EP0215269B1 - Device for the production of bags - Google Patents

Device for the production of bags Download PDF

Info

Publication number
EP0215269B1
EP0215269B1 EP86110779A EP86110779A EP0215269B1 EP 0215269 B1 EP0215269 B1 EP 0215269B1 EP 86110779 A EP86110779 A EP 86110779A EP 86110779 A EP86110779 A EP 86110779A EP 0215269 B1 EP0215269 B1 EP 0215269B1
Authority
EP
European Patent Office
Prior art keywords
welding
web
bar
bars
knife
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP86110779A
Other languages
German (de)
French (fr)
Other versions
EP0215269A1 (en
Inventor
Fritz Ing. Grad. Achelpohl
Helmut Simon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of EP0215269A1 publication Critical patent/EP0215269A1/en
Application granted granted Critical
Publication of EP0215269B1 publication Critical patent/EP0215269B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/003—Flexible containers made from webs starting from tubular webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
    • Y10T156/1313—Cutting element simultaneously bonds [e.g., cut seaming]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8822—Edge-to-edge of sheet or web [e.g., traveling cutter]

Definitions

  • the invention relates to a device for producing bags from a double-layer web of thermoplastic material with the web intermittently by a bag length between welding jaws, of which the upper one is provided with a lifting and lowering drive, feed rollers and one below the web and parallel to the lower welding bar next to this guided cutting knife, which is attached to an endless traction device running over rollers and in the cutting area of which the web can be pressed down by the upper welding bar.
  • the lower welding bar is also movably mounted and can be pressed down into the cutting plane against spring force by the upper one, which necessitates additional guide means for the lower welding bar.
  • the object of the invention is therefore to provide a device of the type specified in the introduction, in which the lower welding bar can also be held fixed to the frame without a collision of the web with the cutting knife being possible outside the welding cycles.
  • this object is achieved in that, for feeding the web, the preferred rollers arranged directly in front of the welding bars are provided in rows of rows of comb-like upper and lower guide rods or blow air tubes which pass through in annular grooves and which between them are the web between the opened welding bars in an area above the knife path Pass through the plane, that the lower welding bar is fixed to the frame and that continuously rotating knives pass through the plane of the web defined by the lower welding bar during the execution of the transverse weld seam and that the lower row of guide rods or blow air tubes are provided pivoting devices in the direction of the lower welding bar, which are operated simultaneously with the lowering of the upper welding bar.
  • the rows of guide rods or blow air tubes which serve to guide the web prevent the cross-guided knife from damaging the web outside the welding cycles, during which the welding bars are lifted apart.
  • the upper welding bar presses the web into the cutting plane, so that the cross-guided knife can cut through the web clamped between the welding bars.
  • a sharp-edged pulling off of the web over the lower row of guide rods or blow air tubes is avoided by pivoting it towards the lower welding bar during the welding cycle. This avoids damage to the web or grooves pressed into it.
  • the knife which is preferably attached to a toothed belt or a chain, is driven relative to the drive performing the welding cycles in such a way that the cutting knife is located outside the upper run of the traction means during the lowering of the upper welding bar, so that the cutting knife cannot engage the web, so as long as it is not stuck between the welding bars.
  • Clamping or second welding bars parallel to the welding bars can also be provided, between which the knife path runs, the lower clamping or second welding bar lying in the plane of the lower welding bar.
  • the cross-cut is carried out on a narrow path section which lies between two welding bars or between a welding bar and a pair of clamping bars.
  • the upper run of the traction means is supported on a convexly curved support or a convexly curved slide or roller track, so that the knife executes a transverse movement relative to the plane of the track.
  • a lever For intermittent lifting and lowering of the upper welding and / or clamping bar, a lever can be provided from a rocker-like lever and pivoted by a cam or eccentric drive via a push rod and a coupling, the lower row of guide rods or blow air tubes via a coupling rod connected to the lever is pivotable.
  • Two side frames are connected to one another by two cross members 2 and 3 and by a fixed support 4.
