DE19804876A1 - Process and device for thermoforming and applying decorative tape - Google Patents

Description

The present invention relates to a method for producing containers thermals and attaching decorative tapes to these containers, in a way that progressively advances thermoplastic shear strip is heated, with in each of the thermoforming chambers with min At least a number of thermoforming chambers is provided with a decorative tape that is cut from a strip of decorative tape, and in each chamber from each Section of the thermoplastic strip called "container position" is a container is thermoformed.

In known methods of this type, each advance corresponds to the thermopla strip of production of one or two rows of containers. More classic a process follows the process immediately after the container is manufactured, in which a product falls into the container, such as a yogurt, a few steniform product, a liquid or gelatinous product, furthermore a Phase in which lids are placed on the containers and a phase in which the containers of the thermoplastic coating sealed with the lid fen be cut, in such a way that individual containers or Receives groups of several containers. Allow in these known methods in this way the phases in which the containers fell, the lids indicated brings and the containers are cut off, only one or at the same time to process two rows of containers with a decorative band.

This is due to the fact that it is required to make a decorative tape to be able to attach the containers around, on at least one side in the Heat molding station processed row to have enough space to decorate to feed tape strips from which the decorative tapes are cut off. If for example a step of feeding the thermoplastic strip of the processing device corresponds to two rows of containers, namely a row in front and a row behind, the decorative tape strips for the containers of the row in front of it from the front side of this row, and the De Basket tape for the containers in the row behind from the rear drove to this series. Given the space requirements of the molds in which the mold chambers are attached, and if you have three or more rows of containers at the same time thermoforming, you would not have enough space to store the De to feed the straps of the row or rows between the other two ren is or are located. This limitation on the number of containers  series that can be processed at every step of the machine feed slows down the production speed.

Other known methods use two mold blocks on one Drum or a similar equivalent are mounted. To a given At this point, only a first block is used to heat the containers men, while the second block is from the distance of the thermoplastic streak fens is located, which makes it possible in the thermoforming chambers of this second Blocks to provide decorative tapes. The next step is the drum actuated to position the second block on the path of the strip and to use it to thermoform containers during the first block of its is removed from the thermoplastic strip and ver with decorative tapes will see.

These other methods make it possible to measure the Ma seem to process a number of rows of containers that are over 2 (for example 4). However, they had the major disadvantage of using two Assume mold blocks (which in total is twice the number of heat molds represents chambers that are normally needed), and especially for everyone Cycle an actuation of the drum to move the two mold blocks make it necessary, given the fact that these blocks are bulky and heavy-weight parts, the space required by the thermoforming station significantly increased and the production speed of the machine reduced.

The present invention aims to provide an improved method that does not have the disadvantages mentioned above, while at the same time allowing in Following the molding phase to process a number of rows of containers that two lies (traditionally an even number of four, six or eight).

This goal is achieved due to the fact that the said thermoplastic cal strips by one for each feed step of this thermoplastic strip Is moved forward, which corresponds to the production of kn rows of containers, where k and n are integers over 1, and due to the fact that a Heat forming station is used, which extends over k feed steps of the thermopla stripes and contains k heat molds, each individually contains n rows of chambers, with a space in front of or behind each chamber is seen, and due to the fact that at each of these heat levels Decorative tape in each of the chambers of the appropriate heat level ge ready is placed, with the decorative tapes being cut from a decorative tape strip  the one that is fed through the space provided for each chamber, and n Rows of containers are thermoformed, which are provided with decorative bands, as well due to the fact that the k heat levels are arranged so that for each not thermoformed container position of the thermoplastic strip on a ge Given the heat level, a chamber is present that is exposed to a heat is located in the form, which lies behind the said heat form, and in the Container is thermoformed at that position.

It will be understood that in the process of the present invention the Phase of the thermoforming of the containers and the provision of a decorative tape is realized simultaneously with the heat molding in several steps. With him The first step at the first heat level is only n rows of containers forms, which are arranged so that a space before or after each row to Ver is available to allow the supply of one decorative tape strip per chamber chen. In the second step, n further rows (which have not yet been processed had been processed) in the same way. The process is on continue this way until the last n rows at the kth heat level are processed. As far as the heat forming station over k feed steps Machine extends and to avoid that this thermoforming station too large Having dimensions, a number is preferably chosen for k that is equal to two or three. The number for n is itself classically 2, 3 or 4.

When leaving the thermoforming station, kn is thermoformed containers with a decorative band, and each of the subsequent phases (Filling, sealing with cover and cutting the container) can be done by everyone Feed the thermoplastic strip through simultaneously with kn containers be performed. So if, for example, both k and n are two is selected, the production speed is compared with the classic process ren doubled, which allows only two rows of containers in the heat form station and to be provided with a decorative tape.

It should be noted that, in accordance with the procedure of Present invention is not necessary, the heat levels obliquely to the front shift direction of the thermoplastic strip, and that the total Number of thermoforming chambers used is equal to the number of each step processed container.

According to a first variant, in which an even number is chosen for n the chambers in each of the k heat levels on n / 2 groups of  two rows arranged side by side, and the k heat resistance levels who the arranged so that for each of the chambers that give a certain heat formstand belong to, a chamber is present that leads to another heat form was heard, which is one distance from the chamber in question, the pretty much the same (1 + 2 / kn) times the feed step of the thermoplastic strip is.

By choosing n / 2 adjacent row groups on each The k heat mold stands have the necessary space for closing guidance of the decorative tape strips, because for the row in front of each group you can use the Feed decorative tape strips from the front, and for the row behind each Group you can feed the decorative tape strips from the back. Self ver of course remain at a given heat level between each of the n / 2 Groups with two rows at least two unprocessed rows. If k and n For example, if they are equal to 2, the first step is to use the first container Group with two rows, namely row 1 and row 2 thermoforming and with a decorative tape while changing the positions of the thermoplastic Strip that corresponds to rows 3 and 4, unprocessed. The containers of this Rows 3 and 4 are heated in the second step at the second heat level forms and provided with a decorative band in which the containers of the Rows 1 and 2 are located, which are already thermoformed and ver with a decorative tape have been seen.

According to a second variant, the chambers in each of the k Heat levels in n rows of chambers not adjacent to each other orders, and the k heat levels are also arranged so that for Each chamber that belongs to a certain heat level has one chamber is present, which belongs to another form of heat, that of the concerned Chamber is a distance that is approximately equal to (1 + 1 / kn) times the previous thrust step corresponds.

