DE4020371C1 - Sealing of glass and plastics containers - involves use of metallic layer and induction ring - Google Patents

Sealing of glass and plastics containers - involves use of metallic layer and induction ring

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Publication number
DE4020371C1
DE4020371C1 DE4020371A DE4020371A DE4020371C1 DE 4020371 C1 DE4020371 C1 DE 4020371C1 DE 4020371 A DE4020371 A DE 4020371A DE 4020371 A DE4020371 A DE 4020371A DE 4020371 C1 DE4020371 C1 DE 4020371C1
Authority
DE
Germany
Prior art keywords
sealing
membranes
sealing membranes
membrane
closure
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 - Fee Related
Application number
DE4020371A
Other languages
German (de)
Inventor
Norbert 6246 Glashuetten De Herrmann
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.)
KROMA HERRMANN und WOLF NACHFOLGER NORBERT HERRMANN 6246 GLASHUETTEN DE
Original Assignee
KROMA HERRMANN und WOLF NACHFOLGER NORBERT HERRMANN 6246 GLASHUETTEN DE
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Application filed by KROMA HERRMANN und WOLF NACHFOLGER NORBERT HERRMANN 6246 GLASHUETTEN DE filed Critical KROMA HERRMANN und WOLF NACHFOLGER NORBERT HERRMANN 6246 GLASHUETTEN DE
Priority to DE4020371A priority Critical patent/DE4020371C1/en
Application granted granted Critical
Publication of DE4020371C1 publication Critical patent/DE4020371C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3644—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a ribbon, band or strip
    • 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
    • B65D79/00—Kinds or details of packages, not otherwise provided for
    • B65D79/005—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
    • B65D79/0087—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a closure, e.g. in caps or lids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24221—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being circular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72327—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
    • B29C66/72328—Paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7234—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a barrier layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
    • B65B7/2842—Securing closures on containers
    • B65B7/2878—Securing closures on containers by heat-sealing
    • 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
    • B65D53/00—Sealing or packing elements; Sealings formed by liquid or plastics material
    • B65D53/04—Discs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic

Abstract

The method of sealing glass, plastics or other non-metallic containers (1) involves high-frequency processes. Closure membranes are made of non-metallic materials but a metal layer, esp. one of aluminium is used. Only that part of the closure-membrane near the sealing surface has a metal coating. Outside the sealing surface, the closure membrane is transparent and made of elastically deformable material. The closure membrane is made of multi-ply material, reinforced by segments outside its centre. USE/ADVANTAGE - The metal component of the closure membrane for a contained is reduced.

Description

Die Erfindung bezieht sich auf ein Verfahren zur Hochfre­ quenz-Versiegelung von Behältern aus Glas, Kunststoff oder anderen nichtmetallischen Materialien mittels Verschluß­ membranen aus nichtmetallischen Werkstoffen, wobei für das Hochfrequenzversiegeln die Verschlußmembranen mit einer Me­ tallschicht, insbesondere aus Aluminium, versehen werden.The invention relates to a method for Hochfre quenz sealing of containers made of glass, plastic or other non-metallic materials by means of a closure membranes made of non-metallic materials, whereby for the High-frequency sealing the sealing membranes with a me tallschicht, in particular made of aluminum.

Bei derartigen Verfahren zur Hf-Siegelung, u. a. in der DE-GM 19 78 557 und DE-OS 22 37 322 beschrieben, werden voll­ flächig beschichtete Scheiben-Metallmembranen mittels der Hochfrequenztechnik zum Verschließen von Behältern aufge­ siegelt. Diese scheibenförmigen metall-/nichtmetallischen Siegelmembranen erweisen sich für das induktive Heißsiegel­ verfahren als sehr nachteilig, da sich die für den Siegel­ vorgang induzierten Wirbelströme auf die Gesamtmetallfläche verteilen. Dadurch treten außerhalb der definierten Siegel­ zone unerwünschte Streuströme auf, die sich energieverzeh­ rend auswirken, so daß ein konzentrierter Energiefluß in die eigentliche Siegelzone nicht möglich ist.In such methods for RF sealing, u. a. in the DE-GM 19 78 557 and DE-OS 22 37 322 described are full flat coated disc metal membranes by means of High-frequency technology for closing containers seals. These disc-shaped metal / non-metallic Sealing membranes prove to be an inductive heat seal proceed as very disadvantageous, since they are for the seal process induced eddy currents on the total metal surface to distribute. This will step outside the defined seal zone unwanted stray currents that are energy-consuming rend impact, so that a concentrated flow of energy in the actual sealing zone is not possible.

