EP4010150B1 - Stapling device - Google Patents

Stapling device Download PDF

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Publication number
EP4010150B1
EP4010150B1 EP20771242.3A EP20771242A EP4010150B1 EP 4010150 B1 EP4010150 B1 EP 4010150B1 EP 20771242 A EP20771242 A EP 20771242A EP 4010150 B1 EP4010150 B1 EP 4010150B1
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EP
European Patent Office
Prior art keywords
staple
bending
pivot axes
staples
staple legs
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EP20771242.3A
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German (de)
French (fr)
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EP4010150A1 (en
EP4010150B8 (en
Inventor
Robert Ohlsson
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Isaberg Rapid AB
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Isaberg Rapid AB
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Publication of EP4010150B1 publication Critical patent/EP4010150B1/en
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Publication of EP4010150B8 publication Critical patent/EP4010150B8/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25CHAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C5/00Manually operated portable stapling tools; Hand-held power-operated stapling tools; Staple feeding devices therefor
    • B25C5/02Manually operated portable stapling tools; Hand-held power-operated stapling tools; Staple feeding devices therefor with provision for bending the ends of the staples on to the work
    • B25C5/0221Stapling tools of the table model type, i.e. tools supported by a table or the work during operation
    • B25C5/0257Stapling tools of the table model type, i.e. tools supported by a table or the work during operation without an anvil, e.g. using staples of particular shape bent during the stapling operation without the use of external clinching means
    • B25C5/0264Stapling tools of the table model type, i.e. tools supported by a table or the work during operation without an anvil, e.g. using staples of particular shape bent during the stapling operation without the use of external clinching means having pivoting clinching means for bending the staple ends
    • B25C5/0271Clinching means therefor

