EP3718715B1 - Longitudinal cutting with integrated conveyor roller - Google Patents
Longitudinal cutting with integrated conveyor roller Download PDFInfo
- Publication number
- EP3718715B1 EP3718715B1 EP20160666.2A EP20160666A EP3718715B1 EP 3718715 B1 EP3718715 B1 EP 3718715B1 EP 20160666 A EP20160666 A EP 20160666A EP 3718715 B1 EP3718715 B1 EP 3718715B1
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- EP
- European Patent Office
- Prior art keywords
- film
- cutting knife
- packaging film
- packaging
- conveying element
- Prior art date
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- 238000005520 cutting process Methods 0.000 title claims description 180
- 229920006280 packaging film Polymers 0.000 claims description 86
- 239000012785 packaging film Substances 0.000 claims description 86
- 238000004806 packaging method and process Methods 0.000 claims description 30
- 230000008878 coupling Effects 0.000 claims description 15
- 238000010168 coupling process Methods 0.000 claims description 15
- 238000005859 coupling reaction Methods 0.000 claims description 15
- 229920001296 polysiloxane Polymers 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 description 13
- 238000003856 thermoforming Methods 0.000 description 10
- 238000007789 sealing Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000005022 packaging material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
- B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
- B26D1/143—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a stationary axis
- B26D1/15—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a stationary axis with vertical cutting member
- B26D1/151—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter rotating about a stationary axis with vertical cutting member for thin material, e.g. for sheets, strips or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
- B65B61/04—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages
- B65B61/06—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting
- B65B61/08—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for severing webs, or for separating joined packages by cutting using rotary cutters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B2220/00—Specific aspects of the packaging operation
- B65B2220/06—Cutting webs along their longitudinal direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
- B65B9/02—Enclosing successive articles, or quantities of material between opposed webs
- B65B9/04—Enclosing successive articles, or quantities of material between opposed webs one or both webs being formed with pockets for the reception of the articles, or of the quantities of material
Definitions
- the present invention relates to a longitudinal cutting device according to claim 1 and a method according to independent claim 11.
- longitudinal cutting devices are used together with cross-cutting devices for separating manufactured packages.
- Longitudinal cutting devices are designed to cut the packaging film composite fed to them in the film transport direction in the longitudinal direction, i.e. H. along the film transport direction.
- Such a longitudinal cutting device reveals the DE 103 59 479 A1 .
- the longitudinal cutting device disclosed therein comprises a plurality of cutting knives arranged next to one another in the film transport direction, each of which cooperates with a counter-pressure roller in order to cut the packaging film conveyed in the film transport direction along the film transport direction.
- a scissor cut occurs on the respective cutting knives due to the interaction of the respective cutting knives with the respective counter-pressure rollers.
- the problem with this is that, particularly when cutting through soft films, ie packaging films with low strength or rigidity, the film material can build up immediately in front of the respective cutting blades.
- packaging films made of soft film material can distort due to the scissor cutting effect, which can lead to an unclean cut along the film transport direction.
- DE 84 14 263 U1 discloses a longitudinal cutting device with several crushing knives which, during a cutting process of a packaging film, press against counter-cutting disks rotatably mounted underneath the packaging film in order to cut through the packaging film
- DE 22 62 815 A1 discloses a thermoforming packaging machine with a forming station, a sealing station, a cross-cutting station and a longitudinal cutting station, which are arranged on a machine frame in this order in the production direction.
- the longitudinal cutting device has a roller and cutting disks that can be pressed resiliently against it, the roller being drivably connected by means of a packaging material transport device
- the JP S60-134 825 A discloses a cutting unit configured to create a perforation in the hinge area of a package.
- the cutting unit includes a knife roll with cutting knives that are attached between fixing disks.
- the knife roller can be pretensioned by spring force against a counter-pressure roller positioned underneath.
- the object of the invention is to provide a longitudinal cutting device by means of which packaging material can be cut particularly precisely. Furthermore, it is the object of the invention to provide a corresponding method.
- the object of the invention is achieved by means of a longitudinal cutting device according to claim 1 and by means of a method according to independent method claim 11.
- the invention relates to a longitudinal cutting device for a packaging film, comprising a plurality of cutting knives for cutting the packaging film fed to the cutting knives in a film transport direction, the plurality of cutting knives in the Film transport direction has a left cutting knife, a right cutting knife and at least one intermediate cutting knife.
- the longitudinal cutting device has at least one feed unit assigned to the intermediate cutting knife and designed to transport the packaging film, by means of which the packaging film can be conveyed directly at the location of a cutting process in the film transport direction.
- a comparable feed unit can optionally be formed on the other cutting blades of the longitudinal cutting device.
- an indentation set for the packaging film on the feed unit is upstream in the film transport direction within a film transport plane at a predetermined distance of 1 mm to approx. 50 mm, preferably 4 mm to 20 mm, and / or 5% to 15% of a diameter of the intermediate cutting knife positioned to a cutting edge of the intermediate cutting knife designed for the cutting process.
- the packaging film can thus be drawn in on the feed unit at a short distance directly in front of the cutting knife and can be transported further along it in such a way that it can be fed to the cutting edge of the intermediate cutting knife in a tensioned state, thereby creating a clean longitudinal cut.
- the invention provides that in order to convey the packaging film on the feed unit, a frictional coupling is established between a first conveying element mounted above the packaging film and a second conveying element mounted below the packaging film. Using the non-positive coupling between the first and second conveying elements, the packaging film can be clamped between them in such a way that it goes through the cutting process on the cutting knife in a taut state, whereby a clean cut can be reliably produced.