Noch problematischer und unkontrollierbarer ist die induk­ tive Siegelung, wenn diese Metallscheiben mit einer segment­ artigen Öffnungshilfe oder einem Bördelrand über die zu ver­ siegelnde Behältermündung hinausragen.The induk is even more problematic and uncontrollable tive sealing when these metal discs with a segment like opening aid or a flange over the ver protruding sealing container mouth.

Bei einer solchen Anordnung muß noch mehr Energie aufgewen­ det werden, um eine sichere Aufsiegelung der Scheibenmembra­ ne und damit eine Abdichtung der Behälter zu erreichen, wo­ durch die Außenrandzonen der Siegelmembranen zwangsläufig hochbelastet werden, ohne daß dabei eine gleichmäßige Siegel­ nahtfestigkeit in der Siegelfläche erzielt wird.With such an arrangement, more energy must be used to ensure a safe sealing of the disc membrane ne and thus to achieve a seal of the container where inevitably through the outer edge zones of the sealing membranes  be heavily loaded without losing an even seal seam strength is achieved in the sealing surface.

Diesem Nachteil mittels speziell ausgebildeter/ausgeformter Induktoren (Hf-Siegelköpfen) zu begegnen, führt nach wie vor zu unbefriedigenden Ergebnissen. Punktuell kann zwar der in­ duzierte Wärmefluß verbessert werden, doch läßt sich das energieverzehrende Auswandern des induzierten Wirbelstromes über die eigentlich zu versiegelnde Fläche hinaus nicht ver­ hindern.This disadvantage by means of specially trained / shaped Countering inductors (RF sealing heads) continues to lead to unsatisfactory results. The in Reduced heat flow can be improved, but can energy-consuming emigration of the induced eddy current do not exceed the area to be sealed prevent.

Weiterhin besteht bei den bisher verwendeten Metallscheiben- Verschlußmembranen keine Möglichkeit einer automatischen oder visuellen Dichtigkeitskontrolle der Fertigpackung, wie dies bei Vollmetall-Verschlüssen (Twist-off, PT etc. - auch in Flip-Flop-Ausführung - ) mittlerweile verfügbar ist. Die z. Zt. verwendeten Verschlußmembranen verharren durch pla­ stische Materialverformung trotz einer vorliegenden Leckage bzw. auftretendem Druckverlust in ihrer einen Unterdruck vor­ täuschenden konkaven Verarbeitungslage, welche z. B. durch Heißfüllung, Pasteurisation oder Sterilisation der Produkte und dem sich dadurch im Kopfraum des Behälters bildenden Un­ terdrucks (Vakuum) eintritt.Furthermore, the metal disc Sealing membranes no possibility of automatic or visual tightness control of the prepackage like this for full metal closures (twist-off, PT etc. - also in Flip-flop version -) is now available. The z. Closure membranes currently used persist through pla tical material deformation despite a leak or occurring pressure loss in their one negative pressure deceptive concave processing layer, which z. B. by Hot filling, pasteurization or sterilization of the products and the resulting Un in the headspace of the container terdrucks (vacuum) occurs.

So verfügen diese Metallmembranen materialbedingt weder über die Eigenschaft, sich in eine plane Lage zurückzustellen, wenn ein Unterdruck durch Undichtigkeit abgebaut wird, noch in eine konvexe und damit Überdruck bzw. leckanzeigende Signalstellung überzugehen.For example, these metal membranes do not have any material properties the ability to return to a flat position when a vacuum is broken down by leakage, still in one convex and therefore overpressure or leak-indicating signal position to pass over.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Verfahren zu entwickeln, welches die geschilderten Nachteile vermeidet, wobei gleichzeitig der für die Hochfrequenz-Ver­ siegelung notwendige metallische Anteil der Siegelmembrane so reduziert wird, daß sich die induzierten Wirbelströme energie­ sparend nur auf den zu versiegelnden Bereich konzentrieren und damit unproduktiver Streustrom vermieden wird.The present invention is based on the object To develop a method which has the disadvantages described avoids, while at the same time for the high-frequency Ver necessary metallic part of the sealing membrane is reduced that the induced eddy currents energy only focus on the area to be sealed and  so that unproductive stray current is avoided.

