EP0279193A2 - Paper punch - Google Patents

Paper punch Download PDF

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Publication number
EP0279193A2
EP0279193A2 EP88100745A EP88100745A EP0279193A2 EP 0279193 A2 EP0279193 A2 EP 0279193A2 EP 88100745 A EP88100745 A EP 88100745A EP 88100745 A EP88100745 A EP 88100745A EP 0279193 A2 EP0279193 A2 EP 0279193A2
Authority
EP
European Patent Office
Prior art keywords
pressure
punch
pressure plate
upper edge
letter
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
EP88100745A
Other languages
German (de)
French (fr)
Other versions
EP0279193B1 (en
EP0279193A3 (en
Inventor
Gerhard Sixt
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.)
Louis Leitz Firma
Original Assignee
Louis Leitz Firma
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 Louis Leitz Firma filed Critical Louis Leitz Firma
Priority to AT88100745T priority Critical patent/ATE75990T1/en
Publication of EP0279193A2 publication Critical patent/EP0279193A2/en
Publication of EP0279193A3 publication Critical patent/EP0279193A3/en
Application granted granted Critical
Publication of EP0279193B1 publication Critical patent/EP0279193B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/32—Hand-held perforating or punching apparatus, e.g. awls
    • B26F1/36—Punching or perforating pliers

Definitions

  • the invention relates to a punch hole punch with a die for punching lower part and a pivotally mounted on cheek of the lower part, by means of a pressure member acting on the punch in axial guides of the lower part against the restoring force of coil springs pressure plate.
  • convexly curved pressure members are arranged either on the underside of the pressure plate designed as a one-armed lever, which abut against the flat or convexly curved end face of the punch.
  • the contact between the pressure members and the punch is therefore point or line-shaped, so that relatively high surface pressures occur.
  • the object of the invention is to improve the letter punch of the type specified at the outset in such a way that the occurrence of the frictional forces aggravating the actuation of the letter punch is avoided.
  • the invention is based on the idea that the pressure plate should not act directly, but indirectly via a pressure element which can be pivoted with respect to the pressure plate and the punch, in order to avoid the undesirable transverse friction forces when actuating the punch.
  • the pressure member is formed by a pressure rail aligned parallel to the pivot axis of the pressure plate, with its upper edge resting against the pressure plate and pivotable there, on the lower edge of which two downward-facing, engaging in cup-like depressions of the punch heads and engaging with its tip pivotally supporting pressure pins are arranged against the bottom.
  • the punch heads attached to the punch form a thickening which has an annular shoulder which serves as an abutment for the helical spring.
  • an elevation serving as an attachment to the upper edge of the pressure rail is provided on the underside of the pressure plate on at least one longitudinal side of the pressure rail.
  • a groove can also be provided in the pressure plate, into which the pressure rail engages with its upper edge.
  • the pressure rail is articulated with play in the region of its upper edge on side cheeks of the pressure plate.
  • the pressure rail can also protrude in the area of its upper edge in the recesses in the side cheeks of the pressure plate
  • the pins preferably rest with their lower edge against the lower recess edge.
  • the letter punch shown in the drawing consists essentially of a lower part 1 provided with side cheeks 2 and a pressure plate 3 hinged to the side cheeks 2 of the lower part 1.
  • the punch 4 is in its lower area in recesses 22 and in its upper, a wider head 7th having area between tabs 21 which are bent from the side cheeks 2 out.
  • a pressure rail 5 is provided which is aligned parallel to the pivot axis 32 of the pressure plate 3 and which has an upper edge in the region of one which is inwardly white Send bend 31 formed groove 33 abuts against the pressure plate 3, and on the lower edge 54 two downward, engaging in cup-like recesses 71 of the punch heads 7 and with their tip pivotally supporting pressure pegs are arranged.
  • the pressure rail 5 is provided in the region of its upper edge with pins 51 which protrude at the end and engage in recesses 35 in the side walls 36 of the pressure plate 3 with play.
  • the pins 51 are primarily used to prevent the punch 4 from losing contact with the pressure plate 3 if the punches 4 become jammed in the documents to be punched. Since, when the pressure plate 3 is actuated, the pressure rail 5 neither slides on the underside of the pressure plate 3 nor in the head 7 of the punch 4, but only executes a tilting movement, a perfect and lossless power transmission from the pressure plate 3 to the punch 4 is ensured.
  • the punch 4 are enclosed by a coil spring 6, the lower abutment is formed by a horizontal part of the lower part of the punch and the upper abutment by the annular shoulder of the head 7 of the punch 4.

