EP0059420B1 - Method and means for manufacturing stacks of bags - Google Patents

Method and means for manufacturing stacks of bags Download PDF

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Publication number
EP0059420B1
EP0059420B1 EP82101388A EP82101388A EP0059420B1 EP 0059420 B1 EP0059420 B1 EP 0059420B1 EP 82101388 A EP82101388 A EP 82101388A EP 82101388 A EP82101388 A EP 82101388A EP 0059420 B1 EP0059420 B1 EP 0059420B1
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EP
European Patent Office
Prior art keywords
sack
stack
transverse
sacks
tubular film
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
EP82101388A
Other languages
German (de)
French (fr)
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EP0059420A1 (en
Inventor
Fritz Achelpohl
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 EP0059420A1 publication Critical patent/EP0059420A1/en
Application granted granted Critical
Publication of EP0059420B1 publication Critical patent/EP0059420B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/66—Advancing articles in overlapping streams
    • B65H29/6609—Advancing articles in overlapping streams forming an overlapping stream
    • B65H29/6618—Advancing articles in overlapping streams forming an overlapping stream upon transfer from a first conveyor to a second conveyor advancing at slower speed
    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00—Pile receivers
    • B65H31/28—Bands, chains, or like moving receivers
    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/191—Bags, sachets and pouches or the like

Definitions

  • the invention relates to a method for producing stacks from bags according to the preamble of patent claim 1 and an apparatus for carrying out this method according to the preamble of patent claim 4.
  • the sacks are placed on a stacking belt which is inclined downward about a deflection roller in such a way that the end of the stack is fanned out with the bottom weld seams and the individual transverse weld seams are each offset by a small amount relative to each other. In many cases, however, this offset is not large enough to reliably prevent the floor weld seams from sticking or blocking together.
  • the object of the invention is therefore to provide a method according to the preamble of claim 1, according to which sacks or bags can be stacked up immediately after their production without fear of mutual sticking of the fresh weld seams to one another.
  • stacks can be produced in which the edge regions of the sacks provided with the transverse weld seams are offset one above the other in a scale-like manner, so that the weld seam regions cannot touch one another and cannot bond to one another.
  • the offset placement of the bags or sacks in the stack can be maintained if the finished stack is held and transported away in its front region behind the edge regions of the sacks, which are offset in a scale-like manner and provided with transverse weld seams.
  • the area lying in loops smoothes itself during transport or can be brushed out by rolling or the like.
  • the loop formed in the uppermost sack can be pulled deep enough in the finished stack that all the loops lie in one another and also touch one another in their apex region. This deep retraction of the loop of the top sack pulls the protruding front ends of the sacks into the stack.
  • the object of the invention is achieved in a device according to the preamble of claim 4 by the characterizing features of claim 4.
  • the gap is expediently formed by two rollers arranged parallel to one another.
  • the front roller in the feed direction can be formed by the rear deflection drum of a conveyor belt that conveys the stack.
  • the insertion element can consist of a rod, the ends of which are attached to the piston rods by piston-cylinder units arranged vertically to the side of the stack.
  • the lowering path of the rod is limited by cam disks with a spiral cam curve that are arranged laterally next to the stack and can be intermittently rotated by angular increments about a horizontal axis.
  • a rotation of the cam curve corresponds to a stack formation.
  • rollers 2, 3 are provided for the intermittent preference of the plastic tubular film web 1, which can also be provided with side gussets in the case of the production of gusseted bags or bags.
  • the rollers 2, 3 are provided with circumferential grooves, the bottom of which is indicated by the dashed line 4 and which engage in blown air tubes 5, 6 arranged in rows.
  • the tubular film web 1 is passed between the blown air tubes 5 and 6, so that the front end of the tubular web pulled by the preferred pair of rollers 2, 3 is stretched by the blown air stream between the opened welding jaws 7 and 8 and the upper and lower knives 9, 10 of the cutting tool is carried through a bag length after the front edge of the tubular film has been closed with a weld seam.
  • a hold-down device 11 and an abutment 12 assigned to the hold-down device are arranged downstream of the upper and lower knife 9, 10, the hold-down device 11 consisting of an angle iron which can be actuated by a piston-cylinder unit 13.
  • This angle iron is provided with recesses, not shown, so that the hold-down device passes through the rows of needles 14 of a needle bar 15 during its downward movement and thereby pushes the heavy-duty bags with their opening edge onto the needles 14.
  • the abutment 12 limits the path of the hold-down 11, which, as already mentioned, can be moved up and down by the pneumatic piston-cylinder unit 13.
  • both the abutment 12 and the needle bar 15 are lowered via a piston-cylinder unit 16.
  • the needle bar 15 is assigned two rollers which are provided at a distance one behind the other, of which the roller 1 simultaneously represents a roller of a conveyor belt 19.
  • a drawing rod 20 can be inserted, which is guided at both ends by a piston-cylinder unit.
  • the length of the drawing rod is dimensioned so that it exceeds the maximum sack width by so much that both the piston-cylinder-in units 21 as well as two cams 22 can attack at their ends.
  • the drawing rod 20 is moved from its upper position, not shown, in which it does not hinder the discharge of individual heavy goods bags, into the lower position shown in the figure, so that a loop is formed.
  • the cams rotate clockwise by a certain amount, so that the depth of the loops in the individual heavy-duty sacks becomes smaller as the stack increases. In this way it is achieved that the individual sacks or the bottom seams of the individual sacks lie in shingled relationship to one another and therefore cannot stick to one another.
  • the clamping jaw 23 is then lowered onto the stack by two piston-cylinder units 24 which engage it laterally, so that the latter is pressed onto the conveyor belt 19.
  • the piston-cylinder units 24 are fastened to racks 25 which are guided in rails in a manner not shown and can be displaced via pinions 26.
  • the pinions 26 are connected to the drive of the conveyor belt 19, so that the stack can be removed by the conveyor belt 19. In this case, a stack is obtained in which the weld seams are shingled next to each other.
  • the drawing rod 20 is moved all the way down after the application of the last sack of a stack to be formed.
  • the prerequisite for this is that the highest point of the cam disk 22 is turned out of the area of the drawing rod 20.
  • cam disc 22 rotates through 360 ° during the formation of a sack stack.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)

