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EP3741701B1 - Method of manufacturing a metallic can lid - Google Patents

Method of manufacturing a metallic can lid Download PDF

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Publication number
EP3741701B1
EP3741701B1 EP20185471.8A EP20185471A EP3741701B1 EP 3741701 B1 EP3741701 B1 EP 3741701B1 EP 20185471 A EP20185471 A EP 20185471A EP 3741701 B1 EP3741701 B1 EP 3741701B1
Authority
EP
European Patent Office
Prior art keywords
sealing
lid
metallic
opening
closure unit
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.)
Active
Application number
EP20185471.8A
Other languages
German (de)
French (fr)
Other versions
EP3741701A1 (en
Inventor
Gregor Anton Piech
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.)
Top Cap Holding GmbH
Original Assignee
Top Cap Holding GmbH
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 to PL20185471.8T priority Critical patent/PL3741701T3/en
Priority to FIEP20185471.8T priority patent/FI3741701T3/en
Priority to HRP20230200TT priority patent/HRP20230200T1/en
Priority to EP20185471.8A priority patent/EP3741701B1/en
Priority to SI201830864T priority patent/SI3741701T1/en
Priority to LTEP20185471.8T priority patent/LT3741701T/en
Priority to ES20185471T priority patent/ES2935714T3/en
Priority to PT201854718T priority patent/PT3741701T/en
Priority to DK20185471.8T priority patent/DK3741701T3/en
Priority to RS20230091A priority patent/RS64047B1/en
Application filed by Top Cap Holding GmbH filed Critical Top Cap Holding GmbH
Priority to HUE20185471A priority patent/HUE061227T2/en
Publication of EP3741701A1 publication Critical patent/EP3741701A1/en
Application granted granted Critical
Publication of EP3741701B1 publication Critical patent/EP3741701B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B65D17/4014—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 and provided with attached means for reclosing or resealing
    • 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
    • B65D17/404—Details of the lines of weakness
    • 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
    • B65D2517/001—Action for opening container
    • B65D2517/0013—Action for opening container pull-out tear panel, e.g. by means of a tear-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
    • B65D2517/0031—Reclosable openings
    • B65D2517/004—Reclosable openings by means of an additional element
    • 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
    • B65D2517/0059—General cross-sectional shape of container end panel
    • B65D2517/0064—General cross-sectional shape of container end panel inverted U-shaped
    • 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
    • B65D2517/0082—Coated or laminated metal

