EP0683122B1 - Pasting means for splicing webs wound into driven rolls - Google Patents

Abstract

The adhesive is formulated to provide both an adhesive and a switching function, the latter giving an indication of the joint to external sensors. Also claimed are the ways in which it is used in various jointing connections. <IMAGE>

Description

The invention relates to an adhesive for connecting on driven rollers wound material webs, in particular for connecting printing material webs a web-fed rotary printing press during its flying web change and a method of making an adhesive joint thereof Substrates.

In rotary printing machines, the printing material, e.g. Paper the printing unit, fed in the form of a printing material web. The printing material web is from a Rolled out, which is clamped in a reel changer. The reel changer is upstream of the printing unit. In order to comply with the requirements of newspaper printing in particular To be able to meet the requirement of uninterrupted printing the replacement of a unwound with a new printing material web roll advantageously in the flying role change. For this purpose, a Reel changer at least over two reels with integrated tensioners, in which the running, as well as the new substrate roll with prepared Adhesive joint are clamped. So that the new substrate roll with the The web of the running substrate can be connected on the fly, the new one Printing material web roll accelerated by means of a drive device until the circumferential speed of the web speed of the running substrate web corresponds. The reliable connection of the adhesive joint of the new Printing material web roll with the end piece of the running printing material web, which with a device for gluing and integrated in the reel changer Capping of the running printing material web takes place, but is without incorrect gluing or Web break only possible if the adhesive joint on the new web roll in has been appropriately prepared.

For this, the tear-off force of the adhesive joint from the new printing material web must be so great be that the adhesive joint during storage in the roller intermediate storage, subsequent transport and loading into the reel changer or does not come off when accelerating the new substrate roll in the roll changer. The location of the adhesive joint on the circumference of the new printing material web should be independent its place of application or the type of loading in the reel changer can be determined as precisely as possible. The adhesive bump should also go away when gluing onto the running substrate without great effort Have it torn off, whereby it should be noted that the web train distribution over the Web width remains as uniform as possible during the covering. Finally, must the adhesive joint transfer the occurring web tension value of the connected web width can and not tear off.

After unwinding the printing material web in the roll changer and printing this web in the printing unit (s) is the now printed web of fabric cut lengthways into individual partial webs when inserted into the folder. After that are the partial webs depending on the required product - usually there are several fabric webs involved in various reel changers and printing units - via one or several folding formers are brought together and, if necessary, folded lengthways. Then the partial web packages combined into individual strands are Folder merged again, cross-cut and according to the required product on a delivery of the folder in the form of a stream of shingles lined up. The web break risks associated with this production process should be avoided or at least reduced.

The connection between the two webs should be the longitudinal cutting devices offer the lowest possible cutting resistance; it should be in the range of The former can be folded as bulge-free as possible - and it should be for everyone Partial web can withstand the occurring train.

The printed copies are taken over by a downstream transport system and transported for further processing or to a forwarding agency. The Scale flow can be deliberately divided because the specimens, the parts of Glue bumps included, cannot be sold and therefore via a so-called paper waste must be eliminated. Because the glue bumps are usually not visible - they may be multiple Web layers covered - the elimination is controlled by the fact that Switch the waste switch in the area of the adhesive material to the Fabric are glued on the contactless, for example by means of inductive or capacitive proximity switch can be detected.

In some applications, where either the single strands from the funnels not merged, but processed in parallel - for example in double double fold - Or the copies lined up in double fold in the folder over one so-called split switch in two streams of shingles - for example double triple fold - be divided, it must be taken into account that the glue joints of the individual Printing material webs separated in the folder and laid out in two deliveries become. In such cases, the split adhesive joints must be placed before each waste switch can be detected and eliminated separately. This also happens for switching the waste points in that materials in the area of the adhesive joint be glued to the web so that they are independent of the division of the Single web over or in the folder without contact, e.g. by means of inductive or capacitive proximity switch, can be detected.

Finally, when preparing an adhesive joint for a printing material web, it applies to the flying reel change to take into account that the web widths e.g. with regard to six plate-wide rotary printing machines in newspaper printing increase significantly, keeping the basis weight of the web as small as possible shall be.

