DE19603371B4 - Tubular bag machine with an asymmetric forming shoulder for the production of tubular bags - Google Patents

Abstract

Fill and seal machine with a supply roll (15) and deflection rollers (16) for feeding a flat Film web (17) to an asymmetric form shoulder (18), wherein the collar chest parts (46, 47) of the forming shoulder (18) are different long and the longer collar bust (47) about through the longitudinal axis (48) the shoulder sleeve (49) and the middle of the collar neck part (50) going median plane the Form shoulder (18) led out is, with a film take-off (19) for transporting the film web (17), a filling tube (20) for receiving the film web converted into a film tube (21) (17), a longitudinal welding device (22) for producing a longitudinal seam (2) on the film tube (21), with a transverse welding device (24) for generating of cross-seams (3, 4) and with a separating device for severing the film tube (21), characterized in that one parallel to the jaws (23) aligned, with the filling tube (20) connected, radially from the filling tube (20) pioneering flat expansion element (27) is provided, that the spreader (27) in a plane with the sealing surfaces (26) of the closed Baking (23) lies, ...

Description

The The invention relates to a tubular bag machine with a Supply roll and deflection rollers for feeding a flat film web to an asymmetrical form shoulder, with the collar chest parts the form shoulder are different in length and the longer collar chest part over the through the longitudinal axis the shoulder sleeve and the medial plane of the form shoulder going the middle of the collar-neck part led out is, with a film removal for transporting the film web, a filling tube for Recording the converted into a film tube film web, a Longitudinal welding device for Generation of a longitudinal seam on the film tube, baking a transverse welding device for generating of cross seams and with a separator for severing the film tube.

It are tubular bag machines with a Seitenfalterzeuger known in which a gusset in a film tube by a movable gusset punch is produced. Also are mutually movable Seitenfaltstecher known, the two opposite Punch gussets in the film tube. Such bagging machines produce tubular bags with a gusseted or with two gussets. The tubular bags are welded on the head side and bottom side in the form of transverse seams. The Gussets are only welded in the transverse seams. Of the Disadvantage of such known tubular bag machines with a gusset punch or with two gusset punches is that the produced tubular bag although due to the gussets are relatively stable to deformations, but that for many Areas of application require further stability.

From the US 4,194,438 is a tubular bag machine with an asymmetric form shoulder of the type mentioned above. In this case, the forming shoulder serves to offset the longitudinal seam of a tubular bag with a rectangular cross section to the edge of the tubular bag in order to avoid a longitudinal seam running centrally on a side surface of the tubular bag. This makes it easier to use the surface of the side surface for product information. From the US 3,426,499 is also known an arrangement for laying the longitudinal seam in a corner of a cuboid pin. Devices like the ones US 4,194,438 and the US 3,426,499 describe, have the disadvantage that their longitudinal seams prevent buckling of the corners of the tubular bag only slightly.

The EP 0 135 892 B1 describes a sealing device for sealing four sides of a package in a vertical packaging machine, in which is parallel to the welding jaws connected to the filling tube, radially away from the filling tube facing flat expansion element is provided which lies in a plane with the sealing surfaces of the closed sealing jaws. In this case, the film should be placed around the expansion element, including the tubular bag machine is stopped for subsequent welding and thus an intermittent operation is present. By moving the film around the spreading element, radial stresses can occur within the film, which can lead to damage of the film. Therefore, special measures are required for the welding process, which can only be carried out during standstill of the machine or requires a supply of a film material in excess in order to carry out the expansion of the film by the expansion element can. However, this leads to problems in the area above the spreading elements in the region of the filling tube and can have a considerably negative influence on the entire functional sequence.

It Object of the present invention, a tubular bag machine of the type mentioned above to provide with the tubular bag with a bottom-side seam and a significantly reduced Einknickrisiko and no the printed image of the side surfaces disturbing longitudinal seam produced can be wherein this bagging machine also be designed should that the Tubular bag without the risk of damage during the manufacturing process in one possible continuous operation are producible.