Definitions

  • the present invention relates to a metal can lid with a resealable opening, in particular for beverage cans and for containers for storing food and other liquid, pasty, powdered and/or solid products.
  • the plastic closure part comprises a base part to be connected to the flanged edge of the can opening, in which base part an opening closed by a flat stopper is formed.
  • the flat stopper is connected to the edge of the opening via a plastic tear seam, so that the flat stopper connected to a tear-off tab can be detached from the plastic base part by exerting a pull on the tear-off tab and can be pivoted into an opening location.
  • the opening can be temporarily closed again by pressing in the flat stopper, which is preferably conical on its underside.
  • Resealable can lids are also, for example, in DE 10 2010 013 531 A1 , the DE 10 2015 112 428 A1 and the EP 2 354 022 B1 described.
  • U.S. 2018/016058 A1 discloses a resealable can lid having a collar portion and a lid receiving portion, each made of plastic and engageable with one another by a latching device, and a method according to the preamble of claim 1.
  • the DE 10 2006 020 696 A1 discloses a process for producing a coated thermoplastic material in which an adhesion promoter is added to a thermoplastic melt in the plastic state.
  • both the sealing frame with the fixed lid surface and the closing unit with the metal lid area that can be swung up are bonded using an adhesion promoter that is preferably suitable for food and/or has lubricating properties, in particular adhesive lacquer, in particular by a thermal process the adhesion promoter is added to the respective plastic material before the sealing frame and/or the closing unit is formed.
  • an adhesion promoter that is preferably suitable for food and/or has lubricating properties, in particular adhesive lacquer, in particular by a thermal process the adhesion promoter is added to the respective plastic material before the sealing frame and/or the closing unit is formed.
  • the adhesion promoter can be added to a plastic granulate that is used to produce a plastic injection molded part. A separate application of the adhesion promoter to the parts mentioned is not necessary, which means that the production costs can be reduced.
  • the can lid 1 shown in the figures consists of metal, in particular aluminum, and has a resealable opening.
  • a cover area 3 that can be swung up is provided in the cover in addition to a fixed cover surface 2 .
  • the flip-up lid portion 3 is separated from the fixed lid portion 2 by a circumferential micro-gap 4 or line of weakness (see in particular 6 ).
  • a sealing frame 5 made of plastic material enclosing the opening area is connected to the fixed cover surface 2, in particular by a so-called hot melt method using an adhesion promoter to ensure a firm connection with the aluminum of the cover.
  • a closing unit 6 is connected to the metal lid area 3 that can be swung up, which is also made of plastic and is pivotably attached to the fixed lid surface 2 via a pivot bearing 7 .
  • the swivel bearing 7 and the closing unit 6 are in turn connected to the fixed cover surface 2 or the cover area 3 that can be swung up, in particular via a hot melt connection using an adhesion promoter.
  • the closing unit On the side diametrically opposite the pivot bearing 7 , the closing unit is connected to a ripping member 8 that can be swung up and is arranged parallel to the top side 9 of the lid when it is not swung up.
  • the ripping member 8 is ring-shaped in a known manner and can be pivoted up about a pivot bearing 11 by engaging a finger in an engagement end 10 opposite the cover surface.
  • the sealing frame 5 and the closing unit 6 work together in a sealing manner via sealing and latching ribs 12, 13, 14 on the sealing frame 5 and associated receiving grooves 15, 16, 17 on the closing unit 6. As a result, at least three sealing edges 18, 19, 20 are formed, through which the opening area of the can lid is sealed. Even if a microgap 4 is used between the cover area 3 that can be swung up and the fixed cover area 2, the tightness of the can cover is thereby ensured.
  • the can lid 1 is provided with a micro gap 4. This is overlapped by the closing unit 6 , a first sealing area 26 being formed between the closing unit 6 and the cover area 3 that can be swung up and a second sealing area 27 between the closing unit 6 and the fixed cover area 2 .
  • the first sealing area is designed in such a way that the closing unit 6 is connected to the cover area 3 that can be swung up and cannot be torn open.
  • the second sealing area 27 is designed in such a way that it can be detached from the fixed lid area 2 when the can lid 1 is torn open with a predetermined maximum force.
  • the maximum force is preferably ⁇ 10 N, in particular ⁇ 5 N.
  • Both sealing areas 26, 27 are formed all the way around the opening portion of the can lid so that the inside of the can is completely sealed by these two sealing portions.
  • the sealing in the first sealing area 26 and in the second sealing area 27 is preferably carried out cohesively by a thermal process, in particular by a so-called hot melt process.
  • the shape of the sealing surfaces 26, 27 is as in 14 shown, preferably drop-shaped.
  • the Figures 8 to 10 show a further variant of a can lid according to the invention with a first sealing area 26 between the closing unit 6 and the lid section 3 that can be pivoted up and a second sealing area 27 between the closing unit 6 and the fixed lid section 2, which are each designed in accordance with the previous variant.
  • the difference from the previous variant is that instead of a micro-gap 4, here a weakening line 4' is provided between the fixed cover area 2 and the cover area 3 that can be swung up.
  • the weakening line 4' is designed as a sharp-edged notch.
  • the variant shown is also provided with a weakening line 4" between the fixed lid area 2 and the lid area 3 that can be pivoted up. Unlike the previous variant, this is designed as a deep-drawn deformation.
  • the weakening line 4" is also overlapped by the closing unit 6, with a first sealing area 26 between the closing unit 6 and the cover area 3 that can be swung up and a second sealing area 27 is provided between the closing unit 6 and the fixed cover area 2 .
  • the rest of the configuration is again the same as in the previously described variants.
  • a plastic part 28 is inserted into a slot 29 provided in the can lid 1 .
  • the microgap 4 adjoins the two narrow ends of the elongated hole 29 in each case.
  • the plastic part 28 is deformed in the shape of a mushroom in order to overlap the fixed cover area 2 on the one hand and the cover area 3 that can be swung up on the other hand on both sides. 15 shows the undeformed state.
  • the mushroom-shaped plastic part 28 is materially connected to the can lid 1, in particular by a thermal process using an adhesion promoter.
  • a weakening line 30 is also embossed into the plastic part 28 and is preferably produced during the sealing process of the can end 1 . This weakening line 30 allows the plastic part to be separated into two parts when the can lid is torn open. The opening forces are lower here than without the plastic part 28.
  • the inside of the can lid is laminated with a plastic film 25 which covers the entire inside of the lid.
  • the plastic film can also be ring-shaped and extend only a few tenths of a millimeter, in particular 3 to 4 tenths of a millimeter, beyond the microgap 4 or the weakening line on both sides.
  • Another possibility is to use a disk-shaped sealing film that extends radially outwards beyond the microgap 4 or the weakening line by a few tenths of a millimeter, for example 3 to 4 tenths of a millimeter.
  • the sealing foil can be designed as a largely flat disk. Both the ring-shaped and the disc-shaped sealing foil are preferably designed as a stamped part.
  • the inside of the end can deviate from the exemplary embodiment also be at least largely free of laminations and the like.
  • the inside of the lid can be provided with a lacquer layer, in particular one suitable for use with food, in order to prevent the goods in the can from coming into contact with the metal lid material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Description

Die vorliegende Erfindung betrifft einen metallischen Dosendeckel mit einer wiederverschließbaren Öffnung, insbesondere für Getränkedosen sowie für Behältnisse zur Aufbewahrung von Lebensmitteln und sonstigen flüssigen, pastösen, pulverförmigen und/oder festen Produkten.The present invention relates to a metal can lid with a resealable opening, in particular for beverage cans and for containers for storing food and other liquid, pasty, powdered and/or solid products.

