EP0595257A1 - Apparatus for removing cut-out parts - Google Patents

Apparatus for removing cut-out parts Download PDF

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Publication number
EP0595257A1
EP0595257A1 EP93117328A EP93117328A EP0595257A1 EP 0595257 A1 EP0595257 A1 EP 0595257A1 EP 93117328 A EP93117328 A EP 93117328A EP 93117328 A EP93117328 A EP 93117328A EP 0595257 A1 EP0595257 A1 EP 0595257A1
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EP
European Patent Office
Prior art keywords
stripping
plate
elements
tool
cutting
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.)
Withdrawn
Application number
EP93117328A
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German (de)
French (fr)
Inventor
Rolf Sinn
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.)
Karl Marbach GmbH and Co KG
Original Assignee
Karl Marbach GmbH and Co KG
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 Karl Marbach GmbH and Co KG filed Critical Karl Marbach GmbH and Co KG
Publication of EP0595257A1 publication Critical patent/EP0595257A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1818—Means for removing cut-out material or waste by pushing out
    • 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
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D2007/1881—Means for removing cut-out material or waste using countertools

Definitions

  • the invention relates to a device for removing stripping parts from a sheet of material containing blanks or the like, with a carrier plate for the material sheet and with a tool holding plate which can be moved vertically to and from the carrier plate and on which stripping elements projecting towards the carrier plate are provided.
  • the knockout ends of the knockout elements facing the carrier plate are arranged at a height so that when the tool holding plate moves in the direction of the carrier plate, they strike the corresponding knockout part essentially simultaneously, and this then through a below the knockout part in Push through the opening provided in the carrier plate.
  • the pressure force to be applied by the tool holding plate is proportional to the number of stripping elements.
  • the stripping force of the tool holding plate is therefore not sufficient to remove the stripping parts. Therefore either the weight of the tool plate increased, or an increase in the pressure force can be provided on the tool plate.
  • the known devices are structurally complex to convert.
  • the invention has for its object to provide a structurally simple means for removing stripping parts in which the pressure required to remove the stripping parts of the tool holding plate is low.
  • this invention is achieved according to the invention in that at least two sets of stripping elements are provided.
  • the stripping ends of the stripping elements facing the carrier plate are arranged in a stripping plane in each set.
  • the distance between the break-out planes of the sets and the side of the tool holding plate facing the carrier plate is different.
  • the inventive design of the device for removing stripping parts distributes the total pressure force of the tool holding plate required for removing the stripping parts to the different sets of stripping elements. Therefore, relatively light weight tool holder plates can be used.
  • the required pressure force of the tool holding plate is halved if the distance between the stripping planes is dimensioned such that the stripping ends of the stripping elements of the one set are then on a stripping part attack when the strikers of the stripping elements of the other set have just finished the stripping process.
  • the device for removing stripping parts has a horizontal support plate 12, which is preferably made of wood.
  • a material sheet 14 is arranged on the carrier plate 12 and has previously been processed in a punching and / or grooving device.
  • the material sheet 14 there are several stripping parts 16, 18 which are separated from the rest of the material sheet 14 apart from a few holding points.
  • Cylindrical through openings 20, 24 with vertical side walls are provided below the knockout parts 16, 18.
  • the circumference of the knock-out parts 16, 18 is located on the carrier plate 12.
  • the cylindrical through openings 20, 24 merge downward into a conically widening section 22, 26.
  • a likewise horizontal tool plate 10 is arranged above the carrier plate 12 and can be moved vertically towards and away from the carrier plate 12.
  • a first set of stripping elements 28 and a second set of stripping elements 30 are attached to the tool holding plate 10, only one of which is shown in the drawing.
  • the stripping elements 28, 30 protrude perpendicularly toward the carrier plate 12 from the tool plate 10.
  • the stripping element 28 of the first set has at its end facing away from the carrier plate 12 a fixing shaft 29 which is formed by two legs 31, 32 arranged at right angles to one another.
  • the fixing shank 29 is fastened in a corresponding recess in the tool holding plate 10 by a press fit.
  • the legs 31, 32 have a laterally extending below the tool holding plate 10 Approach 34 or 33, which rests on the underside 44 of the tool holding plate 10.
  • the right-angled design of the fixing shaft 29 gives the stripping element 28 a high moment of resistance to laterally impinging forces.
  • the lugs 33, 34 also prevent the stripping element 28 from being pushed through by the tool holding plate 10 in the event of an intermittent load.
  • One leg 31 of the stripping element 28 merges towards the carrier plate 12 into a plate-shaped stripping section 36.
  • a tip 40 facing the carrier plate 12 is arranged.
  • the knockout element 30 of the second set of knockout elements essentially corresponds to the knockout element 28. It differs in that the distance b of the tip 42 forming the knockout from the underside of the tool holding plate is smaller by the amount a than with the knockout element 28 of the first set.
  • the amount a is chosen such that the stripping element 28 of the first set has just finished its stripping process when the tip 42 of the stripping element 30 of the second set is just engaging the stripping part 16 assigned to it.
  • the stripping elements 28 of the first set therefore first strike the stripping part 18 assigned to them.
  • the break-out part 18 is pressed into the opening 20, the break-out part 18 coming loose at the holding points. If the break-out part 18 through the opening 20 in the conically widening section 22 is pushed through, the stripping element 28 is no longer opposed to resistance.
  • the tip 42 of the stripping element 30 of the second set engages the stripping part 16 assigned to it and also presses it through the corresponding opening 24.
  • the tool holding plate 10 is then moved up again. If one of the stripping parts 16 or 18 sticks to the tips 40 and 42 of the stripping elements 28 or 30, it is stripped off at the transition of the corresponding opening 20 or 24 into the flared portion 22 or 26.
  • the material sheet 14 is conveyed to a further work station and a new material sheet is inserted.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Cutting Devices (AREA)