  • a motor 6 is screwed on, which serves to drive the drive disk 7, which is firmly wedged on the shaft 8, which in turn is rotatably mounted in the cross member 3 at its end removed from the motor 6 .
  • a further shaft 9 is rotatably mounted above the shaft 8 both in the cross member 2 and in the fixed support 4.
  • a pulley 10 is supported on this shaft 9, which, together with the drive pulley 7, is wrapped by a toothed belt 11.
  • the shaft 9 protrudes with its end facing away from the cross member 2 from the fixed support 4, a deflection disk 12 being firmly connected to the projecting end.
  • the fixed carrier 4 has a further shaft, not shown, which carries a further deflection disk 13. Both deflection sheaves ben 12 and 13 are wrapped in a carrier tape 14 (see FIG. 2), the upper run of the carrier tape 14 being supported by a curved bar 15. In a manner not shown, this curved beam 15 is screwed to the fixed support 4.
  • the curved bar 15 has the effect that the separating knife 16, which is firmly connected to the carrier tape 14, has an arcuate course in the region of the upper run of the tape 14, so that the knife edge does not constantly cut with one and the same point, which would result in high knife wear.
  • FIG. 1 It can be seen from FIG. 1 that 16 counter jaws 17 and 18 are provided on both sides of the separating knife, the counter jaw 17 being held on the carrier 4 and the counter jaw 18 on the beam 15.
  • a movable welding jaw 19 and a movable clamping bar 20 interact with the two counter jaws 17 and 18.
  • Welding jaws 19 as well as clamping bars 20 are slidably placed on a pull rod 21 and are held by springs 22 and 23 in the rest position, i.e. in the raised position, pressed against the clamping ring 24 firmly connected to the pull rod 21.
  • the pull rod 21 itself is held by a machine-fixed guide 26 and is articulated to a rocker arm 27 via a bracket 25. This rocker arm is supported on a shaft 28 and can be cyclically raised by a cam 29 against the force of a tension spring 30.
  • an adjustable coupling 31 is articulated at one end, the other end of which engages a lever 32 which is freely rotatable on the axis 33 of the lower feed roller 34.
  • the lower feed roller 34 is provided with circumferential grooves, not shown, through which a blowing air rake protrudes, which is attached to the lever 32.
  • the upper feed roller 35 also has circumferential grooves, not shown, through which an upper blowing air rake 36 projects.
  • the upper blowing air rake 36 is not movable and is held by the side frames.
  • the position of the machine shown in Fig. 1 shows the position in which a section is being cut from an endless web, i.e.
  • the pull rod 21 is lowered, the clamping jaw 20 presses the film against the separating jaw 18, the welding bar 19 presses against the counter jaw 17 and welds the two layers of a film tube. It can be seen from FIG. 1 that the rotating cutting knife 16 cuts through the tubular web in this position.
  • the pull rod 21 is pressed upward by the cam plate 29, so that the clamping ring 24 presses against the clamping bar 20 and lifts it together with the welding jaw 19 so far from the counter jaws 17 and 18 that the connection thereafter advanced film tube no longer comes into contact with the knife 16.
  • the adjustable coupling 31 is pulled downward, so that the lower rake 37 assumes the raised position shown with dashed lines, whereby the foil is raised for better guidance and guided over the rotating knife 16.
  • the pivoted lower rake 37 allows the film web to be pressed down into the knife area without the risk of the film being damaged by the front edge of the rake as seen in the transport direction.
  • the blown air rakes 36 and 37 are used in a known manner to discharge the advanced tubular film end into the opened welding station.

Landscapes

  • Making Paper Articles (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Herstellen von Beuteln aus einer doppellagigen Bahn aus thermoplastischem Material mit die Bahn intermittierend um jeweils eine Beutellänge zwischen Schweißbacken, von denen der obere mit einem diesen hebenden und absenkenden Antrieb versehen ist, vorschiebenden Vorzugswalzen und mit einem unterhalb der Bahn und parallel zu dem unteren Schweißbalken neben diesem geführten Trennmesser, das an einem endlosen über Rollen umlaufenden Zugmittel befestigt und in dessen Schneidbereich die Bahn durch den oberen Schweißbalken herabdrückbar ist.The invention relates to a device for producing bags from a double-layer web of thermoplastic material with the web intermittently by a bag length between welding jaws, of which the upper one is provided with a lifting and lowering drive, feed rollers and one below the web and parallel to the lower welding bar next to this guided cutting knife, which is attached to an endless traction device running over rollers and in the cutting area of which the web can be pressed down by the upper welding bar.