To solve this problem, the tubular bag machine of the type mentioned is characterized in that a parallel to the jaws 23 aligned, with the filling tube 20 connected, radially from the filling tube 20 groundbreaking flat expansion element 27 is provided that the expansion element 27 in a plane with the sealing surfaces 26 the closed cheeks 23 is located, and that in the direction of film transport the expansion element 27 downstream of the welding device 22 is provided, which is directed against the deflected hose edge, wherein in the direction of transporting the expansion element 27 on a part of the filling tube 20 is provided, the one opposite one of the forming shoulder 18 adapted, through the top 51 the longer collar chest part 47 certain format 43 a reduced format 45 has, and that the spreader 27 in the withdrawal direction of the film web at a distance from the forming shoulder 18 on the part of the filling tube 20 with the reduced format 45 is provided.

The tubular bag machine according to the invention has the advantage that the tubular bag with high accuracy at high relative machine power can be made. This can also be done in a continuous operation. By the taper of one of the form shoulder adapted format to a reduced format with the proviso that the spreading elements are connected to the part of the filling tube having the reduced size, it is achieved that during the preferably continuous manufacturing process, the radial tension of the film tube in about can be kept constant. In this case, even with continuous processing of the film tube, the risk of damage within the film tube to keep extremely low. The longitudinal welder heats and compresses the area of the weld. The arrangement of the expansion element in a plane with the sealing surfaces of the closed jaws serves a precise film run and an accurate edge arrangement of the weld. The asymmetrical form shoulder serves the marginal arrangement and thus an undisturbed, serving as an information surface side surface.

With the tubular bag machine according to the invention can be flat Make a tubular bag with one parallel to the edge of the tubular bag as a longitudinal seam configured weld. In the filled Condition, such a tubular bag has a significantly reduced Buckling behavior around a bending line running parallel to the transverse seams, because the parallel to the longitudinal seam running edge weld improves the stiffness of the bag. Due to the edge welding of the lying on top surfaces In addition, a Verscherung on top surfaces against each other is largely prevented so that the Tubular bag stable upright on its bottom side seam can be placed in a tray and also in an unfilled row has a significantly reduced buckling behavior. An edge-sided longitudinal seam allows better use of the side surfaces of the tubular bag, e.g. by means of continuous, not disturbed by the longitudinal seam coating.

One after the tubular bag machine according to the invention manufactured hose bag can also be a longitudinal seam and perpendicular to the longitudinal seam and parallel to each other, the tubular bag head side and bottom-closing cross stitching and have a gusset. At the two parallel to the longitudinal seam running edges the gusset of the tubular bag can each provide a weld become. The longitudinal seam can run to the right edge. A tubular bag with a such gusset is more stable due to its peripheral welds across from a deformation as a simple tubular bag with gusset. For the production of this tubular bag is a separate supply of stiffening material not necessary, since only the already supplied material of the film tube welded becomes. The produced tubular bags can be done relatively quickly a filling be relieved because the e.g. still warm welds on the edges of tensile forces, which act parallel to the welds, can not be raised, because the welds are not must meet the requirements of a tightness. The marginal longitudinal seam serves an improved use of the side surfaces of the tubular bag as Information area.

are as a longitudinal welding device a radiant heater and a closing device are provided so is achieved that the heat input cold-free in the packaging film he follows. This is an advantage because of the still open longitudinal area the film tube no impairment of its shape and no Retention forces experiences its heat absorption. The heated longitudinal seam is then pressed by pressure application. This pressure application can by means of a roller which itself is driven synchronously to the film transport can be pressed become. If the wheel is driven, the longitudinal seam distorting forces are minimized. But instead of a wheel can also be a relatively simple closing device such as. a press bar be used.

At the tubular bag machine according to the invention can analogous to claim 3, two spreading elements may be provided which are in opposite directions from the filling tube have away, with each spreader in the direction of film transport a radiant heater and a closing device are arranged downstream. With such a configuration of the tubular bag machine Tubular bag produced with two edge-side welds. The use of two symmetrical, arranged to the central axis of the filling tube spreading elements also has the consequence that the Forming and the friction forces at the production of marginal welds on both sides of the filling tube are equal to the expansion elements and thus the film run is not disturbed becomes.

is the radiant heater at an acute angle to the surface of the filling pipe arranged and reduces the clear distance between the radiant heater and the filling tube in the film transport direction, the melting of the plastic takes place more gently and it is the possibility given by an angle change the welding parameters to change.