Definitions

  • the invention relates to a stapler according to the preamble of claim 1.
  • Such a stapler is from EP 1 480 788 B1 known. Its configuration with an anvil leg that can be moved against a restoring force towards a lower part of the device and with two-armed bending levers pivotably mounted on the anvil leg, which bend the staple legs passed through the sheet material when the anvil leg is pressed down and cut off excess end parts of the staple legs by pressing against the cutting edges of the cutting block, makes it possible to always use the same staples for sheet material with very different overall thicknesses. If only a few sheets of paper are stapled together, for whose total thickness the staple legs would actually be too long, the excess end sections are simply cut off.
  • the bending levers are offset from one another in a direction that extends perpendicularly to the staple crowns of the staples held in the staple magazine.
  • the pivot axes of the bending levers are not arranged in the direction perpendicular to the staple crowns, but are twisted out of this direction. The result of this is that the staple legs are not bent exactly towards the staple crown when they are bent, but rather a little way next to it. When cutting off the excess end parts, this results in a cutting edge that does not run perpendicular to the longitudinal extension of the clip legs. This can lead to increased Wear of the cutting edges or even jamming of the staple legs on the cutting edges.
  • the invention is based on the idea of designing the second lever arms of the bending levers in such a way that they are also moved past one another during the bending process if they are arranged opposite one another with pivot axes running essentially perpendicularly to the staple crowns of the staples held in the staple magazine.
  • the pivot axes each run at an angle of 90° ⁇ 2° and preferably at an angle of 90° ⁇ 1° to the clip crowns.
  • each of the pivot axes runs exactly perpendicular to the staple crowns of the staples held in the staple magazine within the scope of the usual manufacturing accuracy.
  • the bending levers can then be arranged opposite one another at the same point in the sense that they are at the same distance from the free end of the lower part of the device.
  • the thickness of the end sections is preferably less than the maximum thickness of the first lever arms. It is further preferred that both bending surfaces have the same extent in the axial direction of the pivot axes. While the bending surfaces should be as large as possible in order to reliably grasp the staple legs passed through the sheet material, it is advantageous if the end sections are made thinner so that they can easily be guided past one another during the bending process.
  • the first lever arms are expediently arranged mirror-symmetrically to one another with respect to a plane of symmetry running in the middle between the pivot axes perpendicular to the staple webs of the staples accommodated in the staple magazine. This makes it easier to shape the clip legs as symmetrically as possible. It is further preferred that the thickness of the end sections is at most half as large as the maximum thickness of the first lever arms in order to be able to reliably move the end sections past one another.
  • the pivot axes are advantageously arranged at such a distance from one another that the first lever arms can be moved past the cutting edges. They can then also be moved further after the excess end parts of the staple legs have been cut off, until the staple legs are pressed against the back of the stapled sheet material.
  • the support plate expediently has openings on both sides of the cutting block for the free ends of the clip legs to pass through after the sheet material has been pierced through.
  • the bending surfaces are advantageously each moved from a rest position, in which they are arranged at a positive acute angle to a bearing surface on the upper side of the bearing plate, to a Bracket position pivotable, in which they are arranged parallel or at a negative acute angle to the support surface.
  • the stapling device 10 shown in the drawing is used for stapling sheet material using staples 12 which, as shown in FIG Figure 3a , 3b as can be seen, each have two clip legs 14 and a clip leg 14 connecting the clip legs 14 to one another and running transversely thereto.
  • the staples 12 thus have the shape of a U which is open at the bottom, with the staple legs 14 piercing the sheet material with their free ends during the stapling process and being bent over on the underside of the sheet material.
  • the stapler has a lower part 18 which extends in a longitudinal direction 20 from a rear end 22 to a front end 24 and carries an anvil arm 26 which is mounted on the lower part 18 so that it can move against a restoring force, for example a spring, towards the latter.
  • the anvil leg 26 is pivotably mounted on the lower part 18 in the region of a bearing block 28 arranged near the rear end 22 .
  • the stapling device 10 also has a stapling unit 30, which has a staple magazine 32 in which the staples 12 are arranged in a row lying next to one another.
  • the clamping unit 30 also has a hand lever 34 which projects obliquely upwards from the bearing block 28 and extends in the direction of the rear end 22 .
  • a driver 36 is arranged on the hand lever 34, and the hand lever 34 is mounted on the bearing block 28 in relation to the lower part 18 and the staple magazine 32 such that it can be pivoted downwards against a restoring force.
  • the staple magazine 32 is pivotably mounted on the bearing block 28 relative to the lower part 18 .
  • the anvil leg 26 has a bearing plate 38 to place the sheet material, with the hand lever 34 being pressed down during the stapling process, with the staple magazine 32 pressing down on the sheet material and with the driver 36 finally using an increased force to press the foremost staple 12 with the free ends of its staple legs 14 pushes ahead through the leaf material.
  • the stapler 10 is characterized in that only staples 12 of a single size are required for sheet material of different thicknesses, in the present case for sheet material consisting of 2 to 170 sheets of paper, since excess end portions of the staple legs 14 are cut off during the stapling process.
  • the anvil arm carries a cutting block 40 with two cutting edges 42 arranged on opposite sides of the cutting block 40, with a projection of the cutting edges 42 onto the underside installation surface 44 of the lower part 18, with which the stapler 10 can be placed flat on a base, such as a Desk that can be set up runs in the longitudinal direction 20.
  • the cutting edges 42 therefore always run perpendicularly to the staple webs 16 of the staples 12 accommodated in the staple magazine 32 within the scope of the usual manufacturing accuracy, since the row of staples 12 also extends in the longitudinal direction 20 in their projection onto the mounting surface 44 .
  • the assembly 46 shown, to which the cutting block 40 belongs, and which is firmly connected to the anvil arm 26, also has two identical bending levers 50 arranged between two side plates 48. Each of the bending levers 50 is mounted on the anvil leg 26 between the side plates 48 so that it can pivot about a pivot axis 52 .
  • first lever arm 54 which has a bending surface 56 on the upper side, and a longer second lever arm 58 which rests on the lower part 18 .
  • the projection of the pivot axes 52 into the mounting surface 44 runs in the longitudinal direction 20.
  • the pivot axes 52 thus run within the manufacturing tolerances perpendicular to the staple webs 16 of the staples 12 accommodated in the staple magazine 32.
  • the second lever arms 58 are pressed onto the bottom of the lower part 18 so that the bending levers 50 pivot about the pivot axes 52 as a result of the depression.
  • the bending levers 50 are also in a rest position in which the bending surfaces 56 are arranged at a positive acute angle to a bearing surface 60 on the upper side of the bearing plate 38. This angle decreases during the stapling process, i.e. when the bending lever 50 is pivoted.
  • the free ends of the staple legs 14 each come to rest on one of the bending surfaces 56, and the end sections of the staple legs 14 that have been pierced through the sheet material are bent by pivoting the Bending lever 50 bent towards each other. Any excess end portions of the staple legs 14, which are very long in the present exemplary embodiment, are pressed against the cutting edges 42 by the bending levers 50 during bending and are cut off.
  • the clip legs 14 are passed through openings 62 in the support plate 38 with their free ends after piercing through the sheet material.
  • the pivot axes 52 are arranged at such a distance from one another and the first lever arms 54 are dimensioned such that the latter can be moved past the cutting edges 42 when the bending levers 50 are pivoted.
  • the bending levers 50 can then be pivoted out of the rest position into an end position in which their bending surfaces 56 are arranged parallel or at a negative acute angle to the bearing surface.
  • the first lever arms 54 are arranged mirror-symmetrically to one another with respect to a plane of symmetry running in the middle between the pivot axes 52 in the longitudinal direction 20 .
  • the bending surfaces 56 have the same extent in the axial direction of the pivot axes 52 .
  • the second lever arms 58 have end sections 66 beginning at their free ends 64 and extending a little in the direction of the respective pivot axis 52 , the thickness of which measured in the axial direction of the pivot axes 52 is smaller is the maximum thickness of the first lever arms, which is defined by the extent of the bending surface 56 in the axial direction of the pivot axes 52 .
  • the thickness of the end sections 66 is less than half the maximum thickness of the first lever arms 54, so that the end sections 66, as in Figure 3a , 3b shown, can be moved past each other during the stapling process without colliding with each other.
  • the invention relates to a stapling device 10 for stapling sheet material together by means of staples 12, each of which has two staple legs 14 and a staple web 16 connecting the staple legs 14 to one another and running transversely thereto, with a support plate 38 for placing the sheet material
  • a driver 36 for pressing individual staples 12 with the free ends of their staple legs 14 first through the staple unit 30 comprising the sheet material, with a lower part 18 on which the anvil leg 26 is mounted so that it can move towards it against a restoring force, and with two, each about a pivot axis 52, two-armed bending levers 50 pivotably mounted on the anvil leg 26, each of which has a first lever arm 54 having
  • the pivot axes 52 run essentially perpendicularly to the staple webs 16 of the staples 12 accommodated in the staple magazine 32 and that the second lever arms 58 begin at their free ends 64 Having end sections 66 which are arranged offset from one another in the axial direction of the pivot axes 52 in such a way that they move past one another when the anvil arm 26 approaches the lower part 18 .

Description

Die Erfindung betrifft ein Heftklammergerät gemäß Oberbegriff des Anspruchs 1.The invention relates to a stapler according to the preamble of claim 1.

