EP0104548B1 - Container closure with an opening device - Google Patents

Container closure with an opening device Download PDF

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Publication number
EP0104548B1
EP0104548B1 EP83109099A EP83109099A EP0104548B1 EP 0104548 B1 EP0104548 B1 EP 0104548B1 EP 83109099 A EP83109099 A EP 83109099A EP 83109099 A EP83109099 A EP 83109099A EP 0104548 B1 EP0104548 B1 EP 0104548B1
Authority
EP
European Patent Office
Prior art keywords
layer
tear
lid
groove
plastic
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
EP83109099A
Other languages
German (de)
French (fr)
Other versions
EP0104548A2 (en
EP0104548A3 (en
Inventor
Norbert Prof Dr. Buchner
Rolf Eberspächer
Dieter Liede
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0104548A2 publication Critical patent/EP0104548A2/en
Publication of EP0104548A3 publication Critical patent/EP0104548A3/en
Application granted granted Critical
Publication of EP0104548B1 publication Critical patent/EP0104548B1/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
    • B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
    • B65D3/22—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines with double walls; with walls incorporating air-chambers; with walls made of laminated material
    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
    • B65D17/4011—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening completely by means of a tearing tab
    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
    • B65D17/4012—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening partially by means of a tearing tab
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/0058—Other details of container end panel
    • B65D2517/008—Materials of container end panel
    • B65D2517/0085—Foil-like, e.g. paper or cardboard
    • B65D2517/0088—Foil-like, e.g. paper or cardboard with plastic overmoulded onto foil

