FI110690B - Web joining splice for start of web coil - comprises adhesive tape with optional adhesive layer on back side - Google Patents

Abstract

The splice joins the leading end of a fresh coiled web to the trailing one of an old coil, using an adhesive tape glued under the leading end of the fresh web. The tape has a further coating of adhesive on the back side, by which it is glued to the end of the taut outermost turn of the coil. The adhesive can be in longitudinal strips along the edges, with those on one side narrower than those on the other one.

Description

ADHESIVE TAPE - LIMRESA 1 10 6 9 U

Separated from patent application 911445.

The invention relates to an adhesive tape according to the preamble of claim 1.

A prior art method for making seam joints of moving webs of materials in open-release machines is known, for example for end coating, in which a double sided adhesive tape is glued to the end of a roll of web on a machine roll. After the web end is subsequently secured to the machine roll, the second adhesive tape cover film is pulled off so that when the old web passing through the machine roll is pressed, the ends of the material webs are joined. This has the disadvantage that later on the coating device, for example a blade acting as a coating scraper for the coating mass, produces a strong impact due to the front end of the attached paper web colliding with the blade. In addition, at this point, there is a specific, though not small, coating of coating material which tends to stain subsequent rollers, folding rollers, etc.

It is an object of the invention to provide an adhesive tape which enables * · ·: * to produce a web joint without the aforementioned disadvantages, so that, in particular, only a minor impact and a lower impact edge of the material web occur in a subsequent hair event.

This problem is solved by the inventive features of claim 1 according to the invention.

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The invention will now be described with reference to the embodiments shown in the figures of the accompanying drawings. Drawings present:

Fig. 1 is an adhesive tape according to the invention,

Fig. 2 is a sectional view of a machine roll provided with a finished butt 11a of a web of material,

Fig. 3 Ratios of back-end overlay to overlay

Figures 4-7 other forms of adhesive tape other than Figure 1 are each viewed transversely to the longitudinal direction of the tapes,

Fig. 8 transverse to the axis of the machine reel in the beginning of the web,

Fig. 9 shows the furry afterwards,

Fig. 10 is a machine roller carriage having a guide for a tape containing cassette tape, 'Fig. Li detail view of the holder and Fig. 12 substantially associated with the figure in part 1 e i - ···! overlap along the dotted and dashed lines in Figure 11,

Fig. 13 holder and 1 insert 11a for guiding the material web head: and for fitting it to the machine roll, • · ·. Fig. 14 is a detail of this device, Fig. 15 is a side view of another such Fig. 11a; FIG. 16 details from the end of the web of material shown in Figure 13, 110690

Figs. 17 and 18 illustrate, in other embodiments such as Fig. 13, automatic sealing motifs.

In Figs. 1 and 4-6, the adhesive layer is indicated by dashed lines and similar or similar strip portions, for example also by masking foils, are denoted by the same reference numerals, but by several different 1 patches.

Fig. 1 shows an adhesive tape 1 consisting of a carrier 2 of an adhesive layer 3, with cover strips 4 and 5 separated by a longitudinal seam 9 and adhering to the adhesive layer 3, and other narrow adhesive strips (including adhesive tape) 7 on both sides having a second adhesive foil 8. also be replaced by a line of glue dots or glue spots.

In this case, the bonding force of the adhesive layer 7 under the cover film 8 is substantially greater than the adhesive force of the adhesive layer on the other side of this adhesive line 7. Since this adhesive strip according to Fig. 2 secures the adhesive tape to the end C of the roll of material of the machine roll or web roll A, when tearing off the old web, the two tapes adhere to one adhesive beverage, 1 * va on the machine roll but not to the adhesive tape. 3 with a slight thickness relative to the formula 11 (coating on the blade S). Thus, only a very small amount of coating mass can remain at this impact site.

Preferably, adhesive strips 6, 7 (or 10) - which can, ·,; also consist solely of a layer of adhesive - the bonding force • j · § on the adhesive tape 2 on the opposite side is smaller than on the other side. For this purpose, glue surfaces »*« of different sizes on both sides can also be formed - with the adhesive thickness being equal on both sides.

