Patent Grant
10011379
This application is a 371 of PCT/EP2013/055477 filed Mar. 15, 2013, which in turn claims the priority of DE 10 2012 102 812.5 filed Mar. 30, 2012, the priority of both applications is hereby claimed and both applications are incorporated herein by reference.
The invention relates to a method for reducing restoring forces of package sleeves in a filling machine, wherein each flat-folded package sleeve comprises four package walls separated from one another by parallel-running outer and inner fold edges and at the outer fold edges respectively one acute internal angle is enclosed between the package walls, comprising the process steps
Filling machines for filling products, in particular liquid foodstuffs, into packaging containers consisting of cardboard composite material are known from the prior art. For the structure of known filling machines, reference is made, for example, to EP 0 936 992 B1 and DE 41 42 167 C2.
On account of better transportability, the usually rectangular packaging containers are only produced in the filling machine from packaging blanks provided with fold edges and welded together to form package sleeves. Each flat-folded package sleeve has four package walls separated from one another by four parallel-running outer and inner fold edges. At the outer fold edges of the flat-folded package sleeve, an acute angle is enclosed in each case between the package walls. The inner fold edges of the flat-folded package sleeve are disposed between the outer fold edges. At the inner fold edges of the flat-folded package sleeve, an obtuse internal angle is enclosed in each case between the package walls. If the package walls have the same dimensions, the inner fold edges divide the section between the outer fold edges at the centre.
The flat-folded package sleeves from a magazine are supplied to the at least one conveyor line of the filling machine. In the magazine the package sleeves are disposed consecutively as stacks, usually upright. On a removal side of the magazine pointing in the direction of the conveyor line, two of the four package walls of the respectively front package sleeve are exposed. On its rear side the stack is acted upon by a force in the direction of the removal side, for example, that of a spring or a linear drive in order to displace the package sleeves of the stack towards the removal side.
A removal and unfolding apparatus comprises a gripper for gripping one of the two package walls exposed on the removal side of the magazine, a guide for the other one of the two exposed package walls and retaining elements disposed in the direction of movement after the guide for receiving the outer fold edges of the unfolded package sleeve.
The removal and unfolding apparatus unfolds the initially flat-folded package sleeve to form a package sleeve forming a rectangle in cross-section. The unfolded package sleeve is transferred by a transport device. Along the conveyor line of the filling machine, the packaging containers produced from the package sleeves are sterilised, filled and then closed. The package base is usually produced directly before filling. Then the package top is usually produced.
In particular, transport wheels or revolving conveyor belts having pocket-shaped receptacles for the unfolded package sleeves or packaging containers are used as the transport device. The stepwise rotating transport wheels have a plurality of radially outwardly extended parallel receptacles. The receptacles are usually configured as mandrels onto which the unfolded package sleeves or packaging containers are slid; we then talk of a mandrel wheel. In another embodiment of such a transport wheel, each receptacle has a plurality of arms or profiles which come to rest on the outer side, in particular directly adjacent to the fold edges of the unfolded package sleeve or the packaging container. In this case, the receptacles form cells into which the unfolded package sleeves or packaging containers can be inserted; we then talk of a cell wheel.
A filling machine with removal and unfolding apparatus pertaining to the prior art, made by SIG Combibloc GmbH, D-52441 Linnich is explained in detail hereinafter with reference to
The flat-folded package sleeves (1) are stored upright in the magazine (2) of the filling machine. Each flat-folded package sleeve (1) has four package walls (5a, 5b, 6a, 6b) separated from one another by parallel running outer fold edges (3a, 3b) and inner fold edges (4a, 4b).
A removal side (7) of the magazine (2) exposes the two forwardly pointing package walls (5a, 5b) of the respectively front package sleeve (1). In order that the package sleeves (1) do not fall out of the magazine on the removal side (7), retaining elements (8a, 8b) are disposed on the removal side (7), which elements extend along the outer fold edges (3a, 3b) of the front package sleeve (1). The respectively front package sleeve (1) is not removed in the full width of the two package walls (5a, 5b). On the contrary, the package sleeve (1) is merely gripped at one of the two exposed package walls (5a) of the package sleeve (1) on the removal side (7) of the magazine (2) (cf.
Since the package sleeves (1) have been stored or transported for a long time in the flat-folded state before introduction into the machine, the fold edges (3a, 3b, 4a, 4b) of the package sleeve (1) give rise to restoring forces which counteract the unfolding of the package sleeve (1). The restoring forces increase with the unfolding of the initially flat-folded package sleeve (1) to form a parallelogram in cross-section, in particular a package sleeve forming a rectangle.
