EP0004396B1 - Bag provided with a valve in the bottom - Google Patents

Bag provided with a valve in the bottom Download PDF

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Publication number
EP0004396B1
EP0004396B1 EP19790200112 EP79200112A EP0004396B1 EP 0004396 B1 EP0004396 B1 EP 0004396B1 EP 19790200112 EP19790200112 EP 19790200112 EP 79200112 A EP79200112 A EP 79200112A EP 0004396 B1 EP0004396 B1 EP 0004396B1
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EP
European Patent Office
Prior art keywords
valve
bag according
magnetic
bottom valve
valve bag
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
EP19790200112
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German (de)
French (fr)
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EP0004396A2 (en
EP0004396A3 (en
Inventor
Hasso Müller
Reiner Schimanski
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.)
Walter Duerbeck Papiersackfabriken KG
Original Assignee
Walter Duerbeck Papiersackfabriken KG
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Publication date
Application filed by Walter Duerbeck Papiersackfabriken KG filed Critical Walter Duerbeck Papiersackfabriken KG
Publication of EP0004396A2 publication Critical patent/EP0004396A2/en
Publication of EP0004396A3 publication Critical patent/EP0004396A3/en
Application granted granted Critical
Publication of EP0004396B1 publication Critical patent/EP0004396B1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • 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
    • B65D2313/00—Connecting or fastening means
    • B65D2313/04—Connecting or fastening means of magnetic type