Gleichzeitig soll eine Dichtigkeitkontrolle der Fertigpac­ kung ermöglicht werden.At the same time, a tightness check of the finished pack be made possible.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Verschlußmembranen lediglich im Bereich der Siegelfläche mit der Metallschicht versehen werden.The object is achieved in that the Sealing membranes only in the area of the sealing surface be provided with the metal layer.

Der Metallanteil in den Siegelmembranen wird damit um 80- 90% gesenkt, wodurch gleichzeitig eine erhebliche Reduzie­ rung - ca. 30 bis 40% - des Energieeinsatzes möglich ist. Dies wiederum ermöglicht eine kostengünstigere, wirtschaft­ lichere Auslegung des Hf-Generators und/oder Senkung der Siegelzeit bzw. Erhöhung des Artikeldurchsatzes.The metal content in the sealing membranes is thus 80- 90% reduced, which also leads to a significant reduction approx. 30 to 40% of the energy input is possible. This in turn enables a more economical, economical more sensible design of the HF generator and / or lowering the Sealing time or increase in article throughput.

Durch den lediglich auf die zu versiegelnden/abzudichtenden Behälterränder abgestimmten metallischen Materialeinsatz wird es möglich, Unter- bzw. Überdruck (Flip-Flop) anzei­ gende Verschlußmembranen herzustellen, da für den nunmehr metallfreien Bereich elastisch verformbare Barriere- und Heißsiegelwerkstoffe verfahrentechnisch genutzt werden kön­ nen.Due to the only to be sealed / sealed Container edges matched metallic material use it becomes possible to display negative or positive pressure (flip-flop) to produce sealing membranes, as for the now metal-free area elastically deformable barrier and Heat sealing materials can be used for process engineering nen.

Weiterhin wird durch das erfindungsgemäße Verfahren auch der Einsatz geeigneter transparenter Materialien möglich, so daß der metallschichtfreie Bereich der Verschlußmembrane als Sichtfenster oder unter bestimmten Voraussetzungen gleichzeitig als Dichtigkeitskontrollbereich und oder als Flip-Flop-Variante ausgebildet werden kann.Furthermore, the method according to the invention also suitable transparent materials can be used, so that the metal layer-free area of the closure membrane as a viewing window or under certain conditions at the same time as a tightness control area and or as Flip-flop variant can be formed.

Die erfindungsgemäßen Siegelmembranvarianten lassen sich in vorteilhafter Weise auch zu einem Deckel-Kartonettenverbund zusammenführen und so die Metall- und Energieeinsparung auch für diese Verschlußtechnik erschließen. The sealing membrane variants according to the invention can be found in advantageously also to a lid-cardboard composite merge and so the metal and energy savings too open up for this locking technique.  

Ausschlaggebend für das erfindungsgemäße Verfahren ist der auf die Siegelfläche begrenzte metallische Anteil - Induk­ tions- "Ring" - in den Verschlußmembranen.The decisive factor for the method according to the invention is metallic portion limited to the sealing surface - induc tion "ring" - in the sealing membranes.

Diese Verschlußmembranen können über den erfindungsgemäßen Induktions-"Ring" in vorteilhafter Weise und unter ökolo­ gischen und ökonomischen Gesichtspunkten variiert und damit eine, auf die wirklichen Erfordernisse und Anforderungen zu­ geschnitte Materialauswahl realisiert werden.These closure membranes can over the invention Induction "ring" in an advantageous manner and under ecological Varying economic and economic aspects and thus one, towards the real needs and requirements cut material selection can be realized.

Ausführungsbeispiele der Erfindung sind in den beigefügten Zeichnungen dargestellt sowie der Kommentierung zu entneh­ men.Embodiments of the invention are in the accompanying Drawings shown and the commentary men.

Fig. 1 Die erfindungsgemäß auf die Siegelfläche begrenzte Metallschicht kann beispielsweise, wie in Fig. 1 in der Abwicklung dargestellt, aus einem Bandmate­ rial in Materialmehrfachnutzen ausgestanzten Induk­ tions-"Ringen" gebildet werden. Die für die Siegel­ fläche erforderlichen "Ringgrößen" werden auf ein Trägermaterial entsprechender Dimensionierung ka­ schiert. Der so hergestellte Verbund bildet nach entsprechender Formatierung eine Hf-siegelbare Ver­ schlußmembrane. Fig. 1 The metal layer according to the invention limited to the sealing surface can be formed, for example, as shown in Fig. 1 in the development, from a band material in multiple material stamped induction "rings". The "ring sizes" required for the sealing surface are coated on a substrate of appropriate dimensions. After appropriate formatting, the composite thus produced forms an RF-sealable sealing membrane.

