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EP1453744B1 - Packaging and sealing tool for production thereof - Google Patents

Packaging and sealing tool for production thereof Download PDF

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Publication number
EP1453744B1
EP1453744B1 EP02796631A EP02796631A EP1453744B1 EP 1453744 B1 EP1453744 B1 EP 1453744B1 EP 02796631 A EP02796631 A EP 02796631A EP 02796631 A EP02796631 A EP 02796631A EP 1453744 B1 EP1453744 B1 EP 1453744B1
Authority
EP
European Patent Office
Prior art keywords
packaging
sealing
apex
channel
region
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
Application number
EP02796631A
Other languages
German (de)
French (fr)
Other versions
EP1453744A1 (en
Inventor
Christian Fenn-Barrabass
Gerhard Rieder
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.)
Huhtamaki Ronsberg Zweigniederlassung der Huhtamaki Deutschland GmbH and Co KG
Original Assignee
Huhtamaki Ronsberg Zweigniederlassung der Huhtamaki Deutschland GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE20120253U external-priority patent/DE20120253U1/en
Application filed by Huhtamaki Ronsberg Zweigniederlassung der Huhtamaki Deutschland GmbH and Co KG filed Critical Huhtamaki Ronsberg Zweigniederlassung der Huhtamaki Deutschland GmbH and Co KG
Publication of EP1453744A1 publication Critical patent/EP1453744A1/en
Application granted granted Critical
Publication of EP1453744B1 publication Critical patent/EP1453744B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D81/00Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/34Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3446Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
    • B65D81/3461Flexible containers, e.g. bags, pouches, envelopes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10Applying or generating heat or pressure or combinations thereof
    • B65B51/14Applying or generating heat or pressure or combinations thereof by reciprocating or oscillating members
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D77/00Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22Details
    • B65D77/225Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D81/00Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/34Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3446Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
    • B65D81/3453Rigid containers, e.g. trays, bottles, boxes, cups
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D2205/00Venting means
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/13Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352Polymer or resin containing [i.e., natural or synthetic]