Description

Die Erfindung betrifft ein Verfahren zum Herstellen von Stapeln aus Säcken nach dem Oberbegriff des Patentanspruchs 1 sowie eine Vorrichtung zur Durchführung dieses Verfahrens nach dem Oberbegriff des Patentanspruchs 4.The invention relates to a method for producing stacks from bags according to the preamble of patent claim 1 and an apparatus for carrying out this method according to the preamble of patent claim 4.

Bei einem Verfahren und einer Vorrichtung dieser Art, die aus der BE-A-848 297 bekannt sind, erfolgt zum Vermeiden des Verblockens oder Verklebens der Bodenschweissnähte die Ablage der Säcke auf einem Stapelband, das um eine Umlenkrolle derart abwärts geneigt ist, dass das Stapelende mit den Bodenschweissnähten aufgefächert wird und die einzelnen Querschweissnähte relativ zueinander jeweils um ein kleines Stück versetzt sind. Dieser Versatz ist jedoch in vielen Fällen nicht gross genug, um mit Sicherheit ein Verkleben oder Verblocken der Bodenschweissnähte miteinander auszuschliessen.In a method and a device of this type, which are known from BE-A-848 297, in order to avoid blocking or sticking of the bottom weld seams, the sacks are placed on a stacking belt which is inclined downward about a deflection roller in such a way that the end of the stack is fanned out with the bottom weld seams and the individual transverse weld seams are each offset by a small amount relative to each other. In many cases, however, this offset is not large enough to reliably prevent the floor weld seams from sticking or blocking together.

Aufgabe der Erfindung ist es daher, ein Verfahren nach dem Oberbegriff des Patentanspruchs 1 zu schaffen, nach dem sich Säcke oder Beutel unmittelbar nach ihrer Herstellung zu Stapeln aufschichten lassen, ohne dass ein gegenseitiges Verkleben der frischen Schweissnähte miteinander zu befürchten ist.The object of the invention is therefore to provide a method according to the preamble of claim 1, according to which sacks or bags can be stacked up immediately after their production without fear of mutual sticking of the fresh weld seams to one another.

Erfindungsgemäss wird diese Aufgabe durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst.According to the invention, this object is achieved by the characterizing features of patent claim 1.