Die auf die Siegelfläche begrenzte Metallschicht kann selbst­ verständlich auch durch andere geeignete Verfahren, beispiels­ weise durch Aufdampfen, Aufbronzieren etc., auf oder in die Verschlußmembrane eingearbeitet werden.The metal layer limited to the sealing surface can itself understandable also by other suitable methods, for example by evaporation, bronzing, etc., on or in the Closing membrane are incorporated.

Fig. 2 zeigt einen Verfahrensschritt einer erfindungsgemäßen Verschlußmembrane in Flip-Flop-Ausführung zur Dichtig­ keitskontrolle, wobei Unterdruck (Vakuum gezogen) = dichte Verpackung durch konkave, Überdruck bzw. Va­ kuumverluste = Leckage durch konvexe bzw. plane Stel­ lung der Membrane signalisiert werden soll. Fig. 2 shows a method step of a closure membrane according to the invention in flip-flop design for tightness control, vacuum (vacuum drawn) = tight packaging by concave, overpressure or vacuum losses = leakage through convex or planar position of the membrane should be signaled .

Bei Einsatz eines transparenten Werkstoffs für die Membran ist auch bei nichttransparenten Verpackungsbe­ hältern ein Einblick auf das Produkt bei ungeöffneter Verpackung möglich.When using a transparent material for the Membrane is also used for non-transparent packaging keep an eye on the product when unopened Packaging possible.

Die Verschlußmembranen können aus Steifigkeitsgründen und je nach Anforderungs-, Produkt- und Abfüllprozeß­ bedingungen aus zwei-, drei- oder mehrlagigem Verbund gebildet werden.The sealing membranes can be used for reasons of rigidity and depending on the requirements, product and filling process conditions from two, three or multi-layer composite be formed.

Dieses wird dann gemacht, wenn für die entsprechenden Anforderungsparameter kein geeignetes elastisch ver­ formbares Material für die Vakuum-Membran verfügbar ist. Es ist deshalb vorgesehen, die elastische Verform­ barkeit im Zentrum der Membran dergestalt herzustellen, daß Versteifungssegmente in zu definierender Dimensio­ nierung aus nichtmetallischen und/oder metallischen Materialien auf und/oder unter die Vakuum-Membran lami­ niert werden.This is done if for the appropriate Requirement parameters no suitable elastic ver malleable material available for the vacuum membrane is. It is therefore provided the elastic deformation manufacture in the center of the membrane in such a way that stiffening segments in dimensions to be defined Nation made of non-metallic and / or metallic Materials on and / or under the vacuum membrane lami be kidneyed.

Die Versteifung einerseits und Materialschwächung an­ dererseits ermöglichen die gezielte Verformbarkeit im Zentrum.The stiffening on the one hand and material weakening on the other hand, allow the targeted deformability in the Center.

Für eine verbesserte Erkennbarkeit der Unter- bzw. Überdrucksituation ist weiterhin vorgesehen, eine Un­ terbahn einzubinden, welche statt der in den Verstei­ fungssegmenten mittig angeordneten Aussparungen (Ma­ terialschwächung) mit Vakuumkanälen (Perforation) im Zentrum ausgestattet ist.For improved visibility of the lower or An overpressure situation is still planned terbahn, which instead of in the Verstei recesses arranged in the middle (Ma weakening of the material) with vacuum channels (perforation) in the Center is equipped.

Mit diesen Flip-Flop/Vakuum-Verschlußmembranen wird gleichzeitig eine Qualitäts- und Originalitätssiche­ rung erreicht: With these flip-flop / vacuum sealing membranes at the same time a guarantee of quality and originality achieved:  

  • 1. Beim Abziehen der induktiv aufgesiegelten Flip-Flop/ Vakuum-Verschlußmembranen vom Verpackunsbehälter = Zerstörung der Verpackungssicherung.1. When removing the inductively sealed flip-flop / Vacuum sealing membranes from the packaging container logo CNRS logo INIST Destruction of packaging security.
  • 2. Durch die in die Flip-Flop-Verschlußmembrane inte­ grierte Leckanzeige, welche insbesondere bei heißge­ füllten, pasteurisierten oder sterilisierten Produkt­ verpackungen aktiviert wird.2. By the inte in the flip-flop closure membrane grated leak indicator, which is particularly hot filled, pasteurized or sterilized product packaging is activated.