Definitions

  • the invention relates to a package according to the preamble of claim 1.
  • Packaging for goods - especially food - which are to be heated in the packaging are known.
  • the proliferation of microwave ovens has meant that virtually anyone can prepare hot snacks or regular hot meals or popcorn or the like directly in the package without having to use cookware or other containers (and clean them later) ,
  • Such a packaging construction is in the EP 0 661 219 B1 described.
  • a multi-part structure which includes a cut film and a layer associated therewith of a pressure-sensitive adhesive
  • this structure on the one hand the construction of a certain overpressure (which causes a shortening of the cooking time) and on the other hand, a controlled escape of an excessively large overpressure allows.
  • the complex multi-layered structure has relatively high production costs and also a limitation of the possible applications result.
  • the local receptacle for food is suitable for storage and for heating of ready meals, for example in the microwave, where it can be closed with a cover element which is connected via a weld or a peelable seal with the container.
  • This weld or seal comprises a main sealing region having at least one Soll mallklaabêt, which comprises a triangular cut, which is limited starting from the main sealing area to form a packaging interior facing the tip of two pointed sealing seams.
  • This inwardly directed Soll mallklaabites peels at overpressure in the container, whereby the container is opened like a valve.
  • the present invention seeks to ensure that the Soll joslrittabêt opens controlled at the inwardly directed tip.
  • This package can either be designed as a tubular bag or comprise a shell with sealing film, which is sealed along the edge of the shell with this. This marginal seal then defines the aforementioned main crucible region from which the target passage section extends into the packaging interior.
  • the triangular cutout of the Soll joslhouabitess is preferably still with a throttle serving as a channel with the environment in connection. This channel ensures a controlled pressure reduction within the packaging.
  • the duct serving as a throttle may widen toward the outer packaging edge.
  • the construction according to the invention is also suitable for stand-up pouches whose, for example, only upper closure seam or top seal seam is designed according to the invention.
  • the inwardly facing tip of the Soll joslhouabitess may be rounded with a small radius of curvature. It is essential for the controlled opening of the package to the outside, the seal width of the inwardly directed tip in the longitudinal direction.
  • Fig. 1 shows a schematic representation of a tubular bag 1, in which, for example, in the microwave heated food with non-liquid consistency (legumes, popcorn ...) is packed.
  • the tubular bag 1 is formed by annular folding and longitudinal sealing of a usually used for this purpose packaging film with a longitudinal sealing seam 3 and two opposite, substantially mutually parallel transverse sealing seams 5.
  • the formation of the transverse sealing seams 5 takes place with so-called PEEL films with reduced sealing seam strength.
  • PEEL films are also known per se and therefore do not require a more detailed description here.
  • the transverse sealing seams 5, which define so-called main sealing regions, have a congruent shape with each other, wherein in each case two sealing seam tips extend in the direction of the interior of the tubular bag 1 from a substantially rectilinear sealing seam course.
  • the sealing area (the sealing seam) has a substantially smaller width than in its rectilinear sections (in the example about 30% of the width there).
  • the two forming the top sealing seams 7 form an angle of approximately 50 ° with each other, but the invention is also executable with other angles.
  • the tip could alternatively also be formed by the convergence of two curved sealing seams and even slightly rounded (with a very small diameter). It does not have to protrude from an otherwise rectilinear seal, but the rest of the seal can also be bent or otherwise uneven.
  • a sealing seam gap 9 is formed in alignment with the longitudinal direction of the formed by the sealing seams 7 each tip, which acts as a - sealed in the delivery state of the tubular bag 1 by the mentioned tip - channel between the bag interior and the atmosphere. If, as a result of the heating of the contents in the tubular bag 1, a pressure exceeding a certain size is built up, then at the outermost sealing seam tip this pressure will first lead to a separation of the sealed film surfaces from one another, ie tearing of the transverse sealing seam. The pressurized gas in the interior of the tubular bag then enters into the triangular cut-out 11 and out of this through the channel 9 targeted into the atmosphere, whereby uncontrolled bursting ("crowning") of the tubular bag is prevented.
  • Fig. 2 shows a sealing tool 13 for the production of the tubular bag after Fig. 1 ,
  • This has a substantially cuboid base body 15, in which near the ends of two body gaps 21 are provided, which are each bridged by a tool tip 19.
  • the tool tips 19 ensure the mechanical integrity of the sealing tool as a whole and serve, on the other hand, as a shaping device for the tips defined by the sealing seams 7, which adjoin the transverse sealing seams 5 of the tubular bag 1 inwardly ( Fig. 1 ).
  • the sealing tool 13 is pressed in a conventional manner to the folded layers of the bag film and connects them along its active surface 17 with each other. Since the tops of the tool tips 19 are in a plane with the active surface 17 of the body 15, they act in full as part of the effective area and produce the sealing seam peaks with their punched, and the presence of the body gaps 21 leads to the formation of the channels 9 in the transverse sealing seams 5 of the tubular bag. 1
  • the first embodiment comprises a plastic bottom tray 22 made, for example, by deep-drawing a plastic film.
  • This shell has a peripheral sealing edge 23, onto which a sealing film for sealing the packaging interior 24 can be sealed.
  • the sealing edge 23 has two spaced-apart, the packaging interior 24 each facing and limited by sealing seams 7 peaks, each of which is arranged upstream of a serving as a throttle for the contents of the package channel 9.
  • the channel 9 is obtained in each case by punching the sealing edge 23. This punching can be obtained before, after or during sealing of the sealing film.
  • the sealing film preferably extends over the entire sealing edge 23, which here defines the so-called main sealing region, namely up to the outer edges thereof.
  • the corresponding sealing tool can be formed in this embodiment very easily and in a conventional manner, for example as a rectangular frame with a flat sealing surface. In particular, it is not necessary to form the sealing tool with tips according to the embodiment according to Fig. 2 ,
  • the sealing edge 23 defining the main sealing area and its inwardly projecting points are predetermined by corresponding deformation of the side walls of the base shell 22.
  • the tips preferably a channel corresponding to the channel 9 according to Fig. 1 be upstream.
  • This channel can be in Fig. 4 can also be obtained by appropriate deformation of the front side walls of the bottom shell 2.
  • the inwardly projecting tips are also bounded by tapered sealing seams 7, which are here an integral part of the sealing edge 23.
  • Fig. 5 shows a transverse or main seam 5 with adjoining sealing seams 7.
  • a limited by the tapered sealing seams 7 triangular punching is connected directly to the main seam 5, so that this is not weakened.
  • the defined by the punching 9 opening of the package can be closed to the outside again, if desired.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Package Specialized In Special Use (AREA)
  • Packages (AREA)
  • Bag Frames (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

A packaging (1) for a material that can be heated, especially microwave-heated, in the packaged state, which packaging has at least one sealing region (5) which becomes locally permeable when a predetermined internal pressure is exceeded. The or each sealing region of such a kind has at least one intended passage region (7, 9), which comprises a choke (9) for the contents of the packaging and an apex (7) pointing towards the interior of the packaging. As the choke there is used a channel-like, triangular or star-shaped interrupt ion or cut-out.

