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EP0218096B1 - Sheet metal lid for non-circular cans, especially oblong cans with a hansa shape - Google Patents

Sheet metal lid for non-circular cans, especially oblong cans with a hansa shape Download PDF

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Publication number
EP0218096B1
EP0218096B1 EP86112196A EP86112196A EP0218096B1 EP 0218096 B1 EP0218096 B1 EP 0218096B1 EP 86112196 A EP86112196 A EP 86112196A EP 86112196 A EP86112196 A EP 86112196A EP 0218096 B1 EP0218096 B1 EP 0218096B1
Authority
EP
European Patent Office
Prior art keywords
score line
tear
beads
chord
approximately
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
EP86112196A
Other languages
German (de)
French (fr)
Other versions
EP0218096A1 (en
Inventor
Ag Schmalbach-Lubeca
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.)
Ardagh Metal Packaging Germany GmbH
Original Assignee
Schmalback Lubeca AG
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
Application filed by Schmalback Lubeca AG filed Critical Schmalback Lubeca AG
Priority to AT86112196T priority Critical patent/ATE38193T1/en
Publication of EP0218096A1 publication Critical patent/EP0218096A1/en
Application granted granted Critical
Publication of EP0218096B1 publication Critical patent/EP0218096B1/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
    • 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

Definitions

  • the invention relates to a lid made of sheet metal for non-round cans, in particular long oval cans in Hansa format with the features of the preamble of claim 1.
  • Such a cover is known from GB-A.:1 207 769.
  • the tear-off part points in the start section and in End area of the lid on differently oriented beads.
  • beads running transversely to the tear-open direction ensure that during the initial break-in and tear-open the start section can no longer bulge around an axis that runs parallel to the tear-open direction.
  • the transverse beads facilitate the unrolling of the sheet when the starting section is torn, which can more or less bend along the transverse beads.
  • the beads run parallel to the opening direction or at an acute angle to this opening direction, which prevents the sheet from unrolling in the end section of the opening part and stiffens this part like a board.
  • This is intended to facilitate and improve the safe handling of the tear-open part in the last phase of the tear-open process and during the moment in which the tear-off part is separated from the can (cf. also DE-A-2 909 076, FIG. 1).
  • Similar measures are also known for lids for cans of circular cross-section (cf. US-A-3,478,918).
  • the person opening the can must release the force on the tear-open part and bring the sheet metal to break through slight pivoting movements of the tear-open part around the chord-shaped notch line section. This automatically ensures that no greater springback capacity is stored in the tearing part at the moment of the separation process. This largely eliminates the risk of splashing the contents of the can as well as the risk of injury to the person.
  • the two outer beads of the bead group are preferably oriented towards the end points of the chord-shaped notch line section in accordance with the teaching of claim 2. In this way, the breaking process along the score line to the end points is carried out safely, since the bead ends are close to the transition point between the end points and the adjacent score line sections. At the same time, it is ensured that, even in the end point areas, deformation of the sheet during the last separation process is largely excluded.
  • the cover can be made of aluminum sheet or other thin sheet. It is a lid with a long oval outline, which is widely used for fish cans in the so-called Hansa format. It can be sheets of small thickness, in particular less than 0.24 mm.
  • the cover 1 has a flanged edge 2 which merges into the cover mirror 3 via a core wall.
  • a tearing part 6 is delimited by a self-contained score line 7, the course of which deviates from the course of the core wall.
  • the score line has a start section 8 at the left end of FIG. 2, in the vicinity of which a handle tab 5 of conventional design is fastened by means of a rivet 4 formed from the sheet metal.
  • the score line diverges from the break-open start line 8 into two straight sections 9, which delimit the entire start section 16 of the tear-open part 6.
  • two transverse beads 21, 22 are formed, which have increasing length in the tear direction.
  • a flat recess 20 of approximately square outline is provided, which is delimited by a corresponding shoulder.
  • On both sides of the depression 20 extend parallel to the two outer notch line sections 10 beads 26, 27, which run parallel to the longitudinal center line 19 of the cover and the core wall.
  • the beads 26, 27 can be arranged at substantially the same distance from the score line 10 or from the shoulder delimiting the depression 20.
  • the distance 33 between the beads 26 and 27 and the score line sections 10 is as small as possible in the preferred embodiment and corresponds at most to the bead width (31).
  • the beads 26 and 27 end in the end region 18 of the tear-open part 6 directly in the region of a transition point between the notch line sections 12 and 13, namely at a short distance of a few millimeters.
  • the score line sections 12 and 13 belong to a polygonal train of individual, straight score line sections 11, 12 and 13 which are connected via points 14 to the lateral straight score line sections 10 and determine the end region 18 of the tear-open part 6.
  • the middle section 11 of this polygonal train consists of a notch line 11 which runs in a chord-like manner with respect to the arcuate core wall and whose straight length 38 corresponds to approximately half the total width 39 of the tearing part 6.
  • the score line section 11 is at a distance from the core wall, measured on the longitudinal center line 19, which can be between 2 and 15 mm and is preferably about 10 mm.
  • the beads each having the same length 36 and the same distribution are assigned to this middle straight or chord-shaped notch line section 11 in the end region 18 of the tear-open part 6.
  • the two outer beads 25a and 25d have a mutual center distance approximately equal to the length 38 of the chord-shaped notch line section 11, that is to say that their longitudinal center lines 38a are almost flush with the end points 15 of the notch line section 11.
  • the beads preferably have a completely uniform distribution over the length 38 of the notch line section 11.
  • the bead width 31 in the preferred exemplary embodiment shown is approximately equal to the width 32 of the undeformed sheet metal region lying between adjacent beads.
  • the length 36 of the beads 25 is also the same, this length in the preferred embodiment according to FIG.
  • the beads 25 project beyond the connecting line between the transition points 14 in the direction of the starting section.
  • the beads 26 and 27 in the end region 18 of the tearing part fit harmoniously into the bead distribution of the bead group 25a to 25d.
  • the beads 25 to 27 each have the same width and the same undeformed intermediate areas.
  • the beads extend as far as possible to the polygonal score line in the end region 18 of the tearing part.
  • the distance 30 of the end products of the beads 25 to the chord-shaped notch line section 11 is between approximately 1 mm and approximately 7 mm and is preferably smaller than the width 31 of the beads and is approximately 0.5 mm to approximately 3 mm in the preferred exemplary embodiment shown.
  • the bead distribution in conjunction with the polygonal course of the score line in the end region 18 of the tear-open part 6 ensures particularly safe handling when opening when the tear-off part is detached from the rest of the cover plate. Due to the ribs and the resulting stiffening, the tear-open force is aligned parallel to the longitudinal center line 19 of the cover without special attention when opening, the tear-open process automatically ending at the end points 15 of the tendon-shaped notch line section 11, so that an unexpected resilient tearing off of the tear-off part is excluded is.
  • the final separation process is carried out extremely securely by the uniform stiffening of the cover plate, so that uniform separation is also ensured by moving the tearing part back and forth about the hinge axis formed by the tendon-shaped notch line section 11.
  • the new measures make the handling of the tear-open part much easier and more convenient when opening.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Closures For Containers (AREA)
  • Wrappers (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Image Generation (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Radiation-Therapy Devices (AREA)
  • Cultivation Receptacles Or Flower-Pots, Or Pots For Seedlings (AREA)
  • Details Of Indoor Wiring (AREA)
  • Table Devices Or Equipment (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Packages (AREA)
  • Vacuum Packaging (AREA)