This second variant allows, for example, if k is 2 and n selects three, six rows of containers per feed step of the thermoplastic Strip by using a heat molding station, the two Contains heat levels and only two feed steps of ther stretching plastic strip (preferably k is equal to 2). To do this, For example, the containers in the rows 1, 3 and 5 at the first heat molding stand thermoformed and with a decorative band, while the positions of the  thermoplastic strips, which correspond to rows 2, 4 and 6, unprocessed ge be let. The containers of these rows are at the second heat molding stand 2, 4 and 6 thermoformed and provided with a decorative band while the containers series 1, 3 and 5 are already thermoformed and provided with a decorative band have been. The subsequent phases of the process (filling, closing with Capping and cutting) are carried out at every feed step of the thermoplastic Strip with six rows of containers at the same time.

Of course, the method can be according to the first or two This variant can also be used to add eight rows of containers per feed step machine. To achieve this, use the corresponding the first variant, for example the first heat level, around the rows of containers 1, 2, 5 and 6 to be thermoformed and provided with a decorative tape, and the second Heat level to thermoform the container rows 3, 4, 7 and 8 and with egg to provide a decorative tape. According to the second variant, you can choose rows 1, 3, 5 and 7 at the first heat level and at the second heat Process form rows 2, 4, 6 and 3.

Preferably, each of the k-1 heat molds that are in front of the heat the most distant rear, which is not yet warm molded positions of the thermoplastic strip at heat molding temperature hold. In fact, the thermoplastic strips traditionally need to be one brought high temperature to be thermoformed without difficulty to be able to. The heat retention makes it possible to avoid that on one front heat level not processed sections of the thermoplastic The strip does not cool down, which means its heat shaping on a back would be difficult to make

The present invention also relates to a device for Manufacture of containers by thermoforming and decorating tapes on these containers, this device containing devices to to progressively advance a thermoplastic strip, devices for heating said thermoplastic strip, a thermoforming station, which contains at least one row with thermoforming chambers, devices for Cutting decorative tapes from decorative tape strips, devices for attaching them bring a decorative tape in each heat molding chamber as well as devices for Thermoforming a container in each chamber from a section of the thermopla tical strip, which is called "container position".  

The first known devices of this type allow the thermoforming state to process only one or two rows of containers in order to heat them at the same time to shape and to provide with a decorative tape. As previously mentioned de, is based on the need to add only a small number of rows of containers process, based on the fact that the supply of decorative tape strips in the area the thermoforming chambers require a sufficient space, which in the case the heat molding station has three or more heat molds lying next to each other rows of chambers would not be available, what the inner Kam mer rows that are between the two outer rows. The be knew facilities that allow to simultaneously thermoform containers and to provide a decorative tape, therefore, have a reduced capacity and he do not allow to achieve production speeds that compare with those are bar that can be obtained in facilities without decorative tape, in which the Thermoforming station traditionally 4, 6 or 8 rows with thermoforming chambers contains, which makes it possible at every feed step of the thermoplastic Strip and 4, 6 or 8 Be at the same time in each heat molding station of the facility to process rows of containers.

Other facilities that are able to verse four with a decorative tape Processing rows of containers contain two molds in the thermoforming station blocks, each with four rows of thermoforming chambers. These two Blocks are attached to a drum or an analog equivalent, each at the cycle is operated to position a block on the path of the strip tion and remove the other block in order to add decorative ribbons to the To attach chambers that the block contains, and vice versa.

These facilities are costly because they have twice as much heat contain chambers, such as the facilities without decorative tape, which over the have rich capacity, and because devices for moving these blocks, which must be synchronized with the feed of the strip must be asked.

The present invention aims to overcome these disadvantages and one To offer facility that has a capacity that is the same or pretty much the same the capacity of the devices without decor tape is to the manufacturer increase the rate of flow.

This goal is achieved due to the fact that if k and n are whole Numbers are over 1, the thermoforming station is over k feed steps of ther  extends the plastic strip and contains k heat forms, each one individual heat mold level has n rows with heat mold chambers, whereby a Free space is provided in front of or behind each chamber, furthermore due to the The fact that the device contains devices around a decorative tape strip to lead at least in the vicinity of each chamber, namely by the for the respective space provided, as well as devices to enter each chamber To attach decorative tape and cut this off each decorative tape strip, white terhin due to the fact that each heat level ver ver devices inserts to thermoform a container in each of the chambers that heat that formstand contains, and due to the fact that the k heat form levels so are arranged that for each container position of the thermoplastic strip, the has not been thermoformed at a certain front heat level, a chamber and thermoforming devices at a thermoforming stand those who are behind this specific heat level and which are suitable are to thermoform a container at the appropriate position.

Because of these arrangements, following the heat form stati on kn container thermoformed and provided with a decorative tape so that the Kapa unit in every feed step of the thermoplastic strip the stations behind the thermoforming station kn container (for example one Filling station, a station for positioning and closing lids and one Station for cutting the containers from the thermoplastic strip). On he Most heat mold level of the heat molding station warms n chamber areas forms and provided with a decorative tape by feeding the decorative tape strips from which the decorative tapes are cut off, which uses free spaces that are intended for each individual chamber. On the respectively at the subsequent heat mold stands, those at the first heat mold stand unprocessed container positions processed in the same way.

It should be noted that the heat molding station overall over the same che number of thermoforming chambers, like a facility without decor with the same capacity and that it is not necessary during the production the mold blocks of the heat mold stands transversely to the front to move the thermoplastic strip.

According to a first variant, in which n is an even number, everyone contains Heat level of the heat molding station n / 2 groups with two lying side by side rows of thermoforming chambers, and the k thermoforming stands are arranged so  that for each chamber belonging to a certain heat level, a wide one re chamber is present, which belongs to a different heat level and which from the chamber in question by a distance that is fairly accurate equals (1 + 2 / kn) times the feed step of the thermoplastic strip.

For example, one can choose n and k equal to 2. In this case there is at the first heat molding stand, a first group of a first and a second Heat molding chamber series, which makes it possible to have a first and a second loading to thermoform the row of containers and to provide them with a decorative band while the Container positions corresponding to the third and fourth rows on this one Most heat level is not processed, but only on the second heat form stand. If n and k are 4 and 2, the first contains Heat form level a first group that has a row i and a row 2, as well as a second group, which has a row 5 and a row 6, while the second heat level contains a third group, which over a row 3 and a row 4, and a fourth group that has a row 7 and a row 8 has. Each group remains on the front of a first Row (1, 5, 3, 7) and on the back of a second row (2, 6, 4, 8) one free room in which there is no heat molding chamber so that the decorative tape strips can be supplied.