EP 0 418 527 A2 discloses an adhesive joint preparation in which one Starting edge of the roll at an angle of less than 90 ° to the side edge of the Substrate, especially at an angle between 60 ° and 80 °, is cut off. Then the roll start edge with a connecting strip, that spans the entire width of the web, on the one below glued next layer. This well-known connecting strip is longitudinally divided into three zones, one of which lies above the edge of the roll Zone self-adhesive on both sides, the middle zone not adhesive and the one on the the next layer seated zone are self-adhesive on one side. The middle Zone is provided with a perforation running in the longitudinal direction of the strip. Of the The connecting strip is applied so that the middle one with the perforation provided zone comes to lie along the edge of the roll. The beveling the edge of the roll leads to better tear-off behavior when sticking the new ones on the running substrate.

However, this known method requires a time-consuming preparation of the Adhesive shock, because the course of the connecting strip, but especially the Perforation exactly overlap with the start edge of the web got to. This well-known type of adhesive joint formation should also be necessary make sure that the tensioning device when loading with the new substrate roll must be zeroed with regard to the location of the adhesive joint or other suitable measures are taken to detect the adhesive shock need to press the new one exactly onto the running web and one correspondingly synchronized caps of the old ones for this pressing process Printing material web can be guaranteed. Furthermore, this can be known Adhesive joint due to the longitudinal cutting devices only with increased cutting resistance cut and not folded without bulges in the former.

Another type of adhesive joint preparation is known from EP 0 129 238 A1. The leading edge of the web running at right angles to the web side edge the new printing material web with several adhesive strips on the next layer of these glued new printing material web. The adhesive strips have one on both sides one non-adhesive zone in the middle. They will stick on aligned with the leading edge of the web and attached so that the middle zone comes to lie over the edge of the web. After sticking in the perforation in the middle zone by means of an appropriately designed device cut to tear open the adhesive strips when taping over the beginning of the web to facilitate the running printing material web.

Even with this known role change, it is likely to be the same as above described adjustment of the clamping device or other measures are necessary to the exact sticking of the new on the running web and the synchronized capping ensure the running web. The subsequent perforation of the adhesive strips is also expensive, since on the one hand the adhesive tape is perforated cleanly and on the other hand the underlying sheet position must not be injured. Another mis-adhesive and Web break risk is that the web end of the web start edge and the two outer adhesive strips up to the side edge of the web roll neither stapled nor at an angle is cut.

Furthermore, the use of an approximately T-shaped adhesive strip to prepare one Adhesive shock known on the start edge of a printing substrate, in which the Has the shape of one or more adjacent triangles the tips of each such an adhesive strip for sticking the tips to the next web layer is appropriate. Furthermore, on the top layer in the unwinding direction behind that prepared adhesive clay is a further adhesive strip precisely aligned to the adhesive joint from one electrically conductive material applied The detection of this additional adhesive strip by an appropriately trained proximity switch triggers the signal to press the new one on the running substrate and the signal to cut the running Printing material web from.

This method is also still complex, since it has additional adhesive strips with regard to its Location to the actual adhesive joint must be attached very precisely.

US-PS 594 632 discloses the production of an adhesive joint between a new and a running printing material web of a web-fed rotary printing press using an adhesive, in which even an adhesive and a switching function are integrated. This known adhesive is an adhesive strip in the form of a butterfly, which consists of a backing layer made of paper or another thin, flexible material and a metallic foil glued thereon. On the top and bottom of the adhesive tape are on suitable
Apply adhesive layers in each case, on the one hand to fasten the beginning of the web of a new web reel to this web reel and on the other hand to glue the beginning of the web of the new web to the running old web. An adhesive joint using a basically comparable adhesive is also known from GB 2 257 931 A.

An adhesive strip with adhesive surfaces of different adhesive strength is from the WO 93/12025 known.

The invention is based on the disclosure, the production of an adhesive joint with integrated Simplify switching function.

This object is achieved in that the adhesive layer itself with the Double function of gluing and detectability is equipped.

The adhesive can be an independently manageable adhesive strip or can only be used at the Preparation of the adhesive joint, preferably by spraying become.