Description

Die Erfindung betrifft eine Verpackung gemäß dem Oberbegriff des Anspruches 1.The invention relates to a package according to the preamble of claim 1.

Verpackungen für Güter - insbesondere Lebensmittel -, welche in der Verpackung erwärmt werden sollen, sind bekannt. Insbesondere die massenhafte Verbreitung von Mikrowellengeräten hat dazu geführt, daß praktisch jedermann sich heiße Snacks oder regelrechte warme Mahlzeiten oder auch Popcorn o. ä. direkt in der Verpackung bereiten kann, ohne dazu Kochgeschirr oder sonstige Gefäße benutzen (und diese später wieder reinigen) zu müssen.Packaging for goods - especially food - which are to be heated in the packaging, are known. In particular, the proliferation of microwave ovens has meant that virtually anyone can prepare hot snacks or regular hot meals or popcorn or the like directly in the package without having to use cookware or other containers (and clean them later) ,

Bekannt ist auch das Problem, daß derartige Verpackungen aufgrund der Erwärmung und damit verbundenen Ausdehnung des Inhaltes zum Bersten - dem sogenannten "Bombieren" - neigen - was nicht nur ärgerlich, sondern u. U. auch gefährlich ist. Für gewisse Anwendungen und bis zu einem gewissen Grade kann man diesem Problem durch Überdimensionierung der Verpackung begegnen. Diese Überdimensionierung hat aber natürlich erhebliche Nachteile, u. a. einen Mehrverbrauch an Verpackungsmaterial und Transport- sowie Lagerraum. Es ist daher bereits nach speziellen Verpackungskonstruktionen gesucht wurden, mit denen man einem ungesteuerten Bombieren der Verpackung bei Erwärmung des Inhaltes begegnen kann.Also known is the problem that such packaging tend to burst due to the heating and associated expansion of the content - the so-called "crowning" - which is not only annoying, but u. U. also dangerous. For certain applications and to a certain extent, this problem can be addressed by oversizing the packaging. Of course, this oversizing has considerable disadvantages, u. a. an additional consumption of packaging material and transport and storage space. It is therefore already been searched for special packaging constructions with which one can counteract uncontrolled bombing of the package when heating the contents.

Eine derartige Verpackungskonstruktion wird in der EP 0 661 219 B1 beschrieben. Durch einen mehrteiligen Aufbau, der eine eingeschnittene Folie und eine dieser zugeordnete Schicht aus einem druckempfindlichen Klebstoff einschließt, wird bei diesem Aufbau einerseits der Aufbau eines gewissen Überdrucks (der eine Verkürzung der Garzeit bewirkt) und andererseits ein kontrolliertes Entweichen eines unzulässig großen Überdrucks ermöglicht. Der aufwendige mehrschichtige Aufbau hat jedoch relativ hohe Herstellungskosten und auch eine Beschränkung der Einsatzmöglichkeiten zur Folge.Such a packaging construction is in the EP 0 661 219 B1 described. By a multi-part structure, which includes a cut film and a layer associated therewith of a pressure-sensitive adhesive, in this structure, on the one hand the construction of a certain overpressure (which causes a shortening of the cooking time) and on the other hand, a controlled escape of an excessively large overpressure allows. However, the complex multi-layered structure has relatively high production costs and also a limitation of the possible applications result.

Eine weitere Verpackungskonstruktion in Form eines Aufnahmebehälters für Lebensmittel ist in der DE 198 60 473 A1 beschrieben. Der dortige Aufnahmebehälter für Lebensmittel ist zur Einlagerung und zum Erwärmen von Fertigmenüs, beispielsweise in der Mikrowelle, geeignet, wobei er mit einem Deckelement verschließbar ist, das über eine Schweißnaht oder eine peelbare Siegelung mit dem Behälter verbunden ist. Diese Schweißnaht bzw. Siegelung umfaßt einen Hauptsiegelbereich mit mindestens einem Solldurchlaßabschnitt, der eine dreieckige Ausstanzung umfaßt, die ausgehend vom Hauptsiegelbereich unter Ausbildung einer dem Verpackungsinnenraum zugewandten Spitze von zwei spitz aufeinander zulaufenden Siegelnähten begrenzt ist. Dieser nach innen gerichtete Solldurchlaßabschnitt peelt bei Überdruck im Behälter auf, wodurch der Behälter ventilartig geöffnet wird.Another packaging construction in the form of a food receptacle is in the DE 198 60 473 A1 described. The local receptacle for food is suitable for storage and for heating of ready meals, for example in the microwave, where it can be closed with a cover element which is connected via a weld or a peelable seal with the container. This weld or seal comprises a main sealing region having at least one Solldurchlaßabschnitt, which comprises a triangular cut, which is limited starting from the main sealing area to form a packaging interior facing the tip of two pointed sealing seams. This inwardly directed Solldurchlaßabschnitt peels at overpressure in the container, whereby the container is opened like a valve.

