DE102004023366A1 - Cover binding splices for packaging machine have connection whose sealable layer is sealed with sealable layers of bindings joined to each other at impact edges - Google Patents

Abstract

A seam is formed when the impact edges (16) of bindings (14,15) are joined together. A connection (3) comprised of the same tape material as the bindings connects the bindings to each other such that the sealable layers (2) of the connection and bindings are sealed with one another. Independent claims are also included for the following: (A) an exact positioning method for bindings; and (B) an exact positioning device.

Description

The The invention relates to a cover band with a seam on which the edges joined together two band parts are, and with a two band parts bridging connecting element, by which the two band parts are connected together.

The The invention also relates to a method for positionally accurate connection of lid tapes from strip material, in particular coated with sealable material Foil in which tape material holes for the Transportation, for punched the positioning, etc. and pre-punched lid profiles be in the cover band by means, in particular webs, be held, in which method the beginning of a new band Cover tape roll and the expiring tape end of a used cover tape roll between two successive lid profiles on the tape transversely to the longitudinal direction of Web for forming abutting edges cut, positioned at the seam butt joint and with a about that put together connecting element.

Farther The invention relates to a device for positionally accurate Connecting cover bands, which abut one another at an interface with their abutting edges, one sealable layer and have a series of spaced-apart, pre-punched Having lid profiles, with the help of an attached at the interface, also a sealable Layer having connecting element.

movies, especially narrow films, tear from time to time, so that the two parts of the film must be accurately connected together to the film throughout to be able to show. The two film ends are for it transverse to its longitudinal direction cut and overlapping snugly inserted in an adhesive press. There will be a knife or a another hard object (for example, a corrugated roller) one Scratched off the side of the coating so that a subsequently applied Adhesive, for example acetone, after superimposing the two Film ends glued to each other perfectly. With disadvantage comes one does not without an additional Adhesive off.

It is known to seal cup-shaped packages with round aluminum lids after filling the packages by sealing the lids on the upper circle edge of the cups. For feeding the lid in the form of blanks is after the DE 196 54 373 used a cover strip, in which the lids are pre-punched and releasably mounted on holding webs at a distance one behind the other. A plurality of lids may be moved and stopped as one piece under a series of processing stations. This ensures easy handling and also a positioning capability. The cover bands are wound on cover tape rolls, and even at the time of manufacture there is sometimes the need to connect tape parts together, for example, to create a larger cover tape roll.

in the longer Operation of a packaging machine of course consumes the running lid tape roll, so that the tape end with the beginning of the tape a new cover tape roll must be connected. This joining is called also splicing. This splicing or connecting should be possible without an additional Adhesive done. That depends but from the band material. Cover strips often have several Layers on. If every outside of such a band is sealable, you can arrange the end edges of the band parts overlapping and through Heat exposure to heat.

Around Cover on open-topped containers to be able to although other properties, such as gas permeability, etc., an important Play role, multi-layered films or ribbons are produced. The underside of such a band can often not be with the top of the seal the corresponding other tape. The overlapping arrangement and the Applying heat does not allow the desired Connect.

After DE 101 46 448 For a label tape with adhesive self-adhesive labels, a splicing method is described in which the tape parts cut to form abutting edges transverse to the longitudinal or conveying direction and then arranged butt joint at a seam and connected by a separate tape. The adhesive tape is disadvantageously again a third, added agent, whereby the connection itself is already complicated and prone to failure. Nevertheless, in the industry, this connection has been used by means of adhesive tape in foil tapes whose one side can not be welded to the other.

However, the necessity of connecting tape ends is not only in the production in a packing machine, but also in the production of the film tapes themselves, for example, the cover tapes in question here to be able to wind this to a cover tape roll of sufficient size. Bonding with the separate adhesive tape is not heat resistant to the detriment of this process and the product made therewith. A splice made in this way holds the one present in the packing machine Temperature and voltage often do not stand. This leads to the very dreaded stoppage of the production machine. A particularly vulnerable place where in the packaging machine after the DE 196 54 373 described type is the sterile chamber, in which often dissolves the applied adhesive tape, so that sets several times a two to three hours continuous production failure.

Wanted to similar as with the narrow films or the normal films the layers Scrape off a tape roll end so far that the two tape roll ends overlapping again with the same materials can lay one another, then one would have to Remove bearing layers so that such a connection is not more secure and therefore unsustainable.