As a radiation heater, a longitudinal sealing jaw oriented in the direction of film transport or an infrared radiation coil can be used. The efficiency of an infrared radiation coil can be significantly increased, and a precise irradiation zone is achieved when, according to An claim 7, the infrared radiation coil is surrounded on three sides by a reflective on the film tube, curved mirror.

is as a welding device a pair in opposite directions, the weld between their lateral surfaces provided clamping rollers, so the welding of a melted longitudinal seam done solely by the roller pressure. The roles can be independent of be arranged stationary in the operating mode of the tubular bag machine. The Rollers can also be designed with or without drive. Is a drive provided, so the rollers are to be driven at a rotational speed, the the withdrawal speed of the film deduction corresponds.

It does not come to any disturbing Adhesion of molten plastic of the film on the lateral surfaces of the Rolls when the lateral surfaces according to claim 10 have a coating with polytetrafluoroethylene.

is as a longitudinal welding device provided a circulating around two rollers heat sealing strip is so one more way given, a distortion-free welding of a peripheral longitudinal seam perform. The heat seal tape is driven at the same speed as the bag machine weiterbewegte foil tube and welded this particularly accurate, as it is the open longitudinal slot the film tube also stabilized and fixed in place.

A compact design of the aggregates on the filling tube is possible, and a reliable one Film removal is achieved when the film take two opposite Has circumferential discharge belt, which is 90 ° relative to the expansion element or the spreading elements on the filling tube are offset. The trigger belts and the spreading elements can even be arranged in a plane, whereby the aggregates take-off belts and spreading achieve their densest construction. In addition, will be Delaying forces on Foil tube here relatively well balanced.

Area Tubular bag with thoroughly by welded Gusset can be generated when the expansion element as a double spreading with one between the Einzelspreizelemente of Doppelspreizelements engaging side gusset generator is configured. The single spreading elements can be parallel to each other, at the filling tube be fortified Spreizbleche, in which a aligned towards the filling tube, engaged as a folding wire gusset engages.

is in a gusset of the film tube, a cooling plate inserted against that the welding device works, so can both edge welds the Gusset be welded against the heat sink. The heat sink serves only to prevent a Vierlagenverschweißung. The welding equipment acts on both sides against the heat sink. This is a welding pressure be applied. On each side of the cooling plate, a marginal weld is generated. The foil can along the cooling plate slide. An adhesion of molten foil plastic on heatsink can be prevented by the cooling plate is a polytetrafluoroethylene containing, outer view having. The heat sink may also be the gusset generator, creating a separate gusset generator becomes unnecessary. But it is still a Doppelspreizelement provided in the direction of film transport leading gusset producers, so the film run is further stabilized.

The Format of the filling tube is in the direction of film transport to the format of the forming shoulder or to the effective format of the filling tube in connection with the form shoulder in the transfer area of the form shoulder to the filling tube customized, so that the filling tube adapted from that of the form shoulder Rejuvenated format. The Doppelspreizelemente are connected to the part of the filling tube, which reduced the size Format, wherein the difference of the radii of the different Formats preferably in about two-thirds of the radial extent of Doppelspreizelementes or 1.5 times the radial extent of a corresponds to the two Doppelspreizelemente. The film tube has then along the filling tube including the Forming shoulder transfer area an approximately constant spreading state, since the filling tube in the Form shoulder area along with this the format of the form shoulder and then merges into a reduced format on which the Doppelspreizelemente are arranged. The film tube is therefore of the larger format transported to the smaller format. This allows the radial Keep tension in the film tube constant, as the format difference is to compensate by the expansion elements.

is the film take-off continuously driven, so the heat radiation with a permanently fixed radiant heater with constant radiant power done without that the melting effect in the film changes. Withdrawal speed, heating distance, Radiation power and cooling behavior the film could Here are particularly well matched. similar welding conditions are especially given when the radiant power of the radiant heater is proportional to the rotational speed of the film take-off.