·. : Adhesive strip 7 (etc. 6, 10, see Fig. 4; 11, see Fig. 5) * i follows the hair point at a distance from the base of the machine roll and can thus 110690, under various conditions, remove paper scrap residues from the scraper resulting from the removal of the old paper web. is very important for the quality of the coating applied.

Naturally, the "end" C of the web of material is the "beginning" of the machine roll or web roll A.

Fig. 2 illustrates a situation in which the tape tape 1 is attached on one side of the web C of the machine roll A to the inner side of the machine roll and on the other side B of the same web revolution. G) wherein this end is temporarily attached to a roll of adhesive 1 ee 11a P. Therefore, the device of Figure 2 already has a cover film 5 pulled off one side of the adhesive tape 1. In order to make the joint between the ends of the material web according to Figure 3, the second part of the cover film 4 is also pulled off the adhesive tape 1. Thus, at this point it is possible to attach the material web C to the old material web D. The arrows in Figure 3 show the direction of travel of the material web. It can still be seen from Figure 3 that the narrow adhesive strip v still adheres to the machine reel and is thus released from the 1 seam tape at position 1 where the reinforcing tape 70 is »· additionally glued to the machine reel, but can often also be omitted.

i »'* Due to the circumstances, such an adhesive tape such as the one mentioned above,; cotton wool, however, is not available and therefore the conditions · * · *; a method for making a hair spot, and the following l describe in detail the use of various ribbon shapes, ·,; where from. These may have not only a strip of adhesive, for example 6 or 7, but also a mucosa of similar width 1.

V 'As mentioned above, the beginning of the web of the new machine roll A is turned into a loop G and glued with small pieces of adhesive strip P on its machine roll. The first foil tape 2 is then removed, for example, and this adhesive tape 1 is glued on this adhesive surface onto the web C, parallel to the web edge (axially similar to the above web end). Here, for example, a narrow, double-sided adhesive strip 7 with an overlay film 8 is glued to the adhesive tape 2 on the longitudinal edge of the strip, for example, because there is still a masking film 4. All of this can be done by hand or also in the strip opening 11a11ee 11a which is guided in a rail parallel to the axis of the web roll. The term "narrow adhesive strip" (or adhesive film) as used herein means that it does not have the entire width but, for example, only a width which is at most 80% of the width of the adhesive tape 2, 2 ', etc. Thus, within the scope of the invention, it is preferable to use "narrow" adhesive tapes.

According to Fig. 4, the adhesive tape 2 may also be provided with a plurality of smaller adhesive strips 6, 7, possibly also 10, having a cover film 8, 8 'and 8' 'on their non-adhesive side.

Another form of tape is shown in Fig. 5, which has another adhesive tape 11 applied to both edge adhesive strips 6 'and 7' as an adhesive tape 2 'having a covering film 12 which may still have a separation point E analogously to the covering films 4, 5 or 4', 5 ' with the point of separation. Then the portions of the cover film 12 can be pulled off sequentially and fastened in succession to the adhesive tape 11 and thus also to the adhesive tape 2 'and thus also the web opening C to the web roll.

* * * * «··, * Figure 6 shows an adhesive tape having a double-sided 1 * i · adhesive layer. On one side, as described above, there is a split cover film 4 '' and 5 '' and on the other side a stripe-like adhesive layer as shown by dashed lines, wherein; the individual film bands are covered with a cover film 71-74. These ... cover films can be successively pulled off with the web base C being tightly fitted to the web reel and thereby secured to the adhesive - *, · 'ribbon 2' 'firmly on the web reel.

* »·, V. This occurs according to the conditions where ι · <; according to the additional adhesive tape is applied over the last i * »of the last lap of the web roll. This is preferably a single-sided adhesive tape 70 'used when the machine roll is wavy in the axial direction due to moisture and grooves are formed. In this case, the adhesive tape 70 'is attached with a very high adhesive force 11a to the rolls of the machine roll A, and then this adhesive tape 70' is then attached to very narrow adhesive strips 6, 7 or 10 or adhesive strips 11 (Figure 5) or 2 * '(Figure 6).

