EP0498273B1 - Method and apparatus for packaging a stack of flat articles - Google Patents
Method and apparatus for packaging a stack of flat articles Download PDFInfo
- Publication number
- EP0498273B1 EP0498273B1 EP92101372A EP92101372A EP0498273B1 EP 0498273 B1 EP0498273 B1 EP 0498273B1 EP 92101372 A EP92101372 A EP 92101372A EP 92101372 A EP92101372 A EP 92101372A EP 0498273 B1 EP0498273 B1 EP 0498273B1
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- European Patent Office
- Prior art keywords
- stack
- folded
- onto
- sheeting
- packaging
- 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 - Lifetime
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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
- B65B11/00—Wrapping, e.g. partially or wholly enclosing, articles or quantities of material, in strips, sheets or blanks, of flexible material
- B65B11/06—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths
- B65B11/08—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a single straight path
- B65B11/10—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a single straight path to fold the wrappers in tubular form about contents
- B65B11/12—Wrapping articles, or quantities of material, by conveying wrapper and contents in common defined paths in a single straight path to fold the wrappers in tubular form about contents and then to form closing folds of similar form at opposite ends of the tube
Definitions
- the invention relates to a method and a device for packaging a stack of flat objects according to the preamble of claims 1 and 4, respectively.
- a method and a device according to the preambles of claims 1 and 4 are known from DE-C-244 356.
- the object of the invention is to propose a method of the type specified at the outset, which can be carried out using devices with a reduced constructional and structural outlay.
- this object is achieved in a method of the generic type by the features of the characterizing part of claim 1.
- the method according to the invention can be carried out mechanically with a reduced constructional and structural outlay, because only one retractable folding element has to be provided for turning in opposite sides of the end regions of the wrapping projecting over the stack, the folding element being designed such that the parts are then extended laterally for painting can.
- this first folding element basically only devices must be provided for folding the corner envelopes formed by spreading out the first folded page.
- Another particular advantage is that the fact that the corner folds are formed by spreading out only one folded-in side means that they are open at the side, so that the extended spreading folding elements can be pulled out of the extended corner folds at right angles to the spreading direction. Due to the simplified method, a machine can be built to carry it out, in which the complete wrapping and packaging of the stack can be carried out in only one station.
- stacks are to be packed which, due to the nature of the stacked flat objects, tend to spring open, such as stacks of bags provided with handles, the stacks exert a strong force on the wrapping after being relieved by the means which compress them, under which the wrapping the protruding end areas of the envelopes formed bottom-like closures can burst again.
- Stacks of bags with handles the thickness of which is greater than the thickness of the bag walls lying flat on top of one another, are usually layered to form stacks with a straight edge in that partial stacks are formed, which are then stacked so as to be offset from the stacks in such a way that handle areas lying one above the other between the bottom areas of two partial stacks lie.
- the packaged bags provided with handles can also be folded over a transverse line to reduce their length.
- the "width" of a bag in the packaged stack in the sense of the preamble of claim 1 is therefore also to be understood as the width of the bag folded before stacking.
- compressed stacks of this type tend to spring open, so that they exert considerable explosive forces on a packaging enveloping them.
- the packaging casing formed by the method according to the invention is particularly suitable for packaging stacks that tend to spring open, such as stacks of bags with handles of greater thickness, because they are folded Formed lateral closures of the wrapping can counteract a springing up of the packaged stack, as a result of the fact that the corner folds are turned outwards onto the two narrow sides of the wrapping which adjoin the initially still open end face. Since the corner folds are therefore not turned inwards on the closure side but rather outwards, the adhesive bonding them to the covering is not subjected to shearing, but at most to unfolding, so that a largely dimensionally stable locking bolt is formed by the folded edge alone.
- end regions of the tubular sleeve are expediently designed to be longer than half the width of the still open end face, but shorter than the entire width. This configuration ensures that the mutually opposite sides of the end regions of the envelope overlap one another, so that a tight seal is formed.
- the opposite side of the end region folded in by spreading out the first folded-in side is also provided with glue applications, for example in the form of glue dabs, on the inside in the overlap region.
- a device for performing the method according to the invention is characterized according to the invention by the features of claim 4.