Bei einer aus der DE-AS 2 005 040 bekannten Vorrichtung dieser Art ist auch der untere Schweißbalken beweglich gelagert und durch den oberen gegen Federkraft in die Schneidebene herabdrückbar, was zusätzliche Führungsmittel für den unteren Schweißbalken erforderlich macht.In a device of this type known from DE-AS 2 005 040, the lower welding bar is also movably mounted and can be pressed down into the cutting plane against spring force by the upper one, which necessitates additional guide means for the lower welding bar.

Aufgabe der Erfindung ist es daher, eine Vorrichtung der eingangs angegebenen Art zu schaffen, bei der auch der untere Schweißbalken gestellfest gehalten werden kann, ohne daß außerhalb der Schweißtakte eine Kollision der Bahn mit dem Schneidmesser möglich ist.The object of the invention is therefore to provide a device of the type specified in the introduction, in which the lower welding bar can also be held fixed to the frame without a collision of the web with the cutting knife being possible outside the welding cycles.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß zur Zuführung der Bahn die unmittelbar vor den Schweißbalken angeordneten Vorzugswalzen in Ringnuten durchsetzende Reihen von kammartig angeordneten oberen und unteren Führungsstäben oder Blasluftröhrchen vorgesehen sind, die zwischen sich die Bahn zwischen die geöffneten Schweißbalken in einer oberhalb der Messerbahn liegenden Ebene hindurchführen, daß der untere Schweißbalken gestellfest angeordnet ist und daß ständig umlaufende Messer die durch den unteren Schweißbalken bestimmte Ebene der Bahn während des Ausführens der Querschweißnaht durchsetzt und daß die untere Reihe der Führungsstäbe oder Blasluftröhrchen in Richtung auf den unteren Schweißbalken verschwenkende Einrichtungen vorgesehen sind, die gleichzeitig mit dem Absenken des oberen Schweißbalkens betätigt werden.According to the invention, this object is achieved in that, for feeding the web, the preferred rollers arranged directly in front of the welding bars are provided in rows of rows of comb-like upper and lower guide rods or blow air tubes which pass through in annular grooves and which between them are the web between the opened welding bars in an area above the knife path Pass through the plane, that the lower welding bar is fixed to the frame and that continuously rotating knives pass through the plane of the web defined by the lower welding bar during the execution of the transverse weld seam and that the lower row of guide rods or blow air tubes are provided pivoting devices in the direction of the lower welding bar, which are operated simultaneously with the lowering of the upper welding bar.

Bei der erfindungsgemäßen Vorrichtung verhindern die der Führung der Bahn dienenden Reihen von Führungsstäben oder Blasluftröhrchen, daß das quergeführte Messer die Bahn außerhalb der Schweißtakte beschädigen kann, während der die Schweißbalken voneinander abgehoben sind. Während des Schweißtaktes drückt der obere Schweißbalken die Bahn in die Schnittebene, so daß das quergeführte Messer die zwischen den Schweißbalken festgeklemmte Bahn quer durchtrennen kann. Ein scharfkantiges Abziehen der Bahn über die untere Reihe der Führungsstäbe oder Blasluftröhrchen ist dadurch vermieden, daß diese in Richtung auf den unteren Schweißbalken während des Schweißtaktes verschwenkt wird. Dadurch sind Beschädigungen der Bahn oder in diese eingedrückte Riefen vermieden.In the device according to the invention, the rows of guide rods or blow air tubes which serve to guide the web prevent the cross-guided knife from damaging the web outside the welding cycles, during which the welding bars are lifted apart. During the welding cycle, the upper welding bar presses the web into the cutting plane, so that the cross-guided knife can cut through the web clamped between the welding bars. A sharp-edged pulling off of the web over the lower row of guide rods or blow air tubes is avoided by pivoting it towards the lower welding bar during the welding cycle. This avoids damage to the web or grooves pressed into it.