In order to reduce the restoring forces, the package sleeves (1) are moved somewhat beyond the rectangular cross-section with the aid of the sucker at the end of the curved guide surface (12) so that the initially acute internal angle (15a, 15b) of the package sleeve is briefly slightly more than 90°, as can be seen from
The package sleeve (1) can thereby be overstretched in the unfolded fold edges (3a, 3b) so that after erecting, the package sleeve (1) adopts and retains the desired rectangular or square cross-section (
The overstretching of the fold edges is, however, only successful to a limited extent since the package sleeve must be overstretched a little more or a little less depending on the condition of the cardboard. However, as a result of the constant movement path (14) of the suction gripper (9), an individual overstretching is not possible. In addition, the additional movement of the suction gripper (9) for the overstretching takes time, thus lengthening the removal and unfolding cycle. This lengthening of the cycle reduces the working speed of the entire filling machine.
In order not to restrict the speed of the filling machine too severely despite the overstretching, the package sleeves are removed and unfolded at the highest possible speed. As a result, a large amount of noise is generated when the fold edges (3a, 3b) snap into the retaining elements (16, 17).
EP 0 978 453 A discloses a removal and unfolding apparatus for the removal of a flat-folded package sleeve from a magazine and for unfolding the removed package sleeve, which transfers the package sleeve, which is partially erected in cross-section to form a parallelogram, to a transport device comprising two revolving belts for transporting the upright package sleeve along a transport path. During the transfer to the transport device, the package sleeve is briefly overstretched by means of a folding means which is pivotably disposed on the removal and unfolding apparatus. The restoring forces are reduced by the overstretching.
EP 0 356 824 A1 discloses a method for unfolding a flat-folded package sleeve by means of an erecting apparatus in which the flat-folded package sleeves are introduced by means of a lifting conveyor between discharging rollers and conveyed obliquely upwards. With the aid of a pushing device and supports, the flat folded package sleeve is unfolded in the erecting apparatus, where the internal angles between the package walls at the outer fold edges are increased to approximately 180°. This results in a reduction in the restoring forces. The pushing device is then moved away from the side of the discharging rollers, where the pushing device adopts a central position so that the package sleeve relaxes to a square cross-section and retains this. An unloading conveyor device then pushes the package sleeve which has been erected to a square cross-section, onto a mandrel wheel.
EP 0339 116 A2 discloses a method for reducing restoring forces of package sleeves in a carton erecting apparatus, where the flat-folded package sleeves are removed individually from the magazine by means of a revolving conveyor with suction cups and are erected by means of guide elements to form a package sleeve forming a rectangle in cross-section. The conveyer transfers the upright package sleeve directly to means for reducing the restoring force which comprises two revolving upper conveyor belts and two revolving lower conveyor belts with projections disposed thereon. The two upper conveyor belts form a tapering shaft on the inlet side which has the effect that the internal angles between the package walls are increased to 180° at the outer fold edges whilst the package sleeve runs through the shaft. The package sleeve folded flat in such a manner then enters a station for re-erection of the flat-folded package sleeve. After re-erection of the flat-folded package sleeve, said sleeve is passed onto an unloading conveyor which conveys the upright package sleeve to a filling machine.
DE 933 918 B discloses an apparatus for reducing the restoring force of an upright package sleeve in a filling machine, in which the flat-folded package sleeve is removed from a magazine from below with the aid of a removal sword and erected to a package sleeve forming a rectangle in cross-section. In order to reduce the restoring force, a stress-relieving straight edge is applied to the surface of the upright package sleeve, which executes a swinging movement about the lower fold box edge. During the reduction of the restoring force, the removal sword holds the upright package sleeve firmly on a base and specifically until the package sleeve is completely folded flat by the stress-relieving straight edge. The package sleeve is then transported further with the aid of a conveying means.
U.S. Pat. No. 5,007,889 A discloses an apparatus for removing and unfolding a flat-folded package sleeve from a magazine, where the unfolding of the package sleeve is accomplished by means of an unfolding arm. During the removal of the package sleeve by means of suction grippers disposed on a pivoting arm, the restoring force of the package sleeve is simultaneously reduced, since the internal angle θ is temporarily increased to more than 90° by means of the unfolding arm.
An object of the invention to provide a method which enables a reduction in the restoring force adapted to the particular material of the package sleeve without increasing the cycle time for the removal and unfolding of the flat-folded package sleeve compared to the prior art. A filling machine for carrying out the method is furthermore to be proposed.
