EP0274001A1 - Method and device for manufacturing a seal diaphragm - Google Patents

Method and device for manufacturing a seal diaphragm Download PDF

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Publication number
EP0274001A1
EP0274001A1 EP87109383A EP87109383A EP0274001A1 EP 0274001 A1 EP0274001 A1 EP 0274001A1 EP 87109383 A EP87109383 A EP 87109383A EP 87109383 A EP87109383 A EP 87109383A EP 0274001 A1 EP0274001 A1 EP 0274001A1
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EP
European Patent Office
Prior art keywords
membrane
cutting
cutting edge
sealing membrane
collar
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
Application number
EP87109383A
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German (de)
French (fr)
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EP0274001B1 (en
Inventor
H. P. Hakkers
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Machinefabriek Markhorst BV
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Machinefabriek Markhorst BV
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.)
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Application filed by Machinefabriek Markhorst BV filed Critical Machinefabriek Markhorst BV
Priority to AT87109383T priority Critical patent/ATE54846T1/en
Publication of EP0274001A1 publication Critical patent/EP0274001A1/en
Application granted granted Critical
Publication of EP0274001B1 publication Critical patent/EP0274001B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to a method and a device for producing deep-drawn sealing membranes for cans according to the preamble of the main claim and the preamble of claim 2.
  • Deep-drawn sealing membranes for cans, in particular foods are known.
  • a membrane collar is provided which covers and protects the upper edge of the can, with a can covering part engaging over the can contents.
  • the can covering part is removed.
  • a so-called plug-in lid is provided, which protects the can cover part from damage and still covers the can contents when the can cover part is removed.
  • the invention has for its object to provide an inexpensive method in which the separation of the membrane collar from the can covering part can be done from the inside of the deep-drawn sealing membrane, but there is still no complete separation between the two parts, so that even after performing the separation process the actual one deep-drawn sealing membrane is still manageable and can be used, for example, in another machine or at a different location in the can.
  • a device for performing the method is in claim 2 and further details are explained in the further subclaims.
  • the invention proposes that in the machine tool in which the deep-drawn closure membrane is formed, a cutting tool is simultaneously arranged in the interior of the cup-shaped closure membrane, which can be brought into effect by a simple movement of a pressure stamp, whereby the plunger extends transversely to the plane of projection of the cutting knife and works in the same direction as the plunger for the deformation of the sealing membrane and that the separation between the membrane collar and the can covering part takes place only on part of the circumference of the cutting knife, so that this does indeed make it clean Separation takes place in the desired areas between the two parts, but there are webs that hold the two parts together, but these webs are so small that they can be easily separated when inserting the sealing membrane into the can.
  • the method according to the invention has the advantage over the method known from DE-PS 31 13 279 that cutting burrs are directed outwards of the closure membrane, that is to the inside of the actual can shell, so that when inserting the plug-in lid or removing the plug-in lid there is no injury to the Sealing membrane can occur.
  • the cutting knife is preferably designed as a round or polygonal cutting ring knife and can be designed with notches on its circumference, but also without notches.
  • Fig. 1 denotes a round cutting ring knife, which consists of spring steel and has a sharpened cutting edge 2.
  • the cutting ring knife 1 is designed in the manner of a plate spring, i.e. it is designed to rise from the outer circumference of the cutting edge to the inside and also has an inner opening 3 which serves to receive an abutment 4 of a pressure stamp 5.
  • the actual cutting edge 2 is provided on the outer lower area of the cutting ring knife 1.
  • notches 6 are worked out over the circumference of the cutting edge, that is to say in the area of these notches 6
  • Cutting effect of the actual cutting edge 2 interrupted. 7 with a closure membrane is designated, which has a can covering part 8 and a membrane collar 9, which is not yet completely bent in the illustration in FIGS. 2 and 3, but the complete bending of the membrane collar 9 takes place only in the attached state on the in the drawing Can not shown.
  • the pressure stamp 5 is moved in the direction of the arrow F in FIG. 3 and, when it drops, causes the cutting edge 2 to move outwards, as shown in FIG. 3, while in FIG. 2 the cutting edge is drawn inwards, so that problem-free shaping of the actual sealing membrane 7 can take place.