Since the format in the film transport direction tapers from a format adapted to the form shoulder to a reduced format, wherein the Spreizelement or the spreading is connected to the part of the filling tube or are, which has the reduced size and wherein the difference of Füllrohrradien the different formats in about half the radial extent of the two expansion elements, the film tube along the filling tube in an approximately constant spreading state.

in the Course of the filling tube The film tube is of larger format transported. The spreading element or the spreading elements is or are provided on the smaller format and extend approximately so far radially outward, that she compensate for the format difference.

The Stiffness of the flat tubular bag is further increased when at both parallel to the longitudinal seam running edges Welds provided are.

In a marginal weld a gusset may be provided, the amount of the width the gusset corresponds to at least the amount of half the width of the weld. Here, the welding takes place of four superimposed film areas. The weld is so far relatively thick and stiff. Is the width of the gusset too low, that is significantly less than half the width of a weld, so it may happen that the Gusset not reliable be welded can. The marginal weld can be made in a relatively small width, as it does not have a sealing function exercises.

The edge weld can also be further strengthened be, if an additional Foil strip with the weld welded becomes. The foil strip can be placed on the outer foil surface or, in the case of a gusseted gusset, in the gusset be inserted.

The Stiffness of the tubular bag is further increased when parallel to both extending to the longitudinal seam Gussets each with the two edges of a gusseted with a weld are provided.

Does the longitudinal seam in a marginal weld, so there is the advantage that only one fusing is sufficient for both the longitudinal seam, as well as the marginal weld to generate bag stiffening.

The stability will be increased further and his free stamina is achieved when the tubular bag as a stand-up pouch with a Stand floor is formed.

in the The following is the tubular bag machine according to the invention based on embodiments described in more detail. It shows:

1 in a side view of a flat tubular bag with at both parallel to the centrally disposed longitudinal seam edges extending the tubular bag extending welds;

2 in a section along A / A the flat tube bag the 1 ;

3 in a section analog 2 a flat tubular bag having a longitudinal seam running in the edge-side weld and each having a side fold in a peripheral weld seam;

4 in a section analog 2 the flat tube bag the 3 , but each with an additional film strip in the peripheral welds;

5 in a perspective view of a tubular bag with two side folds and with at both edges of the two, parallel to the centrally arranged longitudinal seam extending welds;

6 in a section along B / B the tubular bag the 5 ;

7 in a perspective view of a stable tubular bag with gussets and marginal welds;

8th in a horizontal section, a filling tube with a film tube of a vertical tubular bag machine, with two Doppelspreizelemente, and each with a engaging in a Doppelspreizelement gusset producer for producing a tubular bag accordingly 5 or 7 ;

9 in a side view of the principle of a tubular bag machine for producing a tubular bag analog 1 with an asymmetrical forming shoulder for forming a flat film web into a film tube, a tapered filling tube, two flat spreading elements, which lie in a vertical plane with the sealing surfaces of closed, circumferential jaws of a transverse welding device, and with radiant heaters and sealing devices directed against the deflected tube edges;

10 in a side view rotated by a right angle in the horizontal plane Flow wrapping machine 9 , such as

11 in a section designed as an infrared radiation coil with a mirror radiant heater.

A flat tube bag 1 has a marginal longitudinal seam 2 and perpendicular to the longitudinal seam 2 and parallel to each other, the tubular bag 1 head side and bottom side closing cross seams 3 . 4 , At the two parallel to the longitudinal seam 2 running edges 5 . 6 the tubular bag 1 are welds 7 . 8th provided, which one on the bottom-side seam 4 erected tubular bag 1 give extra stiffness to buckling. The longitudinal seam 2 runs on the edge 5 the tubular bag 1 , At the welds 7 . 8th and the cross seams 3 . 4 are the inner surfaces of the film 9 welded together.