Aus der EP 1 607 341 A1 ist ein Dosendeckel mit einer wiederverschließbaren Öffnung bekannt, bei dem in dem metallischen Dosendeckel eine Öffnung eingebracht und der Rand dieser Öffnung umgebördelt ist, um eine Verankerungsmöglichkeit für ein vorgefertigtes Kunststoff-Verschlussteil zu schaffen. Das Kunststoff-Verschlussteil umfasst ein mit dem Bördelrand der Dosenöffnung zu verbindendes Basisteil, in dem eine durch einen Flachstopfen verschlossene Öffnung ausgebildet ist. Der Flachstopfen ist mit dem Öffnungsrand über eine Kunststoff-Reißnaht verbunden, so dass der mit einer Aufreißlasche verbundene Flachstopfen durch Zugausübung über die Aufreißlasche von dem Kunststoff-Basisteil gelöst und in eine Öffnungsstelle verschwenkt werden kann. Die Öffnung kann durch Eindrücken des an seiner Unterseite vorzugsweise konisch ausgebildeten Flachstopfens wieder vorübergehend verschlossen werden.From the EP 1 607 341 A1 a can end with a resealable opening is known in which an opening is made in the metal can end and the edge of this opening is crimped to provide an anchoring possibility for a prefabricated plastic closure part. The plastic closure part comprises a base part to be connected to the flanged edge of the can opening, in which base part an opening closed by a flat stopper is formed. The flat stopper is connected to the edge of the opening via a plastic tear seam, so that the flat stopper connected to a tear-off tab can be detached from the plastic base part by exerting a pull on the tear-off tab and can be pivoted into an opening location. The opening can be temporarily closed again by pressing in the flat stopper, which is preferably conical on its underside.

Wiederverschließbare Dosendeckel sind ferner beispielsweise in der DE 10 2010 013 531 A1 , der DE 10 2015 112 428 A1 und der EP 2 354 022 B1 beschrieben.Resealable can lids are also, for example, in DE 10 2010 013 531 A1 , the DE 10 2015 112 428 A1 and the EP 2 354 022 B1 described.

Die US 2018/016058 A1 offenbart einen wiederverschließbaren Dosendeckel mit einem Kragenteil und einem Deckelaufnahmeteil, die jeweils aus Kunststoff gefertigt sind und über eine Rasteinrichtung miteinander koppelbar sind, und ein Verfahren gemäß dem Oberbegriff des Anspruchs 1.the U.S. 2018/016058 A1 discloses a resealable can lid having a collar portion and a lid receiving portion, each made of plastic and engageable with one another by a latching device, and a method according to the preamble of claim 1.

Die DE 10 2006 020 696 A1 offenbart ein Verfahren zur Herstellung eines beschichteten Thermoplastmaterials, bei dem einer Thermoplast-Schmelze im plastischen Zustand ein Haftvermittler zugegeben wird.the DE 10 2006 020 696 A1 discloses a process for producing a coated thermoplastic material in which an adhesion promoter is added to a thermoplastic melt in the plastic state.

Aufgabe der Erfindung ist es, ein Verfahren zur Herstellung eines wiederverschließbaren Dosendeckels anzugeben, der besonders günstig ist.It is the object of the invention to provide a method for producing a resealable can lid which is particularly economical.

Diese Aufgabe wird gelöst durch ein Verfahren mit den Merkmalen des Anspruchs 1.This object is achieved by a method having the features of claim 1.

Zur Herstellung eines metallischen Dosendeckels gemäß der Erfindung, bei welchem sowohl der Dichtungsrahmen mit der festen Deckelfläche als auch die Verschließeinheit mit dem hochschwenkbaren metallischen Deckelbereich unter Verwendung eines bevorzugt lebensmitteltauglichen und/oder Schmiereigenschaften aufweisenden Haftvermittlers, insbesondere Haftlacks, insbesondere durch ein thermisches Verfahren, stoffschlüssig verbunden wird, wird der Haftvermittler vor der Ausformung des Dichtungsrahmens und/oder der Verschließeinheit dem jeweiligen Kunststoffmaterial beigemengt. Insbesondere kann der Haftvermittler einem Kunststoffgranulat beigemengt werden, welches zur Herstellung eines Kunststoffspritzgießteils verwendet wird. Eine separate Aufbringung des Haftvermittlers auf die genannten Teile entfällt dadurch, wodurch die Herstellungskosten gesenkt werden können.For the production of a metallic can lid according to the invention, in which both the sealing frame with the fixed lid surface and the closing unit with the metal lid area that can be swung up are bonded using an adhesion promoter that is preferably suitable for food and/or has lubricating properties, in particular adhesive lacquer, in particular by a thermal process the adhesion promoter is added to the respective plastic material before the sealing frame and/or the closing unit is formed. In particular, can the adhesion promoter can be added to a plastic granulate that is used to produce a plastic injection molded part. A separate application of the adhesion promoter to the parts mentioned is not necessary, which means that the production costs can be reduced.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird nachfolgend beschrieben. Es zeigen, jeweils in schematischer Darstellung,