Abstract

1. Device for manufacturing a deep-drawn seal diaphragm (7) for cans and other small containers, with a female mould (M) and a male mould (P) for forming a can cover part (8) insertable in the can body, a securing element (L) for a diaphragm collar (9) extending over the can rim, and a severing tool (T) which, from the inside, almost completely severs the diaphragm collar (9) from the can cover part (8), characterised by an annular cutting knife (1) made of spring steel as the severing tool (T), said knife having a cutting edge (2) at its external circumference and being constructed as a cup spring, and being shaped so as to extend upwards from the cutting edge (2) to its inside aperture (3), and by a press ram (5) which is adapted to be moved perpendicularly to the projection plane of the annular cutting knife (1) and, as it moves, forces the cutting edge (2) outwards.

Description

Die Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zur Herstellung von tiefgezogenen Verschlußmembranen für Dosen gemäß dem Oberbegriff des Hauptanspruches bzw. dem Oberbegriff des An­spruches 2.The invention relates to a method and a device for producing deep-drawn sealing membranes for cans according to the preamble of the main claim and the preamble of claim 2.

Tiefgezogene Verschlußmembranen für insbesondere Lebensmittel aufnehmende Dosen sind bekannt. Hierbei ist ein Membrankragen vorgesehen, der den oberen Rand der Dose abdeckt und schützt, wobei ein Dosen­überdeckungsteil den Doseninhalt übergreift. Bei Öffnen der Dose wird der Dosenüberdeckungsteil ab­gezogen. Außerdem ist ein sogenannter Steckdeckel vorgesehen, der bei noch vorhandenem Dosenüber­deckungsteil diesen gegen Beschädigungen schützt und bei abgenommenem Dosenüberdeckungsteil den Dosenin­halt schützend übergreift.Deep-drawn sealing membranes for cans, in particular foods, are known. Here, a membrane collar is provided which covers and protects the upper edge of the can, with a can covering part engaging over the can contents. When the can is opened, the can covering part is removed. In addition, a so-called plug-in lid is provided, which protects the can cover part from damage and still covers the can contents when the can cover part is removed.

Um die Trennung zwischen Membrankragen und Dosen­überdeckungsteil vorzunehmen, ist es bekannt, bei in die Dose eingesetzter Verschlußmembrane diese von innen her mit einem umlaufenden Schneidmesser aufzu­ trennen. Diese Anordnung und Verfahrensweise hat den Nachteil, daß häufig die eigentliche Dose verletzt wird, so daß dort Zersetzungserscheinungen auftreten können. Außerdem ist dieses Verfahren deshalb nach­teilig, da insbesondere bei aus Pappe bestehenden Dosen der Innendurchmesser nie genau konstant ist, so daß es vorkommen kann, daß auf einem Bereich die Dose sehr tief eingeschnitten wird, in einem anderen Bereich aber eine Trennung der Verschlußmembrane nicht erfolgt.In order to make the separation between the membrane collar and the can covering part, it is known to open it from the inside with a circumferential cutting knife when the sealing membrane is inserted into the can separate. This arrangement and procedure has the disadvantage that the actual can is often injured, so that decomposition phenomena can occur there. In addition, this method is disadvantageous because, in particular in the case of cans made of cardboard, the inside diameter is never exactly constant, so that it can happen that the can is cut very deeply in one area, but the sealing membrane is not separated in another area.

Aus der DE-PS 31 13 279 ist es bekannt, die Ver­schlußmembrane von außen her aufzuschneiden und im getrennten Zustand in die Dose einzusetzen. Diese Verfahrensweise ist aufwendig, da das von außen wirksame Schneidwerkzeug einen erheblichen Maschi­nenaufwand erfordert und das Aufschneiden und Ein­setzen nur in einem kombinierten Arbeitsvorgang er­folgen kann, d.h. die aufgetrennte Verschlußmembrane ist für sich selbst nicht mehr handhabungsfähig, kann beispielsweise nicht verschickt werden.From DE-PS 31 13 279 it is known to cut open the sealing membrane from the outside and to insert it into the can in the separated state. This procedure is complex since the cutting tool, which is effective from the outside, requires a considerable amount of machinery and the cutting and insertion can only take place in a combined work process, i.e. the separated sealing membrane is no longer manageable by itself, for example it cannot be sent.

