types described above.

While the invention has been illustrated and described as embodied in an arrangement in which a carrier web is folded to become stiff so that an adhesive tape adhering to the same can be peeled off by bending over an edge, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalence of the following claims.

What is claimed as new and desired to be protected by Letters Patent is set forth in the appended claims.

I claim:

1. A method for securing superimposed windings of a coil, comprising winding up a band to form a coil of superimposed windings; supplying to said band during winding of the same an attaching unit including a carrier sheet and a narrow tape, adhesive on both sides and being attached with one adhesive side to one lateral strip portion of said carrier sheet, so that the other adhesive side of said tape adheres to a portion of said band whereby said attaching unit is transported by said band; folding the other lateral strip portion of said carrier sheet out of the plane of said one lateral strip portion and of said adhesive tape about a longitudinal fold line so that the folded carrier sheet becomes stiff; bending said portion of said band away from said stiff folded carrier sheet so that said adhesive tape, unable to bend the same, adheres to said bent portion of said band and is peeled off from said folded carrier sheet; winding up said portion of said band with said adhesive tape to fonn a winding having said adhesive tape on the outside thereof; and winding another winding superimposed on said winding and on said one adhesive side of said tape so that said windings are secured to each other and prevent unwinding of said coil.

2. The method of claim 1 comprising supplying an attaching band composed of integrally connected attaching units and including a carrier web and a narrow adhesive tape adhesively attached to the same; stepwise transporting said attaching band; cutting said attaching units off said attaching band; placing each attaching unit on a portion of said wound up band; and applying pressure to each attaching unit so that said adhesive tape thereof adheres to said wound up band.

3. The method of claim 1 wherein two superimposed adhesively connected windings are located at each end of said wound up band forming said coil; and wherein said attaching units are supplied when the beginning and the end of said band are being wound up.

4. Apparatus for securing superimposed windings of a coil comprising rotary take up means for winding up a band; first guide means having a guide channel for guiding a supplied band to said take up means, and a bending edge at the delivery end of said guide channel about which said band is bent before being wound up; second guide means for guiding an attaching band into said guide channel, said attaching band including a wide carrier web, and a narrow tape adhesive on both sides and being adhesively attached with one adhesive side to one lateral strip portion of said carrier web, said attaching band being guided in a position in which the other adhesive side of said tape is placed on a face of said wound up band; presser means engaging said one strip portion for pressing said tape against said face so that said other adhesive side adheres to said face and said attaching band moves with said wound up band; and folding means in said guide channel for folding the other lateral strip portion of said carrier web out of the plane of said one strip portion and of said adhesive tape so that the folded carrier web becomes stiff whereby said adhesive tape bending with said wound up band about said bending edge is peeled off the stiff unbendable carrier web and is placed between two superimposed windings of said wound up band adhesively connecting the same.

5. Apparatus as claimed in claim 4 wherein said guide channel has a bottom face slidably guiding said wound up band; wherein said second guide means guide said attaching band into said guide channel with said tape attached to the underside of said carrier web; and wherein said presser means include pressure roller means having a lower portion projecting into said guide channel and pressing against the upper face of said one strip portion of said carrier web, the axial width of said presser roller means being substantially the same as the width of said one strip portion, and the width of said guide channel being greater.

6. Apparatus as claimed in claim wherein said folding means includes a folding plate widening along said guide channel and disposed under said other strip portion for gradually folding the same about a fold line during movement of said attaching band along said guide channel into a folded position perpendicular to said one strip portion of said carrier web.

7. Apparatus as claimed in claim 5 wherein said folding means includes a rounded folding channel widening along said guide channel and disposed for folding said other strip portion to a position bent substantially 180 upon said one strip portion.

8. Apparatus as claimed in claim 4 wherein said second guide means has a second guide channel for said attaching band, said second guide channel having a stepped bottom face with a high longitudinal portion for guiding said other strip portion, and a low longitudinal portion forming a recess in which said adhesive tape is located spaced from said low longitudinal portion; and wherein said second guide channel ends in said guide channel of said first guide means before said pressure means so that the downward facing adhesive side of said tape is placed on the top face of said wound up band.

9. Apparatus as claimed in claim 8 wherein said high longitudinal portion has a longitudinal groove; and comprising a transporting needle above said groove; means for reciprocating said needle between a retracted position, and an advanced position projecting through said other lateral strip portion into said groove; and means for reciprocating said needle in the longitudinal direction of said groove and of said second guide channel for stepwise transporting said attaching band.

10. Apparatus as claimed in claim 9 wherein said second guide means includes a cover plate for closing said second guide channel, and having a longitudinal slot for the passage of said needle.

11. Apparatus as claimed in claim 9 comprising cutting means disposed at the delivery end of said second guide channel outside of said guide channel of said first guide means and before said presser means, and being reciprocable in synchronism with the movements of said needle to cut said attaching band into attaching units supplied to said wound up band in said guide channel of said first guide means and being transported by said wound up band due to the adhering of said adhesive tape to the same.

12. Apparatus as claimed in claim 4 comprising transporting means engaging the other strip portion of said carrier web for stepwise transporting said attaching band along said second guide means; and cutting means for cutting said stepwise transported attaching band after each step so that said attaching band is cut into said attaching units supplied to said wound up band in said guide channel and being transported by said wound up band due to the adhering of the adhesive tape of the respective attaching unit to said wound up band.

Claims

1. A method for securing superimposed windings of a coil, comprising winding up a band to form a coil of superimposed windings; supplying to said band during winding of the same an attaching unit including a carrier sheet and a narrow tape, adhesive on both sides and being attached with one adhesive side to one lateral strip portion of said carrier sheet, so that the other adhesive side of said tape adheres to a portion of said band whereby said attaching unit is transported by said band; folding the other lateral strip portion of said carrier sheet out of the plane of said one lateral strip portion and of said adhesive tape about a longitudinal fold line so that the folded carrier sheet becomes stiff; bending said portion of said band away from said stiff folded carrier sheet so that said adhesive tape, unable to bend the same, adheres to said bent portion of said band and is peeled off from said folded carrier sheet; winding up said portion of said band with said adhesive tape to form a winding having said adhesive tape on the outside thereof; and winding another winding superimposed on said winding and on said one adhesive side of said tape so that said windings are secured to each other and prevent unwinding of said coil.

6. Apparatus as claimed in claim 5 wherein said folding means includes a folding plate widening along said guide channel and disposed under said other strip portion for gradually folding the same about a fold line during movement of said attaching band along said guide channel into a folded position perpendicular to said one strip portion of said carrier web.

7. Apparatus as claimed in claim 5 wherein said folding means includes a rounded folding channel widening along said guide channel and disposed for folding said other strip portion to a position bent substantially 180* upon said one strip portion.