Ein solches Heftklammergerät ist aus der EP 1 480 788 B1 bekannt. Seine Ausgestaltung mit einem gegen eine Rückstellkraft auf ein Geräteunterteil zu beweglichen Ambossschenkel und mit verschwenkbar am Ambossschenkel gelagerten zweiarmigen Biegehebeln, welche beim Niederdrücken des Ambossschenkels die durch das Blattgut durchgeführten Klammerschenkel umbiegen und überschüssige Endpartien der Klammerschenkel durch Andrücken an die Schneidkanten des Schneidblocks abschneiden, ermöglicht es, für Blattgut mit sehr unterschiedlicher Gesamtdicke stets dieselben Heftklammern zu verwenden. Werden nur wenige Blatt Papier zusammengeheftet, für deren Gesamtdicke die Klammerschenkel eigentlich zu lang wären, so werden deren überschüssige Endpartien einfach abgeschnitten. Um beim Biegevorgang nicht miteinander zu kollidieren, sind die Biegehebel in einer Richtung, die sich senkrecht zu den Klammerkronen der im Klammermagazin aufgenommenen Heftklammern erstreckt, gegeneinander versetzt angeordnet. Um dennoch eine Beaufschlagung beider Klammerschenkel durch jeweils einen der Biegehebel zu erzielen, sind die Schwenkachsen der Biegehebel zudem nicht in der senkrecht zu den Klammerkronen verlaufenden Richtung angeordnet, sondern aus dieser Richtung heraus verdreht. Dies führt dazu, dass die Klammerschenkel beim Umbiegen nicht exakt auf die Klammerkrone zu umgebogen werden, sondern ein Stück weit neben diese. Hieraus resultiert beim Abschneiden der überschüssigen Endpartien eine Schnittkante, die nicht senkrecht zur Längserstreckung der Klammerschenkel verläuft. Dies kann zu erhöhtem Verschleiß der Schneidkanten oder sogar zu einem Festklemmen der Klammerschenkel an den Schneidkanten führen.Such a stapler is from EP 1 480 788 B1 known. Its configuration with an anvil leg that can be moved against a restoring force towards a lower part of the device and with two-armed bending levers pivotably mounted on the anvil leg, which bend the staple legs passed through the sheet material when the anvil leg is pressed down and cut off excess end parts of the staple legs by pressing against the cutting edges of the cutting block, makes it possible to always use the same staples for sheet material with very different overall thicknesses. If only a few sheets of paper are stapled together, for whose total thickness the staple legs would actually be too long, the excess end sections are simply cut off. In order not to collide with one another during the bending process, the bending levers are offset from one another in a direction that extends perpendicularly to the staple crowns of the staples held in the staple magazine. In order to nevertheless achieve an action on both staple legs by one of the bending levers, the pivot axes of the bending levers are not arranged in the direction perpendicular to the staple crowns, but are twisted out of this direction. The result of this is that the staple legs are not bent exactly towards the staple crown when they are bent, but rather a little way next to it. When cutting off the excess end parts, this results in a cutting edge that does not run perpendicular to the longitudinal extension of the clip legs. This can lead to increased Wear of the cutting edges or even jamming of the staple legs on the cutting edges.

Es ist daher Aufgabe der Erfindung, ein Heftklammergerät der eingangs genannten Art derart weiterzubilden, dass es weniger verschleiß- und/oder störungsanfällig ist.It is therefore the object of the invention to further develop a stapling device of the type mentioned at the outset in such a way that it is less susceptible to wear and/or faults.

Diese Aufgabe wird erfindungsgemäß durch ein Heftklammergerät mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der abhängigen Ansprüche.According to the invention, this object is achieved by a stapling device having the features of claim 1 . Advantageous developments of the invention are the subject matter of the dependent claims.

Der Erfindung liegt der Gedanke zugrunde, die zweiten Hebelarme der Biegehebel so auszugestalten, dass sie beim Biegevorgang auch dann aneinander vorbei bewegt werden, wenn sie mit im Wesentlichen senkrecht zu den Klammerkronen der im Klammermagazin aufgenommenen Heftklammern verlaufenden Schwenkachsen einander gegenüberliegend angeordnet sind. Die Schwenkachsen verlaufen dabei jeweils in einem Winkel von 90° ± 2° und vorzugsweise in einem Winkel von 90° ± 1° zu den Klammerkronen. Idealerweise verläuft jede der Schwenkachsen im Rahmen der üblichen Fertigungsgenauigkeiten exakt senkrecht zu den Klammerkronen der im Klammermagazin aufgenommenen Heftklammern. Die Biegehebel können dann an gleicher Stelle einander gegenüberliegend angeordnet werden in dem Sinne, dass sie denselben Abstand zum freien Ende des Geräteunterteils aufweisen.The invention is based on the idea of designing the second lever arms of the bending levers in such a way that they are also moved past one another during the bending process if they are arranged opposite one another with pivot axes running essentially perpendicularly to the staple crowns of the staples held in the staple magazine. The pivot axes each run at an angle of 90°±2° and preferably at an angle of 90°±1° to the clip crowns. Ideally, each of the pivot axes runs exactly perpendicular to the staple crowns of the staples held in the staple magazine within the scope of the usual manufacturing accuracy. The bending levers can then be arranged opposite one another at the same point in the sense that they are at the same distance from the free end of the lower part of the device.

Vorzugsweise ist die in axialer Richtung der Schwenkachse gemessene Dicke der Endabschnitte geringer als die maximale Dicke der ersten Hebelarme. Dabei wird weiter bevorzugt, dass beide Biegeflächen in axialer Richtung der Schwenkachsen dieselbe Erstreckung aufweisen. Während die Biegeflächen möglichst groß sein sollen, um die durch das Blattgut durchgeführten Klammerschenkel zuverlässig zu erfassen, ist es von Vorteil, wenn die Endabschnitte dünner ausgeführt sind, so dass sie beim Biegevorgang gut aneinander vorbei geführt werden können.The thickness of the end sections, measured in the axial direction of the pivot axis, is preferably less than the maximum thickness of the first lever arms. It is further preferred that both bending surfaces have the same extent in the axial direction of the pivot axes. While the bending surfaces should be as large as possible in order to reliably grasp the staple legs passed through the sheet material, it is advantageous if the end sections are made thinner so that they can easily be guided past one another during the bending process.