Der Erfindung liegt die Aufgabe zugrunde, ein ko­stengünstiges Verfahren zu schaffen, bei welchem das Trennen des Membrankragens vom Dosenüberdeck­ungsteil vom Inneren der tiefgezogenen Verschluß­membrane her erfolgen kann, weiterhin aber kein vollständiges Trennen zwischen den beiden Teilen erfolgt, so daß auch nach Durchführen des Trenn­vorganges die eigentliche tiefgezogene Verschluß­membrane noch handhabungsfähig ist und beispiels­weise in einer anderen Maschine oder an einem anderen Ort in die Dose eingesetzt werden kann.The invention has for its object to provide an inexpensive method in which the separation of the membrane collar from the can covering part can be done from the inside of the deep-drawn sealing membrane, but there is still no complete separation between the two parts, so that even after performing the separation process the actual one deep-drawn sealing membrane is still manageable and can be used, for example, in another machine or at a different location in the can.

Diese der Erfindung zugrundeliegende Aufgabe wird durch die Lehre des Hauptanspruches gelöst.This object underlying the invention will solved by the teaching of the main claim.

Eine Vorrichtung zur Durchführung des Verfahrens ist im Anspruch 2 und weitere Einzelheiten sind in den weiteren Unteransprüchen erläutert.A device for performing the method is in claim 2 and further details are explained in the further subclaims.

Mit anderen Worten ausgedrückt, schlägt die Erfin­dung vor, daß in die Werkzeugmaschine, in der die Formung der tiefgezogenen Verschlußmembrane erfolgt, gleichzeitig im Inneren der topfförmigen Verschluß membrane ein Schneidwerkzeug angeordnet ist, das durch eine einfache Bewegung eines Druckstempels zur Wirkung gebracht werden kann, wobei der Druckstempel sich quer zur Projektionsebene des Schneidmessers erstreckt und in der gleichen Richtung arbeitet wie der Formstempel für die Verformung der Verschlußmem­brane und daß weiterhin die Trennung zwischen dem Membrankragen und dem Dosenüberdeckungsteil nur auf einem Teil des Umfanges des Schneidmessers erfolgt, so daß dadurch zwar eine saubere Trennung in den ge­wünschten Bereichen zwischen den beiden Teilen er­folgt, aber noch Stege vorhanden sind, die die bei­den Teile miteinander zusammenhalten, wobei diese Stege aber so klein sind, daß sie problemlos beim Einsetzen der Verschlußmembrane in die Dose aufge­trennt werden können.In other words, the invention proposes that in the machine tool in which the deep-drawn closure membrane is formed, a cutting tool is simultaneously arranged in the interior of the cup-shaped closure membrane, which can be brought into effect by a simple movement of a pressure stamp, whereby the plunger extends transversely to the plane of projection of the cutting knife and works in the same direction as the plunger for the deformation of the sealing membrane and that the separation between the membrane collar and the can covering part takes place only on part of the circumference of the cutting knife, so that this does indeed make it clean Separation takes place in the desired areas between the two parts, but there are webs that hold the two parts together, but these webs are so small that they can be easily separated when inserting the sealing membrane into the can.

Das erfindungsgemäße Verfahren hat gegenüber dem aus der DE-PS 31 13 279 bekannten Verfahren weiterhin den Vorteil, daß Schneidgrate nach außen der Ver­schlußmembrane gerichtet sind, also zum Inneren des eigentlichen Dosenmantels, so daß beim Einsetzen des Steckdeckels oder Entfernen des Steckdeckels hier keine Verletzung der Verschlußmembrane auftreten kann.The method according to the invention has the advantage over the method known from DE-PS 31 13 279 that cutting burrs are directed outwards of the closure membrane, that is to the inside of the actual can shell, so that when inserting the plug-in lid or removing the plug-in lid there is no injury to the Sealing membrane can occur.

Vorzugsweise ist das Schneidmesser als rundes oder polygonales Schneidringmesser ausgebildet und kann an seinem Umfang mit Kerben ausgebildet, aber auch ohne Kerben ausgebildet sein.The cutting knife is preferably designed as a round or polygonal cutting ring knife and can be designed with notches on its circumference, but also without notches.

Ein Ausführungsbeispiel der Erfindung wird nachfol­gend anhand der Zeichnung erläutert.An embodiment of the invention is explained below with reference to the drawing.