- the expandable folding plate pairs are appropriately beveled at their end sides by 45 ° in accordance with the angle of the corner folds that are formed.
- glue application nozzles are provided in a known manner, which provide the folded sides and corner folds or the wrapped narrow sides with glue applications.
- first press channel 1 shows a first press channel 1, in which a compressed stack of bags 3 is pushed in the direction of a packaging web section 4 by means of a slide 2.
- the packaging web section 4 has the length required for wrapping the stack and hangs in a slot formed by a correspondingly small distance between the first press channel 1 and the second press channel 5.
- the stack of bags 3 has already been pushed into the press channel 5 by the packaging web section 4, which acts as if it were a curtain, the slider 2 already being in its partially retracted position.
- the second press channel 5 consists essentially of a lower fixed plate 8 and an upper rake-like grid formed from individual bars 9. The width of the rake-like grid is dimensioned such that the packaging web section 4 protrudes laterally beyond the stack 3 on both end faces, so that folding elements can act on the end regions of the packaging web section.
- FIG. 4 The position of the stack 3 shown in FIG. 2 and the packaging web section partially enveloping it is shown in perspective in FIG. 4. From Fig. 4 it can also be seen that partial stacks of the bags are offset from one another in such a way that the handles of a partial stack each lie between the bottom areas of adjacent partial stacks. From Fig. 4 it is clear that the resilience of the stack formed from the partial stacks is strongest in the area of the handles 10 because the individual handles consist of material of greater thickness than the thickness of the material of the individual bags. By elements not shown is then gem. Fig. 4 knocked down the upper flag 7 of the packaging web section and provided the lower edge of the flag 7 with a row of glue dots 11. Then the lower flag 6 is flipped upwards and pressed onto the glue point row 11, so that the tubular or sleeve-like wrapping of the stack shown in FIG. 6 results from the wrapping web section wrapped around it.
- a pair of folding plates 12 moves into the area of the packaging web section 4 projecting laterally from the stack, so that the configuration shown in FIG. 7 results.
- two glue points 13 and 14 are applied to the inside of the flag 7 and then the two folding plates of the pair of folding plates 12 move apart in the direction of arrow B (FIG. 8).
- the extended position of the two folding plates of the pair of folding plates 12 is shown in FIG. 9.
- further glue pads 15 are applied to the narrow sides of the packaging, onto which the corner folds 16 and 17 are folded by means (not shown) after the folding plate pair 12 has been moved out.
Description
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Verpacken eines Stapels flacher Gegenstände gemäß dem oberbegriff der Ansprüche 1 bzw 4.The invention relates to a method and a device for packaging a stack of flat objects according to the preamble of claims 1 and 4, respectively.
Aus der US-A- 37 71 280 ist ein Verfahren bekannt, zu dessen Ausführung eine Maschine mit drei übereinander angeordneten Stationen erforderlich ist, in denen aufeinander folgend das einander überlappende Einschlagen gegenüberliegender Seitenbereiche der Endbereiche der bereits zuvor außerhalb der Station gebildeten schlauchartigen Einhüllung jedes Stapels unter Ausbildung der Eckeinschläge erfolgt, die sodann ebenfalls einander überlappend zur Bildung eines kreuzbodenartigen Verschlusses eingeschlagen werden. Um den Stapel zum aufeinanderfolgenden Ausführen der einzelnen Einfalt- und Einschlagvorgänge von einer Station zur anderen fördern zu können, muß eine besondere Hub- und Absenkeinrichtung vorgesehen werden. Zur Durchführung des bekannten Verfahrens sind daher komplizierte Bearbeitungsvorgange erforderlich, die sich nur mit einem erheblichen konstruktiven und maschinellen Aufwand bewältigen lassen.From US-A-37 71 280 a method is known, the execution of which requires a machine with three superposed stations, in which successive the overlapping wrapping of opposite side areas of the end areas of the tube-like wrapping of each stack which has already been formed outside the station takes place with the formation of the corner wraps, which are then also wrapped overlapping one another to form a cross-floor-like closure. A special lifting and lowering device must be provided in order to be able to convey the stack for the successive execution of the individual folding and wrapping processes from one station to another. To carry out the known method, complicated machining processes are therefore required, which can only be accomplished with considerable constructional and mechanical effort.