Nach dem erfindungsgemässen Verfahren lassen sich Stapel herstellen, bei denen die mit den Querschweissnähten versehenen Randbereiche der Säcke schuppenartig versetzt übereinander liegen, so dass die Schweissnahtbereiche einander nicht berühren und nicht miteinander verkleben können.According to the method according to the invention, stacks can be produced in which the edge regions of the sacks provided with the transverse weld seams are offset one above the other in a scale-like manner, so that the weld seam regions cannot touch one another and cannot bond to one another.

Die versetzte Ablage der Beutel oder Säcke in dem Stapel lässt sich aufrechterhalten, wenn der fertige Stapel in seinem vorderen Bereich hinter den schuppenartig versetzt übereinander liegenden und mit Querschweissnähten versehenen Randbereichen der Säcke festgehalten und abtransportiert wird. Der in Schlaufen liegende Bereich glättet sich beim Transport von selbst oder kann durch Walzen oder dergleichen herausgestrichen werden. The offset placement of the bags or sacks in the stack can be maintained if the finished stack is held and transported away in its front region behind the edge regions of the sacks, which are offset in a scale-like manner and provided with transverse weld seams. The area lying in loops smoothes itself during transport or can be brushed out by rolling or the like.

Sollen nach dem erfindungsgemässen Verfahren kantengerade Stapel gebildet werden, kann in dem fertigen Stapel die in dem obersten Sack gebildete Schlaufe so tief gezogen werden, dass alle Schlaufen ineinander und einander auch in ihrem Scheitelbereich berührend ineinander liegen. Durch dieses tiefe Einziehen der Schlaufe des obersten Sackes werden die einander überragenden vorderen Enden der Säcke in den Stapel eingezogen.If, according to the method according to the invention, straight-edged stacks are to be formed, the loop formed in the uppermost sack can be pulled deep enough in the finished stack that all the loops lie in one another and also touch one another in their apex region. This deep retraction of the loop of the top sack pulls the protruding front ends of the sacks into the stack.

Die erfindungsgemässe Aufgabe wird bei einer Vorrichtung nach dem Oberbegriff des Patentanspruches 4 durch die kennzeichnenden Merkmale des Patentanspruchs 4 gelöst.The object of the invention is achieved in a device according to the preamble of claim 4 by the characterizing features of claim 4.

Zweckmässigerweise ist der Spalt durch zwei zueinander parallel angeordnete Walzen gebildet. Die in Vorschubrichtung vordere Walze kann durch die hintere Umlenktrommel eines die Stapel abfördernden Förderbandes gebildet sein. Das Einschubelement kann aus einer Stange bestehen, deren Enden an den Kolbenstangen von seitlich neben dem Stapel senkrecht angeordneten Kolben-Zylinder- Einheiten befestigt sind.The gap is expediently formed by two rollers arranged parallel to one another. The front roller in the feed direction can be formed by the rear deflection drum of a conveyor belt that conveys the stack. The insertion element can consist of a rod, the ends of which are attached to the piston rods by piston-cylinder units arranged vertically to the side of the stack.

In weiterer Ausgestaltung der Erfindung ist vorgesehen, dass der Absenkweg der Stange von seitlich neben dem Stapel angeordneten, intermittierend um Winkelschritte um eine horizontale Achse drehbare Nockenscheiben mit spiraliger Nockenkurve begrenzt ist. Eine Drehung der Nokkenkurve entspricht einer Stapelbildung.In a further embodiment of the invention, it is provided that the lowering path of the rod is limited by cam disks with a spiral cam curve that are arranged laterally next to the stack and can be intermittently rotated by angular increments about a horizontal axis. A rotation of the cam curve corresponds to a stack formation.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung, in deren einziger Figur eine Seitenansicht der Vorrichtung zum Herstellen gestapelter Säcke dargestellt ist, näher erläutert.An embodiment of the invention is explained in more detail below with reference to the drawing, the single figure of which shows a side view of the device for producing stacked bags.