Auxiliary tape 70 'glued directly onto the corrugated machine roll - see Fig. 8 is relatively wide, as seen in Fig. 3, so that all the narrow adhesive strips 6, 7 can catch on it. Here, the adhesive tape 70 or 70 'has a very high adhesive layer so that at high speed, where the beginning of the new web or machine roll A is connected to the end of the old web D, this adhesive tape and the narrow adhesive tape 6, 7 remain attached to the machine thus, comes off the main tape 2.

Figure 7 shows a further liimanau-hamuodon option of Figure 5, which is used herein as a double width of adhesive strip that is approximately the center of the perforation strong H of the turning direction of the arrow F can be formed in the shape of the tape of Figure 5 is shown. For this' (· (*, in practice, here too, small adhesive strips 6 'and 7' are provided, as shown in Fig. 7). This adhesive tape; **: must be provided with 1 Thus, the shape of the mask images in this case also corresponds to Figure 5.

* * t · * · • · This is a matter of relatively large surface areas, e.g. · Included in the cover films 4, 5, 4 ', 5' or 4 '', 5 '' so that the jointing of the moving webs can later be achieved i * »i · · in the hair device (for the so-called" Flying Splice ") ).

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The beginning C of the paper web is surpassed by the tail created when gluing i ·! > the tape is not precisely bonded to the axial web edge, otherwise absolutely directly, can later be separated, for example, in one simple manner, along the adjacent axial edge of the remaining masking film 4, 4 '', e.g. by tearing off.

It is contemplated that the ribbon shapes of Figures 1 and 4-7 may be manufactured industrially and thus commercially available. To this end, the method described above will be simplified, as described below.

In the case of Fig. 2, the adhesive tape 1 or 2 is not bonded as a loop G, but directly to the web roll A, for example partially to the next round B, with narrow adhesive tape 11a 7 or, if more than one, 1. adhesive tape vi 11a 7, 8 or 10 which are applied to the back of the adhesive tape 2. Existing cover films 8, 8 'or 8' 1 are naturally removed in advance. In this case, the resulting loop G is so large that after opening the loop, the beginning C of the web, as shown in Figure 2, can still be well bonded to the adhesive tape at the point released from the cover film 5. In this case, one still has to leave a certain end "tail", which is then preferably removed by hand, whereby, for example, along the edge of the adhesive layer or the present cover film, this "tail" is torn off. In this way, a very simple process has been achieved: * ': making hair spot without needing, |' expensive equipment. It is of course possible to prepare! * * I'm a simple device with a line guide to fit adhesive tapes to a web roll. You can also give up the loop G m u o -; '' ,; but given in accordance with Fig. 2, loose (F * web head simply hang.

; However, Figure 2 shows with dashed dashes that the tape * * * * * ·. * Can also be glued to the outside of the hose G.

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Figure 9 illustrates in principle how the above method can be used quite well in a winding device for a web reel, namely, to stop a new web reel (i.e., of course, the same web). i <iri ka old). Hereby, in the last described manner, 8 110650 adhesive tape 1 or one of the applications according to Figures 4-7 is glued to the web string 11 as shown by arrow 1. The front is then the side which preferably has a permeable 1 air layer and covers 4 and 5 or 4 'and 5' or 4 '1 and 5' '. Next, the cover film is removed, in Examples 5 or 5 'or 5' '. Then, a circle is rotated in the direction shown in the direction of rotation of the web roll so that the strip 1 passes the press nip between press roll 71 and the web of the roll nip. In this passage, the - lateral web beginning C is secured to web web A by means of an adhesive tape 1. Advantageously, or only backwards, the new web roll 73 can be separated by the cutting blade 72 from the old machine roll 73. The remaining "tail" of the web roll A is then - as described above - preferably separated by hand along the impact points 4 and 5. As mentioned, the cover film 4 will usually remain on the 1 ribbon band as this will only be detached when the hair joint is finally made when the web roll is processed.