Abstract

The paper punch consists essentially of a lower part (1) equipped with side cheeks (2) and of a pressure plate (3) articulated on the side cheeks (2). Pressure is transmitted between the pressure plate (3) and hole punches (4) by means of a pressure bar (5) which is parallel to the pivot axis (32) of the pressure plate (3), bears with its upper edge against the pressure plate (3) and on its lower edge (53) has two downwardly pointing pressure studs (52) engaging into cup-like recesses (71) of the hole-punch heads (7) and being supported pivotably with their tip against the bottoms of these. <IMAGE>

Description

Die Erfindung betrifft einen Brieflocher mit einem Matrizen für Lochstempel aufweisenden Unterteil und einer an Wangendes Unterteils schwenkbar gelagerten, mittels eines Druckorgans auf die in Axialführungen des Unterteils geführten Lochstempel entgegen der Rück­stellkraft von Schraubenfedern wirkenden Druckplatte.The invention relates to a punch hole punch with a die for punching lower part and a pivotally mounted on cheek of the lower part, by means of a pressure member acting on the punch in axial guides of the lower part against the restoring force of coil springs pressure plate.

Bei Brieflochern dieser Art sind entweder an der Unter­seite der als einarmiger Hebel ausgebildeten Druck­platte konvex gekrümmte Druckorgane angeordnet, die gegen die ebene oder konvex gekrümmte Stirnfläche der Lochstempel anliegen. Die Berührung zwischen den Druck­organen und den Lochstempeln ist daher punkt- oder linienförmig, so daß verhältnismäßig hohe Flächendrücke auftreten. Beim Niederdrücken der Druckplatte ergeben sich deshalb zwischen Druckorgan und Lochstempel große Reibungskräfte, die auf die Lochstempel ein Kippmoment ausüben, das wiederum eine die Betätigung des Brief­lochers beeinträchtigende Gleitreibung der Lochstempel in ihren Axialführungen hervorruft.In letter punches of this type, convexly curved pressure members are arranged either on the underside of the pressure plate designed as a one-armed lever, which abut against the flat or convexly curved end face of the punch. The contact between the pressure members and the punch is therefore point or line-shaped, so that relatively high surface pressures occur. When the pressure plate is pressed down, there are therefore large frictional forces between the pressure element and the punch, which exert a tilting moment on the punch, which in turn causes sliding friction of the punch in its axial guides which affects the operation of the punch hole.

Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, den Brieflocher der eingangs angegebenen Art dahingehend zu verbessern, daß das Auftreten der die Betätigung des Brieflochers erschwerenden Reibungs­kräfte vermieden wird.Proceeding from this, the object of the invention is to improve the letter punch of the type specified at the outset in such a way that the occurrence of the frictional forces aggravating the actuation of the letter punch is avoided.

Zur Lösung dieser Aufgabe werden die im Patentan­spruch 1 angegebenen Merkmale vorgeschlagen. Weitere vorteilhafte Ausgestaltungen und Weiterbildungen des Erfindungsgedankens ergeben sich aus den Unteransprü­chen.To achieve this object, the features specified in claim 1 are proposed. Further advantageous refinements and developments of the inventive concept result from the subclaims.