According to a second variant, each heat level has Heat forming station over n rows of chambers not lying next to each other, and the k Heat mold stands are arranged so that for each of the chambers that lead to a agreed heat level, there is another chamber that is to egg heard another form of heat, that of the chamber concerned by one Distance is, it is almost exactly the same (1 + 1 / kn) times the feed step corresponds.

According to this second variant, n can be 3 and k can be 2 choose. In this case, the first heat level can be a row 1, a row 3 as well as a row 5 with thermoforming chambers, with no heat molding chamber located at this heat level in the areas that line up 2, 4 and 6 correspond. Only at the second heat level are the areas that correspond to these areas 2, 4 and 6, equipped with a thermoforming chamber The areas corresponding to rows 1, 3 and 5 did not come into heat form have.  

Preferably, each of the k-1 contains heat molds that precede the heat form position, which is the furthest back, devices to the Posi tions of the thermoplastic strip which has not yet been thermoformed on thermoform maintain temperature.

This arrangement makes it possible to ensure that those areas of the thermoplastic strip, which are provided at a thermoforming stand thermoformed behind the thermoforming station and provided with a decorative band are maintained at a temperature when entering this stand, the problem-free Thermoforming of these areas of the thermoplastic strip allowed.

The present invention is well understood and its advantages will become more apparent upon reading the following detailed description in which exemplary and non-exhaustive implementations are shown. The description refers to the drawings in the appendix, on which:

• Represents the Figure 1 is a schematic view of a device according to the present invention in elevation, -.
• - represents the figure 2 in an extremely schematic way, the implementation of the first variant of the method according to the present invention and the device according to the first variant.
• - Fig. 3 shows the implementation of the method according to the second variant and the second variant of the device in an extremely schematic manner,
• -. 4a is a top selected view illustrating the Fig of a thermoplastic strip, during the heat molding, while Figure 4b to guide the decorative tape strip under the heat chambers of the device is, by passing the thermoplastic stripe.
• - Figs. 5a to 5e show five successive phases of heat shaping and decor tape attachment,
• - Fig. 6 is a partial view as a section in a plane corresponding to the plane VI-VI of Fig. 5a, and
• - Fig. 7 is an axial section of VII-VII of Fig. 6.

The device of Fig. 1 is used to thermoform containers 1 from a thermoplastic strip 10 , to fill these containers with a product such as a liquid, pasty or gelatinous product (in particular a food product) and to seal the filled containers.

This device includes a roll 12 on which the thermoplastic strip 10 is rolled, which generally runs horizontally through the entire device, being gradually conveyed by support and conveying devices (not shown here). Then the direction from the front to the rear, which is represented by the arrow F, is to be understood such that it denotes the direction of advance of the thermoplastic strip through the different successive stations of the device.

In this way, this device includes in the direction of arrow F a heat box 14 , which serves to bring the thermoplastic strip fen to heat molding temperature, a heat molding station 16 , in which the containers are thermoformed and provided with a decorative band, one Dosing and filling station for the containers 17 and a station for closing the containers 20 , in which a strip with lids 22 is provided at the upper open end of the containers and sealed / sealed at the edges of these containers with the aid of a sealing / sealing tool 24 . Behind this station 20 , the device classically includes a station for cutting the containers from the thermoplastic strip, and then a pallet packaging station for the containers which have been cut in groups or individually.

The heat box 14 is interrupted in Fig. 14. It usually extends over several feed steps of the thermoplastic strip. The device shown as an example serves to process four rows of containers simultaneously in the stations 17 and 20 , which are located in front of the heat molding station. Therefore, the manufacturing speed of this device is four rows of containers per feed step of the thermoplastic strip.

In the present text the expression "means a container with a De provide a decorative band "around the wall of a container and attach this decorative tape to this wall. Classically, a De Basket tape cut from a strip of paper tape or an analog equivalent ten and glued to the wall of the container due to the fact that its inside surface is covered with a heat-adhesive material that is protected by the thermopla is heated material in which the container ge in the heat molding chamber is formed.

The thermoforming station extends over two feed steps of the thermoplastic strip. Therefore, the two integers k and n, which were referred to at the beginning of the present text, are both the same in FIG. 1. The thermoforming station therefore contains a first thermoforming station 18 which has a first and a second row, R1 and R2 contains with thermoforming chambers. These rows lie side by side and can therefore be realized in the same lower mold block 20 . Above block 20 there is an upper block 22 which contains as many sliding pistons 24 as block 20 contains thermoforming chambers. The thermoplastic strip 10 thus passes between the lower blocks 20 and the upper blocks 22 , and for thermoforming, each piston 24 descends from its upper position where it releases the thermoplastic strip feed until it releases reached a lower position in which it penetrates into a corresponding chamber in order to mechanically deform the thermoplastic strip, which is then thermoformed by compressed air. In order to provide the containers thermoformed in the first row R1 with a decorative tape, the decorative tape strips 26 of a first series of decorative tape strips are moved through an empty space 19 in front of the chambers of this row at least up to the thermoforming chambers of the row R1. In order to provide the thermoformed containers in the chambers of the R2 series with a decorative band, the decorative strip strips 27 of a second series are conveyed from the front side of the R2 series chambers through the free space 21 at least to these chambers. In the example presented, the free spaces 19 and 21 are obtained , which allow the supply of a decorative tape strip for each chamber of the rows R1 and R2, in a simple manner due to the fact that no thermoforming chamber next to the chambers of the R1 series before this latter lies, and that no Wärmformkam mer is next to the chambers of the series R2 behind this latter.

The heat molding station contains a second heat molding stand 28 analogous to the first stand 18 .

At a certain stopping position of the thermoplastic strip, there are four rows of container positions at the same time in the first thermoforming station 18 of the thermoforming station 16 , of which only two rows (the first two rows in our example) lie in the region of the upper and lower mold blocks and are intended to be in the R1 and R2 chamber rows to be thermoformed. The subsequent rows of the thermoplastic strip are not thermoformed at the first stand 18 , but only in the thermoforming chamber rows R3 and R4 of the second thermoforming stand 28 as soon as they arrive at this thermoforming stand.

