EP0285940A2 - Bag with bottom formed by folding inwardly wall parts in the form of foldable flaps and being reinforced by means of covering sheets - Google Patents

Bag with bottom formed by folding inwardly wall parts in the form of foldable flaps and being reinforced by means of covering sheets Download PDF

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Publication number
EP0285940A2
EP0285940A2 EP88104908A EP88104908A EP0285940A2 EP 0285940 A2 EP0285940 A2 EP 0285940A2 EP 88104908 A EP88104908 A EP 88104908A EP 88104908 A EP88104908 A EP 88104908A EP 0285940 A2 EP0285940 A2 EP 0285940A2
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EP
European Patent Office
Prior art keywords
sack
cover sheet
bag
bottoms
valve
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.)
Granted
Application number
EP88104908A
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German (de)
French (fr)
Other versions
EP0285940B1 (en
EP0285940A3 (en
Inventor
Hans Peter Dipl.-Ing. Walser
Burkhard Dipl.-Ing. Lahrmann
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.)
NORDENIA INTERNATIONAL AG TE STEINFELD, BONDSREPUB
Original Assignee
NORDENIA VERPACKUNGSWERKE AG
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Publication of EP0285940A2 publication Critical patent/EP0285940A2/en
Publication of EP0285940A3 publication Critical patent/EP0285940A3/en
Application granted granted Critical
Publication of EP0285940B1 publication Critical patent/EP0285940B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/14—Valve bags, i.e. with valves for filling
    • B65D31/142—Valve bags, i.e. with valves for filling the filling port being formed by folding a flap connected to a side, e.g. block bottoms