Fig. 3 Das erfindungsgemäße Verfahren schließt auch einen Verbund mit einer Kartonette ein. Die Verschlußmem­ bran wird z. B. mittels eines Klebers auf eine Karto­ nette kaschiert. Der so gebildete Materialverbund wird z. B. in einen Kunststoff-Schraubdeckel einge­ legt, wie dies u. a. aus Fig. 3 und Fig. 4 ersichtlich ist. Fig. 3 The method according to the invention also includes a composite with a carton. The closure membrane is z. B. laminated nice with a glue on a box. The material composite thus formed is z. B. incorporated in a plastic screw cap defines, as inter alia from Fig. 3 and Fig. 4 is visible.

Die induktive (Hf) Siegelung erfolgt durch den mit dem Behälter verschraubten Deckel hindurch, wobei die induzierten Wirbelströme, entsprechend dem er­ findungsgemäßen Verfahren, lediglich den Induktions- "<Ring" bzw. nur die eigentliche Siegelfläche erregen.The inductive (HF) sealing is carried out by the screwed through the container lid, whereby the induced eddy currents, according to which he inventive method, only the induction "<Ring" or only excite the actual sealing surface.

Fig. 4 Es ist durchaus denkbar, die Flip-Flop/Vakuumver­ schlußmembrane gemäß Fig. 2 in Kombination mit einer Kartonette entsprechend Fig. 3 für kaltgefüllte, pul­ verige oder pastöse Produkte einzusetzen, wenn durch den Abfüllprozeß, z. B. bei Instantprodukten (Pulver­ kaffee etc.), im Behälterkopfraum ein atmosphärischer Unterdruck entsteht und dadurch das erfindungsgemäße Flip-Flop-System aktiviert wird. Fig. 4 It is quite conceivable to use the flip-flop / vacuum closing membrane according to FIG. 2 in combination with a cardboard box according to FIG. 3 for cold-filled, pulverous or pasty products if through the filling process, e.g. B. in instant products (coffee powder, etc.), an atmospheric negative pressure is created in the container head space and the flip-flop system according to the invention is activated.

Fig. 5 Erst durch den erfindungsgemäß auf die Siegelfläche begrenzten Metallanteil (Induktions-"Ring") in den Verschlußmembranen ist es möglich, die Hochfrequenz- Siegeltechnik energetisch und wirtschaftlich richtig zu nutzen. Fig. 5 It is only through the metal portion (induction "ring") limited in the sealing membranes according to the invention that it is possible to use the high-frequency sealing technology energetically and economically correctly.

Durch die über den Induktions-"Ring" auf die eigent­ liche Siegelzone begrenzte metallische Fläche wird das Standard-Streufeld der induzierten Wirbelströme eliminiert und damit die eingebrachte Energie konzen­ triert für die zu versiegelnde Fläche genutzt.By using the induction "ring" on the actual sealing area becomes a limited metallic surface the standard stray field of the induced eddy currents eliminated and thus concentrate the energy introduced used for the surface to be sealed.

Der erfindungsgemäß außerhalb der Siegelzone liegende metallfreie Bereich schafft gleichzeitig die Voraus­ setzungen für einen ökologischen und ökonomischen, pro­ duktspezifischen Materialeinsatz bis hin zu elastisch verformbaren Werkstoffen zur Herstellung von Flip- Flop/Vakuum-Verschlußmembranen.The one lying outside the sealing zone according to the invention metal-free area creates the advance at the same time setting for an ecological and economic, pro product-specific use of materials up to elastic deformable materials for the production of flip Flop / vacuum sealing membranes.