Definitions

  • a lid of this type which has become known, for example, from US Pat. No. 4,267,937 (FIG. 6), consists of a relatively thick carrier layer, molded with a thermoplastic material, with the inside of which is relatively thick thin plastic layer as a barrier and sealing layer is connected by means of a lacquer.
  • a weakening line surrounding a tear-open part is arranged in the carrier layer, which passes through the plastic layer and which is formed during molding.
  • the carrier layer is injection molded as an outer part in a mold, which is very time-consuming and expensive.
  • a plastic plate is connected as a barrier and sealing layer to the carrier layer by means of a lacquer.
  • the carrier layer and the plastic plate must be brought together in the correct position and pressed together.
  • the known lid has the disadvantage that folds form when the plastic plate is applied to the angled sealing flange of the lid, which folds can impair the gas-tightness of a container closed with such a lid.
  • a container lid with an opening part surrounded by score lines, which is formed from a metal / plastic laminate.
  • This cover has a relatively thick carrier and barrier layer made of a metal plate, with the inside of which a relatively thin plastic layer is bonded as a corrosion and protective layer.
  • the notch lines surrounding the tear-open part are stamped into the thick metal plate on this cover.
  • the well-known lid is probably stiff and tight, but it is very expensive due to its high metal content.
  • the invention has for its object to provide an easy-to-open container lid that is stiff, firm and tight and that can be easily formed from a laminate strip.
  • the container lid according to the invention with the characterizing features of claim 1 has the advantage that it can be formed in large numbers from a commercially available plastic / metal laminate strip without wrinkles by deep drawing and the weakening line delimiting the tear-open part can be produced in a simple manner.
  • the thickening in the beads on both sides of the line of weakness provides good guidance when tearing open the tear part and prevents the crack from running.
  • the lines of weakness can be pressed quickly and precisely into the plastic carrier layer using a heated notching tool before or after molding.
  • a grip tab made of a heat-sealable plastic, which is sealed to the outer carrier layer of the tear-open part, is particularly advantageous and makes it easier to tear on.
  • a packaging container with a body 10 made of a multilayer packaging material is closed at its upper opening with a lid 11 which has an easy-to-use opening device for removing the contents.
  • the fuselage 10 and lid 11 have a floor plan in the form of a square with rounded corners.
  • the cover 11 has a U-shaped edge fold 12 which engages around the opening edge of the fuselage 10 and is sealed or welded to it. It is formed by deep drawing or deep drawing.
  • a multilayer composite material is used for the production of the cover 11, which has an outer layer 14 made of plastic, a middle layer 15 made of metal, preferably aluminum, and an inner layer 16 made of a heat-sealable plastic.
  • the individual layers can be connected to one another by means of a lamination adhesive.
  • the outer layer 14, which gives the lid its stiffness and strength as a carrier layer, is about 100 to 400 microns, preferably 200 microns thick and consists of a thermoplastic such as polyvinyl chloride (PVC), polyester (PETP), polystyrene (PS), polycarbonate (PC) or the like.
  • the middle layer 15, which contributes to a high tightness of the cover consists of an aluminum or steel foil with a thickness of 20 to 40 pm.
  • the inner layer 16 which is used for heat sealing or welding to the fuselage 10 and acts as an insulating layer, has a thickness of approximately 50 ⁇ m and consists of polyethylene (PE), polypropylene (PP), polyvinylidene chloride (PVDC), polyester (PETP) or also from a heat seal lacquer.
  • PE polyethylene
  • PP polypropylene
  • PVDC polyvinylidene chloride
  • PET polyester
  • the opening device in the cover 11 has a removable tear-open part 20 which is surrounded by a line of weakness 21.
  • the tear-open part 20 can have different shapes, for example a circular area (FIG. 1) for inserting a drinking straw, teardrop shape (FIG. 2) or a full tear-open area adapted to the lid level (FIGS. 4 and 5).
  • the weakening line 21 is only arranged in the outer carrier layer 14 and passes through its thickness in the form of a notch 22 completely or almost completely.
  • the notch 22 is hot-stamped into the carrier layer 14 by means of a heated notching tool, plastic being melted and displaced under the action of pressure and heat.
  • bulges 23, 24 protruding on both sides of the notch 22 of the weakening line 21 over the plane of the upper side of the carrier layer 14 (FIGS. 2 and 6).
  • the thickening of the carrier layer 14 next to the notch 22 produced by the beads 23, 24 contributes to the fact that when the tearing part 20 breaks out or is torn out, the break runs along the weakening line 21 and does not run out of it.
  • two circular tear-open parts 20 are arranged, one of which is provided for forming a pouring opening and the other for forming a ventilation opening.
  • the diameter of the circular weakening line 21 is larger than that of a drinking straw, so that a drinking straw can be placed on the tear-open part 20 and the pull-open part 20 can be broken out of the lid mirror by applying pressure, the middle metal layer 15 and the inner plastic layer 16 being only a controllable one To offer resistance.
  • the middle metal layer 15 and the inner plastic layer 16 being only a controllable one To offer resistance.
  • it can be bulged outwards, as the exemplary embodiment according to FIG. 6 shows.
  • the tear-open part 20 has a teardrop shape.
  • a heat-sealable grip tab 25 made of a plastic plate is welded to the plastic layer 14 by means of a welding field 26 at its narrow end.
  • the line of weakness 21 runs parallel to the fold edge 12 in order to completely remove the cover mirror and additionally forms a drop-like starting section 27 to which a grip tab 29 is connected by a welding point 28.
  • the exemplary embodiment according to FIG. 1 has a rigid double lever 30 with a breaking edge 31 in the starting area as a grip tab, covering a part of the weakening line 21.
  • the double lever 30 is connected to the outer plastic layer 14 by means of a welding line 32 which forms the axis for the double lever 30 .
  • the weakening line 21 is torn inward in the region of the breaking edge 31.
  • the double lever 30 is pulled further, the entire tearing part 20 is then separated from the cover 11.
  • a composite material with three layers is specified for the production of a cover according to the invention.
  • the carrier layer consists of a thermoplastic and the melting temperature of the adjacent layer is higher than that of the carrier layer.
  • the lines of weakness can be hot stamped into the strip material used to manufacture the lids prior to forming the lids or into lids already formed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Laminated Bodies (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einem Behälterdekkel nach der Gattung des Anspruchs 1. Ein beispielsweise durch die US-PS 4267937 (Figur6) bekannt gewordener Deckel dieser Art besteht aus einer im Formgussverfahren aus einem thermoplastischen Material geformten, verhältnismässig dicken Trägerschicht, mit deren Innenseite eine verhältnismässig dünne Kunststoffschicht als Sperr- und Siegelschicht mittels eines Lackes verbunden ist. Zum leichten Öffnen des Deckels ist in der Trägerschicht eine ein Aufreissteil umgebende Schwächungslinie angeordnet, welche die Kunststoffschicht durchsetzt und welche beim Formgiessen ausgebildet wird. Ein derartiger Behälterdeckel ist durch die Art seiner Herstellung teuer. Zunächst wird nämlich die Trägerschicht als Aussenteil in einer Form spritzgegossen, was sehr zeitaufwendig und teuer ist. Sodann wird ein Kunststoffplättchen als Sperr-und Siegelschicht mit der Trägerschicht mittels eines Lackes verbunden. Dazu müssen die Trägerschicht und das Kunststoffplättchen positionsgerecht zusammengeführt und miteinander verpresst werden. Ferner hat der bekannte Dekkel den Nachteil, dass sich beim Anlegen des Kunststoffplättchens an dem abgewinkelten Siegelflansch des Deckels Falten bilden, die die Gasdichtigkeit eines mit einem solchen Deckel verschlossenen Behälters beeinträchtigen können.The invention is based on a container lid according to the preamble of claim 1. A lid of this type, which has become known, for example, from US Pat. No. 4,267,937 (FIG. 6), consists of a relatively thick carrier layer, molded with a thermoplastic material, with the inside of which is relatively thick thin plastic layer as a barrier and sealing layer is connected by means of a lacquer. For easy opening of the cover, a weakening line surrounding a tear-open part is arranged in the carrier layer, which passes through the plastic layer and which is formed during molding. Such a container lid is expensive due to the way it is manufactured. First of all, the carrier layer is injection molded as an outer part in a mold, which is very time-consuming and expensive. Then a plastic plate is connected as a barrier and sealing layer to the carrier layer by means of a lacquer. To do this, the carrier layer and the plastic plate must be brought together in the correct position and pressed together. Furthermore, the known lid has the disadvantage that folds form when the plastic plate is applied to the angled sealing flange of the lid, which folds can impair the gas-tightness of a container closed with such a lid.