Abstract

The apparatus is used for removing cut-out parts from a sheet (14) containing blanks or the like. It has a plate (12) for supporting the sheet (14) and a tool-holding plate (10) which can be moved vertically towards the supporting plate (12) and away from it and on which are provided cutting-out elements (28, 30) which project towards the supporting plate (12). In order to reduce the amount of pressure which has to be exerted by the tool-holding plate (10) for the part to be cut out, at least two sets of cutting-out elements (28, 30) are provided. Those cutting-out ends (40) of the cutting-out elements (28, 30) of each set which face the supporting plate (12) are arranged in a cutting-out plane. The distances between the cutting-out planes of the sets and that side of the tool-holding plate (10) which faces the supporting plate (12) are different, however. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Entfernen von Ausbrechteilen aus einem Zuschnitte oder dergleichen enthaltenden Werkstoffbogen mit einer Trägerplatte für den Werkstoffbogen und mit einer vertikal zur Trägerplatte hin- und von ihr wegbewegbaren Werkzeughalteplatte, an der zur Trägerplatte hin vorstehende Ausbrechelemente vorgesehen sind.The invention relates to a device for removing stripping parts from a sheet of material containing blanks or the like, with a carrier plate for the material sheet and with a tool holding plate which can be moved vertically to and from the carrier plate and on which stripping elements projecting towards the carrier plate are provided.