The invention is used to prepare an adhesive joint between a new and a running printing material web used a web-fed rotary printing press, the two Lanes preferably flying, i.e. while the machine is running continuously, change.

Figur 1

eine schematische Darstellung einer Bedruckstoffbahnrolle von 4/4-tel Breite, deren Klebestoß mit einem Klebemittel mit integrierter Schaltfunktion hergestellt ist;

Figur 2

eine Draufsicht auf eine Ausführung des Klebestoßes nach Figur 1 bei manueller Vorbereitung des Klebestoßes;

Figur 3

eine schematische Darstellung von Bedruckstoffbahnen mit maximal vier unterschiedlichen Bahnbreiten, die für den Klebestoß entsprechend der Figuren 1 und 2 ausgebildet sind;

Figur 4

eine schematische Darstellung von Bedruckstoffbahnen mit maximal sechs unterschiedlichen Bahnbreiten, die für den Klebestoß entsprechend der Figuren 1 und 2 ausgebildet sind;

Figur 5

das Aneinanderkleben zweier Bedruckstoffbahnen in einer schematischen Schnittdarstellung;

Figur 6

die Oberseite eines Klebemittels, das als rechteckförmiger Klebestreifen ausgebildet ist;

Figur 7

die Unterseite des Klebestreifens nach Figur 6;

Figur 8

ein zweites Ausführungsbeispiel einer für einen Klebestoß vorbereiteten Bedruckstoffbahnrolle;

Figur 9

eine Draufsicht auf die Ausführung des Klebestoßes nach Figur 8;

Figur 10

eine schematische Darstellung von Bedruckstoffbahnen mit maximal vier unterschiedlichen Bahnbreiten, die für den Klebestoß entsprechend der Figuren 8 und 9 ausgebildet sind;

Figur 11

eine schematische Darstellung von Bedruckstoffbahnen mit maximal sechs unterschiedlichen Bahnbreiten, die für den Klebestoß entsprechend den Figuren 8 und 9 ausgebildet sind;

Figur 12

die Unterseite eines Klebemittels, das als Klebestreifen in T-Form ausgebildet ist zur Vorbereitung des Klebestoßes nach den Figuren 8 bis 11;

Figur 13

eine schematische Darstellung des Anklebens der neuen Bedruckstoffbahn auf die ablaufende alte Bedruckstoffbahn unter Verwendung eines Klebestreifens entsprechend Figur 12;

Figur 14

eine Vorrichtung zum Vorbereiten eines Klebestoßes durch Aufsprühen des Klebemittels auf eine Bedruckstoffbahnrolle; und

Figur 15

das Ankleben der neuen Bedruckstoffbahn von Figur 14 an eine ablaufende alte Bahn.

The invention is explained below with reference to drawings. Further features and advantages of the invention are disclosed. Show it:

Figure 1

is a schematic representation of a printing web roll of 4/4-th width, the adhesive joint is made with an adhesive with an integrated switching function;

Figure 2

a plan view of an embodiment of the adhesive joint according to Figure 1 with manual preparation of the adhesive joint;

Figure 3

a schematic representation of printing material webs with a maximum of four different web widths, which are designed for the adhesive joint according to Figures 1 and 2;

Figure 4

a schematic representation of substrate webs with a maximum of six different web widths, which are designed for the adhesive joint according to Figures 1 and 2;

Figure 5

the sticking together of two printing material webs in a schematic sectional view;

Figure 6

the top of an adhesive, which is designed as a rectangular adhesive strip;

Figure 7

the underside of the adhesive strip according to Figure 6;

Figure 8

a second embodiment of a substrate roll prepared for an adhesive joint;

Figure 9

a plan view of the execution of the adhesive joint according to Figure 8;

Figure 10

a schematic representation of printing material webs with a maximum of four different web widths, which are designed for the adhesive joint according to Figures 8 and 9;

Figure 11

a schematic representation of printing material webs with a maximum of six different web widths, which are designed for the adhesive joint according to Figures 8 and 9;

Figure 12

the underside of an adhesive, which is designed as an adhesive strip in a T-shape to prepare the adhesive joint according to Figures 8 to 11;

Figure 13

a schematic representation of the gluing of the new printing material web on the running old printing material web using an adhesive strip corresponding to Figure 12;

Figure 14

a device for preparing an adhesive joint by spraying the adhesive onto a roll of printing material; and

Figure 15

the gluing of the new printing material web from FIG. 14 to an old web running off.