Abstract

There is provided a tin lid for use with cans of oblong shape in Hansa format, which includes in its lid image section a tear-open portion defined by a self-contained recessed line capable of being broken up at one end of the lid by means of a pull-open ring attached to this end. At the other end, said recessed line includes a straight recessed line portion which extends in chordal-type fashion with respect to the core wall shaped like an arc of a circle and which is positioned perpendicular and symmetrically to the longitudinal lid center line and is further connected with the other recessed line components through an also chordal-type or polygonal recessed line connecting portion. This tear-open portion area defined by the polygonal arrangement of the recessed line, above all, is stiffened by a group of like and completely uniformly distributed beads, which are further associated with the chordal-type recessed line portion in predetermined manner, to so ensure the tear-open portion's final separation from the remaining lid section virtually without any remarkable capacity of the lid image section to undergo spring movement itself.

Description

Die Erfindung betrifft einen Deckel aus Blech für unrunde Dosen, insb. langovale Dosen im Hansaformat mit den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a lid made of sheet metal for non-round cans, in particular long oval cans in Hansa format with the features of the preamble of claim 1.

Ein solcher Deckel ist aus der GB-A.:1 207 769 bekannt. Um die Handhabung des Deckels beim Aufreissen zu erleichtern und die Gefahr des Verspritzens des Doseninhaltes oder auch einer Verletzung der Person an der Reisskante des Aufreissteils während der letzten Phase des Abtrennvorganges des Aufreissteils von der Dosen zu bannen oder zu vermindern weist der Aufreissteil im Startabschnitt und im Endbereich des Deckels unterschiedlich orientierte Sicken auf. Im Startabschnitt sorgen quer zur Aufreissrichtung verlaufende Sicken dafür, dass sich beim anfänglichen Einbrechen und Aufreissen der Startabschnitt nicht länger tonnenförmig um eine Achse aufwölben kann, die zur Aufreissrichtung parallel verläuft. Ausserdem erleichtern die quer verlaufenden Sicken beim Aufreissen des Startabschnittes das Abrollen des Bleches, das entlang der Quersicken mehr oder weniger abknicken kann. Im Endbereich dagegen verlaufen die Sicken parallel zur Aufreissrichtung oder in einem spitzen Winkel zu dieser Aufreissrichtung.Dadurch wird das Abrollen des Bleches im Endabschnitt des Aufreissteils unterbunden und dieser Teil brettartig versteift. Dadurch soll eine sichere Handhabung des Aufreissteils in der letzten Phase des Aufreissvorganges und während des Augenblicks des Abtrennens des Aufreissteils von der Dose erleichtert und verbessert werden (vgl. auch DE-A-2 909 076, Figur 1). Ähnliche Massnahmen sind auch bei Deckeln für Dosen von kreisrundem Querschnitt bekannt (vgl. US-A-3 478 918).Such a cover is known from GB-A.:1 207 769. In order to facilitate handling of the lid when tearing open and to reduce or reduce the risk of the contents of the can splashing or even an injury to the person at the tear edge of the tear-off part during the last phase of the separation process of the tear-off part from the cans, the tear-off part points in the start section and in End area of the lid on differently oriented beads. In the start section, beads running transversely to the tear-open direction ensure that during the initial break-in and tear-open the start section can no longer bulge around an axis that runs parallel to the tear-open direction. In addition, the transverse beads facilitate the unrolling of the sheet when the starting section is torn, which can more or less bend along the transverse beads. In the end area, on the other hand, the beads run parallel to the opening direction or at an acute angle to this opening direction, which prevents the sheet from unrolling in the end section of the opening part and stiffens this part like a board. This is intended to facilitate and improve the safe handling of the tear-open part in the last phase of the tear-open process and during the moment in which the tear-off part is separated from the can (cf. also DE-A-2 909 076, FIG. 1). Similar measures are also known for lids for cans of circular cross-section (cf. US-A-3,478,918).