Fig. 1
eine perspektivische Ansicht eines erfindungsgemäßen Dosendeckels,
Fig. 2
eine Draufsicht auf die Oberseite des Dosendeckels von Fig. 1,
Fig. 3
einen Schnitt gemäß Linie A-A in Fig. 2,
Fig. 4
einen Schnitt gemäß Linie B-B in Fig. 2,
Fig. 5
einen Schnitt entsprechend Fig. 4 durch eine Variante eines erfindungsgemäßen Dosendeckels,
Fig. 6
Detail B von Fig. 5,
Fig. 7
Detail C von Fig. 5,
Fig. 8
einen Schnitt entsprechend Fig. 4 durch eine weitere Variante eines erfindungsgemäßen Dosendeckels,
Fig. 9
Detail B von Fig. 8,
Fig. 10
Detail C von Fig. 9,
Fig. 11
einen Schnitt entsprechend Fig. 4 durch noch eine Variante eines erfindungsgemäßen Dosendeckels,
Fig. 12
Detail B von Fig. 11,
Fig. 13
Detail C von Fig. 12,
Fig. 14
eine Draufsicht auf den Öffnungsbereich eines erfindungsgemäßen Dosendeckels,
Fig. 15
ein in einen erfindungsgemäßen Dosendeckel eingesetztes Kunststoffteil,
Fig. 16
das Kunststoffteil von Fig. 15 nach einer pilzförmigen Verformung,
Fig. 17
eine Draufsicht auf den Ausschnitt eines erfindungsgemäßen Dosendeckels,
Fig. 18
einen Schnitt gemäß Linie B-B in Fig. 17,
Fig. 19
einen Schnitt gemäß Linie C-C in Fig. 17, und
Fig. 20
einen Schnitt gemäß Linie D-D in Fig. 17.
An embodiment of the invention is shown in the drawing and is described below. It shows, each in a schematic representation,
1
a perspective view of a can lid according to the invention,
2
a plan view of the top of the can lid of FIG 1 ,
3
a cut according to line AA in 2 ,
4
a cut according to line BB in 2 ,
figure 5
a cut accordingly 4 by a variant of a can lid according to the invention,
6
Detail B of figure 5 ,
7
Detail C of figure 5 ,
8
a cut accordingly 4 by a further variant of a can lid according to the invention,
9
Detail B of 8 ,
10
Detail C of 9 ,
11
a cut accordingly 4 by another variant of a can lid according to the invention,
12
Detail B of 11 ,
13
Detail C of 12 ,
14
a plan view of the opening area of a can end according to the invention,
15
a plastic part used in a can end according to the invention,
16
the plastic part of 15 after a mushroom-shaped deformation,
17
a top view of the section of a can lid according to the invention,
18
a cut according to line BB in 17 ,
19
a cut according to line CC in 17 , and
20
a cut according to line DD in 17 .

Der in den Figuren dargestellte Dosendeckel 1 besteht aus Metall, insbesondere Aluminium, und weist eine wiederverschließbare Öffnung auf. Dafür ist im Deckel neben einer festen Deckelfläche 2 ein hochschwenkbarer Deckelbereich 3 vorgesehen. Der hochschwenkbare Deckelbereich 3 ist von dem festen Deckelbereich 2 durch einen umlaufenden Mikrospalt 4 oder eine Schwächungslinie getrennt (siehe insbesondere Fig. 6).The can lid 1 shown in the figures consists of metal, in particular aluminum, and has a resealable opening. For this purpose, a cover area 3 that can be swung up is provided in the cover in addition to a fixed cover surface 2 . The flip-up lid portion 3 is separated from the fixed lid portion 2 by a circumferential micro-gap 4 or line of weakness (see in particular 6 ).

Mit der festen Deckefläche 2 ist ein den Öffnungsbereich umschließender Dichtungsrahmen 5 aus Kunststoffmaterial verbunden, und zwar insbesondere durch ein sogenanntes Hot Melt Verfahren unter Verwendung eines Haftvermittlers, um eine feste Verbindung mit dem Aluminium des Deckels zu gewährleisten. Mit dem hochschwenkbaren metallischen Deckelbereich 3 ist des Weiteren eine Verschließeinheit 6 verbunden, die ebenfalls aus Kunststoff besteht und über ein Schwenklager 7 schwenkbar an der festen Deckelfläche 2 angebracht ist. Das Schwenklager 7 und die Verschließeinheit 6 sind wiederum insbesondere über eine Hot Melt Verbindung unter Verwendung eines Haftvermittlers mit der festen Deckelfläche 2 bzw. dem hochschwenkbaren Deckelbereich 3 verbunden.A sealing frame 5 made of plastic material enclosing the opening area is connected to the fixed cover surface 2, in particular by a so-called hot melt method using an adhesion promoter to ensure a firm connection with the aluminum of the cover. Furthermore, a closing unit 6 is connected to the metal lid area 3 that can be swung up, which is also made of plastic and is pivotably attached to the fixed lid surface 2 via a pivot bearing 7 . The swivel bearing 7 and the closing unit 6 are in turn connected to the fixed cover surface 2 or the cover area 3 that can be swung up, in particular via a hot melt connection using an adhesion promoter.