1 shows a paper roll as an example for a printing material web roll, which is prepared for insertion into a reelstand of a rotary printing press has been. After damaged web layers have been removed, the wound printing material web 1 at the beginning of the web 2 along an edge of the web 3 just cut perpendicular to the roll side edge 11. Through oblique Cutting the side edges of the leading edge 3 at an angle β is Form of the leading edge 3 has been completed.

Figure 2 shows an adhesive joint 13, in which the web edge 3 in the middle of Partial webs A, B, C and D with an adhesive, namely switching tape 12, with the under Web edge 3 lying next web layer 8 is connected. It is important to ensure that a perforation 34 (Figures 6 and 7) of the adhesive strips 12 approximately along the Start edge 3 runs. The web edge 3 is with a double-sided tape 10, the Demand can run along the entire web edge 3, reinforced. The type and shape the reinforcement depends on the degree of automation of the roll preparation. A full one Automation of the adhesive joint preparation inside or outside the reel changer possible because after cutting the start edge 3 of the adhesive strips 12 in the correct position Roll side and web edge 3 can be glued. If the drive device the reel changer with a peripheral drive, for example a drive with belts 22 (in Fig. 3 indicated), the adhesive tapes 10 in the areas where the Circumferential drive 22 attacks, omitted or covered with a masking tape 14. At This is not necessary for reel changers with a pure center drive.

FIG. 3 shows a schematic overview of printing material webs with the adhesive joint 13 a maximum of four possible configurations of partial webs A, B, C and D. The devices 21 for scanning the switching adhesive strip 12 and thus the location of the adhesive joint 13 on the circumference Like the adhesive strips 12, the new printing material web is also in the middle of each partial web A, B, C and D arranged. The location of the devices for the peripheral drive 22, the Longitudinal section 19 and the former 20 are also indicated schematically. The Arrangement of the adhesive strips 12 located in the adhesive joint 13 makes it clear that the adhesive joint regardless of the division of the printing material webs into partial webs, also according to the Folder can be detected.

The switching adhesive strips 12 are outside of those provided by the devices for the web longitudinal cuts 19 and the funnels 20 predetermined cutting and folding lines applied to facilitate the cutting and folding of the sheets.

FIG. 4 shows configurations of six-page-wide printing material webs with one Adhesive joint shown. For the arrangement of the switching adhesive strips 12 the same applies to Figure 3.

Figure 5 shows a schematic representation of a section through two to be glued together Substrates 1 and 40 in the area of the connections. The new printing material web 1 on a roll, not shown, rotating in the direction of arrow 45 is wound up after or while synchronizing the web speed against the old one also running roll of printing material 40 not shown. To prepare the Adhesive shock has been used an adhesive strip 12 made up of several layers. This adhesive strip 12 has a carrier layer 31 for absorbing mechanical loads on, with one of its two outer zones, both of which are provided with adhesive layers 30, in Area of the leading edge 3 and with the other zone in an adjacent area of underlying next layer 8 of the new printing material web 1 is glued on. Of the The new printing material web 1 seen from the carrier layer 31 has the adhesive strip 12 Switching function layer 32, which is a detection of the adhesive tape 12 and thus Detection of the leading edge 3 of the new printing material web 1 is permitted. In the over the Adhesive layer 30 arranged in the region of the leading edge 3 of the zone Switching function layer 32 is another adhesive layer 33 for gluing the new one Printing material web 1 to the running, old printing material web 40.

In the exemplary embodiment, the switching function layer 32 is designed as an aluminum layer. After a further embodiment is carried out by an electrically conductive strip, preferably an aluminum strip the dual function of Switching function layer and carrier layer. Instead of electrical conductivity can also have other detectable properties for the switching function layer are used, in particular also those properties that are recognized by optical sensors are suitable.