Claims (9)

1. Verfahren zur Hochfrequenz-Versiegelung von Behältern aus Glas, Kunststoff oder anderen nichtmetallischen Ma­ terialien mittels Verschlußmembranen aus nichtmetall­ ischen Werkstoffen, wobei für das Hochfrequenzversiegeln die Verschlußmembranen mit einer Metallschicht, insbeson­ dere aus Aluminium, versehen werden, dadurch gekennzeich­ net, daß die Verschlußmembranen lediglich im Bereich der Siegelfläche mit der Metallschicht versehen werden.1. A method for high-frequency sealing of containers made of glass, plastic or other non-metallic materials by means of sealing membranes made of non-metallic materials, the sealing membranes being provided with a metal layer, in particular aluminum, for the high-frequency sealing, characterized in that the sealing membranes only be provided with the metal layer in the area of the sealing surface. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Verschlußmembranen außerhalb der Siegelfläche trans­ parent ausgebildet werden.2. The method according to claim 1, characterized in that the sealing membranes trans. outside the sealing surface be trained as a parent. 3. Verfahren nach Anspruch 1 und 2, dadurch gekennzeichnet, daß die Verschlußmembranen außerhalb der Siegelfläche aus elastisch verformbarem Material hergestellt werden.3. The method according to claim 1 and 2, characterized in that the sealing membranes outside the sealing surface be made of elastically deformable material. 4. Verfahren nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die Verschlußmembranen aus mehrlagigem Verbundmate­ rial hergestellt werden.4. The method according to claim 1 to 3, characterized in that the sealing membranes made of multi-layer composite material rial are manufactured. 5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch ge­ kennzeichnet, daß die Verschlußmembranen außerhalb des Zentrums aus Steifigkeitsgründen mit zusätzlichen Ver­ steifungssegmenten versehen werden.5. The method according to any one of claims 1 to 4, characterized ge indicates that the sealing membranes outside the Center for reasons of rigidity with additional ver stiffening segments are provided. 6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß eine Unterbahn mit integrierten Vakuumkanälen im Zen­ trum eingearbeitet wird. 6. The method according to claim 5, characterized in that a subway with integrated vacuum channels in the Zen is incorporated.   7. Verfahren gemäß einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Verschlußmembranen als Flip- Flop/Vakuum-Membranen zur Dichtigkeitskontrolle aus­ gebildet werden.7. The method according to any one of claims 1 to 6, characterized characterized in that the sealing membranes as flip Flop / vacuum membranes for tightness control be formed. 8. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Verschlußmembranen in Ver­ schlußdeckel eingelegt werden.8. The method according to any one of claims 1 to 7, characterized characterized in that the sealing membranes in Ver end cover are inserted. 9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß die Verschlußmembranen mittels eines Klebers auf eine Kartonschicht kaschiert werden.9. The method according to claim 8, characterized in that the sealing membranes on an adhesive Cardboard layer are laminated.
DE4020371A 1990-06-27 1990-06-27 Sealing of glass and plastics containers - involves use of metallic layer and induction ring Expired - Fee Related DE4020371C1 (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0548838A2 (en) * 1991-12-23 1993-06-30 Cpc International Inc. Tamper evident container closure
EP0628493A1 (en) * 1993-06-08 1994-12-14 Toppan Printing Co., Ltd. Inner sealing material
DE4400179A1 (en) * 1994-01-05 1995-07-13 Audentec Ges Fuer Automatisier System for verifying presence of vacuum in drinks or food container
DE29600706U1 (en) * 1996-01-17 1996-03-07 Tettauer Glashuettenwerke Ag Glass containers for packaging products
WO1997036965A1 (en) * 1996-03-29 1997-10-09 Lambda Technologies, Inc. Conductive insert for bonding components with microwave energy
US5798395A (en) * 1994-03-31 1998-08-25 Lambda Technologies Inc. Adhesive bonding using variable frequency microwave energy
EP0943553A1 (en) * 1997-07-11 1999-09-22 A.K. Technical Laboratory, Inc., Hermetic seal and wide-mouthed bottle sealed by the seal
WO2002064432A2 (en) * 2001-02-15 2002-08-22 Portola Packaging Limited Closures and containers in combination therewith and also methods of bonding a closure to a container
EP2206655A2 (en) 2009-01-09 2010-07-14 Weener Plastik AG Lid for closing a container opening, packaging with a container and such a lid and method for sealing a container with such a lid
WO2011135292A1 (en) * 2010-04-27 2011-11-03 Obrist Closures Switzerland Gmbh A seal
US8631977B2 (en) 2009-06-02 2014-01-21 Weener Plastik Gmbh Closure for a container
US8770428B2 (en) 2009-05-19 2014-07-08 Weener Plastik Gmbh Lid for closing an opening of a container, packaging including a container with such a lid and process for sealing a container with such a lid
DE102013011481A1 (en) 2013-07-10 2015-01-15 Weener Plastik Gmbh Lid for a container, packaging with a container and such a lid and method for sealing a container with such a lid