Bei herkömmlichen Vorrichtungen zum Entfernen von Ausbrechteilen sind die der Trägerplatte zugewandten Ausbrechenden der Ausbrechelemente auf einer Höhe angeordnet, so daß sie bei einer Bewegung der Werkzeughalteplatte in Richtung der Trägerplatte im wesentlichen gleichzeitig auf das entsprechende Ausbrechteil auftreffen, und dieses dann durch eine unterhalb des Ausbrechteils in der Trägerplatte vorgesehene Durchbrechöffnung durchdrücken. Bei der Bearbeitung eines Werkstoffbogens mit einer Vielzahl von gleichgroßen Öffnungen ist dabei die von der Werkzeughalteplatte aufzubringende Druckkraft proportional zur Anzahl der Ausbrechelemente. Bei Werkstoffbögen, die eine hohe Anzahl von zu entfernenden Ausbrechteilen aufweisen, wie zum Beispiel bei Werkstoffbögen zur Fertigung von Packungen für Antibabypillen, reicht daher die Ausbrechkraft der Wekzeughalteplatte nicht zum Entfernen der Ausbrechteile aus. Daher muß entweder das Gewicht der Werkzeugplatte erhöht, oder eine Erhöhung der Druckkraft an der Werkzeugplatte vorgesehen werden. Die bekannten Vorrichtungen sind dafür konstruktiv aufwendig umzubauen.In conventional devices for removing knockout parts, the knockout ends of the knockout elements facing the carrier plate are arranged at a height so that when the tool holding plate moves in the direction of the carrier plate, they strike the corresponding knockout part essentially simultaneously, and this then through a below the knockout part in Push through the opening provided in the carrier plate. When processing a sheet of material with a large number of openings of the same size, the pressure force to be applied by the tool holding plate is proportional to the number of stripping elements. In the case of material sheets which have a large number of stripping parts to be removed, such as, for example, material sheets for the manufacture of packs for birth control pills, the stripping force of the tool holding plate is therefore not sufficient to remove the stripping parts. Therefore either the weight of the tool plate increased, or an increase in the pressure force can be provided on the tool plate. The known devices are structurally complex to convert.

Der Erfindung liegt die Aufgabe zugrunde, mit konstruktiv einfachen Mitteln eine Vorrichtung zum Entfernen von Ausbrechteilen zu schaffen, bei der die zum Entfernen der Ausbrechteile erforderliche Druckkraft der Werkzeughalteplatte gering ist.The invention has for its object to provide a structurally simple means for removing stripping parts in which the pressure required to remove the stripping parts of the tool holding plate is low.

Diese Erfindung wird ausgehend von dem gattungsgemäßen Stand der Technik erfindungsgemäß dadurch gelöst, daß wenigstens zwei Sätze von Ausbrechelementen vorgesehen sind. Die der Trägerplatte zugewandten Ausbrechenden der Ausbrechelemente sind in jedem Satz in einer Ausbrechebene angeordnet. Der Abstand der Ausbrechebenen der Sätze zu der der Trägerplatte zugewandten Seite der Werkzeughalteplatte ist verschieden.Starting from the generic state of the art, this invention is achieved according to the invention in that at least two sets of stripping elements are provided. The stripping ends of the stripping elements facing the carrier plate are arranged in a stripping plane in each set. The distance between the break-out planes of the sets and the side of the tool holding plate facing the carrier plate is different.

Durch die erfindungsgemäße Ausgestaltung der Vorrichtung zum Entfernen von Ausbrechteilen wird die zum Entfernen der Ausbrechteile erforderliche Gesamtdruckkraft der Werkzeughalteplatte auf die verschiedenen Sätze an Ausbrechelementen verteilt. Daher können Werkzeughalteplatten mit verhältnismäßig geringem Gewicht verwendet werden.The inventive design of the device for removing stripping parts distributes the total pressure force of the tool holding plate required for removing the stripping parts to the different sets of stripping elements. Therefore, relatively light weight tool holder plates can be used.

Für den Fall, daß zwei Sätze von Ausbrechelementen vorhanden sind, die jeweils die gleiche Anzahl von Ausbrechteilen entfernen, wird die erforderliche Druckkraft der Werkzeughalteplatte halbiert, wenn der Abstand der Ausbrechebenen so bemessen ist, daß die Ausbrechenden der Ausbrechelemente des einen Satzes dann an einem Ausbrechteil angreifen, wenn die Ausbrechenden der Ausbrechelemente des anderen Satzes gerade den Ausbrechvorgang beendet haben.In the event that there are two sets of stripping elements that each remove the same number of stripping parts, the required pressure force of the tool holding plate is halved if the distance between the stripping planes is dimensioned such that the stripping ends of the stripping elements of the one set are then on a stripping part attack when the strikers of the stripping elements of the other set have just finished the stripping process.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung erläutert, die einen Teil einer Vorrichtung zum Entfernen von Ausbrechteilen im Querschnitt zeigt.An embodiment of the invention is explained below with reference to the drawing, which shows part of a device for removing stripping parts in cross section.