The solution of this object is based on the idea of decoupling the reduction of the restoring forces of the package sleeve from the removal and unfolding process. In detail, the object is solved by a method for reducing restoring forces of package sleeves in a filling machine, whereby the restoring force is reduced by temporarily increasing the internal angle between the package walls at the outer fold edges to more than 90° whilst the upright package sleeve is located on the transport path of the transport device. The reduction of the restoring force is accomplished with the aid of an apparatus for reducing the restoring force disposed on the transport device, which is independent of the removal and unfolding apparatus.
The invention uses free time windows on the transport path of the transport device located downstream of the removal and unfolding apparatus for reducing the restoring force. It is thereby possible to carry out an adapted overstretching with shorter cycle times for the unfolding and removal process. The shortened cycle times allow a higher working speed of the entire filling machine. The free time windows in the stepwise-driven downstream transport devices are formed by unused standstill positions and/or movement phases of the package sleeve along the transport path. The at least one processing step, in particular the formation of the package base, is carried out during one standstill interval at a processing station along the transport path. At standstill positions of the package sleeve, for example, between a transfer position of the transport device and the processing station, the standstill position has hitherto not been used. The movement phase between the transfer position and the processing station has also hitherto not been used to act on the package sleeve.
As a result of the adapted overstretching and reduction of the restoring force, the friction of the package sleeves during insertion and withdrawal from the receptacle of a transport wheel is reduced; it is also prevented that the completely upright package sleeve is twisted into itself.
A filling machine for carrying out the method according to the invention is characterised by an apparatus disposed on the transport device, independent of the removal and restoring force, for reducing the restoring force in the upright package sleeve by temporarily increasing the internal angle between the package walls at the outer fold edges to more than 90°. The removal and unfolding apparatus unfolds the initially flat-folded package sleeve to an upright package sleeve forming a parallelogram in cross-section. During the unfolding to an upright package sleeve the package sleeve acquires a rectangular cross-section at most. The removal and unfolding apparatus in particular brings about no reduction in the restoring force since the package sleeve is unfolded beyond the rectangular cross-section and as a result, the internal angle between the package walls at the outer fold edges is increased to more than 90°.
The downstream transport device is operated in a stepwise manner in order to allow a problem-free transfer of the upright package sleeve to the transport device and in order to execute the at least one processing step on the upright package sleeve such as in particular forming the base of the packaging container.
The standstill times produced during the stepwise operation of the transport device are preferably used not only to execute the at least one working step but also to reduce the restoring force. Alternatively, however, the restoring force can also be reduced during a movement of the upright package sleeve along the transport path.
A method for reducing the restoring force preferably used during the standstill of the stepwise-operated transport device consists in moving the outer fold edges towards one another in the direction of a cross-sectional diagonal between the outer fold edges of the upright package sleeve so that the internal angle between the package walls at the outer fold edges is increased to more than 90°. Over the movement length the requisite overstretching can be adapted to the magnitude of the material-dependent restoring forces.
A method for reducing the restoring force during a movement of the upright package sleeve along the transport path of a stepwise-operated transport device is characterised in that the internal angle between the package walls at the outer fold edges is increased to more than 90° by pivoting two opposite package walls parallel to one another in each case about one of the two outer fold edges. The magnitude of the reduction in the restoring force is adjusted by the size of the pivot angle of this parallel pivoting movement.
For the composite materials usually used to manufacture packaging containers, it has been found that the internal angle between the package walls at the outer fold edges is preferably increased to an angle in the range between 120° to 180° to reduce the restoring force. Such an increase was no longer acceptable in more modern filling machines in the interests of reasonable cycle times for the removal-unfolding process. According to the invention, as a result of the now available time window on the transport path of the downstream transport device, it is even possible to repeatedly increase the internal angle between the package walls at the outer fold edges temporarily to more than 90°, in particular to at least 120°.