Auch ist durch die DE-B-2023923 ein Behälterdeckel mit einem von Kerblinien umgebenen Aufreissteil bekannt geworden, der aus einem Metall/Kunststoff-Laminat geformt ist. Dieser Dekkel hat eine verhältnismässig dicke Träger- und Sperrschicht aus einer Metallplatte, mit deren Innenseite eine verhältnismässig dünne Kunststoffschicht als Korrosions- und Schutzschicht verklebt ist. Die den Aufreissteil umgebenden Kerblinien sind bei diesem Deckel in die dicke Metallplatte eingeprägt. Der bekannte Deckel ist wohl steif und dicht, er ist aber wegen seines hohen Metallanteils sehr teuer.Also known from DE-B-2023923 is a container lid with an opening part surrounded by score lines, which is formed from a metal / plastic laminate. This cover has a relatively thick carrier and barrier layer made of a metal plate, with the inside of which a relatively thin plastic layer is bonded as a corrosion and protective layer. The notch lines surrounding the tear-open part are stamped into the thick metal plate on this cover. The well-known lid is probably stiff and tight, but it is very expensive due to its high metal content.

Aufgabe und Lösung der ErfindungObject and solution of the invention

Der Erfindung liegt die Aufgabe zugrunde, einen leicht zu öffnenden Behälterdeckel zu schaffen, der steif, fest und dicht ist und der in einfacher Weise aus einem Laminatstreifen geformt werden kann.The invention has for its object to provide an easy-to-open container lid that is stiff, firm and tight and that can be easily formed from a laminate strip.