Das vorzugsweise an einem Zahnriemen oder einer Kette befestigte Messer ist derart relativ zu dem die Schweißtakte ausführenden Antrieb angetrieben, daß sich das Schneidmesser während des Absenkens des oberen Schweißbalkens außerhalb des Obertrums des Zugmittels befindet, so daß das Schneidmesser nicht an der Bahn angreifen kann, so lange es nicht zwischen den Schweißbalken festgeklemmt ist.The knife, which is preferably attached to a toothed belt or a chain, is driven relative to the drive performing the welding cycles in such a way that the cutting knife is located outside the upper run of the traction means during the lowering of the upper welding bar, so that the cutting knife cannot engage the web, so as long as it is not stuck between the welding bars.

Es können auch zu den Schweißbalken parallele Klemm- oder zweite Schweißbalken vorgesehen werden, zwischen denen die Messerbahn verläuft, wobei der untere Klemm- oder zweite Schweißbalken in der Ebene des unteren Schweißbalkens liegt. Bei dieser Ausführungsform wird der Quertrennschnitt an einem schmalen Bahnabschnitt durchgeführt, der zwischen jeweils zwei Schweißbalken oder zwischen einem Schweißbalken- und einem Klemmbalkenpaar liegt.Clamping or second welding bars parallel to the welding bars can also be provided, between which the knife path runs, the lower clamping or second welding bar lying in the plane of the lower welding bar. In this embodiment, the cross-cut is carried out on a narrow path section which lies between two welding bars or between a welding bar and a pair of clamping bars.

Nach einer besonderen erfinderischen Ausgestaltung, für die für sich allein Schutz beansprucht wird, ist vorgesehen, daß das Obertrum des Zugmittels auf einem konvex gekrümmten Träger oder einer konvex gekrümmten Gleit- oder Röllchenbahn abgestützt ist, so daß das Messer relativ zur Bahnebene eine Querbewegung ausführt.According to a special inventive embodiment, for which protection is claimed by itself, it is provided that the upper run of the traction means is supported on a convexly curved support or a convexly curved slide or roller track, so that the knife executes a transverse movement relative to the plane of the track.

Zum taktweisen Heben und Senken des oder der oberen Schweiß- und/oder Klemmbalken kann ein von einem wippenartig gelagerten und durch einen Nocken- oder Exzenterantrieb verschwenkten Hebel über eine Schubstange und eine Koppel abgeleiteter Antrieb vorgesehen sein, wobei die untere Reihe der Führungsstäbe oder Blasluftröhrchen über eine mit dem Hebel verbundene Koppelstange verschwenkbar ist.For intermittent lifting and lowering of the upper welding and / or clamping bar, a lever can be provided from a rocker-like lever and pivoted by a cam or eccentric drive via a push rod and a coupling, the lower row of guide rods or blow air tubes via a coupling rod connected to the lever is pivotable.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher erläutert. In dieser zeigt

  • Fig. 1 die Beutelherstellungsmaschine in Seitenansicht,
  • Fig. 2 die Antriebsmittel und Führungsbahn des Querschneidmessers in vergrößerter Seitenansicht und
  • Fig. 3 die Beutelmaschine nach Fig. 1 in Draufsicht.
An embodiment of the invention is explained below with reference to the drawing. In this shows
  • 1 is a side view of the bag making machine,
  • Fig. 2 shows the drive means and guideway of the cross-cutting knife in an enlarged side view
  • Fig. 3 shows the bag machine according to Fig. 1 in plan view.