As a result of its compact design and suitability for stepwise operation, the transport device located downstream of the removal and unfolding apparatus is configured as a transport wheel having a plurality of radially outwardly extending receptacles for respectively one package sleeve, each receptacle has a plurality of profiles which can be brought to rest against and/or adjacent to the fold edges of the package sleeve and the transport device has a drive for turning the transport wheel about an axis of rotation. Common transport wheels in filling machines have four receptacles uniformly distributed over the circumference of the axis of rotation. The drive of the transport wheel is configured as a stepping drive by which means the receptacles for the package sleeves can be brought into a standstill position after turning the transport wheel by a step angle, in particular of 90°. After transferring the upright package sleeve in a transfer position to the downstream transport wheel, the transport wheel turns further through the step angle so that another receptacle of the transport wheel turns into a position in alignment with the retaining elements of the removal and unfolding apparatus. Another package sleeve is inserted into this further receptacle immediately following the rotational movement. By turning the transport wheel, the receptacle previously loaded with a package sleeve comes into an, in particular horizontal, standstill position.
The apparatus for reducing the restoring force is either activated whilst the transport wheel is at a standstill or during the rotation of the transport wheel through the aforesaid step angle.
An apparatus for reducing the restoring force whilst the transport wheel is at a standstill can be integrated particularly favourably in the filling machine if each receptacle has at least one first profile that can be brought to rest against one of the two outer fold edges of the package sleeve and the receptacle has at least two second profiles which can be brought to rest against the other of the two outer fold edges of the package sleeve.
The restoring force of the upright package sleeve forming a rectangle in cross-section has the effect that the package sleeve is securely held in the receptacle having at least three profiles. If the receptacle has only a first profile, this is preferably designed as an angle profile that can be brought to rest against the fold edge. The two second profiles which can be brought to rest against the opposite outer fold edge are preferably designed as rods.
In a transport wheel configured with such first and second profiles, a push element which can be brought temporarily to abut against at least one of the two outer fold edges, which is adapted in such a manner that it can be moved in the direction of the cross-sectional diagonal running between the outer fold edges of the upright package sleeve is preferably provided as apparatus for reducing the restoring force whilst the transport wheel is at a standstill. The distance of the second profile from the outer fold edge is preferably determined so that the push element can be moved through the rods in the direction of the outer fold edge. Whilst the transport wheel is at a standstill, the fixedly mounted push element compresses the package sleeve along the cross-sectional diagonal whereby the internal angle between the package walls at the outer fold edges is increased to more than 90°. The travel length of the push element in the direction of the cross-sectional diagonal is thus determined until the restoring force is broken. The package sleeve is thereby supported on the first profile of the receptacle. After withdrawal of the push element, the package sleeve is re-erected to such an extent until it again comes to rest on the two second profiles.
In one embodiment of the invention the receptacle has a first and a second profile, each configured as an angle profile, which can be brought to rest against the outer fold edges. One of the two angle profiles has a section configured as a push element which can be moved temporarily in the direction of the cross-sectional diagonal running between the outer fold edges of the upright package sleeve.
An almost complete integration of the apparatus for reducing the restoring force in the transport wheel is achieved whereby each receptacle has two first holders where the two first holders receive one of the two outer fold edges and one of the two inner fold edges of the package sleeve, each receptacle has two second holders where the two second holders receive the other of the two outer fold edges and the other of the two inner fold edges of the package sleeve, that the two first holders are disposed in a fixed position on the transport wheel and the second holders are disposed pivotably on the transport wheel in such a manner that due to the pivoting movement of the two second holders, two opposite package walls are each pivotable parallel to one another about one of the two outer fold edges. As a result of the pivoting of the two second holders whilst the transport wheel is at a standstill or during turning of the transport wheel, the internal angle between the package walls at the outer fold edges is increased to more than 90° and the restoring force thereby broken.
A further advantage of a filling machine with pivotably arranged holders consists in that the transfer of the upright package sleeve to the downstream transport device can already take place when the flat-folded package sleeve is erected in cross-section to form a parallelogram whose cross-section is merely about ⅓ of the rectangular cross-section of the completely upright package sleeve. The package sleeve merely partially erected in such a manner is pushed into the receptacle of the transport wheel which as a result of the pivotably mounted second holders is able to securely receive the partially erected package sleeve. As a result, the complete erection of the flat-folded package sleeve can be partially shifted into the downstream transport device.
According to an embodiment of the invention, the two second holders of each receptacle are mechanically interconnected and form the coupler of a mechanical linkage that is disposed on the transport wheel. In the same way, the two first holders can be interconnected to form a single profile. The pivoting movement of the two second holders initially brings about the complete erection of the package sleeve until this has a rectangular or square cross-section. In the course of the further pivoting movement, the restoring force is reduced. The filling machine has an apparatus for pivoting the two second holders and therefore also for reducing the restoring force.