Ein Verfahren und eine Vorrichtung gemäß den Oberbegriffen der Ansprüche 1 bzw. 4 sind aus der DE-C- 244 356 bekannt.A method and a device according to the preambles of claims 1 and 4 are known from DE-C-244 356.
Aufgabe der Erfindung ist es, ein Verfahren der eingangs angegebenen Art vorzuschlagen, das sich mit Vorrichtungen mit einem verringerten konstruktiven und baulichen Aufwand ausführen läßt.The object of the invention is to propose a method of the type specified at the outset, which can be carried out using devices with a reduced constructional and structural outlay.
Erfindungsgemäß wird diese Aufgabe bei einem Verfahren der gattungsgemäßen Art durch die Merkmale des Kennzeichens des Anspruchs 1 gelöst. Das erfindungsgemäße Verfahren läßt sich mit einem verringerten konstruktiven und baulichen Aufwand maschinell ausführen, weil zum Einschlagen gegenüberliegender Seiten der Endbereiche der den Stapel überragenden Umhüllung nur ein einfahrbares Faltelement vorgesehen werden muß, das derart geteilt ausgebildet ist, daß die Teile anschließend zum Ausstreichen seitlich ausgefahren werden können. Neben diesem ersten Einfaltelement müssen sodann grundsätzlich nur noch Einrichtungen zum Umlegen der durch Ausstreichen der ersten eingefalteten Seite gebildeten Eckumschläge vorgesehen werden. Von besonderem Vorteil ist weiterhin, daß dadurch, daß die Eckeinschläge durch Ausstreichen nur einer eingefalteten Seite ausgebildet werden, diese seitlich offen sind, so daß die ausgefahrenen ausstreichenden Faltelemente rechtwinkelig zu der Ausstreichrichtung aus den ausgezogenen Eckeinschlägen herausgezogen werden können. Aufgrund des vereinfachten Verfahrens läßt sich somit eine Maschine zu dessen Durchführung bauen, in der die vollständige Einhüllung und Verpackung des Stapels in nur einer Station erfolgen kann.According to the invention, this object is achieved in a method of the generic type by the features of the characterizing part of claim 1. The method according to the invention can be carried out mechanically with a reduced constructional and structural outlay, because only one retractable folding element has to be provided for turning in opposite sides of the end regions of the wrapping projecting over the stack, the folding element being designed such that the parts are then extended laterally for painting can. In addition to this first folding element then basically only devices must be provided for folding the corner envelopes formed by spreading out the first folded page. Another particular advantage is that the fact that the corner folds are formed by spreading out only one folded-in side means that they are open at the side, so that the extended spreading folding elements can be pulled out of the extended corner folds at right angles to the spreading direction. Due to the simplified method, a machine can be built to carry it out, in which the complete wrapping and packaging of the stack can be carried out in only one station.