Zwei Seitengestelle, von denen nur das Seitengestell 1 dargestellt ist, sind durch zwei Traversen 2 und 3 sowie durch einen festen Träger 4 miteinander verbunden. Auf einer weiteren die beiden Seitengestelle miteinander verbindenden Traverse 5 ist ein Motor 6 aufgeschraubt, der zum Antrieb der Antriebsscheibe 7 dient, welche fest auf der Welle 8 aufgekeilt ist, die ihrerseits an ihrem von dem Motor 6 entgernten Ende drehbar in der Traverse 3 gelagert ist. Oberhalb der Welle 8 ist eine weitere Welle 9 sowohl in der Traverse 2 wie auch im festen Träger 4 drehbar gelagert. Auf dieser Welle 9 lagert eine Riemenscheibe 10, die gemeinsam mit der Antriebsscheibe 7 von einem Zahnriemen 11 umschlungen ist. Die Welle 9 ragt mit ihrem der Traverse 2 abgewandten Ende aus dem festen Träger 4 vor, wobei mit dem vorstehenden Ende eine Umlenkscheibe 12 fest verbunden ist.Two side frames, of which only the side frame 1 is shown, are connected to one another by two cross members 2 and 3 and by a fixed support 4. On a further cross member 5 connecting the two side frames, a motor 6 is screwed on, which serves to drive the drive disk 7, which is firmly wedged on the shaft 8, which in turn is rotatably mounted in the cross member 3 at its end removed from the motor 6 . A further shaft 9 is rotatably mounted above the shaft 8 both in the cross member 2 and in the fixed support 4. A pulley 10 is supported on this shaft 9, which, together with the drive pulley 7, is wrapped by a toothed belt 11. The shaft 9 protrudes with its end facing away from the cross member 2 from the fixed support 4, a deflection disk 12 being firmly connected to the projecting end.

Im Abstand zur Welle 9 weist der feste Träger 4 eine weitere nicht dargestellte Welle auf, die eine weitere Umlenkscheibe 13 trägt. Beide Umlenkscheiben 12 und 13 werden von einem Trägerband 14 umschlungen (siehe Fig. 2), wobei das Obertrum des Trägerbandes 14 durch einen gewölbten Balken 15 unterstützt ist. Auf nicht dargestellte Weise ist dieser gewölbte Balken 15 mit dem festen Träger 4 verschraubt. Der gewölbte Balken 15 bewirkt, daß das mit dem Trägerband 14 fest verbundene Trennmesser 16 im Bereich des Obertrums des Bandes 14 einen bogenförmigen Verlauf hat, so daß die Messerschneide nicht ständig mit ein und derselben Stelle schneidet, was einen hohen Messerverschleiß zur Folge hätte.At a distance from the shaft 9, the fixed carrier 4 has a further shaft, not shown, which carries a further deflection disk 13. Both deflection sheaves ben 12 and 13 are wrapped in a carrier tape 14 (see FIG. 2), the upper run of the carrier tape 14 being supported by a curved bar 15. In a manner not shown, this curved beam 15 is screwed to the fixed support 4. The curved bar 15 has the effect that the separating knife 16, which is firmly connected to the carrier tape 14, has an arcuate course in the region of the upper run of the tape 14, so that the knife edge does not constantly cut with one and the same point, which would result in high knife wear.

Aus der Fig. 1 ist zu ersehen, daß beidseits des Trennmessers 16 Gegenbacken 17 und 18 vorgesehen sind, wobei die Gegenbacke 17 an dem Träger 4 und die Gegenbacke 18 am Balken 15 gehalten sind. Mit den beiden Gegenbacken 17 und 18 wirken eine bewegliche Schweißbacke 19 und ein beweglicher Klemmbalken 20 zusammen. Schweißbacken 19 wie auch Klemmbalken 20 sind gleitend auf eine Zugstange 21 aufgesetzt und werden von Federn 22 und 23 in Ruhestellung, d.h. in angehobener Stellung, gegen den mit der Zugstange 21 fest verbundenen Klemmring 24 gedrückt. Die Zugstange 21 selbst wird von einer maschinenfesten Führung 26 gehalten und ist über eine Lasche 25 gelenkig an einen Kipphebel 27 angelenkt. Dieser Kipphebel lagert auf einer Welle 28 und kann taktweise von einer Kurvenscheibe 29 entgegen der Kraft einer Zugfeder 30 angehoben werden.It can be seen from FIG. 1 that 16 counter jaws 17 and 18 are provided on both sides of the separating knife, the counter jaw 17 being held on the carrier 4 and the counter jaw 18 on the beam 15. A movable welding jaw 19 and a movable clamping bar 20 interact with the two counter jaws 17 and 18. Welding jaws 19 as well as clamping bars 20 are slidably placed on a pull rod 21 and are held by springs 22 and 23 in the rest position, i.e. in the raised position, pressed against the clamping ring 24 firmly connected to the pull rod 21. The pull rod 21 itself is held by a machine-fixed guide 26 and is articulated to a rocker arm 27 via a bracket 25. This rocker arm is supported on a shaft 28 and can be cyclically raised by a cam 29 against the force of a tension spring 30.