Definitions

  • the invention relates to a sack, in particular a sack made from a flat tube section, preferably made of plastic film, with sack bottoms, preferably elongated, hexagonal sack bottoms, which are formed by folding the sack walls inwards from folding flaps and which are each reinforced with an outer cover sheet.
  • the cover sheets for reinforcing the sack bottoms are preferably glued to the sack bottom or otherwise adhere to the sack bottoms.
  • this liability of the cover sheet is often weakened by the fact that each sack bottom is formed by folding the side walls of the sack inwards, so that not always a flat sack bottom is created, but that side gussets of the sack also extend into the sack bottom region because the folding flaps also have these side folds .
  • Such side folds can be formed, for example, by relatively sharp-edged extruder edges on flat tube sections during extrusion, and these side folds then also have a sack made from the flat tube section.
  • the invention has for its object to improve a sack of the type mentioned in such a way that secure cover sheet adhesion is ensured even in the event of folds occurring in the sack bottom area.
  • At least one of the cover sheets is strip-shaped and has an extension section as an additional adhesive surface at least on one of its two ends.
  • the extension sections can be provided in a manner known per se with a coating of adhesive or the like and are thus available as additional adhesive surfaces of the cover sheet.
  • the extension sections advantageously extend essentially in the longitudinal central region of the cover sheet, under which folds occur most frequently in the bag bottom.
  • both cover sheets of the sack are designed in the manner according to the invention, but it is conceivable that the two sack bottoms of a sack are designed differently, for example because one of the sack bottoms is to serve as a storage surface, while the other sack bottom is to be closed, for example, only temporarily and essentially for Removal of the bag filling serves.
  • the extension sections can be triangular, so that the cover sheet is hexagonal in total and thus corresponds to the sack bottom shape of a sack of the type mentioned at the beginning. In this way, almost the entire bag bottom is advantageously used as a surface for the attachment of the cover sheet.
  • cover sheets are preferably manufactured continuously and are punched or cut out of material strips, for example, it is advantageous if the extension sections are tongues to which the cover sheet tapers at the end, each tongue preferably extending transversely to the longitudinal direction of the cover sheet Has end edge.
  • the tongue-shaped extension sections form a connecting web between adjacent cover sheets during the manufacture of the cover sheets until the individual cover sheets are finally cut off from the material strip, which web is severed when the individual cover sheets are cut off, the respective end edge of the cover sheet being formed. Maintaining the connection of the cover sheets during production until the last possible moment facilitates in particular the transport of these cover sheets through a production line and thus the continuous processing of the cover sheets.
  • the cover sheet is formed in one piece, and each tongue of the cover sheet is each formed by recesses made symmetrically to the longitudinal axis of the cover sheet.
  • the tongues are thus not separately attached to the cover sheet, which would require additional work steps, but the cover sheet is preferably formed from a mostly rectangular sheet of material, the corners of which are removed by recesses, so that the tongues of the cover sheet form and the cover sheet is closed tapering the tongues, and thus also on the mostly acute-angled sack bottoms without the cover sheet protruding over the sack bottom in undesired areas.
  • the recesses each have edges running in an arc, preferably hyperbolic edges, which is also particularly advantageous in the production of the cover sheet.
  • the recesses can be made continuously, for example, by rollers reinforced with cutting or punching tools, the curve of the recess edges being favorable for the rolling process of these rollers.
  • a sack is known from DE-GM 84 37 911.1 with a valve inserted between the folding flaps of at least one of the sack bottoms from a flat-folded valve hose, to which an insertion pocket is assigned, into which the valve hose end protruding over the sack bottom can be inserted after folding, whereby the cover sheet protrudes beyond the bottom of the sack and can be folded over together with the protruding valve hose end and inserted into the insertion pocket.
  • the valve tube can advantageously be pushed onto a filler neck when filling the sack. After the filling process, the end of the valve hose is folded over and inserted into the insertion pocket, so that the valve is sealed in the folding area. The end of the sack protruding from the bottom of the bag stiffens the end of the valve hose so that the end of the valve hose remains in the insert pocket and does not slip out.
  • the cover sheet section projecting beyond the bag bottom has an extension section, which can also preferably be designed as a tongue.
  • these recesses also have the advantage that the valve hose end can be grasped and folded over directly in the region of these recesses, so that an even better seal of the valve hose end is achieved and also an insertion of the valve hose end together with the cover sheet in the insert pocket is facilitated because the insertable end of the cover sheet is tapered due to the tongue.
  • a sack 1 is schematically indicated, which has a sack bottom 2.
  • the sack bottom 2 is formed by folding the sack walls inward from cross flaps 3 to 6 and reinforced with an outer cover sheet 7 applied on the outside.
  • the cover sheet 7 is glued to the folding flaps 3 to 6, for which purpose adhesive is applied to the bag bottom 2.
  • the cover sheet 7 is shown partially folded up, so that an area marked with crosses 8 can be seen under the cover sheet 7 on the bag bottom 2 to which the glued cover sheet is applied.
  • the folding flaps 3, 4 on the narrow sides of the bag bottom 2 have folds 9, 10, which are continuations of the side folds 11, 12 of the bag wall, which arise, for example, from the extruder edges of the extruder when the hose section from which the bag 1 is made is produced .
  • the folds 9, 10 run in the area of the longitudinal axis of the bag bottom 2.
  • the cover sheet 7 has at its ends, as additional adhesive surfaces, extension sections 13, which allow an enlargement of the area marked with crosses 8 and thus a better adhesion of the cover sheet 7 Ensure in the area of the folds 9, 10.
  • the extension sections 13 are designed as tongues and are delimited by recesses 14 in the cover sheet 7.
  • a section of a sack is shown, which has a sack bottom 2, which essentially corresponds to the sack bottom shown in Fig. 2, but which also has a valve 15, which consists of a flat-folded valve hose 16, from which a valve hose end the bag bottom 2 protrudes.
  • a valve 15 Arranged below the valve 15 is an insertion pocket, not recognizable in FIG. 2, into which the projecting end of the valve hose can be inserted after being folded over.
  • the cover sheet 7 reinforcing the bag bottom 2 also largely covers the projecting valve hose end with a projecting cover sheet section which, like the cover sheet 7 according to FIG. 1, has an extension section 13 designed as a tongue, which is delimited by recesses 14.
  • FIG. 3 shows a further embodiment of a cover sheet 7 in plan view.
  • the cover sheet 7 has at its two ends extension sections 13 which taper at an angle and thus form almost triangular tongues.

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

Abstract

The bag, in particular a bag made of a flat tubular portion, preferably of plastic film, has bottoms, preferably elongate, hexagonal bottoms which are formed by inwardly folding the bag walls in the form of foldable flaps and are reinforced in each case by a covering sheet applied to the outside. At least one of the covering sheets (7) is of strip-shaped construction and has an extended portion (13) at least on one of its two ends as an additional adhesive surface. A valve, consisting of a flat folded valve tubing, can also be placed between the foldable flaps of at least one the bottoms, to which valve tubing an insertion bag is assigned, into which the end of the valve tubing, projecting over the bottom, can be inserted after it has been folded over. The covering sheet projects beyond the bottom and can be folded together with the projecting end of the valve tubing and can be inserted into the insertion bag, the portion of the covering sheet projecting beyond the bottom (2) having the extended portion (13). <IMAGE>

Description

Die Erfindung betrifft einen Sack, insbesondere einen aus ei­nem platten Schlauchabschnitt, vorzugsweise aus Kunststoff­folie, gefertigten Sack, mit Sackböden, vorzugsweise läng­lichen, sechseckigen Sackböden, die durch Einwärtsfalten der Sackwände aus Faltklappen gebildet sind und die jeweils mit ei­nem außen aufgebrachten Deckblatt verstärkt sind.The invention relates to a sack, in particular a sack made from a flat tube section, preferably made of plastic film, with sack bottoms, preferably elongated, hexagonal sack bottoms, which are formed by folding the sack walls inwards from folding flaps and which are each reinforced with an outer cover sheet.