Sollen Stapel verpackt werden, die aufgrund der Art der gestapelten flachen Gegenstände zum Auffedern neigen, wie beispielsweise Stapel von mit Handgriffen versehenen Beuteln, üben die Stapel nach deren Entlastung durch die diese zusammendrückenden Mittel auf die Umhüllung eine starke Kraft aus, unter der die durch Einschlagen der überragenden Endbereiche der Umhüllungen gebildeten bodenartigen Verschlüsse wieder aufplatzen können. Stapel aus Beuteln mit Handgriffen, deren Dicke größer ist als die Dicke der flach aufeinanderliegenden Beutelwandungen, werden üblicherweise dadurch zu kantengeraden Stapeln geschichtet, daß Teilstapel gebildet werden, die dann derart versetzt zu den Stapeln aufgeschichtet werden, daß übereinander liegende Handgriffbereiche zwischen den Bodenbereichen zweier Teilstapel liegen. Die verpackten mit Handgriffen versehenen Beutel können auch zur Verringerung ihrer Länge um eine Querlinie auf sich gefaltet sein. Unter der "Breite" eines Beutels im verpackten Stapel im Sinne des Oberbegriffs des Patentanspruchs 1 ist daher auch die Breite des vor dem Stapeln gefalteten Beutels zu verstehen. Trotz dieser Schichtung neigen zusammengedrückte Stapel dieser Art zum Auffedern, so daß diese auf eine diese einhüllende Verpackung erhebliche Sprengkräfte ausüben. Die nach dem erfindungsgemäßen Verfahren gebildete Verpackungshülle ist besonders geeignet, zum Auffedern neigende Stapel, wie Stapel aus Beuteln mit Handgriffen größerer Dicke, zu verpacken, weil die durch Falten gebildeten seitlichen Verschlüsse der Umhüllung einem Auffedern des verpackten Stapels dadurch einen größeren Widerstand entgegenzusetzen vermögen, daß die Eckeinschläge nach außen auf die an die zunächst noch offene Stirnseite angrenzenden beiden Schmalseiten der Umhüllung umgeschlagen sind. Da die Eckeinschläge also nicht nach innen auf die Verschlußseite, sondern nach außen umgeschlagen sind, wird die diese mit der Umhüllung verbindende Verklebung nicht auf Abscheren beansprucht, sondern höchstens auf Auffalten, so daß schon durch die Faltkante allein ein weitgehend formstabiler Verschlußriegel gebildet wird.If stacks are to be packed which, due to the nature of the stacked flat objects, tend to spring open, such as stacks of bags provided with handles, the stacks exert a strong force on the wrapping after being relieved by the means which compress them, under which the wrapping the protruding end areas of the envelopes formed bottom-like closures can burst again. Stacks of bags with handles, the thickness of which is greater than the thickness of the bag walls lying flat on top of one another, are usually layered to form stacks with a straight edge in that partial stacks are formed, which are then stacked so as to be offset from the stacks in such a way that handle areas lying one above the other between the bottom areas of two partial stacks lie. The packaged bags provided with handles can also be folded over a transverse line to reduce their length. The "width" of a bag in the packaged stack in the sense of the preamble of claim 1 is therefore also to be understood as the width of the bag folded before stacking. Despite this stratification, compressed stacks of this type tend to spring open, so that they exert considerable explosive forces on a packaging enveloping them. The packaging casing formed by the method according to the invention is particularly suitable for packaging stacks that tend to spring open, such as stacks of bags with handles of greater thickness, because they are folded Formed lateral closures of the wrapping can counteract a springing up of the packaged stack, as a result of the fact that the corner folds are turned outwards onto the two narrow sides of the wrapping which adjoin the initially still open end face. Since the corner folds are therefore not turned inwards on the closure side but rather outwards, the adhesive bonding them to the covering is not subjected to shearing, but at most to unfolding, so that a largely dimensionally stable locking bolt is formed by the folded edge alone.
Zweckmäßigerweise werden die Endbereiche der schlauchförmigen Manschette länger ausgebildet als die halbe Breite der noch offenen Stirnseite, aber kürzer als die ganze Breite. Diese Ausgestaltung stellt sicher, daß die eingeschlagenen einander gegenüberliegenden Seiten der Endbereiche der Umhüllung einander überlappen, so daß ein dichter Verschluß gebildet wird.The end regions of the tubular sleeve are expediently designed to be longer than half the width of the still open end face, but shorter than the entire width. This configuration ensures that the mutually opposite sides of the end regions of the envelope overlap one another, so that a tight seal is formed.
Um den nach dem erfindungsgemäßen Verfahren gebildeten Verschluß zu sichern, wird auch die durch Ausstreichen der zuerst eingefalteten Seite eingeschlagene gegenüberliegende Seite des Endbereichs auf ihrer Innenseite im Überlappungsbereich mit Leimaufträgen, beispielsweise in Form von Leimtupfern, versehen.In order to secure the closure formed by the method according to the invention, the opposite side of the end region folded in by spreading out the first folded-in side is also provided with glue applications, for example in the form of glue dabs, on the inside in the overlap region.
Eine Vorrichtung zur Durchführung des erfindungsgemäßen Verfahrens ist erfindungsgemäß durch die Merkmale des Anspruchs 4 gekennzeichnet.A device for performing the method according to the invention is characterized according to the invention by the features of claim 4.