Die Vorrichtung zum Entfernen von Ausbrechteilen weist eine horizontale Trägerplatte 12 auf, die vorzugsweise aus Holz besteht. Auf der Trägerplatte 12 ist ein Werkstoffbogen 14 angeordnet, der zuvor in einer Stanz- und/oder Rilleneinrichtung bearbeitet worden ist. In dem Werkstoffbogen 14 sind mehrere Ausbrechteile 16, 18 vorhanden, die bis auf wenige Haltepunkte von dem restlichen Werkstoffbogen 14 getrennt sind. Unterhalb der Ausbrechteile 16, 18 sind zylindrische Durchbrechöffnungen 20, 24 mit vertikalen Seitenwänden vorgesehen. Der Umfang der Ausbrechteile 16, 18 befindet sich auf der Trägerplatte 12. Die zylindrischen Durchbrechöffnungen 20, 24 gehen nach unten in einen sich konisch erweiternden Abschnitt 22, 26 über.The device for removing stripping parts has a horizontal support plate 12, which is preferably made of wood. A material sheet 14 is arranged on the carrier plate 12 and has previously been processed in a punching and / or grooving device. In the material sheet 14 there are several stripping parts 16, 18 which are separated from the rest of the material sheet 14 apart from a few holding points. Cylindrical through openings 20, 24 with vertical side walls are provided below the knockout parts 16, 18. The circumference of the knock-out parts 16, 18 is located on the carrier plate 12. The cylindrical through openings 20, 24 merge downward into a conically widening section 22, 26.

Oberhalb der Trägerplatte 12 ist eine ebenfalls horizontale Werkzeugplatte 10 angeordnet, die vertikal zur Trägerplatte 12 hin und von ihr weg bewegbar ist. An der Werkzeughalteplatte 10 ist ein erster Satz von Ausbrechelementen 28 und ein zweiter Satz von Ausbrechelementen 30 angebracht, von denen in der Zeichnung jeweils nur eines gezeigt ist. Die Ausbrechelemente 28, 30 stehen zur Trägerplatte 12 hin senkrecht aus der Werkzeugplatte 10 hervor.A likewise horizontal tool plate 10 is arranged above the carrier plate 12 and can be moved vertically towards and away from the carrier plate 12. A first set of stripping elements 28 and a second set of stripping elements 30 are attached to the tool holding plate 10, only one of which is shown in the drawing. The stripping elements 28, 30 protrude perpendicularly toward the carrier plate 12 from the tool plate 10.

Das Ausbrechelement 28 des ersten Satzes weist an seinem der Trägerplatte 12 abgewandten Ende einen Fixierschaft 29 auf, der von zwei rechtwinklig zueinander angeordneten Schenkeln 31, 32 gebildet wird. Der Fixierschaft 29 ist in einer entsprechenden Ausnehmung in der Werkzeughalteplatte 10 durch Pressitz befestigt. Die Schenkel 31, 32 weisen unterhalb der Werkzeughalteplatte 10 einen sich seitlich erstreckenden Ansatz 34 bzw. 33 auf, der an der Unterseite 44 der Werkzeughalteplatte 10 anliegt. Die rechtwinklige Ausbildung des Fixierschaftes 29 verleiht dem Ausbrechelement 28 ein hohes Widerstandsmoment gegen seitlich auftreffende Kräfte. Die Ansätze 33, 34 verhindern darüberhinaus, daß das Ausbrechelement 28 bei einer stoßweisen Belastung durch die Werkzeughalteplatte 10 durchgedrückt wird.The stripping element 28 of the first set has at its end facing away from the carrier plate 12 a fixing shaft 29 which is formed by two legs 31, 32 arranged at right angles to one another. The fixing shank 29 is fastened in a corresponding recess in the tool holding plate 10 by a press fit. The legs 31, 32 have a laterally extending below the tool holding plate 10 Approach 34 or 33, which rests on the underside 44 of the tool holding plate 10. The right-angled design of the fixing shaft 29 gives the stripping element 28 a high moment of resistance to laterally impinging forces. The lugs 33, 34 also prevent the stripping element 28 from being pushed through by the tool holding plate 10 in the event of an intermittent load.