Die Deckblätter zur Verstärkung der Sackböden werden vorzugs­weise auf den Sackboden aufgeklebt oder haften auf andere Wei­se an den Sackböden. Diese Haftung des Deckblattes wird häufig jedoch dadurch geschwächt, daß jeder Sackboden durch Einwärts­falten von Seitenwänden des Sackes gebildet ist, so daß nicht immer ein ebener Sackboden entsteht, sondern daß sich Seiten­falten des Sackes auch in den Sackbodenbereich erstrecken, weil auch die Faltklappen diese Seitenfalten aufweisen. Derar­tige Seitenfalten können sich beispielsweise durch relativ scharfkantige Extruderkanten an platten Schlauchabschnitten beim Extrudieren ausbilden und diese Seitenfalten weist dann auch ein aus dem platten Schlauchabschnitt gefertigter Sack auf. Durch das Aufbringen des Deckblattes auf dem Sackboden werden diese Seitenfalten im Sackbodenbereich nicht beseitigt, sondern die Seitenfalten bilden sich immer wieder aus, wodurch das Deckblatt im Bereich dieses Seitenfaltenabschnittes, wel­cher häufig entlang der Längsachse des Sackbodens verläuft, an­gehoben wird, wobei sich in diesem Bereich die Haftung des Deckblattes am Sackboden lösen kann. Hierdurch wird der Sackbo­den in diesen Bereichen unter Umständen luftdurchlässig, was insbesondere dann unerwünscht ist, wenn in dem Sack staubför­miges Schüttgut abgefüllt ist, welches durch diese Bereiche entweichen kann.The cover sheets for reinforcing the sack bottoms are preferably glued to the sack bottom or otherwise adhere to the sack bottoms. However, this liability of the cover sheet is often weakened by the fact that each sack bottom is formed by folding the side walls of the sack inwards, so that not always a flat sack bottom is created, but that side gussets of the sack also extend into the sack bottom region because the folding flaps also have these side folds . Such side folds can be formed, for example, by relatively sharp-edged extruder edges on flat tube sections during extrusion, and these side folds then also have a sack made from the flat tube section. By applying the cover sheet to the bag bottom, these side folds in the bag bottom area are not eliminated, but the side folds form again and again, whereby the cover sheet is raised in the area of this side fold section, which often runs along the longitudinal axis of the bag bottom, in this area the liability of the Can loosen the cover sheet on the bag bottom. As a result, the bag bottom in these areas may become permeable to air, which is particularly undesirable if dust-like bulk material is filled in the bag, which can escape through these areas.

Der Erfindung liegt die Aufgabe zugrunde, einen Sack der ein­gangs genannten Gattung dahingehend zu verbessern, daß eine sichere Deckblatthaftung auch bei einem eventuellen Auftreten von Falten im Sackbodenbereich gewährleistet ist.The invention has for its object to improve a sack of the type mentioned in such a way that secure cover sheet adhesion is ensured even in the event of folds occurring in the sack bottom area.

Die Aufgabe ist erfindungsgemäß dadurch gelöst worden, daß we­nigstens eines der Deckblätter streifenförmig ausgebildet ist und wenigstens an einem seiner beiden Enden als zusätzliche Haftfläche einen Verlängerungsabschnitt aufweist.The object has been achieved according to the invention in that at least one of the cover sheets is strip-shaped and has an extension section as an additional adhesive surface at least on one of its two ends.

Die Verlängerungsabschnitte können in an sich bekannter Weise mit einer Beschichtumg aus Klebstoff oder dergleichen versehen werden und stehen somit als zusätzliche Haftflächen des Deck­blattes zur Verfügung. Mit Vorteil erstrecken sich die Verlän­gerungsabschnitte im wesentlichen im Längsmittelbereich des Deckblattes, unter dem am häufigsten Falten im Sackboden auf­treten. Vorzugsweise sind beide Deckblätter des Sackes in er­findungsgemäßer Weise ausgebildet, jedoch ist es denkbar, daß die beiden Sackböden eines Sackes unterschiedlich ausgebildet sind, weil beispielsweise einer der Sackböden als Abstell­fläche dienen soll, während der andere Sackboden beispielswei­se nur vorübergehend geschlossen werden soll und im wesent­lichen zur Entnahme der Sackfüllung dient.The extension sections can be provided in a manner known per se with a coating of adhesive or the like and are thus available as additional adhesive surfaces of the cover sheet. The extension sections advantageously extend essentially in the longitudinal central region of the cover sheet, under which folds occur most frequently in the bag bottom. Preferably, both cover sheets of the sack are designed in the manner according to the invention, but it is conceivable that the two sack bottoms of a sack are designed differently, for example because one of the sack bottoms is to serve as a storage surface, while the other sack bottom is to be closed, for example, only temporarily and essentially for Removal of the bag filling serves.