An der dem Schwenklager 7 diametral gegenüberliegenden Seite ist die Verschließeinheit mit einem hochschwenkbaren Aufreißorgan 8 verbunden, welches im nicht hochgeschwenkten Zustand parallel zur Deckeloberseite 9 angeordnet ist. Das Aufreißorgan 8 ist in bekannter Weise ringförmig ausgebildet und durch Eingriffnahme mit einem Finger in ein Eingriffende 10 gegenüber der Deckelfläche um ein Schwenklager 11 hochschwenkbar.On the side diametrically opposite the pivot bearing 7 , the closing unit is connected to a ripping member 8 that can be swung up and is arranged parallel to the top side 9 of the lid when it is not swung up. The ripping member 8 is ring-shaped in a known manner and can be pivoted up about a pivot bearing 11 by engaging a finger in an engagement end 10 opposite the cover surface.

Der Dichtungsrahmen 5 und die Verschließeinheit 6 wirken über Dicht- und Rastrippen 12, 13, 14 am Dichtungsrahmen 5 und zugehörige Aufnahmenuten 15, 16, 17 an der Verschließeinheit 6 dichtend zusammen. Dadurch werden mindestens drei Dichtkanten 18, 19, 20 gebildet, durch welche der Öffnungsbereich des Dosendeckels abgedichtet ist. Auch bei Verwendung eines Mikrospalts 4 zwischen dem hochschwenkbaren Deckelbereich 3 und dem festen Deckelbereich 2 ist dadurch eine Dichtigkeit des Dosendeckels gewährleistet.The sealing frame 5 and the closing unit 6 work together in a sealing manner via sealing and latching ribs 12, 13, 14 on the sealing frame 5 and associated receiving grooves 15, 16, 17 on the closing unit 6. As a result, at least three sealing edges 18, 19, 20 are formed, through which the opening area of the can lid is sealed. Even if a microgap 4 is used between the cover area 3 that can be swung up and the fixed cover area 2, the tightness of the can cover is thereby ensured.

Bei dem Ausführungsbeispiel der Fig. 5 bis 7 ist der Dosendeckel 1 mit einem Mikrospalt 4 versehen. Dieser wird von der Verschließeinheit 6 übergriffen, wobei ein erster Siegelbereich 26 zwischen der Verschließeinheit 6 und dem hochschwenkbaren Deckelbereich 3 sowie ein zweiter Siegelbereich 27 zwischen der Verschließeinheit 6 und dem festen Deckelbereich 2 ausgebildet ist. Der erste Siegelbereich ist derart ausgestaltet, dass die Verschließeinheit 6 aufreißfest mit dem hochschwenkbaren Deckelbereich 3 verbunden ist. Dagegen ist der zweite Siegelbereich 27 so ausgebildet, dass er beim Aufreißen des Dosendeckels 1 mit einer vorgegebenen Maximalkraft von dem festen Deckelbereich 2 lösbar ist. Die Maximalkraft ist dabei bevorzugt ≤ 10 N, insbesondere ≤ 5 N. Beide Siegelbereiche 26, 27 sind um den Öffnungsbereich des Dosendeckels vollständig umlaufend ausgebildet, so dass das Innere der Dose vollständig durch diese beiden Siegelbereiche abgedichtet ist.In the embodiment of Figures 5 to 7 the can lid 1 is provided with a micro gap 4. This is overlapped by the closing unit 6 , a first sealing area 26 being formed between the closing unit 6 and the cover area 3 that can be swung up and a second sealing area 27 between the closing unit 6 and the fixed cover area 2 . The first sealing area is designed in such a way that the closing unit 6 is connected to the cover area 3 that can be swung up and cannot be torn open. In contrast, the second sealing area 27 is designed in such a way that it can be detached from the fixed lid area 2 when the can lid 1 is torn open with a predetermined maximum force. The maximum force is preferably ≦10 N, in particular ≦5 N. Both sealing areas 26, 27 are formed all the way around the opening portion of the can lid so that the inside of the can is completely sealed by these two sealing portions.

Die Versiegelung im ersten Siegelbereich 26 und im zweiten Siegelbereich 27 erfolgt bevorzugt stoffschlüssig durch ein thermisches Verfahren, insbesondere durch ein sogenanntes Hot Melt-Verfahren. Die Form der Siegelflächen 26, 27 ist, wie in Fig. 14 dargestellt, bevorzugt tropfenförmig.The sealing in the first sealing area 26 and in the second sealing area 27 is preferably carried out cohesively by a thermal process, in particular by a so-called hot melt process. The shape of the sealing surfaces 26, 27 is as in 14 shown, preferably drop-shaped.

Die Fig. 8 bis 10 zeigen eine weitere Variante eines erfindungsgemäßen Dosendeckels mit einem ersten Siegelbereich 26 zwischen der Verschließeinheit 6 und dem hochschwenkbaren Deckelbereich 3 sowie einem zweiten Siegelbereich 27 zwischen der Verschließeinheit 6 und dem festen Deckelbereich 2, die jeweils entsprechend der vorhergehenden Variante ausgebildet sind. Der Unterschied zu der vorhergehenden Variante besteht darin, dass anstelle eines Mikrospalts 4 hier eine Schwächungslinie 4' zwischen dem festen Deckelbereich 2 und dem hochschwenkbaren Deckelbereich 3 vorgesehen ist. Die Schwächungslinie 4' ist dabei als scharfkantige Kerbe ausgebildet.the Figures 8 to 10 show a further variant of a can lid according to the invention with a first sealing area 26 between the closing unit 6 and the lid section 3 that can be pivoted up and a second sealing area 27 between the closing unit 6 and the fixed lid section 2, which are each designed in accordance with the previous variant. The difference from the previous variant is that instead of a micro-gap 4, here a weakening line 4' is provided between the fixed cover area 2 and the cover area 3 that can be swung up. The weakening line 4' is designed as a sharp-edged notch.