- a contact force aligned orthogonally to a feed plane by the non-positive coupling can be varied. This makes it possible, in particular, to set a feed force resulting from the contact pressure in the film transport direction for different types of packaging film.
- the first conveying element is disc-shaped and has at least one compressible rubber track on the circumference. This means that the packaging film material to be conveyed engages particularly well on the feed unit and can be reliably transported along the film transport direction.
- the first conveying element has at least one elastically deformable silicone wheel.
- a silicone wheel would also mean a silicone tire.
- the first conveying element can be positioned on the feed unit in such a way that it is pressed against the conveying element positioned below the packaging film in such a way that the silicone wheel provided on the first conveying element deforms in a predetermined manner when it rests on the second conveying element located underneath.
- the front part provided for the feeding of the packaging film on the feed unit can be adjusted within the film transport plane at a predetermined distance upstream of the cutting edge of the intermediate cutting knife in such a way that, as described above, the film is fed in before the packaging film is severed. This enables clean feeding and clean cutting of the packaging film on the intermediate cutting knife.
- the first conveying element has two spaced apart silicone wheels transversely to the film transport direction, between which the intermediate cutting knife is mounted coaxially. This enables the packaging film to be guided past the feed unit using the two silicone wheels directly to the side of the cutting knife, which means that the packaging film can be fed better to the intermediate cutting knife.
- the intermediate cutting blade is rotatably mounted and the first conveying element is rotatably mounted on a common first shaft. This allows the cutting speed of the cutting knife to be adjusted independently of rotation of the first conveying element. The cutting speed of the cutting knife can therefore be excellently adjusted with regard to the packaging film material fed to the cutting knife.
- the first shaft is mounted in a height-adjustable manner above the packaging film.
- the feed unit in particular a feed area formed thereon, can be easily adjusted with regard to the packaging film material used.
- the first conveying element is a counter-holder roller and the second conveying element is a drivable feed roller, which are rotatably mounted at the same peripheral speeds via the non-positive coupling.
- the counter-holder roller rolls on the feed roller driving it in such a way that the drawn-in packaging film is gripped along a contact zone in between, the retraction of which, i.e. H.
- the frontmost part in the film transport direction, upstream is positioned within the film transport plane at a predetermined distance, for example from 0.1 mm to 30 mm, from the cutting edge of the intermediate cutting knife designed for the cutting process.
- the cutting blade is mounted so that it can be driven, decoupled from the feed unit, at a variable speed, preferably at a variable speed between 200 and 1000 revolutions per minute. This allows a wide range of soft film materials to be cut cleanly.
- the first conveying element and the second conveying element together form a recess for the intermediate cutting knife.
- the first conveying element and the second conveying element can interact by means of their frictional coupling in such a way that a section of the packaging film fed to the cutting knife is fixed in tension for the cutting process in the recess formed between them.
- the cutting knife can therefore make a clean longitudinal cut in the film transport direction through the packaging film material that is tightly fed to it.
- the invention also relates to a packaging machine, preferably a deep-drawing packaging machine, with a longitudinal cutting device of the type described above and with a separate film transport device, for example in the form of clip chains guided laterally on the machine frame, which is designed to move the packaging film along a variety of lengths in accordance with a machine work cycle of the packaging machine To promote work stations of the packaging machine, wherein operation of the feed unit of the longitudinal cutting device is coupled to operation of the film transport device of the packaging machine.
- the feed unit used on the longitudinal cutting device according to the invention can be operated synchronously with the film transport device of the packaging machine.
- all cutting blades of the longitudinal cutting device are each equipped with a feed unit, as previously described in connection with the intermediate cutting blade. Nevertheless, it can be provided that the outermost cutting blades in the film transport direction, i.e. H. the left and right cutting knives, which are already positioned on a packaging machine next to the side clamp chains of the packaging machine that hold the film material taut, do not require a separate feed unit in order to make a clean cut through the packaging film material.
- the invention also relates to a method for cutting through a packaging film in the film transport direction by means of a longitudinal cutting device which has a left cutting knife, a right cutting knife and at least one intermediate cutting knife in the film transport direction.
- a feed unit of the longitudinal cutting device positioned on the intermediate cutting knife pulls in the packaging film for a cutting process and feeds the packaging film directly to the intermediate cutting knife of the longitudinal cutting device.
- thermoforming packaging machine 1 shows a thermoforming packaging machine 1.
- the thermoforming packaging machine 1 comprises, one behind the other, an unwinding unit 2 for a bottom film 3, a forming station 4 for forming packaging troughs 5, an insertion section 6, along which products 7 are inserted into the shaped packaging troughs 5, a sealing station 8 for Closing the packaging troughs 5 with a top film 9, a cutting station 10 for separating finished packaging 11 and a discharge belt 12 positioned at the exit of the thermoforming packaging machine 1 for transporting away finished packaging 11. All work stations of the thermoforming packaging machine 1 are in Fig. 1 attached to a machine frame 13.
- Fig. 2 shows sections of the thermoforming packaging machine 1 in a schematic top view Fig. 1 .
- a film transport device 14 is provided on the machine frame 13 of the thermoforming packaging machine 1 in the film transport direction F.
- the film transport device 14 comprises clip chains 15a, 15b on the left and right of the machine frame 13 in the film transport direction F for gripping and conveying the bottom film 3 up to the sealing station 8 and for gripping and transporting the composite of the bottom film 3 produced at the sealing station 8 with the one sealed thereon Top film 9.
- Fig. 2 The manufacturing process takes place on the thermoforming packaging machine 1 in multiple lanes.
- Fig. 2 shows that work is carried out along three tracks 16a, 16b, 16c.
- the cutting station 10 has a cross-cutting device 17 and a longitudinal cutting device 18 one behind the other in the film transport direction F.