In greater quantity be covered with cover bands processed a special lid profile in the packaging industry. Because the upper layer of one end of the tape is not the lower Layer of the other band end is sealable, it has been thought one of the two band ends to rotate about the longitudinal axis of the band by 180 °, so that then sealable layers come to rest on each other. The stamped structure in the cover band, for example the special one Lid with a tab or transport or positioning holes (for example for Photocells), allowing processing while twisting the tape parts not too. Due to the stamped structures of such a band, especially cover band, the expert has the impossibility the twisting of one end to the other recognized.

In practice, one has therefore often worked with the separate, applied tape and thereby incurred extraordinary losses of tape material and temporary stoppage of the filling machine in purchasing. For example, if a bond was detected automatically, then it took time to close the cover strip on a machine after DE 196 54 373 completely across the filling machine, so that the splice was moved out of the processing area and tearing was prevented. This has led to a daily loss of several hundred lids.

Of the Invention is therefore the object of a method of the initially mentioned Art, a device of the above-described Arf and also a product, i. to create a cover tape with which it becomes possible the spliced Lid band without interruption of a subsequent processing continuously supply, so that downtime and waste are avoided.

The solution This object is achieved with a cover band of the type described above Kind in that the Band parts and the connecting element of the same strip material exist that is a sealable Layer, and that the facing each other sealable Layers of the bridging Connecting element and the band parts are sealed together. It has already been indicated above that the person skilled in the art is twisting the cover bands around its longitudinal direction 180 ° because of the special structure of the punch cuts was impossible. Nevertheless, it is surprising a cover band produced by connecting two band parts, which are both made of the same material and at least a sealable Have layer. Assign the two to be connected Band parts on both sides, i. on the upper surface as well on the lower surface, the same sealable Layer or sealable layers on, then you could on the one hand, an overlapping one Think arrangement; sure but could then without difficulty that the two band parts in the area of Seal the seam on the bridging connection element. But also for the case that that Band material only on one side has a sealable layer, succeeds Sealing the bridging Connecting element according to the teachings of the invention, as will be explained, so that above-indicated cover strip can be produced. This especially applies to Such a strip material, which according to the invention differs on its two sides, having non-sealable layers. One must oppose the concerns of the skilled person, the connecting element, which the same strip material as the strip parts to be joined, around its longitudinal direction rotate by 180 °, so again two layers which can be sealed together come to rest on each other.

It is in such a cover tape also possible that an intermediate layer of the Band material is an aluminum foil. It can be a very viable Create cover band, with the carrying capacity and tensile strength also guaranteed at the interface are.

specially is such a cover tape according to the invention Cheap producible in which a series of successive, spaced, pre-punched cover profiles are arranged. The new cover band according to the invention can therefore also carry a special or complicated structure of the die cuts, and yet it is a viable one Interface of two hinge parts accessible.

In an advantageous further embodiment of the invention, the contiguous to the abutting edges hinge parts ge by means of the cover strip holding lid, and at the interface overlying connecting element has recesses produced by pushing out of the lid with an outer contour corresponding to the cover profile. The joining of the band parts thus also succeeds in the case of a cover band having lids shaped in the described structure. But in particular results from the pushing out of the lid in the connecting element of the advantage that even the seam of the cover strip can be used in the downstream processing machine, as would pass through the cover strip at the interface without connecting element. If the cover were not pushed out and removed in the connecting element, then two overlapping covers would arise during subsequent processing in the region of the seam, which can not be processed. The machine is only designed for one single deco station per station. However, when the lid is pushed out of the connector and removed, only a single lid is offered to the machine and the machine can be operated continuously, even if it is a special or intricately shaped lid profile.

Especially Cheap it is when according to the invention in the Cover tape the covers in the band parts and in the connecting element have the same distance and if the length of the connecting element is equal to two recess diameter plus two intermediate bridges. For the Transporting the lid on it at the processing machine ultimately arrives alone, the cover band is used. This has outdoor areas and the lids. requires be for the processing only the lids. But they have to be transported and being held. For this you use the outer areas of the cover band. These consist of longitudinal edges and Between bridges. The longitudinal edges extend longitudinal the cover band, and the intermediate bridges extend transversely thereto and are each between two covers or pre-punched cover profiles, if the lids have not been pushed out yet. Is appropriate according to the invention make the connecting element only so long that two lids in a row Have space so that yourself Two recesses result when the lids are pushed out. The width of the connecting element is chosen appropriately equal to the Width of the cover band. For the length but suffice two recess diameter plus two intermediate bridges, of the latter an intermediate bridge in the Middle between the two recesses and one half intermediate bridge at the beginning and end of the longitudinal extension of the connecting element. Such a connecting element brings the necessary carrying capacity for the splice the two band parts on.