An dem der Lasche 25 gegenüberliegenden Ende des Kipphebels 27 ist einendig eine einstellbare Koppel 31 angelenkt, deren anderes Ende an einem Hebel 32 angreift, der frei drehbar auf der Achse 33 der unteren Vorzugswalze 34 sitzt. Die untere Vorzugswalze 34 ist mit umlaufenden nicht dargestellten Nuten versehen, durch die ein Blasluftrechen ragt, der an dem Hebel 32 befestigt ist. Die obere Vorzugswalze 35 weist ebenfalls nicht dargestellte umlaufende Nuten auf, durch die ein oberer Blasluftrechen 36 ragt. Der obere Blasluftrechen 36 ist nicht beweglich und wird von den Seitengestellen gehalten. Die in der Fig. 1 dargestellte Lage der Maschine zeigt die Lage, in der gerade ein Abschnitt von einer Endlosbahn abgeschnitten wird, d.h. die Zugstange 21 ist abgesenkt, der Klemmbacken 20 drückt die Folie gegen die Trennbacke 18, der Schweißbalken 19 drückt gegen die Gegenbacke 17 und verschweißt die beiden Lagen eines Folienschlauches. Dabei ist aus der Fig. 1 zu erkennen, daß das umlaufende Trennmesser 16 in dieser Lage die Schlauchbahn durchtrennt.At the end of the rocker arm 27 opposite the tab 25, an adjustable coupling 31 is articulated at one end, the other end of which engages a lever 32 which is freely rotatable on the axis 33 of the lower feed roller 34. The lower feed roller 34 is provided with circumferential grooves, not shown, through which a blowing air rake protrudes, which is attached to the lever 32. The upper feed roller 35 also has circumferential grooves, not shown, through which an upper blowing air rake 36 projects. The upper blowing air rake 36 is not movable and is held by the side frames. The position of the machine shown in Fig. 1 shows the position in which a section is being cut from an endless web, i.e. the pull rod 21 is lowered, the clamping jaw 20 presses the film against the separating jaw 18, the welding bar 19 presses against the counter jaw 17 and welds the two layers of a film tube. It can be seen from FIG. 1 that the rotating cutting knife 16 cuts through the tubular web in this position.

Nach dem Schweiß- und Trennvorgang wird die Zugstange 21 durch die Kurvenscheibe 29 nach oben gedrückt, so daß der Klemmring 24 gegen den Klemmbalken 20 drückt und diesen zusammen mit der Schweißbacke 19 so weit von den Gegenbacken 17 und 18 abhebt, daß die im Anschluß daran vorgeschobene Folienschlauchbahn nicht mehr mit dem Messer 16 in Berührung gerät. Gleichzeitig mit dem Anheben der Zugsange 21 wird die einstellbare Koppel 31 nach unten gezogen, so daß der untere Rechen 37 die mit gestrichelten Linien dargestellte angehobene Lage einnimmt, wodurch die Folie zwecks besserer Führung angehoben und über das umlaufende Messer 16 hinweggeführt wird.After the welding and cutting process, the pull rod 21 is pressed upward by the cam plate 29, so that the clamping ring 24 presses against the clamping bar 20 and lifts it together with the welding jaw 19 so far from the counter jaws 17 and 18 that the connection thereafter advanced film tube no longer comes into contact with the knife 16. Simultaneously with the lifting of the tension rod 21, the adjustable coupling 31 is pulled downward, so that the lower rake 37 assumes the raised position shown with dashed lines, whereby the foil is raised for better guidance and guided over the rotating knife 16.

