EP3793908A1

EP3793908A1 - Unwinding a film roll in a packaging machine

Info

Publication number: EP3793908A1
Application number: EP19728327.8A
Authority: EP
Inventors: Jochen REHN; Frank SABATO
Original assignee: GEA Food Solutions Germany GmbH
Current assignee: GEA Food Solutions Germany GmbH
Priority date: 2018-05-18
Filing date: 2019-05-20
Publication date: 2021-03-24
Also published as: CN112262078A; WO2019219966A1; US11891202B2; US20210214110A1

Abstract

The present invention relates to a packaging machine that unwinds a lower film web from a supply roll and conveys it intermittently or continuously along the packaging machine, forming in a forming station packaging recesses in the lower film web, which are then filled with a product to be packaged, then an upper film web is sealed to the lower film web in a sealing station, the lower and the upper film webs being both unwound from respective supply rollers and both the lower film web and the upper film web being tensioned by respective dancer rollers. The present invention also relates to a method for producing a packaging.

Description

Rolling a film roll in a packaging machine

The present invention relates to a packaging machine that unrolls a sub-web from a supply roll and intermittently or continuously along the

Transporting packaging machine and thereby forms in a forming station packaging trays in the lower film web, which are then filled with a packaged, then in a sealing station a Oberfolienbahn is sealed to the lower film web, the lower and the upper film web are each unrolled from a supply roll and the lower - And the top film web are each stretched by a dancer. Furthermore, the present invention relates to a method for producing a

Packaging.

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.

For example, WO 2012/116823 discloses such packaging machines in which a lower film web is unrolled from a supply roll and preferably transported intermittently along the packaging machine. In a forming station, a packaging tray is first formed in the lower film web, which then with a

Packaged, in particular a food, is filled. 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, a dancer individually designed for the packaging machine had to be made available in each case, which was very time-consuming

has exposed. In addition, the web tension was subject to principle-induced fluctuations, which could be disadvantageous. The rolling movement of the films was preferred produced by the feed of the packaging machine and the tension generated by the dancer in the film.

WO 2016087169 A1 teaches an improved embodiment with a rotary dancer, wherein the top film web is unrolled from a supply roll and downstream of the supply roll, a dancer is provided, which preferably has two rollers which are provided on a linkage, which is driven by a rotary drive to a Rotates rotation axis and thereby stores a certain length of film web and / or generates a desired voltage in the film web.

It was therefore the object of the present invention to provide a packaging machine with a dancer and a method for producing a packaging whose / their field of application is significantly expanded and / or stresses in the respective film web are significantly reduced.

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 lower film web is sealed, wherein the lower and the upper film web are each unrolled from a supply roll and the lower and the upper film web are each stretched by a dancer, wherein the supply roll is driven by a motor whose parameters, in particular speed and / or torque , are adjustable by the parameters of the respective supply roll.

The statements made on this subject of the present invention apply equally to the other objects of the present invention and vice versa.

Features disclosed in this article of the present invention can be incorporated into the other articles.

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, unrolled from a supply roll and preferably

intermittently / intermittently transported along the packaging machine. In a forming station, this sub-web is then first heated and by means of a

Thermoforming tool packaging trays are formed in the lower film web. As a rule, a plurality of packaging troughs, which are arranged in a so-called format, are formed simultaneously and subsequently simultaneously along the packaging machine transported. 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. The person skilled in the art understands that the packaged goods can also be filled / laid in unshaped films.

Subsequently, the thus finished packaging is separated. The top film web is also unrolled from a supply roll. Based on the transport direction of the respective film web is located downstream of at least one supply roll, a dancer, which keeps the tension in the film web at least substantially constant. The dancer may be, for example, a linear or a rotary dancer or a

Swing arm dancers act.

The number of simultaneously produced packages and their length or width determine the length of the feed at a stroke, with up to 3 meters are quite common.

According to the invention, at least one, preferably both supply roll (s) is driven by means of a motor whose parameters, in particular rotational speed and / or torque, are adjustable on the basis of the parameters of the respective supply roll.

