EP0209031A1 - Can, and method and membrane for its closure - Google Patents
Can, and method and membrane for its closure Download PDFInfo
- Publication number
- EP0209031A1 EP0209031A1 EP86109223A EP86109223A EP0209031A1 EP 0209031 A1 EP0209031 A1 EP 0209031A1 EP 86109223 A EP86109223 A EP 86109223A EP 86109223 A EP86109223 A EP 86109223A EP 0209031 A1 EP0209031 A1 EP 0209031A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- membrane
- wall
- cut
- edge
- plate
- 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.)
- Granted
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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
- B65D51/00—Closures not otherwise provided for
- B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
- B65D51/20—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
- B21D51/44—Making closures, e.g. caps
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- 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
- B65D2251/00—Details relating to container closures
- B65D2251/0003—Two or more closures
- B65D2251/0006—Upper closure
- B65D2251/0018—Upper closure of the 43-type
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- 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
- B65D2251/00—Details relating to container closures
- B65D2251/0003—Two or more closures
- B65D2251/0068—Lower closure
- B65D2251/0093—Membrane
Definitions
- the invention relates to a can according to the preamble of claim 1; a method of making the can; a membrane for closing them; and finally a method and an apparatus for producing the membrane.
- the invention therefore has among other things the task of creating a can of the type mentioned, which avoids the disadvantages mentioned and can be implemented in practice. This succeeds through the measures proposed in the characterizing part of claim 1.
- a can constructed in this way is easy to manufacture and offers no problems when tearing open, but a smooth and clean covering part.
- a method is to be created with which the can can be closed in the simplest possible manner, preferably in a single work step, while achieving the desired advantages. This is done by the measures defined in the characterizing part of claim 2.
- the object of the invention is further to provide a membrane for closing cans or the like.
- Containers that can be created in one operation and still ensure easy opening by means of suitable predetermined breaking points.
- the aim is achieved in that cuts and webs are alternately formed in the wall along a circumferential line.
- a web in the membrane according to the invention is about 1 to about 30%, preferably 3 to 20%, in particular 5 to 15% of the cut long, 3, preferably 6 to about 12, in particular 8 to 10 cuts and webs depending on the diameter of the membrane are to be provided. Fewer (longer) cuts and / or shorter bars endanger the processability of the membrane when gluing into the can, since the long cuts tend to pull apart. More (shorter) cuts and / or longer bars result in bigger problems when tearing open. The right choice can easily be made by any specialist, depending in particular on the material thickness and rigidity of the membrane, and on the tolerances of the can.
- the predetermined tear line is above half the height of the wall, e.g. runs in the upper third.
- they are preferably already pre-bent and / or even weakened in their thickness - at least over a part of their width, so that they form predetermined cracking points which, when used in tension, actually maintain the sealing of the covering part tear.
- the webs have an approximately spindle-shaped cross section, for example by are squeezed or cut to zero thickness at both ends bordering the respective cuts.
- a deep-drawing stamp and egg ne die used each have a circumferential shear edge for making the cuts. At least the shear edge of a tool part is interrupted at locations that are preferably evenly distributed around the circumference.
- the membrane shows in perspective a finished (circular) membrane 14 (for a can of round cross-section).
- the membrane consists of a plate 1, the side wall 2 and the radially projecting flange 3.
- the longitudinal slots 5 which are evenly distributed on the circumference and are delimited by webs 4, are arranged.
- Sections A and B are also specified, which are shown in section in one of the corresponding drawings (FIG. 1A, FIG. 1B). It can be seen how the longitudinal slots 5 and the webs 4 are arranged.
- the material thickness of the membrane can be, for example, 40 to 60 microns.
- the deep-drawing die 6 has a shaft 7 at the top for clamping in the tool.
- the stamp itself is a wedge-like tool part that contains a drawing radius 12 on the end face l3; the cylindrical drawing edge ends in a shear edge 8. This is arranged in the areas A and can be seen from the associated section (FIG. 2A).
- the recess 9 is arranged in the regions B. Only the shear edge 8 is interrupted here, namely with a depth of about 100 microns and an inclination of 25 to 60 degrees as seen from the longitudinal axis.
- the width of the recess 9 corresponds to the desired width of a web 4.
- FIG. 3 shows the die 10. It is an annular tool which has a shear edge 11 on its inside, which may have interruptions, but which are not shown in FIG. 3. This can also be seen from the fact that sections A and B (FIGS. 3A, 3B) are identical.