In order to avoid that the two rows of container positions that were not molded at the first heat molding stand 18 cool down at this heat molding stand, the latter contains a box 30 which keeps these two rows warm. At the two gene heat mold 28 of the heat molding station, the two rows of containers already thermoformed at the first heat mold 18 are not subjected to any processing.

Following the thermoforming station, four rows of containers can be processed simultaneously in each subsequent station of the facility. Therefore, the metering and filling station 17 contains four metering rows 17 a. Likewise, the station for positioning and for closing a lid strip on the containers is arranged in such a way that the lid strip 22 can simultaneously be placed and closed on the edges of the containers by four rows of containers lying next to one another.

Fig. 2 shows in a very schematic manner the implementation of the method of the present invention according to a first variant, which implementation is suitable to be realized with the aid of the device of Fig. 1. In this figure, as well as in Fig. 1, the thermoforming station extends over a total of two feed steps of the thermoplastic strip, the number k above being consequently equal to 2. For simplification, the heat levels of this heat molding station are only shown schematically by the lower mold blocks that contain them. The first heat mold stand 38 allows the containers of a first group of two container rows to be thermoformed and provided with a decorative band, two heat mold chambers C1 and C2 lying next to one another being shown. The second heat mold stand 48 in turn allows two further rows of containers not processed at the heat mold stand 38 to be thermoformed, two heat mold chambers C3 and C4 being shown at this heat mold stand. At the first thermoforming stand 38 , which is in front of the thermoforming stand 48 , the positions of the not yet thermoformed thermoplastic strip are kept at the thermoforming temperature by means of heat retention devices 30 . Under these devices 30 there is a space 49 for the supply of the decorative tape strips to the chambers, which belong to the same row as C2.

In order to ensure that the second heat stand 48 thermoformed are not processed on the first heat stand 38 rows of containers and be provided with egg nem decorative strip, the two heat supernatants are so angeord net that is one for each of the chambers C1 and C2, respectively, which was for the first heat 38 , A chamber C3 or C4 is present, which belongs to the heat molding stand 48 and is from the relevant chamber (C1 or C2) by a distance d1, which is approximately equal to one and a half times the advance step p of the thermoplastic strip. K and n were chosen equal to 2 ge, so that this distance d1 (1 + 2 / kn) times corresponds to step p. This is also the case with the arrangement of FIG. 1, since the chambers of the row R1 are at a distance d1, which is equal to one and a half times the step p, from the chambers of the row R3, and the chambers of the row R2 by same distance d1 from the chambers of the R4 series.

If one would prefer the same variant, two wares to use molds that came in two groups from two heat molds contain rows, whereby these rows are not next to each other, one could in Process eight rows of containers at the station, by making sure that each cam mer of a row of the first heat level of a chamber of a row of the two corresponds to the shape of the heat which is a distance from the first, which is equal to one and a quarter times the feed rate of the thermoplastic Strip is. It would therefore be easy to find the formula again, according to the the distance between a chamber of the first heat level and an ent speaking chamber at the second heat level equal to (1 + 2 / kn) times the previous push step is.

Fig. 3 shows the second variant of the method and the device. In this figure, the numbers k and n were chosen to be 2 and 3, respectively. The heat molding station consequently contains two heat mold stands, the heat mold stand 58 and the heat mold stand 68 . At the first thermoforming station 58 , the thermoforming chambers C'1, C'3 and C'5 are arranged over three rows of chambers which are not adjacent to one another, that is to say that there is between the chambers C'1 and C'3 on the one hand and between the chambers C'3 and C'5, on the other hand, gives a free space ( 59 , 59 ') in which there is no heat molding chamber. In order to lead a decorative tape strip to the chamber C'1, for example, the free space 59 between the rows of the chambers C'1 and C'3 (or the space in front of the chamber C1) is used, while for feeding a decorative tape strip Chamber C'3 the free space 59 'is used, which is arranged between the rows of the chambers C'3 and C'5 (or the space 59 ), and to supply a decorative tape strip to the chamber C'5 the free space 59 '' used, which is arranged behind the row with the chambers C'5 (or the free space 59 '). The container positions, which are located above the spaces 59 , 59 'and 59 '', are advantageously kept at the thermoforming temperature with the aid of the heat retention devices 30 '.

The second heat mold stand 68 contains three non-adjacent rows of heat mold chambers, namely C'2, C'4 and C'6, the chamber C'2 being used to heat-mold containers in those container positions that were in the free space 59 , when the thermoplastic strip was at the first heat level, while the chambers C'4 and C'6 each serve to thermoform those containers which were at the heat level 58 above the spaces 59 'and 59 ''. The containers previously thermoformed in the chambers C'1, C3 and C5 and provided with a decorative band are not subjected to any processing at this second heat molding stand 68 . The heat station of Fig. 3 extends over two advance steps of the thermoplastic strip, while the first and the second heat Stand 58 and 68 each extend over a feed step. In order to ensure that the first heat mold stand 58 not thermoformed container positions at the second heat mold stand 68 are thermoformed, the chambers are from the two heat mold stands by a distance which depends on the other. In this way, the row with the chambers C'2 of the second heat mold, which is intended to thermoform those container positions that are above the free space 59 when the thermoplastic strip is at the first heat mold stand, from the row of Chambers C'1 by a distance d'1 equal to 1 + 1/6 times p '. Likewise, the rows of chambers C'4 and C'6 are separated from the rows of chambers C'3 and C'5 by the same distance d'1. K and n were chosen equal to 2 and 3, respectively, so that the distance d'1 is equal to (1 + 1 / kn) times the feed step.

In the following, Fig. 4a and 4b are described which allow to understand the supply of the decorative tape strip under the thermoplastic strip in the heat-forming station better. The example shown corresponds to an order that can be used in the establishment of Fig. 1. Fig. 4a shows in a very schematic manner the thermoplastic strip 10 as seen from above while it is being fed in the direction F over the device. At the time shown, the section 70 of the thermoplastic strip is at the first heat molding stand 18 , while that is immediately before it lie de section 72 is still in the heat box 14 , and the immediately lying section 74 is located at the second heat mold 28 . The length of a feed step of the thermoplastic strip corresponds to four rows of containers. At the first heat mold stand in section 70 , two adjacent rows with six containers 76 and 78 are thermoformed, while the section 73 of the thermoplastic strip behind the row 78 , which extends over a width that corresponds to two rows of container positions, is kept at temperature in the heat box 30 becomes. In the subsequent step, section 70 of the thermoplastic strip takes the place of section 74 at the second heat mold 28 . The two rows 76 and 78 with the already thermoformed container are not processed, while two adjacent container rows 80 and 82 are thermoformed in section 73 of the thermoplastic strip. In all subsequent steps of the setup, the rows 76 , 78 , 80 and 82 are processed each time at a single processing stand as four rows of containers lying side by side (dosing, filling, closing with lids and so on).