Die spreizbaren Faltblechpaare sind entsprechend der sich ausbildenden Winkel der Eckeinschläge an ihren Endseiten zweckmäßigerweise um 45° abgeschrägt.The expandable folding plate pairs are appropriately beveled at their end sides by 45 ° in accordance with the angle of the corner folds that are formed.
Zusätzlich sind in bekannter Weise Leimauftragsdüsen vorgesehen, die die eingefalteten Seiten und Eckeinschläge bzw. die eingehüllten Schmalseiten mit Leimaufträgen versehen.In addition, glue application nozzles are provided in a known manner, which provide the folded sides and corner folds or the wrapped narrow sides with glue applications.
Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung naher erläutert. In dieser zeigt
- Fig. 1
- aufeinander folgende Preßkanäle, in denen die zu verpackenden zusammengedrückten Stapel vorgeschoben werden, in schematischer Seitenansicht, wobei in einem zwischen den Kanälen befindlichen Spalt ein Verpackungsbahnabschnitt gehalten ist,
- Fig. 2
- eine der Fig. 1 entsprechende Darstellung, in der der zu verpackende Stapel bereits unter schlaufenförmiger Mitnahme in den zweiten Preßkanal eingeschoben ist,
- Fig. 3
- eine Draufsicht auf den zweiten Preßkanal, in dem ein in einen Verpackungsbahnabschnitt schlauchartig eingehüllter Stapel gehalten ist,
- Fig. 4
- den zu verpackenden Stapel nach den Fig. 2 und 3 mit dem drei Seiten einhüllenden Verpackungsbahnabschnitt in perspektivischer Darstellung,
- Fig. 5
- eine der Fig. 4 entsprechende Darstellung, bei der der obere Endbereich des Verpackungsbahnabschnitts über die Stapelrückseite gelegt ist,
- Fig. 6
- eine perspektivische Ansicht des schlauchartig in einen Verpackungsbahnabschnitt eingehüllten Stapels, wobei die den Stapel überragenden Endbereiche der Einhüllung noch nicht zu einem Verschluß gefaltet sind,
- Fig. 7
- eine perspektivische Ansicht des Stapels nach Fig. 6, bei dem eine Seite eines Endbereichs der Umhüllung durch eingefahrene Faltbleche eingefaltet ist,
- Fig. 8
- eine perspektivische Darstellung des Stapels nach Fig. 7 mit dem eingefahrenen Faltblechpaar aus anderer Sicht,
- Fig. 9
- eine den Fig. 7 und 8 entsprechende Darstellung nach dem Ausstreichen der Eckeinschläge durch die auseinander gefahrenen Faltbleche des Faltblechpaares und
- Fig. 10
- eine perspektivische Darstellung des in einen Verpackungsbahnabschnitt verpackten Stapels.
- Fig. 1
- successive press channels, in which the compressed stacks to be packed are advanced, in a schematic side view, a packaging web section being held in a gap between the channels,
- Fig. 2
- 1 shows a representation corresponding to FIG. 1, in which the stack to be packaged is already inserted into the second press channel with loop-shaped entrainment,
- Fig. 3
- 3 shows a plan view of the second press channel in which a stack which is encased in a tubular manner in a packaging web section is held,
- Fig. 4
- 2 and 3 with the three-sided enveloping packaging web section in a perspective view,
- Fig. 5
- 4 shows a representation corresponding to FIG. 4, in which the upper end region of the packaging web section is placed over the back of the stack,
- Fig. 6
- a perspective view of the hose-like wrapped in a packaging web section Stack, the end regions of the wrapping projecting beyond the stack not yet being folded into a closure,
- Fig. 7
- 6 shows a perspective view of the stack according to FIG. 6, in which one side of an end region of the wrapping is folded in by retracted folding sheets,
- Fig. 8
- 7 is a perspective view of the stack according to FIG. 7 with the retracted folding plate pair,
- Fig. 9
- a representation corresponding to FIGS. 7 and 8 after the corner folds have been struck out by the expanded folding plates of the pair of folding plates and
- Fig. 10
- a perspective view of the stack packed in a packaging web section.