- the membrane film 14 which is prepared as a flat disk, lies over the die 10.
- the hold-down 15, which is guided on the deep-drawing die 6, is designed as a ring.
- the drawing contour 12 can also be seen here, the shearing edge 8 being shown in FIG. 4 and the interruption thereof being shown by the recess 9 in FIG. 5.
- FIG. 6 and 7 show the tool in the closed position.
- the die 10 first meets the hold-down 15 in the high-bay reindeer and immediately surrounds the deep-drawing die 6.
- the membrane film 14 is now converted into the plate 1, the wall 2 and the flange 3.
- FIG. 6 shows that the finished membrane is cut open laterally is. This corresponds to position A in FIG. 1 Fig. 7, where an interruption of the cut was generated by the recess 9. This results in only an offset of the membrane film 14 in the wall 2.
- shear edges 8 and 11 have only a slight overlap, in the order of 100 to 200 microns. This ensures that the membrane can be created in one operation, at the same time cutting the longitudinal slots 5 and cranking or kinking the webs 4 and possibly even - at least partially - reducing their cross section, as a result of which the desired predetermined breaking points are formed.
- the conventional membrane according to FIG. 9 in turn suffers from the fact that the adhesion of the two membrane layers in the Coverage area (3a, 3i) should be less than in the vertical (21a, 21i) and horizontal (14a, 14i) closure area.
- the open end face 16 of the completely closed can 17 according to FIG. 10 (FIG. 10a, FIG. 10b), on the other hand, is encompassed by the now separated, circular flange 3 of the membrane 14.
- the upper end l9, l9 'of the cylindrical wall 21 is arranged from the lower end 23,23' of the inner leg of the flange 3 at a small distance a, which is chosen to be just large enough to tear the former predetermined breaking points 4 (FIG. 1) are.
- a which is chosen to be just large enough to tear the former predetermined breaking points 4 (FIG. 1) are.
- Under tensile stress there is usually a smooth tearing off, in contrast to the conventional peeling stress when opening the can, in which, as mentioned at the beginning, the inner leg of the flange 3 can often become frayed.
- a membrane other than the one according to the invention if it only has a predetermined cracking point running over the circumference of its cylindrical wall part, can also be used to produce the can according to the invention, although the membrane according to the invention is preferred because of its ease of manufacture.
- the heat-sealing layer 24 connects during the closing and tearing-off process to the inner can coating 18, of which an undamaged peripheral strip 22 is retained after the webs 4 (FIG. 1) have been torn off.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
- Containers Opened By Tearing Frangible Portions (AREA)
- Diaphragms And Bellows (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Glass Compositions (AREA)
- Prostheses (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
Description
Die Erfindung betrifft eine Dose nach dem Oberbegriff des Anspruches 1; ein Verfahren zur Herstellung der Dose; eine Membran zu ihrem Verschliessen; und schliesslich ein Verfahren und eine Vorrichtung zur Herstellung der Membran.The invention relates to a can according to the preamble of
Die eingangs erwähnte Dose ist in der Eu-A 007 487 beschrieben, in der Praxis aber nie bekannt geworden, weil das zu ihrer Herstellung angegebene Verfahren einerseits viel zu aufwendig war und andererseits gar nicht funktionierte. Es wurde dort nämlich vorgeschlagen, den Kragenteil der Verschlussmembran zuerst mittels harter Pressflächen entlang einer später als Sollbruchstelle dienenden Umfangslinie in seiner Stärke zu verringern oder zu perforieren, die Membran dann in die Dosenöffnung einzusetzen, zu erwärmen und durch Aufbringen eines radial nach aussen wirkenden, entlang oder neben der Sollbruchlinie verlaufenden Druckes den Membrankragen und den Ueberdeckungsteil voneinander zu trennen. Abgesehen von diesem komplizierten und störungsanfälligen Verfahren ergab sich in der Praxis leider nie eine wirklich vollständige Trennung der beiden Membranteile, so dass beim Oeffnen der Dose durch Aufreissen des Membrantellers immer wieder Teile des Ueberdekkungsteiles mitgezogen wurden und ausfransten. Es trat also genau der Effekt auf, der eigentlich mit der Erfindung hätte vermieden werden sollen.The can mentioned at the outset is described in Eu-A 007 487, but never became known in practice because the process specified for its production was on the one hand far too complex and on the other hand did not work at all. It was proposed there that the collar part of the sealing membrane should first be reduced in thickness or perforated by means of hard pressing surfaces along a circumferential line that would later serve as a predetermined breaking point, then the membrane could be inserted into the can opening, heated and applied by applying a radially outward direction or to separate the membrane collar and the covering part from each other in addition to the predetermined breaking line. Apart from this complicated and failure-prone process, in practice there was unfortunately never really a complete separation of the two membrane parts, so that when the can was opened, parts of the covering part were pulled along and frayed by tearing open the membrane plate. So exactly the effect occurred that should have been avoided with the invention.