Die Verlängerungsabschnitte können dreiecksförmig ausgebildet sein, so daß das Deckblatt insgesamt sechseckig ist und damit der häufigstens Sackbodenform eines Sackes der eingangs ge­nannten Gattung entspricht. Auf diese Weise wird mit Vorteil nahezu der gesamte Sackboden als Fläche für die Anhaftung des Deckblattes genutzt. Insbesondere für die Fertigung des Deck­ blattes, bei welcher Deckblätter vorzugsweise fortlaufend ge­fertigt werden und dabei zum Beispiel aus Werkstoffstreifen ausgestanzt oder ausgeschnitten werden, ist es von Vorteil, wenn die Verlängerungsabschnitte Zungen sind, zu denen sich das Deckblatt endseitig verjüngt, wobei jede Zunge vorzugs­weise eine quer zur Längsrichtung des Deckblattes verlaufende Endkante hat. Die zungenförmigen Verlängerungsabschnitte bil­den nämlich bei der Fertigung der Deckblätter bis zum end­gültigen Abschneiden der einzelnen Deckblätter vom Werkstoff­streifen einen Verbindungssteg zwischen einander benachbarten Deckblättern, der beim Abschneiden der einzelnen Deckblätter durchtrennt wird, wobei sich die jeweilige Endkante des Deck­blattes ausbildet. Der Erhalt der Verbindung der Deckblätter bei der Fertigung bis zum letztmöglichen Augenblick er­leichtert insbesondere den Transport dieser Deckblätter durch eine Fertigungsstraße und somit die kontinuierliche Bear­beitung der Deckblätter.The extension sections can be triangular, so that the cover sheet is hexagonal in total and thus corresponds to the sack bottom shape of a sack of the type mentioned at the beginning. In this way, almost the entire bag bottom is advantageously used as a surface for the attachment of the cover sheet. Especially for the manufacture of the deck sheet, in which cover sheets are preferably manufactured continuously and are punched or cut out of material strips, for example, it is advantageous if the extension sections are tongues to which the cover sheet tapers at the end, each tongue preferably extending transversely to the longitudinal direction of the cover sheet Has end edge. The tongue-shaped extension sections form a connecting web between adjacent cover sheets during the manufacture of the cover sheets until the individual cover sheets are finally cut off from the material strip, which web is severed when the individual cover sheets are cut off, the respective end edge of the cover sheet being formed. Maintaining the connection of the cover sheets during production until the last possible moment facilitates in particular the transport of these cover sheets through a production line and thus the continuous processing of the cover sheets.

Das Deckblatt ist bei einer bevorzugten Ausbildung einstückig ausgebildet, und jede Zunge des Deckblattes ist jeweils durch symmetrisch zur Längsachse des Deckblattes eingebrachte Aus­nehmungen ausgebildet. Die Zungen sind somit nicht gesondert an das Deckblatt angesetzt, was zusätzliche Arbeitsschritte er­fordern würde, sondern das Deckblatt wird vorzugsweise aus ei­nem, meist rechteckigen Werkstoffbogen ausgebildet, dessen Ek­ken durch Ausnehmungen entfernt werden, so daß sich die Zungen des Deckblattes ausbilden und sich das Deckblatt zu den Zungen hin verjüngt, und damit auch auf den meist spitzwinkeligen Sackböden Platz findet, ohne daß das Deckblatt in unerwünsch­ten Bereichen über den Sackboden vorsteht. Die Ausnehmungen weisen bei einer bevorzugten Ausbildung jeweils in einem Bogen verlaufende Kanten vorzugsweise hyperbelförmig verlaufende Kan­ten, auf, was insbesondere auch bei der Fertigung des Deck­blattes von vorteil ist. Die Ausnehmungen können beispielswei­se fortlaufend durch mit Schneid- oder Stanzwerkzeugen bewehr­ten Walzen eingebracht werden, wobei der Bogenverlauf der Aus­nehmungskanten für den Abrollvorgang dieser Walzen günstig ist.In a preferred embodiment, the cover sheet is formed in one piece, and each tongue of the cover sheet is each formed by recesses made symmetrically to the longitudinal axis of the cover sheet. The tongues are thus not separately attached to the cover sheet, which would require additional work steps, but the cover sheet is preferably formed from a mostly rectangular sheet of material, the corners of which are removed by recesses, so that the tongues of the cover sheet form and the cover sheet is closed tapering the tongues, and thus also on the mostly acute-angled sack bottoms without the cover sheet protruding over the sack bottom in undesired areas. In a preferred embodiment, the recesses each have edges running in an arc, preferably hyperbolic edges, which is also particularly advantageous in the production of the cover sheet. The recesses can be made continuously, for example, by rollers reinforced with cutting or punching tools, the curve of the recess edges being favorable for the rolling process of these rollers.