- the cross-cutting device 17 is designed to consist of the packaging film 19 fed to the cross-cutting device 17 transversely to the film transport direction F from the bottom film 3 and the top film 9 sealed with it, between the packages 11 produced.
- the longitudinal cutting device 18 positioned behind the cross-cutting device 17 in the film transport direction F is designed to cut through the packaging film 19 in the film transport direction F, ie in the longitudinal direction of the manufacturing process, so that finished, isolated packages 11 are available following the cutting station 10.
- Fig. 3 shows the longitudinal cutting device 18 in an isolated perspective view.
- the longitudinal cutting device 18 comprises a plurality of cutting knives 20, which are mounted coaxially transversely to the film transport direction F for cutting through the packaging film 19.
- a left cutting knife 20a, a right cutting knife 20d and two intermediate cutting knives 20b, 20c are positioned coaxially on a first shaft 21 in the film transport direction F.
- a feed unit 22 is assigned directly to the respective cutting knives 20.
- the respective feed units 22 are designed to transport the packaging film 19 and are in particular stored in such a way that the packaging film 19 can be conveyed directly at the location of the respective cutting knife 20 in the film transport direction F.
- the side clamp chains 15a, 15b are mounted close to the left and right cutting blades 20a, 20d in the film transport direction F.
- Fig. 4 shows an enlarged section of the in Fig. 3 longitudinal cutting device 18 shown.
- the respective feed units 22 have an inlet 23 on which the packaging film 19 is drawn in before the cutting process, but immediately in front of the respective cutting knife 20. This ensures that the packaging film 19 drawn in by means of the feed units 22 passes through the respective cutting process in a tensioned manner in the area of the respective cutting knife 20, so that it can be cut cleanly in the film transport direction F.
- Fig. 4 shows that the feed units 22 each have a first conveyor element 24 mounted above the packaging film 19 (not shown) and a second conveyor element 25 mounted below the packaging film 19.
- the respective first conveying element 24 has two adjacent silicone wheels 36, between which the respective cutting knife 20 is mounted coaxially.
- the first wave 21 out Fig. 4 along which the cutting blades 20 and the first conveying elements 24 assigned to them are coaxially mounted, can be adjusted in height by means of an adjusting mechanism 26.
- the respective first conveying elements 24 of the feed units 22 can thereby rest pressed on the associated second conveying elements 25 positioned underneath in such a way that they clamp the packaging film 19 between them.
- a contact pressure K aligned orthogonally to a film transport plane E of the packaging film 19 can be varied in the area of the respective non-positive coupling 27.
- a conveying zone 28 for the packaging film 19 is formed in the respective intermediate area.
- the associated respective feed 23 is stored in the film transport direction F upstream within the film transport plane E in front of the cutting knife 20 in order to pull in the packaging film 19 at the feed unit 22 before the cutting knife 20 is immersed in the packaging film 19.
- the respective first conveying elements 24 Fig. 4 are designed as counter-holder rollers 29.
- the counter-holder rollers 29 are rotatably mounted coaxially on a first shaft 21 transversely to the film transport direction F.
- the respective second conveyor elements 25 form driven feed rollers 35 which are mounted in a rotationally fixed manner on the second shaft 30, with the non-positive coupling 27 allowing the first and second conveyor elements 24, 25 to be driven at the same peripheral speeds.
- the respective first conveying elements 24 are rotatably mounted on the first shaft 21, so that the feed units 22 are decoupled from the operation of the cutting blades 20. This makes it possible to drive the cutting blades 20 at a variable speed.
- Fig. 5 shows a schematic sectional view of the feed unit 22 on the intermediate cutting blade 20b.
- the first conveying element 24 and the second conveying element 25 together form a recess 31 for the intermediate cutting knife 20b.
- the cutting knife 20b projects into the second conveying element 25 of the feed unit 22 in order to cut through the packaging film 19.
- the view off Fig. 5 could just as well refer to the feed unit 22 of another cutting knife 20 of the longitudinal cutting device 18.
- Fig. 6 shows a schematic arrangement of the feed unit 22 transversely to the film transport direction F.
- Fig. 6 shows that a front part of the feed 23 on the feed unit 22 in the film transport direction F upstream, within the film transport plane E in a predetermined Distance 32 is positioned to a cutting edge 33 of the intermediate cutting knife 20b designed for the cutting process.
- the distance 32 can be varied by adjusting the contact pressure K of the first conveying element 24, which is made of deformable material at least in the contact area, on the second conveying element 25 positioned underneath. Adjusting the distance 32 on the feed 23 of the feed unit 22 enables the packaging film 19 to be drawn in in the film transport direction F upstream of the cutting edge 33 for the cutting process before the packaging film 19 is severed using the cutting knife 20b.
- the packaging film 19 can thus be fed cleanly to the cutting knife 20b.
- the principle according to the invention can be applied to each of the coaxially arranged cutting blades 20a, 20b, 20c, 20d.
- the feed unit 22 used in the invention is preferably used on the intermediate cutting blades 20b, 20c, ie not positioned completely outside, in order to cleanly feed the packaging film 19 to the cutting process in their area.