Definitions

  • the invention relates to a bottom valve sack with a tubular inner or outer valve attached to the filling opening in the bottom, in particular a cross bottom, optionally with an outer sheet covering the bottom.
  • valve bags are mainly used for filling granular and dusty goods. For this purpose, they are pushed with the valve opening over the nozzle of a filling machine, whereupon - usually under control by weighing - the contents e.g. by means of vibrating troughs, conveyor belts or the like. fed and filled into the sack. A vibrator can be used to compress the contents inside the sack.
  • Conventional sacks have been designed with one or more layers; For example, DE-AS 18 02 854 describes combination sacks with an inner flat sack, usually made of plastic film, which is placed in a cross-bottom sack, which may consist of several layers of paper, and is connected to it in the valve area.
  • valve bags of this type often meet the requirements placed on them in use, there are applications where an even faster and safer sealing of the filling valve is indispensable in order to reliably prevent even small residual quantities from passing through when being removed from the filling machine and especially afterwards.
  • a high level of tightness has already been achieved by folding over an outer sleeve, this had to be done by hand, which is prohibitively expensive due to the disproportionately high personnel costs.
  • the present invention therefore has the aim, while overcoming the prior art, using simple, economical means to substantially improve a floor valve sack of the type mentioned above beyond the properties already achieved, and in particular to prevent material losses due to leakage when the valve is leaky, particularly when it is handled Significantly record quantities, but can also have a major impact on the cleanliness of work areas and transport routes.
  • the invention provides that the valve has a magnetic closure.
  • This new measure ensures, in a surprisingly simple manner, that the valve closes automatically and automatically remains closed when it is removed from the nozzle of the filling machine, as long as no targeted action releases the magnetic closure.
  • it can be arranged at one end of the valve; if this is the inner end, it is at the same time prevented that residues of filling material get into the front or outer part of the valve.
  • such a magnetic closure can be attached with a mounting strip containing it, which is integrally connected to the valve. It is also possible and provided according to the invention that the magnetic closure has at least one sealable or self-adhesive surface with which it can be attached to the valve.
  • the magnetic closure has at least one strip of permanent magnetic flat material.
  • a strip of magnetizable flat material such as soft iron sheet, plastic containing iron oxide or iron powder or a comparable material can be arranged because the adhesive force is sufficient in many cases if the magnetic force flow from a strip closes in the counterstrip containing iron or iron oxide.
  • an increased adhesive force is achieved in the context of the invention by means of oppositely polarized magnetic closure strips.
  • a specialization of the invention is that the strips are enclosed by the valve material and / or an attachment strip, for example made of plastic film or by insert pockets.
  • This design is structurally simple and easy to manufacture. The attachment of the magnetic fastener strips is greatly facilitated.
  • Another proposal is that a plastic tape is placed on the inner end of the valve and, covering the magnetic closure strip or strips, is welded or glued to the edges of the valve, whereby the strip or strips is or are held captive.
  • the end piece e.g. of a valve is folded back outwards and is welded or glued to the valve in front of the magnetic closure strip (s). It is therefore sufficient to turn the inner edge of the valve inside out in the manner of a sleeve and to seal it, including the magnetic closure strip or strips.
  • the magnetic closure is arranged obliquely or curved to the axis of the valve. While in a preferred embodiment of the invention the magnetic closure runs transversely to the filling direction of the valve and thus over the shortest distance, it can be important for some applications to distribute the welding process over a longer trigger travel and to make it less abrupt.
  • a particularly high adhesive force is achieved if, according to another training, the Invention of the magnetic closure on the valve, in particular at its inner end, forms a double or multiple closure or a cross arrangement.
  • the magnetic closure can be made to have magnetic adhesive elements at least in places or at points, optionally in addition to or in front of continuous strips. It is achieved with very little effort that a securing of the closing action is installed at critical points.
  • the magnetic closure strips e.g. have the same spacing and / or crossed individual threads, strands or the like.
  • magnetic closure strips can also be used which consist of a large number of line and / or point elements in a suitable pattern.
  • An overlapping and / or offset arrangement is preferably used so that an overall continuous, reinforced shut-off effect is achieved transversely or obliquely to the axis of the valve.
  • the valve consists of an at least partially magnetic or magnetizable material, possibly a composite material, so that uniform material can be used which only needs to be subjected to a treatment in order to be useful for a bottom valve bag according to the invention .
  • the bottom valve sack 10 illustrated in FIG. 1 has side parts 12 to which a cross bottom 14 with corner inserts 18 connects.
  • a valve 20 is glued into the cross bottom 14, which consists of a hose section e.g. consists of plastic film and has a magnetic closure 24 at its inner end 22.
  • An outer sheet (not shown in FIGS. 1 and 2) can be placed on the underside of the base.
  • FIG. 2 shows the cross bottom 14 of such a bottom valve sack 10 before completion. It can be seen that one of the two side flaps 16 has not yet been knocked in, which at least largely covers the valve 20 on the finished floor and, after folding around a (dashed) edge, can in turn be covered by an outer sheet (40, FIG. 3); the upper flap 16 is still angled in Fig. 2.
  • the structure of the finished bottom valve bag 10 can be seen from the sectional view of FIG. 3. It can be seen in particular that the magnetic closure 24 can consist of permanent magnetic strips 26 which cover the full width of the valve 20.
  • the magnetic strip 26 can consist of permanent magnetic material, while the strip 28 opposite it can consist of a magnetizable material as a magnetic armature, for example soft iron sheet, plastic containing iron oxide or iron powder or the like.
  • the magnetic strips 26 and 28 can be dimensioned in this way be them. connect with the narrow sides to each other with a gap or toast without gaps.
  • FIG. 6 Another embodiment is shown in Fig. 6.
  • the valve 20 shown there is provided with a magnetic closure 24 which, starting from an inner end piece 22, has attachment strips 34 on both sides which hold the magnetic adhesive elements with an all-round weld seam 36 or an adhesive connection.
  • the latter consist of curved permanent-magnetic strips 26, which can be opposed to the same or merely magnetizable anchor strips 28 on the back.
  • adhesion points 38 here, which ensure an additional adhesive force in the middle of the valve 20.
  • the valve 20 which consists for example of a section of a plastic film tube, can have or form insert pockets, in particular at its inner end 22 (not shown), into which the magnetic elements 26, 28 and possibly 38 can be inserted before or after the valve 20 is glued into the bottom 14.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Magnetically Actuated Valves (AREA)

Description

Die Erfindung betrifft einen Bodenventilsack mit einem in dem Boden, insbesondere einem Kreuzboden, an der Einfüllöffnung stoffschlüssig angebrachten schlauchförmigen' Innenoder Außenventil, gegebenenfalls mit einem den Boden überdeckenden Außenblatt.The invention relates to a bottom valve sack with a tubular inner or outer valve attached to the filling opening in the bottom, in particular a cross bottom, optionally with an outer sheet covering the bottom.