Ausgehend von diesem Stand der Technik liegt der vorliegenden Erfindung die Aufgabe zugrunde, sicherzustellen, daß der Solldurchlaßabschnitt kontrolliert an der nach innen gerichteten Spitze öffnet.Based on this prior art, the present invention seeks to ensure that the Solldurchlaßabschnitt opens controlled at the inwardly directed tip.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruches 1 gelöst.This object is achieved by the characterizing features of claim 1.

Dadurch, daß die seitliche Begrenzung der spitz aufeinander zulaufenden Siegelnähte des Solldurchlaßabschnitts innen- und außenseitig so abgewinkelt ist, daß die Breite der Versiegelung gemessen in Spitzen-Längsrichtung am vorderen Ende der Spitze etwa derjenigen im Bereich der Basis gemessen in Richtung des Hauptsiegelbereichs entspricht, ist gewährleistet, daß die vorgenannte Spitze unter Druck als erstes öffnet. Man erhält eine definierte Selbstöffnung der Verpackung.Characterized in that the lateral boundary of the pointed sealing seams of Solldurchlaßabschnitts inside and outside is angled so that the width of the seal measured in the tip longitudinal direction at the front end of the tip about that in the region of the base measured in the direction of the main sealing region corresponds ensures that the aforementioned tip opens under pressure first. This gives a defined self-opening of the packaging.

Diese Verpackung kann entweder als Schlauchbeutel ausgebildet sein oder eine Schale mit Siegelfolie umfassen, die längs des Randes der Schale mit dieser versiegelt ist. Diese Randsiegelung definiert dann den vorgenannten Hauptsiegelbereich, von dem aus sich der Solldurchlaßabschnitt in den Verpackungsinnenraum hinein erstreckt.This package can either be designed as a tubular bag or comprise a shell with sealing film, which is sealed along the edge of the shell with this. This marginal seal then defines the aforementioned main crucible region from which the target passage section extends into the packaging interior.

Die dreieckige Ausstanzung des Solldurchlaßabschnitts steht vorzugsweise auch noch mit einem als Drossel dienenden Kanal mit der Umgebung in Verbindung. Dieser Kanal stellt einen kontrollierten Druckabbau innerhalb der Verpackung sicher.The triangular cutout of the Solldurchlaßabschnitts is preferably still with a throttle serving as a channel with the environment in connection. This channel ensures a controlled pressure reduction within the packaging.

Bei einer bevorzugten Ausführungsform kann der als Drossel dienende Kanal sich in Richtung zur Verpackungsaußenkante hin verbreitern.In a preferred embodiment, the duct serving as a throttle may widen toward the outer packaging edge.

Selbstverständlich ist es denkbar, jeder Verpackung mehr als einen Solldurchlaßabschnitt der vorstehend genannten Art zuzuordnen.Of course, it is conceivable to associate more than one Solldurchlaßabschnitt the aforementioned type of each package.

Die erfindungsgemäße Konstruktion eignet sich auch für Standbeutel, deren zum Beispiel nur obere Verschlußnaht bzw. Kopfsiegelnaht erfindungsgemäß ausgebildet ist.The construction according to the invention is also suitable for stand-up pouches whose, for example, only upper closure seam or top seal seam is designed according to the invention.

Es sei auch darauf hingewiesen, daß die nach innen weisende Spitze des Solldurchlaßabschnitts mit geringem Krümmungsradius verrundet sein kann. Wesentlich ist zur kontrollierten Öffnung der Verpackung nach außen die Siegelbreite der nach innen gerichteten Spitze in Spitzen-Längsrichtung.It should also be noted that the inwardly facing tip of the Solldurchlaßabschnitts may be rounded with a small radius of curvature. It is essential for the controlled opening of the package to the outside, the seal width of the inwardly directed tip in the longitudinal direction.

