WO2016087169A1

WO2016087169A1 - Rotary dancer for a packaging machine

Info

Publication number: WO2016087169A1
Application number: PCT/EP2015/076189
Authority: WO
Inventors: Frank SABATO
Original assignee: Gea Food Solutions Germany Gmbh
Priority date: 2014-12-05
Filing date: 2015-11-10
Publication date: 2016-06-09
Also published as: EP3456640A1; EP3456640B1; EP3227190A1; BR112017011887B1; ES2702748T3; US20170327257A1; CN107000860B; BR112017011887A2; ES2897652T3; CN107000860A; EP3227190B1

Abstract

The present invention relates to a packaging machine (1), which unrolls a lower film web (8) from a supply roller (52) and transports it intermittently or continuously along the packaging machine and thereby forms packaging recesses (6) in the lower film web (8) in a forming station (2), after which the packaging recesses are filled with a product (16) to be packaged, wherein an upper film web (14) is subsequently sealed onto the lower film web (8) in a sealing station (15), wherein the upper film web (14) is unrolled from a supply roller (22). Provided downstream of the supply roller is a dancer (20), which has at least one, preferably two rollers (23.1, 23.2), which are provided on a linkage (23.4), which, driven by a rotary drive, rotates about an axis of rotation (23.3) and thereby stores a certain length of film web (8, 14) and/or produces a certain tension in the film web (8, 14).

Description

Rotary dancer for a packaging machine

The present invention relates to a packaging machine with a dancer, a film brake, a gluing table and / or a film roll.

Such packaging machines are known from the prior art. In these packaging machines, a lower film web is unrolled from a supply roll and preferably transported intermittently along the packaging machine. In a forming station, first a packaging tray is formed in the lower film web, which is then filled with a packaged product, in particular a foodstuff. Subsequently, the packaging tray is sealed in a sealing station with a top film which is sealed to the lower film. The film web is also unrolled from a supply roll. Between the supply roll and the sealing station while a dancer is provided, which must be adapted to the preference that makes the lower film web at a feed. In the past, one for the

Packaging machine individually designed dancers are provided, which has proven to be very expensive.

It was therefore the object of the present invention to provide a packaging machine which does not have the disadvantages of the prior art.

The object is achieved with a packaging machine which rolls a lower film web from a supply roll and transported intermittently or continuously along the packaging machine and forms in a forming station packaging trays in the lower film web, which are then filled with a packaged, then in a sealing station to a top film web the sub-sheet is sealed, the

Upper film web is unrolled from a supply roll and downstream of at least one supply roll, a dancer is provided which has at least one, preferably two rollers which are provided on a linkage, which is driven by a rotary drive rotates about a rotation axis and thereby a certain length of film web stores and / or generates a desired tension in the film web.

The present invention relates to a packaging machine in which a lower film web, in particular a plastic film web, which preferably has a width between 200 mm and 1 m and more, is unrolled from a supply roll and preferably transported intermittently along the packaging machine. In a forming station, this sub-web is then first heated and by means of a thermoforming tool Molded packaging troughs in the lower film web. In general, several will

Packaging troughs, which are arranged in a so-called format, formed simultaneously and subsequently transported simultaneously along the packaging machine. Subsequently, each packaging tray with a packaged, especially a food, such as sausage, ham or cheese, filled and sealed in a next step in a sealing station with a top film, the top film is usually sealed to the lower film web. Subsequently, the thus finished packaging is separated. The top film web is also unrolled from a supply roll.

According to the invention downstream of the respective supply roll relative to the

Transport direction of the respective film web at least in the region of the upper film web, but possibly also in the region of the lower film web provided a dancer, which preferably has two rollers which are provided on a linkage, which is driven by a rotary drive rotates about an axis of rotation and thereby a certain film length stores and / or generates the desired tension in the film web. Consequently, the dancer is suitable as a material storage since the development of the film web from the supply roll takes place with a different velocity profile than the advance of the film web.

A linkage in the context of the invention is any component which is composed for example of rods, tubes, profiles and / or sheets and / or plates. The linkage can also be a pre-formed component that, if necessary,

is reworked. At least two rotatable, in particular non-driven rollers are arranged on this linkage.

Preferably, a means is provided on the dancer, with which the angular position of the linkage is detected. As a result, a controller to which this means is connected knows which length of film web is in the dancer and / or the controller can, for example, calculate the number of degrees by which the position of the linkage has to be changed in order to achieve a certain tension in the film.