Die ersten Hebelarme sind zweckmäßig bezüglich einer in der Mitte zwischen den Schwenkachsen senkrecht zu den Klammerstegen der im Klammermagazin aufgenommenen Heftklammern verlaufenden Symmetrieebene spiegelsymmetrisch zueinander angeordnet. Dies erleichtert ein möglichst symmetrisches Umformen der Klammerschenkel. Dabei wird weiter bevorzugt, dass die Dicke der Endabschnitte höchstens halb so groß ist wie die maximale Dicke der ersten Hebelarme, um die Endabschnitte zuverlässig aneinander vorbei bewegen zu können.The first lever arms are expediently arranged mirror-symmetrically to one another with respect to a plane of symmetry running in the middle between the pivot axes perpendicular to the staple webs of the staples accommodated in the staple magazine. This makes it easier to shape the clip legs as symmetrically as possible. It is further preferred that the thickness of the end sections is at most half as large as the maximum thickness of the first lever arms in order to be able to reliably move the end sections past one another.

Die Schwenkachsen sind vorteilhaft in einem solchen Abstand zueinander angeordnet, dass die ersten Hebelarme an den Schneidkanten vorbei beweglich sind. Sie können dann auch nach dem Abtrennen der überschüssigen Endpartien der Klammerschenkel weiter bewegt werden, bis die Klammerschenkel gegen die Rückseite des zusammengehefteten Blattguts gedrückt werden.The pivot axes are advantageously arranged at such a distance from one another that the first lever arms can be moved past the cutting edges. They can then also be moved further after the excess end parts of the staple legs have been cut off, until the staple legs are pressed against the back of the stapled sheet material.

Die Auflageplatte weist zweckmäßig beiderseits des Schneidblocks Öffnungen zum Durchführen der freien Enden der Klammerschenkel nach Durchstoßen des Blattguts auf. Um die Klammerschenkel gegen die Unterseite des zusammengehefteten Blattguts andrücken zu können, sind die Biegeflächen bei Annäherung des Ambossschenkels an das Unterteil vorteilhaft jeweils von einer Ruhestellung, in der sie in einem positiven spitzen Winkel zu einer Auflagefläche an der Oberseite der Auflageplatte angeordnet sind, in eine Klammerstellung verschwenkbar, in der sie parallel oder in einem negativen spitzen Winkel zur Auflagefläche angeordnet sind.The support plate expediently has openings on both sides of the cutting block for the free ends of the clip legs to pass through after the sheet material has been pierced through. In order to be able to press the staple legs against the underside of the stapled sheet material, the bending surfaces are advantageously each moved from a rest position, in which they are arranged at a positive acute angle to a bearing surface on the upper side of the bearing plate, to a Bracket position pivotable, in which they are arranged parallel or at a negative acute angle to the support surface.

Im Folgenden wird die Erfindung anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert. Es zeigen

Fig. 1
ein Heftklammergerät in perspektivischer Darstellung;
Fig. 2
eine im Heftklammergerät gemäß Fig. 1 eingebaute Baugruppe mit einem Schneidblock und zwei Biegehebeln;
Fig. 3a, 3b
die Baugruppe gemäß Fig. 2 in Seitenansicht, wobei eine der Seitenplatten entfernt wurde, mit den Biegehebeln in zwei unterschiedlichen Positionen und
Fig. 4a, 4b
einen Biegehebel in Seitenansicht und in perspektivischer Ansicht.
The invention is explained in more detail below with reference to an exemplary embodiment shown schematically in the drawing. Show it
1
a stapler in a perspective view;
2
one in the stapler according to 1 built-in assembly with a cutting block and two bending levers;
Figures 3a, 3b
the assembly according to 2 in side view with one of the side plates removed, with the bending levers in two different positions and
Figures 4a, 4b
a bending lever in side view and in perspective view.

Das in der Zeichnung dargestellte Heftklammergerät 10 dient dem Zusammenheften von Blattgut mittels Heftklammern 12, die, wie aus Fig. 3a, 3b ersichtlich, jeweils zwei Klammerschenkel 14 und einen die Klammerschenkel 14 miteinander verbindenden, quer zu diesen verlaufenden Klammersteg 16 aufweisen. Die Heftklammern 12 weisen somit die Form eines nach unten offenen U auf, wobei beim Heftvorgang die Klammerschenkel 14 mit ihren freien Enden das Blattgut durchstoßen und auf der Unterseite des Blattguts umgebogen werden.The stapling device 10 shown in the drawing is used for stapling sheet material using staples 12 which, as shown in FIG Figure 3a , 3b as can be seen, each have two clip legs 14 and a clip leg 14 connecting the clip legs 14 to one another and running transversely thereto. The staples 12 thus have the shape of a U which is open at the bottom, with the staple legs 14 piercing the sheet material with their free ends during the stapling process and being bent over on the underside of the sheet material.