This method may also be modified by gluing the adhesive tape to the front side of the web end - i.e., the cover film part 4 or 5, 4 'or 5', 4 '' or 5 '' - at the press roll 71, then pulling possibly smaller adhesive strips 6 or 7 or 10 cover films 8, 8 ', 8' 'off and glue ·, ·. · with this adhesive strip, the tape and hence the end of the web, i.e. -t] · * basically a new web start C on a new web reel A, • * i rotating a new web roll A • · · in a winding direction for a given distance so that the adhesive tape passes; '· The press point between the press roll 71 and the new web roll A.

Fig. 10 shows a substantially sketched machine roller carriage * 80, in which a bearing plate 82 is provided on the body 81 for the axis 83 of the roller sleeve 84. The body 81 has a substantially horizontal bracket 85 perpendicular to the roll axis or circumferential surface of the machine roll V · A on either side of the machine roll A. This is supported in this case by a holder strip 87 having a guide, • Wherein the brackets 85 are vertically movable. The brackets 85 have a guide rail 86 which is movable horizontally in the 110690 directional guides 88. The guide rail can be removably stored with a cassette or other unwinding device for adhesive strips or tape strips and guided. A guide rail 86 'may also be provided for the guide rail 86, as shown on the dotted line, substantially on both sides of the machine roll of the machine reel carriage substantially radial to the reel axis. It is not disclosed herein that the cassette or unrolling device for adhesive tapes for example, a cassette could be a compound The spring is slid through the slider 1 into the slider which slides in the guide 89 of the guide rail 86.

Fig. 11 shows how the cassette K can be held by the Liu bar body 91 and the support rail 92 in the guide rail 86 and then guided along this, the support rail 92 is secured by a spring 93 and a securing bolt 94 to the reading body. The bolts 94 are screw bolts and thus the retaining rail 92 and cassette can be replaced with a new one according to the particular needle. For this purpose, a retaining plate 95 is operable which can be attached to the retaining rail 92 of the wing nut 97. It is further shown that the narrow, thin strip 96 can be used to separate the cover film from the adhesive tape roll R during unwinding of the adhesive tape roll.

• · • · · •,, t) | Fig. 13 shows a device for insertion of adhesive tape 1 onto the end C of the material web. To this end, a pivoting body 22 is provided with a bearing 33 mounted on a bearing 33 at its upper end. This retaining roller is a hollow cylinder having loose aperture openings 34 which are connected to a negative pressure generated inside the retaining roller 13 as compared to the outdoor air, · f ·, below the retaining roller 13 is provided with a pivotable pivot - * · · lever 15 and has a work plate 16. Hydraulic pusher 29 V · can be rotated by this push rod 30 to a position indicated by dotted lines, whereby work surface 16 rests on the luminaire of retaining roller 13. Hydraulic pusher 29 remains, · t; the pivoting body 22 in the bearing device 32. The pivoting body is further rotatable by a hydraulic ram 11 which is fixed

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secured by a bearing member 24 to the base plate 19 and a 1aakerie 1ime 11 23 to the pivot body. The pivoting body is again pivotable around the bearing location 27 of the base plate 19.

Fig. 14 is an enlarged view of a workbench 14 having a worktop 16. This worktop has a plurality of retaining members (retaining tabs) 25 that allow the alignment of the strips of adhesive on the worktop 16. In addition, the work plate still has bores 26. Because the desk 14 is formed as a hollow housing that can be subjected to a vacuum under port 41 relative to the outdoor air pressure, this vacuum acts through the bores 26 and holds the adhesive strips so that they cannot fall in the direction of the retaining roller 13.

The adhesive tape, or a piece of the adhesive tape completely of Figure 1, is placed on the work plate and is thus made to adhere to the end of the web C when the work table 14 is turned up. By rotating the guide and holding roller 13 or the machine roller A, the end of the material web C is guided to the fastening position relative to the machine roller A. The cover film 8 of the narrow adhesive strip 7 is removed beforehand.