According to the dancer, in particular the linkage, provided with a rotary drive and / or connected, which simultaneously rotates the linkage and thus the two rollers about the axis of rotation of the linkage and thereby changes the storage length of the film web in the dancer and / or the film tension. The rotary drive is preferably a pneumatic drive, a servo motor or a stepper motor. In the event that the rotary drive is a pneumatic drive, the pressure is preferably adjusted as a function of the angular position of the linkage. This can be, for example done by a proportional valve. Starting from a zero position, the pressure preferably drops and then rises again until the end position of the linkage. Particularly preferably, the pressure curve corresponds to a cosine curve, with the pressure particularly preferably not being zero at any time.

According to a preferred embodiment of the present invention, at least one role of the dancer, preferably all the dancer's roles, is at both of them

stored opposite ends. This results in a more uniform load distribution along the roll. In particular, their bending is at least reduced and / or made substantially symmetrical over the width of the film, which is particularly important for wide film webs, preferably> 400 mm, is of crucial importance over the entire width of the film web, i. transverse to its transport direction to achieve a constant and / or at least symmetrical voltage curve.

Preferably, both bearings of each roller are supported on a wall located on one side of the film web. As a result, the area under the dancer is freely available and can be viewed and, if necessary, edited.

Preferably, the dancer, in particular the linkage is completely enclosed. The film web passes through slots in the housing or out of the housing. As a result, the dancer is protected from splash water, for example during cleaning.

Particularly preferably, the surrounding machine area, in which the dancer is arranged, completely housed. Alternatively or additionally, the housing is provided so that after opening an access door, the whole dancer, but in particular the linkage is freely accessible.

Preferably, the rollers, in particular their pivot bearings are grounded, so that there is no undesirable spontaneous discharge due to electrostatic charge. The pivot bearings are preferably rolling bearings.

According to a further inventive or preferred subject matter of the present invention is based on the transport direction of the top and bottom film web, but in particular the top film web downstream of the dancer provided a film brake, in particular for positioning the top film web on the

Sub-film web is needed, for example, for positioning of printed patterns, which are often provided on the upper film web. Preferably, this film brake is pivotally mounted, in particular pivotable about a vertical axis and / or a horizontal axis. This allows the film brake of their orientation in the production position, ie transversely to the transport direction of the

Sub-web, in a position, for example, parallel to the transport direction of the sub-web, be pivoted so that this area to inspection or

Machining purposes is available. Preferably, a connecting means, in particular a locking means is provided opposite the vertical pivot bearing on the other side of the film web, with which the film brake in their

Production position can be fixed transversely to the transport direction of the lower film web. This connecting means is preferably operated without tools. Further preferably, the film brake consists of a first and a second part, which are interconnected, wherein between the first and the second part, a gap is provided through which the film web, in particular the top film web, runs in production and in the region of a braking means , For example, an inflatable tube, is provided with which the transport of the top film can be slowed down, whereby the film web is stretched. Preferably, the second part is now rotatable, in particular about a vertical axis of rotation, mounted on the first part or vice versa. As a result, in particular for threading the film web, the second part is rotated away from the first part, the film web is inserted and then the second part is turned back again and locked in a position parallel to the first part. This preferred embodiment of the present invention greatly facilitates threading of the film web into the film brake.

Yet another inventive or preferred subject matter of the present invention is a packaging machine having a cutting and gluing table. Such a cutting and gluing table is particularly required in a film roll change, in which the film end of the used film roll is connected to the beginning of the new film roll.

Preferably, the cutting and bonding table has at least one, preferably a plurality of recesses, which are connected to a, in particular common vacuum means. By this vacuum means, the two film sheets to be joined are fixed on the table and can be processed accordingly. Alternatively, the film web can also be fixed with adhesive pads or with an inflatable film tube.

Preferably, the recesses are selectively and reversibly equipped with a suction or with a blind plug. Preferably, the suction means Perforated sheet on. By means of the perforated plate, the vacuum can be transferred to the respective film web. A blind plug covers the recess, so that in this area no suction force is exerted on the film web. Due to the position of the recesses or the inserts of the suction means and the blind plug, it is possible to adapt the cutting and bonding table, for example, to the width, but also to the nature of the respective film web without different cutting and / or gluing tables for the respective Film web would have to be provided. Preferably, the

Recesses along a line, in particular arranged equidistantly. Particularly preferably, the cutting and gluing table has at least two, in particular, parallel rows of recesses. As an alternative or in addition to the perforated plate, it is also possible to use a slot nozzle or a porous, for example sintered material.