Säcke der eingangs genannten Gattung weisen häufig über ihre Gattungsmerkmale hinaus noch weitere Merkmale auf, durch die insbesondere ein Befüllen des Sackes mit Schüttgut erleichtert wird, andererseits aber auch die Dichtigkeit des Sackes nach dem Befüllen gewährleistet bleibt. Beispielsweise ist aus dem DE-GM 84 37 911.1 ein Sack bekannt mit einem zwischen die Falt­klappen wenigstens eines der Sackböden eingelegten Ventil aus einem plattgefalteten Ventilschlauch, dem eine Einstecktasche zugeordnet ist, in die das über den Sackboden vorstehende ven­tilschlauchende nach einer Umfaltung einsteckbar ist, wobei das Deckblatt über den Sackboden hinaus vorsteht und zusammen mit dem vorstehenden Ventilschlauchende umfaltbar und in die Einstecktasche einsteckbar ist.Sacks of the type mentioned at the outset often have further features in addition to their generic features, which in particular make it easier to fill the sack with bulk material, but on the other hand the tightness of the sack remains guaranteed after filling. For example, a sack is known from DE-GM 84 37 911.1 with a valve inserted between the folding flaps of at least one of the sack bottoms from a flat-folded valve hose, to which an insertion pocket is assigned, into which the valve hose end protruding over the sack bottom can be inserted after folding, whereby the cover sheet protrudes beyond the bottom of the sack and can be folded over together with the protruding valve hose end and inserted into the insertion pocket.

Der Ventilschlauch kann beim Befüllen des Sackes in vorteilhaf­ter Weise auf einen Einfüllstutzen aufgeschoben werden. Nach dem Befüllvorgang wird das Ventilschlauchende umgefaltet und in die Einstecktasche eingesteckt, so daß das Ventil im Umfalt­bereich abgedichtet ist. Durch das über den Sackboden vor­stehende Deckblatt wird das Ventilschlauchende versteift, so daß das Ventilschlauchende in der Einstecktasche verbleibt und nicht herausrutscht.The valve tube can advantageously be pushed onto a filler neck when filling the sack. After the filling process, the end of the valve hose is folded over and inserted into the insertion pocket, so that the valve is sealed in the folding area. The end of the sack protruding from the bottom of the bag stiffens the end of the valve hose so that the end of the valve hose remains in the insert pocket and does not slip out.

Nach einer Weiterbildung der Erfindung, für die auch selb­ständiger Schutz beansprucht wird, hat der über den Sackboden hinaus vorstehende Deckblattabschnitt einen Verlängerungsab­schnitt, der auch vorzugsweise als Zunge ausgebildet sein kann. Insbesondere, wenn der Deckblattabschnitt zur Bildung des Verlängerungsabschnittes Ausnehmungen aufweist, haben die­se Ausnehmungen zudem den Vorteil, daß im Bereich dieser Aus­nehmungen unmittelbar das Ventilschlauchende erfaßt und umge­schlagen werden kann, so daß eine noch bessere Abdichtung des Ventilschlauchendes erzielt wird und außerdem ein Einschieben des Ventilschlauchendes zusammen mit dem Deckblatt in die Ein­stecktasche erleichtert wird, da das in die Einstecktasche ein­schiebbare Ende des Deckblattes aufgrund der Zunge verjüngt ist.According to a development of the invention, for which independent protection is also claimed, the cover sheet section projecting beyond the bag bottom has an extension section, which can also preferably be designed as a tongue. In particular, if the cover sheet section has recesses to form the extension section, these recesses also have the advantage that the valve hose end can be grasped and folded over directly in the region of these recesses, so that an even better seal of the valve hose end is achieved and also an insertion of the valve hose end together with the cover sheet in the insert pocket is facilitated because the insertable end of the cover sheet is tapered due to the tongue.

Ausführungsbeispiele, aus denen sich weitere erfinderische Merkmale ergeben, sind in der Zeichnung dargestellt. Es zeigen schematisch:

  • Fig. 1 den Sackboden eines Sackes mit Deckblatt in perspekti­vischer Ansicht,
  • Fig. 2 einen Sackboden mit einem Ventilschlauch in perspekti­vischer Ansicht und
  • Fig. 3 eine Draufsicht auf ein weiteres Ausführungsbeispiel eines Deckblattes.
Exemplary embodiments from which further inventive features result are shown in the drawing. They show schematically:
  • 1 is a perspective view of the sack bottom of a sack with a cover sheet,
  • Fig. 2 shows a bag bottom with a valve hose in a perspective view
  • Fig. 3 is a plan view of another embodiment of a cover sheet.