Nachstehend wird die Erfindung anhand von Ausführungsbeispielen, die in der anliegenden Zeichnung schematisch dargestellt sind, näher erläutert. Diese zeigt in:

Fig. 1
eine schematische Draufsicht auf einen Schlauchbeutel mit erfindungsgemäßer Querversiegelung;
Fig. 2
eine perspektivische Darstellung eines Siegelwerkzeuges zur Herstellung des Schlauchbeutels nach Fig. 1;
Fig. 3 u. 4
zwei unterschiedliche Ausführungsformen einer Schalenverpackung mit erfindungsgemäß ausgebildetem Siegelrand jeweils in perspektivischer Ansicht von schräg oben; und
Fig. 5
eine bevorzugte Ausführungsform eines erfindungsgemäßen Solldurchlaßabschnitts in schematischer Draufsicht.
The invention will be explained in more detail below with reference to exemplary embodiments, which are shown schematically in the attached drawing. This shows in:
Fig. 1
a schematic plan view of a tubular bag with inventive transverse seal;
Fig. 2
a perspective view of a sealing tool for producing the tubular bag after Fig. 1 ;
Fig. 3 u. 4
two different embodiments of a tray packaging inventively formed sealing edge respectively in a perspective view obliquely from above; and
Fig. 5
a preferred embodiment of a Solldurchlaßabschnitts invention in a schematic plan view.

Fig. 1 zeigt in schematischer Darstellung einen Schlauchbeutel 1, in dem beispielsweise in der Mikrowelle erhitzbares Essen mit nicht-flüssiger Konsistenz (Hülsenfrüchte, Popcorn ...) verpackt ist. Der Schlauchbeutel 1 ist durch ringförmiges Zusammenlegen und Längsversiegelung einer üblicherweise zu diesem Zweck eingesetzten Verpackungsfolie mit einer Längssiegelnaht 3 und zwei einander gegenüberliegenden, im wesentlichen parallel zueinander verlaufenden Quersiegelnähten 5 gebildet. Die Bildung der Quersiegelnähte 5 erfolgt mit sogenannten PEEL-Folien mit verringerter Siegelnahtfestigkeit. Auch solche PEEL-Folien sind an sich bekannt und bedürfen daher hier keiner genaueren Beschreibung. Fig. 1 shows a schematic representation of a tubular bag 1, in which, for example, in the microwave heated food with non-liquid consistency (legumes, popcorn ...) is packed. The tubular bag 1 is formed by annular folding and longitudinal sealing of a usually used for this purpose packaging film with a longitudinal sealing seam 3 and two opposite, substantially mutually parallel transverse sealing seams 5. The formation of the transverse sealing seams 5 takes place with so-called PEEL films with reduced sealing seam strength. Such PEEL films are also known per se and therefore do not require a more detailed description here.

Die Quersiegelnähte 5, die sog. Hauptsiegelbereiche definieren, haben eine zueinander kongruente Gestalt, wobei sich aus einem im wesentlichen geradlinigen Siegelnahtverlauf jeweils zwei Siegelnahtspitzen in Richtung auf den Innenraum des Schlauchbeutels 1 erstrecken. Im Bereich der Spitzen hat der Versiegelungsbereich (die Siegelnaht) eine wesentlich geringere Breite als in ihren geradlinig verlaufenden Abschnitten (im Beispiel etwa 30% der dortigen Breite).The transverse sealing seams 5, which define so-called main sealing regions, have a congruent shape with each other, wherein in each case two sealing seam tips extend in the direction of the interior of the tubular bag 1 from a substantially rectilinear sealing seam course. In the area of the tips, the sealing area (the sealing seam) has a substantially smaller width than in its rectilinear sections (in the example about 30% of the width there).

Die beiden die Spitze bildenden Siegelnähte 7 schließen einen Winkel von ca. 50° miteinander ein, die Erfindung ist aber auch mit anderen Winkeln ausführbar. Des weiteren könnte die Spitze alternativ auch durch das Zusammenlaufen zweier gekrümmter Siegelnähte gebildet und sogar (mit sehr kleinem Durchmesser) leicht verrundet sein. Sie muß auch nicht aus einer ansonsten geradlinig verlaufenden Siegelnaht hervorstehen, sondern der übrige Verlauf der Siegelnaht kann auch gebogen oder in sonstiger Weise ungleichmäßig sein.The two forming the top sealing seams 7 form an angle of approximately 50 ° with each other, but the invention is also executable with other angles. Furthermore, the tip could alternatively also be formed by the convergence of two curved sealing seams and even slightly rounded (with a very small diameter). It does not have to protrude from an otherwise rectilinear seal, but the rest of the seal can also be bent or otherwise uneven.