Solche Ventilsäcke finden vor allem für die Abfüllung körniger und staubförmiger Güter Verwendung. Hierzu werden sie mit der Ventilöffnung über den Stutzen einer Füllmaschine geschoben, worauf - gewöhnlich unter Kontrolle durch Wägung - das Füllgut z.B. mittels Vibrationsrinnen, Förderbändern o.dgl. zugeführt und in den Sack abgefüllt wird. Dabei kann eine Rüttelvorrichtung eingesetzt werden, um das Füllgut im Sackinneren zu verdichten. Herkömmliche Säcke sind ein- und mehrlagig ausgebildet worden; beispielsweise beschreibt die DE-AS 18 02 854 Kombinationssäcke mit einem inneren, meist aus Kunststoffolie bestehenden Flachsack, der in einem gegebenenfalls aus mehreren Papierlagen bestehenden Kreuzboden-Umsack steckt und mit diesem im Ventilbereich verbunden ist.Such valve bags are mainly used for filling granular and dusty goods. For this purpose, they are pushed with the valve opening over the nozzle of a filling machine, whereupon - usually under control by weighing - the contents e.g. by means of vibrating troughs, conveyor belts or the like. fed and filled into the sack. A vibrator can be used to compress the contents inside the sack. Conventional sacks have been designed with one or more layers; For example, DE-AS 18 02 854 describes combination sacks with an inner flat sack, usually made of plastic film, which is placed in a cross-bottom sack, which may consist of several layers of paper, and is connected to it in the valve area.

Während derartige Ventilsäcke im Gebrauch vielfach den an sie gestellten Anforderungen genügen, gibt es doch Anwendungsfälle, wo ein noch schnelleres und sichereres Abdichten des Füllventils unerläßlich ist, um beim Abzug von der Füllmaschine und vor allem danach das Hindurchtreten auch kleiner Restmengen zuverlässig zu verhindern. Zwar hat man eine hohe Dichtigkeit schon durch Umfalten einer Außenmanschette erreicht, doch mußte dies von Hand gemacht werden, was wegen unverhältnismäßig hohen Personalkosten untragbar teuer ist.While valve bags of this type often meet the requirements placed on them in use, there are applications where an even faster and safer sealing of the filling valve is indispensable in order to reliably prevent even small residual quantities from passing through when being removed from the filling machine and especially afterwards. Although a high level of tightness has already been achieved by folding over an outer sleeve, this had to be done by hand, which is prohibitively expensive due to the disproportionately high personnel costs.

Die vorliegende Erfindung hat daher das Ziel, unter Überwindung des Standes der Technik mit einfachen, wirtschaftlichen Mitteln einen Bodenventilsack der eingangs genannten Art über die bereits erreichten Eigenschaften hinaus wesentlich zu verbessern und insbesondere Materialverluste durch Auslaufen bei undichtem Ventil zu verhindern, die namentlich beim Umschlag großer Mengen merklich zu Buch schlagen, aber auch die Sauberkeit von Arbeitsbereichen und Transportwegen stark beeinträchtigen können.The present invention therefore has the aim, while overcoming the prior art, using simple, economical means to substantially improve a floor valve sack of the type mentioned above beyond the properties already achieved, and in particular to prevent material losses due to leakage when the valve is leaky, particularly when it is handled Significantly record quantities, but can also have a major impact on the cleanliness of work areas and transport routes.