In Fig. 1 ist schematisch ein Sack 1 angedeutet, der einen Sackboden 2 aufweist. Der Sackboden 2 ist durch kreuzweises Einwärtsfalten der Sackwände aus Faltklappen 3 bis 6 gebildet und mit einem außen aufgebrachten Deckblatt 7 verstärkt. Das Deckblatt 7 ist auf die Faltklappen 3 bis 6 aufgeklebt, wozu Klebstoff auf den Sackboden 2 aufgetragen ist. Das Deckblatt 7 ist zum Teil hochgeklappt dargestellt, so daß unter dem Deck­blatt 7 auf dem Sackboden 2 ein mit Kreuzen 8 markierter Be­reich erkennbar ist, auf den das beleimte Deckblatt aufge­bracht wird.In Fig. 1, a sack 1 is schematically indicated, which has a sack bottom 2. The sack bottom 2 is formed by folding the sack walls inward from cross flaps 3 to 6 and reinforced with an outer cover sheet 7 applied on the outside. The cover sheet 7 is glued to the folding flaps 3 to 6, for which purpose adhesive is applied to the bag bottom 2. The cover sheet 7 is shown partially folded up, so that an area marked with crosses 8 can be seen under the cover sheet 7 on the bag bottom 2 to which the glued cover sheet is applied.

Die Faltklappen 3, 4 an den Schmalseiten des Sackbodens 2 wei­sen Falten 9, 10 auf, welche Fortsetzungen der Seitenfalten 11, 12 der Sackwandung sind, die beim Fertigen des Schlauchab­schnittes, aus welchem der Sack 1 gefertigt ist, beispielswei­se durch die Extruderkanten des Extruders entstehen.The folding flaps 3, 4 on the narrow sides of the bag bottom 2 have folds 9, 10, which are continuations of the side folds 11, 12 of the bag wall, which arise, for example, from the extruder edges of the extruder when the hose section from which the bag 1 is made is produced .

Die Falten 9, 10 verlaufen im Bereich der Längsachse des Sack­bodens 2. In diesem Bereich weist das Deckblatt 7 an seinen En­den jeweils als zusätzliche Haftflächen Verlängerungsabschnit­te 13 auf, die eine Vergrößerung des mit Kreuzen 8 gekennzeich­neten Bereichs erlauben und somit eine bessere Haftung des Deckblattes 7 im Bereich der Falten 9, 10 gewährleisten. Die Verlängerungsabschnitte 13 sind als Zungen ausgebildet und wer­den von Ausnehmungen 14 des Deckblattes 7 begrenzt.The folds 9, 10 run in the area of the longitudinal axis of the bag bottom 2. In this area, the cover sheet 7 has at its ends, as additional adhesive surfaces, extension sections 13, which allow an enlargement of the area marked with crosses 8 and thus a better adhesion of the cover sheet 7 Ensure in the area of the folds 9, 10. The extension sections 13 are designed as tongues and are delimited by recesses 14 in the cover sheet 7.

In Fig. 2 ist ein Ausschnitt eines Sackes dargestellt, der ei­nen Sackboden 2 aufweist, der im wesentlichen dem in Fig. 2 dargestellten Sackboden entspricht, der aber zusätzlich ein Ventil 15 aufweist, welches aus einem plattgefalteten Ventil­schlauch 16 besteht, von dem ein Ventilschlauchende über den Sackboden 2 vorsteht. Unterhalb des Ventiles 15 ist eine in der Fig. 2 nicht erkennbare Einstecktasche angeordnet, in die das vorstehende Ventilschlauchende nach einer Umfaltung ein­steckbar ist.In Fig. 2 a section of a sack is shown, which has a sack bottom 2, which essentially corresponds to the sack bottom shown in Fig. 2, but which also has a valve 15, which consists of a flat-folded valve hose 16, from which a valve hose end the bag bottom 2 protrudes. Arranged below the valve 15 is an insertion pocket, not recognizable in FIG. 2, into which the projecting end of the valve hose can be inserted after being folded over.

Das den Sackboden 2 verstärkende Deckblatt 7 überdeckt auch zum größten Teil das vorstehende Ventilschlauchende mit einem vorstehenden Deckblattabschnitt, der wie das Deckblatt 7 gemäß Fig. 1 einen als Zunge ausgebildeten Verlängerungsabschnitt 13 aufweist, welcher von Ausnehmungen 14 begrenzt ist.The cover sheet 7 reinforcing the bag bottom 2 also largely covers the projecting valve hose end with a projecting cover sheet section which, like the cover sheet 7 according to FIG. 1, has an extension section 13 designed as a tongue, which is delimited by recesses 14.