Die Zeichnung zeigt dabei in

  • Fig. 1 teilweise geschnitten, teilweise schau­bildlich ein Schneidringmesser, in
  • Fig. 2 die Anordnung des Schneidringmessers in einer Formstation im Ruhezustand des Schneidmessers und in
  • Fig. 3 die Anordnung des Schneidringmessers in der Formstation bei niedergedrücktem Druckstempel.
The drawing shows in
  • Fig. 1 partially cut, partially a cutting ring knife, in
  • Fig. 2 shows the arrangement of the cutting ring knife in a forming station in the idle state of the cutting knife and in
  • Fig. 3 shows the arrangement of the cutting ring knife in the forming station with the pressure stamp depressed.

In Fig. 1 ist mit 1 ein rundes Schneidringmesser bezeichnet, das aus Federstahl besteht und eine angeschärfte Schneidkante 2 aufweist. Das Schneid­ringmesser 1 ist in Art einer Tellerfeder ausge­bildet, d.h. es ist von dem Außenumfang der Schneid­kante zum Inneren hin ansteigend ausgebildet und weist außerdem eine Innenöffnung 3 auf, die der Auf­nahme eines Widerlagers 4 eines Druckstempels 5 dient.In Fig. 1, 1 denotes a round cutting ring knife, which consists of spring steel and has a sharpened cutting edge 2. The cutting ring knife 1 is designed in the manner of a plate spring, i.e. it is designed to rise from the outer circumference of the cutting edge to the inside and also has an inner opening 3 which serves to receive an abutment 4 of a pressure stamp 5.

Die eigentliche Schneidkante 2 ist am äußeren unteren Bereich des Schneidringmessers 1 vorgesehen.The actual cutting edge 2 is provided on the outer lower area of the cutting ring knife 1.

Über den Umfang der Schneidkante verteilt sind bei dem dargestellten Ausführungsbeispiel Kerben 6 aus­gearbeitet, d.h. im Bereich dieser Kerben 6 ist die Schneidwirkung der eigentlichen Schneidkante 2 un­terbrochen. Mit 7 ist eine Verschlußmembrane be­zeichnet, die ein Dosenüberdeckungsteil 8 und einen Membrankragen 9 aufweist, der bei der Darstellung in Fig. 2 und 3 noch nicht vollständig umgebogen ist, sondern das vollständige Umbiegen des Membran­kragens 9 erfolgt erst im aufgesetzten Zustand auf die in der Zeichnung nicht dargestellte Dose.In the exemplary embodiment shown, notches 6 are worked out over the circumference of the cutting edge, that is to say in the area of these notches 6 Cutting effect of the actual cutting edge 2 interrupted. 7 with a closure membrane is designated, which has a can covering part 8 and a membrane collar 9, which is not yet completely bent in the illustration in FIGS. 2 and 3, but the complete bending of the membrane collar 9 takes place only in the attached state on the in the drawing Can not shown.

Der Druckstempel 5 wird in Richtung des Pfeiles F in Fig. 3 bewegt und bewirkt bei seinem Niedergang eine Verschiebung der Schneidkante 2 nach außen, so wie dies in Fig. 3 dargestellt ist, während in Fig 2 die Schneidkante nach innen eingezogen ist, so daß ein problemloses Formen der eigentlichen Verschluß­membrane 7 erfolgen kann.The pressure stamp 5 is moved in the direction of the arrow F in FIG. 3 and, when it drops, causes the cutting edge 2 to move outwards, as shown in FIG. 3, while in FIG. 2 the cutting edge is drawn inwards, so that problem-free shaping of the actual sealing membrane 7 can take place.

Wird nunmehr - wie in Fig. 3 dargestellt - der Druckstempel 5 nach unten bewegt, gelangt die ei­gentliche Schneidkante in die in der Zeichnung über­trieben dick dargestellte Verschlußmembrane 7 und trennt im Bereich der Schneidkante 2 die Verschluß­membrane durch, so daß dadurch das Dosenüber­deckungsteil 8 und der Membrankragen 9 geschaffen werden.If - as shown in Fig. 3 - the plunger 5 is now moved downward, the actual cutting edge passes into the closing membrane 7, which is shown in an exaggerated thickness in the drawing, and separates the closing membrane in the area of the cutting edge 2, so that thereby the can covering part 8 and the Membrane collar 9 are created.