In Fig. 4b it is understood that the decorative tape strips fed to the first heat mold stand 18 are unwound from a roll 90 and then cut in the longitudinal direction and are guided to the first heat mold stand using a system of successive deflection drums (not shown here). The decorative tape strips are fed separately on a horizontal plane and in a vertical position (under the thermoforming chambers), which enables the decorative tapes to be directly implemented and attached in a manner which is described in more detail below.

In order to provide the container of the row 76 in the row R1 of the chambers in Fig. 1 with a decorative tape, it is clear that the decorative tape strips 26 a to 26 f, which are cut off from a first half of the strip rolled up on the roll 90 , are guided under the chambers of the row R1 by using a free space 19 which is available on the side in front of this row. As can be seen in Fig. 1, only the heat box 14 is in front of the row with the chambers R1, so that this area of the device does not contain a space-taking component under the strip, which would hinder the supply of the decorative tape strips 26 a to 26 f . The latter can therefore, while they are passed under the box 14 , be guided to the chambers of the row R1. The decorative tape strips 27 a to 27 f, which serve to provide those Be 78 series containers with a decorative tape that have been thermoformed in the chamber row R2 of Fig. 1, are in turn guided into the free space 21 , which is on the rear Side of this row of chambers. These decorative tape strips 27 a to 27 f have been cut from the second half of the strip rolled up on the roll 90 .

In Fig. 1 it can be seen that the heat level only un directly behind the chamber row R2 contains a secondary heat box 30 , which serves to keep the section 73 of the thermoplastic strip temperature on Wärmformtempe. Consequently, there is a free space 21 under this heat box, which is sufficient to allow the supply of the decorative tape strips 27 a to 27 f.

Taken as a whole, the arrangement of the feeding devices of the decorative tape strips, which serve to decorate the containers of the rows 80 and 82 at the second heat stand, is arranged symmetrically with the devices mentioned above with respect to a vertical plane which extends beyond the limit of the Sections 70 and 74 of the thermoplastic strip goes beyond. The decorative tape tab 26 f 'a to 26' that is unwound from a roll 90 'which are cut from a first half of a strip to serve in this manner to provide the heat-molded in the series 82 container with a decorative band, that is, through the chambers of the row R4 of Fig. 1, these decorative tape strips being fed through a space which is arranged on the side behind this row R4, since - as can be seen in Fig. 1 - the device does not take up any space-consuming component contains immediately behind this row. The decorative tape strips, which serve to provide the containers of the 80 series with a decorative tape, are fed from a second half of the strip unwound from the roll 90 'under the thermoforming chambers of the R3 series after they have come from the front side of this chamber series have come in free space 21 '. At any given time there are only the two on the first heat prior thermoformed Behäl terreihen immediately before that chamber row R3, and the device comprises in the sem area no platzeinnehmendes component, so that the decorative tape strip 27 'a to 27' f are supplied without any problems can.

With reference to Figs. 5a to 5e, 6 and 7, the realization and attachment of the decorative tapes around the container is described below. This figure shows in a schematic way a Wärmformkam mer 100 , in which a container is thermoformed and provided with a decorative band. The bottom 101 of the chamber 100 is hen with an annular slot 102 , the outer edge 102 a ( Fig. 7) is aligned with the vertical wall 103 of the chamber. In the figures it can be seen that the containers 1 which are thermoformed with the aid of the chamber 100 have a central projecting section 2 in their lower region. In a broader sense, the "bottom" of the chamber is the entire area of this chamber that serves to thermoform the sections from a container that come in addition to its upper edge and vertical wall.

Under the chamber 100 there is a depression 104 , which we call "depression for receiving the decorative tape". Under the chamber are just in case the transfer devices 106 , which are vertically movable in the recess 104 . In the example of FIGS. 5a to 5e, a decorative tape strip 108 is guided into this recess 104 via a free space 109 which is attached to the left side of the depression. As can be seen better in the section of FIG. 6, the depression 104 (more precisely its wall 104 ') represents a passage 110 which opens towards this free space. It is easy to understand that this passage 110 serves to enable the introduction of the free end 108 a of the decorative tape strip 108 into the recess. As can be seen subsequently, the length of the passage 110 , which is measured tangentially on the winding of the decorative tape, is sufficient to enable the free end of this decorative tape to be folded over after being cut off.

The devices for feeding the decorative tape strip comprise the devices for rolling this decorative tape strip in the recess. For this purpose, a roller 112 for feeding the decorative tape strip directly to the recess and to the guides 114 , 116 , 118 is shown in FIG. 6, which forces the decorative tape strip to run around the roller and to enter the passage 110 (the Guides 116 and 118 define between them a slot aligned with passage 110 ). Classically, the decorative tape strip is a paper tape strip made of thermoplastic or analogue material. Although this decorative tape strip is flexible, it is still stiff. Accordingly, it is sufficient to roll the decorative tape strip in the recess, to force it to move forward by actuating the roller 112 , whereupon this decorative strip strips adapts to the contour of the inner wall 105 of the recess. In order to ensure correct rolling together, there is a roll-up core 120 in the depression. In this way, an annular roll-up area 122 is delimited by the outer periphery of the core and the inner wall 105 of the recess. When moving forward in this area, the decorative tape strip can only assume a cylindrical shape.

As can also be seen in Fig. 6, the device contains a system for cutting off the decorative tape strip. This system is only used after the decorative tape strip has been rolled up in the recess. It is located next to passage 110 . In the example shown here, this system includes a knife 124 that is movable with respect to a support member 126 that holds it in close proximity to the recess. The guides 116 and 118 mentioned above play the role of counter knives. After rolling up the decorative tape strip in the recess, the knife 124 is in fact moved in the direction T shown in Fig. 6, whereby the decorative tape strip between the knife 124 and the counter knife 118 and 116 is pressed, so that this decorative tape strip without Difficulties can be cut off. After cutting, the knife 124 is moved back in the direction that is opposite to the T direction. In the example shown here, the support element 126 is moved to the wall of the recess, and the knife 124 can move in a recess 127 which is mounted in this support element. The knife is held in position in this recess by a permanent magnet 128 . The devices for controlling the movement of the knife in the direction T and in the opposite direction are synchronized with the devices for feeding the Dekorbandstrei fens to be activated only after a roll-up phase of a Dekorbandstrei fens in the recess. The section of the decorative tape strip which is cut off and which is located in the depression is now ready to be used as the decorative tape.