Zum intermittierenden Vorzug der Kunststoffschlauchfolienbahn 1, die im Falle der Herstellung von Seitenfaltensäcken oder -beuteln auch mit Seitenfalten versehen sein kann, ist ein Vorzugswalzenpaar 2, 3 vorgesehen. Die Walzen 2, 3 sind mit Umfangsnuten versehen, deren Grund durch die gestrichelte Linie 4 angedeutet ist und in die kammartig in Reihen angeordnete Blasluftrohre 5, 6 greifen. _For the intermittent preference of the plastic tubular film web 1, which can also be provided with side gussets in the case of the production of gusseted bags or bags, a pair of preferred rollers 2, 3 is provided. The rollers 2, 3 are provided with circumferential grooves, the bottom of which is indicated by the dashed line 4 and which engage in blown air tubes 5, 6 arranged in rows. _

Die Schlauchfolienbahn 1 ist zwischen den Blasluftrohren 5 und 6 hindurchgeführt, so dass das vordere Ende der von dem Vorzugswalzenpaar 2, 3 vorgezogenen Schlauchbahn von dem Blasluftstrom in gestreckter Form zwischen die geöffneten Schweissbacken 7 und 8 und dem Ober- und Untermesser 9, 10 des Schneidwerkzeugs um eine Sacklänge hindurchgetragen wird, nachdem der vordere Rand der Schlauchfolie mit einer Schweissnaht geschlossen worden ist. Dem Ober- und Untermesser 9, 10 sind ein Niederhalter 11 und ein dem Niederhalter zugeordnetes Widerlager 12 nachgeordnet, wobei der Niederhalter 11 aus einem Winkeleisen besteht, das von einer Kolben-Zylinder-Einheit 13 betätigt werden kann. Dieses Winkeleisen ist mit nicht dargestellten Ausnehmungen versehen, so dass der Niederhalter bei seiner Abwärtsbewegung die Reihen der Nadeln 14 einer Nadelleiste 15 durchsetzt und dadurch die Schwergutsäcke mit ihrer Öffnungskante auf die Nadeln 14 aufschiebt. Das Widerlager 12 begrenzt dabei den Weg des Niederhalters 11, der, wie schon erwähnt, durch die pneumatische Kolben-Zylinder-Einheit 13 herauf- und herunterbewegbar ist.The tubular film web 1 is passed between the blown air tubes 5 and 6, so that the front end of the tubular web pulled by the preferred pair of rollers 2, 3 is stretched by the blown air stream between the opened welding jaws 7 and 8 and the upper and lower knives 9, 10 of the cutting tool is carried through a bag length after the front edge of the tubular film has been closed with a weld seam. A hold-down device 11 and an abutment 12 assigned to the hold-down device are arranged downstream of the upper and lower knife 9, 10, the hold-down device 11 consisting of an angle iron which can be actuated by a piston-cylinder unit 13. This angle iron is provided with recesses, not shown, so that the hold-down device passes through the rows of needles 14 of a needle bar 15 during its downward movement and thereby pushes the heavy-duty bags with their opening edge onto the needles 14. The abutment 12 limits the path of the hold-down 11, which, as already mentioned, can be moved up and down by the pneumatic piston-cylinder unit 13.

Mit anwachsendem Schwergutsackstapel werden sowohl das Widerlager 12 auf nicht dargestellte Weise und die Nadelleiste 15 über eine Kolben-Zylinder-Einheit 16 abgesenkt. Wie die Figur erkennen lässt, sind der Nadelleiste 15 zwei mit Abstand hintereinander vorgesehene Rollen zugeordnet, von denen die Rolle 1 gleichzeitig eine Rolle eines Förderbandes 19 dargestellt. In den durch die Rollen 17 und 18 gebildeten Spalt ist ein Ziehstab 20 einfahrbar der beidendig von je einer Kolben-Zylinder-Einheit geführt wird. Die Länge des Ziehstabes ist dabei so bemessen, dass sie die maximale Sackbreite um so viel übersteigt, dass sowohl die beiden Kolben-Zylinder-Einheiten 21 wie auch zwei Kurvenscheiben 22 an ihren Enden angreifen können. Jeweils nach dem Austragen eines Schwergutsackes wird der Ziehstab 20 von seiner oberen, nicht dargestellten Lage, in der er den Austrag einzelner Schwergutsäkke nicht behindert, in die in der Figur dargestellte untere Lage gefahren, so dass eine Schlaufe gebildet wird. Nach jedem Hub verdrehen sich dabei die Kurvenscheiben im Uhrzeigersinn um ein bestimmtes Mass, so dass die Tiefe der Schlaufen in den einzelnen Schwergutsäcken mit anwachsendem Stapel kleiner wird. Auf diese Weise wird erreicht, dass die einzelnen Säcke bzw. die Bodennähte der einzelnen Säcke geschuppt zueinanderliegen und somit nicht miteinander verkleben können.As the stack of heavy goods bags increases, both the abutment 12 and the needle bar 15 are lowered via a piston-cylinder unit 16. As can be seen in the figure, the needle bar 15 is assigned two rollers which are provided at a distance one behind the other, of which the roller 1 simultaneously represents a roller of a conveyor belt 19. In the gap formed by the rollers 17 and 18, a drawing rod 20 can be inserted, which is guided at both ends by a piston-cylinder unit. The length of the drawing rod is dimensioned so that it exceeds the maximum sack width by so much that both the piston-cylinder-in units 21 as well as two cams 22 can attack at their ends. Each time a heavy goods bag is discharged, the drawing rod 20 is moved from its upper position, not shown, in which it does not hinder the discharge of individual heavy goods bags, into the lower position shown in the figure, so that a loop is formed. After each stroke, the cams rotate clockwise by a certain amount, so that the depth of the loops in the individual heavy-duty sacks becomes smaller as the stack increases. In this way it is achieved that the individual sacks or the bottom seams of the individual sacks lie in shingled relationship to one another and therefore cannot stick to one another.