The apparatus comprises a cylinder cam mechanism comprising a cylindrical fixed cam body which is disposed coaxially to the axis of rotation of the transport wheel, a cylinder cam disposed in the cam body, a scanning element guided in the cylinder cam and a linkage which is connected on one side to the scanning element and on the other side to the second holders. The cylinder cam in the cam body is configured in such a manner that initially the second pair of holders erects the package sleeve to form a rectangle or square. The further course of the cylinder cam brings about a continuation of the pivoting movement, whereby the internal angle between the package walls at the outer fold edges is increased to more than 90°. Such a configuration of the cylinder cam has the effect that the apparatus for reducing the restoring force is active during turning of the transport wheel.
If the apparatus described previously for reducing the restoring force is to be activatable when the stepwise operable transport wheel is at a standstill, at least one section of the cylinder cam is disposed in a segment of the cam body displaceable in the direction of the axis of rotation. The scanning element reaches this section of the cylinder cam at the time when the package sleeve is erected to form a rectangle or square. The section of the cylinder cam is then displaced, for example, with a mechanically actuated tappet, from an initial position in the direction of the axis of rotation of the transport wheel whereby the pivoting movement of the second holders is continued despite the transport wheel being at a standstill. After pivoting of the second holder for the purpose of reducing the restoring force, the displaceably guided segment of the cam body is withdrawn into its initial position so that the section of the cylinder cam in the displaceable segment is again in alignment with the other cylinder cam disposed in the fixed cam body. In the subsequent course, the cylinder cam is configured to be annular so that the second holders are no longer moved by means of the linkage during the subsequent turning of the transport wheel by a step angle until they are pivoted during turning through the last step angle before reaching the transfer position of the transport wheel such that the merely partially upright package sleeve can be inserted into the receptacle.
The invention is explained in detail hereinafter with reference to the figures. In the figures:
Insofar as the filling machines according to the invention for filling liquid foodstuffs into packaging containers, shown in part in
The magazine (2) for receiving the flat-folded package sleeves (1) for producing the packaging containers is disposed on a frame (20) of the filling machine according to
The removal and unfolding apparatus furthermore has a flat guide surface (24) for the outer fold edge (3b) of the other of the two exposed package walls (5b) of the package sleeve (1). The flat guide surface (24) guides the outer fold edge (3b) in a sliding manner.
Located after the flat guide surface (24) in the direction of the movement path (23) is a fixed retaining element (17) for receiving the outer fold edge (3a). The retaining element (25) for receiving the diametrically opposite outer fold edge (3b) can be moved to and fro by means of a linear drive between an initial position shown in
As can be seen in particular from
In order to transfer the package sleeve (1) completely erected by the retaining elements (17, 25), forming a square in cross-section, to a transport device (26) of the filling machine located downstream of the removal and unfolding apparatus, the suction gripper (9) can be moved vertically up and down by means of an actuator (22).
The transport device (26) comprises a transport wheel (29) which is rotatable about an axis of rotation (28a) comprising four radially outwardly extending receptacles each having a first profile (30) and two second profiles (31). The first profile (30) is designed as an angular guide and can be brought to rest on the outer fold edge (3b). The two second profiles (31) are designed as rod profiles and can be brought to rest directly adjacent to the outer fold edge (3a). The first and second profiles (30, 31) form cells into which the unfolded package sleeves having rectangular cross-section can be inserted. The axis of rotation (28a) of the transport wheel (29) lies in a plane transverse to the conveyor line (23) of the filling machine. The transport wheel (29) is turned in a stepwise manner by 90° in each case about the axis of rotation (28a) by a drive not shown. From the transport wheel (29) shown, the unfolded package sleeves (1) are transferred to other transport devices not shown in the figures in order to perform further processing steps on the package sleeves.
An apparatus (32) for reducing the restoring force is disposed on the transport device. The apparatus (32) for reducing the restoring force comprises a push element (33) that is connected via an arm (34) to a movement drive (35). The push element (33) designed as an angle profile extends parallel to the outer fold edge (3a) at which it can be temporarily brought to rest, where the fold edges (3a) rest against the edge (36) formed between the legs of the angle profile on the inner side thereof. The movement drive (35) is fastened to the frame (20) of the filling machine.