Ein anderer Vorschlag ist in der DE-A 32 12 990 beschrieben, konnte aber ebenfalls in der Praxis nicht verwirklicht werden. Dort besteht die Membran aus zwei Schichten; nur die innere Schicht des Membrantellerkragens ist von dem zugehörigen Ueberdeckungsteil getrennt, während die äussere Schicht Teller und Ueberdeckungsteil unverletzt übergreift und zum Aufreissen dient. Dabei ist es so gut wie unmöglich, die Haftfestigkeit der inneren Schicht auf der Doseninnenwand mit derjenigen der beiden Folien aufeinander so abzustimmen, dass der erfindungsgemäss angestrebte Effekt erreicht wird, weil nämlich einander widersprechende Forderungen auftreten: im Tellerbereich muss die Haftung der beiden Folien aufeinander grösser sein als die Haftung des Kragens der inneren Schicht an er Doseninnenseite; im Ueberdeckungsbereich müsste es genau umgekehrt sein, damit die innere Folie die Schnittkante des Dosenrumpfes auch nach dem Aufreissen noch mit Sicherheit überdeckt.Another proposal is described in DE-A 32 12 990, but could also not be implemented in practice. There the membrane consists of two layers; only the inner layer of the membrane plate collar is separated from the associated cover part, while the outer layer overlaps the plate and cover part unharmed and is used for tearing open. It is next to impossible to determine the adhesive strength of the inner layer to coordinate the inner wall of the can with that of the two foils so that the effect sought according to the invention is achieved, because contradicting demands arise: in the plate area, the adhesion of the two foils to one another must be greater than the adhesion of the collar of the inner layer to the inside of the can; in the overlap area, it would have to be exactly the opposite, so that the inner film still covers the cut edge of the can body with certainty even after tearing.
Die Erfindung hat sich daher unter anderem die Aufgabe gestellt, eine Dose der eingangs genannten Art zu schaffen, die die genannten Nachteile vermeidet und sich in der Praxis verwirklichen lässt. Dies gelingt durch die im Kennzeichen des Anspruches 1 vorgeschlagenen Massnahmen. Eine so konstruierte Dose lässt sich leicht herstellen und bietet beim Aufreissen keine Probleme, sondern einen glatt und sauber verbleibenden Ueberdeckungsteil.
Gemäss einer weiteren Aufgabe der Erfindung soll ein Verfahren geschaffen werden, mit dem in möglichst einfacher Weise, vorzugsweise in einem einzigen Arbeitsschritt, die Dose unter Erzielung der erstrebten Vorteile verschlossen werden kann. Dies geschieht durch die im Kennzeichen des Patentanspruches 2 definierten Massnahmen.The invention therefore has among other things the task of creating a can of the type mentioned, which avoids the disadvantages mentioned and can be implemented in practice. This succeeds through the measures proposed in the characterizing part of
According to a further object of the invention, a method is to be created with which the can can be closed in the simplest possible manner, preferably in a single work step, while achieving the desired advantages. This is done by the measures defined in the characterizing part of
Aufgabe der Erfindung ist des weiteren, eine Membran zum Verschliessen von Dosen oder dgl. Behältern zu schaffen, die in einem Arbeitsgang erstellt werden kann und trotzdem ein leichtes Oeffnen durch geeignete Sollrisstellen gewährleistet. Erfindungsgemäss wird das Ziel dadurch erreicht, dass in der Wandung entlang einer Umfangslinie abwechselnd Schnitte und Stege gebildet sind.The object of the invention is further to provide a membrane for closing cans or the like. Containers that can be created in one operation and still ensure easy opening by means of suitable predetermined breaking points. According to the invention, the aim is achieved in that cuts and webs are alternately formed in the wall along a circumferential line.