The switching adhesive strip 12 is, for example, a sensor, not shown a proximity switch. Its output signal becomes a suitable one Control for a pressure roller 38 is used, so that this pressure roller 38 in the moment is pressed against the running substrate 40, in which the Web edge 3 passes under the pressure roller 38. In sync with The running printing material web 40 is pressed schematically by means of a shown cutting device 39 severed. In the further course the Start edge of the new web 1 connected to the running web 40 from from the wound new roll, while the adhesive strip 12 is still on the next web layer 8 lying below the start edge 3 sticks. To a To ensure safe detachment of the leading edge 3 could, for example Adhesive layer 30 in the area that is glued to the next web layer 8 be provided with a weaker adhesive than the adhesive in the area of the Web start edge 3. In the exemplary embodiment, however, the adhesive strip 12 is in its middle, adhesive-free zone to form a predetermined breaking point with perforations 34 provided. The two measures mentioned can also be used together be combined.

FIGS. 6 and 7 show an example in the form of a rectangle Adhesive strips 12 in section and on its top and bottom. In this The embodiment is the carrier and conductive layer 31, 32 by a laminated Formed aluminum foil. The middle, perforated zone 34 of the Switching adhesive strip 12 is seen off-center in the longitudinal direction of the strip 12 arranged. It lies in an area of the adhesive strip 12 that extends from approximately the middle can range up to about a quarter of the length of the strip 12. The takes Zone of the switching adhesive strip 12, which is covered on both sides with adhesive layers 30 and 33 is provided, the greater part of the length of the switching adhesive strip 12. The Adhesive layers 30 and 33 are both on the top and on the Underside formed close to the perforation 34.

FIG. 8 shows an alternatively designed adhesive joint, in which at the beginning of the roll 2 with the aid of a triangular template 18 which has a length of three partial webs, the leading edge 3 has been subtracted twice at an angle β. Here is the triangular template 18 perpendicular to the roll side edge 11 on the Printing material web 1 has been placed. Then the web edge 3 is to the places shown in Figure 9, namely the tips formed when pulling the Web edge 3, with adhesive tape 49 with the next one below Layer 8 connected. Make sure that the edge 3 approximately coincides with the front end of each switching adhesive strip 49. Last the adhesive joint 23 thus formed is in turn by means of a double-sided adhesive tape 10 - along the entire edge of the web if necessary 3 - reinforced. The type and the shape of the reinforcements in turn depend on the level of automation Preparation of roles. A full automation of the glue joint preparation is possible, because after cutting the leading edge 3 by means of the guided Triangle template 18, the switching adhesive strips 49 in the correct position for the roll side and Web edge 11, 3 can be glued. Regarding the location of the Attachment of the switching adhesive strips 49 used in this exemplary embodiment applies to what has been said about the rectangular switching adhesive strips 12.

Figures 3 and 4 corresponding schematic representations of 4/4-th and 6 / 6th wide substrate web configurations for those with the triangular template 18 prepared printing material webs are shown in FIGS. 10 and 11.

FIG. 12 shows a top view of the one preferred for the alternative adhesive joint 23 Switching adhesive strip 49. This switching adhesive strip 49 has the shape of a Butterfly on or has a simple T-shape. A laminated aluminum foil in turn forms the carrier and conductive layer 51, 52 in the zone of the T strain on the upper side, namely the side of the conductive layer 52, with a Provide adhesive layer 53 for sticking to the old, running printing material web is. This is on the lower side facing the new printing material web Switching adhesive strips 49 are provided with three adhesive zones 50. The middle adhesive zone 50 fills in the T stem. Two side adhesive layers 50 are on the two zones of the T-bar applied. Between the T-bar zones and the T-trunk are closed Zones 55 on both sides of the adhesive layer 50 of the T-root zone formed by incisions 54 at the approach of the T-beam as predetermined breaking points serve when tearing off the glued edge of the web. A tape 49 with this formation of the predetermined breaking point with parallel to the web side Fracture lines prove to be particularly advantageous with regard to tear-off security. As already in the case of the rectangular switching adhesive strip 12 are also sufficient this T-shaped switching adhesive strip 49, the three adhesive zones 50 and the adhesive zone 53 each in the immediate vicinity of the through the recesses 54 in the Adhesive-free zones 55 defined break lines. With regard to the layer structure the explanations for the rectangular strip 12 apply.