Preferably, the cutting and gluing table is pivotally and / or easily mounted on the packaging machine, which improves their accessibility. Preferably, the cutting and sticking table is upstream of the dancer with respect to the dancer

Transport direction of the film web, arranged, but particularly preferably immediately behind the film roll.

Yet another inventive or preferred subject of the present invention is a packaging machine having rollers in which the bearing seat is connected by a laser weld to the rotating body of the roller. This inventive or preferred embodiment of the invention has the advantage that the rollers have significantly less heat distortion than rollers according to the prior art. Nevertheless, they are completely waterproof.

Preferably, the upper film web runs upstream of the sealing station at least in sections parallel to the machine frame or parallel to the transport direction of the lower film web. Alternatively, the direction of travel of the top film web sections can also be arranged by 90 degrees to the machine frame, which, for example, particularly large and therefore usually heavy supply rolls can be used, which include a high storage capacity of film.

Yet another preferred subject of the present invention is a

A packaging machine comprising at least one labeler and / or printer, preferably located downstream of the supply roll and upstream of the dancer. Yet another preferred subject matter of the present invention is a packaging machine which has a top film auxiliary take-off which pulls the top film web upstream of its entry point into the sealing station preferably synchronously with the intermittent one

Transport movement of the sub-film web drives. For example, in sensitive, z. As very thin films and / or films with gummiartigem stretching behavior so that acting on the fresh sealing seam tensile forces and thus possible wrinkles in the sealed seam area are minimized. The upper film web is preferably clamped between two mutually prestressed deflection rollers, of which at least one deflection roller

is driven. For threading the top film web, the bias between the two pulleys can be solved and this preferably by a reasonable amount

be moved apart.

Yet another object of the present invention is a method for threading a film web into a dancer, wherein the rollers of the dancer can be converted into a threading position. In this threading position, the film web can be pulled substantially along a straight line, preferably vertically, through the dancer and does not have to be laboriously guided around the rollers. This is particularly advantageous in a dancer, which has rollers which are mounted at both ends. As soon as the film web has been threaded into the dancer, it assumes its zero position or, subsequently, its storage position.

The statements made on the packaging machines according to the invention apply equally to the method according to the invention and vice versa.

Preferably, for threading the film web in the film brake part of the

Foil brake moved away, in particular turned away, and then, as soon as the film web extends through the film brake, turned back again.

The inventions will be explained below with reference to FIGS. 1 to 12. These

Explanations are merely exemplary and limit the general

Inventive idea not one. The explanations apply equally to all articles of the present invention.

FIG. 1 shows the packaging machine according to the invention.

Figure 2 shows the dancer. FIG. 3 shows the dancer according to FIG. 2 in its threading position.

FIG. 4 shows the dancer in a production position.

FIG. 5 shows the suspension of the dancer on the wall 26.

FIG. 6 shows the arrangement of the film brake in the packaging machine.

FIG. 7 shows the film brake according to FIG. 6 in a service position.

FIG. 8 shows the pivoting away of the second part from the first part of FIG

Film brake.

FIG. 9 shows the cutting and gluing table.

FIG. 10 shows a suction box.

Figures 11-13 show the laser welded roll.

FIG. 1 shows the packaging machine 1 according to the invention, which has a thermoforming station 2, a filling station 7 and a sealing station 15. A lower film web 8, here a plastic film web 8, is withdrawn from a supply roll 52 and cyclically transported along the packaging machine according to the invention from right to left. At one cycle, the lower film web 8 is transported on by one format length. For this purpose, the packaging machine has two transport means (not shown), in the present case in each case two endless chains, which are arranged to the right and left of the lower film web 8. Both at the beginning and at the end of the packaging machine at least one gear is provided for each chain in each case, around which the respective chain is deflected. At least one of these gears is driven. The gears in the input area and / or in the output area may be connected to each other, preferably by a rigid shaft. Each transport has a plurality of clamping means which grip the lower film web 8 in the inlet region 19 by clamping and the movement of the