In der Fig. 3 ist ein weiteres Ausführungsbeispiel eines Deck­blattes 7 in der Draufsicht dargestellt.3 shows a further embodiment of a cover sheet 7 in plan view.

Das Deckblatt 7 weist an seinen beiden Enden Verlängerungsab­schnitte 13 auf, die sich winkelig verjüngen, und somit nahezu dreiecksförmige Zungen bilden. Die Verlängerungsabschnitte 13 enden jedoch aus fertigungstechnischen Gründen in quer zu der Längsachse des Deckblattes 7 verlaufenden geraden Endkanten. Im Bereich dieser Endkanten weisen die Verlängerungsabschnitte 13 vorstehende, stegförmige Laschen 17 auf.The cover sheet 7 has at its two ends extension sections 13 which taper at an angle and thus form almost triangular tongues. The extension sections 13, however, end in production-technical reasons in straight end edges running transversely to the longitudinal axis of the cover sheet 7. In the area of these end edges, the extension sections 13 have projecting, web-shaped tabs 17.

Claims (8)

1. Sack, insbesondere ein aus einem platten Schlauchabschnitt, vorzugsweise aus Kunststoffolie, gefertigter Sack, mit Sack­böden, vorzugsweise länglichen, sechseckigen Sackböden, die durch Einwärtsfalten der Sackwände aus Faltklappen gebildet sind und die jeweils mit einem außen aufgebrachten Deckblatt verstärkt sind,
dadurch gekennzeichnet,
daß wenigstens eines der Deckblätter (7) streifenförmig ausge­bildet ist und wenigstens an einem seiner beiden Enden als zu­sätzliche Haftfläche einen Verlängerungsabschnitt (13) auf­weist.1. Sack, in particular a sack made from a flat tube section, preferably made of plastic film, with sack bottoms, preferably elongated, hexagonal sack bottoms, which are formed by folding the sack walls inwards from folding flaps and which are each reinforced with an outer cover sheet,
characterized,
that at least one of the cover sheets (7) is strip-shaped and has at least at one of its two ends an extension section (13) as an additional adhesive surface. 2. Sack nach Anspruch 1, dadurch gekennzeichnet, daß die verlän­gerungsabschnitte (13) dreiecksförmig ausgebildet sind und daß das Deckblatt (7) insgesamt sechseckig ist.2. Sack according to claim 1, characterized in that the extension sections (13) are triangular and that the cover sheet (7) is hexagonal in total. 3. Sack nach Anspruch 1, dadurch gekennzeichnet, daß die Verlän­gerungsabschnitte (13) Zungen sind, zu denen sich das Deck­blatt (7) endseitig verjüngt.3. Sack according to claim 1, characterized in that the extension sections (13) are tongues to which the cover sheet (7) tapers at the end. 4. Sack nach Anspruch 3, dadurch gekennzeichnet, daß jede Zunge eine quer zur Längsrichtung des Deckblattes (7) verlaufende Endkante hat.4. Sack according to claim 3, characterized in that each tongue has an end edge extending transversely to the longitudinal direction of the cover sheet (7). 5. Sack nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß das Deckblatt (7) einstückig ausgebildet ist und daß jede Zunge je­weils durch symmetrisch zur Längsachse des Deckblattes (7) ein­gebrachte Ausnehmungen (14) ausgebildet ist.5. Sack according to claim 3 or 4, characterized in that the cover sheet (7) is formed in one piece and that each tongue is formed by recesses (14) made symmetrically to the longitudinal axis of the cover sheet (7). 6. Sack nach Anspruch 5, dadurch gekennzeichnet, daß jede Ausneh­mung (14) jeweils in einem Bogen verlaufende Kanten aufweist.6. Sack according to claim 5, characterized in that each recess (14) has edges running in an arc. 7. Sack nach Anspruch 6, dadurch gekennzeichnet, daß die Kanten jeder Ausnehmung (14) etwa hyperbelförmig verlaufen.7. Sack according to claim 6, characterized in that the edges of each recess (14) are approximately hyperbolic. 8. Sack mit einem zwischen die Faltklappen wenigstens eines der Sackböden eingelegten Ventil aus einem plattgefalteten Ventil­ schlauch, dem eine Einstecktasche zugeordnet ist, in die das über den Sackboden vorstehende Ventilschlauchende nach einer Umfaltung einsteckbar ist, wobei das Deckblatt über den Sack­boden hinaus vorsteht und zusammen mit dem vorstehenden Ventil­schlauchende umfaltbar und in die Einstecktasche einsteckbar ist, insbesondere nach einem der vorhergehenden Ansprüche, da­durch gekennzeichnet, daß der über den Sackboden (2) hinaus vorstehende Deckblattabschnitt einen Verlängerungsabschnitt (13) hat.8. Sack with a valve inserted between the folding flaps of at least one of the sack bottoms from a flat-folded valve Hose to which an insertion pocket is assigned, into which the valve hose end protruding over the sack bottom can be inserted after a folding, the cover sheet protruding beyond the sack bottom and being foldable together with the projecting valve hose end and insertable into the insertion pocket, in particular according to one of the preceding claims , characterized in that the cover sheet section projecting beyond the bag bottom (2) has an extension section (13).
EP88104908A 1987-04-08 1988-03-26 Bag with bottom formed by folding inwardly wall parts in the form of foldable flaps and being reinforced by means of covering sheets Expired - Lifetime EP0285940B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8705223U 1987-04-08
DE8705223U DE8705223U1 (en) 1987-04-08 1987-04-08