- the outer cutting blades i.e. the one inside Fig. 3
- Left and right cutting knives 20a, 20d shown can do without a feed unit 22 because the staple chains 15a, 15b of the deep-drawing packaging machine 1 already run past them in the film transport direction F, so that the packaging film can be fed tightly to the outer cutting knives anyway.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
- Advancing Webs (AREA)
Description
Die vorliegende Erfindung betrifft eine Längsschneideeinrichtung gemäß dem Anspruch 1 sowie ein Verfahren gemäß dem unabhängigen Anspruch 11.The present invention relates to a longitudinal cutting device according to
An bekannten Verpackungsmaschinen werden Längsschneideeinrichtungen zusammen mit Querschneideeinrichtungen zur Vereinzelung hergestellter Verpackungen eingesetzt. Längsschneideeinrichtungen sind dazu ausgebildet, den ihnen in Folientransportrichtung zugeführten Verpackungsfolienverbund in Längsrichtung, d. h. entlang der Folientransportrichtung, zu durchtrennen.On known packaging machines, longitudinal cutting devices are used together with cross-cutting devices for separating manufactured packages. Longitudinal cutting devices are designed to cut the packaging film composite fed to them in the film transport direction in the longitudinal direction, i.e. H. along the film transport direction.
Eine derartige Längsschneideeinrichtung offenbart die
Die
Aufgabe der Erfindung ist es, eine Längsschneideeinrichtung zur Verfügung zu stellen, mittels welcher Verpackungsmaterial besonders präzise durchtrennt werden kann. Weiterhin ist es die Aufgabe der Erfindung, ein dementsprechendes Verfahren zur Verfügung zu stellen.The object of the invention is to provide a longitudinal cutting device by means of which packaging material can be cut particularly precisely. Furthermore, it is the object of the invention to provide a corresponding method.
Die Aufgabe der Erfindung wird gelöst mittels einer Längsschneideeinrichtung gemäß dem Anspruch 1 sowie anhand eines Verfahrens gemäß dem unabhängigen Verfahrensanspruch 11.The object of the invention is achieved by means of a longitudinal cutting device according to
Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen angegeben.Advantageous developments of the invention are specified in the subclaims.
Die Erfindung bezieht sich auf eine Längsschneideeinrichtung für eine Verpackungsfolie, umfassend eine Vielzahl von Schneidmessern zum Durchtrennen der den Schneidmessern zugeführten Verpackungsfolie in einer Folientransportrichtung, wobei die Vielzahl von Schneidmessern in der Folientransportrichtung ein linkes Schneidmesser, ein rechtes Schneidmesser und mindestens ein zwischenliegendes Schneidmesser aufweist. Dadurch kann bei einem mehrspurigen Verpackungsprozess der der Längsschneideeinrichtung zugeführte Verpackungsfolienverbund, bestehend aus einer Unterfolie und einer Oberfolie, durch die jeweiligen Schneidmesser längs der Folientransportrichtung durchtrennt werden.The invention relates to a longitudinal cutting device for a packaging film, comprising a plurality of cutting knives for cutting the packaging film fed to the cutting knives in a film transport direction, the plurality of cutting knives in the Film transport direction has a left cutting knife, a right cutting knife and at least one intermediate cutting knife. As a result, in a multi-lane packaging process, the packaging film composite fed to the longitudinal cutting device, consisting of a bottom film and a top film, can be severed along the film transport direction by the respective cutting blades.
Erfindungsgemäß weist die Längsschneideeinrichtung mindestens eine dem zwischenliegenden Schneidmesser zugeordnete und zum Transportieren der Verpackungsfolie ausgebildete Vorschubeinheit auf, anhand welcher die Verpackungsfolie direkt am Ort eines Schneidvorganges in Folientransportrichtung förderbar ist. An den anderen Schneidmessern der Längsschneideeinrichtung kann optional jeweils eine vergleichbare Vorschubeinheit ausgebildet sein.According to the invention, the longitudinal cutting device has at least one feed unit assigned to the intermediate cutting knife and designed to transport the packaging film, by means of which the packaging film can be conveyed directly at the location of a cutting process in the film transport direction. A comparable feed unit can optionally be formed on the other cutting blades of the longitudinal cutting device.
Damit wird erreicht, dass insbesondere Verpackungsfolienmaterial geringer Festigkeit direkt am Ort der Schneidvorganges dem zwischenliegenden Schneidmesser straff zugeführt werden kann. Die Folie wird dadurch sauber durch den Schneidvorgang geführt, sodass ein Aufstauen der Verpackungsfolie vor dem Schneidmesser nicht vorkommt.This ensures that, in particular, packaging film material of low strength can be fed tightly to the intermediate cutting knife directly at the location of the cutting process. This means that the film is guided cleanly through the cutting process, so that the packaging film does not pile up in front of the cutting knife.
Erfindungsgemäss ist ein für die Verpackungsfolie eingestellter Einzug an der Vorschubeinheit in Folientransportrichtung stromaufwärts innerhalb einer Folientransportebene in einem vorbestimmten Abstand von 1 mm bis ca. 50 mm, vorzugsweise 4 mm bis 20 mm, und/oder 5% bis 15% eines Durchmessers des zwischenliegenden Schneidmessers zu einer für den Schneidvorgang ausgebildeten Schneidkante des zwischenliegenden Schneidmessers positioniert. Somit kann die Verpackungsfolie an der Vorschubeinheit in kurzem Abstand unmittelbar vor dem Schneidmesser eingezogen werden und derart daran weitertransportiert werden, dass sie in einem gespannten Zustand der Schneidkante des zwischenliegenden Schneidmessers zuführbar ist, wodurch ein sauberer Längsschnitt entsteht.According to the invention, an indentation set for the packaging film on the feed unit is upstream in the film transport direction within a film transport plane at a predetermined distance of 1 mm to approx. 50 mm, preferably 4 mm to 20 mm, and / or 5% to 15% of a diameter of the intermediate cutting knife positioned to a cutting edge of the intermediate cutting knife designed for the cutting process. The packaging film can thus be drawn in on the feed unit at a short distance directly in front of the cutting knife and can be transported further along it in such a way that it can be fed to the cutting edge of the intermediate cutting knife in a tensioned state, thereby creating a clean longitudinal cut.