Nach dem Bilden eines Stapels wird dann die Klemmbacke 23 durch zwei seitlich an ihr angreifende Kolben-Zylinder-Einheiten 24 auf den Stapel abgesenkt, so dass dieser auf das Förderband 19 gepresst wird. Die Kolben-Zylinder-Einheiten 24 sind an Zahnstangen 25 befestigt, die auf nicht dargestellte Weise in Schienen geführt und über Ritzel 26 verschiebbar sind. Die Ritzel 26 sind mit dem Antrieb des Förderbandes 19 verbunden, so dass der Stapel durch das Förderband 19 abgeführt werden kann. In diesem Fall erhält man einen Stapel, bei dem die Schweissnähte geschuppt nebeneinander liegen.After a stack has been formed, the clamping jaw 23 is then lowered onto the stack by two piston-cylinder units 24 which engage it laterally, so that the latter is pressed onto the conveyor belt 19. The piston-cylinder units 24 are fastened to racks 25 which are guided in rails in a manner not shown and can be displaced via pinions 26. The pinions 26 are connected to the drive of the conveyor belt 19, so that the stack can be removed by the conveyor belt 19. In this case, a stack is obtained in which the weld seams are shingled next to each other.

Will man statt dessen jedoch einen kantengeraden Stapel erreichen, wird der Ziehstab 20 nach dem Auftragen des letzten Sackes eines zu bildenden Stapels ganz nach unten gefahren. Voraussetzung dazu ist, dass der höchste Punkt der Kurvenscheibe 22 aus dem Bereich des Ziehstabes 20 herausgedreht ist.However, if instead one wants to reach a stack that is straight, the drawing rod 20 is moved all the way down after the application of the last sack of a stack to be formed. The prerequisite for this is that the highest point of the cam disk 22 is turned out of the area of the drawing rod 20.

Zu erwähnen wäre noch, dass sich die Kurvenscheibe 22 während der Bildung eines Sackstapels um 360° dreht.It should also be mentioned that the cam disc 22 rotates through 360 ° during the formation of a sack stack.

Claims (9)