The filling machine according to
After removing and unfolding the package sleeve (1), this is inserted into the downwardly pointing receptacle of the transport wheel (29). The transport wheel (29) is then turned in the anticlockwise direction (37) through a step angle of 90° with the aid of a drive not shown, so that the previously loaded receptacle comes into a horizontal, right-pointing standstill position. In this standstill position of the transport wheel (29), the movement drive (35) of the apparatus for reducing the restoring force is activated so that the push element (33) comes to rest on the outer fold edge (3a). In the course of the further movement of the push element (33), the package walls (5a, 6a) become detached from the rod-shaped second profiles (31) whilst the outer fold edges (3a, b) move towards one another in the direction of the cross-sectional diagonals (38). The internal angle (39) between the package walls (5a, 6a or 5b, 6b) at the outer fold edges (3a, b) is thereby increased to more than 90°, as can be seen clearly from
The filling machine shown in part in
The transport wheel (29) also has four receptacles, where each receptacle comprises a first radially outwardly extending profile (40) that is disposed in a fixed position on the transport wheel (29). The first profile (40) is angled at the side edges. The angled profile regions form first holders (41) for receiving the outer fold edge (3a) and the inner fold edge (4a) of the package sleeve (1). A second profile (42) also extends radially outwards and is also angled in the edge regions. The angled regions form second holders (43) for receiving the other outer fold edge (3b) and the other inner fold edge (4b) of the package sleeve (1). The second profile (42) is designed as a coupler of a mechanical linkage having four articulations, that converts a rectilinear movement of a linkage (44) into an oscillating movement of the second profile (42). The mechanical linkage has two motion links (45) which are articulated at one end to side arms (46) disposed in extension of the second profile (42) and which are articulated at the other end in an articulated manner on the axle body (28b) of the transport wheel (29). The motion links (45) move parallel to the side walls (6a, 5b) of the package sleeve (1).
The linkage (44) is designed in two parts. The linkage is divided into an angled part (44a) and a rectilinear part (44b). The angled part (44a) articulated to the underside of the second profile (42). At the opposite end the angled part (44a) is connected in an articulated manner to the rectilinear part (44b). The rectilinear part (44b) is connected to a scanning element (47) in the form of a cam roller at the end remote from the linkage. The rectilinear section (44b) is forcibly guided by a guide element (48) connected in a torque-proof manner to the axle body (28b) in the direction of the axis of rotation (28a) of the transport wheel (29). The scanning element (47) is part of a cylinder cam mechanism (49). The cylinder cam mechanism (49) comprises a cam body (50) disposed in a fixed position on the frame (20) coaxially to the axis of rotation (28a) of the transport wheel (29). A cylinder cam (51) in the form of a groove which guides the scanning element (47) is inserted in the cam body (50). A section (52) of the cylinder cam (51) is part of a segment (53) of the cam body (50) which is displaceable in the direction of the axis of rotation (28a). The segment (53) can be moved to and fro in a link (54) of the cam body (50) by means of an actuating member (55). The movement is accomplished with the aid of a drive not shown for the sake of clarity.
The method for reducing restoring forces in package sleeves (1) in a filling machine according to
Two further rotations of the transport wheel (29) through a step angle of 90° in each case now take place, where the package sleeve (1) which is completely upright and overstretched in its fold edges preserves its square cross-section. This is achieved by guiding the scanning element (47) during the subsequent two rotations through step angles of 90° in each case in an annular section (57) of the cylinder cam (51). As soon as the receptacle points horizontally to the right, the upright package sleeve is transferred with reduced restoring force to a following transport device not shown for the sake of clarity. During the subsequent rotation of the receptacle from this transfer position through 90° into this downward-pointing receiving position (
The filling machine according to the invention shown in part in
The essential difference between the filling machine according to
The complete erection of the package sleeve and the subsequent overstretching of the package edges (3a, b, 4a, b) is explained in detail hereinafter:
The transport wheel (29) is then rotated further through another step angle of 90°, whereby the scanning element (47) runs through an outwardly guided section (58) of the cylinder cam (51). The second profile (42) is thereby pivoted by means of the linkage (44) into the position shown in
In the position rotated further through a step angle of 90° in the clockwise direction (56), in which the receptacle points horizontally to the right, the processed package sleeve (1) can be transferred to a downstream transport device. The turning movement between the position with upwardly pointing receptacle into the position with horizontally right-pointing receptacle is accomplished without further pivoting of the second profile. To this end, the scanning element (47) is guided in an annular section (57) of the cylinder cam (51) which can be seen from
The previously described apparatus according to
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2012 102 812 | Mar 2012 | DE | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2013/055477 | 3/15/2013 | WO | 00 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2013/143892 | 10/3/2013 | WO | A |
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| Number | Date | Country | |
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| 20150068163 A1 | Mar 2015 | US |