Vorteile der ErfindungAdvantages of the invention

Der erfindungsgemässe Behälterdeckel mit den kennzeichnenden Merkmalen des Anspruchs 1 hat den Vorteil, dass er aus einem handelsüblichen Kunststoff/Metall-Laminatstreifen in grosser Stückzahl faltenfrei durch Tiefziehen geformt und die den Aufreissteil begrenzende Schwächungslinie in einfacher Weise hergestellt werden kann. Ausserdem ergibt die Verdickung in den Wülsten beidseits der Schwächungslinie eine gute Führung beim Aufreissen des Aufreissteils und verhindert ein Verlaufen des Risses. Je nach der Konfiguration des Deckels können die Schwächungslinien vor oder nach dem Formen in die Kunststoff-Trägerschicht mit einem beheizten Kerbwerkzeug schnell und positionsgenau eingedrückt werden.The container lid according to the invention with the characterizing features of claim 1 has the advantage that it can be formed in large numbers from a commercially available plastic / metal laminate strip without wrinkles by deep drawing and the weakening line delimiting the tear-open part can be produced in a simple manner. In addition, the thickening in the beads on both sides of the line of weakness provides good guidance when tearing open the tear part and prevents the crack from running. Depending on the configuration of the cover, the lines of weakness can be pressed quickly and precisely into the plastic carrier layer using a heated notching tool before or after molding.

Durch die in den Unteransprüchen aufgeführten Massnahmen sind vorteilhafte Weiterbildungen des im Hauptanspruch angegebenen Behälterdeckels möglich. Besonders vorteilhaft ist nach Anspruch 3 eine an der äusseren Trägerschicht des Aufreissteils angesiegelte Grifflasche aus einem heisssiegelfähigen Kunststoff, mit der das Anreissen erleichtert wird.The measures listed in the subclaims permit advantageous developments of the container lid specified in the main claim. According to claim 3, a grip tab made of a heat-sealable plastic, which is sealed to the outer carrier layer of the tear-open part, is particularly advantageous and makes it easier to tear on.

Zeichnungdrawing

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen

  • Fig. 1 den oberen Teil eines Behälters mit einem Deckel in schaubildlicher Darstellung,
  • Fig. 2 einen Teil des Behälters und Deckels nach Fig. 1 in vergrössertem Massstab im Querschnitt in der Ebene 11-11 der Fig. 1,
  • Fig. 3-5 Behälterdeckel mit verschiedenen Ausbildungen der Öffnungseinrichtung in Draufsicht und
  • Fig. 6 einen Teil eines Behälterdeckels in vergrössertem Massstab im Querschnitt.
Embodiments of the invention are shown in the drawing and explained in more detail in the following description. Show it
  • 1 shows the upper part of a container with a lid in a diagrammatic representation,
  • 2 shows part of the container and lid according to FIG. 1 on an enlarged scale in cross section in the plane 11-11 of FIG. 1,
  • Fig. 3-5 container lid with different designs of the opening device in plan view and
  • Fig. 6 shows a part of a container lid on an enlarged scale in cross section.

Beschreibung der AusführungsbeispieleDescription of the embodiments

Ein Verpackungsbehälter mit einem Rumpf 10 aus einem mehrschichtigen Packstoff ist an seiner oberen Öffnung mit einem Deckel 11 verschlossen, der zum Entnehmen des Inhalts eine leicht bedienbare Öffnungseinrichtung hat. Rumpf 10 und Deckel 11 haben einen Grundriss in Gestalt eines Quadrats mit abgerundeten Ecken. Der Deckel 11 hat einen U-förmigen Randfalz 12, der den Öffnungsrand des Rumpfes 10 umgreift und mit diesem versiegelt oder verschweisst ist. Er ist durch Tiefziehen oder Tiefen geformt.A packaging container with a body 10 made of a multilayer packaging material is closed at its upper opening with a lid 11 which has an easy-to-use opening device for removing the contents. The fuselage 10 and lid 11 have a floor plan in the form of a square with rounded corners. The cover 11 has a U-shaped edge fold 12 which engages around the opening edge of the fuselage 10 and is sealed or welded to it. It is formed by deep drawing or deep drawing.