The choice of the shape of the adhesive joint 13 or 23 according to the exemplary embodiments according to Figures 1 to 4, 6 and 7 and Figures 8 to 13 does not hang last of all from the substrate width, the web quality and also from the production speed to be observed.

In FIG. 13, the two printing material webs 40 and 1 are glued again shown using the T-shaped switching adhesive strip 49. The Roll of the new printing material web 1 just one turn after sticking the new printing material web 1 to the running web 40 completed.

Figure 14 shows a fully automated adhesive joint preparation for applying a Adhesive fluids. A movable device 64 for applying adhesive fluids 60 and 61 are approached to the new printing material web 1, and the beginning of the web 2 of the new web 1 is, for example, by means of the underlying web layer 8 blown compressed air lifted off. One in the applicator 64 vertical Movable pad 67 is moved under the lifted web start 2. A first adhesive fluid 60 is then applied using a first nozzle arrangement 65 on the top of the web start 2 and a second adhesive fluid 61 by means of a second nozzle assembly 66 sprayed onto the underlying next sheet layer 8. Instead of these two spray devices 65, 66, other suitable ones are also suitable Order facilities conceivable. The two adhesive fluids 60 and 61 can evenly over the entire width of the printing material web 1 or also unevenly, for example, distributed over the width of the printing material web be applied.

The new printing material web 1 is with the old, running printing material web 40 around a common pivot point 72 in a roller stand 70 pivotable. The swivel arm 71 pivots after Apply the two adhesive fluids 60 and 61 counterclockwise into the in Figure 15 shown location. After applying the two adhesive fluids 60 and 61 the application device 64 is moved away from the new printing material web roll and the beginning of the path 2 is on the underlying next layer 8 in the area of glued second adhesive fluid 61.

FIG. 15 shows the printing substrate web 40 running off and the new web 1 after the Swing immediately before sticking. Pressing the expiring Printing material web 40 to the outer circumference of the new web 1 in the area of Adhesive joint 63 prepared in this way takes place in the manner described for FIG. 5. After the area provided with the second adhesive fluid 61 is below the The beginning of the web 2, the web layer 8 lying outside the area of the pressure roller 38, becomes a material 69 neutralizing this adhesive fluid 61 by means of an arrangement 68 applied to the adhesive fluid 61 in order to attach the new one a second time Prevent substrate 1 in this area.

One or both adhesive fluids 60 and / or 61, preferably the first adhesive fluid 60, is characterized by its switching functionality. Preferably that Adhesive fluid 60, 61 in question are mixed with electrically conductive components.

The first adhesive fluid 60 is preferably a stronger one adhesive material than in the second adhesive fluid 61. This will tear off the beginning of the web 2 after adhering to the running printing material web 40 facilitated. A powdery material is preferably used as the neutralizing material Material 69 used.

Claims (18)