Transport means transmitted to the lower film web 8. In the outlet area of the

Packaging machine, the clamping connection between the transport and the lower film web 8 is released again. Downstream of the inlet region 19, a heating means 13 is provided, which heats the film web 8, especially when it is stationary. In the thermoforming station 2, which has an upper tool 3 and a lower tool 4, the has the shape of the packaging tray to be produced, the packaging trays 6 are formed in the warmed film web 8. The lower tool 4 is arranged on a lifting table 5, which, as symbolized by the double arrow, is vertically adjustable. Before each film feed, the lower tool 4 is lowered and then raised again. In the further course of the packaging machine, the packaging trays are then filled in the filling station 7 with the packaged goods 16. In the adjoining

Sealing station 15, which also consists of an upper tool 12 and a vertically adjustable lower tool 1 1, a top film 14 is firmly bonded by sealing to the lower film web 8. Also in the sealing station, the upper tool and / or the lower tool are lowered or raised before and after each film transport. The upper film 14 may be guided in means of transport or be transported by transport chains, these means of transport then only in front of the sealing station and possibly

extend downstream. Otherwise, the statements that have been made to the means of transport of the lower film apply. The upper foil can also be warmed up with a heating medium and deep-drawn. For sealing purposes, a heatable sealing frame is provided as a lower tool 11, for example, which has an opening per packaging cavity into which the packaging cavity is sealed during sealing, i. in the upward movement of the

Sealing tool, dips. For sealing, the upper and lower film webs between the upper and lower tool 12, 1 1 are pressed together and connect under the influence of heat and pressure. After sealing, the tools 1 1, 12 are moved apart vertically again. Between the supply roll 21 and the sealing tool, a dancer 20 is provided, which compensates for the intermittent feed of the lower film 8 and thus the intermittent withdrawal of the upper film web 14. The dancer can as

Foil web storage and / or serve to generate a certain film tension. The person skilled in the art understands that several top films may be present, for example in a multi-layered package or a package with several top films. Preferably, a dancer is then provided in the course of each top sheet. The skilled person further understands that a dancer may also be provided in the region of the lower film, preferably downstream of the supply roll 52. Before and / or during sealing of the upper film to the lower film, a gas exchange preferably takes place in each packaging trough. For this, the air present in the packaging recess is first partially sucked off and then replaced by a replacement gas. For this purpose, in the region of each format holes are introduced into the lower film web in the lower film in the region of the transport chains, through which the air is sucked between the film webs 8, 14 and the replacement gas is then blown in. In the further course of the packaging machine, the finished packages are separated, which in the present case with the cross cutter 18 and the Slitter 17 takes place. The cross cutter 18 can also be raised or lowered in the present case with a lifting device 9.

FIG. 2 shows the supply roll 21, from which, in the present case, the top film web 14 is unrolled. The person skilled in the art will understand that the following statements apply analogously to the sub-web 8 as well. Downstream with respect to the transport direction of the film web 14, the dancer 20 is provided, which in the present case has two fixed rollers 22, between which the rotary member 23 is provided, which is provided for rotation about a rotational axis 23.3 by means of a drive drivable. This rotary member has a linkage 23.4, on which the axis of rotation 23.3 is arranged and which has two rollers 23.1, 23.2, which are provided in the present case opposite one another and at the same distance from the axis of rotation rotatably on the rod 23.4. The roles

23.1, 23.2 are preferably not driven. The entire dancer 20 is arranged in the present case in a housing 24 and thereby protected against unwanted interference by a worker. However, the housing and / or its supporting basic construction can also take over supporting functions of the dancer and / or protect against unwanted cleaning agents.

Figures 3 and 4 illustrate the operation of the dancer. In Figure 3, the dancer is shown in its so-called Einfädelstellung. Compared to the illustration according to Figure 2, the rollers 23.1, 23.2 and their connection, here the rod 23.4, rotated about its axis of rotation 23.3 counterclockwise. This results in a gap, here a vertical gap, between the upper rollers 22, 23.1 and the lower rollers 22 and