Figure 14 shows that the working sheet has a tear edge 18, which corresponds to the curved edge of the end C of the web. In the position shown in the dotted line of the desktop of FIG. 13, this edge can be achieved by tearing off excess paper.

Other accessories are, of course, conceivable,. ; which allow the material web to be cut to a pre-defined shape;

Fig. 16 shows the position of the adhesive tape 1 where it is' ... · secured from the desk 14 as shown in Fig. 13 to the end of the web. Fig. 15 shows a device for a guide roller 13 with. ; there is no desk 14 according to Fig. 13. Instead, there is provided a fixed work plate 17 which is attached to

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size 22 '. Here, an adhesive tape 1 or a piece of adhesive tape is immediately applied by hand over material web C.

In Fig. 17, the desk 50 is formed as a casing of approximately square cross-section. The working surface on which the adhesive strip is placed is marked with the reference 11a 16 '. The interior of the housing is hollow and is preferably under vacuum at least partially relative to the pressure of the outside air, in any case in the region where the working surface 16 'is located. It is provided with an interface 41 (denoted 41 ') as shown in the embodiment of Figure 14. Similarly, bores 26 are provided on the desktop, as in the embodiment of Figure 14. For the serrated joint of Fig. 14, there are likewise provided fastening pins 25, which of course must be designed to be immersed, for example, by loading with a spring.

The end of the web of material depends on the dotted line above the holder roll 13. The desk 50 is first pivoted to a position where the blade 54 cuts the material web head to the Karvi edge. For this purpose, the housing surface of the retaining roller 13 is preferably rubberized. The adhesive strips disposed on the work surface 16 'are held in place by the underpressure and then twisted by the pivot arm 15' to the position of the work surface 16 'as shown in the figure. The ribs can also be attached in the Zick-Zack form to the end of the material web by means of 50 controlled rotations of the desktop.

; 'I'; This pivoting movement can be accomplished either by a stepper motor or by hydraulic means corresponding to Fig. 13: means 21 and 29, by means of end operation. Swivel body responds to ·; 13, and is referred to herein as reference 11a 22 ''.

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In Fig. 18, the desk is formed as a hollow cylinder-shaped roll 52. It also has a cutting edge 54. The working surface is conceivable in a comparable position to that of the desk of Fig. 13. Here too, you must

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the desk-forming roller 52 having a pivoting or rotating drive for a particular pivoting or rotating motion.

Preferably, the bending moment of the retaining roller 13 is substantially greater than the corresponding torque i of the desk 16, 50 or 52.

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Claims (3)

Adhesive tape, said adhesive tape having on its front substantially completely an adhesive layer or two parallel adhesive layers separated by a narrow interstitial space, characterized in that this adhesive layer or adhesive layers (3) supports cover films (4, 5; 4 ', 5' ; 4 ", 5") separated by a longitudinal joint or intermediate space, and the adhesive tape on its other side (back side) supported at least one running parallel to the band's longitudinal edges (L, M) on both sides with an adhesive layer (6, 7, 10) or adhesive film which may additionally be formed in the form of a series of dot-shaped adhesive patches, and that at least one adhesive strip (6, 7, 10) or adhesive film is provided with a covering film (8, 8 ', 8 " ) and that the adhesive strip (6, 7, 10) on the opposite side of the adhesive tape (2) has a less adhesive force than on the cover film side. Adhesive tape according to claim 1, characterized in that at least 15 adhesive strips (6 \ 7) or adhesive film in the area around the tape's longitudinal edges (L, M) are provided with an additional adhesive tape (11) which at its non-adhesive back side is glued together with both adhesive strips or films and preferably covered by a cover film. 3. Adhesive tape according to claim 1 for the creation of joint joints on movable blanket strips, for example in coils of roll-coating machines, which adhesive strip comprises a two-sided adhesive layer, characterized in that one; the adhesive layer is covered by a cover film which is split into two substantially Large parts (4 ", 5"); with a longitudinal joint and that the second adhesive layer is divided into strips and is preferably covered by a cover film (71 - 74). I »1 ·