Zur Lösung dieser Aufgabe sieht die Erfindung vor, daß das Ventil einen Magnetverschluß aufweist. Diese neuartige Maßnahme gewährleistet auf überraschend einfache Weise, daß das Ventil beim Abzug von dem Stutzen der Füllmaschine sofort selbständig schließt und geschlossen bleibt, solange nicht gezielte Einwirkung den Magnetverschluß löst. Er kann nach einer bevorzugten Ausgestaltung der Erfindung an einem Ende des Ventils angeordnet sein; ist dies das innere Ende, so wird zugleich verhindert, daß Füllgutreste noch bis in den vorderen oder äußeren Teil des Ventils gelangen.To achieve this object, the invention provides that the valve has a magnetic closure. This new measure ensures, in a surprisingly simple manner, that the valve closes automatically and automatically remains closed when it is removed from the nozzle of the filling machine, as long as no targeted action releases the magnetic closure. According to a preferred embodiment of the invention, it can be arranged at one end of the valve; if this is the inner end, it is at the same time prevented that residues of filling material get into the front or outer part of the valve.

Die Anbringung eines solchen Magnetverschlusses kann nach einer Weiterbildung der Erfindung mit einem ihn enthaltenden Aufsetzstreifen erfolgen, der stoffschlüssig mit dem Ventil verbunden ist. Auch ist es möglich und erfindungsgemäß vorgesehen, daß der Magnetverschluß wenigstens eine siegelfähige oder selbsthaftende Fläche aufweist, mit der er an dem Ventil befestigbar ist.According to a development of the invention, such a magnetic closure can be attached with a mounting strip containing it, which is integrally connected to the valve. It is also possible and provided according to the invention that the magnetic closure has at least one sealable or self-adhesive surface with which it can be attached to the valve.

In konstruktiver Hinsicht ist es günstig, wenn der Magnetverschluß wenigstens einen Streifen aus dauermagnetischem Flachmaterial aufweist. Diesem gegenüber kann ein Streifen aus magnetisierbarem Flachmaterial wie Weicheisenblech, eisenoxid- oder eisenpulverhaltigem Kunststoff oder einem vergleichbaren Material angeordnet sein, weil die Haftkraft in vielen Fällen ausreicht, wenn der von einem Streifen ausgehende magnetische Kraftfluß sich in dem eisen- bzw. eisenoxidhaltigen Gegenstreifen schließt. In anderen Fällen erzielt man im Rahmen der Erfindung eine erhöhte Haftkraft durch entgegengesetzt polarisierte Magnetverschlußstreifen.From a design point of view, it is favorable if the magnetic closure has at least one strip of permanent magnetic flat material. In contrast, a strip of magnetizable flat material such as soft iron sheet, plastic containing iron oxide or iron powder or a comparable material can be arranged because the adhesive force is sufficient in many cases if the magnetic force flow from a strip closes in the counterstrip containing iron or iron oxide. In other cases, an increased adhesive force is achieved in the context of the invention by means of oppositely polarized magnetic closure strips.

Eine Spezialisierung der Erfindung besteht darin, daß die Streifen von dem Ventilmaterial und/oder einem Aufsetzstreifen umschlossen sind, beispielsweise aus Kunststoffolie oder durch Einstecktaschen. Diese Gestaltung ist konstruktiv einfach und fertigungstechnisch unschwer durchzuführen. Das Anbringen der Magnetverschlußstreifen wird dadurch stark erleichtert.A specialization of the invention is that the strips are enclosed by the valve material and / or an attachment strip, for example made of plastic film or by insert pockets. This design is structurally simple and easy to manufacture. The attachment of the magnetic fastener strips is greatly facilitated.

Ein anderer Vorschlag besteht darin, daß auf das innere Endstück des Ventils ein Kunststoffolieband aufgesetzt und, den bzw. die Magnetverschlußstreifen überdeckend, an seinen Rändern mit dem Ventil verschweißt oder verklebt ist, wodurch der bzw. die Streifen unverlierbar gehaltert ist bzw. sind. In der Herstellung ist es hierbei vorteilhaft, wenn das Endstück z.B. eines Ventils nach außen zurückgefaltet und vor dem bzw. den Magnetverschlußstreifen mit dem Ventil verschweißt oder verklebt ist. Daher reicht es aus, den Innenrand des Ventils nach Art einer Manschette umzustülpen und unter Einschluß des bzw. der Magnetverschlußstreifen zu versiegeln.Another proposal is that a plastic tape is placed on the inner end of the valve and, covering the magnetic closure strip or strips, is welded or glued to the edges of the valve, whereby the strip or strips is or are held captive. In production, it is advantageous if the end piece e.g. of a valve is folded back outwards and is welded or glued to the valve in front of the magnetic closure strip (s). It is therefore sufficient to turn the inner edge of the valve inside out in the manner of a sleeve and to seal it, including the magnetic closure strip or strips.