Schliesslich ist es Aufgabe der Erfindung, ein Verfahren und eine Vorrichtung zur rationellen Herstellung der er findungsgemässen Membran zu schaffen, die für das Herstellen einer erfindungsgemäss verschlossenen Dose Verwendung findet.Finally, it is an object of the invention, a method and an apparatus for the rational production of the to create membrane according to the invention, which is used for producing a sealed can according to the invention.
Ein Steg in der erfindungsgemässen Membran ist etwa 1 bis etwa 30%, vorzugsweise 3 bis 20%, insbesondere 5 bis 15% des Schnittes lang, wobei je nach Durchmesser der Membran 3, vorzugsweise 6 bis etwa 12, insbesondere 8 bis 10 Schnitte und Stege vorzusehen sind. Weniger (längere) Schnitte und/oder kürzere Stege gefährden die Verarbeitbarkeit der Membran beim Einkleben in die Dose, da die langen Schnitte zum Auseinanderziehen neigen. Mehr (kürzere) Schnitte und/oder längere Stege ergeben grössere Probleme beim Aufreissen. Die richtige Wahl kann in Abhängigkeit insbesondere von der Materialdicke und -steifigkeit der Membran, sowie von den Toleranzen der Dose von jedem Fachmann leicht getroffen werden.A web in the membrane according to the invention is about 1 to about 30%, preferably 3 to 20%, in particular 5 to 15% of the cut long, 3, preferably 6 to about 12, in particular 8 to 10 cuts and webs depending on the diameter of the membrane are to be provided. Fewer (longer) cuts and / or shorter bars endanger the processability of the membrane when gluing into the can, since the long cuts tend to pull apart. More (shorter) cuts and / or longer bars result in bigger problems when tearing open. The right choice can easily be made by any specialist, depending in particular on the material thickness and rigidity of the membrane, and on the tolerances of the can.
Damit die Membran verlässlich dichtschliessend in die Dose eingesiegelt werden kann, ist es zweckmässig, wenn die Sollrisslinie über der halben Höhe der Wandung, z.B. in deren oberen Drittel verläuft. Um das Abreissen der Stege während des Einsiegelns zu erleichtern, werden sie vorzugsweise bereits vorgeknickt und/oder sogar - wenigstens über einen Teil ihrer Breite - in ihrer Dicke geschwächt, so dass sie Sollrisstellen bilden, die bei Zuganwendung auch tatsächlich unter Beibehaltung der Siegelung des Ueberdeckungsteiles reissen. Besonders zweckmässig ist es, wenn die Stege einen etwa spindelförmigen Querschnitt haben, indem sie z.B. an beiden, an die jeweiligen Schnitte grenzenden Enden, verlaufend auf die Stärke Null gequetscht oder eingeschnitten sind.So that the membrane can be reliably sealed in the can, it is advisable if the predetermined tear line is above half the height of the wall, e.g. runs in the upper third. In order to facilitate the tearing off of the webs during the sealing process, they are preferably already pre-bent and / or even weakened in their thickness - at least over a part of their width, so that they form predetermined cracking points which, when used in tension, actually maintain the sealing of the covering part tear. It is particularly expedient if the webs have an approximately spindle-shaped cross section, for example by are squeezed or cut to zero thickness at both ends bordering the respective cuts.
Um auf einfache Weise eine solche Membran mit integrierter Sollrisstelle herstellen zu können, werden nach einer weiteren Ausbildung der Erfindung ein Tiefziehstempel und ei ne Matrize verwendet, die je eine umlaufende Scherkante zur Herstellung der Schnitte aufweisen. Zumindest die Scherkante eines Werkzeugteils ist an am Umfang vorzugsweise gleichmässig verteilten Stellen unterbrochen.In order to be able to produce such a membrane with an integrated predetermined cracking point in a simple manner, according to a further embodiment of the invention, a deep-drawing stamp and egg ne die used, each have a circumferential shear edge for making the cuts. At least the shear edge of a tool part is interrupted at locations that are preferably evenly distributed around the circumference.