Das Heftklammergerät weist ein Unterteil 18 auf, das sich in einer Längsrichtung 20 von einem hinteren Ende 22 zu einem vorderen Ende 24 erstreckt und einen Ambosssschenkel 26 trägt, der am Unterteil 18 gegen eine Rückstellkraft, beispielsweise einer Feder, auf dieses zu beweglich gelagert ist. Im vorliegenden Ausführungsbeispiel ist der Ambossschenkel 26 im Bereich eines nahe dem hinteren Ende 22 angeordneten Lagerbocks 28 verschwenkbar am Unterteil 18 gelagert. Das Heftklammergerät 10 weist zudem eine Klammereinheit 30 auf, die ein Klammermagazin 32 aufweist, in dem die Heftklammern 12 in einer Reihe aneinander liegend angeordnet sind. In dieser Reihe sind die Klammerstege parallel zueinander ausgerichtet, wobei jeder Klammersteg 16 außer dem vordersten und dem hintersten zwischen zwei benachbarten Klammerstegen 16 angeordnet ist und an diesen anliegt. Die Klammereinheit 30 weist zudem einen Handhebel 34 auf, der vom Lagerbock 28 aus schräg nach oben vorsteht und sich in Richtung zum hinteren Ende 22 erstreckt. Am Handhebel 34 ist ein Treiber 36 angeordnet, und der Handhebel 34 ist am Lagerbock 28 gegenüber dem Unterteil 18 und dem Klammermagazin 32 jeweils gegen eine Rückstellkraft nach unten verschwenkbar gelagert. Zudem ist das Klammermagazin 32 am Lagerbock 28 gegenüber dem Unterteil 18 verschwenkbar gelagert. Der Ambossschenkel 26 weist eine Auflageplatte 38 zum Auflegen des Blattguts auf, wobei beim Heftvorgang der Handhebel 34 nach unten gedrückt wird, dabei das Klammermagazin 32 nach unten auf das Blattgut drückt und wobei schließlich unter Aufwendung einer erhöhten Kraft der Treiber 36 die vorderste Heftklammer 12 mit den freien Enden ihrer Klammerschenkel 14 voran durch das Blattgut drückt.The stapler has a lower part 18 which extends in a longitudinal direction 20 from a rear end 22 to a front end 24 and carries an anvil arm 26 which is mounted on the lower part 18 so that it can move against a restoring force, for example a spring, towards the latter. In the present exemplary embodiment, the anvil leg 26 is pivotably mounted on the lower part 18 in the region of a bearing block 28 arranged near the rear end 22 . The stapling device 10 also has a stapling unit 30, which has a staple magazine 32 in which the staples 12 are arranged in a row lying next to one another. In this row, the staple ridges are aligned parallel to one another, with each staple ridge 16 being positioned between and abutting two adjacent staple ridges 16 except for the foremost and rearmost. The clamping unit 30 also has a hand lever 34 which projects obliquely upwards from the bearing block 28 and extends in the direction of the rear end 22 . A driver 36 is arranged on the hand lever 34, and the hand lever 34 is mounted on the bearing block 28 in relation to the lower part 18 and the staple magazine 32 such that it can be pivoted downwards against a restoring force. In addition, the staple magazine 32 is pivotably mounted on the bearing block 28 relative to the lower part 18 . The anvil leg 26 has a bearing plate 38 to place the sheet material, with the hand lever 34 being pressed down during the stapling process, with the staple magazine 32 pressing down on the sheet material and with the driver 36 finally using an increased force to press the foremost staple 12 with the free ends of its staple legs 14 pushes ahead through the leaf material.

Das Heftklammergerät 10 zeichnet sich dadurch aus, dass für Blattgut unterschiedlicher Dicke, im vorliegenden Fall für Blattgut bestehend aus 2 bis 170 Blatt Papier, nur Heftklammern 12 einer einzigen Größe benötigt werden, da überschüssige Endpartien der Klammerschenkel 14 beim Heftvorgang abgeschnitten werden. Zu diesem Zweck trägt der Ambossschenkel einen Schneidblock 40 mit zwei an einander abgewandten Seiten des Schneidblocks 40 angeordneten Schneidkanten 42, wobei eine Projektion der Schneidkanten 42 auf die unterseitige Aufstellfläche 44 des Unterteils 18, mit der das Heftklammergerät 10 flächig auf einer Unterlage, wie beispielsweise einem Schreibtisch, aufstellbar ist, in Längsrichtung 20 verläuft. Somit verlaufen die Schneidkanten 42 auch stets im Rahmen der üblichen Fertigungsgenauigkeiten senkrecht zu den Klammerstegen 16 der im Klammermagazin 32 aufgenommenen Heftklammern 12, da sich die Reihe der Heftklammern 12 in ihrer Projektion auf die Aufstellfläche 44 ebenfalls in Längsrichtung 20 erstreckt. Eine in Fig. 2, 3a, 3b dargestellte Baugruppe 46, zu der der Schneidblock 40 gehört, und die fest mit dem Ambossschenkel 26 verbunden ist, weist zudem zwei zwischen zwei Seitenplatten 48 angeordnete, baugleiche Biegehebel 50 auf. Jeder der Biegehebel 50 ist um eine Schwenkachse 52 verschwenkbar am Ambossschenkel 26 zwischen den Seitenplatten 48 gelagert. Er weist einen ersten Hebelarm 54 auf, der an der Oberseite eine Biegefläche 56 aufweist, sowie einen längeren zweiten Hebelarm 58, der am Unterteil 18 aufliegt. Die Projektion der Schwenkachsen 52 in die Aufstellfläche 44 verläuft dabei in Längsrichtung 20. Die Schwenkachsen 52 verlaufen somit innerhalb der Fertigungstoleranzen senkrecht zu den Klammerstegen 16 der im Klammermagazin 32 aufgenommenen Heftklammern 12.The stapler 10 is characterized in that only staples 12 of a single size are required for sheet material of different thicknesses, in the present case for sheet material consisting of 2 to 170 sheets of paper, since excess end portions of the staple legs 14 are cut off during the stapling process. For this purpose, the anvil arm carries a cutting block 40 with two cutting edges 42 arranged on opposite sides of the cutting block 40, with a projection of the cutting edges 42 onto the underside installation surface 44 of the lower part 18, with which the stapler 10 can be placed flat on a base, such as a Desk that can be set up runs in the longitudinal direction 20. The cutting edges 42 therefore always run perpendicularly to the staple webs 16 of the staples 12 accommodated in the staple magazine 32 within the scope of the usual manufacturing accuracy, since the row of staples 12 also extends in the longitudinal direction 20 in their projection onto the mounting surface 44 . one inside 2 , 3a , 3b The assembly 46 shown, to which the cutting block 40 belongs, and which is firmly connected to the anvil arm 26, also has two identical bending levers 50 arranged between two side plates 48. Each of the bending levers 50 is mounted on the anvil leg 26 between the side plates 48 so that it can pivot about a pivot axis 52 . It has a first lever arm 54 which has a bending surface 56 on the upper side, and a longer second lever arm 58 which rests on the lower part 18 . The projection of the pivot axes 52 into the mounting surface 44 runs in the longitudinal direction 20. The pivot axes 52 thus run within the manufacturing tolerances perpendicular to the staple webs 16 of the staples 12 accommodated in the staple magazine 32.