Trotz dieser unterschiedlichen Versteifung von Startbereich und Endabschnitt des Aufreissteils von Deckeln der in Frage stehenden Art haben sich in der Praxis noch Probleme bei der Handhabung des Deckels insb. während der letzten Phase des Aufreiss- und Abtrennvorganges gezeigt. Wenn nämlich in dieser letzten Phase die beiden an den Seiten des Deckels entlanglaufenden Aufreissstellen sich dem kreisbogenförmigen Endbereich des Deckels nähern ändert sich fortlaufend die Richtung der Kerblinie von einer zur Aufreissrichtung parallelen Orientierung an den Deckelseiten bis zu einer Orientierung unter einem rechten Winkel zur Aufreissrichtung bei Erreichen des Punktes, an dem die Längsmittellinie des Deckels die Kerblinie schneidet. An diesem Punkt laufen - theoretisch - die beiden Aufreissstellen zusammen. Durch die Änderung der Richtung der Kerblinie muss zur Aufrechterhaltung des Aufreissvorganges eine immer grössere Zugkraft über die Grifflasche auf den Aufreissteil aufgebracht werden. Die Kraft ist am grössten in dem Augenblick, in dem sich der Aufreissteil endgültig von der Dose abtrennt. Der hohen Kraft entsprechend ist der Aufreissteil in diesem Augenblick stark elastisch verformt und schnellt beim Loskommen von der Dose in die entspannte Form zurück. Dies kann weiterhin zum Verspritzen des Doseninhaltes und/oder zu einer Verletzung der die Dose öffnenden Person führen. Es ist daher schon in der älteren, nicht vorveröffentlichten EP-A-0 171 650 vorgeschlagen worden, im Endbereich des Deckels den Kerblinienverlauf abweichend von dem Umriss des Deckels bzw. dem Verlauf der Kernwand zu gestalten, indem in diesem Endbereich die Kerblinie einen unsteten, polygonen Verlauf oder zumindestens einen quer zur Längsmittellinie des Deckels verlaufenden geradlinigen oder gegenüber dem bogenförmigen Verlauf des Deckelumrisses sehnenförmigen Kerblinienabschnitt vorzusehen, der über eine unstete Knickstelle in die angrenzenden Kerblinienabschnitte übergeht. Dadurch wird zwangläufig erreicht, dass die beiden Reissstellen in der letzten Phase des Aufreissvorganges an den Endpunkten des sehnenförmigen Kerblinienabschnittes zum Stillstand kommt. Ein Weiterreissen ist auch bei Erhöhung der an der Grifflasche wirkenden Aufreisskraft nicht möglich. Die die Dose öffnende Person muss vielmehr die Kraft an dem Aufreissteil nachlassen und durch leichte Schwenkbewegungen des Aufreissteils um den sehnenförmigen Kerblinienabschnitt das Blech zum Einbrechen bringen. Dadurch wird automatisch sichergestellt, dass im Augenblick des Abtrennvorganges in dem Aufreissteil kein grösseres Rückfederungsvermögen gespeichert ist. Damit wird die Gefahr eines Verspritzens des Doseninhaltes ebenso wie die Gefahr einer Verletzung der Person weitgehend ausgeschaltet.Despite this different stiffening of the start area and the end section of the tear-open part of lids of the type in question, problems in handling the lid, in particular during the last phase of the tearing and separating process, have been shown in practice. If, in this last phase, the two tear-open points running along the sides of the lid approach the arcuate end region of the lid, the direction of the score line changes continuously from an orientation parallel to the tear-open direction on the lid sides to an orientation at a right angle to the tear-open direction when reached the point at which the longitudinal center line of the lid intersects the score line. At this point - theoretically - the two tear points converge. By changing the direction of the score line, an ever greater pulling force must be applied to the tearing part via the grip tab in order to maintain the tearing process. The force is greatest at the moment when the tearing part finally separates from the can. In accordance with the high force, the tear-open part is deformed very elastically at this moment and, when it comes off, snaps back into the relaxed shape. This can also lead to splashing of the can contents and / or to injury to the person opening the can. It has therefore already been proposed in the older, not prepublished EP-A-0 171 650 to design the score line course in the end area of the cover differently from the outline of the cover or the course of the core wall, in that the score line in this end area has a discontinuous, to provide a polygonal course or at least one straight line section that runs transversely to the longitudinal center line of the cover or that is tendon-shaped with respect to the arcuate course of the cover outline, which passes over an inconsistent kink in the adjacent notch line sections. This inevitably ensures that the two tear points come to a standstill at the end points of the tendon-shaped notch line section in the last phase of the tearing process. Tearing is not possible even if the tear force acting on the grip tab is increased. Rather, the person opening the can must release the force on the tear-open part and bring the sheet metal to break through slight pivoting movements of the tear-open part around the chord-shaped notch line section. This automatically ensures that no greater springback capacity is stored in the tearing part at the moment of the separation process. This largely eliminates the risk of splashing the contents of the can as well as the risk of injury to the person.

Praktische Versuche haben ergeben, dass die bisherige Versteifung des Endbereiches des Aufreissteils bei einer sehnenförmigen oder polygonalen Ausgestaltung der Kerblinie im Endabschnitt nicht mehr voll befriedigt.Practical tests have shown that the previous stiffening of the end region of the tearing part is no longer fully satisfactory in the case of a tendon-shaped or polygonal configuration of the score line in the end section.

Es ist daher Aufgabe der Erfindung einen Deckel gemäss Oberbegriff des Anspruchs 1 so weiterzubilden, dass die Vorteile eines sehnenförmigen oder polygonalen Kerblinienabschnittes im Endbereich des Deckels noch wesentlich besser zur Geltung kommen.It is therefore an object of the invention to develop a cover according to the preamble of claim 1 in such a way that the advantages of a chord-shaped or polygonal notch line section in the end region of the cover come into play much more effectively.

Diese Aufgabe wird durch die Lehre des Anspruchs 1 gelöst.This object is achieved by the teaching of claim 1.