The device further includes devices (not shown here) for vertically displacing the transfer devices 106 between an upper position, in which their upper end is fairly exactly at the level of the bottom of the chamber ( Figs. 5a and 5e) and a lower position, in which this upper end is in the vicinity of the lower end 107 'of the decorative tape 108 ' contained in the recess ( Fig. 5c). More specifically, in its upper position, the transfer devices come fairly closely to the plane of the annular slot 102 located in the bottom of the chamber.

As can be seen in Figure 5d, the upper end of the transfer devices is adapted to move the decorative ribbon 108 'from its lower position to its upper position during the movement of these transfer devices. During this movement (between Figs. 5d and 5e), the decorative tape 108 'passes through the annular slot 102 to position itself in the chamber 100 . The process is as follows:

• - While a container 130 is thermoformed in the chamber 100 , in which a decorative band 138 is already provided (for this thermoforming, the transfer devices 106 assume their upper position and interact with the lower end of the decorative band 133 in position), in the Indentation 104 (in the annular space 122 ) the free end of the decorative tape strip 108 is inserted through the passage 110 , then this decorative tape strip is rolled up into this recess by at least one precise turn and finally the decorative tape strip is cut off in the area of the passage 110 to form a decorative tape 108 ;
• - Following the thermoforming of the container 130 which is ejected from the chamber, with the thermoplastic strip 10 being gradually advanced for this ejection process ( Figs. 5c and 5d), the transfer devices 106 are lowered into the recess 104 , which the cut trim ribbon 108 '( Fig. 5b) until these devices 106 have been brought into their lower position ( Fig. 5c);
• - From this lower position, the transfer devices 106 , which contain the decorative band 108 '( Fig. 5d), are moved upwards until these devices have reached their upper position and the decorative band 108 ' is completely in the thermoforming chamber 100 , which is now ready for the heat formation of another container ( Fig. 5e).

In order to eject the already thermoformed container from the thermoforming chamber, one can, as shown in FIGS. 5c and 5d, shut down the entire assembly, which consists of the thermoforming chamber 100 and the depression 104 , which is located below the latter , with respect to the container strip 10 , so that the upper end of the chamber 100 is as close as possible to the level of the lower end of an already thermoformed container be. This downward movement can already after the completion of Wärmefor mung a container begin, that is, that the chamber 100 be down because of can, while the transfer devices 106 descend itself already in the recess, both the chamber 100 and these devices 106 their can reach lower positions at the same time.

It should be noted that the vertical movement of transfer devices 106 is controlled in relation to the chamber / well block, and not with respect to strip 10 .

Then the thermoforming chamber moves up again, as shown in Fig. 5d, to go back to a thermoforming position. This upward movement of the chamber in relation to the thermoplastic strip and the transfer devices 106 in relation to the depression can be realized at the same time, the chamber and the transfer devices being able to reach their respective lower positions simultaneously.

The decorative tape strip 108 , which has not yet been cut off or has just been cut off, can accompany the vertical movements of the thermoforming chamber, in which case the support element 126 ( FIG. 6) can then be connected to the chamber.

In order to hold a decorative tape in position in the thermoforming chamber, this thermoforming chamber advantageously contains air suction devices that contain suction openings 132 .

The transfer devices 106 are mounted on supporting devices which open the passage 110 of the depression at least when they are in their upper position (in order to allow the free end of a decorative tape strip to be inserted without damage) and which delimit an interior space in this depression, which is suitable for holding the decorative tape. If one is dedicated to the Fig. 5a-5e and 6, it is seen that the support devices of four fingers 141, may be made 142, 143 and 144 which are distributed at regular intervals in the periphery of the recess 104. The spaces between the fingers are free and are arranged so that they do not close or block the passage 110 . The transfer devices 106 consequently consist of the upper ends of each finger 141 to 144 . The interior 122 , which is intended to hold the decorative tape in the recess, is consequently arranged in the example shown here between the inner wall 105 of the recess and the inner periphery of the fingers 141 to 144 on the one hand and the outer periphery of the core 120 on the other . The fingers 141 to 144 run in bores 146 which are arranged in the bottom of the recess 104 . However, they do not have the same dimensions over the entire length as the dimensions of these bores. Therefore, over part of its length, each finger represents a recess area 147 that is rotated toward the core. The upper end of the recess 147 represents the inner surface of the transfer devices 106 that is rotated toward the inside of the recess. On this surface, these transfer devices represent a first ramp 148 which narrows towards the top. Therefore, the ramps of the four fingers approach each other upwards. These four ramps cooperate with the decorative tape to prevent this decorative tape from being damaged when the fingers sink back into the recess 104 . More specifically, when the decorative tape wraps around the core in the recess, it naturally occupies that in the assigned interior and consequently generally supports itself against the inner wall 105 of the recess and the recesses 147 of the fingers. When the latter then sink into the recess, the ramps 148 cooperate with the upper edge 107 of the cut decorative ribbon 108 'to tend to narrow (reduce its diameter) this decorative ribbon and thus pass through Allow without damage to the upper ends of the fingers that are above the ramps 148 .

When the fingers have reached their lower position shown in Fig. 5c, the decorative tape 108 'is no longer forced to narrow. It is made from a material, such as paper or an analog equivalent, and has a relatively natural elasticity due to its curl. As a result, since it is no longer forced to constrict, it tends to increase its diameter a little, and its lower end 107 'naturally settles on the transfer devices 106 , i.e. on the upper flat ends of the fingers 141 to 144 . Because of this phenomenon, the transfer devices in their lower position can pick up the lower end of the decor sheet of 108 'and then move that decor tape to chamber 100 as they return to the recess.

In general, the method used can be defined as follows: for each chamber, a generally cylindrical recess 104 is provided for each chamber, which has diametrical dimensions that are almost exactly the same as the dimensions of the chamber, and against the wall 105 of this recess supported decorative tape 108 'is rolled up, then the decor is band 108', which is located in the recess 104, during shutdown of the Trans fervorrichtungen 106 easily elastically narrowed, and the transfer devices are shut down until its upper end is almost exactly at the height of of the lower end 107 'of the decorative ribbon and this decorative ribbon can resiliently return to its initial diametrical dimensions and in this way can lie on the upper end of the transfer devices which can now convey the decorative ribbon into the chamber during the upward movement .