In a further embodiment ( 3 ) is at both marginal welds 7 . 8th one gusset each 10 . 11 intended. The amount of width of a gusset 10 . 11 corresponds approximately to the amount of the width of a weld 7 . 8th , For the purpose of another each a foil strip 12 . 13 be welded from weldable plastic ( 4 ).

The flow wrapper 14 ( 9 . 10 ) for the production of flat tubular bags 1 has a supply roll 15 and pulleys (schematized by a pulley 16 ) for feeding a flat film web 17 to an asymmetric form shoulder 18 , A film print 19 transports the film web 17 , A filling tube 20 takes those to a film tube 21 formed film web 17 on. Through the filling tube 20 the filling of the flat tubular bag takes place 1 ,

By means of a longitudinal welding device 22 that has a radiant heater 28 and a closing device 29 receives, the longitudinal seam 2 of the film tube 21 educated. The transverse seams 3 . 4 the flat tube bag 1 be with rotating cheeks 23 a transverse welding device 24 generated and with cutting knives 25 as a separator of the film tube 21 separated.

Parallel to the sealing surfaces 26 the baking 23 aligned and in a plane with the sealing surfaces 26 the closed cheeks 23 are with the stuffing tube 20 connected, radially from the round filling tube 20 pointing away, flat spreading elements 27 intended. The spreading elements 27 steer the edges 5 . 6 of the film tube 21 out. On these edges 5 . 6 act radiant heaters 28 to the edges 5 . 6 melt. Every radiant heater 28 closes in the direction of film transport a closing device 29 for compressing the molten edges 5 . 6 at.

The radiant heaters 28 are as longitudinal sealing jaws 30 configured and aligned in the film transport direction. They are parallel to the surface of the filling tube 20 arranged. Instead of a longitudinal sealing jaw 30 can be used as a radiant heater 28 also a directed in the direction of transport direction, straight infrared radiation coil 31 be used ( 11 ). The infrared radiation coil 31 For the purpose of better radiation direction, it can be three-sided from one to the film tube 21 reflective, arched mirror 32 be surrounded.

As a closure device 29 Two pairs counteract each other, the welds 7 . 8th each between their lateral surfaces 33 pinching rolls 34 , The roles 34 are driven at a rotational speed, the withdrawal speed of the film tube 21 through the film hood 19 equivalent. The lateral surfaces 33 the roles 34 are with a polytetraethylene-containing layer 35 provided to adhere the molten foil plastic to the lateral surfaces 33 to prevent.

The film print 19 has two opposite revolving trigger belt 36 on, by 90 degrees compared to the spreader elements 27 offset on the filling tube.

The spreading elements 27 can also be used to produce a flat tubular bag analog 3 as a double spreading elements 37 ( 8th ) each with one between the Einzelspreizelemente 38 . 39 each double spreading element 37 engaging, as a folding wire 40 designed gusset producers 41 be designed. Hose bag analogous to 5 and 7 be by means of further objected Einzelspreizelemente 38 . 39 generated.

The operation of the tubular bag machine 14 takes place continuously. This is the slide 19 operated as continuously as the circulation of the jaws 23 around their axes 42 ( 10 ). It is the radiant power of radiant heaters 28 proportional to the rotational speed of the film take-off 19 so that the in the welds 7 . 8th introduced amount of heat is independent of the engine power.

To the radial tension of the film tube 21 To keep it approximately constant is the format of the filling tube 20 in the film transport direction of one of the forming shoulder 18 adapted format 43 from a rejuvenation 44 in a reduced format 45 tapered, the spreading elements 27 with the part of the filling tube 20 connected to the reduced format 45 and wherein the difference of Filling tube stages of different formats 43 . 45 the radial expansion of a spreading element 27 equivalent.

The asymmetrical form shoulder 18 has two differently long collar chest pieces 46 . 47 ( 9 ). The longer collar chest piece 47 is about the through the longitudinal axis 48 the shoulder sleeve 49 and the middle of the collar-neck part 50 walking median plane of the form shoulder 18 led out, ie the top 51 the longer collar chest part 47 has a larger radial distance to the longitudinal axis 48 , As a result, the juxtaposition of the longitudinal seam 2 reached forming film areas.