Während durch das Anheben des unteren Rechens 37 die Folie geführt wird, erlaubt der abgeschwenkte untere Rechen 37 das Herunterdrücken der Folienbahn in den Messerbereich, ohne daß die Gefahr besteht, daß durch die in Transportrichtung gesehen vordere Kante des Rechens die Folie beschädigt wird. Die Blasluftrechen 36 und 37 dienen in bekannter Weise zum Austragen des vorgeschobenen Schlauchfolienendes in die geöffnete Schweißstation.While the film is guided by lifting the lower rake 37, the pivoted lower rake 37 allows the film web to be pressed down into the knife area without the risk of the film being damaged by the front edge of the rake as seen in the transport direction. The blown air rakes 36 and 37 are used in a known manner to discharge the advanced tubular film end into the opened welding station.

Claims (4)

1. An apparatus for making bags from a two-ply web of thermoplastic material comprising pinch rollers, which intermittently advance the web by respective bag lengths between welding bars, the upper one of which is provided with a drive for lifting and lowering that bar, also comprising a severing knife, which is disposed below the web beside the lower welding bar and is guided parallel to the latter and is secured to an endless tensile element, which revolves around rollers, wherein the upper welding bar is adapted to depress the web into the cutting range of said knife, characterized in that upper and lower guide rods or air-blasting tubes (36, 37) in a comblike arrangement are provided in rows which extend in annular grooves of the pinch rollers (34, 35) which immediately precede the welding bars (17, 19), which rods or tubes serve to feed the web and guide the web between them for a movement between the opened welding bars (17, 19) in a plane which is disposed above the path for the knife, the lower welding bar (17) is fixed to the mainframe, the continuously revolving knife (16) extends during the making of the transverse seam weld in that plane of the web which is defined by the lower welding bar (17), and means are provided which serve to pivotally move guide rods or air-blasting tubes (37) of the lower row towards the lower welding bar (17) and are actuated simultaneously with the lowering of the upper welding bar (19).
2. An apparatus according to claim 1, characterized in that clamping bars or second welding bars (18, 20) are provided, which are parallel to the welding bars (17, 19), the path for the knife extends between said clamping bars or second welding bars, and the lower clamping bar or second welding bar (18) extends in the plane of the first lower welding bar (17).
3. An apparatus particularly according to claim 1, characterized in that the upper course of the tensile element (14) is supported on a convexly curved carrier (15) or on a slideway or a roller bed so that the knife (16) performs a transverse movement relative to the plane of the web.
4. An apparatus according to any of claims 1 to 3, characterized in that a drive is provided for intermittently lifting and lowering the upper welding bar and/or upper clamping bar or bars (19, 20) and via a push rod (21) and a link (25) is operated from a rocker lever, which is pivotally movable by a cam or eccentric drive (29), and the guide rods or air-blasting tubes (37) of the lower row are pivotally movable by a coupling rod (31), which is connected to the lever (27).
EP86110779A 1985-09-03 1986-08-04 Device for the production of bags Expired EP0215269B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853531457 DE3531457A1 (en) 1985-09-03 1985-09-03 DEVICE FOR PRODUCING BAGS
DE3531457 1985-09-03

Publications (2)

Publication Number Publication Date
EP0215269A1 EP0215269A1 (en) 1987-03-25
EP0215269B1 true EP0215269B1 (en) 1989-01-11

Family

ID=6280043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86110779A Expired EP0215269B1 (en) 1985-09-03 1986-08-04 Device for the production of bags

Country Status (5)

Country Link
US (1) US4734088A (en)
EP (1) EP0215269B1 (en)
CA (1) CA1264421A (en)
DE (1) DE3531457A1 (en)
DK (1) DK160686C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2597401B1 (en) * 1986-04-18 1988-08-05 Lagain Georges INSTALLATION FOR MANUFACTURING AND STACKING BAGS, BAGS, ETC. IN THERMOPLASTIC MATTER
IT1213658B (en) * 1987-07-28 1989-12-29 Colin Luis WELDING, CUTTING, WITHDRAWAL AND STORAGE DEVICE IN MACHINES FOR THE MANUFACTURE OF PLASTIC BAGS
CN114714667B (en) * 2021-09-18 2024-07-26 颖态智能技术(上海)有限公司 Bag making equipment and pre-stretching belt device thereof