For example, the core diameter of the roll, the film width, the film thickness, the film length, the original and / or current weight of the supply roll, the original and / or current diameter of the supply roll and / or the specific film weight are taken into account. On the basis of one or more of these parameters of the respective supply roll, the currently required torque or the required rotational speed is calculated and the motor is controlled / regulated accordingly, in particular by a

Clock / feed required film length to provide.

The packaging machine according to the invention has the advantage that very small but also very large feed lengths can be realized without the film being mechanically stressed, for example stretched. Feed lengths from a few mm up to 3 meters or more can be realized without difficulty. The drive of the respective supply roll is preferably activated already from a feed of 0.1 mm. In the area of the upper film and / or lower film can on a film brake, for example, for the alignment of

Print marks are waived. Also, can be dispensed with a roller brake, since the engine itself also generates the braking effect, which then by a previous roller brake usual and unwanted abrasion is eliminated. With the packaging machine according to the invention can be processed very thin films.

Preferably, the packaging machine has a means that the speed of the respective film web, in particular the lower film web, preferably the

Speed history recorded during a preference / feed. Alternatively or additionally, the speed or the speed profile can be stored as data and / or data record in a controller of the packaging machine. The speed or the speed profile are preferably taken into account in the control / regulation of the drive motor of the respective supply roll.

Preferably, the motor is a servomotor or a torque motor. Preferably, the motor has a means, for example an incremental encoder, with which the rotational position of the output shaft of the motor can be detected. Preferably, the motor is a direct motor, i. a motor which is rotatably or torsionally rigid with the shaft on which the respective supply roll is mounted, is connected. Alternatively, between the motor and the shaft on which the supply roll is mounted, a stiff connection, such as a toothed belt provided.

A torque motor is a servo motor optimized for high torques. Torque motors are commonly built as brushless DC motors. In some cases, switched reluctance motors are also called torque motors.

Torque motors are external rotor (stator inside, rotor ("rotor") outside) or internal rotor (rotor inside, stator outside). External rotors are preferred in torque motors because they have a larger torque available due to the relationships shown below with the same size. The high torque of torque motors enables high accelerations and leads to high dynamics of the system.

Torque motors have a higher drive stiffness than classic motor-gear units and preferably no backlash. This results in better ones

Control properties due to reduced disturbance variables and increased repeat accuracy.

With large supply roll diameter, high torques and high speeds are required for small supply roll diameter in order to drive the film roll according to the preferred speed of the packaging machine. Both can be realized with a servo and / or torque motor.

Preferably, the dancer points downstream of the respective supply roll

is provided, a motion sensor, in particular rotary encoder, on. The signal of this motion sensor is preferably used to control the motor. Alternatively or additionally, the signal of this motion sensor, in conjunction with the incremental encoder of the drive motor of the respective supply roll used to determine the diameter of the supply roll, in particular the initial diameter after a supply roll change. As a result, the diameter can be determined automatically in the event of a supply roll change without having to be measured by a worker. This value is then taken into account when setting the parameters of the drive motor of the drive shaft of the supply roll. Preferably, also in operation, at, before or after each clock or after a certain number of clocks of the current

Determined diameter of the film roll and in the adjustment of the parameters of the drive of the supply roll, especially in the adjustment of the torque, the speed and / or in the number of increments, which is to turn the drive shaft of the supply roll, taken into account. Preferably, the determination of the roll diameter is carried out at each preference / feed, the control / but not at each clock one

updated value, but more rarely, for example, only every 3 - 7 clock and then most preferably an average of the measurements forms, for example, to avoid a miscalculation.

According to a preferred embodiment of the present invention, the shaft is mounted at both ends, wherein a bearing is preferably pivotally, for example, about a vertical axis pivotally provided to be able to easily perform a supply roll change can.