Beim Niederdrücken des Ambossschenkels 26 in Richtung zum Unterteil 18 während des Heftvorgangs werden die zweiten Hebelarme 58 auf den Boden des Unterteils 18 gedrückt, so dass aus dem Niederdrücken ein Verschwenken der Biegehebel 50 um die Schwenkachsen 52 resultiert. In der in Fig. 1 dargestellten Ruhestellung des Heftklammergeräts 10 befinden sich die Biegehebel 50 ebenfalls in einer Ruhestellung, in der die Biegeflächen 56 in einem positiven spitzen Winkel zu einer Auflagefläche 60 an der Oberseite der Auflageplatte 38 angeordnet sind. Dieser Winkel verkleinert sich beim Heftvorgang, also beim Verschwenken der Biegehebel 50. Dabei kommen die freien Enden der Klammerschenkel 14 nach dem Durchstoßen des Blattguts jeweils auf einer der Biegeflächen 56 zur Anlage, und die durch das Blattgut durchgestoßenen Endabschnitte der Klammerschenkel 14 werden mittels Verschwenken der Biegehebel 50 aufeinander zu umgebogen. Etwaige überschüssige Endpartien der im vorliegenden Ausführungsbeispiel sehr lang ausgeführten Klammerschenkel 14 werden beim Umbiegen von den Biegehebeln 50 gegen die Schneidkanten 42 gedrückt und abgeschnitten. Um an den Biegeflächen 56 zur Anlage kommen zu können, werden die Klammerschenkel 14 nach dem Durchstoßen des Blattguts mit ihren freien Enden durch Öffnungen 62 in der Auflageplatte 38 durchgeführt. Die Schwenkachsen 52 sind in einem solchen Abstand zueinander angeordnet und die ersten Hebelarme 54 sind so dimensioniert, dass letztere beim Verschwenken der Biegehebel 50 an den Schneidkanten 42 vorbei beweglich sind. Die Biegehebel 50 können dann aus der Ruhestellung bis in eine Endstellung verschwenkt werden, in der ihre Biegeflächen 56 parallel oder in einem negativen spitzen Winkel zur Auflagefläche angeordnet sind.When the anvil arm 26 is pressed down in the direction of the lower part 18 during the stapling process, the second lever arms 58 are pressed onto the bottom of the lower part 18 so that the bending levers 50 pivot about the pivot axes 52 as a result of the depression. in the in 1 illustrated rest position of the stapler 10, the bending levers 50 are also in a rest position in which the bending surfaces 56 are arranged at a positive acute angle to a bearing surface 60 on the upper side of the bearing plate 38. This angle decreases during the stapling process, i.e. when the bending lever 50 is pivoted. After the sheet material has been pierced, the free ends of the staple legs 14 each come to rest on one of the bending surfaces 56, and the end sections of the staple legs 14 that have been pierced through the sheet material are bent by pivoting the Bending lever 50 bent towards each other. Any excess end portions of the staple legs 14, which are very long in the present exemplary embodiment, are pressed against the cutting edges 42 by the bending levers 50 during bending and are cut off. In order to be able to come into contact with the bending surfaces 56, the clip legs 14 are passed through openings 62 in the support plate 38 with their free ends after piercing through the sheet material. The pivot axes 52 are arranged at such a distance from one another and the first lever arms 54 are dimensioned such that the latter can be moved past the cutting edges 42 when the bending levers 50 are pivoted. The bending levers 50 can then be pivoted out of the rest position into an end position in which their bending surfaces 56 are arranged parallel or at a negative acute angle to the bearing surface.