Die Erfindung sieht vor, dass zum Fördern der Verpackungsfolie an der Vorschubeinheit eine kraftschlüssige Kopplung zwischen einem ersten, oberhalb der Verpackungsfolie gelagerten Förderelement und einem zweiten, unterhalb der Verpackungsfolie gelagerten Förderelement hergestellt ist. Anhand der kraftschlüssigen Kopplung zwischen dem ersten und dem zweiten Förderelement lässt sich dazwischen die Verpackungsfolie derart einklemmen, dass sie in einem straffen Zustand den Schneidvorgang am Schneidmesser durchläuft, wodurch ein sauberer Schnitt zuverlässig herstellbar ist.The invention provides that in order to convey the packaging film on the feed unit, a frictional coupling is established between a first conveying element mounted above the packaging film and a second conveying element mounted below the packaging film. Using the non-positive coupling between the first and second conveying elements, the packaging film can be clamped between them in such a way that it goes through the cutting process on the cutting knife in a taut state, whereby a clean cut can be reliably produced.
Vorteilhaft ist es, wenn eine durch die kraftschlüssige Kopplung orthogonal zu einer Vorschubebene ausgerichtete Anpresskraft variierbar ist. Damit ist es insbesondere möglich, bei verschiedenen Verpackungsfolientypen eine aus der Anpresskraft resultierende Vorschubkraft in Folientransportrichtung einzustellen.It is advantageous if a contact force aligned orthogonally to a feed plane by the non-positive coupling can be varied. This makes it possible, in particular, to set a feed force resulting from the contact pressure in the film transport direction for different types of packaging film.
Vorzugsweise ist das erste Förderelement scheibenförmig ausgebildet und weist umfangsseitig mindestens eine komprimierbar ausgebildete Gummispur auf. Damit kommt das zu fördernde Verpackungsfolienmaterial an der Vorschubeinheit besonders gut in Eingriff und lässt sich zuverlässig entlang der Folientransportrichtung transportieren.Preferably, the first conveying element is disc-shaped and has at least one compressible rubber track on the circumference. This means that the packaging film material to be conveyed engages particularly well on the feed unit and can be reliably transported along the film transport direction.
Eine besonders vorteilhafte Variante sieht vor, dass das erste Förderelement mindestens ein elastisch verformbares Silikonrad aufweist. Unter einem Silikonrad wäre hier auch ein Silikonreifen zu verstehen. An der Vorschubeinheit kann während des Betriebs das erste Förderelement derart gegen das unterhalb der Verpackungsfolie positionierte Förderelement angepresst positioniert sein, dass sich das am ersten Förderelement vorgesehene Silikonrad in Anlage auf dem zweiten, darunter gelegenen Förderelement in einer vorbestimmten Weise verformt. Mittels dieser Verformung kann der für den Einzug der Verpackungsfolie vorgesehene vordere Teil an der Vorschubeinheit derart innerhalb der Folientransportebene in einem vorbestimmten Abstand stromaufwärts der Schneidkante des zwischenliegenden Schneidmessers eingestellt werden, dass, wie oben beschrieben, der Folieneinzug bereits vor dem Durchtrennen der Verpackungsfolie geschieht. Dies ermöglicht ein sauberes Zuführen sowie ein sauberes Durchtrennen der Verpackungsfolie am zwischenliegenden Schneidmesser.A particularly advantageous variant provides that the first conveying element has at least one elastically deformable silicone wheel. A silicone wheel would also mean a silicone tire. During operation, the first conveying element can be positioned on the feed unit in such a way that it is pressed against the conveying element positioned below the packaging film in such a way that the silicone wheel provided on the first conveying element deforms in a predetermined manner when it rests on the second conveying element located underneath. By means of this deformation, the front part provided for the feeding of the packaging film on the feed unit can be adjusted within the film transport plane at a predetermined distance upstream of the cutting edge of the intermediate cutting knife in such a way that, as described above, the film is fed in before the packaging film is severed. This enables clean feeding and clean cutting of the packaging film on the intermediate cutting knife.
Eine Variante sieht vor, dass das erste Förderelement quer zur Folientransportrichtung zwei zueinander beabstandete Silikonräder aufweist, zwischen welchen koaxial das zwischenliegende Schneidmesser gelagert ist. Dies ermöglicht, dass an der Vorschubeinheit mithilfe der beiden Silikonräder die Verpackungsfolie unmittelbar seitlich des Schneidmessers vorbeigeführt wird, wodurch sich die Verpackungsfolie am zwischenliegenden Schneidmesser besser zuführen lässt.One variant provides that the first conveying element has two spaced apart silicone wheels transversely to the film transport direction, between which the intermediate cutting knife is mounted coaxially. This enables the packaging film to be guided past the feed unit using the two silicone wheels directly to the side of the cutting knife, which means that the packaging film can be fed better to the intermediate cutting knife.
Von Vorteil ist es, wenn das zwischenliegende Schneidmesser drehfest und das erste Förderelement drehbar auf einer gemeinsamen ersten Welle gelagert sind. Damit lässt sich die Schnittgeschwindigkeit des Schneidmessers unabhängig von einer Rotation des ersten Förderelements einstellen. Somit lässt sich die Schnittgeschwindigkeit des Schneidmessers hinsichtlich des dem Schneidmesser zugeführten Verpackungsfolienmaterials hervorragend anpassen.It is advantageous if the intermediate cutting blade is rotatably mounted and the first conveying element is rotatably mounted on a common first shaft. This allows the cutting speed of the cutting knife to be adjusted independently of rotation of the first conveying element. The cutting speed of the cutting knife can therefore be excellently adjusted with regard to the packaging film material fed to the cutting knife.