Aus Fig. 1 ist ein erster Preßkanal 1 ersichtlich, in dem mittels eines Schiebers 2 ein zusammengepreßter Beutelstapel 3 in Richtung auf einen Verpackungsbahnabschnitt 4 vorgeschoben wird. Der Verpackungsbahnabschnitt 4 weist die zum Einwickeln des Stapels erforderliche Länge auf und hängt in einem Schlitz, der durch einen entsprechend geringen Abstand zwischen dem ersten Preßkanal 1 und dem zweiten Preßkanal 5 gebildet wird.1 shows a first press channel 1, in which a compressed stack of bags 3 is pushed in the direction of a packaging web section 4 by means of a slide 2. The packaging web section 4 has the length required for wrapping the stack and hangs in a slot formed by a correspondingly small distance between the first press channel 1 and the
Bei der aus Fig. 2 ersichtlichen Darstellung ist der Beutelstapel 3 bereits durch den gleichsam wie ein Vorhang wirkenden Verpackungsbahnabschnitt 4 in den Preßkanal 5 hineingeschoben worden, wobei sich der Schieber 2 bereits wieder in seiner teilweise zurückgezogenen Stellung befindet. Aus Fig. 2 ist weiterhin ersichtlich, daß der eingeschobene Stapel durch den Verpackungsbahnabschnitt auf drei Seiten eingehüllt ist, während obere und untere Fahnen 6,7 die hintere Seite des Stapels überragen. Der zweite Preßkanal 5 besteht im wesentlichen aus einer unteren festen Platte 8 sowie aus einem oberen aus einzelnen Stäben 9 gebildeten rechenartigen Gitter. Die Breite des rechenartigen Gitters ist dabei so bemessen, daß der Verpackungsbahnabschnitt 4 zu beiden Stirnseiten des Stapels 3 seitlich über dieses vorsteht, so daß an den Endbereichen des Verpackungsbahnabschnitts Faltelemente angreifen können.In the illustration shown in FIG. 2, the stack of bags 3 has already been pushed into the
Die aus Fig. 2 ersichtliche Lage des Stapels 3 und der diesen teilweise einhüllende Verpackungsbahnabschnitt ist in Fig. 4 perspektivisch dargestellt. Aus Fig. 4 ist weiterhin ersichtlich, daß Teilstapel der Beutel in der Weise versetzt zueinander liegen, daß die Handgriffe eines Teilstapels jeweils zwischen den Bodenbereichen angrenzender Teilstapel liegen. Aus Fig. 4 wird deutlich, daß die Auffederung des aus den Teilstapeln gebildeten Stapels im Bereich der Handgriffe 10 am stärksten ist, weil die einzelnen Handgriffe aus Material größerer Dicke gegenüber der Dicke des Materials der einzelnen Beutel bestehen. Durch nicht dargestellte Elemente wird dann gem. Fig. 4 die obere Fahne 7 des Verpackungsbahnabschnitt nach unten geschlagen und der untere Rand der Fahne 7 mit einer Leimpunktreihe 11 versehen. Sodann wird die untere Fahne 6 nach oben geschlagen und an die Leimpunktreihe 11 angedrückt, so daß sich die aus Fig. 6 ersichtliche schlauch- oder manschetcenarcige Einhüllung des Stapels durch den um diesen herumgeschlagenen Packungsbahnabschnitt ergibt.The position of the stack 3 shown in FIG. 2 and the packaging web section partially enveloping it is shown in perspective in FIG. 4. From Fig. 4 it can also be seen that partial stacks of the bags are offset from one another in such a way that the handles of a partial stack each lie between the bottom areas of adjacent partial stacks. From Fig. 4 it is clear that the resilience of the stack formed from the partial stacks is strongest in the area of the