Diese macht sich die Ausbildung der Kerblinie gemäss dem Vorschlag der älteren EP-A-0 171 650 zunutze und passt in besonderer Weise die Versteifung des Endbereiches des Aufreissteils an den besonderen Verlauf der Kerblinie in diesem Bereich an.This takes advantage of the formation of the score line in accordance with the proposal of the older EP-A-0 171 650 and adjusts the stiffening of the end area of the tear-open part in a special way to the particular course of the score line in this area.

Aufgrund der Ausbildung und Anordnung der Sicken im Endbereich des Aufreissteils gemäss der Lehre des Anspruchs 1 wird dafür Sorge getragen, dass das Blech des Aufreissteils wenigstens über die gesamte Breite des sehnenförmigen Kerblinienabschnittes und über eine wesentliche Länge, gemessen entlang der Längsmittellinie des Deckels, eine steife, brettartige Verhaltensweise zeigt, durch die eine Verbiegung des Bleches bis unmittelbar an den geraden oder sehnenförmigen Kerblinienabschnitt heran entscheidend gemildert wird. Dadurch wird gewährleistet, dass praktisch ohne wesentliche Verbiegung dieses Bereiches die Kerblinie bis an die beiden Endpunkte des sehnenförmigen Kerblinienabschnittes zuverlässig und leicht abgeschert werden kann, so dass für den letzten Trennvorgang entlang dem geraden sehnenförmigen Kerblinienabschnitt eine sichere Handhabe über den steifen Aufreissteil erhalten wird, um durch Auf- und Abbiegen des Aufreissteils diesen endgültig und ohne Speicherung vonDue to the design and arrangement of the beads in the end region of the tear-open part according to the teaching of claim 1, care is taken to ensure that the sheet metal of the tear-open part is stiff at least over the entire width of the chord-shaped notch line section and over a substantial length, measured along the longitudinal center line of the cover , shows a board-like behavior, by means of which a bending of the sheet right up to the straight or tendon-shaped notch line section is decisively reduced. This ensures that the score line can be sheared reliably and easily up to the two end points of the tendon-shaped score line section practically without substantial bending of this area, so that for the last separation process along the straight tendon-shaped score line section a safe handling over the rigid tear-open part is obtained by opening and turning the tear-off part permanently and without saving

elastischen Verformungskräften im Aufreissteil vom restlichen Deckelblech abzutrennen. Wesentlich ist dabei die gleichförmige Versteifung über die ganze Breite des geraden sehnenförmigen Kerblinienabschnittes bis hin zu den Endpunkten dieses Kerblinienabschnittes. Nur dadurch wird ein gleichförmiges, geführtes Abtrennen durch Auf- und Abbewegung des Aufreissteils ermöglicht.separate elastic deformation forces in the tear-off section from the remaining cover plate. What is essential here is the uniform stiffening over the entire width of the straight chord-shaped notch line section up to the end points of this notch line section. This is the only way to achieve a uniform, guided separation by moving the tearing part up and down.

Bevorzugt sind die beiden äusseren Sicken der Sickengruppe gegenüber den Endpunkten des sehnenförmigen Kerblinienabschnittes gemäss der Lehre des Anspruchs 2 orientiert. Auf diese Weise wird der Aufbrechvorgang entlang der Kerblinie bis zu den Endpunkten hin sicher geführt, da die Sickenenden nahe der Übergangsstelle zwischen den Endpunkten und den angrenzenden Kerblinienabschnitten liegen. Gleichzeitig wird sichergestellt, dass auch in den Endpunktbereichen eine Verformung des Bleches beim letzten Abtrennvorgang weitgehend ausgeschlossen ist.The two outer beads of the bead group are preferably oriented towards the end points of the chord-shaped notch line section in accordance with the teaching of claim 2. In this way, the breaking process along the score line to the end points is carried out safely, since the bead ends are close to the transition point between the end points and the adjacent score line sections. At the same time, it is ensured that, even in the end point areas, deformation of the sheet during the last separation process is largely excluded.

Von vorteilhafter Wirkung ist die Bemessung der Länge der Sickengruppe in bezug auf die Länge des Endabschnittes des Aufreissteils in dem Sinne, wie dies Anspruch 3 angibt.The dimensioning of the length of the bead group in relation to the length of the end section of the tearing part is advantageous in the sense as stated in claim 3.

Die Speicherung eines Rückfederungsvermögens in dem Aufreissteils beim Öffnen wird weiterhin wesentlich gemindert, wenn man Sicken der Anordnung und Verteilung gemäss den Ansprüchen 4 und 6, vorsieht. Hierbei werden auch die aussenliegenden Bereiche des Endabschnittes des Aufreissteils in gleicher Weise versteift, wie der Bereich, der dem sehnenförmigen Kerblinienabschnitt gegenüberliegt. Diese Versteifung wird teilweise in den mittleren Deckelbereich hinein verlängert, so dass auch in diesem Bereich einer Speicherung von Federkräften entgegengewirkt wird. Dabei ist der geringstmögliche Abstand der Sicken von den seitlichen Kerblinienabschnitten besonders vorteilhaft.The storage of a resilience in the tearing part when opening is further significantly reduced if you provide beads arrangement and distribution according to claims 4 and 6. Here, the outer areas of the end section of the tear-open part are stiffened in the same way as the area opposite the tendon-shaped notch line section. This stiffening is partially extended into the middle lid area, so that storage of spring forces is also counteracted in this area. The smallest possible distance of the beads from the lateral notch line sections is particularly advantageous.

Wesentlich dabei ist die praktisch gleichförmige Versteifung über die gesamte Breite des Aufreissteils, und zwar im mittleren Bereich dieses Aufreissteils und nahe den seitlichen Kerblinienabschnitten.What is essential here is the practically uniform stiffening over the entire width of the tearing part, specifically in the central region of this tearing part and near the lateral notch line sections.