Anhand eines Ausführungsbeispiels sei die Erfindung näher erlätert. Es zeigen:
- Fig. 1 eine fertige Membran,
- Fig. 2 den Tiefziehstempel,
- Fig. 3 die dazugehörige Matrize,
- Fig. 4 das Werkzeug in Offenstellung im Schnittbereich
- Fig. 5 das Werkzeug in Offenstellung im Stegbereich
- Fig. 6 das Werkzeug in Schliesstellung im Schnittbereich
- Fig. 7 das Werkzeug in Schliesstellung im Stegbereich
- Fig. 8 und 9 das stirnseitige Ende einer herkömmlichen, mit Membran verschlossenen Dosenwand im Schnitt; und
- Fig. l0 im Querschnitt das stirnseitige Ende einer erfindungsgemässen Dosenwand im Bereich eines Schnittes (10a) bzw. eines Steges (10b).
- 1 shows a finished membrane,
- 2 the deep-drawing stamp,
- 3 the associated die,
- Fig. 4 shows the tool in the open position in the cutting area
- Fig. 5 shows the tool in the open position in the web area
- Fig. 6 shows the tool in the closed position in the cutting area
- Fig. 7 the tool in the closed position in the web area
- Figures 8 and 9, the front end of a conventional, sealed with membrane can wall in section. and
- Fig. 10 in cross section the front end of a can wall according to the invention in the region of a cut (10a) or a web (10b).
Die Fig. 1 zeigt perspektivisch eine fertige (kreisförmige) Membran 14 (für eine Dose runden Querschnitts). Die Membran besteht aus einem Teller 1, der seitlichen Wandung 2 sowie dem radial abstehenden Flansch 3. Im oberen Drittel der Wandung 2 sind die gleichmässig am Umfang verteilten Längsschlitze 5 angeordnet, die durch Stege 4 begrenzt sind. Ferner sind noch Abschnitte A und B angegeben, die in einer der ensprechenden Zeichnung im Schnitt dargestellt sind (Fig. lA, Fig. lB). Dabei ist ersichtlich, wie die Längsschlitze 5 und die Stege 4 angeordnet sind. Die Materialstärke der Membran kann z.b. 40 bis 60 micron betragen.1 shows in perspective a finished (circular) membrane 14 (for a can of round cross-section). The membrane consists of a
Aus Fig. 2 sind der Tiefziehstempel 6, sowie dessen Bereiche A und B ersichtlich. Der Tiefziehstempel 6 hat oben einen Schaft 7 zum Einspannen in das Werkzeug. Der Stempel selbst ist ein scheilbenartiges Werkzeugteil, das an der Stirnseite l3 im Umfang einen Ziehradius 12 enthält; die zylindrische Ziehkante endet in einer Scherkante 8. Diese ist in den Bereichen A angeordnet und aus dem dazugehörigen Schnitt (Fig. 2A) ersichtlich. In den Bereichen B ist die Ausnehmung 9 angeordnet. Es ist hier lediglich die Scherkante 8 unterbrochen und zwar mit einer Tiefen von etwas 100 micron und einer Neigung von 25 bis 60 Grad von Der Längsachse aus gesehen. Die Breite der Ausnehmung 9 entspricht der gewünschten Breite eines Steges 4.2 shows the deep-drawing
Fig. 3 stellt die Matrize 10 dar. Es handelt sich dabei um ein ringförmiges Werkzeug, das an seiner Innenseite eine Scherkante 11 aufweist, die zwar Unterbrechungen aufweisen kann, die aber in Figur 3 nicht dargestellt sind. Man sieht dies auch daran, dass die Schnitte A und B (Fig. 3A, Fig. 3B) identisch sind.3 shows the die 10. It is an annular tool which has a
Die Fig. 4 und 5 zeigen das Werkzeug in offener Stellung. Ueber der Matrize 10 liegt die Membranfolie 14, die als ebebe Scheibe vorbereitet ist. Als Ring ist der Niederhalter 15 ausgebildet, der am Tiefziehstempel 6 geführt ist. Auch hier ist die Ziehkontur 12 zu erkennen, wobei in Fig. 4 die Scherkante 8 aufgeführt und in Fig. 5 hingegen deren Unterbrechung durch die Ausnehmung 9 ersichtlich ist.4 and 5 show the tool in the open position. The
