DE1561485A1 - Manufacturing process of laminated corrugated cardboard sheets and device for carrying out this process - Google Patents

Manufacturing process of laminated corrugated cardboard sheets and device for carrying out this process

Info

Publication number
DE1561485A1
DE1561485A1 DE19671561485 DE1561485A DE1561485A1 DE 1561485 A1 DE1561485 A1 DE 1561485A1 DE 19671561485 DE19671561485 DE 19671561485 DE 1561485 A DE1561485 A DE 1561485A DE 1561485 A1 DE1561485 A1 DE 1561485A1
Authority
DE
Germany
Prior art keywords
sheet
corrugated cardboard
paper
sheets
drum
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
DE19671561485
Other languages
German (de)
Other versions
DE1561485C (en
Inventor
Henri Bobst
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.)
Bobst Mex SA
Original Assignee
J Bobst et Fils SA
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 J Bobst et Fils SA filed Critical J Bobst et Fils SA
Publication of DE1561485A1 publication Critical patent/DE1561485A1/en
Application granted granted Critical
Publication of DE1561485C publication Critical patent/DE1561485C/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/18—Handling of layers or the laminate
    • B32B38/1825—Handling of layers or the laminate characterised by the control or constructional features of devices for tensioning, stretching or registration
    • B32B38/1833—Positioning, e.g. registration or centering
    • B32B38/1841—Positioning, e.g. registration or centering during laying up
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/14—Forming notches in marginal portion of work by cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B31F1/289—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard from discrete sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00—Animal or vegetable based
    • B32B2317/12—Paper, e.g. cardboard
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1056—Perforating lamina
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
    • Y10T156/1304—Means making hole or aperture in part to be laminated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1744—Means bringing discrete articles into assembled relationship
    • Y10T156/1768—Means simultaneously conveying plural articles from a single source and serially presenting them to an assembly station
    • Y10T156/1771—Turret or rotary drum-type conveyor

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Making Paper Articles (AREA)

Description

156U85156U85

J. Bo"bst und Sohn A. G. Prilly (Schweiz) J. Bo "bst and Son AG Prilly (Switzerland)

Herstellungsverfahren von kaschierten Wellpappebogen und Vorrichtung zur Durchführung dieses VerfahrensManufacturing process of laminated corrugated cardboard sheets and device for Implementation of this procedure

Es ist "bekannt, dass sich Wellpappe nur schlecht drucken lässt, weil ihre Oberfläche sowie ihr mechanischer Widerstand unregelmässig sind. Will man daher bedruckte Gegenstände wie Schachteln od.dgl. aus Wellpappe herstellen, so ist man genötigt, die Pappe zu kaschieren, d.h. mit vorgedruckten Papierbogen zu überziehen. Man erhält in dieser Weise sogenannte kaschierte Wellpappebogen.It is well known that corrugated cardboard does not print well because their surface and mechanical resistance are irregular. So if you want printed items like Boxes or the like. made of corrugated cardboard, one is forced to to conceal the cardboard, i.e. to cover it with preprinted sheets of paper. In this way one obtains so-called laminated corrugated cardboard sheets.

Beim Stanzen solcher Bogen ist es naturgemäss notwendig, die Stanzarbeit mit den bedruckten Mustern in Uebereinstimmung zu bringen, was bedingt, dass die einzelnen Bogen gerichtetWhen punching such sheets, it is naturally necessary to the punching work in accordance with the printed patterns to bring what requires that the individual arches are directed

009814/0230009814/0230

156U85156U85

in die sie weiterbearbeitende Maschine eingeführt werden. Dieses Richten findet in der Weise statt, dass die Bogen gegen vordere und seitliche Anschläge geführt werden.they are introduced into the further processing machine. This straightening takes place in such a way that the arches against front and side stops are guided.

Ein kaschierter Wellpappebogen sieht etwa wie in Fig. 1 dargestellt aus.A laminated sheet of corrugated cardboard looks something like FIG. 1 shown from.