Im geradlinigen Verlauf der Quersiegelnähte 5 ist in Ausrichtung zur Längsrichtung der durch die Siegelnähte 7 gebildeten Spitze jeweils eine Siegelnahtlücke 9 gebildet, die als ein - im Auslieferungszustand des Schlauchbeutels 1 durch die erwähnte Spitze verschlossener - Kanal zwischen dem Beutelinneren und der Atmosphäre fungiert. Wird infolge der Erwärmung des Inhaltes in dem Schlauchbeutel 1 ein eine bestimmte Größe übersteigender Überdruck aufgebaut, so wird an der äußersten Siegelnahtspitze dieser Druck zuerst zu einem Voneinander-Lösen der miteinander versiegelten Folienflächen, also einem Aufreißen der Quersiegelnaht führen. Das unter Überdruck stehende Gas im Inneren des Schlauchbeutels tritt dann in die dreieckige Ausstanzung 11 und aus dieser durch den Kanal 9 gezielt in die Atmosphäre aus, wodurch ein ungesteuertes Bersten ("Bombieren") des Schlauchbeutels verhindert wird.In the rectilinear course of the transverse sealing seams 5 a sealing seam gap 9 is formed in alignment with the longitudinal direction of the formed by the sealing seams 7 each tip, which acts as a - sealed in the delivery state of the tubular bag 1 by the mentioned tip - channel between the bag interior and the atmosphere. If, as a result of the heating of the contents in the tubular bag 1, a pressure exceeding a certain size is built up, then at the outermost sealing seam tip this pressure will first lead to a separation of the sealed film surfaces from one another, ie tearing of the transverse sealing seam. The pressurized gas in the interior of the tubular bag then enters into the triangular cut-out 11 and out of this through the channel 9 targeted into the atmosphere, whereby uncontrolled bursting ("crowning") of the tubular bag is prevented.

Fig. 2 zeigt ein Siegelwerkzeug 13 zur Herstellung des Schlauchbeutels nach Fig. 1. Dieses hat einen im wesentlichen quaderförmigen Grundkörper 15, in dem nahe der Enden zwei Grundkörper-Lücken 21 vorgesehen sind, welche jeweils durch eine Werkzeugspitze 19 überbrückt werden. Die Werkzeugspitzen 19 gewährleisten zum einen die mechanische Integrität des Siegelwerkzeugs als Ganzes und dienen zum anderen als Formgeber für die durch die Siegelnähte 7 definierten Spitzen, die an die Quersiegelnähte 5 des Schlauchbeutels 1 nach innen hin gerichtet anschließen (Fig. 1). Fig. 2 shows a sealing tool 13 for the production of the tubular bag after Fig. 1 , This has a substantially cuboid base body 15, in which near the ends of two body gaps 21 are provided, which are each bridged by a tool tip 19. On the one hand, the tool tips 19 ensure the mechanical integrity of the sealing tool as a whole and serve, on the other hand, as a shaping device for the tips defined by the sealing seams 7, which adjoin the transverse sealing seams 5 of the tubular bag 1 inwardly ( Fig. 1 ).

Das Siegelwerkzeug 13 wird in an sich bekannter Weise auf die zusammengelegten Lagen der Beutelfolie gepreßt und verbindet diese entlang seiner Wirkfläche 17 miteinander. Da die Oberseiten der Werkzeugspitzen 19 in einer Ebene mit der Wirkfläche 17 des Grundkörpers 15 liegen, wirken diese in vollem Umfang als Teil der Wirkfläche und erzeugen die Siegelnahtspitzen mit ihren Ausstanzungen, und das Vorhandensein der Grundkörper-Lücken 21 führt zur Ausbildung der Kanäle 9 in den Quersiegelnähten 5 des Schlauchbeutels 1.The sealing tool 13 is pressed in a conventional manner to the folded layers of the bag film and connects them along its active surface 17 with each other. Since the tops of the tool tips 19 are in a plane with the active surface 17 of the body 15, they act in full as part of the effective area and produce the sealing seam peaks with their punched, and the presence of the body gaps 21 leads to the formation of the channels 9 in the transverse sealing seams 5 of the tubular bag. 1