Die Erfindung geht von dem Gedanken aus, daß die Druck­platte nicht unmittelbar, sondern mittelbar über ein gegenüber der Druckplatte und den Lochstempeln ver­schwenkbares Druckorgan auf die Lochstempel einwirken sollte, um die unerwünschten Querreibungskräfte bei der Locherbetätigung zu vermeiden. Dementsprechend wird gemäß der Erfindung vorgeschlagen, daß das Druck­organ durch eine parallel zur Schwenkachse der Druck­platte ausgerichtete, mit ihrer Oberkante gegen die Druckplatte anliegende und dort pendelartig verschwenk­bare Druckschiene gebildet ist, an deren Unterkante zwei nach unten weisende, in napfartige Vertiefungen der Lochstempelköpfe eingreifende und sich mit ihrer Spitze gegen deren Boden schwenkbar abstützende Druck­zapfen angeordnet sind. Wenn die Lochstempel im Bereich ihres Kopfes in einer Axialführung des Unterteils geführt sind, werden bei der Locherbetätigung keine Biege-momente auf die Lochstempel ausgeübt, so daß die durch die Locherbetätigung hervorgerufene Gleitreibung in den Axialführungen vernachlässigbar ist. Vorteil­hafterweise bilden die am Lochstempel angeschlagenen Lochstempelköpfe eine Verdickung, die eine der Schrau­benfeder als Widerlager dienende Ringschulter aufweist.The invention is based on the idea that the pressure plate should not act directly, but indirectly via a pressure element which can be pivoted with respect to the pressure plate and the punch, in order to avoid the undesirable transverse friction forces when actuating the punch. Accordingly It is proposed according to the invention that the pressure member is formed by a pressure rail aligned parallel to the pivot axis of the pressure plate, with its upper edge resting against the pressure plate and pivotable there, on the lower edge of which two downward-facing, engaging in cup-like depressions of the punch heads and engaging with its tip pivotally supporting pressure pins are arranged against the bottom. If the punches are guided in an axial guide of the lower part in the area of their head, no bending moments are exerted on the punches when the punch is actuated, so that the sliding friction in the axial guides caused by the punch actuation is negligible. Advantageously, the punch heads attached to the punch form a thickening which has an annular shoulder which serves as an abutment for the helical spring.

Gemäß einer bevorzugten Ausgestaltung der Erfindung ist an der Unterseite der Druckplatte mindestens auf einer Längsseite der Druckschiene eine der Oberkante der Druckschiene als Anlage dienende Erhebung vor­gesehen. Anstelle der einseitigen Erhebung kann in der Druckplatte auch eine Rinne vorgesehen sein, in die die Druckschiene mit ihrer Oberkante eingreift.According to a preferred embodiment of the invention, an elevation serving as an attachment to the upper edge of the pressure rail is provided on the underside of the pressure plate on at least one longitudinal side of the pressure rail. Instead of the one-sided elevation, a groove can also be provided in the pressure plate, into which the pressure rail engages with its upper edge.

Gemäß einer weiteren vorteilhaften Ausgestaltung der Erfindung ist die Druckschiene im Bereich ihrer Ober­kante an Seitenwangen der Druckplatte mit Spiel an­gelenkt. Die Druckschiene kann zu diesem Zweck im Bereich ihrer Oberkante stirnseitig überstehende, in Aussparungen in den Seitenwangen der Druckplatte mit Spiel eingreifende Zapfen aufweisen, wobei die Zapfen bevorzugt mit ihrer Unterkante gegen den unteren Aus­sparungsrand anliegen. Mit diesen Maßnahmen wird gewährleistet, daß die Druckschiene in jedem Falle zu­sammen mit der Druckplatte in ihre Ausgangslage zurück­gezogen wird und nicht herausfallen kann, wenn einer der Lochstempel beispielsweise in einem dicken, festen Papierstapel trotz Einwirkung der Rückstellfeder hängenbleiben sollte.According to a further advantageous embodiment of the invention, the pressure rail is articulated with play in the region of its upper edge on side cheeks of the pressure plate. For this purpose, the pressure rail can also protrude in the area of its upper edge in the recesses in the side cheeks of the pressure plate Have play engaging pins, the pins preferably rest with their lower edge against the lower recess edge. These measures ensure that the pressure rail is always retracted into its initial position together with the pressure plate and cannot fall out if one of the punches should get caught, for example, in a thick, solid stack of paper despite the action of the return spring.