Für die Herstellung des Deckels 11 wird ein mehrschichtiger Verbundwerkstoff verwendet, der eine äussere Schicht 14 aus Kunststoff, eine mittlere Schicht 15 aus Metall, vorzugsweise Aluminium, und eine innere Schicht 16 aus einem heisssiegelbaren Kunststoff hat. Die einzelnen Schichten können mittels eines Kaschierklebers miteinander verbunden sein. Die äussere Schicht 14, die als Trägerschicht dem Deckel seine Steifigkeit und Festigkeit verleiht, ist etwa 100 bis 400 µm, vorzugsweise 200 p.m dick und besteht aus einem thermoplastischen Kunststoff wie Polyvinylchlorid (PVC), Polyester (PETP), Polystyrol (PS), Polycarbonat (PC) od. dgl. Die mittlere Schicht 15, die für eine hohe Dichtigkeit des Dekkels beiträgt, besteht aus einer Aluminium- oder Stahlfolie einer Dicke von 20 bis 40 pm. Die innere Schicht 16, die zum Heisssiegeln oder Verschweissen mit dem Rumpf 10 dient und als Isolierschicht wirkt, hat eine Dicke von etwa 50 jim und besteht aus Polyäthylen (PE), Polypropylen (PP), Polyvinylidenchlorid (PVDC), Polyester (PETP) oder auch aus einem Heisssiegellack.A multilayer composite material is used for the production of the cover 11, which has an outer layer 14 made of plastic, a middle layer 15 made of metal, preferably aluminum, and an inner layer 16 made of a heat-sealable plastic. The individual layers can be connected to one another by means of a lamination adhesive. The outer layer 14, which gives the lid its stiffness and strength as a carrier layer, is about 100 to 400 microns, preferably 200 microns thick and consists of a thermoplastic such as polyvinyl chloride (PVC), polyester (PETP), polystyrene (PS), polycarbonate (PC) or the like. The middle layer 15, which contributes to a high tightness of the cover, consists of an aluminum or steel foil with a thickness of 20 to 40 pm. The inner layer 16, which is used for heat sealing or welding to the fuselage 10 and acts as an insulating layer, has a thickness of approximately 50 μm and consists of polyethylene (PE), polypropylene (PP), polyvinylidene chloride (PVDC), polyester (PETP) or also from a heat seal lacquer.

Die Öffnungseinrichtung im Deckel 11 hat einen austrennbaren Aufreissteil 20, der von einer Schwächungslinie 21 umgeben ist. Der Aufreissteil 20 kann verschiedene Formen aufweisen, beispielsweise eine Kreisfläche (Fig. 1) zum Einsetzen eines Trinkhalms, Tropfenform (Fig. 2) oder eine dem Deckelspiegel angepasste Vollaufreissfläche (Fig. 4 und 5).The opening device in the cover 11 has a removable tear-open part 20 which is surrounded by a line of weakness 21. The tear-open part 20 can have different shapes, for example a circular area (FIG. 1) for inserting a drinking straw, teardrop shape (FIG. 2) or a full tear-open area adapted to the lid level (FIGS. 4 and 5).

Die Schwächungslinie 21 ist lediglich in der äusseren Trägerschicht 14 angeordnet und durchsetzt deren Dicke in Form einer Kerbe 22 völlig oder nahezu völlig. Die Kerbe 22 wird in die Trägerschicht 14 mittels eines beheizten Kerbwerkzeuges heissgeprägt, wobei unter der Einwirkung von Druck und Hitze Kunststoff aufschmilzt und verdrängt wird. Dabei bilden sich beidseits der Kerbe 22 der Schwächungslinie 21 über die Ebene der Oberseite der Trägerschicht 14 vorstehende Wülste 23, 24 (Fig. 2 und 6). Die durch die Wülste 23, 24 hergestellte Verdickung der Trägerschicht 14 neben der Kerbe 22 trägt dazu bei, dass beim Ausbrechen oder Ausreissen des Aufreissteils 20 der Bruch entlang der Schwächungslinie 21 läuft und nicht aus dieser verläuft.The weakening line 21 is only arranged in the outer carrier layer 14 and passes through its thickness in the form of a notch 22 completely or almost completely. The notch 22 is hot-stamped into the carrier layer 14 by means of a heated notching tool, plastic being melted and displaced under the action of pressure and heat. In this case, bulges 23, 24 protruding on both sides of the notch 22 of the weakening line 21 over the plane of the upper side of the carrier layer 14 (FIGS. 2 and 6). The thickening of the carrier layer 14 next to the notch 22 produced by the beads 23, 24 contributes to the fact that when the tearing part 20 breaks out or is torn out, the break runs along the weakening line 21 and does not run out of it.