1. A process of making stacks of sacks, each of which has at one end a bottom that is closed by a transverse seam weld, wherein the leading end of a tubular film (1), which consists of synthetic thermoplastics and is provided with a transverse seam weld at its end, is intermittently moved over the support (19), which carries the stack, and by a transverse cut at a distance corresponding to the sack length is severed from the tubular film (1), and the tubular film at its new end formed by the cut is closed by a transverse seam weld, and wherein the succeeding sacks also formed by transverse seam welds and transverse cuts are superimposed to form a stack of the desired height, the deposited sacks are retained at their superimposed open ends and at those ends where the bottoms are provided are shingled so that their transverse seam welds are offset from each other, characterized in that the deposited sacks are pulled successively, beginning with the first sack, in their intermediate portions to form loops which lie one in the other and have a depth which decreases from sack to sack.
2. A process according to claim 1, characterized in that the completed stack is retained in its leading portion behind those edge portions of the sacks, which are shingled and provided with transverse seam welds, and the sack is carried off.
3. A process according to claim 1, characterized in that in the completed stack the loop formed in the uppermost sack is pulled to such a depth that all loops lie one in the other and contact each other also adjacent to their apices.
4. Apparatus for carrying out the process according to claim 1, comprising a pair of pinch rollers (2, 3) for advancing the tubular film (1), means (5, 6) for carrying the end of the tubular film forward beyond the support or conveyor (19) which constitutes the stacking station, parallel means (7, 8, 9, 10) for the transverse cutting and transverse welding of the tubular film (1), the transverse welding device (7, 8) succeeding the transverse cutting device (9, 10) in the direction of movement of the tubular film (1), a device (14) for retaining at their open edges the sacks which are superimposed in the stack as it is formed, and a device (17, 18, 20, 21, 22) for offsetting those ends of said sacks which are provided with the transverse seam welds, characterized in that the stacking station has a transverse gap for forming ithe offsetting device, a push-in element (20) extending over each sack which has just been deposited is adapted to be inserted into said gap after the deposition of each sack, and said push-in element is provided with a control device (22), which after the deposition of each bag or sack reduces the depth of insertion of the push-in element by a distance which corresponds to one- half of the length by which the leading end of the bag or sack which has just been deposited protrudes from the underlying sack.
5. Apparatus according to claim 4, characterized in that the gap is defined by two parallel rolls (17,18).
6. Apparatus according to claim 5, characterized in that the roll which is the leading roll in the feeding direction is constituted by the rear reversing pulley (18) of a conveyor (19) for carrying off the stacks.
7. Apparatus according to any of claims 4 to 6, characterized in that the push-in element (20) consists of a rod, the ends of which are secured to the piston rods of vertical piston cylinder units (21), which are disposed beside the stack.
8. Apparatus according to any of claims 4 to 7, characterized in that the descent of the rod (20) is limited by camwheels (22), which are disposed beside the stack and intermittently rotatable about a horizontal axis through angular steps and provided with a spira! cam face.
9. Apparatus according to any of claims 4 to 8, characterized in that a pressure-applying ram (23) is provided ajdacent to the leading end of the stack and is adapted to be lowered and to be moved in unison with the conveyor (19) for carrying off the stacks.
EP82101388A 1981-02-26 1982-02-24 Method and means for manufacturing stacks of bags Expired EP0059420B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3107287A DE3107287C2 (en) 1981-02-26 1981-02-26 Method and device for producing stacks from bottom-welded plastic sacks
DE3107287 1981-02-26

Publications (2)

Publication Number Publication Date
EP0059420A1 EP0059420A1 (en) 1982-09-08
EP0059420B1 true EP0059420B1 (en) 1985-05-22

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EP82101388A Expired EP0059420B1 (en) 1981-02-26 1982-02-24 Method and means for manufacturing stacks of bags