Der Wellpappebogen befindet sich in 1 und trägt den darauf geklebten Papierbogen 2. Das Richten wird dann so vorgenommen, dass man den Bogen gegen vordere und seitliche Marken 3 bzw ο 4- zum Anschlag bringt.The sheet of corrugated cardboard is located in 1 and carries the sheet of paper 2 glued on it. The straightening is then carried out in such a way that that the sheet is brought to the stop against the front and side marks 3 or ο 4-.

Nun ist es weder beim Aufkleben des Blattes 2 noch beim Richten möglich die Lage der in Präge kommenden Teile genau zu bestimmen, dies weil Profil und mechanischer Widerstand der Wellpappe veränderlich sind. Das erforderliche genaue Richten ist sozusagen ausgeschlossen.Now it is not possible to exactly position the parts coming into embossing either when sticking the sheet 2 or when straightening it to determine this because the profile and mechanical resistance of the corrugated cardboard are variable. The exact required Judging is out of the question, so to speak.

Gegenstand vorliegender Erfindung ist, diesem Uebel Abhilfe zu schaffen.The subject of the present invention is to remedy this evil to accomplish.

Zu diesem Zweck sieht das vorliegende Verfahren vor, dass man beim gerichteten Erfassen des Papierbogens und Aufkleben dieses letzteren auf den Wellpappebogen im Bereich des Randes beider Bogen mittels eines dem Papierbogen gegenüber gerichteten Werkzeuges Einschnitte schneidet, welche somit den bedruckten Mustern des Kaschierbogens gegenüber eine eindeutig festgestellte Lage haben.For this purpose, the present method provides that when you grasp the sheet of paper in a directional manner and stick it on the latter on the sheet of corrugated cardboard in the area of the edge of both sheets by means of one directed opposite the sheet of paper The tool cuts incisions, which are thus clearly compared to the printed patterns on the lamination sheet have established position.

Die Vorrichtung zur Ausübung dieses Verfahrens besitzt Mittel zum einzelnen jeweils gerichteten Transport der aufzuklebenden Papierbogen, und mindestens ein damit verbundenes The device for carrying out this method has means for the individual, respectively directed transport of the paper sheets to be glued, and at least one associated therewith

009814/0230009814/0230

~5~ 156U85~ 5 ~ 156U85

Schneidwerkzeug und Mittel zum Auftragen des Klebstoffes, Mittel zum einzelnen Vorschieben der Wellpappebogen, die so angeordnet sind, dass bei jedem Aufsetzen des Papierbogens auf den Wellpappebogen, das Schneidwerkzeug gleichzeitig die Wellpappe und/oder den Papierbogen im Bereich des Randes schneidet.Cutting tool and means for applying the adhesive, Means for individually advancing the corrugated cardboard sheets, which are arranged so that each time the paper sheet is put on on the corrugated cardboard sheet, the cutting tool at the same time the corrugated cardboard and / or the paper sheet in the area of the edge cuts.

Die Fig. 2 bis 5 der anliegenden Zeichnung dienen zur Erklärung des erfindungsgemässen Verfahrens, und zwar anhand eines schematischen Ausführungsbeispieles der Vorrichtung.Figs. 2 to 5 of the accompanying drawings are used for Explanation of the method according to the invention, based on a schematic embodiment of the device.

Die Fig. 2 zeigt einen erfindungsgemäss kaschierten Wellpappebogen. 2 shows a sheet of corrugated cardboard laminated according to the invention.

Beim Auftragen bzw. Kleben des Papierbogens 2 auf dem Wellpappebogen 1 wurden gleichzeitig drei Einschnitte ausgestanzt, zwei vordere 5 und ein seitlicher 6. Diese Einschnitte liegen im Bereich des Randes beider Bogen und in vorbestimmter Lage mit Bezug auf den Papierbogen 2.When applying or gluing the sheet of paper 2 on the Corrugated cardboard sheet 1 three incisions were punched out at the same time, two front 5 and one side 6. These incisions lie in the area of the edge of both sheets and in a predetermined position with respect to the sheet of paper 2.