Publications (3)

Publication Number Publication Date
EP0285940A2 true EP0285940A2 (en) 1988-10-12
EP0285940A3 EP0285940A3 (en) 1989-09-20
EP0285940B1 EP0285940B1 (en) 1993-03-10

Family

ID=6806846

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Application Number Title Priority Date Filing Date
EP88104908A Expired - Lifetime EP0285940B1 (en) 1987-04-08 1988-03-26 Bag with bottom formed by folding inwardly wall parts in the form of foldable flaps and being reinforced by means of covering sheets

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EP (1) EP0285940B1 (en)
DE (2) DE8705223U1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0976539A1 (en) 1998-07-28 2000-02-02 Flexico-France Method and machine for preparing flat-bottom bags
DE202009007915U1 (en) 2009-06-05 2009-08-20 Worff, Herwig, Dipl.-Ing. bag
US20190352054A1 (en) * 2016-06-23 2019-11-21 Starlinger & Co Gesellschaft M.B.H. Bag or sack-like packaging
US11524815B2 (en) * 2017-12-14 2022-12-13 Starlinger & Co Gesellschaft M.B.H. Bag for loose material

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3941300A1 (en) * 1989-12-14 1991-06-20 Nordenia Verpackung Sack made of folded plastics - has surface giving different degrees of adherence to covering sheet at end

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1486470A1 (en) * 1964-04-03 1969-06-04 Lissner & Co Geb Sack made of plastic film with a cross base
DE1922826A1 (en) * 1969-05-05 1970-12-10 Windmoeller & Hoelscher Sack made from plastic film as well as method and device for its production
DE2323726A1 (en) * 1973-05-10 1974-11-21 Windmoeller & Hoelscher CROSS-BOTTOM BAG
DE3336731A1 (en) * 1983-10-08 1985-04-25 Nordenia Kunststoffwerke Peter Mager KG, 2841 Steinfeld Sack, preferably made of plastic film, in particular sack with valve
DE3508115A1 (en) * 1985-03-07 1986-09-11 Nordenia Kunststoffe Peter Mager KG, 2841 Steinfeld Sack having a folding bottom and having a filling aperture located in the region of the folding bottom

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1486470A1 (en) * 1964-04-03 1969-06-04 Lissner & Co Geb Sack made of plastic film with a cross base
DE1922826A1 (en) * 1969-05-05 1970-12-10 Windmoeller & Hoelscher Sack made from plastic film as well as method and device for its production
DE2323726A1 (en) * 1973-05-10 1974-11-21 Windmoeller & Hoelscher CROSS-BOTTOM BAG
DE3336731A1 (en) * 1983-10-08 1985-04-25 Nordenia Kunststoffwerke Peter Mager KG, 2841 Steinfeld Sack, preferably made of plastic film, in particular sack with valve
DE3508115A1 (en) * 1985-03-07 1986-09-11 Nordenia Kunststoffe Peter Mager KG, 2841 Steinfeld Sack having a folding bottom and having a filling aperture located in the region of the folding bottom

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0976539A1 (en) 1998-07-28 2000-02-02 Flexico-France Method and machine for preparing flat-bottom bags
DE202009007915U1 (en) 2009-06-05 2009-08-20 Worff, Herwig, Dipl.-Ing. bag
US20190352054A1 (en) * 2016-06-23 2019-11-21 Starlinger & Co Gesellschaft M.B.H. Bag or sack-like packaging
US11524815B2 (en) * 2017-12-14 2022-12-13 Starlinger & Co Gesellschaft M.B.H. Bag for loose material

Also Published As

Publication number Publication date
DE8705223U1 (en) 1987-09-03
EP0285940B1 (en) 1993-03-10
EP0285940A3 (en) 1989-09-20
DE3878955D1 (en) 1993-04-15

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