Yet another object of the present invention is a packaging machine which unrolls a lower film web from a supply roll and intermittently or continuously transported along the packaging machine and thereby preferably forms packaging trays in the lower film web in a forming station, which are then filled with a packaged goods, wherein subsequently in a sealing station a Oberfolienbahn to the

Subfilm web is sealed, wherein the lower and the upper film web are each unrolled from a supply roll and the supply roll is rotatably mounted on a shaft, wherein the rotation of a film web is rolled in a direction, and wherein the shaft is slidably provided along its longitudinal central axis.

Features disclosed in this article of the present invention can be incorporated into the other articles. Preferably, the shaft is longitudinally displaced during production, in particular to align an edge of the film web, for example, relative to the frame of the packaging machine and / or to the film transport.

The shaft may be displaced relative to its storage and / or storage relative to the frame of the packaging machine.

Preferably, the adjustment of the shaft by an actuator.

Preferably, the shaft is driven by a motor, in particular a torque motor. This motor can be provided fixed or be co-displaced together with the shaft. In the event that the motor is provided stationary, preferably a clutch, in particular a sliding clutch is provided between the shaft and the motor.

Preferably, the packaging machine has a sensor which detects the position of

Film web, for example, relative to the frame of the packaging machine or the transport of the film web recognizes. For example, the sensor is a web edge detection means.

Preferably, the sensor controls the actuator which longitudinally displaces the shaft.

Furthermore, the object is achieved with a method for producing a packaging with a packaging machine, which unrolls a lower film web from a supply roll and intermittently or continuously transported along the packaging machine and preferably forms in a forming station packaging trays in the lower film web, which are then filled with a packaged , wherein subsequently in a sealing station an upper film web is sealed to the lower film web and the lower and the

Upper film web are each unrolled from a supply roll and the lower and the upper film web are each stretched by means of a dancer, wherein the supply roll is driven by a motor driven.

In this object of the present invention, the rolling of the film web takes place at least substantially by means of a motor which rotatably drives the respective supply roll and not as in the prior art by a movement of transport chains, which transport the lower film web along the packaging machine or by means of Underfilm web to which the top film is sealed. Also, a support of the rolling movement is not sufficient according to the present invention. The motor also preferably acts as a brake to prevent unintentional unwinding of the film web from the supply roll.

Preferably, the supply roll, at least substantially, according to a

Feed rate of the sub-film web unrolled. For example, a controller has data about the preferred length and / or the velocity profile of the feed. Accordingly, the rotation speed of the supply roll is adjusted. Since the drive of the supply roll is preferably a torque motor with a very large torque, the drive can respond dynamically also to an indexed drive.

Preferably, the parameters of the motor that drives the respective supply roll, in particular the rotational speed, the number of increments that the output shaft of the engine is to rotate and / or the torque, based on the parameters of the supply roll,

in particular their weight and / or their diameter set, wherein preferably the respective current weight or the respective current diameter of the supply roll is taken into account, which changes with each preference. Particularly preferably, at least during a film change, the diameter and / or the weight of the supply roll are automatically determined or in the control / regulation of the packaging machine

entered.

Preferably, the dancer has a motion sensor, in particular a rotary encoder. On the basis of the signal of the motion sensor and the incremental encoder of the motor that drives the supply roll, the original or beginning or current

Diameter of the film roll are determined. Preferably, the signal of the

Motion sensor used to control the engine, for example, calculated by the torque, the rotational speed and / or the rotational length of the output shaft of the motor that drives the supply roll and the engine accordingly

is controlled / regulated.

Preferably, at least during the automatic unwinding of the supply roll, a deviation of the actual position from the set position of the dancer system is detected and from this a correction value to the previously calculated rolling speed / torque is determined and taken into account. As a result, for example in the case of an undesirably high deviation of the position of the dancer from the desired position, the drive of the supply roll can be accelerated or reduced so that the dancer returns to the desired desired position.

Preferably, the nominal width of the slides is entered or read out automatically. According to a further preferred embodiment of the present invention, the original supply roll parameters are taken from a database and / or a data carrier. For example, in the database, the slide width, the

Stock roll weight, the supply roll diameter, the length of the film web and / or the inner and / or outer diameter of the core may be included. The data can be arranged, for example, on a data carrier arranged on the supply roll, for example a transponder. The supply roll can also be a

Identification means, for example, a bar or QR code, based on which the data is retrievable from a database.