Es ist klar, dass beim Anlegen dieser genau geschnittenen Stellen an Anlegemarken 3 und 4-, der kaschierte Wellpappebogen mit Bezug auf den darauf liegenden Papierbogen einwandfrei gerichtet werden kann, unabhängig von den Eigenschaften der Wellpappe.It is clear that when you lay out these precisely cut points at lay-up marks 3 and 4, the laminated sheet of corrugated cardboard can be properly directed with respect to the sheet of paper lying on it, regardless of the properties of the Corrugated cardboard.

Die Anzahl und/oder die Lage der Einschnitte kann natürlich vom dargestellten Beispiel abweichen. Im vorliegenden Fall liegen die Einschnitte im Papierbogen, welcher gleichzeitig mit dem Wellpappebogen geschnitten wird, Man könnte aber auch die Einschnitte so verlegen, dass nur der WellpappebogenThe number and / or the position of the incisions can of course differ from the example shown. In the present In this case, the incisions are in the sheet of paper, which is cut at the same time as the sheet of corrugated cardboard, but you could also lay the incisions so that only the corrugated cardboard sheet

0098U/02300098U / 0230

"4" 156H8S" 4 " 156H8S

geschnitten würde. Auch ist das nicht nur auf den dargestellten Fall eines vollständig kaschierten Wellpappebogens beschränkt, es könnte sich auch um ein teilweises Kaschieren mit einem oder mehreren Papierbogen handeln.would cut. This is also not limited to the illustrated case of a completely laminated sheet of corrugated cardboard, it could also be a partial lamination with one or more sheets of paper.

Das Verfahren kann etwa mit einer Vorrichtung wie diejenige der Fig. 3 ausgeübt werden.The method can be carried out with a device such as that of FIG. 3.

In 7 sind die Wellpappebogen gestapelt und werden durch einen Anschlag 8 zurückgehalten, derart, dass der jeweils unterst liegende Bogen vorgeschoben werden kann. Solche Vorrichtungen zum stückweisen Einführen der Bogen in eine sie bearbeitende Maschine sind an sich bekannt. Die einzelnen Bogen werden in Richtung des Pfeiles 9 durch das Förderband 10 mitgenommen.In Fig. 7 the corrugated cardboard sheets are stacked and held back by a stop 8 such that the respective the bottom sheet can be advanced. Such devices for inserting the sheet piece by piece into a them processing machine are known per se. The individual sheets are conveyed through the conveyor belt 10 in the direction of arrow 9 taken away.

In 11 befindet sich der Stapel der vornehmlich vorgedruckten Papierbogen. Er liegt auf einem Tisch 12. Der Druck, gegenüber welchem die Bogen gerichtet werden müssen, befindet sich auf der Unterseite.In Fig. 11 is the stack of the predominantly preprinted Sheet of paper. It lies on a table 12. The pressure against which the sheets must be directed is located down on the bottom.

Eine an sich gleichfalls bekannte Vorrichtung erfasst die einzelnen obersten Bogen nacheinander und führt sie der geneigten Ebene 13 entlang zu Greifern 14 einer Fördertrommel 15, die in Richtung des Pfeiles 16 tangential zur Förderebene der Vellpappebogen dreht. Beim Vorbeiwandern vor einer Klebstoff auftragenden Walze I7 wird die Rückseite ^edes einzelnen Blattes mit Klebstoff überzogen.A device, which is also known per se, detects the individual uppermost sheets one after the other and guides them inclined plane 13 along to grippers 14 of a conveyor drum 15, in the direction of arrow 16 tangential to the conveying plane the cardboard sheet turns. When walking past an adhesive-applying roller 17, the rear side of each individual Sheet covered with glue.