Bei der in den Fig. 11 bis 13 gezeigten Variante ist ebenfalls zwischen dem festen Deckelbereich 2 und dem hochschwenkbaren Deckelbereich 3 eine Schwächungslinie 4" vorgesehen. Diese ist anders als bei der vorhergehenden Variante als tiefgezogene Verformung ausgebildet. Die Schwächungslinie 4" wird ebenfalls von der Verschließeinheit 6 übergriffen, wobei ein erster Siegelbereich 26 zwischen der Verschließeinheit 6 und dem hochschwenkbaren Deckelbereich 3 und ein zweiter Siegelbereich 27 zwischen der Verschließeinheit 6 und dem festen Deckelbereich 2 vorgesehen ist. Die übrige Ausgestaltung ist wieder wie bei den zuvor beschriebenen Varianten.At the in the Figures 11 to 13 The variant shown is also provided with a weakening line 4" between the fixed lid area 2 and the lid area 3 that can be pivoted up. Unlike the previous variant, this is designed as a deep-drawn deformation. The weakening line 4" is also overlapped by the closing unit 6, with a first sealing area 26 between the closing unit 6 and the cover area 3 that can be swung up and a second sealing area 27 is provided between the closing unit 6 and the fixed cover area 2 . The rest of the configuration is again the same as in the previously described variants.

Bei der in den Figuren 15 bis 20 dargestellten Variante ist ein Kunststoffteil 28 in ein im Dosendeckel 1 vorgesehenes Langloch 29 eingesetzt. An den beiden schmalen Enden des Langlochs 29 schließt jeweils der Mikrospalt 4 an. Wie in Fig. 16 gut zu sehen, wird das Kunststoffteil 28 pilzförmig verformt, um einerseits den festen Deckelbereich 2 und andererseits den hochschwenkbaren Deckelbereich 3 beidseits zu übergreifen. Fig. 15 zeigt den unverformten Zustand.At the in the Figures 15 to 20 variant shown, a plastic part 28 is inserted into a slot 29 provided in the can lid 1 . The microgap 4 adjoins the two narrow ends of the elongated hole 29 in each case. As in 16 It is easy to see that the plastic part 28 is deformed in the shape of a mushroom in order to overlap the fixed cover area 2 on the one hand and the cover area 3 that can be swung up on the other hand on both sides. 15 shows the undeformed state.

Das pilzförmig verformte Kunststoffteil 28 ist stoffschlüssig mit dem Dosendeckel 1 verbunden, insbesondere durch ein thermisches Verfahren unter Verwendung eines Haftvermittlers. In das Kunststoffteil 28 ist außerdem eine Schwächungslinie 30 eingeprägt, die bevorzugt während des Siegelprozesses des Dosendeckels 1 hergestellt wird. Durch diese Schwächungslinie 30 kann das Kunststoffteil beim Aufreißen des Dosendeckels in zwei Teile aufgetrennt werden. Die Öffnungskräfte sind hierbei geringer als ohne das Kunststoffteil 28.The mushroom-shaped plastic part 28 is materially connected to the can lid 1, in particular by a thermal process using an adhesion promoter. A weakening line 30 is also embossed into the plastic part 28 and is preferably produced during the sealing process of the can end 1 . This weakening line 30 allows the plastic part to be separated into two parts when the can lid is torn open. The opening forces are lower here than without the plastic part 28.

Bei dem in den Fig. 3 und 4 dargestellten Ausführungsbeispiel ist die Innenseite des Dosendeckels mit einer Kunststofffolie 25 laminiert, welche die gesamte Deckelinnenseite abdeckt. Abweichend hiervon kann die Kunststofffolie auch ringförmig ausgebildet sein und nur um wenige Zehntel Millimeter, insbesondere 3 bis 4 Zehntel Millimeter, beidseits über den Mikrospalt 4 oder die Schwächungslinie hinaus reichen. Eine andere Möglichkeit besteht darin, eine scheibenförmige Dichtungsfolie zu verwenden, die um wenige Zehntel Millimeter, beispielsweise 3 bis 4 Zehntel Millimeter radial nach außen über den Mikrospalt 4 bzw. die Schwächungslinie hinaus reicht. Die Dichtungsfolie kann in diesem Fall als weitgehend flache Scheibe ausgebildet sein. Sowohl die ringförmige als auch die scheibenförmige Dichtungsfolie sind bevorzugt als Stanzteil ausgebildet.At the in the Figures 3 and 4 illustrated embodiment, the inside of the can lid is laminated with a plastic film 25 which covers the entire inside of the lid. Deviating from this, the plastic film can also be ring-shaped and extend only a few tenths of a millimeter, in particular 3 to 4 tenths of a millimeter, beyond the microgap 4 or the weakening line on both sides. Another possibility is to use a disk-shaped sealing film that extends radially outwards beyond the microgap 4 or the weakening line by a few tenths of a millimeter, for example 3 to 4 tenths of a millimeter. In this case, the sealing foil can be designed as a largely flat disk. Both the ring-shaped and the disc-shaped sealing foil are preferably designed as a stamped part.