Advantageous it is according to the invention It also, when the sealing of the band parts with the connecting element only in the area of the longitudinal edges and / or the intermediate bridges outside the lid profiles done. By suitable design of the tool can be achieved that the Sealing two superimposed Layers exactly in the desired Areas and only in these. Then make sure that the lid, the be ejected from the connected band parts later, undamaged are and not undesirable Wear tracks ..

By but the invention is also a method for solving the above-mentioned problem created which is characterized in that the connecting element the same kind of strip material is produced by the strip material around 180 ° its longitudinal axis turned and provided by punching with the holes and cover profiles after which the strip material is cut to a length of two consecutive Cover across the longitudinal direction is cut off and the connecting element produced in this way the interface fit is sealed onto the cover band. The elongated band material has one Longitudinally with the conveying direction and thus also with the longitudinal axis the cover bands coincides. If you turn the strip material by 180 ° around this longitudinal direction, then you are the previously lowest layer at the top. Would you do the twisted band material put on the cover tape ends underneath, then layers would be made of the same material facing each other. You could then weld them too. before but will this twisted strip material with the necessary holes and lid profiles punched. You can even connect this band how to wrap the cover tape into a roll. Cut this one weblike Connecting material to the described length of two lids, then is the connecting element practically finished. By the method according to the invention So is the idea of turning around the asymmetrically constructed layer material taken up again, but with the difference to the conventional considerations, that after turning around, making the right materials in the right one Location, punching done with the holes and cover profiles.

By means of this very simple method, it is possible to arrange the same coatings on one another, with the result that sealing on connection of the two cover band ends is readily possible. A sealing site produced in this way is, contrary to the adhesive tape used in the prior art, insensitive to the high temperature in the sterile part of the processing machine. In addition, even the two cover located under the connection ver are used, so that the rejection rate is reduced to zero.

Of the Advantage of the further measure according to the invention, according to which in the manufacture of the connecting element, the lid for Formation of recesses has been issued above already explained. When you are in a filling machine also wants to use the junction, you need only one Cover. The ejected from the connecting element second cover is through the aforementioned measure according to the invention been removed. This is a continuous operation of the filling machine possible.

Concrete said, according to the invention in further Embodiment of the lower surface, namely the lower layer of the connecting element on the upper surface, ie the upper layer of the cover band placed. Both are but the same coatings and consist of the same strip material, so that one Sealing readily possible becomes.

By the separate punching and pre-punching of the band of fasteners in an analogous manner (optionally in the same punching machine) for Punching the band of lids come in the fasteners the holes and cover profiles in registration and congruent over the holes and cover profiles in the to be spliced band (cover band-) ends to lie.

With regard to the device of the type mentioned above, the object is achieved by the following measures:
A heating plate with at least the width of the cover strip and at least the length of the connecting element;
a positioning plate movable relative to the heating plate, with positioning pins protruding toward the heating plate, which are movable into receiving holes provided at corresponding positions in the heating plate;
Means for rotating the cover tape 180 ° about a longitudinal direction of the cover tape;
Cutting means for cutting the turned cover strip to about a length of two successive covers with intermediate bridges for the preparation of the connecting element and
Means for precisely fitting juxtaposition of the abutting edges of the band parts and the overlying connecting element under attachment to the positioning pins. The heating plate has blind holes for receiving the positioning pins, which protrude from the positioning plate, in their positions facing the positioning plate at suitable locations. It is expedient to complete the connecting element before juxtaposing the abutting edges of the band parts. By the appropriate means, the cover band is rotated through 180 ° about its longitudinal direction and then provided in the same manner as the cover band by punching with holes and cover profiles. It can be cut to length by the mentioned cutting blade this reversed rotated cover band, with a length of about two successive lids or cover profiles sufficient. Such finished fasteners could be stocked and then removed piece by piece to carry out the bonding process. But you can also set the cutting blade for the creation of the connecting element only in activity when the wall parts to be joined are already placed with their abutting edges, because only then the connecting element is needed.