Erreicht ein Greifer 14 die tangentiale Lage mit dem Förderband 10, so gelangt an dieser Stelle die Vorderkante eines When a gripper 14 reaches the tangential position with the conveyor belt 10, the leading edge of a reaches this point

0098U/02300098U / 0230

~ ■ 156H85~ ■ 156H85

Wellpappebogens, wonach Papier und Pappe zusammen unter die Trommel fahren und das Papier auf die Pappe angedrückt und geklebt wird. Weitere Druckrollen oder Zylinder 18 halten Papier und Pappe zusammen. Ferner wird vorausgesetzt, dass die Greifer 14 die Papierbogen 11 in gerichteter Lage erfassen, was kein Problem stellt.Corrugated cardboard sheet, after which paper and cardboard together under the Drive the drum and the paper is pressed and glued onto the cardboard. Hold additional pressure rollers or cylinders 18 Paper and cardboard together. It is also assumed that the grippers 14 grasp the paper sheets 11 in an aligned position, which poses no problem.

Neben jedem Greifer 14 ist endlich mindestens ein Schneidwerkzeug 19 in der Trommel 15 radial beweglich angeordnet.Next to each gripper 14, at least one cutting tool 19 is finally arranged in the drum 15 so as to be radially movable.

Dieses oder diese Schneidwerkzeuge liegen normalerweise im Innern der Trommel, werden aber in 19' vorgerückt und zwar im Augenblick wo der Papierbogen mit dem Wellpappebogen in Berührung kommt. In diesem Augenblick werden also die weiter oben beschriebenen Einschnitte ausgeschnitten. Es ist selbstverständlich, dass die Umfangsgeschwindigkeit der Trommel gleich sein soll der Fördergeschwindigkeit des Förderbandes 10.This or these cutting tools are normally located inside the drum but are advanced in 19 ' at the moment when the sheet of paper comes into contact with the sheet of corrugated cardboard. So at this moment they will continue Cut out the incisions described above. It goes without saying that the peripheral speed of the drum should be the same as the conveying speed of the conveyor belt 10.

In Wirklichkeit werden mehrere solche Bänder nebeneinander liegen und die Schneidwerkzeuge zwischen den Bändern angeordnet sein« Ihr "Vorrücken kann z.B. mit Hilfe einer Leitkurve stattfinden.In reality, there are several such tapes next to each other and the cutting tools are arranged between the belts. "Your" advance can be e.g. with the help of a guide curve occur.

Die schematische Darstellung der Fig· 4 zeigt, in einem grösseren Masstab, die gegenseitige Lage des mit Klebstoff versehenen Papierbogens 11·, des Wellpappebogens 71 und des Schneidwerkzeuges 191 im Augenblick wo es tätig wird.The schematic representation of FIG. 4 shows, on a larger scale, the mutual position of the sheet of paper 11, provided with adhesive, of the sheet of corrugated cardboard 7 1 and of the cutting tool 19 1 at the moment when it is activated.

Es konnten selbstverständlich andere Fördermittel der Papierbogen benutzt werden als eine Trommel, z.B. Schwinghebel\There could of course be other funds Paper sheets are used as a drum, e.g. rocker arm \

ßßS8U/0230ßßS8U / 0230

Claims (4)