In Fig. 7 it can also be seen that the roll-up core 120 has a second ramp 149 for each recess at its upper end, which extends upwards until its outer circumference almost exactly reaches the dimensions of the inner edge of the annular slot 102 . This ramp interacts with the inner surface of the decorative band 108 'when the latter moves up again and is thereby conveyed by the transfer devices to properly guide the decorative band in the slot 102 .

Fig. 7 shows a partial vertical sectional view in the region of the Ver bond between the recess 104 and the heat chamber 100. This figure shows the position of a decorative sheet according to its cutting through the meter 124. Immediately after cutting, the free end 108 '' of the decorative band 108 'has not yet penetrated into the depression 104 and is located exactly in the position indicated by a broken line in FIG. 6. The rest of the decorative tape is correctly arranged in the depression and indicated in Fig. 7 by reference 108 '. The free end 108 '' is folded over in the passage 110 over the rest of the decorative tape - while this decorative tape is being fed into the molding chamber 100 - the lower end of the wall of this chamber, which is located directly above the passage 110 , for this purpose contains a truncated cone-like ramp 150 which approaches the axis of the chamber in an upward direction, the free end 108 '' cooperating with this ramp when the decorative ribbon carried by the upper end of the transfer devices goes into the chamber.

Claims (14)

1. A method for producing containers ( 1 ) by thermoforming and attaching decorative ribbons to these containers of a type according to which a thermoplastic strip ( 10 ) transported in steps is heated, in each of the thermoforming chambers with at least one row (R1) with Wärmeformkammer a decorative tape is provided that is cut from a Dekorbandstrei fen ( 26 , 27 ), and in each chamber from each section of the thermoplastic strip, which is referred to as "container position", a container is thermoformed, characterized in that at each feed step of the thermoplastic strip ( 10 ), this thermoplastic strip is transported forward by a length which corresponds to the production of kn rows of containers, where k and n are integers over 1, further characterized in that a thermoforming station ( 16 ) is used is that over k feed steps of the thermoplastic strip and k heat form levels ( 18 , 28 ; 38 , 48 ; 58 , 68 ), each of which has n rows of chambers, a free space which is arranged in front of or behind each chamber, further characterized in that a decorative tape is provided at each of these heat mold stands in each of the chambers of the heat mold stand concerned, the decorative tapes being cut from a decorative tape strip ( 26 , 27 ) which is fed through the free space available for each chamber, and n rows of containers which are provided with decorative tapes are thermoformed, further characterized in that the k heat molding stands ( 18 , 28 ,...) Are arranged so that for each container position of the thermoplastic strip, which was not thermoformed at a certain heat mold stand ( 18 ) lying ahead, a chamber was in a heat mold ( 28 ), which is present behind the above-mentioned heat level, be in this chamber, a container at the corresponding Po sition heat is molded. 2. The method according to claim 1, characterized in that n is an even number and the chambers (C1, C2, C3, C4) at each of the k heat mold stands ( 38 , 48 ) arranged over n / 2 groups with two adjacent rows are further characterized in that the k heat mold levels ( 38 , 48 ) are arranged so that for each chamber (C1, C2; C3, C4) belonging to a specific heat mold level ( 38 ; 48 ), another chamber (C3 , C4; C1, C2) is present, which belongs to a different heat level ( 48 ; 38 ), which is a distance from the relevant chamber by a distance which is almost exactly the same (1 + 2 / kn) times the feed step (p) of the thermoplastic strip. 3. The method according to claim 1, characterized in that the chambers (C'1, C'2, C'3, C'4, C'5, C'6) at each of the k heat resistance levels ( 58 , 68 ) n rows of chambers which are not arranged next to one another, further characterized in that the k shaped heat stands ( 58 , 68 ) are arranged such that for each chamber (C'1, C'3, C'5;C'2,C'4,C'6), which belongs to a certain thermoforming station ( 58 ; 68 ), a chamber (C'2, C'4, C'6;C'1,C'3,C'5) is available, which too belongs to another heat level ( 68 ; 58 ) which is a distance from the chamber in question which is almost exactly the same (1 + 1 / kn) times the feed step (p). 4. The method according to any one of claims 1 to 3, characterized in that at each of the k-1 heat mold stands ( 38 , 58 ), which are located before the heat mold stand, which is furthest behind ( 48 , 68 ), the non-thermoformed positions of the thermoplastic strip ( 49 , 59 , 59 ', 59 '') are kept at thermoforming temperature ( 30 , 30 '). 5. The method according to any one of claims 1 to 4, characterized in that each heat molding chamber ( 100 ) is provided with a bottom ( 101 ) having an annular slot ( 102 ), and under each heat molding chamber a recess ( 104 ) is provided for receiving the decorative tape in which the transfer devices ( 106 ) can move vertically, and in that the following stage cycles are used:

• - During the thermoforming of a container ( 130 ) referred to as "previous" and while the transfer devices ( 106 ) are in an upper position in the thermoforming chamber, in which their upper end is almost exactly at the level of the bottom ( 101 ) of the chamber, in the recess ( 104 ), which is located under this chamber, the free end of a decorative tape strip ( 108 ) is inserted through a passage ( 110 ) that opens to the space that corresponds to the above-mentioned chamber, the decorative tape strip in this recess at least is rolled up by exactly one turn, and this decorative tape strip is cut off in the region of the passage ( 110 ) of the depression to form a decorative tape.
• - Following the thermoforming of the previous container ( 130 ) which is ejected from the chamber and the decorative ribbon is moved forward by one step, the transfer devices ( 106 ) are lowered into the recess ( 104 ) which the decorative ribbon ( 108th ') until these devices have been brought into a lower position, in which their upper end is almost exactly at the level of the lower end of said decorative band.
• - The transfer devices ( 106 ), which convey said decorative band ( 108 '), are raised until these devices have reached their upper position and the decorative band is completely in the thermoforming chamber ( 100 ), which is now more for thermoforming a "subsequent "Container is ready.