Die ersten Hebelarme 54 sind bezüglich einer in der Mitte zwischen den Schwenkachsen 52 in Längsrichtung 20 verlaufenden Symmetrieebene spiegelsymmetrisch zueinander angeordnet. In axialer Richtung der Schwenkachsen 52 weisen die Biegeflächen 56 zudem dieselbe Erstreckung auf. Dagegen weisen die zweiten Hebelarme 58 an ihren freien Enden 64 beginnende und sich ein Stück weit in Richtung zur jeweiligen Schwenkachse 52 erstreckende Endabschnitte 66 auf, deren in axialer Richtung der Schwenkachsen 52 gemessene Dicke geringer ist als die maximale Dicke der ersten Hebelarme, die durch die Erstreckung der Biegefläche 56 in axialer Richtung der Schwenkachsen 52 definiert wird. Die Dicke der Endabschnitte 66 ist dabei kleiner als die Hälfte der maximalen Dicke der ersten Hebelarme 54, so dass die Endabschnitte 66, wie in Fig. 3a, 3b gezeigt, beim Heftvorgang aneinander vorbei bewegt werden können, ohne miteinander zu kollidieren.The first lever arms 54 are arranged mirror-symmetrically to one another with respect to a plane of symmetry running in the middle between the pivot axes 52 in the longitudinal direction 20 . In addition, the bending surfaces 56 have the same extent in the axial direction of the pivot axes 52 . In contrast, the second lever arms 58 have end sections 66 beginning at their free ends 64 and extending a little in the direction of the respective pivot axis 52 , the thickness of which measured in the axial direction of the pivot axes 52 is smaller is the maximum thickness of the first lever arms, which is defined by the extent of the bending surface 56 in the axial direction of the pivot axes 52 . The thickness of the end sections 66 is less than half the maximum thickness of the first lever arms 54, so that the end sections 66, as in Figure 3a , 3b shown, can be moved past each other during the stapling process without colliding with each other.

Zusammenfassend ist Folgendes festzuhalten: Die Erfindung betrifft ein Heftklammergerät 10 zum Zusammenheften von Blattgut mittels Heftklammern 12, die jeweils zwei Klammerschenkel 14 und einen die Klammerschenkel 14 miteinander verbindenden, quer zu diesen verlaufenden Klammersteg 16 aufweisen, mit einem eine Auflageplatte 38 zum Auflegen des Blattguts aufweisenden Ambossschenkel 26, der einen Schneidblock 40 mit zwei Schneidkanten 42 zum Abschneiden von überschüssigen Endpartien der Klammerschenkel 14 trägt, mit einer bezüglich des Ambossschenkels 26 verschwenkbar gelagerten, ein die Heftklammern 12 in einer Reihe mit aneinander anliegenden, parallel zueinander ausgerichteten Klammerstegen 16 aufnehmendes Klammermagazin 32 und einen Treiber 36 zum Durchdrücken einzelner Heftklammern 12 mit den freien Enden ihrer Klammerschenkel 14 voran durch das Blattgut aufweisenden Klammereinheit 30, mit einem Unterteil 18, an dem der Ambossschenkel 26 gegen eine Rückstellkraft auf dieses zu beweglich gelagert ist, und mit zwei um jeweils eine Schwenkachse 52 verschwenkbar am Ambossschenkel 26 gelagerten zweiarmigen Biegehebeln 50, die jeweils einen eine Biegefläche 56 zum Umbiegen der Klammerschenkel 14 aufweisenden ersten Hebelarm 54 und einen zweiten Hebelarm 58 aufweisen, wobei bei Annäherung des Ambossschenkels 26 an das Unterteil 18 die zweiten Hebelarme 58 durch Beaufschlagung mittels des Unterteils 18 um die Schwenkachsen 52 verschwenkt werden und die Biegeflächen 56 die Klammerschenkel 14 aufeinander zu umbiegen und etwaige überschüssige Endpartien durch Andrücken gegen die Schneidkanten 42 abschneiden. Erfindungsgemäß ist vorgesehen, dass die Schwenkachsen 52 im Wesentlichen senkrecht zu den Klammerstegen 16 der im Klammermagazin 32 aufgenommenen Heftklammern 12 verlaufen und dass die zweiten Hebelarme 58 an ihren freien Enden 64 beginnende Endabschnitte 66 aufweisen, die in axialer Richtung der Schwenkachsen 52 so zueinander versetzt angeordnet sind, dass sie sich bei Annäherung des Ambossschenkels 26 an das Unterteil 18 aneinander vorbei bewegen.In summary, the following can be stated: The invention relates to a stapling device 10 for stapling sheet material together by means of staples 12, each of which has two staple legs 14 and a staple web 16 connecting the staple legs 14 to one another and running transversely thereto, with a support plate 38 for placing the sheet material Anvil leg 26, which carries a cutting block 40 with two cutting edges 42 for cutting off excess end portions of staple legs 14, with a staple magazine 32, which is pivotably mounted with respect to anvil leg 26 and accommodates staples 12 in a row with staple webs 16 that rest against one another and are aligned parallel to one another a driver 36 for pressing individual staples 12 with the free ends of their staple legs 14 first through the staple unit 30 comprising the sheet material, with a lower part 18 on which the anvil leg 26 is mounted so that it can move towards it against a restoring force, and with two, each about a pivot axis 52, two-armed bending levers 50 pivotably mounted on the anvil leg 26, each of which has a first lever arm 54 having a bending surface 56 for bending the staple legs 14 and a second lever arm 58, wherein when the anvil leg 26 approaches the lower part 18, the second lever arms 58 are actuated by the action of the The lower part 18 is pivoted about the pivot axes 52 and the bending surfaces 56 bend the clip legs 14 towards one another and cut off any excess end parts by pressing against the cutting edges 42 . According to the invention, it is provided that the pivot axes 52 run essentially perpendicularly to the staple webs 16 of the staples 12 accommodated in the staple magazine 32 and that the second lever arms 58 begin at their free ends 64 Having end sections 66 which are arranged offset from one another in the axial direction of the pivot axes 52 in such a way that they move past one another when the anvil arm 26 approaches the lower part 18 .