Preferably, based on the parameters of the supply roll and / or a detected

Abrollhistorie the remaining length of the film web determined. Based on this known residual length, for example, the approaching end of the film can be displayed to the operator and / or initiate an automated film change.

Yet another object of the present invention is a method in which a

Unwinding sub-web from a supply roll and transported intermittently or continuously along the packaging machine and optionally forms in a forming station packaging trays in the lower film web, which are then filled with a packaged, then in a sealing station a Oberfolienbahn is sealed to the lower film web, wherein the sub and the upper film web are each unrolled from a supply roll and the supply roll is rotatably mounted on a shaft, wherein the rotation of a film web is unrolled in a direction and wherein the shaft is displaced along its longitudinal central axis.

The statements made on this subject of the present invention apply equally to the other objects of the present invention and vice versa. Features disclosed in this article of the present invention can be incorporated into the other articles.

The inventions will be explained below with reference to FIGS. 1 to 4. This

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.

FIG. 2 shows a supply roll drive with a toothed belt. FIG. 3 shows a torque motor

Figure 4 shows the Folienrollollung a packaging machine.

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 22 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 / feed length. For this purpose, the packaging machine has two transport means (not shown), in the present case, two endless chains, on the right and left of the

Sub-web 8 are arranged. Both at the beginning and at the end of the

Packaging machine is provided for each chain in each case at least one gear 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 means has a plurality of clamping means which grip the lower film web 8 in the inlet region 19 in a clamping manner and transmit the movement of the transport means to the lower film web 8. In the outlet region of the packaging machine, the clamping connection between the transport and the lower film web 8 is released again. Downstream of that

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, which 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 subsequent sealing station 15, which likewise consists of an upper tool 12 and a vertically adjustable lower tool 11, a top film 14 is firmly bonded to the lower film web 8 by sealing. As a result, the movement of the lower film web 8 is transferred to the upper film web 14. 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 extend only in front of the sealing station and possibly downstream. Otherwise, the statements that apply were made to the means of transport of the lower film. The upper foil can also be warmed up with a heating medium and deep-drawn. For sealing is provided as a lower tool 11, for example, a heatable sealing frame having per packaging tray an opening into which the packaging tray during sealing, ie in the

Upward movement of the lower seal tool dips. For sealing, the upper and the lower film web between the upper and the lower tool 12, 1 1

compressed and combine 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 is a dancer 20, here a rotary dancer provided, the film web 14 holds possible at a constant voltage. Of the

One skilled in the art will understand that multiple topsheets may be present, for example, a multi-layered package or a multi-top film package. Preferably, a dancer is then provided in the course of each top sheet. The person skilled in the art also understands that a dancer is preferably also provided in the region of the lower film, preferably downstream of the supply roll 22. The dancer is preferably a linear dancer. Before and / or when sealing the upper film to the lower film, 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.

According to the invention, at least one supply roll 21, 22 is driven by a motor, in particular a torque motor, so that the length of the respectively required feed of the respective film web is unrolled from the roll, without the tensile force of the two transport means, the transport chains and / or the Traction of the sub-web to the Oberfolienbahn is transmitted significantly. As a result, the respective film web is exposed only to a comparatively low voltage and is thus not pre-stretched and throws no wrinkles. With the packaging machine according to the invention or with the

According to the invention, comparatively thin film webs can also be processed. No film brake is required for the top film web to match the position of the print marks on the top film to the location of the troughs in the bottom film web adapt. The dancer only has to be designed for very small movements or a very low or no film web storage volume.

Preferably, the rotation of the motor which drives the supply roll 21, 22 is controlled by a computer means, which may be part of the packaging machine or part of a line control. In particular, the rotational speed of the supply roll is controlled so that the unwound film web length corresponds to the feed and / or that the speed profiles of the unwinding of the film web and / or the feed of the

Means of transport, in particular the transport chains is at least substantially identical. Here, the respective current diameter or the current weight of the

Reservoir taken into account.