Die Fig. 6 und 7 zeigen das Werkzeug in geschlossener Stellung. Die Matrize 10 trifft beim Hochfachren zuerst auf den Niederhalter 15 und umgreift unmittelbar hernach den Tiefziehstempel 6. Die Membranfolie 14 ist nun umgewandelt in den Teller 1, die Wandung 2 und den Flansch 3. Die Fig. 6 zeigt, dass die fertige Membran seitlich aufgeschnitten ist. Dies entspricht in Fig. 1 der Stelle A. Anders in Fig. 7, wo durch die Ausnehmung 9 eine Unterbrechung des Schnittes erzeugt wurde. Dadurch ergibt sich in der Wandung 2 nur eine Kröpfung der Membranfolie 14.6 and 7 show the tool in the closed position. The die 10 first meets the hold-down 15 in the high-bay reindeer and immediately surrounds the deep-
Die Herstellung geschieht in der Weise, dass bei Schliessung des Werkzeugs vorerst Teller 1, Wandung 2 und Flansch 3 gebildet werden, gleichzeitig die Wandung 2 im Querj schnitt eine z-förmige Ausbildung erfährt und in der Endphase der Schliessbewegung durch Scherkanten 8 und 11 die Längsschlitze 5 geschnitten werden.The production takes place in such a way that
Wesentlich ist, dass die Scherkanten 8 und 11 eine nur geringfügige Ueberlappung aufweisen, und zwar in der Grössenordnung von 100 bis 200 micron. Damit ist die Gewähr gegeben, dass die Membran in einem Arbeitsgang erstellbar ist, wobei gleichzeitig die Längsschlitze 5 geschnitten und die Stege 4 gekröpft bzw. geknickt und gegebenenfalls sogar - wenigstens teilweise - in ihrem Querschnitt verringert werden, wodurch sich die gewünschten Sollrisstellen bilden.It is important that the shear edges 8 and 11 have only a slight overlap, in the order of 100 to 200 microns. This ensures that the membrane can be created in one operation, at the same time cutting the
Besonders wichtig ist jedoch die Tatsache anzusehen, dass nur ein einziger Arbeitsgang zur Herstellung dieser Membran genügt und kein weiterer Maschineneinsatz erforderlich ist. Vorhandene Werkzeuge sind gegebenenfalls durch Anbringen von Scherkanten 8 und Ausnehmungen 9 umbaubar.However, it is particularly important to consider the fact that only a single operation is sufficient to produce this membrane and no further use of machinery is required. Existing tools can optionally be converted by attaching
Eine herklömmlich verschlossene Dose gemäss Fig. 8 erreicht - wie eingangs erwähnt - keine über den Umfang im erfindungsgemässen Bereich liegende Trennung des Ueberdeckungsteiles 3 vom Verschlussteil 14.8, as mentioned at the beginning, does not achieve a wonderfully closed can according to FIG. 8 that the covering
Die herkömmliche Membran gemäss Fig. 9 wiederum leidet darunter, dass die Haftung der beiden Membranschichten im Ueberdeckungsbereich (3a,3i) geringer sein müsste als im senkrechten (21a,21i) und waagrechten (14a,14i) Verschlussbereich.The conventional membrane according to FIG. 9 in turn suffers from the fact that the adhesion of the two membrane layers in the Coverage area (3a, 3i) should be less than in the vertical (21a, 21i) and horizontal (14a, 14i) closure area.
Die offene Stirnseite 16 der fertig verschlossenen, erfindungsgemässen Dose 17 gemäss Fig. 10 (Fig. 10a, Fig. 10b) hingegen wird von dem nunmehr abgetrennten, kreisförmigen Flansch 3 der Membran 14 umgriffen. Das obere Ende l9,l9' der zylindrischen Wandung 21 ist vom unteren Ende 23,23' des innenliegenden Schenkels des Flansches 3 in einem kleinen Abstand a angeordnet, der gerade so gross gewählt ist, dass die früheren Sollrisstellen 4 (Fig. 1) gerissen sind. Unter Zugbeanspruchung erfolgt nämlich in aller Regel ein glattes Abreissen im Gegensatz zu der herkömmlichen Schälbeanspruchung beim Oeffnen der Dose, bei der es wie eingangs erwähnt oft zum Ausfransen des Innenschenkels des Flansches 3 kommen kann. Deshalb kann gegebenenfalls auch eine andere als die erfindungsgemässe Membran, soferne sie nur eine über den Umfang ihres zylindrischen Wandungsteiles verlaufende Sollrisstelle aufweist, zur Herstellung der erfindungsgemässen Dose Verwendung finden, obwohl die erfindungsgemässe Membran wegen ihrer leichten Herstellbarkeit bevorzugt ist.The