23.2, through which the film web 14 can be pushed through in a simple manner, which considerably simplifies the threading of the film web, in particular because the rollers 22, 23.1, 23.2 are mounted at both ends according to a preferred embodiment of the present invention. Once this threading is completed, the rollers 23.1 and 23.2 are again rotated about its pivot point 23.3, now in the clockwise direction, and the dancer can be used as a film storage. FIG. 4 shows the partially filled memory. Characterized in that the rollers 23.1 and 23.2 were rotated in a clockwise direction compared to the illustration of Figures 2 and 3, the film length, which is located in the memory, has been increased. The stored film length depends, as the skilled artisan easily recognizes, from the angle of rotation α of the rotary member 23 between 0 and almost 180 °. As already explained, the rotary member 23 is driven by means of a motor. This motor can be a servomotor or actuator motor or stepper motor or a pneumatic drive. In the case of the pneumatic drive, the pressure with which the drive is driven is preferably regulated as a function of the angular position of the rotary part 23. Starting from the zero position (see Figure 2), in which the dancer stores no or almost no film and the rollers 23.1 and 23.2 are in the present case substantially in a line, with the rollers 22, the pressure increases first strong, in particular up to a position of the rollers 23.1 and 23.2 of a = 20 - 36 °, then remains substantially constant, then, preferably from an angle of a = 40 °, to drop until the dancer his end position (dancer filled), which is the case at a = about 170-180 °, in particular a = 176 °. In dynamic operation, the dancer falls below an angular position of a = 20 - 30 °, in particular a = 30 °, preferably not. One with the invention

Packaging related control knows at any time in which

Rotary position, the rotary member 23 is located and accordingly how much film length is stored in the dancer. Accordingly, the drive of the rotary member 23 is driven to make this stored length equal to increase or decrease. However, the drive of the rotary member 23 can also be used to change the tension in the film web by changing the rotation angle of the rotating part with a stationary film roll 21 and stationary film web 8, wherein in the present case, with a clockwise rotation, the voltage increases and decreases in a counterclockwise rotation, the tension in the film web 14. The change or the constant holding of the tension of the film web can also take place during the movement of the film roll 21. In the area of the dancer or in the region of the film web measuring means can be provided, with which the film tension is measured and regulated accordingly.

Figure 5 shows the suspension of the dancer 20 on the packaging machine. In the present case, the dancer is provided in the region of the upper film web 14 and accordingly provided on an arm or a sheet or a wall or a frame 26 - hereinafter assembly 26- above the lower film web 8. The entire dancer 20 is provided in the present case with four suspensions 25 on the assembly 26. These suspensions are in the present case designed as pull / push rods 25 and extend horizontally through the entire width of the dancer or a housing 24 and / or its supporting basic structure (not shown). The entire dancer is surrounded by the housing 24, the front side has a door 28 which can be opened about the hinge 27. Furthermore, a cover 29 is preferably provided on the housing, which can be opened, in particular opened, about a horizontal axis. As can be seen by the example of the inlet roller 30, preferably each roller in the area of the dancer is mounted at its two opposite ends on the dancer housing 24 and / or on its supporting basic construction or on the linkage 23 4. This results in a much better and more symmetrical load distribution in the field of roles. In particular, the roles turn less through, making it one more uniform development of the supply rolls comes. Also, the rotary member 23 preferably has at its two opposite ends in each case a rotary bearing, which are respectively supported on the housing 24 and / or on its supporting base structure and thus on the suspension 25 of the dancer. Nevertheless, the dancer is 20 or his

Housing supported only on one side of the film web by means of the assembly 26, so that the area below the dancer 20 for a worker well visible and available.

Figures 6 and 7 show the film brake according to the invention 32. A film brake is, based on the transport direction of the respective film web, provided downstream of a possibly existing dancer and serves, in particular the

To stretch the upper film web to align the upper film web relative to the lower film web prior to their sealing, so that, for example, provided on the upper film web printed image matches the position of the provided in the lower film web packaging tray. In the present case, the film brake on one side of the lower film web 8, here mounted on a mounting 26, by means of a rotary and / or pivot bearing 34. On the opposite side of the lower film web 8 is a bearing 33, which has a closure 36, in particular a quick release, with which the local end of the film brake 32 can be connected to the frame of the packaging machine. This closure 36 preferably has a handle 35 with which the closure can be unlocked in particular. A subsequent locking is preferably carried out automatically, in particular by a snap or locking mechanism. After actuation of the handle 35, the two parts of the closure 36 can be separated from each other and the entire film brake can around the pivot bearing 34, as shown in Figure 7, from a production position substantially transverse to the transport direction of

Underfilm web (Figure 6) in a service position substantially parallel to

Transport direction of the film web are pivoted. FIG. 7 shows the transition of the film brake 32 from the production position into the service position.