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US (1) US4452597A (en)
EP (1) EP0059420B1 (en)
JP (1) JPS57157740A (en)
DE (1) DE3107287C2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3201170C1 (en) * 1982-01-16 1983-05-19 M. Lehmacher & Sohn Gmbh Maschinenfabrik, 5216 Niederkassel Device for cross-welding and cutting a double plastic sheet
DE3331069A1 (en) * 1983-08-29 1985-03-14 Windmöller & Hölscher, 4540 Lengerich METHOD AND DEVICE FOR UNLOCKING PUNCHED PACKS OF BAGS
FR2625945A1 (en) * 1988-01-15 1989-07-21 Lagain Georges DEVICE FOR STACKING BAGS IN A SYSTEM FOR MANUFACTURING BAGS OR BAGS, ETC. IN THERMOPLASTIC MATTER
DE19728371C1 (en) * 1997-07-03 1999-01-14 Lemo Maschb Gmbh Device for cross-welding separation and stack-wise collecting and blocking of bags made of a plastic film web, in particular shirt-carrying bags
CA2259785C (en) 1999-01-19 2008-07-29 Peter E. Sandford Jogger member, system and method for mounting jogger members and female and male blanking dies provided therewith
JP2005035682A (en) * 2003-07-15 2005-02-10 Komori Corp Chopper table
US8417374B2 (en) 2004-04-19 2013-04-09 Curt G. Joa, Inc. Method and apparatus for changing speed or direction of an article
US7703599B2 (en) * 2004-04-19 2010-04-27 Curt G. Joa, Inc. Method and apparatus for reversing direction of an article
US7708849B2 (en) 2004-04-20 2010-05-04 Curt G. Joa, Inc. Apparatus and method for cutting elastic strands between layers of carrier webs
US20050230037A1 (en) 2004-04-20 2005-10-20 Curt G. Joa, Inc. Staggered cutting knife
US7638014B2 (en) 2004-05-21 2009-12-29 Curt G. Joa, Inc. Method of producing a pants-type diaper
US7537215B2 (en) * 2004-06-15 2009-05-26 Curt G. Joa, Inc. Method and apparatus for securing stretchable film using vacuum
JP2006069763A (en) * 2004-09-03 2006-03-16 Fuji Xerox Co Ltd Sheet folding device
US7811403B2 (en) 2005-03-09 2010-10-12 Curt G. Joa, Inc. Transverse tab application method and apparatus
US8007484B2 (en) 2005-04-01 2011-08-30 Curt G. Joa, Inc. Pants type product and method of making the same
US7603660B2 (en) * 2005-06-01 2009-10-13 Microsoft Corporation Code coverage test selection
US7975584B2 (en) 2007-02-21 2011-07-12 Curt G. Joa, Inc. Single transfer insert placement method and apparatus
US7770712B2 (en) 2006-02-17 2010-08-10 Curt G. Joa, Inc. Article transfer and placement apparatus with active puck
US8172977B2 (en) 2009-04-06 2012-05-08 Curt G. Joa, Inc. Methods and apparatus for application of nested zero waste ear to traveling web
US8016972B2 (en) 2007-05-09 2011-09-13 Curt G. Joa, Inc. Methods and apparatus for application of nested zero waste ear to traveling web
US7780052B2 (en) 2006-05-18 2010-08-24 Curt G. Joa, Inc. Trim removal system
US9433538B2 (en) 2006-05-18 2016-09-06 Curt G. Joa, Inc. Methods and apparatus for application of nested zero waste ear to traveling web and formation of articles using a dual cut slip unit
US10456302B2 (en) 2006-05-18 2019-10-29 Curt G. Joa, Inc. Methods and apparatus for application of nested zero waste ear to traveling web
US9622918B2 (en) 2006-05-18 2017-04-18 Curt G. Joe, Inc. Methods and apparatus for application of nested zero waste ear to traveling web
US8287266B2 (en) 2006-06-16 2012-10-16 GKN Aerospace Services Structures, Corp. Device for performing consolidation and method of use thereof
US9550306B2 (en) 2007-02-21 2017-01-24 Curt G. Joa, Inc. Single transfer insert placement and apparatus with cross-direction insert placement control
US9944487B2 (en) 2007-02-21 2018-04-17 Curt G. Joa, Inc. Single transfer insert placement method and apparatus
US8398793B2 (en) 2007-07-20 2013-03-19 Curt G. Joa, Inc. Apparatus and method for minimizing waste and improving quality and production in web processing operations
US9387131B2 (en) 2007-07-20 2016-07-12 Curt G. Joa, Inc. Apparatus and method for minimizing waste and improving quality and production in web processing operations by automated threading and re-threading of web materials
US8182624B2 (en) 2008-03-12 2012-05-22 Curt G. Joa, Inc. Registered stretch laminate and methods for forming a registered stretch laminate
US8673098B2 (en) 2009-10-28 2014-03-18 Curt G. Joa, Inc. Method and apparatus for stretching segmented stretchable film and application of the segmented film to a moving web
US9089453B2 (en) 2009-12-30 2015-07-28 Curt G. Joa, Inc. Method for producing absorbent article with stretch film side panel and application of intermittent discrete components of an absorbent article
US8460495B2 (en) 2009-12-30 2013-06-11 Curt G. Joa, Inc. Method for producing absorbent article with stretch film side panel and application of intermittent discrete components of an absorbent article
US8663411B2 (en) 2010-06-07 2014-03-04 Curt G. Joa, Inc. Apparatus and method for forming a pant-type diaper with refastenable side seams
US9603752B2 (en) 2010-08-05 2017-03-28 Curt G. Joa, Inc. Apparatus and method for minimizing waste and improving quality and production in web processing operations by automatic cuff defect correction
US9566193B2 (en) 2011-02-25 2017-02-14 Curt G. Joa, Inc. Methods and apparatus for forming disposable products at high speeds with small machine footprint
US8656817B2 (en) 2011-03-09 2014-02-25 Curt G. Joa Multi-profile die cutting assembly
USD684613S1 (en) 2011-04-14 2013-06-18 Curt G. Joa, Inc. Sliding guard structure
US8820380B2 (en) 2011-07-21 2014-09-02 Curt G. Joa, Inc. Differential speed shafted machines and uses therefor, including discontinuous and continuous side by side bonding
DK2628472T3 (en) 2012-02-20 2016-04-11 Joa Curt G Inc A method of forming bonds between the separate components of the disposable
US9908739B2 (en) 2012-04-24 2018-03-06 Curt G. Joa, Inc. Apparatus and method for applying parallel flared elastics to disposable products and disposable products containing parallel flared elastics
US9283683B2 (en) 2013-07-24 2016-03-15 Curt G. Joa, Inc. Ventilated vacuum commutation structures
USD703247S1 (en) 2013-08-23 2014-04-22 Curt G. Joa, Inc. Ventilated vacuum commutation structure
USD704237S1 (en) 2013-08-23 2014-05-06 Curt G. Joa, Inc. Ventilated vacuum commutation structure
USD703712S1 (en) 2013-08-23 2014-04-29 Curt G. Joa, Inc. Ventilated vacuum commutation structure
USD703248S1 (en) 2013-08-23 2014-04-22 Curt G. Joa, Inc. Ventilated vacuum commutation structure
USD703711S1 (en) 2013-08-23 2014-04-29 Curt G. Joa, Inc. Ventilated vacuum communication structure
US9289329B1 (en) 2013-12-05 2016-03-22 Curt G. Joa, Inc. Method for producing pant type diapers
EP3002066A1 (en) * 2014-10-02 2016-04-06 Starlinger & Co. Gesellschaft m.b.H. Device for cooling of adhesive applied to the surface of bag bodies
CN104786556A (en) * 2015-04-16 2015-07-22 浙江超伟机械有限公司 Bag making machine
US10167156B2 (en) 2015-07-24 2019-01-01 Curt G. Joa, Inc. Vacuum commutation apparatus and methods
CN106739153B (en) * 2016-12-05 2019-06-11 三峡大学 Outer molding negative pressure tunnel
CN108146019A (en) * 2016-12-05 2018-06-12 宜昌市福沃特科技有限公司 Bag with square bottom production line
CN106494000B (en) * 2016-12-05 2019-05-14 三峡大学 Reel Bag Material negative-pressure adsorption tinuous production
US11737930B2 (en) 2020-02-27 2023-08-29 Curt G. Joa, Inc. Configurable single transfer insert placement method and apparatus