Bei dem Ausführungsbeispiel nach Fig. 1 und 2 sind zwei kreisförmige Aufreissteile 20 angeordnet, von denen eines zum Bilden einer Ausgiess- öffnung und das andere zum Bilden einer Belüftungsöffnung vorgesehen sind. Der Durchmesser der kreisförmigen Schwächungslinie 21 ist grösser als der eines Trinkhalms, so dass ein Trinkhalm auf den Aufreissteil 20 aufgesetzt und durch Ausüben von Druck der Aufreissteil 20 aus dem Deckelspiegel ausgebrochen werden kann, wobei die mittlere Metallschicht 15 und die innere Kunststoffschicht 16 lediglich einen beherrschbaren Widerstand leisten. Zum Versteifen des Aufreissteils 20 kann dieser, wie das Ausführungsbeispiel nach Fig. 6 zeigt, nach aussen ausgewölbt sein.In the exemplary embodiment according to FIGS. 1 and 2, two circular tear-open parts 20 are arranged, one of which is provided for forming a pouring opening and the other for forming a ventilation opening. The diameter of the circular weakening line 21 is larger than that of a drinking straw, so that a drinking straw can be placed on the tear-open part 20 and the pull-open part 20 can be broken out of the lid mirror by applying pressure, the middle metal layer 15 and the inner plastic layer 16 being only a controllable one To offer resistance. In order to stiffen the tear-open part 20, it can be bulged outwards, as the exemplary embodiment according to FIG. 6 shows.

Bei dem Ausführungsbeispiel nach Fig. hat der Aufreissteil 20 eine Tropfenform. Zum Ausreissen des Aufreissteils 20 ist an dessen schmalem Ende eine heisssiegelbare Grifflasche 25 aus einem Kunststoffplättchen mittels eines Schweissfeldes 26 mit der Kunststoffschicht 14 verschweisst.In the exemplary embodiment according to FIG. 1, the tear-open part 20 has a teardrop shape. To tear off the tear-open part 20, a heat-sealable grip tab 25 made of a plastic plate is welded to the plastic layer 14 by means of a welding field 26 at its narrow end.

Beim Deckel 11 nach Fig. 4 läuft zum vollständigen Austrennen des Deckelspiegels die Schwächungslinie 21 parallel nahe dem Falzrand 12 und bildet zusätzlich einen tropfenartigen Startabschnitt 27, mit dem durch einen Schweisspunkt 28 eine Grifflasche 29 verbunden ist.In the case of the cover 11 according to FIG. 4, the line of weakness 21 runs parallel to the fold edge 12 in order to completely remove the cover mirror and additionally forms a drop-like starting section 27 to which a grip tab 29 is connected by a welding point 28.

Das Ausführungsbeispiel nach Fig. hat im Startbereich als Grifflasche einen steifen Doppelhebel 30 mit einer Brechkante 31 in Deckung mit einem Teil der Schwächungslinie 21. Der Doppelhebel 30 ist mit der äusseren Kunststoffschicht 14 mittels einer Schweisslinie 32 verbunden, die die Achse für den Doppelhebel 30 bildet. Beim Hochziehen des freien, längeren Armes 33, der dem kürzeren Arm 34 mit der Brechkante 31 gegenüberliegt, wird die Schwächungslinie 21 im Bereich der Brechkante 31 nach innen angerissen. Beim weiteren Ziehen an dem Doppelhebel 30 wird dann der gesamte Aufreissteil 20 aus dem Deckel 11 ausgetrennt.The exemplary embodiment according to FIG. 1 has a rigid double lever 30 with a breaking edge 31 in the starting area as a grip tab, covering a part of the weakening line 21. The double lever 30 is connected to the outer plastic layer 14 by means of a welding line 32 which forms the axis for the double lever 30 . When the free, longer arm 33, which is opposite the shorter arm 34 with the breaking edge 31, is pulled up, the weakening line 21 is torn inward in the region of the breaking edge 31. When the double lever 30 is pulled further, the entire tearing part 20 is then separated from the cover 11.