As can be seen in FIG. 8, the film brake in the present case consists essentially of a first part 32. 1, on which a second part 32

Rotary shaft 38 is rotatably mounted. At the opposite side of the axis of rotation 38 of the two parts 32.1, 32.2, a detent 37, here represented by a pin, through which the two parts can be held in a parallel position, the production position to each other. Between the two parts 32.1, 32.2 is located during the

Production a gap through which the film web, in particular the upper film web 14, is guided. In one of the two parts is a pressure medium, such as a hose whose circumference is variable and thereby changes the size of the gap and thus pushes the film web against the other part, whereby the friction between the film web and the brake 32 increases or decreases and accordingly brakes more or less. In order to facilitate the threading of the film web 14 into the gap before the start of production, the closure 37 is opened, here the part 32.2 is rotated about the axis of rotation 38 and then the film web is applied to the first part 32.1. Then, the second part 32.2 can be turned back into its position parallel to the part 32.1 and secured in this position by means of the shutter 37. The person skilled in the art understands that the respective other part can also be moved.

FIG. 9 shows the cutting and gluing table 39. In the present case, this has two inlet rollers 42 and one outlet roller 43, but these do not necessarily have to be present. Furthermore, the cutting and gluing table 39 optionally has two

Clamping means 40, 41 which are for example rotatable about an axis from a clamping to a non-clamping position and vice versa and which can be used to fix the respective ends of the film webs to be joined.

According to the invention, the adhesive table has a plurality of recesses. In the present case, two, parallel rows here, each with nine, here equidistant, recesses are provided, which are preferably provided on the right and left of a cutting guide 46. The cutting guide serves as a guide / attachment, for example for a knife, in order to be able to cut off the respective film web along a straight cut. each

Recess is here by means of a channel to a, preferably common vacuum means, in particular a vacuum pump, connected. Furthermore, each recess can optionally be provided with a suction box 44 or a blanking plug 45, so that it can be selected in accordance with the width of the film web and / or the nature of the film web, in which area vacuum is applied. The suction boxes 44 are provided for example with a perforated plate 44.1, through which the vacuum on the

Film web attacks and this pulls in the direction of the cutting and bonding table 39 and fixed there. In the blind plug 45 is no or only a slight vacuum. In the present example, the suction boxes and the blind plugs are provided alternately over the entire width of the bonding table. For films with a comparatively small film width, it makes sense to provide the outermost recesses with a blanking plug in order to avoid the suction of false air.

FIG. 10 shows by way of example a suction box 44 which is reversible, preferably

tool-free, can be provided in a recess. This intake box consists in the present case of an insert 44.2, here a hollow body, and a perforated plate 44.1 connected thereto. The vacuum sucks air through the perforated plate in the Inside of the insert 44.2 and from there by means of holes which are provided on the circumference of the insert 44.2, in the vacuum channel. The blind plug is constructed analogously, except that the perforated plate is replaced by a non-perforated plate and / or accounts for the holes on the circumference of the insert 44.2.

FIGS. 11 and 12 show the roller according to the invention. This consists of a rotary body 47, at whose opposite ends in each case the pin of a rotation axis is provided. The axis of rotation preferably does not extend through the roller. FIG. 12 shows the production method. Preferably, the

Rotary axis is provided on a disk-shaped element, in particular a circular disk or a circular disk. This disk-shaped element or the axis of rotation 49 itself is connected to the rotary body by means of a laser weld. As a result, the role of the invention is on the one hand tight. By laser welding also takes place a comparatively low heat input, so that the role does not warp during welding. Each roller has an axis of rotation 49 on the right and left, by means of which the roller can be supported on both sides by a housing 24 or the like. As a result, the load distribution of the role based on a one-sided storage is significantly improved. The person skilled in the art will understand that the axis of rotation can also be a cylindrical indentation which receives a pin.

Preferably, all other rollers provided in the area of the packaging machine according to the invention are manufactured in this way.

FIG. 13 shows the arrangement of a rotary bearing 48, in particular at each of the two ends of a roller. This pivot bearing 48 is arranged by means of a bearing seat 50, for example on the frame 55 of the packaging machine and / or on the housing 24 of the dancer. The outer ring of the rotary bearing 48, here a roller bearing, abuts against the bearing seat 50. The inner circumference of the inner ring of the pivot bearing 48 is connected to an axis of rotation 49, which in turn is provided on the roller. The arrangement can also be reversed. The rotary bearings are in particular provided so that they are electrically conductive, so that no static charge can form in the region of the roller. LIST OF REFERENCE NUMBERS