Vorzugsweise ist die erste Welle höhenverstellbar oberhalb der Verpackungsfolie gelagert. Damit kann die Vorschubeinheit, insbesondere ein daran ausgebildeter Einzugsbereich, hinsichtlich des eingesetzten Verpackungsfolienmaterials einfach eingestellt werden.Preferably, the first shaft is mounted in a height-adjustable manner above the packaging film. This means that the feed unit, in particular a feed area formed thereon, can be easily adjusted with regard to the packaging film material used.
Gemäß der Erfindung sind das erste Förderelement eine Gegenhalterrolle und das zweite Förderelement eine antreibbare Vorschubrolle, die über die kraftschlüssige Kopplung verbunden mit gleichen Umfangsgeschwindigkeiten rotierbar gelagert sind. Anhand der kraftschlüssigen Kopplung rollt die Gegenhalterrolle derart auf der sie antreibenden Vorschubrolle ab, dass dazwischen die eingezogene Verpackungsfolie entlang einer Kontaktzone erfasst wird, deren Einzug, d. h. in Folientransportrichtung vorderster Teil, stromaufwärts, innerhalb der Folientransportebene in einem vorbestimmten Abstand, beispielsweise von 0,1 mm bis 30 mm zu der für den Schneidvorgang ausgebildeten Schneidkante des zwischenliegenden Schneidmessers positioniert ist.According to the invention, the first conveying element is a counter-holder roller and the second conveying element is a drivable feed roller, which are rotatably mounted at the same peripheral speeds via the non-positive coupling. Based on the non-positive coupling, the counter-holder roller rolls on the feed roller driving it in such a way that the drawn-in packaging film is gripped along a contact zone in between, the retraction of which, i.e. H. The frontmost part in the film transport direction, upstream, is positioned within the film transport plane at a predetermined distance, for example from 0.1 mm to 30 mm, from the cutting edge of the intermediate cutting knife designed for the cutting process.
Vorzugsweise ist das Schneidmesser von der Vorschubeinheit entkoppelt mit einer variierbaren Drehzahl, vorzugsweise mit einer variierbaren Drehzahl zwischen 200 bis 1000 Umdrehungen pro Minute, antreibbar gelagert. Damit lässt sich insbesondere ein breites Spektrum an Weichfolienmaterialien sauber durchtrennen.Preferably, the cutting blade is mounted so that it can be driven, decoupled from the feed unit, at a variable speed, preferably at a variable speed between 200 and 1000 revolutions per minute. This allows a wide range of soft film materials to be cut cleanly.
Vorzugsweise bilden das erste Förderelement und das zweite Förderelement zusammen eine Aussparung für das zwischenliegende Schneidmesser aus. Das erste Förderelement und das zweite Förderelement können mittels deren kraftschlüssiger Kopplung derart zusammenwirken, dass in der dazwischen ausgebildeten Aussparung ein zum Schneidmesser zugeführter Abschnitt der Verpackungsfolie gespannt für den Schneidvorgang fixiert ist. Somit kann das Schneidmesser einen sauberen Längsschnitt in der Folientransportrichtung durch das ihm straff zugeführte Verpackungsfolienmaterial durchführen.Preferably, the first conveying element and the second conveying element together form a recess for the intermediate cutting knife. The first conveying element and the second conveying element can interact by means of their frictional coupling in such a way that a section of the packaging film fed to the cutting knife is fixed in tension for the cutting process in the recess formed between them. The cutting knife can therefore make a clean longitudinal cut in the film transport direction through the packaging film material that is tightly fed to it.
Gegenstand der Erfindung ist auch eine Verpackungsmaschine, vorzugsweise eine Tiefziehverpackungsmaschine, mit einer Längsschneideeinrichtung der zuvor beschriebenen Art sowie mit einer gesonderten Folientransporteinrichtung, beispielsweise in Form seitlich am Maschinenrahmen geführter Klammerketten, die dazu ausgebildet ist, gemäß einem Maschinenarbeitstakt der Verpackungsmaschine die Verpackungsfolie entlang einer Vielzahl von Arbeitsstationen der Verpackungsmaschine zu fördern, wobei ein Betrieb der Vorschubeinheit der Längsschneideeinrichtung an einen Betrieb der Folientransporteinrichtung der Verpackungsmaschine gekoppelt ist. Damit kann die an der erfindungsgemäßen Längsschneideeinrichtung eingesetzte Vorschubeinheit synchron zur Folientransporteinrichtung der Verpackungsmaschine betrieben werden.The invention also relates to a packaging machine, preferably a deep-drawing packaging machine, with a longitudinal cutting device of the type described above and with a separate film transport device, for example in the form of clip chains guided laterally on the machine frame, which is designed to move the packaging film along a variety of lengths in accordance with a machine work cycle of the packaging machine To promote work stations of the packaging machine, wherein operation of the feed unit of the longitudinal cutting device is coupled to operation of the film transport device of the packaging machine. This means that the feed unit used on the longitudinal cutting device according to the invention can be operated synchronously with the film transport device of the packaging machine.
Vorzugsweise sind sämtliche Schneidmesser der Längsschneideeinrichtung jeweils mit einer Vorschubeinheit ausgestattet, wie sie zuvor in Zusammenhang mit dem zwischenliegenden Schneidmesser beschrieben wurde. Gleichwohl kann vorgesehen sein, dass die in Folientransportrichtung jeweiligen äußersten Schneidmesser, d. h. das linke und das rechte Schneidmesser, die ohnehin an einer Verpackungsmaschine neben den das Folienmaterial gespannt haltenden seitlichen Klammerketten der Verpackungsmaschine positioniert sind, ohne gesonderte Vorschubeinheit auskommen, um einen sauberen Schnitt durch das Verpackungsfolienmaterial durchzuführen.Preferably, all cutting blades of the longitudinal cutting device are each equipped with a feed unit, as previously described in connection with the intermediate cutting blade. Nevertheless, it can be provided that the outermost cutting blades in the film transport direction, i.e. H. the left and right cutting knives, which are already positioned on a packaging machine next to the side clamp chains of the packaging machine that hold the film material taut, do not require a separate feed unit in order to make a clean cut through the packaging film material.