Preferably, the dancer is provided with a motion sensor, such as a rotary encoder or a linear, with which it can be determined which stored

Foil length corresponds to the movement of the dancer. This information can be used, for example, to determine the diameter of the supply roll.

Preferably, a dancer is provided in the region of the lower and the upper film web. Preferably, the supply roll of the lower film and / or the upper film web is driven by a motor so that the unwinding of the respective film web with a motor drive takes place so that the respective film web is at most insignificantly tensioned.

2 shows a first embodiment of the drive of the development of the supply roll 21,

22. In the present, between the motor 25, here preferably a torque motor, connected by means of a toothed belt to the drive shaft 23 of the supply roll. The

Supply roll is in turn rotatably connected to the drive shaft 23. Through this

Rotary drive is the rotational movement of the motor without slippage on the shaft on which the supply roll is mounted, transmitted.

Figure 3 shows a so-called direct drive, in which the output shaft of the motor is directly connected to the rotary shaft of the supply shaft. The engine is a torque motor.

FIG. 4 shows a further embodiment of the packaging machine according to the invention, it being possible to refer essentially to the embodiments according to FIG. The supply roll 21, 22 is mounted on a shaft 23, preferably non-rotatable and / or not axially displaceable. The shaft 23 rotates when rolling the lower and / or Upper film web 8, 14 in the direction indicated by the arrow 40 direction. The shaft 23 is preferably rotatable in the region of its two ends by means of a bearing 31 and optionally also mounted longitudinally displaceable. A bearing 31 may be provided, for example, on the housing of the film processing or the packaging machine. For a longitudinal displacement, the bearing 31 may be designed as a plain bearing. The shaft 23 is preferably driven in rotation by means of a motor 25. Between the motor 25 and the shaft 23, a clutch 26, for example a sliding clutch or a transmission, preferably a sliding gear, may be provided. According to the invention, the shaft 23 alone and / or the frame 29, on which the shaft 23 of the film unwinding is mounted, are longitudinally displaceable, as symbolized by the arrow 37 and / or provided transversely to the transport direction 40 of the film web. For example, the frame 29, on which the shaft 23 and the motor 25 is provided, longitudinally displaceable, for example, along a guide 32, is provided. The movement 37 is effected, for example, by an adjusting drive 35, which moves at least the shaft 23 along its central axis, but preferably also additionally the frame 29. The skilled person understands that even the drive motor 25 can be moved in the longitudinal displacement, but not necessarily. The bearing 32-34 is preferably arranged on a, in particular stationary, base frame 28.

Preferably, the packaging machine according to the invention has a sensor 39, which is preferably a web edge detection means. This web edge detection means 39 detects the position of the web edge, for example relative to the frame of the packaging machine or any other preferably stationary location. If the web edge is beyond a desired limit, preferably the adjustment drive 35 is activated, which then moves the shaft 23 or the frame 29 in the direction symbolized by the arrows 37 until the film web is again within the desired limit.

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, 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, web

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 supply roll of the sub-web

23 shaft of the supply roll

24 drive means, toothed belt

25 engine, torque motor

26 Clutch, Sliding Clutch

27 motor shaft

28 base frame, packaging machine

29 Support, adjustable frame

30 door, bearing housing, frame

31 bearings, plain bearings

32 guide, guide bar

33 bearings, plain bearings

34 bearing block, bearing housing Adjusting drive, motor, geared motor, spindle motor, servomotor spindle, shaft, adjusting means, sliding means

Adjustment direction, sliding direction

Web edge, foil edge, web edge

Sensor, web edge detection means

Transport direction, film direction, web direction

Claims

claims:

A packaging machine (1) which unrolls a bottom film web (8) from a supply roll (22) and transports it intermittently or continuously along the packaging machine and thereby preferably forms (4) packaging troughs (6) in the bottom film web (8) can also use unshaped foil for

Application), which are then filled with a packaged product (16), wherein subsequently in a sealing station (15) an upper film web (14) is sealed to the lower film web (8), wherein the lower and the upper film web (8, 14) respectively from a supply roll (21, 22) are unrolled and the lower and the upper film web are each stretched by a dancer (20), characterized in that the supply roll (21, 22) is driven by a motor whose parameters, in particular speed and / or torque, based on the parameters of the respective supply roll are adjustable.