Der eine Schenkel 31 des Ausbrechelements 28 geht zur TRägerplatte 12 hin in einen plattenförmigen Ausbrechabschnitt 36 über. In der Mitte der vertikalen Schmalseiten des Ausbrechabschnittes 36 ist jeweils eine der Trägerplatte 12 zugewandte Spitze 40 angeordnet.One leg 31 of the stripping element 28 merges towards the carrier plate 12 into a plate-shaped stripping section 36. In the middle of the vertical narrow sides of the stripping section 36, a tip 40 facing the carrier plate 12 is arranged.

Das Ausbrechelement 30 des zweiten Satzes an Ausbrechelementen entspricht im wesentlichen dem Ausbrechelement 28. Es unterscheidet sich dadurch, daß der Abstand b der das Ausbrechende bildenden Spitze 42 von der Unterseite der Werkzeughalteplatte um den Betrag a geringer ist als bei dem Ausbrechelement 28 des ersten Satzes.The knockout element 30 of the second set of knockout elements essentially corresponds to the knockout element 28. It differs in that the distance b of the tip 42 forming the knockout from the underside of the tool holding plate is smaller by the amount a than with the knockout element 28 of the first set.

Wie es durch die gestrichelten Linien angedeutet ist, ist der Betrag a so gewählt, daß das Ausbrechelement 28 des ersten Satzes gerade seinen Ausbrechvorgang beendet hat, wenn die Spitze 42 des Ausbrechelements 30 des zweiten Satzes gerade an dem ihm zugeordneten Ausbrechteil 16 angreift.As indicated by the dashed lines, the amount a is chosen such that the stripping element 28 of the first set has just finished its stripping process when the tip 42 of the stripping element 30 of the second set is just engaging the stripping part 16 assigned to it.

Bei einer Bewegung der Werkzeughalteplatte 10 nach unten treffen demnach zuerst die Ausbrechelemente 28 des ersten Satzes auf das ihnen zugeordnete Ausbrechteil 18 auf. Bei einer weiteren Bewegung der Werkzeughalteplatte 10 wird das Ausbrechteil 18 in die Durchbrechöffnung 20 gedrückt, wobei sich das Ausbrechteil 18 an den Haltepunkten löst. Wenn das Ausbrechteil 18 durch die Durchbrechöffnung 20 in den sich konisch erweiternden Abschnitt 22 durchgedrückt ist, wird dem Ausbrechelement 28 kein Widerstand mehr entgegengesetzt.When the tool holding plate 10 moves downward, the stripping elements 28 of the first set therefore first strike the stripping part 18 assigned to them. With a further movement of the tool holding plate 10, the break-out part 18 is pressed into the opening 20, the break-out part 18 coming loose at the holding points. If the break-out part 18 through the opening 20 in the conically widening section 22 is pushed through, the stripping element 28 is no longer opposed to resistance.

Zu diesem Zeitpunkt greift die Spitze 42 des Ausbrechelements 30 des zweiten Satzes an dem ihm zugeordneten Ausbrechteil 16 an und drückt dieses ebenfalls durch die entsprechende Durchbrechöffnung 24.At this time, the tip 42 of the stripping element 30 of the second set engages the stripping part 16 assigned to it and also presses it through the corresponding opening 24.