Die Heisssiegelschicht 24 verbindet sich während des Verschliess- und Abreissvorganges mit der Doseninnenbeschichtung 18, von der nach dem Abreissen der Stege 4 (Fig. 1 ein unverletzter Umfangsstreifen 22 erhalten bleibt.The heat-
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT86109223T ATE35246T1 (en) | 1985-07-10 | 1986-07-06 | CAN, AND METHOD AND MEMBRANE FOR CLOSING IT. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH2995/85A CH668754A5 (en) | 1985-07-10 | 1985-07-10 | METHOD FOR CLOSING A CAN-CONTAINER BY MEANS OF A MEMBRANE. |
CH2995/85 | 1985-07-10 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0209031A1 true EP0209031A1 (en) | 1987-01-21 |
EP0209031B1 EP0209031B1 (en) | 1988-06-22 |
Family
ID=4246282
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86109223A Expired EP0209031B1 (en) | 1985-07-10 | 1986-07-06 | Can, and method and membrane for its closure |
Country Status (12)
Country | Link |
---|---|
US (2) | US4744484A (en) |
EP (1) | EP0209031B1 (en) |
JP (1) | JPS6264730A (en) |
AT (1) | ATE35246T1 (en) |
AU (1) | AU594963B2 (en) |
CA (1) | CA1274479A (en) |
CH (1) | CH668754A5 (en) |
DE (1) | DE3660328D1 (en) |
DK (1) | DK165400C (en) |
ES (1) | ES2000657A6 (en) |
IN (1) | IN163660B (en) |
ZA (1) | ZA865110B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006092364A3 (en) * | 2005-03-01 | 2006-11-30 | Crown Packaging Technology Inc | Packaging can and method and apparatus for its manufacture |
DE102006011748B4 (en) * | 2006-03-13 | 2011-03-10 | Abro Weidenhammer Gmbh | Packaging container with a tearable sealing membrane and process for its production |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH658034A5 (en) * | 1985-04-09 | 1986-10-15 | Elpatronic Ag | TORNABLE CAN PART. |
JPH01267157A (en) * | 1988-04-07 | 1989-10-25 | Showa Denko Kk | Can-like container lid and production therefor |
ATE495984T1 (en) * | 2003-03-18 | 2011-02-15 | Werner Grabher | CAN WITH A FOIL CLOSURE |
US7757879B2 (en) * | 2005-11-29 | 2010-07-20 | Sonoco Development, Inc. | Container lid formed as a laminate having a built-in opening feature, container incorporating same, and method of making same |
US7703625B2 (en) * | 2006-11-15 | 2010-04-27 | Sonoco Development, Inc. | Container lid formed as a laminate having a built-in opening feature, container incorporating same, and method for making same |
US20080283529A1 (en) | 2007-05-17 | 2008-11-20 | Sonoco Development, Inc. | Container Lid Formed as a Laminate Having a Built-In Opening Feature, and Container Incorporating Same |
PL2052984T3 (en) * | 2007-10-25 | 2011-05-31 | Impress Group Bv | Method for preparing and forming a lid and lid |
EP2574558A1 (en) * | 2011-09-30 | 2013-04-03 | Crown Packaging Technology, Inc | Process for closing metal cans |
FR3013628B1 (en) * | 2013-11-27 | 2016-07-01 | Guillaume Sireix | METHOD FOR ASSEMBLING TUBULAR BODIES OF CARDBOARD MATERIAL WITH AN SHUTTER STRUCTURE |
Citations (4)
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---|---|---|---|---|
FR2118077A1 (en) * | 1970-12-14 | 1972-07-28 | Zeiler Ag | |
US3859942A (en) * | 1971-06-01 | 1975-01-14 | Continental Can Co | Apparatus for and method of die forming and perforating pilfer-proof band of closure caps |
EP0007487A1 (en) * | 1978-07-10 | 1980-02-06 | Del Bon, Franco | Sealed can and preformed closure element therefor, as well as method and apparatuses for manufacturing them |
DE3212990A1 (en) * | 1981-04-08 | 1982-11-04 | Weidenhammer Packungen KG GmbH & Co, 6832 Hockenheim | Process for producing a closing membrane for containers |
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US3746202A (en) * | 1971-06-01 | 1973-07-17 | Continental Can Co | Die forming and perforating pilfer-proof band of closure caps |