Während auf der Außenseite des Dosendeckels 1 stets der Dichtungsrahmen 5 und die Verschließeinheit 6 angebracht und über einen Haftvermittler mit dem Dosendeckel verbunden sind, kann die Deckelinnenseite abweichend von dem Ausführungsbeispiel auch zumindest weitgehend frei von Laminierungen und dergleichen sein. Die Deckelinnenseite kann aber mit einer insbesondere lebensmitteltauglichen Lackschicht versehen sein, um einen Kontakt des in der Dose befindlichen Gutes mit dem metallischen Deckelmaterial zu verhindern.While the sealing frame 5 and the closing unit 6 are always attached to the outside of the can end 1 and connected to the can end via an adhesion promoter, the inside of the end can deviate from the exemplary embodiment also be at least largely free of laminations and the like. However, the inside of the lid can be provided with a lacquer layer, in particular one suitable for use with food, in order to prevent the goods in the can from coming into contact with the metal lid material.

Die in den Fig. 5 bis 13 dargestellten Ausführungsbeispiele zeigen Dosendeckel ohne Dichtungsfolie. Durch die Siegelbereiche 26 und 27 sowie die Dicht- und Rastrippen 12, 13 und 14 mit den zugehörigen Aufnahmenuten 15, 16, 17 ist trotzdem eine Dichtheit des Dosendeckels sowie eine Verschlussfestigkeit gewährleistet.The in the Figures 5 to 13 illustrated embodiments show can lids without sealing film. The sealing areas 26 and 27 as well as the sealing and locking ribs 12, 13 and 14 with the associated receiving grooves 15, 16, 17 nevertheless ensure that the can lid is leak-tight and that the closure is secure.

BezugszeichenlisteReference List

11
Dosendeckelcan lid
22
fester Deckelbereichfixed lid area
33
hochschwenkbarer Deckelbereichlift-up lid area
44
Mikrospaltmicrogap
4', 4"4', 4"
Schwächungslinieline of weakness
55
Dichtungsrahmensealing frame
66
Verschließeinheitcapping unit
77
Schwenklagerswivel bearing
88th
Aufreißorganripping organ
99
Deckeloberseitelid top
1010
Eingriffendeintervention end
1111
Schwenklager von 8Swivel bearing from 8
1212
Dicht- und RastrippeSealing and locking rib
1313
Dicht- und RastrippeSealing and locking rib
1414
Dicht- und RastrippeSealing and locking rib
1515
Aufnahmenutreceiving groove
1616
Aufnahmenutreceiving groove
1717
Aufnahmenutreceiving groove
1818
Dichtkantesealing edge
1919
Dichtkantesealing edge
2020
Dichtkantesealing edge
2121
Hakenhook
2222
Vorsprunghead Start
2323
Durchbrechungbreakthrough
2424
Fortsatzextension
2525
Dichtungsfoliesealing foil
2626
erster Siegelbereichfirst seal area
2727
zweiter Siegelbereichsecond seal area
2828
Kunststoffteilplastic part
2929
LanglochLong hole
3030
Schwächungslinieline of weakness

Claims (1)

  1. A method of manufacturing a metallic can end having a reclosable opening, in particular for beverage cans and for containers for storing foodstuffs and other liquid, pasty, powdery, or solid products, the metallic can end having a microgap (4) or a weakening line (4', 4"), which is provided in the metallic end surface and is peripheral around the opening, having a sealing frame (5) composed of plastic material connected to the fixed end surface (2) and surrounding the opening region, having a closure unit (6) composed of plastic material that is connected to the upwardly pivotable metallic end region (3), which is disposed within the microgap (4) or the weakening line (4', 4"), that is pivotably attached to the fixed end surface (2) via a pivot bearing (7) and that is preferably provided with a tear-open member (8) which is diametrically opposite the pivot bearing (7) and which is connected to the closure unit (6) in an upwardly pivotable manner, wherein the sealing frame (5) and the closure unit (6) cooperate in a sealing manner, preferably via sealing and latching ribs (12, 13, 14) and associated reception grooves (15, 16, 17), and the metallic end region (3) disposed within the peripheral microgap (4) or the weakening line (4', 4") is received and held in the opening region of the end (1), wherein the sealing frame (5) is bonded to the fixed end surface (2) and the closure unit (6) is bonded to the upwardly pivotable metallic end region (3), in particular by a thermal process, using a bonding agent, in particular an adhesive lacquer, that is preferably suitable for use in foodstuffs and/or has lubrication properties, characterized in that the bonding agent is admixed to the respective plastic material, in particular a plastic granulate for manufacturing an injection molded plastic part, before the molding of the sealing frame (5) and/or of the closure unit (6).
EP20185471.8A 2018-06-19 2018-06-19 Method of manufacturing a metallic can lid Active EP3741701B1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
HRP20230200TT HRP20230200T1 (en) 2018-06-19 2018-06-19 Method of manufacturing a metallic can lid
EP20185471.8A EP3741701B1 (en) 2018-06-19 2018-06-19 Method of manufacturing a metallic can lid
SI201830864T SI3741701T1 (en) 2018-06-19 2018-06-19 Method of manufacturing a metallic can lid
LTEP20185471.8T LT3741701T (en) 2018-06-19 2018-06-19 Method of manufacturing a metallic can lid
ES20185471T ES2935714T3 (en) 2018-06-19 2018-06-19 Procedure for manufacturing a metal can lid
PT201854718T PT3741701T (en) 2018-06-19 2018-06-19 Metallic can lid
PL20185471.8T PL3741701T3 (en) 2018-06-19 2018-06-19 Method of manufacturing a metallic can lid
FIEP20185471.8T FI3741701T3 (en) 2018-06-19 2018-06-19 Method of manufacturing a metallic can lid
RS20230091A RS64047B1 (en) 2018-06-19 2018-06-19 Method of manufacturing a metallic can lid
HUE20185471A HUE061227T2 (en) 2018-06-19 2018-06-19 Method of manufacturing a metallic can lid
DK20185471.8T DK3741701T3 (en) 2018-06-19 2018-06-19 METHOD FOR MANUFACTURING A METALLIC CAN LID