Die Erfindung wird nachfolgend anhand schematischer Zeichnungen an einem Ausführungsbeispiel näher erläutert.The invention is explained in more detail below with the aid of schematic drawings using an exemplary embodiment.

Es zeigen:

  • Fig. 1 einen Deckel gemäss der Erfindung im Längsschnitt und
  • Fig. 2 den Deckel nach Fig. 1 in Draufsicht.
Show it:
  • Fig. 1 shows a cover according to the invention in longitudinal section and
  • Fig. 2 shows the lid of FIG. 1 in plan view.

Der Deckel kann aus Aluminiumblech aber auch aus anderem dünnen Blech hergestellt sein. Es handelt sich um einen Deckel von langovalem Umriss, wie er weit verbreitet für Fischdosen im sogenannten Hansa-Format ist. Es kann sich um Bleche von geringer Dicke, insbesondere von unter 0,24 mm handeln.The cover can be made of aluminum sheet or other thin sheet. It is a lid with a long oval outline, which is widely used for fish cans in the so-called Hansa format. It can be sheets of small thickness, in particular less than 0.24 mm.

Der Deckel 1 weist einen Bördelrand 2 auf, der über eine Kernwand in den Deckelspiegel 3 übergeht. Im Deckelspiegel 3 ist ein Aufreissteil 6 durch eine in sich geschlossene Kerblinie 7 begrenzt, deren Verlauf von dem Verlauf der Kernwand abweicht. Die Kerblinie weist am linken Ende der Fig. 2 einen Startabschnitt 8 auf, in dessen Nähe mittels aus dem Blech herausgeformten Niet 4 eine Grifflasche 5 üblicher Ausbildung befestigt ist. Von der Aufbrechstartlinie 8 divergiert die Kerblinie in zwei geraden Abschnitten 9, die den gesamten Startabschnitt 16 des Aufreissteils 6 begrenzen. Im Startabschnitt sind zwei quer verlaufende Sicken 21, 22 eingeformt, die in Aufreissrichtung zunehmende Länge aufweisen.The cover 1 has a flanged edge 2 which merges into the cover mirror 3 via a core wall. In the cover mirror 3, a tearing part 6 is delimited by a self-contained score line 7, the course of which deviates from the course of the core wall. The score line has a start section 8 at the left end of FIG. 2, in the vicinity of which a handle tab 5 of conventional design is fastened by means of a rivet 4 formed from the sheet metal. The score line diverges from the break-open start line 8 into two straight sections 9, which delimit the entire start section 16 of the tear-open part 6. In the start section, two transverse beads 21, 22 are formed, which have increasing length in the tear direction.

Im zentralen Mittelfeld 17 des Aufreissteils 6 ist eine flächige Vertiefung 20 von etwa quadratischem Umriss vorgesehen, die durch eine entsprechende Schulter begrenzt ist. Beiderseits der Einsenkung 20 erstrecken sich parallel zu den beiden äusseren geraden Kerblinienabschnitten 10 Sicken 26, 27, die parallel zur Längsmittellinie 19 des Deckels und zur Kernwand verlaufen.In the central middle field 17 of the tear-open part 6, a flat recess 20 of approximately square outline is provided, which is delimited by a corresponding shoulder. On both sides of the depression 20 extend parallel to the two outer notch line sections 10 beads 26, 27, which run parallel to the longitudinal center line 19 of the cover and the core wall.

Die Länge dieser Sicken 26, 27 ist grösser als die Länge der Einsenkung 20 und als die Länge des Mittelfeldes 17 des Aufreissteils 6. Sie ragen somit um einen erheblichen Längenabschnitt in den Endbereich 18 des Aufreissteils 6.The length of these beads 26, 27 is greater than the length of the depression 20 and the length of the central field 17 of the tearing part 6. They thus protrude a considerable length into the end region 18 of the tearing part 6.

Es ist ersichtlich, dass die Sicken 26, 27 im wesentlichen in gleichen Abständen von der Kerblinie 10 bzw. von der die Einsenkung 20 begrenzenden Schulter angeordnet sein können. Der Abstand 33 zwischen den Sicken 26 und 27 und den Kerblinienabschnitten 10 ist in der bevorzugtem Ausführung so klein wie möglich und entspricht höchstens der Sickenbreite (31).It can be seen that the beads 26, 27 can be arranged at substantially the same distance from the score line 10 or from the shoulder delimiting the depression 20. The distance 33 between the beads 26 and 27 and the score line sections 10 is as small as possible in the preferred embodiment and corresponds at most to the bead width (31).

Die Sicken 26 und 27 enden im Endbereich 18 des Aufreissteils 6 unmittelbar im Bereich eines Übergangspunktes zwischen den Kerblinienabschnitten 12 und 13 und zwar im geringen Abstand von wenigen Millimetern. Die Kerblinienabschnitte 12 und 13 gehören zu einem polygonalen Zug von einzelnen, in sich geraden Kerblinienabschnitten 11, 12 und 13, welche über die Punkte 14 mit den seitlichen geraden Kerblinienabschnitten 10 verbunden sind und den Endbereich 18 des Aufreissteils 6 bestimmen. Der mittlere Abschnitt 11 dieses polygonalen Zuges besteht aus einer gegenüber der bogenförmigen Kernwand sehnenförmig verlaufenden Kerblinie 11, deren gerade Länge 38 etwa der Hälfte der Gesamtbreite 39 des Aufreissteils 6 entspricht. Der Kerblinienabschnitt 11 weist von der Kernwand einen auf der Längsmittellinie 19 gemessenen Abstand auf, der zwischen 2 und 15 mm liegen kann und bevorzugt bei etwa 10 mm liegt.The beads 26 and 27 end in the end region 18 of the tear-open part 6 directly in the region of a transition point between the notch line sections 12 and 13, namely at a short distance of a few millimeters. The score line sections 12 and 13 belong to a polygonal train of individual, straight score line sections 11, 12 and 13 which are connected via points 14 to the lateral straight score line sections 10 and determine the end region 18 of the tear-open part 6. The middle section 11 of this polygonal train consists of a notch line 11 which runs in a chord-like manner with respect to the arcuate core wall and whose straight length 38 corresponds to approximately half the total width 39 of the tearing part 6. The score line section 11 is at a distance from the core wall, measured on the longitudinal center line 19, which can be between 2 and 15 mm and is preferably about 10 mm.