Patentansprüche; . .Claims; . . 1) Herstellungsverfahren von kaschierten Wellpappebogen, dadurch gekennzeichnet, dass man beim gerichteten Erfassen des Papierbogens und Aufkleben dieses letzteren auf den Wellpappebogen im Bereich des Randes beider Bogen mittels eines dem Papierbogen gegenüber gerichteten Werkzeuges Einschnitte schneidet, welche somit den bedruckten Mustern des Kaschierbogens gegenüber eine eindeutig festgestellte Lage haben.1) Manufacturing process of laminated corrugated cardboard sheets, characterized in that one in the directional acquisition of the sheet of paper and gluing the latter onto the sheet of corrugated cardboard in the area of the edge of both sheets by means of a The tool facing the sheet of paper cuts incisions, which thus correspond to the printed patterns of the lamination sheet opposite have a clearly established position. 2) Vorrichtung zur Durchführung des Verfahrens gemäss Anspruch 1, gekennzeichnet durch Mittel (14, 15) zum einzelnen jeweils gerichteten Transport der aufzuklebenden Papierbogen (11) mit mindestens einem damit verbundenen Schneidwerkzeug (19) und durch Mittel (17) zum Auftragen des Klebstoffes, sowie durch Mittel (10) zum einzelnen Vorschieben der Wellpappebogen (7), die so angeordnet sind, dass bei jedem Aufsetzen des Papierbogens auf dem Wellpappebogen, das Schneidwerkzeug (19) gleichzeitig die Wellpappe und/oder den Papierbogen im Bereich des Randes schneidet (Fig. 4). 2) Device for performing the method according to claim 1, characterized by means (14, 15) for the individual directional transport of the paper sheets (11) to be glued with at least one cutting tool connected to it (19) and by means (17) for applying the adhesive, as well as by means (10) for individually advancing the corrugated cardboard sheets (7), which are arranged so that each time the sheet of paper is placed on the sheet of corrugated cardboard, the cutting tool (19) simultaneously cuts the corrugated cardboard and / or the sheet of paper in the area of the edge (FIG. 4). 3) Vorrichtung nach Anspruch 2, gekennzeichnet durch eine Fördertrommel (15) für die Papierbogen (H), mit Mitteln (14-) zum gerichteten Erfassen der einzelnen Bogen» welche (Trommel die Bogen nach Auftragen von Klebstoff (in H?) »it einem tangential zur Trommel (15) vorgeschobenen Wellpappebogen (7) in Berührung bringt, wobei die Trommel mindestens ein Schneidwerkzeug (19) trägt und mit Mitteln in Verbindung steht, die das Schneidwerkzeug jedesmal vorrücken, wenn ein3) Device according to claim 2, characterized by a conveyor drum (15) for the paper sheets (H), with means (14-) for directed gripping of the individual sheets »which (Drum the bow after applying glue (in H?) »It a sheet of corrugated cardboard advanced tangentially to the drum (15) (7) brings into contact with the drum at least carries a cutting tool (19) and communicates with means that advance the cutting tool every time a 0098U/02300098U / 0230 Papierbogen mit einem Wellpappebogen in Berührung kommt.Sheet of paper comes into contact with a sheet of corrugated cardboard. 4) Vorrichtung nach --Ansprüchen 2 und 5, dadurch gekennzeichnet, dass die Schneidwerkzeuge auf einem Schwinghebel liegen.4) Device according to claims 2 and 5, characterized in that that the cutting tools are on a rocker arm. τ 5144 -τ 5144 - 00 9-8 U/023000 9-8 U / 0230 LeerseiteBlank page
DE19671561485 1966-05-20 1967-05-03 Method and apparatus for loading with printed sheets of paper Expired DE1561485C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH742566 1966-05-20
CH742566A CH436954A (en) 1966-05-20 1966-05-20 Process for manufacturing laminated corrugated cardboard sheets and device for its implementation
DEB0092347 1967-05-03

Publications (2)

Publication Number Publication Date
DE1561485A1 true DE1561485A1 (en) 1970-04-02
DE1561485C DE1561485C (en) 1973-06-07

Family

ID=

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102602059A (en) * 2012-03-27 2012-07-25 温州启迪机械有限公司 Cardboard laminating machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102602059A (en) * 2012-03-27 2012-07-25 温州启迪机械有限公司 Cardboard laminating machine

Also Published As

Publication number Publication date
GB1131446A (en) 1968-10-23
BE698418A (en) 1967-10-16
US3607532A (en) 1971-09-21
FR1523072A (en) 1968-04-26
CH436954A (en) 1967-05-31
SE312060B (en) 1969-06-30
ES338855A1 (en) 1968-07-01

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Legal Events

Date Code Title Description
C3 Grant after two publication steps (3rd publication)
E77 Valid patent as to the heymanns-index 1977
8339 Ceased/non-payment of the annual fee