Da aber die Schneidwirkung des Schneidringmessers 1 entweder aufgrund der Kerben 6 oder bei glatter Schneidkante 2, weil die Abwärtsbeweung in Richtung des Pfeiles F geringer ist, nicht über den gesam­ten Umfang erfolgt, hängen der Membrankragen 9 und der Dosenüberdeckungsteil 8 noch zusammen und sind daher als Gesamtheit handhabbar.However, since the cutting action of the cutting ring knife 1 is not over the entire circumference either due to the notches 6 or with a smooth cutting edge 2, because the downward movement in the direction of the arrow F is less, the membrane collar 9 and the can covering part 8 are still connected and are therefore considered to be Whole manageable.

Wird nunmehr die so eingeschnittene Verschlußmem­ brane 7 in an sich bekannter Weise in eine Dose ein­gesetzt, erfolgt beim Einsetzen ein Trennen zwischen Membrankragen 9 und Dosenüberdeckungsteil 8, wobei eventuell entstehende Schneidgrate im Bereich der Verschlußmembrane 7 durch die Schneidkante 2 nach außen der Verschlußmembrane 7 gerichtet sind, d.h. zum Inneren der Dosenwandung. Wird anschließend ein nicht dargestellter Steckdeckel eingesetzt, bilden diese Schneidgrate keine Behinderung für den Deckel und hier kann es nicht zu Beschädigungen der Ver­schlußmembrane 7 kommen.Now the closure member cut in this way Brane 7 inserted into a can in a manner known per se, there is a separation between the membrane collar 9 and the can covering part 8 when inserting, wherein any cutting burrs which may arise in the area of the sealing membrane 7 are directed through the cutting edge 2 to the outside of the sealing membrane 7, ie to the inside of the can wall . If a plug-in cover (not shown) is subsequently used, these cutting burrs do not form an obstacle for the cover and damage to the sealing membrane 7 cannot occur here.

Claims (5)

1. Verfahren zur Herstellung einer tiefgezogenen Verschlußmembrane für Dosen, bei welchem ein Dosenüberdeckungsteil in den Dosenrumpf ein­geschoben wird und ein Membrankragen in die Dose eingesetzt den Dosenrand übergreift und beide Verschlußmembranteile im eingesetzten Zustand voneinander getrennt sind, dadurch gekennzeichnet, daß während der Formung der topfförmigen Verschlußmembrane vom Inneren her der Membrankragen vom Dosenüberdeckungs­teil fast vollständig getrennt wird und bei Einsetzen der Verschlußmembrane in die Dose eine vollständige Trennung von Membrankragen und Dosenüberdeckungsteil erfolgt.1. A process for producing a deep-drawn sealing membrane for cans, in which a can covering part is inserted into the can body and a membrane collar inserted into the can overlaps the can rim and the two sealing membrane parts are separated from one another in the inserted state, characterized in that during the formation of the cup-shaped sealing membrane the inside of the membrane collar is almost completely separated from the can covering part and when the sealing membrane is inserted into the can, a complete separation of the membrane collar and the can covering part takes place. 2. Vorrichtung zur Herstellung einer tiefgezo­genen Verschlußmembrane für Dosen, wobei die Verschlußmembrane ein in den Dosenrumpf ein­geschobenes Dosenüberdeckungsteil und einen Membrankragen aufweist, der den Dosenrand übergreift und weiterhin ein Druckstempel vorgesehen ist, der in Richtung der Längs­achse der Dose bewegbar ist, gekennzeichnet durch ein an seinem Außenumfang eine Schneid­kante (2) aufweisendes Schneidringmesser (1) aus Federstahl, das von der Schneidkante (2) zu seiner Innenöffnung (3) ansteigend ausge­bildet ist und der Druckstempel (5) senkrecht zur Projektionsebene des Schneidringmessers (1) bewegbar ist und bei seiner Bewegung die Schneidkante (2) nach außen zwingt.2. Device for producing a deep-drawn sealing membrane for cans, the sealing membrane having a can covering part inserted into the can body and a membrane collar which engages over the edge of the can and a pressure stamp is also provided which is movable in the direction of the longitudinal axis of the can, characterized by an its outer circumference has a cutting edge (2) with a cutting ring knife (1) made of spring steel, which is designed to rise from the cutting edge (2) to its inner opening (3) and the plunger (5) can be moved perpendicular to the projection plane of the cutting ring knife (1) and with it Movement forces the cutting edge (2) outwards. 3. Vorrichtung nach Anspruch 2, dadurch gekenn­ zeichnet, daß die Schneidkante (2) über den Umfang verteilt mehrere Kerben (6) aufweist, die die Schneidwirkung in diesem Bereich auf­heben.3. Device according to claim 2, characterized shows that the cutting edge (2) has several notches (6) distributed over the circumference, which cancel the cutting effect in this area. 4. Vorrichtung nach Anspruch 2 und 3, dadurch gekennzeichnet, daß das Schneidringmesser an seinem Außenumfang ringförmig ausgebildet ist.4. Apparatus according to claim 2 and 3, characterized in that the cutting ring knife is annular on its outer circumference. 5. Vorrichtung nach Anspruch 2 und 3, dadurch gekennzeichnet, daß das Schneidringmesser an seinem Außenumfang polygonal ausgebildet ist.5. Apparatus according to claim 2 and 3, characterized in that the cutting ring knife is polygonal on its outer circumference.
EP87109383A 1987-01-07 1987-06-30 Method and device for manufacturing a seal diaphragm Expired - Lifetime EP0274001B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87109383T ATE54846T1 (en) 1987-01-07 1987-06-30 METHOD AND DEVICE FOR MANUFACTURING A OCCLUSION MEMBRANE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3700241A DE3700241C1 (en) 1987-01-07 1987-01-07 Method and device for producing a sealing membrane
DE3700241 1987-01-07