By suitable means can be used to join the abutting edges of the Even fully automatically fit wall parts together in an exact fit, if For example, the laterally existing anyway transport holes for Plug on the positioning pins used. In appropriate Way, then the connecting element is placed over the seam. It is understood that the Heating plate is moved relative to the positioning plate and heat on transmits the connecting element and thus the sealing point, whereby with success the seal can be carried out. Then drive Hot plate and positioning plate apart again, and the band parts connected represent a continuous cover band, which also tensile through the sterile and on higher Temperature moving part of a processing machine moves through can be without tearing.

The Heating plate is preferably a spring-mounted, permanently heated Plate. It is stored in a joint and is over a Lever closed and opened. The contour of the cover of the cover strip is in the heating plate incorporated the positioning of the facing side. For this it is expedient if in a further embodiment of the invention, the heating plate in addition to the receiving holes for the Positioning pins, the above-mentioned blind holes, at least two circular-shaped, the Circular contour of the cover profiles corresponding depressions. If the cover profiles at one point of its circumference a radial have protruding tab, this needs in the circular disc-shaped depressions not considered to be. When moving together heating plate and positioning plate then the tabs are automatically disregarded.

It is also advantageous according to the invention, if at least two impact punches are provided which eject the lid in the production of the connecting element to form recesses. The finished connecting element be then stands, so to speak, only out of the frame, which surrounds the two recesses. The frame consists essentially of the longitudinal edges and the transverse thereto extending intermediate bridges. In the actual connection process, the connecting element is pressed onto the seam of the two band parts and sealed only in this frame part. As a result, a sufficient tensile force of the seam is achieved, so that after this splicing a continuous cover band (in some places with connecting element) can be rolled up or introduced into the machine tool.

in the Seam area is the overlapping Part by the juxtaposition of two bands, although thicker, in these but it is only the frame, i. the band rest in the processing machine is led out after ejecting the lid. The ejected in the processing machine lid itself consists only from a single material web.

Further Advantages, features and applications of the present Invention will become apparent from the following description in conjunction with the attached drawings. In these show:

1 schematically and partially broken off the cross-sectional view of a seam with a sealed onto the band parts to be joined fastener,

2 also schematically and broken off the strip material used with the various layers and

3 perspective and schematic two band parts to be joined together, a distance above arranged connecting element and the heating plate above and the positioning plate below.

The generally with 1 designated cover strips consist in the preferred embodiment shown here of a particular strip material whose five different layers in 2 show a slide below ( 2 ) with a sealable layer 2 is provided. In the splicing method, this sealable layer becomes 2 generally with 3 facing connecting element, which is why in 3 the sealable layer on the two lid bands 1 the upper layer is. Because the strip material for the production of the connecting element 3 180 ° around the longitudinal direction 4 turned around, comes the sealable layer 2 at the in 3 lying overhead connecting element below. Thus, the arrangement of the 3 the two sealable layers 2 opposite each other.

In which the cover bands 1 forming strip material are by punching punch holes and by pre-punching cover profiles 6 been created. The cover profile 6 is a broken line, not shown, cut line in a circle, which covers the lid 7 and a tab protruding outwardly at a location thereof 8th circulates.

In the 1 and 3 one recognizes that the overhead connecting element 3 only recesses 9 (lidless 7 ), because the lids have been previously ejected and removed by not shown bumpers.

The exemplary structure of a cover strip 1 according to the greatly enlarged representation of 2 has in addition to the sealable PE layer on four more layers. In 2 this is in the order from bottom to top next to the sealable PE layer 2 around a polyester layer 10 , an aluminum foil 11 , a layer 12 made of foamed polypropylene and top (in 2 ) a polyester layer 13 , In the embodiment chosen here, the polyester layer is 13 12 μm thick, the layer 12 made of foamed polypropylene 120 μm thick, the aluminum foil of the layer 11 is 25 μm thick, the polyester layer 10 is 12 μm thick, and the sealable PE layer 2 is 60 μm thick. It can be seen that the polyester layer 13 not with the PE layer 2 can be sealed by applying heat.

For splicing the beginning of the tape 14 a not shown new cover tape roll with the expiring tape end 15 a spent lid tape roll, also not shown, are both transverse to the longitudinal direction 4 for the formation of abutting edges 16 cut. You will then be at the general with 17 designated joint is positioned abutment, as best shown in the schematic representation of the 1 sees.

The connecting element 3 was made of the same kind of strip material with a construction as above in connection with 2 has been explained, manufactured by that this strip material around the longitudinal direction 4 180 ° relative to the cover band 1 is rotated, in which case the holes 5 for transport and cover profiles 6 be introduced, which, as you can clearly see 3 looks, congruent with the holes 5 and cover profiles 6 the cover band 1 are.