A tubular bag 101 with gussets 110 . 111 has a longitudinal seam 102 and perpendicular to the longitudinal seam 102 and parallel to each other, the tubular bag 101 head side and bottom side closing cross seams 103 . 104 ( 5 . 6 ). At both parallel to the longitudinal seam 102 running edges 105 . 106 a gusset 110 . 111 the tubular bag 101 are welds 107 . 108 provided, which one on the bottom-side seam 104 erected tubular bag 101 give extra stiffness to buckling. The longitudinal seam 102 runs in the middle between the edges 105 bzs. 106 the tubular bag 101 ,

In another embodiment ( 7 ) runs the longitudinal seam 102 in a marginal weld 107 , Here are the inner surfaces of the film along the edge 105 welded together. This one, manufactured on a vertical bagging machine, with a floor stand 109 configured tubular bag 101 has a minimal film requirement. At both gussets 110 . 111 each are two welds 107 . 108 intended. The amount of width of a weld 107 . 108 corresponds to a fraction of the width of a gusset 110 . 111 , For the purpose of further stiffening could be at the welds 107 . 108 In addition, a film strip of weldable plastic are welded in each case.

1

flat tubular bag

2

longitudinal seam

3

head side format

4

bottom cross seam

5, 6

edge

7, 8th

Weld

9

foil

10 11

gusset

12 13

film strips

14

Fill and seal machine

15

supply roll

16

idler pulley

17

sheet

18

forming shoulder

19

film take-off

20

filling pipe

21

film tube

22

Longitudinal welding device

23

jaw

24

Transverse welding device

25

cutting blade

26

sealing surface

27

spreader

28

radiant heater

29

closing

30

Longitudinal sealing jaw

31

infrared Wendel

32

mirror

33

lateral surface

34

role

35

layer

36

extraction belt

37

Doppelspreizelement

38 39

Einzelspreizelement

40

Faltdraht or cooling plate

41

Gusseted producer

42

axis

43

larger format

44

rejuvenation

45

smaller format

46 47

Collar chest piece

48

longitudinal axis

49

shoulder sleeve

50

Collar-part

51

top

101

tubular bag with gusset

102

longitudinal seam

103 104

cross seam

105 106

edge

107 108

Weld

109

stand-up

110 111

gusset

Claims (21)