Vorhergehend sind einige Ausführungsbeispiele für die Gestaltung des Aufreissteils, der von der heissgekerbten Schwächungslinie umgeben ist, erläutert. Im Rahmen der Erfindung sind jedoch auch andere Gestaltungsformen möglich, darunter auch solche, bei denen die Schwächungslinie nicht in sich geschlossen ist, so dass der Aufreissteil mit dem übrigen Teil des Deckels aus Umweltschutzgründen verbunden bleibt.Some exemplary embodiments for the design of the tearing part, which is surrounded by the hot-notched weakening line, have been explained above. However, other design forms are also possible within the scope of the invention, including those in which the line of weakness is not self-contained, so that the tear-open part remains connected to the remaining part of the cover for reasons of environmental protection.

Ferner ist zur Herstellung eines Deckels nach der Erfindung ein Verbundwerkstoff mit drei Schichten angegeben. Im Rahmen der Erfindung ist jedoch auch die Verwendung von Verbundwerkstoffen mit anderem Aufbau möglich, bei dem jedoch die Trägerschicht aus einem thermoplastischen Kunststoff besteht und die Schmelztemperatur der angrenzenden Schicht höher ist als die der Trägerschicht.Furthermore, a composite material with three layers is specified for the production of a cover according to the invention. Within the scope of the invention, however, the use of composite materials with a different structure is also possible, in which, however, the carrier layer consists of a thermoplastic and the melting temperature of the adjacent layer is higher than that of the carrier layer.

Die Schwächungslinien können in das zur Herstellung der Deckel verwendete Streifenmaterial vor dem Formen der Deckel oder in bereits geformte Deckel heissgeprägt werden.The lines of weakness can be hot stamped into the strip material used to manufacture the lids prior to forming the lids or into lids already formed.

Claims (3)

1. Multi-layered container lid formed from a composite material, with an opening device and which has an outer, thick supporting layer (14) made of a thermoplastic and an inner sealing layer (16) which can be welded to the container body (10), and in which a tear-open portion (20) is at least partially surrounded by a line of weakness (21) which is designed as a groove (22) in the supporting layer, characterized in that beads (23, 24) are arranged in the supporting layer (14) on either side of the hotstamped groove (22) and rise above the level of the topside of the lid (11).
2. Container lid according to Claim 1, characterized in that the groove (22) fully or virtually fully penetrates the supporting layer (14).
3. Container lid according to one of Claims 1 or 2, characterized in that a grasping tab (25, 29, 30) is sealed onto the tear-off portion (20) surrounded by the groove (22).
EP83109099A 1982-09-23 1983-09-15 Container closure with an opening device Expired EP0104548B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3235167 1982-09-23
DE19823235167 DE3235167A1 (en) 1982-09-23 1982-09-23 CONTAINER LID WITH OPENING DEVICE

Publications (3)

Publication Number Publication Date
EP0104548A2 EP0104548A2 (en) 1984-04-04
EP0104548A3 EP0104548A3 (en) 1985-07-03
EP0104548B1 true EP0104548B1 (en) 1987-06-03

Family

ID=6173920

Family Applications (1)

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EP83109099A Expired EP0104548B1 (en) 1982-09-23 1983-09-15 Container closure with an opening device

Country Status (4)

Country Link
US (1) US4533063A (en)
EP (1) EP0104548B1 (en)
JP (1) JPS5978841A (en)
DE (2) DE3235167A1 (en)

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CN111108043B (en) * 2017-09-14 2022-02-08 A和R卡顿隆德有限公司 Transport closure, packaging container comprising a transport closure, and method for removing a transport closure from a packaging container
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Also Published As

Publication number Publication date
EP0104548A2 (en) 1984-04-04
DE3235167A1 (en) 1984-03-29
JPS5978841A (en) 1984-05-07
US4533063A (en) 1985-08-06
DE3371895D1 (en) 1987-07-09
EP0104548A3 (en) 1985-07-03

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