Publications (2)

Publication Number Publication Date
EP0274001A1 true EP0274001A1 (en) 1988-07-13
EP0274001B1 EP0274001B1 (en) 1990-07-25

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ID=6318502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109383A Expired - Lifetime EP0274001B1 (en) 1987-01-07 1987-06-30 Method and device for manufacturing a seal diaphragm

Country Status (4)

Country Link
EP (1) EP0274001B1 (en)
AT (1) ATE54846T1 (en)
DE (2) DE3700241C1 (en)
ES (1) ES2017679B3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109332482A (en) * 2018-10-23 2019-02-15 上海航天设备制造总厂有限公司 A kind of accumulator bellows diaphragm optimization process for stamping and forming method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3901703C1 (en) * 1989-01-21 1989-08-24 Markhorst Holland B.V., Hardenberg, Nl
DE102006011748B4 (en) * 2006-03-13 2011-03-10 Abro Weidenhammer Gmbh Packaging container with a tearable sealing membrane and process for its production

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2919395A1 (en) * 1978-05-23 1979-11-29 Usm Corp METHOD AND DEVICE FOR PRODUCING AN EASILY OPENING CONTAINER CLOSURE PART
US4216736A (en) * 1979-02-02 1980-08-12 Boise Cascade Corporation Method and apparatus for forming no-fin scored metal ends
DE3113279A1 (en) * 1980-05-07 1982-10-07 Zeiler AG, 5600 Lenzburg Method for producing a closure device on a can, and device for carrying out the method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3425251A (en) * 1966-07-18 1969-02-04 Coors Porcelain Co Can trimmer and scrap disposing mechanism
DE1602538A1 (en) * 1967-06-16 1970-03-05 Rasselstein Ag Device for trimming deep-drawn and then ironed hollow bodies

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2919395A1 (en) * 1978-05-23 1979-11-29 Usm Corp METHOD AND DEVICE FOR PRODUCING AN EASILY OPENING CONTAINER CLOSURE PART
US4216736A (en) * 1979-02-02 1980-08-12 Boise Cascade Corporation Method and apparatus for forming no-fin scored metal ends
DE3113279A1 (en) * 1980-05-07 1982-10-07 Zeiler AG, 5600 Lenzburg Method for producing a closure device on a can, and device for carrying out the method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109332482A (en) * 2018-10-23 2019-02-15 上海航天设备制造总厂有限公司 A kind of accumulator bellows diaphragm optimization process for stamping and forming method

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Publication number Publication date
DE3763969D1 (en) 1990-08-30
EP0274001B1 (en) 1990-07-25
ATE54846T1 (en) 1990-08-15
ES2017679B3 (en) 1991-03-01
DE3700241C1 (en) 1987-11-12

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