Sodann fährt von der Seite her in der aus Fig. 7 ersichtlichen Weise ein Faltblechpaar 12 in den den Stapel seitlich überragenden Bereich des Verpackungsbahnabschnitts 4 hinein, so daß sich die aus Fig. 7 ersichtliche Konfiguration ergibt. Anschließend werden zwei Leimpunkte 13 und 14 auf die Innenseite der Fahne 7 aufgebracht und sodann fahren die beiden Faltbleche des Faltblechpaares 12 in Pfeilrichtung B (Fig. 8) auseinander. Die auseinandergefahrene Stellung der beiden Faltbleche des Faltblechpaares 12 ist in Fig. 9 dargestellt. Sobald dieser Verpackungszustand erreicht ist, werden auf die Schmalseiten der Umpackung weitere Leimtupfer 15 aufgetragen, auf die die Eckeinschläge 16 und 17 nach dem Herausfahren des Faltblechpaares 12 durch nicht dargestellte Mittel umgelegt werden.Then, from the side in the manner shown in FIG. 7, a pair of
Durch das Umlegen und Verkleben der Eckeinschläge 16 und 17 auf den Schmalseiten der Umhüllung wird erreicht, daß die in Richtung des Pfeils C (Fig. 10) wirkenden Auffederungskräfte keinerlei Scherkräfte auf die durch die Leimpunkte 15 gebildeten Klebestellen ausüben können. Wenn der in der beschriebenen Weise eingewickelte und verpackte Beutelstapel 3 aus dem zweiten Preßkanal 5 rausgeschoben wird, besteht somit nicht mehr die Gefahr, daß die den Stapel einfassende Umhüllung durch die Auffederungskräfte des zusammengepreßten Seutelstapels gesprengt wird.By folding and gluing the corner turns 16 and 17 on the narrow sides of the casing it is achieved that the spring forces acting in the direction of arrow C (FIG. 10) cannot exert any shear forces on the glue points formed by the glue points 15. If the wrapped and packaged bag stack 3 is pushed out of the
Claims (4)
- Method for packaging a stack of flat articles,
preferably a stack of bags provided with handles, the height of which stack is greater than the width of a bag,
in a wrap of packaging sheeting of paper and/or plastics or similar,
in which a section of sheeting (4) is wrapped around the preferably compressed stack (3) and the edge areas (6, 7) of the sheeting (4) overlapping each other on one side of the stack are bonded together to form a tubular sleeve enveloping said stack, and
in which the end sections of the tubular sleeve laterally protruding beyond the stack are folded at their opposing sides onto the end faces of the stack with the formation of corner tucks (16, 17), and each corner tuck is folded over onto an enveloped stack side and bonded to this,
characterised in that
initially one side of each end section is folded in onto said end face along the longer edge of the still open end face and immediately thereafter the adjacent side portions of each end section are extended outward and smoothed in the plane of the folded-in flap so that, as a result, the opposing side of each end section is folded around the opposing longer edge onto the end face with the formation of corner tucks (16, 17) protruding beyond the stack, and
that the corner tucks (16, 17) are then folded onto and bonded to the two narrow sides of the enveloping sleeve adjacent to the initially still open end face. - Method according to Claim 1, characterised in that the end sections of the tubular sleeve are longer in their formation than half the width of the still open end faces, but shorter than their full width.
- Method according to Claim 1 or 2, characterised in that the opposing side of the end section which is folded down as a result of extending and smoothing out the initially folded flap is provided on its inside surface with glue coatings in the overlap region.