1. An adhesive joint for joining material webs wound on driven reels between a new stock web (1) and an unreeling stock web (40) of a reel-fed rotary printing press, an adhesive means being used for the adhesive joint in which there is incorporated, as well as the adhesive function for joining the new to the old web (1, 40), also a means detectable contactlessly by means of suitable sensors for detecting the adhesive joint as the web (1, 40) passes through, characterised in that the adhesive means (12; 49; 60, 61) has at least one adhesive layer (30, 33; 50, 53; 60, 61) which contains the detectable means.
2. An adhesive joint according to claim 1, characterised in that the detectable means may he detected contactlessly, more particularly inductively or capacitively.
3. An adhesive joint according to claim 1 or 2, characterised in that the adhesive means is an adhesive strip (12; 49) with a control-function layer (32) which is reflective or electrically conductive at least regionally.
4. An adhesive joint according to claim 3, characterised in that the adhesive means is formed by an arrangement of layers, with at least one carrier layer (31) to absorb mechanical stresses.
5. An adhesive joint according to claim 4, characterised in that, in a region of the lower adhesive layer (30; 50) with which the adhesive means (12; 49) is Stuck onto a beginning (2) of the new material web (1), the adhesive means (12; 49) has greater adhesive strength than in the detent region of the lower adhesive layer (30; 50).
6. An adhesive joint according to one of claims 3 to 5, characterised in that the adhesive means has roughly the shape of a rectangular adhesive tape (12) which is about three times as long as it is wide and has a perforation (34) as a predetermined breaking line which is arranged at about a quarter to half of the length of the adhesive tape (12).
7. An adhesive joint according to claim 6, characterised in that the upper adhesive layer (33) is only applied on one side of the perforation (34) and the lower adhesive layer (30) is applied on both sides thereof.
8. An adhesive joint according to one of claims 3 to 5, characterised in that the adhesive means has roughly the shape of a butterfly or a T-shape (49) with a maximum length which is about double the maximum width, and in that the surface portions (55) located between the stem of the T and the two bars of the T are each provided with a recess (54) as a predetermined breaking point.
9. An adhesive joint according to claim 8, characterised in that only the stem region of the T of the adhesive tape (49) has an upper adhesive layer (53) up to the vicinity of the respective recess (54) and the lower adhesive layer (50) also covers the two bar regions of the T up to the vicinity of the respective recess (54).
10. An adhesive joint according to claim 8 or 9, characterised in that a web beginning (2) prepared in order to produce an adhesive joint (23) is prescribed by the use of a triangular template (18) which has a width of three partial webs (A to F), the adhesive means (49) having a butterfly shape or a T shape heing respectively applied in the region of the apexes of the web beginning (2) defined by the triangular shape of the template (18).
11. An adhesive joint with an adhesive means according to claim 1 or 2, characterised in that one or more adhesive fluids (60, 61), more particularly sprayable adhesive fluids (60, 61), are used as adhesive means.
12. An adhesive joint according to claim 11, characterised in that adhesive fluids (60, 61) of differing adhesive strength are used.
13. An adhesive joint according to one of the preceding claims, characterised in that the detection of the adhesive joint (13; 23; 63) by means of a proximity switch triggers a signal for pressing the new web (1) onto the unreeling web (40) and for severing the unreeling web (40) and/or actuating a waste diverter.
14. A stock web reel of a rotary printing press with a web beginning (2) prepared as an adhesive joint for the flying web change, an adhesive means being used for the adhesive joint in which there is incorporated, as well as the adhesive function for joining the prepared web beginning (2) to an old web (40) unreeling in the press, also a means detectable contactlessly by means of suitable sensors for detecting the adhesive joint as the web (1, 40) passes through,
    characterised in that
    the adhesive means (12; 49; 60, 61) has at least one adhesive layer (30, 33; 50, 53; 60, 61) which joins the prepared web beginning (2) to the old web (40) and itself contains the detectable means.
15. A stock web reel according to claim 14, characterised in that the adhesive means (12) is applied outside the cutting and folding regions and the contact region of peripheral drive means (22) of a stock web (1), more particularly approximately in the middle of partial webs (A to F) of the stock web (1).
16. A method for producing an adhesive joint between a web beginning of a new stock web (1) and an unreeling stock web (40) of a reel-fed rotary printing press, an adhesive means being used for the adhesive joint (63) in which there is incorporated, as well as the adhesive function for joining the new to the old web (1, 40), also a means detectable contactlessly by means of suitable sensors for detecting the adhesive joint as the web (1, 40) passes through,
    characterised in that

    a) the web beginning (2) of the new stock web (1) is lifted off the new stock web reel,

    b) a first adhesive fluid (60) is applied to the web beginning (2) and a second, more weakly adhesive, adhesive fluid (61) is applied to the next web layer (8), at least one of the adhesive fluids (60, 61) containing the detectable means,

    c) the web beginning (2) is secured by means of the second adhesive fluid (61) to the new stock web (1),

    d) the web beginning (2) is secured with the first adhesive fluid (60) to the unreeling web (40) and the unreeling web (40) is severed, and in that

    e) the exposed second adhesive fluid (61) is rendered inactive.
17. A method according to claim 16, characterised in that an electrically conductive adhesive fluid is used as the first adhesive fluid (60).
18. A method according to claim 16 or 17, characterised in that the first and the second adhesive fluid (60, 61) are respectively sprayed over the whole web width evenly or in spots.

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