Eine weitere Ausgestaltung der Erfindung sieht vor, daß der Magnetverschluß schräg oder gekrümmt zur Achse des Ventils angeordnet ist. Während bei einer bevorzugten Ausführungsform der Erfindung der Magnetverschluß quer zur Füllrichtung des Ventils und damit auf kürzester Strecke verläuft, kann es für manche Anwendungsfälle wichtig sein, den Schleißvorgang auf einen längeren Abzugsweg zu verteilen und weniger abrupt zu gestalten.Another embodiment of the invention provides that the magnetic closure is arranged obliquely or curved to the axis of the valve. While in a preferred embodiment of the invention the magnetic closure runs transversely to the filling direction of the valve and thus over the shortest distance, it can be important for some applications to distribute the welding process over a longer trigger travel and to make it less abrupt.

Eine besonders hohe Haftkraft erzielt man, wenn nach einer anderen Weiterbildung der Erfindung der Magnetverschluß am Ventil, insbesondere an seinem inneren Ende, einen Doppeloder Mehrfachverschluß oder eine Kreuzanordnung bildet. Wahlweise kann stattdessen oder außerdem vorgesehen sein, daß der Magnetverschluß zumindest stellen- oder punktweise Magnethaftelemente aufweist, gegebenenfalls zusätzlich neben bzw. vor durchgehenden Streifen. Man erreicht dadurch mit sehr geringem Aufwand, daß an kritischen Stellen eine Sicherung der Schließwirkung eingebaut wird.A particularly high adhesive force is achieved if, according to another training, the Invention of the magnetic closure on the valve, in particular at its inner end, forms a double or multiple closure or a cross arrangement. Alternatively or in addition, provision can be made for the magnetic closure to have magnetic adhesive elements at least in places or at points, optionally in addition to or in front of continuous strips. It is achieved with very little effort that a securing of the closing action is installed at critical points.

Noch eine andere Ausgestaltung der Erfindung besteht darin, daß die Magnetverschlußstreifen z.B. abstandsgleich und/oder gekreuzt verlaufende Einzelfäden, Stränge o. dgl. aufweisen. Statt eines vorzugsweise eingesetzten Flachmaterials im wesentlichen homogener Zusammensetzung lassen sich also auch Magnetverschlußstreifen verwenden, die aus einer Vielzahl von Linien- und/oder Punktelementen in geeigneter Musterung bestehen. Bevorzugt wird eine überlappende und/oder versetzte Anordnung benutzt, so daß quer oder schräg zur Achse des Ventils eine insgesamt durchgehende, verstärkte Absperrwirkung erzielt wird.Yet another embodiment of the invention is that the magnetic closure strips e.g. have the same spacing and / or crossed individual threads, strands or the like. Instead of a flat material of essentially homogeneous composition, which is preferably used, magnetic closure strips can also be used which consist of a large number of line and / or point elements in a suitable pattern. An overlapping and / or offset arrangement is preferably used so that an overall continuous, reinforced shut-off effect is achieved transversely or obliquely to the axis of the valve.

Ferner kann nach der Erfindung vorgesehen sein, daß das Ventil aus einem zumindest bereichweise magnetischen oder magnetisierbarem Werkstoff besteht, gegebenenfalls einem Verbundwerkstoff, so daß einheitliches Material verwendet werden kann, das nur einer Behandlung unterzogen zu werden braucht, um für einen erfindungsgemäßen Bodenventilsack dienlich zu sein.Furthermore, according to the invention it can be provided that the valve consists of an at least partially magnetic or magnetizable material, possibly a composite material, so that uniform material can be used which only needs to be subjected to a treatment in order to be useful for a bottom valve bag according to the invention .