US3741142A (en) * | 1972-03-27 | 1973-06-26 | Procter & Gamble | Method of making a tear open closure |
GB1473828A (en) * | 1973-05-03 | 1977-05-18 | Dresser Europe Sa | Seven-segment display arrangement and liquid fuel dispensing pump embodying the same |
IN149917B (en) * | 1978-04-10 | 1982-05-29 | Akerlund & Rausing Ab | |
CH639342A5 (en) * | 1979-02-17 | 1983-11-15 | Bon F Del | Preformed closure element for sealing a can and method for its manufacture |
CH636820A5 (en) * | 1979-06-18 | 1983-06-30 | Sandherr Max Ag | CAN LOCK. |
SE429036B (en) * | 1979-12-17 | 1983-08-08 | Haustrup Plastic As | CONTAINER WITH A CLOSING PART |
US4691834A (en) * | 1982-07-12 | 1987-09-08 | Bankers Trust Company | Cap and neck structure for a wide mouth jar |
-
1985
- 1985-07-10 CH CH2995/85A patent/CH668754A5/en not_active IP Right Cessation
-
1986
- 1986-07-06 DE DE8686109223T patent/DE3660328D1/en not_active Expired
- 1986-07-06 AT AT86109223T patent/ATE35246T1/en not_active IP Right Cessation
- 1986-07-06 EP EP86109223A patent/EP0209031B1/en not_active Expired
- 1986-07-08 US US06/883,306 patent/US4744484A/en not_active Expired - Lifetime
- 1986-07-08 AU AU60010/86A patent/AU594963B2/en not_active Ceased
- 1986-07-08 DK DK325086A patent/DK165400C/en not_active IP Right Cessation
- 1986-07-09 ES ES8600216A patent/ES2000657A6/en not_active Expired
- 1986-07-09 ZA ZA865110A patent/ZA865110B/en unknown
- 1986-07-09 CA CA000513416A patent/CA1274479A/en not_active Expired - Fee Related
- 1986-07-09 IN IN506/CAL/86A patent/IN163660B/en unknown
- 1986-07-10 JP JP61162898A patent/JPS6264730A/en active Pending
-
1987
- 1987-11-25 US US07/125,370 patent/US4842468A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2118077A1 (en) * | 1970-12-14 | 1972-07-28 | Zeiler Ag | |
US3859942A (en) * | 1971-06-01 | 1975-01-14 | Continental Can Co | Apparatus for and method of die forming and perforating pilfer-proof band of closure caps |
EP0007487A1 (en) * | 1978-07-10 | 1980-02-06 | Del Bon, Franco | Sealed can and preformed closure element therefor, as well as method and apparatuses for manufacturing them |
DE3212990A1 (en) * | 1981-04-08 | 1982-11-04 | Weidenhammer Packungen KG GmbH & Co, 6832 Hockenheim | Process for producing a closing membrane for containers |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006092364A3 (en) * | 2005-03-01 | 2006-11-30 | Crown Packaging Technology Inc | Packaging can and method and apparatus for its manufacture |
US8746488B2 (en) | 2005-03-01 | 2014-06-10 | Crown Packaging Technology, Inc. | Packaging can and method and apparatus for its manufacture |
EP2143509A3 (en) * | 2005-03-01 | 2015-12-09 | Crown Packaging Technology, Inc. | Method and apparatus for manufacturing a metal can |
US9895737B2 (en) | 2005-03-01 | 2018-02-20 | Crown Packaging Technology, Inc. | Packaging can and method and apparatus for its manufacture |
DE102006011748B4 (en) * | 2006-03-13 | 2011-03-10 | Abro Weidenhammer Gmbh | Packaging container with a tearable sealing membrane and process for its production |
Also Published As
Publication number | Publication date |
---|---|
IN163660B (en) | 1988-10-22 |
CA1274479A (en) | 1990-09-25 |
US4842468A (en) | 1989-06-27 |
ZA865110B (en) | 1987-02-25 |
EP0209031B1 (en) | 1988-06-22 |
US4744484A (en) | 1988-05-17 |
AU594963B2 (en) | 1990-03-22 |
JPS6264730A (en) | 1987-03-23 |
DK165400B (en) | 1992-11-23 |
DE3660328D1 (en) | 1988-07-28 |
AU6001086A (en) | 1987-01-15 |
ES2000657A6 (en) | 1988-03-16 |
DK325086A (en) | 1987-01-11 |
ATE35246T1 (en) | 1988-07-15 |
CH668754A5 (en) | 1989-01-31 |
DK165400C (en) | 1993-04-05 |
DK325086D0 (en) | 1986-07-08 |
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