Diesem mittleren geraden oder sehnenförmigen Kerblinienabschnitt 11 sind im Endbereich 18 des Aufreissteils 6 im dargestellten Beispiel 4 Sicken von jeweils gleicher Länge 36 und gleicher Verteilung zugeordnet. Die beiden äusseren Sicken 25a und 25d haben einen gegenseitigen Mittenabstand etwa gleich der Länge 38 des sehnenförmigen Kerblinienabschnittes 11, d.h., dass ihre Längsmittellinien 38a nahezu mit den Endpunkten 15 des Kerblinienabschnittes 11 fluchten. Bevorzugt haben die Sicken, wie dargestellt, eine völlige gleichmässige Verteilung über die Länge 38 des Kerblinienabschnittes 11. Dabei ist die Sickenbreite 31 in dem dargestellten bevorzugten Ausführungsbeispiel etwa gleich der Breite 32 des zwischen benachbarten Sicken liegenden unverformten Blechbereiches. Die Länge 36 der Sicken 25 ist ebenfalls gleich, wobei diese Länge bei der bevorzugten Ausführungsform nach Fig. 2 der Länge 35 des Endbereiches 18 des Aufreissteils 6 ist, gemessen parallel zur Längsmittellinie 19 des Deckels und zwischen dem sehnenförmigen Kerblinienabschnitt 11 und den Übergangspunkten 14 der Kerblinie zu den geraden seitlichen Kerblinienabschnitten 10, so dass die Sicken 25 die Verbindungslinie zwischen den Übergangspunkten 14 in Richtung zum Startabschnitt überragen. Dadurch wird die brettartige Wirkung verstärkt. Man erkennt aus Fig. 2, dass sich die Sicken 26 und 27 im Endbereich 18 des Aufreissteils harmonisch in die Sickenverteilung der Sickengruppe 25a bis 25d einordnen. Bei der bevorzugten Ausführungsform nach Fig. 2 weisen dazu die Sicken 25 bis 27 jeweils gleiche Breite und gleiche unverformte Zwischenbereiche auf.In the example shown, 4 beads each having the same length 36 and the same distribution are assigned to this middle straight or chord-shaped notch line section 11 in the end region 18 of the tear-open part 6. The two outer beads 25a and 25d have a mutual center distance approximately equal to the length 38 of the chord-shaped notch line section 11, that is to say that their longitudinal center lines 38a are almost flush with the end points 15 of the notch line section 11. As shown, the beads preferably have a completely uniform distribution over the length 38 of the notch line section 11. The bead width 31 in the preferred exemplary embodiment shown is approximately equal to the width 32 of the undeformed sheet metal region lying between adjacent beads. The length 36 of the beads 25 is also the same, this length in the preferred embodiment according to FIG. 2 being the length 35 of the end region 18 of the tear-open part 6, measured parallel to the longitudinal center line 19 of the cover and between the chord-shaped notch Line section 11 and the transition points 14 of the score line to the straight lateral score line sections 10, so that the beads 25 project beyond the connecting line between the transition points 14 in the direction of the starting section. This enhances the board-like effect. It can be seen from FIG. 2 that the beads 26 and 27 in the end region 18 of the tearing part fit harmoniously into the bead distribution of the bead group 25a to 25d. In the preferred embodiment according to FIG. 2, the beads 25 to 27 each have the same width and the same undeformed intermediate areas.

Die Sicken reichen soweit wie möglich an die polygonale Kerblinie im Endbereich 18 des Aufreissteils heran. Der Abstand 30 der Endprodukte der Sicken 25 zu dem sehnenförmigen Kerblinienabschnitt 11 liegt zwischen etwa 1 mm und etwa 7 mm und ist bevorzugt kleiner als die Breite 31 der Sicken und beträgt bei dem dargestellten bevorzugten Ausführungsbeispiel etwa 0,5 mm bis etwa 3 mm.The beads extend as far as possible to the polygonal score line in the end region 18 of the tearing part. The distance 30 of the end products of the beads 25 to the chord-shaped notch line section 11 is between approximately 1 mm and approximately 7 mm and is preferably smaller than the width 31 of the beads and is approximately 0.5 mm to approximately 3 mm in the preferred exemplary embodiment shown.

Durch die Sickenverteilung wird in Verbindung mit dem polygonalen Verlauf der Kerblinie im Endbereich 18 des Aufreissteils 6 eine besonders sichere, gegen Rückfedern beim Abtrennen des Aufreissteils vom übrigen Deckelblech wirksame Handhabung beim Öffnen gewährleistet. Durch die Rippen und die dadurch bedingte Versteifung wird ohne besondere Aufmerksamkeit beim Öffnen die Aufreisskraft parallel zur Längsmittellinie 19 des Deckels ausgerichtet, wobei automatisch der Aufreissvorgang zunächst sein Ende an den Endpunkten 15 des sehnenförmigen Kerblinienabschnittes 11 findet, so dass ein unverhofftes nachfederndes Abreissen des Aufreissteils ausgeschlossen ist. Der endgültige Abtrennvorgang wird ausserordentlich sicher durch die gleichförmige Versteifung des Deckelbleches geführt, so dass auch ein gleichförmiges Abtrennen durch hin- und herbewegen des Aufreissteils um die durch den sehnenförmigen Kerblinienabschnitt 11 gebildete Gelenkachse sichergestellt ist.The bead distribution in conjunction with the polygonal course of the score line in the end region 18 of the tear-open part 6 ensures particularly safe handling when opening when the tear-off part is detached from the rest of the cover plate. Due to the ribs and the resulting stiffening, the tear-open force is aligned parallel to the longitudinal center line 19 of the cover without special attention when opening, the tear-open process automatically ending at the end points 15 of the tendon-shaped notch line section 11, so that an unexpected resilient tearing off of the tear-off part is excluded is. The final separation process is carried out extremely securely by the uniform stiffening of the cover plate, so that uniform separation is also ensured by moving the tearing part back and forth about the hinge axis formed by the tendon-shaped notch line section 11.