Although you could use the connecting element 3 to a length L of 3, 4, 5 or more consecutive lids 7 cut to length, for the desired connection of the two band parts 14 . 15 with sufficient However, the tensile strength satisfies a length L of two successive lids 7 with the intermediate bridges 18 ,

The width of the cover bands 1 and also the connecting element 3 becomes transverse to the longitudinal direction 4 measured. Preferably, the cover bands 1 and the connecting element 3 the same width.

In 3 Parts of the device are shown schematically, in particular the top of the connecting element 3 arranged heating plate 19 and under the lid bands 1 arranged below positioning 20 .

From the more or less cold positioning plate in operation 20 Stand up to the hotplate 19 eight positioning pins 21 out, which into the transport holes 5 the cover bands 1 On the other hand, and the connecting element on the other hand can be inserted in register. If you put the beginning of the band 14 of in 3 left cover band shown 1 and the end of the tape 15 the right arranged other cover band 1 Push on push at the seam 17 on the positioning plate 20 , then these are two cover bands 1 fitted together in an exact fit. Accordingly, over the upstanding positioning pins 21 the connecting element 3 with his holes 5 also be placed in registration.

The then still sticking out positioning pins 21 protrude into receiving holes 22 , posing as blind holes in the heating plate 19 open downwards towards the positioning plate. These recording holes 22 are also fitting over the holes 5 in the so-called longitudinal edge 23 or the two longitudinal edges 23 , because on the positioning plate 20 two rows of positioning pins 21 lie opposite, are also in the hot plate 19 two rows of receiving holes 22 across from.

About the cable 24 be in the hot plate 19 not shown heating elements supplied with energy to the heating plate 19 to bring to the necessary temperature for sealing. With the temperature sensor 25 is the temperature of the heating plate 19 measured. This temperature display can be used with an automatic temperature control machine.

The means known per se to the heating plate 19 relative to the positioning plate 20 moving together and apart are not shown. The person skilled in the art also knows which means he uses to turn the cover band 1 180 ° around its longitudinal direction 4 must use. Likewise, cutting blades for cutting the turned-around cover band 1 to about a length L of two successive lids 7 with intermediate bridges 18 not shown, but the preparation of the connecting element 3 appears sufficiently explained by the above description.

In operation, an unillustrated roll of a twisted cover tape (band of fasteners) is first produced, the "lower" side of which in the example mentioned here (after rotation) being the sealable layer 2 wearing. By punching holes or profiles were or cut into the band of fasteners. In a preferred embodiment, a connecting element 3 after the other by cutting to length L and prepared in stock.

For joining or splicing two cover bands, the beginning of the tape is first 14 a new cover band 1 and the expiring end of the tape 15 a spent cover band 1 transverse to the longitudinal direction 4 under formation of abutting edges 16 cut.

On the positioning plate 20 or their positioning pins 21 then become the beginning of the band 14 and the end of the tape 15 the cover bands 1 Push on push to form a seam 17 hung up. According to an exact fit a connecting element 3 hung up after having previously used the lids 7 pushed out by push punches. It then arise the position of 1 and in the extended state, the position of the 3 ,

Thereafter, via the mentioned and not shown here, the lever located on sealing temperature heating plate 19 on the positioning plate 20 pressed so that the two opposite sealable layers 2 be welded together.

The finished product is in function and effect equal to a continuous cover band 1 , which can be fed into a processing machine and processed there completely while avoiding any committee.

1

cover band

2

sealable layers

3

connecting element

4

longitudinal direction

5

Holes for transport

6

cover profiles

7

cover

8th

flap

9

recesses

10

polyester layer

11

interlayer (Aluminum)

12

layer made of foamed polypropylene

13

polyester layer

14

band part

15

band part

16

abutting edges

17

join

18

Zwischenbrücken

19

heating plate

20

positioning

21

positioning

22

receiving holes

23

longitudinal edges

24

depressions

Claims (13)