6. The method according to claim 5, characterized in that a generally cylindrical recess ( 104 ) is available for each chamber, which has diametrical dimensions which are almost exactly the same as the dimensions of the chamber, and in that the decorative band ( 108 ') , which is supported against the wall ( 105 ) of the recess, is rolled up, further characterized in that when the transfer devices ( 106 ) are lowered, the decorative ribbon ( 108 ') present in the recess ( 104 ) is slightly elastically narrowed, further characterized in that the said devices are lowered until their upper end is almost exactly at the level of the lower end ( 107 ') of the decorative band ( 108 '), and in that this decorative band is ne original in an elastic manner can assume diametrical dimensions again and in this way rests on said upper end of the transfer devices. 7. Device for the production of containers ( 1 ) by thermoforming and attaching decorative ribbons to these containers, this device having devices for the gradual feeding of a thermoplastic strip, heating devices ( 14 ) for the said thermoplastic strip, ei ne thermoforming station ( 16 ) that includes at least one row (R1) of thermoforming chambers, tape devices for cutting the decorative tapes from a decor, devices for providing a decorative tape in each thermoforming chamber, and devices for thermoforming a container in each chamber from a portion of the thermoplastic Strip, which is referred to as the "container position", characterized in that k and n are integers over one and the thermoforming station ( 16 ) extends over k feed steps of the thermoplastic strip and comprises k thermoforming stands ( 18 , 28 ), each of which n rows with Thermoforming chambers (R1, R2; R3, R4) contains as well as a free space ( 19 , 21 , 19 ', 21 '), which is attached in front of or behind each chamber, in that the device for feeding a strip of decorative tape through the for each chamber intended space contains at least up to each chamber and Vorrichtun conditions to provide a decorative tape in each chamber and cut this decorative tape from each decorative tape strip, characterized in that each thermoforming stand ( 18 , 28 ) devices ( 20 , 22 , 24 ) for thermoforming a container contains in each of the chambers that are present in this heat mold, and in that the heat molds ( 18 , 28 ) are arranged so that for each container position of the thermoplastic strip, at a certain forward heat mold ( 18 ) has not been thermoformed , A heat level ( 28 ) is present, which is behind the above-mentioned specific heat level, deswei ter A chamber and thermoforming devices capable of thermoforming a container at the position in question. 8. Device according to claim 7, characterized in that n is an even number and each heat level ( 38 , 48 ) of the heat molding station contains n / 2 groups with two adjacent heat molding chamber rows (C1, C2) and in that the k heat levels so are arranged so that for each of the chambers (C1, C2; C3, C4) belonging to a certain heat level ( 38 ; 48 ), there is a further chamber (C3, C4; C1, C2) which has a different heat level ( 48 ; 38 ) heard from the chamber in question by a distance (d1) which is almost exactly the same (1 + 2 / k) times the feeding step of the thermoplastic strip. 9. Device according to claim 7, characterized in that depending on the heat level ( 58 ; 68 ) of the heat molding station n non-adjacent rows of chambers (C'1, C'3, C'5;C'2,C'4, C ' 6) and in that the k heat stands are arranged in such a way that for each of the chambers (C'1, C'3, C'5;C'2,C'4,C'6) leading to a specific one Heat level ( 58 ; 68 ) belong, another chamber (C'2, C'4, C'6;C'1,C'3,C'5) is present, which belongs to another heat level ( 68 ; 58 ) heard, which is a distance (d'1) from the chamber in question that is almost exactly the same (1 + 1 / kn) times the feed step. 10. Device according to any one of claims 7 to 9, characterized in that each of the k-1 heat mold stands ( 38 ; 58 ), which are located in front of the heat mold stand which is furthest behind ( 48 ; 68 ), devices ( 30 , 30 ') contains in order to keep the container positions of the not yet thermoformed thermoplastic strip ( 49 ; 59 , 59 ', 59 '') at the thermoforming temperature. 11. Device according to any one of claims 7 to 10, characterized in that each thermoforming chamber ( 100 ) contains a bottom ( 101 ) which is provided with an annular slot ( 102 ), characterized in that the device for each chamber has a recess ( 104 ) for receiving decorative ribbons, which is located under the chamber, and transfer devices ( 106 ), which are vertically movable in the said recess, characterized in that the recess has a passage ( 110 ) which faces the free space ( 109 ) opens, which corresponds to the corresponding chamber and is intended to enable the introduction of the free end ( 108 a) of a strip strip ( 108 ) into the recess, in that the devices for feeding the strip strip devices ( 112 , 105 , 120 , 122 ) in order to roll up this decorative tape strip in the depression, and in that a system ( 124 ) for cutting off the decorative tape strip, which is suitable for cutting off this decorative tape strip after it has rolled up in the recess, lies on the passage ( 110 ) of said recess, and in that the device contains devices for moving the transfer devices ( 106 ) vertically between an upper position in which the upper end of said devices is located almost exactly at the level of the bottom of the chamber, and to move a position in which said upper end is located at the lower end ( 107 ') of the basket strap ( 108 '), which in of the recess, and in that the upper end of the transfer devices ( 106 ) is adapted to move the decorative tape ( 108 ') from its lower position to its upper position during the movement of said devices, the decorative tape during this Movement across the annular slot ( 102 ) is to position itself in the chamber ( 100 ). 12. A device according to claim 11, characterized in that the transfer devices ( 106 ) are mounted on support devices ( 141 , 142 , 143 , 144 ) which define the passage ( 110 ) of the recess ( 104 ) at least in the upper position of the said devices release and in this recess delimit an interior space ( 122 ) which is suitable for containing a decorative band, further in that the transfer devices ( 106 ) have a first ramp ( 148 ) on their inner surface directed towards the recess ( 104 ) which narrows upwards and is adapted to cooperate with the decorative band ( 108 ') contained in the recess to narrow this decorative band during the downward movement of said devices, and in that the upper end of the transfer devices therefor is suitable to receive the lower end ( 107 ') of the decorative tape ( 108 ') in the lower position of said devices, if this the decorative tape expands and tends to resume its original diametric dimensions in an elastic manner. 13. Device according to any one of claims 11 and 12, characterized in that each of the recesses lying under the heat molding chamber contains a roll-up core ( 120 ) for the decorative tapes. 14. Device according to claims 12 and 13, characterized in that the roll-up core ( 120 ) for each recess near its upper end has a second ramp ( 149 ) which extends upwards until its outer order is pretty accurate the dimensions of the inner edge of the annular slot ( 102 ) is reached, said ramp being adapted to cooperate with the inside of the De korbandes to guide this decorative tape in said annular slot.