In den Figuren 3 und 4 sind zwei unterschiedliche Ausführungsformen einer Schalenverpackung jeweils in perspektivischer Ansicht von schräg oben dargestellt. Die erste Ausführungsform umfaßt eine Bodenschale 22 aus Kunststoff, die zum Beispiel durch Tiefziehen einer Kunststoffolie hergestellt ist. Diese Schale weist einen umlaufenden Siegelrand 23 auf, auf den eine Siegelfolie zum Verschluß des Verpackungsinnenraumes 24 aufsiegelbar ist. An einer Stirnseite weist der Siegelrand 23 zwei im Abstand voneinander angeordnete, dem Verpackungsinnenraum 24 jeweils zugewandte und durch Siegelnähte 7 begrenzte Spitzen auf, denen jeweils ein als Drossel für den Verpackungsinhalt dienender Kanal 9 vorgeordnet ist. Der Kanal 9 wird jeweils durch Ausstanzung des Siegelrandes 23 erhalten. Diese Ausstanzung kann vor dem, nach dem oder beim Aufsiegeln der Siegelfolie erhalten werden. Die Siegelfolie erstreckt sich vorzugsweise über den gesamten Siegelrand 23, der hier den sog. Hauptsiegelbereich definiert, und zwar bis zu den äußeren Rändern desselben. Das entsprechende Siegelwerkzeug kann bei dieser Ausführungsform sehr einfach und in herkömmlicher Weise ausgebildet werden, zum Beispiel als Rechteckrahmen mit planer Siegelfläche. Insbesondere ist es nicht erforderlich, das Siegelwerkzeug mit Spitzen auszubilden entsprechend der Ausführungsform nach Fig. 2.In the Figures 3 and 4 are two different embodiments of a tray packaging each shown in a perspective view obliquely from above. The first embodiment comprises a plastic bottom tray 22 made, for example, by deep-drawing a plastic film. This shell has a peripheral sealing edge 23, onto which a sealing film for sealing the packaging interior 24 can be sealed. On one end side, the sealing edge 23 has two spaced-apart, the packaging interior 24 each facing and limited by sealing seams 7 peaks, each of which is arranged upstream of a serving as a throttle for the contents of the package channel 9. The channel 9 is obtained in each case by punching the sealing edge 23. This punching can be obtained before, after or during sealing of the sealing film. The sealing film preferably extends over the entire sealing edge 23, which here defines the so-called main sealing region, namely up to the outer edges thereof. The corresponding sealing tool can be formed in this embodiment very easily and in a conventional manner, for example as a rectangular frame with a flat sealing surface. In particular, it is not necessary to form the sealing tool with tips according to the embodiment according to Fig. 2 ,

Bei der Ausführungsform nach Figur 4 wird der den Hauptsiegelbereich definierende Siegelrand 23 und dessen nach innen ragenden Spitzen durch entsprechende Verformung der Seitenwände der Bodenschale 22 vorgegeben. Dabei kann auch hier den Spitzen vorzugsweise ein Kanal entsprechend dem Kanal 9 gemäß Fig. 1 vorgeordnet sein. Dieser Kanal kann in Fig. 4 ebenfalls durch entsprechende Verformung der stirnseitigen Seitenwände der Bodenschale 2 erhalten werden. Die nach innen ragenden Spitzen werden ebenfalls durch spitz aufeinander zulaufende Siegelnähte 7 begrenzt, die hier integraler Teil des Siegelrandes 23 sind.In the embodiment according to FIG. 4 the sealing edge 23 defining the main sealing area and its inwardly projecting points are predetermined by corresponding deformation of the side walls of the base shell 22. Here, too, the tips preferably a channel corresponding to the channel 9 according to Fig. 1 be upstream. This channel can be in Fig. 4 can also be obtained by appropriate deformation of the front side walls of the bottom shell 2. The inwardly projecting tips are also bounded by tapered sealing seams 7, which are here an integral part of the sealing edge 23.

Fig. 5 zeigt eine Quer- bzw. Hauptsiegelnaht 5 mit daran anschließenden Siegelnähten 7. Eine durch die spitz aufeinander zulaufenden Siegelnähte 7 begrenzte dreieckige Ausstanzung ist unmittelbar an die Hauptsiegelnaht 5 angeschlossen, so daß diese dadurch nicht geschwächt ist. Durch einen Verschluß kann die durch die Ausstanzung 9 definierte Öffnung der Verpackung nach außen wieder verschlossen werden, sofern dies gewünscht ist. Fig. 5 shows a transverse or main seam 5 with adjoining sealing seams 7. A limited by the tapered sealing seams 7 triangular punching is connected directly to the main seam 5, so that this is not weakened. By a closure, the defined by the punching 9 opening of the package can be closed to the outside again, if desired.