Die Erfindung betrifft auch ein Verfahren zum Durchtrennen einer Verpackungsfolie in Folientransportrichtung mittels einer Längsschneideeinrichtung die in der Folientransportrichtung ein linkes Schneidmesser, ein rechtes Schneidmesser sowie mindestens ein zwischenliegendes Schneidmesser aufweist. Erfindungsgemäß zieht eine am zwischenliegenden Schneidmesser positionierte Vorschubeinheit der Längsschneideeinrichtung die Verpackungsfolie für einen Schneidvorgang ein und führt die Verpackungsfolie direkt dem zwischenliegenden Schneidmesser der Längsschneideeinrichtung zu. Anhand der erfindungsgemäß eingesetzten Vorschubeinheit wird direkt am Ort des zwischenliegenden Schneidmessers erreicht, dass die Verpackungsfolie einer am Schneidmesser ausgebildeten Schneidkante straff, ohne der Möglichkeit eines Aufstauens, zugeführt wird, sodass demzufolge das Schneidmesser das Verpackungsfolienmaterial in Folientransportrichtung sauber durchtrennt.The invention also relates to a method for cutting through a packaging film in the film transport direction by means of a longitudinal cutting device which has a left cutting knife, a right cutting knife and at least one intermediate cutting knife in the film transport direction. According to the invention, a feed unit of the longitudinal cutting device positioned on the intermediate cutting knife pulls in the packaging film for a cutting process and feeds the packaging film directly to the intermediate cutting knife of the longitudinal cutting device. Using the feed unit used according to the invention, it is achieved directly at the location of the intermediate cutting knife that the packaging film is fed tightly to a cutting edge formed on the cutting knife, without the possibility of accumulation, so that the cutting knife therefore cleanly cuts through the packaging film material in the film transport direction.
Erfindungsgemäss wird die Verpackungsfolie an einem Einzug der Vorschubeinheit eingezogen bevor die Verpackungsfolie einer innerhalb einer Folientransportebene unmittelbar in Folientransportrichtung nachgelagerten Schneidkante des zwischenliegenden Schneidmessers zugeführt wird. Somit findet der Einzug an der Vorschubeinheit bereits vor, d. h. in Folientransportrichtung stromaufwärts, dem Durchtrennen der Verpackungsfolie am zwischenliegenden Schneidmesser statt, wodurch ein Aufstauen des Verpackungsfolienmaterials am Schneidmesser vermieden werden kann. Folglich wird die Verpackungsfolie sauber durch den Schneidvorgang geführt und wird infolgedessen besonders sauber in Folientransportrichtung durchtrennt. Vorteilhafte Ausführungsbeispiele der Erfindung werden anhand der Figuren genauer erläutert. Es zeigen:
Figur 1- eine Tiefziehverpackungsmaschine mit einer Längsschneideeinrichtung zum Durchtrennen einer Verpackungsfolie in Folientransportrichtung;
Figur 2- eine schematische Draufsicht eines Ausschnitts der in
Fig. 1 gezeigten Tiefziehverpackungsmaschine; Figur 3- eine perspektivische Darstellung einer Längsschneideeinrichtung;
Figur 4- eine vergrößerte Perspektivdarstellung eines Teils der in
Fig. 3 gezeigten Längsschneideeinrichtung; Figur 5- eine schematische Schnittdarstellung im Bereich eines Schneidmessers der Längsschneideeinrichtung; und
- Figur 6
- eine schematische Darstellung einer an der Vorschubeinheit ausgebildeten kraftschlüssigen Kopplung.
- Figure 1
- a thermoforming packaging machine with a longitudinal cutting device for cutting through a packaging film in the film transport direction;
- Figure 2
- a schematic top view of a section of the in
Fig. 1 shown thermoforming packaging machine; - Figure 3
- a perspective view of a longitudinal cutting device;
- Figure 4
- an enlarged perspective view of part of the in
Fig. 3 longitudinal cutting device shown; - Figure 5
- a schematic sectional view in the area of a cutting knife of the longitudinal cutting device; and
- Figure 6
- a schematic representation of a non-positive coupling formed on the feed unit.
Gemäß
Ferner zeigt
Die erste Welle 21 aus
Die jeweiligen ersten Förderelemente 24 aus
Das erfindungsgemäße Prinzip lässt sich für jedes der koaxial angeordneten Schneidmesser 20a, 20b, 20c, 20d anwenden. Vorzugsweise wird die bei der Erfindung eingesetzte Vorschubeinheit 22 allerdings an den zwischenliegenden, d. h. nicht ganz außerhalb positionierten, Schneidmessern 20b, 20c eingesetzt, um in deren Bereich die Verpackungsfolie 19 sauber dem Schneidvorgang zuzuführen. Damit wäre es vorstellbar, dass die äußeren Schneidmesser, d. h. das in
Claims (11)
- A slitting device (18) for a packaging film (19) comprising a plurality of cutting knives (20) for severing the packaging film (19) fed to the cutting knives (20) in a film transport direction (F), the plurality of cutting knives (20) including a left cutting knife (20a), a right cutting knife (20d) and at least one intermediate cutting knife (20b, 20c) in the film transport direction (F), wherein the slitting device (18) includes at least one feed unit (22) assigned to the intermediate cutting knife (20b, 20c) and configured for transporting the packaging film (19) by means of which the packaging film (19) can be conveyed immediately at the location of a cutting operation in the film transport direction (F), whereinfor conveying the packaging film (19) at the feed unit (22), a non-positive coupling (27) is produced between a first conveying element (24) supported above the packaging film (19) and a second conveying element (25) supported below the packaging film (19), the first conveying element (24) being a counter roller (29) and the second conveying element (25) being a drivable feed roller (35), which are supported to be rotatable with equal circumferential speeds (v) via the non-positive coupling (27),whereinan infeed (23) set for the packaging film (19) is positioned on the feed unit (22) on the upstream side in the film transport direction (F) within a film transport plane (E) at a predetermined distance (32) between 1 mm and 50 mm or 5% to 15% of the diameter of the intermediate cutting knife (20b, 20c) from a cutting edge (33) of the intermediate cutting knife (20b, 20c) formed for the cutting operation.