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP20185471.8A EP3741701B1 (en) 2018-06-19 2018-06-19 Method of manufacturing a metallic can lid
EP18178571.8A EP3584187A1 (en) 2018-06-19 2018-06-19 Metallic can lid

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP18178571.8A Division EP3584187A1 (en) 2018-06-19 2018-06-19 Metallic can lid

Publications (2)

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EP3741701A1 EP3741701A1 (en) 2020-11-25
EP3741701B1 true EP3741701B1 (en) 2022-12-14

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ID=62712890

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EP20185471.8A Active EP3741701B1 (en) 2018-06-19 2018-06-19 Method of manufacturing a metallic can lid
EP18178571.8A Withdrawn EP3584187A1 (en) 2018-06-19 2018-06-19 Metallic can lid
EP21203171.0A Withdrawn EP3981702A1 (en) 2018-06-19 2019-06-17 Metallic can lid
EP19731963.5A Pending EP3790807A1 (en) 2018-06-19 2019-06-17 Metallic can lid

Family Applications After (3)

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EP18178571.8A Withdrawn EP3584187A1 (en) 2018-06-19 2018-06-19 Metallic can lid
EP21203171.0A Withdrawn EP3981702A1 (en) 2018-06-19 2019-06-17 Metallic can lid
EP19731963.5A Pending EP3790807A1 (en) 2018-06-19 2019-06-17 Metallic can lid

Country Status (25)

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US (1) US11878835B2 (en)
EP (4) EP3741701B1 (en)
JP (1) JP7224380B2 (en)
KR (1) KR102539968B1 (en)
CN (1) CN112424075B (en)
AR (1) AR115591A1 (en)
AU (1) AU2019289694B2 (en)
CA (1) CA3102898C (en)
DK (1) DK3741701T3 (en)
EA (1) EA202190063A1 (en)
ES (1) ES2935714T3 (en)
FI (1) FI3741701T3 (en)
HR (1) HRP20230200T1 (en)
HU (1) HUE061227T2 (en)
LT (1) LT3741701T (en)
MA (1) MA52576A (en)
MX (1) MX2020013444A (en)
PL (1) PL3741701T3 (en)
PT (1) PT3741701T (en)
RS (1) RS64047B1 (en)
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KR102539968B1 (en) 2023-06-02
CA3102898C (en) 2023-07-25
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EP3790807A1 (en) 2021-03-17
HRP20230200T1 (en) 2023-03-31
CA3102898A1 (en) 2019-12-26
SI3741701T1 (en) 2023-04-28
ES2935714T3 (en) 2023-03-09
TW202000540A (en) 2020-01-01
JP2021527599A (en) 2021-10-14
US11878835B2 (en) 2024-01-23
WO2019243254A1 (en) 2019-12-26
PL3741701T3 (en) 2023-04-11
MX2020013444A (en) 2021-02-26
RS64047B1 (en) 2023-04-28
LT3741701T (en) 2023-03-10
UY38267A (en) 2020-01-31
EP3584187A1 (en) 2019-12-25
DK3741701T3 (en) 2023-01-23
US20210253300A1 (en) 2021-08-19
MA52576A (en) 2021-03-17
ZA202007443B (en) 2024-01-31
AU2019289694A1 (en) 2021-01-07
EA202190063A1 (en) 2021-03-29
BR112020025254A2 (en) 2021-03-09
TWI729413B (en) 2021-06-01
EP3981702A1 (en) 2022-04-13
PT3741701T (en) 2023-01-12
JP7224380B2 (en) 2023-02-17
HUE061227T2 (en) 2023-05-28
FI3741701T3 (en) 2023-03-18
EP3741701A1 (en) 2020-11-25
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AU2019289694B2 (en) 2022-05-26
CN112424075A (en) 2021-02-26

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