1 packaging machine

2 forming station, thermoforming station

3 upper tool of the thermoforming station

4 lower tool of thermoforming station

5 lifting table, carrier of a tool of the sealing, thermoforming station and / or the cutting device

6 packaging tray

7 first filling station

8 film web, bottom film web

9 lifting device

10 drive

1 1 lower tool of the sealing station

12 upper tool of the sealing station

13 heating means

14 top film web, lid film

15 sealing station

16 packaged goods

17 slitter

18 cross cutters

19 inlet area

20 dancers

21 supply roll of the upper film web

22 rotating roller for deflecting the film web

23 turned part

23.1 first turning roller for deflecting the film web

23.2 second turning roller for deflecting the film web

23.3 Rotary axis

23.4 Lever, connection, linkage

24 housing

25 suspension, tie rods

26 mounting, wall

27 hinge

28 door

29 lid

30 inlet roller inlet gap

film brake

first part

second part

camp

Rotary and / or pivot axis

handle

Closure, quick release

shutter

Rotary axis, in particular removable axis of rotation

Cutting and gluing table

first clamping means

second clamping means

infeed roller

outfeed roller

Adhesive, suction box

Cover, perforated plate

commitment

blind plug

cutting guide

rotating body

Swivel bearings, roller bearings

axis of rotation

bearing seat

Weld, laser weld

Supply roll of the sub-film web

first end of the roll

second end of the roll

frame

Claims

claims:

1 . A packaging machine (1), which unrolls a lower film web (8) from a supply roll (52) and intermittently or continuously transported along the packaging machine, thereby forming in a forming station (2) packaging troughs (6) in the lower film web (8), which then with a Packaged goods (16) are filled, wherein subsequently in a sealing station (15) an upper film web (14) is sealed to the lower film web (8), wherein the upper film web (14) of a

Supply roll (22) is unrolled, characterized in that downstream of at least one supply roll (22, 52) a dancer (20) is provided, which has at least one, preferably two rollers (23.1, 23.2) which on a linkage (23.4) are provided, which is driven by a rotary drive rotates about an axis of rotation (23.3) and thereby stores a certain length of film web (8, 14) and / or generates a desired tension in the film web (8, 14).

2. Packaging machine (1) according to one of the preceding claims, characterized in that a means detects the angular position of the linkage (23.4).

3. Packaging machine (1) according to one of the preceding claims, characterized in that the rotary drive is a pneumatic drive, a servo or a stepper motor or a rotary motor with gear.

4. Packaging machine (1) according to one of the preceding claims, characterized in that at least one roller (23.1, 23.2) at its two

is mounted opposite ends (53, 54).

5. Packaging machine (1) according to claim 4, characterized in that support both bearings on a wall (26).

6. Packaging machine (1) according to one of the preceding claims, characterized in that the rollers (23.1, 23.2) are grounded.

7. Packaging machine (1) according to one of the preceding claims or according to the preamble of patent claim 1, characterized in that downstream of the dancer (20) a film brake (32) is provided.

8. Packaging machine (1) according to claim 7, characterized in that the

Foil brake pivotally, in particular about a vertical axis (34) is pivotally mounted.

9. Packaging machine according to one of claims 7 or 8, characterized

characterized in that the film brake has a first and a second part (32.1, 32.2), which are provided by an axis (38) movable, in particular rotatable to each other.

10. Packaging machine (1) according to one of the preceding claims or according to the preamble of patent claim 1, characterized in that it comprises a cutting and gluing table (39).

1 1. Packaging machine (1) according to claim 10, characterized in that the cutting and gluing table (39) has recesses connected to a vacuum means.

12. Packaging machine (1) according to claim 1 1, characterized in that the recesses are optionally equipped with a suction means (44) or a blind plug (45) can be fitted.

13. Packaging machine (1) according to one of the preceding claims or according to the preamble of patent claim 1, characterized in that it comprises rollers (22, 23.1, 23.2, 30, 42, 43) in which the axis of rotation (49) by means of a laser weld (51) is connected to the rotary body (47) of the roller.

14. Packaging machine (1) according to claim 13, characterized in that the roller (22, 23.1, 23.2, 30, 42, 43) has a pivot bearing (48) which is grounded.

15. A method for threading a film web into a dancer, characterized in that its rollers (23.1, 23.2) can be converted into a threading position.

16. The method according to claim 15, characterized in that for threading the

Film web in a film brake a part (32.2) of the film brake away from another part (32.1) of the film brake, in particular, is rotated away.