Durch die neuen Massnahmen wird die Handhabung des Aufreissteils beim Öffnen wesentlich erleichtert und bequemer gestaltet.The new measures make the handling of the tear-open part much easier and more convenient when opening.

Claims (8)

1. End made of sheet metal, in particular aluminium, for non-round cans, in particular for long-oval cans of the Hansa format, having a tear-open portion (6) which extends over most of the panel area (3) defined by the end chuck wall, such tear-open portion (6) being surrounded by an endless score line (7) which runs near and parallel to the end flange on its long sides and has a starting portion (8) on one of the narrow sides of the end with a lever-shaped gripping tab (5) lying flat on and being secured to the latter near said starting portion (8), the gripping end of said tab pointing in the longitudinal direction of the end, and the tear-open portion (6) being reinforced in different ways by several beads (21, 22 and 25 - 27) or the like which are arranged approximately at right angles to the longitudinal centre line (19) in the starting portion (8) and are approximately parallel to the longitudinal centre line in the remaining portion, characterized in that the tear-open portion (6) is defined by a segment (11) of the score line on the narrow side of the end (1) opposite to the starting portion (8) which has a chord-like shape in contrast to the arc shape of the chuck wall and a length of approximately half the largest width of the tear-open portion (6), the distance of which to the end chuck wall - measured on the longitudinal centre line (19) of the end - is between 2 mm and 15 mm, and that over the total length (38) of the chord-like score line segment (11) the beads (25) which extend substantially parallel to the longitudinal centre line (19) terminate at equal distances (30) of between 1 mm and 7 mm before the chord-like score line segment (11) and that the bead width (31) is equal to the width (32) of the unformed part between the adjacent beads (25a - 25d).
2. End according to claim 1, characterized in that four beads (25a 25d) are distributed over the length (38) of the chord-like score line segment (11), the longitudinal centre lines (38a) of the two outer beads being approximately in alignment with the respective final point (15) of the chord-like score line segment (11
3. End according to claim 1, characterized in that the length (36) of the beads (25a - 25d) related to the chord-like score line segment (11) is at least equal to the length (35) - measured parallel to the longitudinal centre line (19) of the end - of the area (18) of the tear-open portion between the final points (14) and (15) of the straight score line segments (10), which are parallel to the longitudinal centre line, or to the chord-like score line segment (11) respectively, such that these beads (25a - 25d) extend in the direction towards the starting portion beyond a connecting line between the final points (14) of the score line segments (10), which are parallel to the long sides of the end.
4. End according to one of claims 1 to 3, characterized in that beads (25 - 27) of equal width and with equally wide unformed intermediate portions between adjacent beads or between the latter and the score line segments (10), which are parallel to the longitudinal centre line (19) of the end, and the bead ends being spaced approximately equally from the directly adjacent score line segment, are provided over the total width (39) of the tear-open portion (6), at least the two outer beads of which (26, 27) extending approximately to the starting portion (16) of the tear-open portion.
5. End according to one of claims 1 to 4, characterized in that the distance (30) between the ends of the beads (25) related to the chord-like score line segment (11) and this score line segment (11) is smaller than the bead width (31 ) and is preferably between approximately 0.5 and approximately 3 mm.
6. End according to claim 4 or 5, characterized in that the distance (33) between the two outer beads (26, 27) and the lateral score line segments (10) is not greater than the bead width (31), the preferred minimum distance (33) being between approximately 0.5 and approximately 3 mm.
7. End according to one of claims 4 to 6, characterized in that the chord-like score line segment (11), ), together with score line segments (12, 13) extending on either side from the ends of the chord-like score line segment (11), which are straight-lined themselves, but inclined relative to the longitudinal centre line (19) and the chord-like score line segment (11), forms a polygonal score line portion being connected with the lateral score line segments (10) which are parallel to the longitudinal centre line (19), and that the two outer beads (26, 27) each end inthe immediate vicinity of the transition point between the score line segments (12, 13) of the polygonal score line portion in the end area of the tear-open portion.
8. End according to one of claims 2 to 7, characterized in that the centre line distance of the outer two of the four identical beads (25) is approximately equal to the length (38) of the chord-like score line segment (11).
EP86112196A 1985-10-02 1986-09-03 Sheet metal lid for non-circular cans, especially oblong cans with a hansa shape Expired EP0218096B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86112196T ATE38193T1 (en) 1985-10-02 1986-09-03 LID MADE OF SHEET METAL FOR NON-ROUND CANS, ESP. LONG-VALVE CANS IN HANSA-FORMAT.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853535226 DE3535226A1 (en) 1985-10-02 1985-10-02 SHEET LID FOR UNROUNDERED CAN, ESP. LANGOVALE CAN IN HANSA FORMAT
DE3535226 1985-10-02

Publications (2)

Publication Number Publication Date
EP0218096A1 EP0218096A1 (en) 1987-04-15
EP0218096B1 true EP0218096B1 (en) 1988-10-26