Flow wrapper with a supply roll ( 15 ) and pulleys ( 16 ) for feeding a flat film web ( 17 ) to an asymmetrical shape shoulder ( 18 ), wherein the collar breast parts ( 46 . 47 ) of the form shoulder ( 18 ) are different in length and the longer collar chest part ( 47 ) over the longitudinal axis ( 48 ) of the shoulder sleeve ( 49 ) and the middle of the neck collar ( 50 ) walking median plane of the form shoulder ( 18 ), with a film take-off ( 19 ) for transporting the film web ( 17 ), a filling tube ( 20 ) for receiving the to a film tube ( 21 ) formed film web ( 17 ), a longitudinal welding device ( 22 ) for producing a longitudinal seam ( 2 ) on the film tube ( 21 ), with a transverse welding device ( 24 ) for producing transverse seams ( 3 . 4 ) and with a separating device for the separation of the film tube ( 21 ), characterized in that one parallel to the jaws ( 23 ), with the filling tube ( 20 ) connected, radially from the filling tube ( 20 ) pioneering flat expansion element ( 27 ) is provided, that the expansion element ( 27 ) in a plane with the sealing surfaces ( 26 ) of the closed jaws ( 23 ), and that in the direction of transport of the film, the expansion element ( 27 ) the welding device ( 22 ) is provided, which is directed against the deflected tube edge, wherein in the direction of transporting the expansion element ( 27 ) on a part of the filling tube ( 20 ), which is one opposite one of the forming shoulder ( 18 ), through the tip ( 51 ) of the longer collar breast part ( 47 ) specific format ( 43 ) a reduced format ( 45 ), and that the expansion element ( 27 ) in the withdrawal direction of the film web with a distance from the forming shoulder ( 18 ) on the part of the filling tube ( 20 ) with the reduced format ( 45 ) is provided. Tubular bag machine according to claim 1, characterized in that the longitudinal welding device ( 22 ) a radiant heater ( 28 ) and a closure device ( 29 ), wherein the closing device ( 29 ) in particular a role ( 34 ). Tubular bag machine according to claim 2, characterized in that two spreading elements ( 27 ) are provided, which in opposite directions from the filling tube ( 20 ), and that each expansion element ( 27 ) in the direction of transport a radiant heater ( 28 ) and a closure device ( 29 ) are subordinate. Tubular bag machine according to claim 2 or 3, characterized in that the radiant heater ( 28 ) at an acute angle to the surface of the filling tube ( 20 ), and that the clear distance between the radiant heater ( 28 ) and the filling tube ( 20 ) is reduced in the film transport direction. Tubular bag machine according to claim 2, 3 or 4, characterized in that as radiant heater ( 28 ) a aligned in the direction of transport direction longitudinal sealing jaw ( 30 ) is provided. Tubular bag machine according to claim 2, 3 or 4, characterized in that as radiant heater ( 28 ) aligned in the direction of transport direction, straight infrared radiation coil ( 31 ) is provided. Tubular bag machine according to claim 6, characterized in that the infrared radiation coil ( 31 ) on three sides of a on the film tube ( 21 ) reflecting domed mirrors ( 32 ) is surrounded. Tubular bag machine according to claim 2, characterized in that as closing device ( 29 ) a pair of opposite, the longitudinal seam ( 2 . 102 ) between their lateral surfaces ( 33 ) clamping rollers ( 34 ) is provided. Tubular bag machine according to claim 8, characterized in that the rollers ( 34 ) are driven at a rotational speed, the withdrawal speed of the film take-off ( 19 ) corresponds. Tubular bag machine according to claim 7 or 8, characterized in that the lateral surfaces ( 33 ) of the roles ( 34 ) a polytetrafluoroethylene-containing layer ( 35 ) exhibit. Tubular bag machine according to claim 1, characterized characterized in that as Longitudinal welding device a circulating around two rollers heat sealing strip is provided. Tubular bag machine according to claim 1, characterized in that the film take-off ( 19 ) two counter-rotating discharge belts ( 36 ), which at 90 ° relative to the expansion element ( 27 ) or the spreading elements ( 27 ) on the filling tube ( 20 ) are offset. Tubular bag machine according to claim 1 or 3, characterized in that the expansion element ( 27 ) as a double spreading element ( 37 ) with one between the individual spreading elements ( 38 . 39 ) of the double spreading element ( 37 ) engaging gusset generators ( 41 ) is configured. Tubular bag machine according to claim 13, characterized in that in a gusset ( 10 . 10a . 11 . 11a ) of the film tube ( 21 ) a cooling plate ( 40 ) is inserted, against which the welding device ( 29 ) acts. Tubular bag machine according to claim 14, characterized characterized in that heatsink a polytetrafluoroethylene containing outer layer. Tubular bag machine according to claim 14 or 15, characterized in that the cooling plate ( 40 ) of the gusset generators ( 41 ). Tubular bag machine according to claim 13, characterized in that additionally a the Doppelspreizelement ( 27 ) is provided in the film transport direction preceding side fold generator. Tubular bag machine according to claim 13, characterized in that the difference of the different formats ( 43 . 45 ) in about 2/3 of the radial extent of the Doppelspreizelementes ( 27 ) or 1.5 times the radial extent of one of the two double spreading elements ( 27 ) corresponds. Tubular bag machine according to claim 1 or 12, characterized in that the film take-off ( 19 ) is continuously driven. Tubular bag machine according to claim 1 or 3, characterized in that the difference of the different formats ( 43 . 45 ) In approximately half the radial extent of the expansion element or the radial expansions of the two expansion elements corresponds. Tubular bag machine according to claim 1, characterized in that the difference of the different formats ( 43 . 45 ) of the radial extent of a spreading element ( 27 ) corresponds.