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1054818B (en) * 1954-09-16 1959-04-09 Gordon William French Device for the delivery of bags, envelopes, sheets and similar objects to machines producing such objects
US2925119A (en) * 1957-08-08 1960-02-16 Chippewa Plastics Inc Machine for heat sealing plastic material
US3074710A (en) * 1959-06-02 1963-01-22 Liberty Folder Company Tabloid folding machine
US3863549A (en) * 1973-04-23 1975-02-04 Union Carbide Corp Gripper-transfer device for plastic bags
US3905593A (en) * 1973-05-07 1975-09-16 Super Laundry Mach Co Flatwork folding system
BE848297A (en) * 1976-11-12 1977-03-01 MACHINE FOR FORMING PLASTIC BAGS.
DE2746670C2 (en) * 1977-10-18 1984-07-19 Stiegler, Karl Heinz, 7000 Stuttgart Device for stacking bags
US4183515A (en) * 1978-06-28 1980-01-15 Union Carbide Corporation Bag folding machine
US4317656A (en) * 1979-02-17 1982-03-02 Karl Heinz Stiegler Article-deflecting switching means for a system of article conveyors

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JPH0464852B2 (en) 1992-10-16
US4452597A (en) 1984-06-05
JPS57157740A (en) 1982-09-29
EP0059420A1 (en) 1982-09-08
DE3107287A1 (en) 1982-09-09
DE3107287C2 (en) 1984-06-20

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