Family

ID=6282606

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86112196A Expired EP0218096B1 (en) 1985-10-02 1986-09-03 Sheet metal lid for non-circular cans, especially oblong cans with a hansa shape

Country Status (17)

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US (1) US4690297A (en)
EP (1) EP0218096B1 (en)
JP (1) JPS62122945A (en)
KR (1) KR910000162B1 (en)
AT (1) ATE38193T1 (en)
AU (1) AU588359B2 (en)
BR (1) BR8604748A (en)
CA (1) CA1266625A (en)
DD (1) DD252164A5 (en)
DE (2) DE3535226A1 (en)
DK (1) DK166956B1 (en)
ES (1) ES2002174A6 (en)
IS (1) IS1367B6 (en)
NO (1) NO169113C (en)
PL (1) PL148335B3 (en)
PT (1) PT83477B (en)
SU (1) SU1431672A3 (en)

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Publication number Priority date Publication date Assignee Title
DE3430382A1 (en) * 1984-08-17 1986-02-27 Schmalbach-Lubeca AG, 3300 Braunschweig SHEET LID, INSB. LANGOVALE CAN, e.g. Hansa format
US5248053A (en) * 1990-02-02 1993-09-28 Lundgren James F Operating lever for beverage container lever operated opener
GB2242281A (en) * 1990-03-21 1991-09-25 Ford Motor Co Security test device
USD405010S (en) * 1994-11-03 1999-02-02 Schmalbach-Lubeca Ag Can lid
USD425419S (en) * 1998-09-22 2000-05-23 Weirton Steel Corporation Rigid sheet metal end closure with integral opener
USD422911S (en) * 1998-09-22 2000-04-18 Weirton Steel Corporation Rigid sheet metal end closure with integral opener
EP1529004B1 (en) * 2002-08-14 2009-12-02 Firestar AG Fuel tin
US7270246B2 (en) * 2004-08-20 2007-09-18 Stolle Machinery Company, Llc Non-circular can end with corner-mounted tab and tooling and a conversion press for providing same
FR2945794A1 (en) * 2009-05-20 2010-11-26 Impress Group Bv METAL COVER FOR A CONTAINER BODY WITH RIGIDIFICATION MOLDING (S)
NO339217B1 (en) * 2013-07-09 2016-11-14 Flaax Holding As OPENS
USD902712S1 (en) 2017-11-02 2020-11-24 O. Kleiner Ag Lid for a preserve can
FR3088914B1 (en) * 2018-11-27 2020-11-20 Ardagh Mp Group Netherlands Bv Lid for a container body, in particular for a tin can type container
FR3088913B1 (en) * 2018-11-27 2021-07-02 Ardagh Mp Group Netherlands Bv Lid for a container body, in particular for a tin can type container
GB2580900B (en) * 2019-01-23 2021-05-19 Crown Packaging Technology Inc Can end with ribs to increase panel stiffness

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US3441171A (en) * 1968-03-11 1969-04-29 Continental Can Co Easy-opening container panel structure
DE1761867C3 (en) * 1968-07-16 1979-06-07 Schmalbach-Lubeca-Gmbh, 3300 Braunschweig Tear-open lids of sheet metal, in particular for tin cans
US3478918A (en) * 1968-08-14 1969-11-18 American Can Co Full open end closure
US3591037A (en) * 1969-02-24 1971-07-06 Aluminum Co Of America Container with removable panel portion
DE1959353A1 (en) * 1969-11-26 1971-06-03 Leckermaeulchen Fischkonserven Riveted connection between the grip tab and tear-open surface of containers, cans or the like.
US3682350A (en) * 1970-02-18 1972-08-08 Dorn Co V Easy opening rectangular metal container
US3653536A (en) * 1970-08-31 1972-04-04 Aluminum Co Of America Easy opening device for a rectangular container end
US3735892A (en) * 1970-10-26 1973-05-29 American Can Co Full open end having chordal start tear score sections
DE2909076C2 (en) * 1979-03-08 1984-01-26 Schmalbach-Lubeca Gmbh, 3300 Braunschweig Menu can
DE3430382A1 (en) * 1984-08-17 1986-02-27 Schmalbach-Lubeca AG, 3300 Braunschweig SHEET LID, INSB. LANGOVALE CAN, e.g. Hansa format
DE3607402A1 (en) * 1986-03-06 1987-09-10 Schmalbach Lubeca Tear-off lid made of metal for cans

Also Published As

Publication number Publication date
IS1367B6 (en) 1989-05-25
IS3137A7 (en) 1987-04-03
JPS62122945A (en) 1987-06-04
ES2002174A6 (en) 1988-07-16
NO863909L (en) 1987-04-03
PL261616A1 (en) 1987-09-07
EP0218096A1 (en) 1987-04-15
DD252164A5 (en) 1987-12-09
AU6233686A (en) 1987-04-09
BR8604748A (en) 1987-06-30
DE3535226C2 (en) 1987-11-12
NO169113B (en) 1992-02-03
AU588359B2 (en) 1989-09-14
NO169113C (en) 1992-05-13
DK466286A (en) 1987-04-03
CA1266625A (en) 1990-03-13
JPH0329667B2 (en) 1991-04-24
US4690297A (en) 1987-09-01
KR910000162B1 (en) 1991-01-21
KR870003923A (en) 1987-05-06
PT83477B (en) 1993-01-29
DE3660999D1 (en) 1988-12-01
ATE38193T1 (en) 1988-11-15
NO863909D0 (en) 1986-10-01
PT83477A (en) 1986-11-01
SU1431672A3 (en) 1988-10-15
PL148335B3 (en) 1989-10-31
DK466286D0 (en) 1986-09-30
DK166956B1 (en) 1993-08-09
DE3535226A1 (en) 1987-04-16

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