Cover tape ( 1 ) with an interface ( 17 ), at which the abutting edges ( 16 ) of two band parts ( 14 . 15 ) are joined together, and with a connecting element bridging the two band parts ( 3 ), through which the two band parts ( 14 . 15 ), characterized in that the band parts ( 14 . 15 ) and the connecting element ( 3 ) consist of the same strip material which has a sealable layer ( 2 ), and in that the sealable layers facing each other ( 2 ) of the bridging connection element ( 3 ) and the band parts ( 14 . 15 ) are sealed together. Cover tape ( 1 ) according to claim 1, characterized in that the strip material has on its two sides different, non-sealable layers ( 2 . 13 ) having. Cover tape ( 1 ) according to claim 1 or 2, characterized in that an intermediate layer ( 11 ) of the strip material is an aluminum foil. Cover tape ( 1 ) according to one of claims 1 to 3, characterized in that it comprises a series of spaced successive, pre-punched cover profiles ( 6 ) having. Cover tape ( 1 ) according to one of claims 1 to 4, characterized in that the at the abutting edges ( 16 ) adjacent band parts ( 14 . 15 ) by means of the cover band ( 1 ) held lid ( 7 ) and that at the interface ( 17 ) overlying connecting element ( 3 ) by pushing out the lid ( 7 ) generated recesses ( 9 ) with a lid profile ( 6 ) has corresponding outer contour. Cover tape ( 1 ) according to one of claims 1 to 5, characterized in that the lids ( 7 ) in the band parts ( 14 . 15 ) and in the connecting element ( 3 ) the same distance and that the length (L) of the connecting element ( 3 ) equal to two recess diameter plus two intermediate bridges ( 18 ). Cover tape ( 1 ) according to one of claims 1 to 6, characterized in that the sealing of the strip parts ( 14 . 15 ) with the connecting element ( 3 ) only in the area of the longitudinal edges ( 23 ) and / or the intermediate bridges ( 18 ) outside the cover profiles ( 6 ) he follows. Method for positionally accurate connection of cover strips ( 1 ) made of strip material, in particular of sealable material (layer 2 ) coated film, in which strip material holes ( 5 ) for transport, for positioning, etc., and decorative profiles ( 6 ) are pre-punched in the cover band ( 1 ) are held by means, in particular webs, in which method the beginning of the strip ( 14 ) a new cover tape roll and the expiring tape end ( 15 ) of a spent lid roll between two on the tape ( 1 ) successive lid profiles ( 6 ) transverse to the longitudinal direction ( 4 ) of the web to form abutting edges ( 16 ), at the interface ( 17 ) Butt-jointed and with a connecting element ( 3 ), characterized in that the connecting element ( 3 ) is made of the same kind of strip material, that the strip material by 180 ° about its longitudinal direction ( 4 ) and by punching with the holes ( 5 ) and cover profiles ( 6 ), after which the strip material is reduced to a length (L) of two successive covers ( 7 ) transverse to the longitudinal direction ( 4 ) is cut off, and the connecting element ( 3 ) at the interface ( 17 ) on the lid tape ( 1 ) is sealed. Method according to claim 8, characterized in that in the production of the connecting element ( 3 ) the lids ( 7 ) for the formation of recesses ( 9 ) are ejected. Method according to claim 8 or 9, characterized in that the lower surface of the connecting element ( 3 ) on the upper surface (layer 2 ) of the cover band ( 1 ) is placed and sealed. Device for the positionally accurate connection of cover strips ( 1 ), which are at an interface ( 17 ) abut one another with their abutting edges, a sealable layer ( 2 ) and a series of spaced-apart, pre-cut lid profiles ( 6 ), with the help of one at the interface ( 17 ), also a sealable layer ( 2 ) having connecting element ( 3 ), characterized by a heating plate ( 19 ) with at least the width of the cover strip ( 1 ) and at least the length (L) of the connecting element ( 3 ); a relative to the heating plate ( 19 ) movable positioning plate ( 20 ) with to the heating plate ( 19 ) protruding positioning pins ( 21 ), which are located in corresponding places in the heating plate ( 19 ) mounted on sewing holes ( 22 ) are movable into it; Means for rotating the cover band ( 1 ) by 180 ° about a longitudinal direction ( 4 ) of the cover band ( 1 ); Cutting knife for cutting the turned cover band ( 1 ) to about a length (L) of two successive lids ( 7 ) with intermediate bridges ( 18 ) for the production of the connecting element ( 3 ) and means for precisely fitting the abutting edges ( 16 ) of the band parts ( 14 . 15 ) and the overlying connecting element ( 3 ) while putting on the positioning pins ( 21 ). Device according to claim 11, characterized in that the heating plate ( 19 ) next to the receiving holes ( 22 ) for the positioning pins ( 21 ) at least two circular disk-shaped, the circular contour of the cover profiles ( 6 ) corresponding depressions ( 24 ) having. Apparatus according to claim 11 or 12, characterized by at least two punches.