Weitere Merkmale, Einzelheiten und Vorteile der Erfindung ergeben sich aus der folgenden Beschreibung von Ausführungsbeispielen anhand der Zeichnung. Darin zeigen:

  • Fig. 1 eine Teilschrägansicht eines erfindungsgemäßen Bodenventilsackes,
  • Fig. 2 eine Draufsicht auf den Ventilboden eines erfindungsgemäßen Sackes,
  • Fig. 3 einen Querschnitt durch einen ungeöffneten Bodenventilsack nach der Erfindung,
  • Fig. 4 eine Schrägansicht des Ventils eines erfindungsgemäßen Bodenventilsackes,
  • Fig. 5 eine Draufsicht auf ein aufgeklapptes Ventil und
  • Fig. 6 eine. Seitenansicht eines anderen Ventils für einen erfindungsgemäßen Bodenventilsack.
Further features, details and advantages of the invention result from the following description of exemplary embodiments with reference to the drawing. In it show:
  • 1 is a partial oblique view of a bottom valve bag according to the invention,
  • 2 is a plan view of the valve bottom of a sack according to the invention,
  • 3 shows a cross section through an unopened bottom valve sack according to the invention,
  • 4 is an oblique view of the valve of a bottom valve bag according to the invention,
  • Fig. 5 is a plan view of an open valve and
  • Fig. 6 a. Side view of another valve for a bottom valve bag according to the invention.

Der in Fig. 1 veranschaulichte Bodenventilsack 10 hat Seitenteile 12, an die ein Kreuzboden 14 mit Eckeinschlägen 18 anschließt. In den Kreuzboden 14 ist ein Ventil 20 eingeklebt, das aus einem Schlauchabschnitt z.B. aus Kunststoffolie besteht und an seinem inneren Ende 22 einen Magnetverschluß 24 aufweist. An der Unterseite des Bodens kann ein (in Fig. 1 und 2 nicht gezeichnetes) Außenblatt aufgesetzt sein.The bottom valve sack 10 illustrated in FIG. 1 has side parts 12 to which a cross bottom 14 with corner inserts 18 connects. A valve 20 is glued into the cross bottom 14, which consists of a hose section e.g. consists of plastic film and has a magnetic closure 24 at its inner end 22. An outer sheet (not shown in FIGS. 1 and 2) can be placed on the underside of the base.

Die Draufsicht von Fig. 2 zeigt den Kreuzboden 14 eines solchen Bodenventilsackes 10 vor der Fertigstellung. Man erkennt, daß eine der beiden Seitenklappen 16 noch nicht eingeschlagen ist, welche am fertigen Boden das Ventil 20 zumindest großenteils überdecken und nach Faltung um eine (gestrichelte) Kante ihrerseits durch ein Außenblatt (40, Fig. 3) überdeckt sein können; die obere Klappe 16 steht in Fig. 2 noch winkelig ab. Aus der Schnittansicht von Fig. 3 ist der Aufbau des fertigen Bodenventilsackes 10 ersichtlich. Man sieht insbesondere, daß der Magnetverschluß 24 aus dauermagnetischen Streifen 26 bestehen kann, welche die volle Breite des Ventils 20 überstreichen.The top view of FIG. 2 shows the cross bottom 14 of such a bottom valve sack 10 before completion. It can be seen that one of the two side flaps 16 has not yet been knocked in, which at least largely covers the valve 20 on the finished floor and, after folding around a (dashed) edge, can in turn be covered by an outer sheet (40, FIG. 3); the upper flap 16 is still angled in Fig. 2. The structure of the finished bottom valve bag 10 can be seen from the sectional view of FIG. 3. It can be seen in particular that the magnetic closure 24 can consist of permanent magnetic strips 26 which cover the full width of the valve 20.