Anschließend wird die Werkzeughalteplatte 10 wieder nach oben bewegt. Falls eines der Ausbrechteile 16 bzw. 18 an den Spitzen 40 und 42 der Ausbrechelemente 28 bzw. 30 hängenbleibt, wird dieses am Übergang der entsprechenden Durchbrechöffnung 20 bzw. 24 in den konisch erweiterten Abschnitt 22 bzw. 26 abgestreift. Wenn die Werkzeughalteplatte 10 ihre obere Stellung erreicht, wird der Werkstoffbogen 14 in eine weitere Arbeitsstation befördert und ein neuer Werkstoffbogen eingelegt.The tool holding plate 10 is then moved up again. If one of the stripping parts 16 or 18 sticks to the tips 40 and 42 of the stripping elements 28 or 30, it is stripped off at the transition of the corresponding opening 20 or 24 into the flared portion 22 or 26. When the tool holder plate 10 reaches its upper position, the material sheet 14 is conveyed to a further work station and a new material sheet is inserted.

Claims (2)

Vorrichtung zum Entfernen von Ausbrechteilen aus einem Zuschnitte oder dergleichen enthaltenden Werkstoffbogen (14) mit einer Trägerplatte (12) für den Werkstoffbogen (14) und mit einer vertikal zur Trägerplatte (12) hin und von ihr weg bewegbaren Werkzeughalteplatte (10), an der zur Trägerplatte (12) hin vorstehenden Ausbrechelemente (28, 30) vorgesehen sind, dadurch gekennzeichnet, - daß wenigstens zwei Sätze von Ausbrechelementen (28, 30) vorgesehen sind, - daß die der Trägerplatte (12) zugewandten Ausbrechenden (40) der Ausbrechelemente (28, 30) jedes Satzes in einer Ausbrechebene angeordnet sind und - daß der Abstand der Ausbrechebenen der Sätze zu der der Trägerplatte (12) zugewandten Seite der Werkzeughalteplatte (10) verschieden ist. Device for removing knock-out parts from a sheet of material (14) containing blanks or the like, with a support plate (12) for the sheet of material (14) and with a tool holding plate (10) which can be moved vertically towards and away from the support plate (12), on which Support plate (12) protruding stripping elements (28, 30) are provided, characterized in that - That at least two sets of stripping elements (28, 30) are provided, - That the carrier plate (12) facing stripping ends (40) of the stripping elements (28, 30) of each set are arranged in a stripping plane and - That the distance of the break-out planes of the sets to the side of the tool holder plate (10) facing the carrier plate (12) is different. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Abstand (b) der Ausbrechebenen zur Werkzeughalteplatte (10) so bemessen ist, daß die Ausbrechenden (42) der Ausbrechelemente (30) eines Satzes dann an einem Ausbrechteil (16) angreifen, wenn die Ausbrechenden (40) der Ausbrechelemente (28) des anderen Satzes gerade den Ausbrechvorgang beendet haben.Apparatus according to claim 1, characterized in that the distance (b) between the stripping planes and the tool holding plate (10) is such that the strikers (42) of the stripping elements (30) of a set act on a stripping part (16) when the strippers (40) of the stripping elements (28) of the other set have just finished the stripping process.
EP93117328A 1992-10-27 1993-10-26 Apparatus for removing cut-out parts Withdrawn EP0595257A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4236276 1992-10-27
DE19924236276 DE4236276A1 (en) 1992-10-27 1992-10-27 Device for removing stripped parts

Publications (1)

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EP0595257A1 true EP0595257A1 (en) 1994-05-04

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EP93117328A Withdrawn EP0595257A1 (en) 1992-10-27 1993-10-26 Apparatus for removing cut-out parts

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EP (1) EP0595257A1 (en)
DE (1) DE4236276A1 (en)
FI (1) FI934754A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1589879A (en) * 1968-10-23 1970-04-06
US4706533A (en) * 1986-05-29 1987-11-17 Giulie Joe D Shear punch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1589879A (en) * 1968-10-23 1970-04-06
US4706533A (en) * 1986-05-29 1987-11-17 Giulie Joe D Shear punch

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Publication number Publication date
FI934754A (en) 1994-04-28
DE4236276A1 (en) 1994-04-28
FI934754A0 (en) 1993-10-27

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