- The slitting device according to claim 1, characterized in that a contact force oriented orthogonally to the film transport plane (E) by means of the non-positive coupling (27) can be varied.
- The slitting device according to any one of the preceding claims, characterized in that the first conveying element (24) is disc-shaped and includes at least one circumferential compressible rubber track (34).
- The slitting device according to any one of the preceding claims, characterized in that the first conveying element (24) includes at least one elastically deformable silicone wheel (S).
- The slitting device according to claim 4, characterized in that the first conveying element (24) includes two silicone wheels (S) transverse to the film transport direction (F) which are spaced from each other and between which the intermediate cutting knife (20b, 20c) is supported coaxially.
- The slitting device according to any one of the preceding claims, characterized in that on a common first shaft (21) the intermediate cutting knife (20b, 20c) is non-rotatably supported and the first conveying element (24) is rotatably supported.
- The slitting device (2) according to claim 6, characterized in that the first shaft (21) is supported above the packaging film (19) such that its height can be adjusted.
- The slitting device according to any one of the preceding claims, characterized in that the intermediate cutting knife (20b, 20c) is decoupled from the feed unit and supported to be driven with a variable rotational speed.
- The slitting device according to any one of the preceding claims, characterized in that the first conveying element (24) and the second conveying element (25) together form a gap (31) for the intermediate cutting knife (20b, 20c).
- A packaging machine, preferably in the form of a deep-drawing packaging machine (1), comprising a slitting device (18) according to any one of the preceding claims and a separate film transport device (14) adapted to convey the packaging film (19) along a plurality of work stations of the packaging machine following a machine cycle of the packaging machine, wherein an operation of the feed unit (22) of the slitting device (18) is coupled to an operation of the film transport device (14) of the packaging machine.
- Method for severing a packaging film (19) in a film transport direction (F) by means of a slitting device (18) which includes a left cutting knife (20a), a right cutting knife (20d) and at least one intermediate cutting knife (20b, 20c) in the film transport direction (F), wherein a feed unit (22) of the slitting device (18) positioned at the intermediate cutting knife (20b, 20c) draws in the packaging film (19) for a cutting operation and feeds the packaging film (19) directly to the intermediate cutting knife (20b, 20c) of the slitting device (18), whereinthe packaging film (19) is conveyed at the feed unit (22) by means of a non-positive coupling established between a first conveying element (24) supported above the packaging film (19) and a second conveying element (25) supported below the packaging film (19), the first conveying element (25) being a counter roller (29) and the second conveying element being a drivable feed roller (35), which rotate with equal circumferential speeds (v) via the non-positive coupling (27),whereinthe packaging film (19) is drawn in at an infeed (23) of the feed unit (22) before the packaging film (19) is fed to a cutting edge (33) of the intermediate cutting knife (20b, 20c) immediately downstream of the infeed (23) in the film transport direction (F) within a film transport plane (E).
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DE102019204477.8A DE102019204477A1 (en) | 2019-03-29 | 2019-03-29 | Longitudinal cutting with integrated conveyor roller |
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CN112454470A (en) * | 2020-10-30 | 2021-03-09 | 八亿橡胶有限责任公司 | Tread slitting machine |
CN112458741A (en) * | 2020-11-18 | 2021-03-09 | 浙江百联无纺科技有限责任公司 | Bundling and cutting device for non-woven fabric |
DE102021120316A1 (en) | 2021-05-04 | 2022-11-10 | Weber Maschinenbau Gmbh Breidenbach | Packaging machine with a device for cutting food packaging along a longitudinal direction |
CN114132585B (en) * | 2021-11-23 | 2023-03-17 | 山东鸿创医疗器械科技有限公司 | Efficient bag opening automation equipment |
WO2023110748A1 (en) * | 2021-12-14 | 2023-06-22 | Gea Food Solutions Germany Gmbh | Packaging machine having a material web strip cutter |
Citations (1)
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DE3841250A1 (en) * | 1988-12-07 | 1990-06-13 | Multivac Haggenmueller Kg | Packaging machine with a cutting device |
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FR2206237B1 (en) * | 1972-11-10 | 1977-07-22 | Multivac Haggenmueller Kg | |
JPS60134825A (en) * | 1983-12-13 | 1985-07-18 | 株式会社サミツト | Method and device for forming notched groove for opening andseparation in vessel for food |
DE8414263U1 (en) * | 1984-05-10 | 1985-09-05 | Adolf Illig Maschinenbau Gmbh & Co, 7100 Heilbronn | Slitter |
JPS6119595A (en) * | 1984-07-09 | 1986-01-28 | 富士ゼロックス株式会社 | Sheet cutter |
DE10359479A1 (en) * | 2003-12-17 | 2005-07-21 | Cfs Germany Gmbh | slitter |
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