Fig. 4 und 5 deuten bei einem isoliert herausgezeichneten Ventil 20 an, daß am inneren Ende 22 eine Faltkante 30 vorhanden sein kann, um die der Rand des Ventils 20 in der Art einer Manschette nach außen zurückgeschlagen werden kann, worauf magnetische Streifen 26 und 28 eingelegt werden und die Randkante mit einer Schweißnaht 32 am Ventil 20 befestigt wird. Der magnetische Streifen 26 kann aus dauermagnetischem Material bestehen, während der ihm gegenüberliegende Streifen 28 als magnetischer Anker aus einem magnetisierbaren Werkstoff bestehen kann, beispielsweise Weicheisenblech, eisenoxid-oder eisenpulverhaltiger Kunststoff o. dgl. Die magnetischen Streifen 26 und 28 können in der Länge so bemessen sein, daß sie. mit den Schmalseiten aneinander mit einem Spalt anschließen oder spaltfrei anstoßen.4 and 5 indicate in an isolated valve 20 that there may be a folded edge 30 at the inner end 22 around which the edge of the valve 20 can be folded back in the manner of a sleeve, whereupon magnetic strips 26 and 28 be inserted and the edge is attached to the valve 20 with a weld 32. The magnetic strip 26 can consist of permanent magnetic material, while the strip 28 opposite it can consist of a magnetizable material as a magnetic armature, for example soft iron sheet, plastic containing iron oxide or iron powder or the like. The magnetic strips 26 and 28 can be dimensioned in this way be them. connect with the narrow sides to each other with a gap or toast without gaps.

Eine andere Ausführungsform ergibt sich aus Fig. 6. Das dort gezeichnete Ventil 20 ist mit einem Magnetverschluß 24 versehen, der von einem inneren Endstück 22 ausgehend beiderseits Aufsetzstreifen 34 aufweist, die mit einer Rundum-Schweißnaht 36 oder einer Klebeverbindung die magnetischen Haftelemente haltern. Im gezeichneten Ausführungsbeispiel bestehen letztere aus gekrümmten dauermagnetischen Streifen 26, denen auf der Rückseite ebensolche oder bloß magnetisierbare Ankerstreifen 28 gegenüberstehen können. Zusätzlich sind hier Haftpunkte 38 vorhanden, die in der Mitte des Ventils 20 eine zusätzliche Haftkraft gewährleisten.Another embodiment is shown in Fig. 6. The valve 20 shown there is provided with a magnetic closure 24 which, starting from an inner end piece 22, has attachment strips 34 on both sides which hold the magnetic adhesive elements with an all-round weld seam 36 or an adhesive connection. In the exemplary embodiment shown, the latter consist of curved permanent-magnetic strips 26, which can be opposed to the same or merely magnetizable anchor strips 28 on the back. In addition, there are adhesion points 38 here, which ensure an additional adhesive force in the middle of the valve 20.

Zur Halterung der magnetischen Haftelemente kann das beispielsweise aus einem Abschnitt eines Kunststoffolienschlauches bestehende Ventil 20 insbesondere an seinem inneren Ende 22 (nicht dargestellte) Einstecktaschen aufweisen oder bilden, in die sich die Magnetelemente 26, 28 und gegebenenfalls 38 einbringen lassen, bevor oder nachdem das Ventil 20 in den Boden 14 eingeklebt wird.To hold the magnetic adhesive elements, the valve 20, which consists for example of a section of a plastic film tube, can have or form insert pockets, in particular at its inner end 22 (not shown), into which the magnetic elements 26, 28 and possibly 38 can be inserted before or after the valve 20 is glued into the bottom 14.

Claims (15)