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL126949C (en) * 1967-04-14 1967-04-14
FR2031713A5 (en) * 1969-02-04 1970-11-20 Lagain Georges
JPS51744B1 (en) * 1970-04-30 1976-01-10
DE2556968C2 (en) * 1975-12-18 1985-04-18 Hans 5216 Niederkassel Lehmacher Machine for the production of bags, sacks or similar packaging from a thermoplastic plastic film web
US4230029A (en) * 1978-10-26 1980-10-28 Gloucester Engineering Co., Inc. Cutting assembly useful in bag machines
DE7925119U1 (en) * 1979-09-05 1981-03-12 Gartemann & Hollmann Gmbh, 4800 Bielefeld DEVICE FOR CUTTING PAPER FILMS
DE3100722C2 (en) * 1981-01-13 1983-09-01 Stiegler, Karl Heinz, 7000 Stuttgart Device for manufacturing plastic bags
US4613320A (en) * 1983-10-20 1986-09-23 Automated Packaging Systems, Inc. Container forming apparatus

Also Published As

Publication number Publication date
EP0215269A1 (en) 1987-03-25
DK419986D0 (en) 1986-09-02
DE3531457A1 (en) 1987-03-12
US4734088A (en) 1988-03-29
CA1264421A (en) 1990-01-16
DE3531457C2 (en) 1990-03-29
DK160686B (en) 1991-04-08
DK160686C (en) 1991-09-23
DK419986A (en) 1987-03-04

Similar Documents

Publication Publication Date Title
DE3153675C2 (en) Device for stacking bags made of thermoplastic material
DE69319730T2 (en) Device for adjusting drive units for films in a tubular film production machine
DE2402545C2 (en) Method and apparatus for the continuous production of bags or the like. made of thermoplastic plastic film
DE2825722C2 (en) Device for the production of bags or sacks and for their deposition in imbricated formation
DE69001279T2 (en) DEVICE FOR THE CONTINUOUS PRODUCTION OF NET BAGS.
DE3610551A1 (en) DEVICE FOR PRODUCING BENEFITS MADE FROM PLASTIC FILM LINES
DE2245198B2 (en) Bag making machine
DE2907849C2 (en) Packing machine
DE2238370A1 (en) INSTALLATION AND PROCEDURE FOR LEVELING A METAL STRIP
EP0111210B1 (en) Device for wrapping articles with a plastic sheet or the like
DE2651132A1 (en) STRIP DEVICE FOR BAG MANUFACTURING MACHINES
DE3340279C2 (en) Device for splicing the trailing end of a first plastic film to the leading end of a second plastic film
EP0182384B1 (en) Device for stacking flat objects, preferably bags made from a plastic web
DE3812604A1 (en) DEVICE FOR PRODUCING CONTAINERS
EP0215269B1 (en) Device for the production of bags
EP1201539A1 (en) Device for making and preferably filling and closing of thermoplastic bags
DE10204313A1 (en) Method and device for cutting label sleeves from a flat label tube tape
EP0506645B1 (en) Apparatus for fabrication of battery plate envelopes
DE102006005991B4 (en) Apparatus for cutting sheet-like material webs
DE2708853A1 (en) DEVICE FOR CUTTING AND SIMULTANEOUSLY BLOCKING A STACK OF FILM-SHAPED SECTIONS
EP0294582B1 (en) Device for producing thermoplastic bags or sacks from a tubular sheath supplied preferably with sidefolds
EP0014858B1 (en) Method and device for attaching tear strips or the like to a web of wrapping material
DE3546743C2 (en) Thermoplastics film bags mfr. machine
EP0266575B1 (en) Method and device for the breaking of partly cut and the subsequent stacking of flat objects, preferably double bags, made from plastic
EP0544078B1 (en) Device for cutting off tubular plastic sheets containing transverse welds from a continuous sheet, and stacking them

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE FR IT

17P Request for examination filed

Effective date: 19870609

17Q First examination report despatched

Effective date: 19880129

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE FR GB IT

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: BUGNION S.P.A.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19900725

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19910804

ITTA It: last paid annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19920724

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19920730

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19930831

BERE Be: lapsed

Owner name: WINDMOLLER & HOLSCHER

Effective date: 19930831

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19940429

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050804