Es sei darauf hingewiesen, daß sämtliche Ausführungsformen mit einem Solldurchlaß entsprechend Fig. 5 versehen sind, der dadurch gekennzeichnet ist, daß die beiden Schenkel des die Spitze definierenden Solldurchlaßabschnitts innen- oder außenseitig so abgewinkelt sind, daß die Breite der Versiegelung auch am vordersten Ende der Spitze, d.h. in Spitzen-Längsrichtung etwa derjenigen im übrigen Bereich derselben entspricht. Damit ist auf jeden Fall sichergestellt, daß die Spitze unter Druck als erstes öffnet. Man erhält eine definierte Selbstöffnung der Verpackung.It should be noted that all embodiments with a Solldurchlaß accordingly Fig. 5 are provided, which is characterized in that the two legs of the tip defining the Solldurchlaßabschnitts inside or outside are angled so that the width of the seal at the foremost end of the tip, ie in the tip longitudinal direction approximately equal to that in the remaining area thereof. This ensures in any case that the tip opens under pressure first. This gives a defined self-opening of the packaging.

Claims (5)

  1. Packaging (1) for a product capable of being heated in the pack, especially capable of being microwaved in the pack, which provides at least one main sealing region (5) with at least one self-opening portion (7, 9), which comprises a triangular punched recess (11), which, extending from the main sealing region (5), is limited by two sealing seams (7) converging into a point and thereby providing an apex facing towards the interior of the packaging,
    characterised in that
    the lateral limit of the sealing seams (7) converging to form an apex is angled internally and externally in such a manner that the width of the seal measured in the longitudinal direction of the apex at the front end of the apex approximately corresponds to that in the region of the base measured in the direction of the main sealing region of the seal (5).
  2. Packaging according to claim 1,
    characterised in that
    it is formed as a tubular bag (1).
  3. Packaging according to claim 1,
    characterised in that
    it comprises a (base) shell (22) and sealing foil, which is sealed to the shell along the edge (23) of the shell.
  4. Packaging according to any one of claims 1 to 3,
    characterised in that
    the triangular punched recess (11) of the self-opening portion (7, 9) is connected to the environment via a channel (9) acting as a choke.
  5. Packaging according to any one of claims 1 to 4,
    characterised in that
    the channel (9) acting as a choke widens in the direction towards the outer edge of the packaging.
EP02796631A 2001-12-14 2002-12-13 Packaging and sealing tool for production thereof Expired - Lifetime EP1453744B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE20120253U DE20120253U1 (en) 2001-12-14 2001-12-14 Packaging and sealing tool for the production of such
DE20120253U 2001-12-14
DE10211593A DE10211593A1 (en) 2001-12-14 2002-03-15 Packaging used for a heatable, especially microwaveable product comprises a seal region with a predetermined penetration section having a point facing the inside of the packaging
DE10211593 2002-03-15
PCT/EP2002/014242 WO2003051745A1 (en) 2001-12-14 2002-12-13 Packaging and sealing tool for production thereof

Publications (2)

Publication Number Publication Date
EP1453744A1 EP1453744A1 (en) 2004-09-08
EP1453744B1 true EP1453744B1 (en) 2008-03-05

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US (1) US8153216B2 (en)
EP (1) EP1453744B1 (en)
CN (1) CN1615252A (en)
AT (1) ATE388098T1 (en)
AU (1) AU2002361413A1 (en)
CA (1) CA2470054A1 (en)
DE (1) DE50211855D1 (en)
HU (1) HUP0402509A3 (en)
NZ (1) NZ533452A (en)
PL (1) PL196345B1 (en)
WO (1) WO2003051745A1 (en)

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PL196345B1 (en) 2007-12-31
HUP0402509A3 (en) 2005-05-30
PL373491A1 (en) 2005-09-05
AU2002361413A1 (en) 2003-06-30
DE50211855D1 (en) 2008-04-17
US20080044525A1 (en) 2008-02-21
HUP0402509A2 (en) 2005-04-28
US8153216B2 (en) 2012-04-10
NZ533452A (en) 2005-12-23
ATE388098T1 (en) 2008-03-15
CN1615252A (en) 2005-05-11
EP1453744A1 (en) 2004-09-08
WO2003051745A1 (en) 2003-06-26
CA2470054A1 (en) 2003-06-26

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