Claims (8)

  1. Stapler for stapling sheet material by means of staples (12), each staple (12) having two staple legs (14) and a staple crown (16) interconnecting the staple legs (14) and extending transversely to them, with an anvil arm (26) having a support plate (38) for placing the sheet material thereon, the anvil arm (26) carrying a cutting pad (40) with two cutting edges (42) for cutting off excess end parts of the staple legs (14), with a stapling unit (30) that is pivotally mounted relative to the anvil arm (26), which stapling unit (30) comprises a staple magazine (32) receiving the staples (12) in a row with the staple crowns (16) mutually abutting and being aligned parallel to each other and a driver (36) for pushing individual staples (12) with the free ends of their staple legs (14) first through the sheet material, with a base part (18), on which the anvil arm (16) is mounted movably towards it against a restoring force, and with two two-armed bending levers (50) pivotably mounted on the anvil arm (26) about a respective pivot axis (52), each bending lever (50) having a first lever arm (54) with a bending surface (56) for bending the staple legs (14) and a second lever arm (58), wherein upon approach of the anvil arm (26) to the base part (18), the second lever arms (58) are pivoted by action of the base part (18) about the pivot axes (52) and the bending surfaces (56) bend the staple legs (14) towards each other and cut off any excess end portions by pressing against the cutting edges (42), characterized in that the pivot axes (52) extend substantially perpendicular to the staple crowns (16) of the staples (12) received in the staple magazine (32) and that the second lever arms (58) have end portions (66) beginning at their free ends (64) which are arranged offset to one another in the axial direction of the pivot axes (52) so that they move past one another as the anvil arm (26) approaches the base part (18).
  2. Stapler according to claim 1, characterized in that the thickness of the end portions (66) measured in the axial direction of the pivot axes (52) is smaller than the maximum thickness of the first lever arms (54) measured in the axial direction of the pivot axes (52).
  3. Stapler according to claim 1 or 2, characterized in that both bending surfaces (56) have the same extension in the axial direction of the pivot axes (52).
  4. Stapler according to claim 3, characterized in that the first lever arms (54) are arranged in mirror symmetry to each other with respect to a symmetry plane extending perpendicular to the staple crowns (16) of the staples (12) received in the staple magazine (32) in the middle between the pivot axes (52).
  5. Stapler according to one of the preceding claims, characterized in that the thickness of the end portions (66) is at most half as large as the maximum thickness of the first lever arms (54).
  6. Stapler according to one of the preceding claims, characterized in that the pivot axes (52) are arranged at such a distance from each other, that the first lever arms (54) are movable past the cutting edges (42).
  7. Stapler according to one of the preceding claims, characterized in that the support plate (38) on both sides of the cutting pad (40) has openings (62) for passing through the free ends of the staple legs (14) after piercing the sheet material.
  8. Stapler according to one of the preceding claims, characterized in that the bending surfaces (56) are pivoted upon approach of the anvil arm (26) to the base part (18) in each case from a rest position in which they are arranged at a positive acute angle to a support surface (60) on the upper side of the support plate (38) into a stapling position in which they are arranged parallel or at a negative acute angle to the support surface (60).
EP20771242.3A 2019-10-24 2020-09-07 Stapling device Active EP4010150B8 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019128704.9A DE102019128704A1 (en) 2019-10-24 2019-10-24 Stapler
PCT/EP2020/074902 WO2021078435A1 (en) 2019-10-24 2020-09-07 Stapling device

Publications (3)

Publication Number Publication Date
EP4010150A1 EP4010150A1 (en) 2022-06-15
EP4010150B1 true EP4010150B1 (en) 2023-05-03
EP4010150B8 EP4010150B8 (en) 2023-08-30

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US (1) US11673245B2 (en)
EP (1) EP4010150B8 (en)
JP (1) JP2022553724A (en)
CN (1) CN114630727A (en)
DE (1) DE102019128704A1 (en)
WO (1) WO2021078435A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE85140C (en) *
SE500140C2 (en) * 1992-06-30 1994-04-25 Isaberg Ab Stapler with flattening mechanism
JP2923938B2 (en) * 1995-02-03 1999-07-26 マックス株式会社 Spelling abnormality detection mechanism in stapler
SE522763C2 (en) * 1999-11-19 2004-03-02 Isaberg Rapid Ab Stapler driver intended for mounting in a stapler
SE524128C2 (en) * 2002-01-11 2004-06-29 Isaberg Rapid Ab Hand-operated stapler with drawers cooperating with clip pad for staples
DE602005019972D1 (en) * 2004-01-13 2010-04-29 Max Co Ltd CLAMP MACHINE
SE0400223L (en) * 2004-02-05 2005-02-15 Isaberg Rapid Ab Stapler with locking arrangement
US7108165B2 (en) * 2004-12-08 2006-09-19 Apex Mfg. Co., Ltd. Stapler capable of cutting staple legs one after another
US7334716B2 (en) * 2005-01-26 2008-02-26 Apex Mfg. Co., Ltd. Stapler capable of cutting staple legs one after another
US7159749B2 (en) * 2005-05-31 2007-01-09 Apex Mfg. Co., Ltd. Stapler capable of cutting staple legs
US7124926B1 (en) * 2005-06-09 2006-10-24 Apex Mfg. Co., Ltd. Stapler capable of cutting staple legs
US20070023474A1 (en) * 2005-07-14 2007-02-01 Smith Robert S Clincher for a heavy duty stapler
US10464197B2 (en) * 2012-06-28 2019-11-05 Stanley Fastening Systems, L.P. Carton closing tool having tool-free adjustment members

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DE102019128704A1 (en) 2021-04-29
EP4010150A1 (en) 2022-06-15
WO2021078435A1 (en) 2021-04-29
JP2022553724A (en) 2022-12-26
US11673245B2 (en) 2023-06-13
CN114630727A (en) 2022-06-14
EP4010150B8 (en) 2023-08-30
US20220362914A1 (en) 2022-11-17

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