1. Bottom valve bag including a tube-shaped interior or exterior valve (20) substance-affixed to the charging aperture in the bottom which is, in particular, of the cross bottom type and which may be covered by an outer sheet (40), wherein said valve (20) comprises magnetic, closure means (24).
2. Bottom valve bag according to claim 1, wherein said magnetic closure means (24) is arranged at one end of said valve (20).
3. Bottom valve bag according to claim 1 or claim 2, wherein a surface-mounted strip that encompasses said magnetic closure means (24) is substance-affixed to said valve (20).
4. Bottom valve bag according to any one of claims 1 to 3, wherein said magnetic closure means (24) comprises at least one sealable or self-adhering face by which it is adapted to be fixed to said valve (20).
5. Bottom valve bag according to any one of claims 1 to 4, wherein said magnetic closure means (24) comprises at least one strip (26) made of a permanent magnetic web.
6. Bottom valve bag according to claim 5, wherein opposite to a strip (26) made of a permanent magnetic web there is arranged a strip (28) made of a magnetizable web such as soft- iron sheet metal, plastics containing iron oxide or iron powder, or a like material.
7. Bottom valve bag according to claim 5 or claim 6, wherein said strips (26, 28) are enclosed by the valve material and/or by a surface-mounted strip, e.g. made of plastics foil, or by sheathed pockets.
8. Bottom valve bag according to claim 7, wherein a strap of plastics foil is applied to the interior end (22) of said valve (20) and is bonded or cemented thereto by its edges such that it covers said magnetic closure strip(s) (26, 28).
9. Bottom valve bag according to claim 7, wherein the interior end (22) of said valve (20) is folded back outwardly and is bonded or cemented thereto in front of said magnetic closure strip(s) (26, 28).
10. Bottom valve bag according to any one of claims 1 to 9, wherein said magnetic closure means (24) is oblique or arcuate with respect to the axis of said valve (20).
11. Bottom valve bag according to any one of claims 1 to 10, wherein said magnetic closure means (24) forms at said valve (20), in particular at its interior end (22), a double or multiple closure or a crossed array.
12. Bottom valve bag according to any one of claims 5 to 11, wherein said magnetic closure strip(s) (26, 28) comprise(s) single filaments, strands or the like arranged in an equally spaced (parallel) or crossed pattern.
13. Bottom valve bag according to any one of claims 10 to 12, wherein the elements (26, 28, 38) of said magnetic closure means (24) are arranged transversely or at an angle to the axis of said valve (20) and/or in an overlapping manner.
14. Bottom valve bag according to any one of claims 1 to 13, wherein said magnetic closure means (24) comprises, at least at a plurality of spots or points, magnetic adhesive elements (38), preferably in addition to continuous strips (26, 28) that are adjacent or in front of them.
15. Bottom valve bag according to any one of claims 1 to 14, wherein said valve (20) is made of a material at least portions of which are magnetic or magnetizable, possibly of a compound material.
EP19790200112 1978-03-23 1979-03-06 Bag provided with a valve in the bottom Expired EP0004396B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2812782 1978-03-23
DE19782812782 DE2812782A1 (en) 1978-03-23 1978-03-23 BOTTOM VALVE BAG

Publications (3)

Publication Number Publication Date
EP0004396A2 EP0004396A2 (en) 1979-10-03
EP0004396A3 EP0004396A3 (en) 1979-10-17
EP0004396B1 true EP0004396B1 (en) 1980-10-01

Family

ID=6035314

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790200112 Expired EP0004396B1 (en) 1978-03-23 1979-03-06 Bag provided with a valve in the bottom

Country Status (3)

Country Link
EP (1) EP0004396B1 (en)
AT (1) AT362294B (en)
DE (1) DE2812782A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3108663A1 (en) * 1981-03-07 1982-10-21 Herkules Verpackungswerke Gmbh, 4401 Sendenhorst Valve sack
DE3700392A1 (en) * 1987-01-08 1988-07-21 Rosewicz Horst Dipl Chem Dr Valve for filling and automatically closing bags containing solid materials in any state
US5505305A (en) * 1992-10-21 1996-04-09 Minnesota Mining And Manufacturing Company Moisture-proof resealable pouch and container

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1809259A (en) * 1929-05-04 1931-06-09 Harrison R Williams Valve bag closure
DE842586C (en) * 1950-09-17 1952-06-30 Verpackungsbedarf G M B H Valve bag made of paper or the like.

Also Published As

Publication number Publication date
ATA186579A (en) 1980-09-15
DE2812782A1 (en) 1979-09-27
EP0004396A2 (en) 1979-10-03
AT362294B (en) 1981-04-27
EP0004396A3 (en) 1979-10-17

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