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DE1978557U (en) * 1967-10-10 1968-02-08 United Glass Ltd DEVICE FOR SEALING A CONTAINER WITH A MEMBRANE.
US3715856A (en) * 1971-08-19 1973-02-13 Borel J & Co Packaging method
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DE1978557U (en) * 1967-10-10 1968-02-08 United Glass Ltd DEVICE FOR SEALING A CONTAINER WITH A MEMBRANE.
DE2237322A1 (en) * 1971-08-12 1973-02-15 Graalfs E PLASTIC CONTAINER AND PROCEDURE FOR ITS SEALING
US3715856A (en) * 1971-08-19 1973-02-13 Borel J & Co Packaging method

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0548838A2 (en) * 1991-12-23 1993-06-30 Cpc International Inc. Tamper evident container closure
EP0548838A3 (en) * 1991-12-23 1993-09-08 Cpc International Inc. Tamper evident container closure
EP0628493A1 (en) * 1993-06-08 1994-12-14 Toppan Printing Co., Ltd. Inner sealing material
DE4400179A1 (en) * 1994-01-05 1995-07-13 Audentec Ges Fuer Automatisier System for verifying presence of vacuum in drinks or food container
DE4400179C2 (en) * 1994-01-05 1998-04-23 Audentec Ges Fuer Automatisier Device for checking containers
US5798395A (en) * 1994-03-31 1998-08-25 Lambda Technologies Inc. Adhesive bonding using variable frequency microwave energy
US5804801A (en) * 1994-03-31 1998-09-08 Lambda Technologies, Inc. Adhesive bonding using variable frequency microwave energy
DE29600706U1 (en) * 1996-01-17 1996-03-07 Tettauer Glashuettenwerke Ag Glass containers for packaging products
WO1997036965A1 (en) * 1996-03-29 1997-10-09 Lambda Technologies, Inc. Conductive insert for bonding components with microwave energy
US6312548B1 (en) 1996-03-29 2001-11-06 Lambda Technologies Conductive insert for bonding components with microwave energy
EP0943553A4 (en) * 1997-07-11 2000-07-26 A K Tech Lab Inc Hermetic seal and wide-mouthed bottle sealed by the seal
EP0943553A1 (en) * 1997-07-11 1999-09-22 A.K. Technical Laboratory, Inc., Hermetic seal and wide-mouthed bottle sealed by the seal
WO2002064432A2 (en) * 2001-02-15 2002-08-22 Portola Packaging Limited Closures and containers in combination therewith and also methods of bonding a closure to a container
WO2002064432A3 (en) * 2001-02-15 2002-12-19 Portola Packaging Ltd Closures and containers in combination therewith and also methods of bonding a closure to a container
EP2206655A2 (en) 2009-01-09 2010-07-14 Weener Plastik AG Lid for closing a container opening, packaging with a container and such a lid and method for sealing a container with such a lid
DE102009004235A1 (en) 2009-01-09 2010-07-15 Weener Plastik Ag Cover for closing a container opening, packaging with a container and such a lid and method for sealing a container with such a lid
DE102009004235B4 (en) * 2009-01-09 2015-10-29 Weener Plastik Gmbh Cover for closing a container opening, packaging with a container and such a lid and method for sealing a container with such a lid
US8770428B2 (en) 2009-05-19 2014-07-08 Weener Plastik Gmbh Lid for closing an opening of a container, packaging including a container with such a lid and process for sealing a container with such a lid
US8631977B2 (en) 2009-06-02 2014-01-21 Weener Plastik Gmbh Closure for a container
WO2011135292A1 (en) * 2010-04-27 2011-11-03 Obrist Closures Switzerland Gmbh A seal
US9211978B2 (en) 2010-04-27 2015-12-15 Obrist Closures Switzerland Gmbh Seal
DE102013011481A1 (en) 2013-07-10 2015-01-15 Weener Plastik Gmbh Lid for a container, packaging with a container and such a lid and method for sealing a container with such a lid
DE102013011481B4 (en) * 2013-07-10 2020-11-26 Weener Plastik Gmbh Lid for a container, packaging with a container and such a lid as well as a method for sealing a container with such a lid

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