- Apparatus for performing the method according to one of claims 1 to 3,
with mutually parallel grids and/or plates (8, 9) for pressing the compacted stack (3) together, between which grids and/or plates (8, 9) the stack (3) is inserted taking with it a section of sheeting (4), located at the inlet of said grids and/or plates, in the shape of an enveloping loop-like sleeve held on three sides,
with elements which fold the edge areas (6, 7) of the sheeting (4) one after the other onto the fourth stack face,
and with elements which fold over the corner tucks (16, 17)
characterised
by extendable folding plate pairs (12) which fold one side of the end section of the sleeve-like envelope over a stack edge and then extend laterally in order to pull out the corner tucks (16, 17) so that they protrude over the adjacent stack edges.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4103745 | 1991-02-07 | ||
| DE4103745A DE4103745A1 (en) | 1991-02-07 | 1991-02-07 | METHOD AND DEVICE FOR PACKING A STACK OF FLAT OBJECTS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0498273A1 EP0498273A1 (en) | 1992-08-12 |
| EP0498273B1 true EP0498273B1 (en) | 1995-03-29 |
Family
ID=6424583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92101372A Expired - Lifetime EP0498273B1 (en) | 1991-02-07 | 1992-01-28 | Method and apparatus for packaging a stack of flat articles |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5249408A (en) |
| EP (1) | EP0498273B1 (en) |
| JP (1) | JP3386485B2 (en) |
| CA (1) | CA2060765C (en) |
| DE (2) | DE4103745A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0798212B1 (en) * | 1996-03-27 | 2000-01-19 | The Procter & Gamble Company | A method for wrapping under tension units of compressible flexible articles |
| JP4548580B2 (en) * | 2004-06-02 | 2010-09-22 | 東洋製罐株式会社 | Bag mouth folding device and bag mouth folding method |
| US7360344B2 (en) * | 2004-09-17 | 2008-04-22 | Fpna Acquisition Corporation | Method and apparatus for sleeve or band-type packaging of a compressible article |
| EP1860031B1 (en) * | 2006-05-26 | 2009-10-28 | M T C - Macchine Trasformazione Carta S.r.l. | Paper feeding device for a banding machine for logs of sheet material |
| DE602006019558D1 (en) * | 2006-05-26 | 2011-02-24 | M T C Macchine Trasformazione Carta S R L | Device for wrapping sheet stacks |
| US9296171B2 (en) * | 2008-03-11 | 2016-03-29 | Frito-Lay North America, Inc. | Method for making a flat bottom pillow pouch |
| DE102012016698B4 (en) * | 2012-08-24 | 2020-01-02 | Khs Gmbh | Device for packaging groups of objects combined into packaging units |
| CN103043243B (en) * | 2013-01-15 | 2015-11-25 | 王秀来 | A kind of tail folding device of plastic bag auto-folder strapper |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE244356C (en) * | ||||
| US1285646A (en) * | 1914-04-08 | 1918-11-26 | Chester T Drake | Wrapping-machine. |
| US1575723A (en) * | 1921-09-26 | 1926-03-09 | Package Machinery Co | Wrapping machine and method of wrapping articles |
| GB951268A (en) * | 1961-10-10 | 1964-03-04 | Forgrove Mach | Improvements in methods of wrapping cartons and packages |
| US3507089A (en) * | 1967-05-11 | 1970-04-21 | Brown & Williamson Tobacco | Bundling machine |
| US3619976A (en) * | 1970-01-27 | 1971-11-16 | William C Kerker | Bag bundling machine |
| US3771280A (en) * | 1972-04-10 | 1973-11-13 | Potdevin Machine Co | End folding machine |
| JPS5326535B2 (en) * | 1973-04-07 | 1978-08-02 | ||
| JPS5311915B2 (en) * | 1973-07-19 | 1978-04-25 | ||
| JPS571024A (en) * | 1981-05-01 | 1982-01-06 | Hakura Seiki Kk | Automatic sealing device for bagged sliced bread |
| JPS5926411A (en) * | 1982-08-05 | 1984-02-10 | ニチパツク株式会社 | Automatic packer |
| JPS649103A (en) * | 1987-06-29 | 1989-01-12 | Gakujo Nakamura | Packaging apparatus |
-
1991
- 1991-02-07 DE DE4103745A patent/DE4103745A1/en not_active Withdrawn
-
1992
- 1992-01-28 EP EP92101372A patent/EP0498273B1/en not_active Expired - Lifetime
- 1992-01-28 DE DE59201738T patent/DE59201738D1/en not_active Expired - Lifetime
- 1992-01-31 JP JP01686392A patent/JP3386485B2/en not_active Expired - Fee Related
- 1992-02-06 CA CA002060765A patent/CA2060765C/en not_active Expired - Lifetime
- 1992-02-07 US US07/832,592 patent/US5249408A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE59201738D1 (en) | 1995-05-04 |
| CA2060765A1 (en) | 1992-08-08 |
| US5249408A (en) | 1993-10-05 |
| CA2060765C (en) | 2002-12-10 |
| JPH05278705A (en) | 1993-10-26 |
| EP0498273A1 (en) | 1992-08-12 |
| DE4103745A1 (en) | 1992-08-13 |
| JP3386485B2 (en) | 2003-03-17 |
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