2. Packaging machine according to claim 1, characterized in that the motor is a torque motor.

3. Packaging machine according to at least one of claims 1 or 2, characterized in that the dancer has a motion sensor, in particular rotary encoder, and that the signal of the motion sensor is used for motor control / control.

4. A packaging machine (1) which unrolls a lower film web (8) from a supply roll (22) and transports intermittently or continuously along the packaging machine, preferably forming packaging troughs (6) in the lower film web (8) in a forming station (2) then be filled with a packaged product (16), wherein subsequently in a sealing station (15) an upper film web (14) is sealed to the lower film web (8), the lower and the

Upper film web (8, 14) in each case by a supply roll (21, 22) are unrolled and the supply roll (21, 22) is rotatably mounted on a shaft (23), wherein by the rotation of a film web (8, 14) in a running direction ( 40) is unrolled, characterized in that the shaft (23) is slidably provided along its longitudinal central axis.

5. A method for producing a packaging with a packaging machine (1) which unrolls a lower film web (8) from a supply roll (52) and transported intermittently or continuously along the packaging machine and thereby in a forming station (2) packaging troughs (6) in the lower film web (8) preferably forms, which are then filled with a packaged product (16), wherein subsequently in a sealing station (15) an upper film web (14) is sealed to the lower film web (8), wherein the lower and the upper film web (8, 14) each of a Supply roll (21, 22) are unrolled and the lower and the upper film web are each stretched by means of a dancer (20), characterized in that the supply roll is driven by a motor driven unrolled.

6. The method according to claim 5, characterized in that the supply roll,

at least substantially, according to a feed speed of the lower film web (8) is unrolled.

7. The method according to claim 5 and / or 6, characterized in that parameters of the motor, in particular the rotational speed and the torque, on the basis of the parameters of the supply roll (21), in particular the diameter and the weight of the supply roll (21) can be adjusted.

8. The method according to at least one of claim 5 - 7, characterized in that at least during a film change, the diameter and / or the weight of the supply roll (21) are determined.

9. The method according to at least one of claims 5- 8, characterized in that at least during the automatic unwinding of the supply roll, a deviation of the actual position is detected to the desired position of the dancer system and determines therefrom a correction value to the previously calculated Abrollgeschwindigkeit / - torque and taken into account becomes.

10. The method according to at least one of claim 5 - 8, characterized in that the dancer has a motion sensor, in particular a rotary encoder, and that the signal of the motion sensor is used for motor control / control.

1 1. The method according to at least one of claim 5 - 10, characterized in that the nominal width of the slides enter or automatically read.

12. The method according to at least one of claim 5 - 1 1, characterized in that the Vorratsrollenparameter a database and / or a data carrier are removed.

13. The method according to at least one of the claims 5 - 12, characterized

in that the residual length of the film web (8, 14) is determined on the basis of the parameters of the supply roll and / or a recorded roll-off history.

4. A method in which a lower film web (8) from a supply roll (22) rolls and transported intermittently or continuously along the packaging machine and thereby forming in a forming station (2) packaging troughs (6) in the lower film web (8) preferably, which then with a packaged product (16) are filled, wherein then in a sealing station (15) has a top film web (14) to the

Subfilm web (8) is sealed, wherein the lower and the upper film web (8, 14) each from a supply roll (21, 22) are unrolled and the supply roll (21, 22) is rotatably mounted on a shaft (23), wherein the rotation of a film web (8, 14) in a running direction (40) is unrolled, characterized in that the shaft (23) is displaced along its longitudinal central axis.