Im folgenden wird die Erfindung anhand des in der Zeichnung in schematischer Weise dargestellten Aus­führungsbeispiels näher erläutert. Es zeigen

  • Fig. 1 einen senkrechten Längsschnitt durch einen Brieflocher in der Ebene eines Lochstempels;
  • Fig. 2 einen senkrechten Querschnitt durch den Brieflocher, in der die Lochstempel verbin­denden Ebene.
The invention is explained in more detail below with reference to the exemplary embodiment shown schematically in the drawing. Show it
  • 1 shows a vertical longitudinal section through a letter punch in the plane of a punch.
  • Fig. 2 shows a vertical cross section through the letter punch, in the plane connecting the punch.

Der in der Zeichnung dargestellte Brieflocher besteht im wesentlichen aus einem mit Seitenwangen 2 versehenen Unterteil 1 sowie einer an den Seitenwangen 2 des Unterteils 1 angelenkten Druckplatte 3. Die Lochstempel 4 werden in ihrem unteren Bereich in Aussparungen 22 und in ihrem oberen, einen breiteren Kopf 7 aufwei­senden Bereich zwischen Lappen 21, die aus den seit­lichen Wangen 2 abgebogen sind, geführt. Weiter ist eine parallel zur Schwenkachse 32 der Druckplatte 3 ausgerichtete Druckschiene 5 vorgesehen, die mit ihrer Oberkante im Bereich einer durch eine nach innen wei­ sende Abbiegung 31 gebildeten Rinne 33 gegen die Druck­platte 3 anliegt, und an deren Unterkante 54 zwei nach unten weisende, in napfartige Vertiefungen 71 der Lochstempelköpfe 7 eingreifende und sich mit ihrer Spitze gegen den Boden schwenkbar abstützende Druck­zapfen angeordnet sind. Weiter ist die Druckschiene 5 im Bereich ihrer Oberkante mit stirnseitig überstehen­den, in Aussparungen 35 in den Seitenwangen 36 der Druckplatte 3 mit Spiel eingreifenden Zapfen 51 ver­sehen. Die Zapfen 51 dienen in erster Linie dazu, bei einem etwaigen Klemmen der Lochstempel 4 in dem zu lochenden Schriftgut zu verhindern, daß die Druck­schiene 5 ihren Kontakt mit der Druckplatte 3 verliert. Da bei Betätigung der Druckplatte 3 die Druckschiene 5 weder an der Unterseite der Druckplatte 3 noch im Kopf 7 der Lochstempel 4 gleitet, sondern lediglich eine Kippbewegung ausführt, ist eine einwandfreie und ver­lustlose Kraftübertragung von der Druckplatte 3 auf die Lochstempel 4 gewährleistet. Die Lochstempel 4 werden von einer Schraubenfeder 6 umschlossen, deren unteres Widerlager durch einen waagerechten Teil des Locherunterteils und deren oberes Widerlager durch die Ringschulter des Kopfes 7 der Lochstempel 4 gebildet wird.The letter punch shown in the drawing consists essentially of a lower part 1 provided with side cheeks 2 and a pressure plate 3 hinged to the side cheeks 2 of the lower part 1. The punch 4 is in its lower area in recesses 22 and in its upper, a wider head 7th having area between tabs 21 which are bent from the side cheeks 2 out. Furthermore, a pressure rail 5 is provided which is aligned parallel to the pivot axis 32 of the pressure plate 3 and which has an upper edge in the region of one which is inwardly white Send bend 31 formed groove 33 abuts against the pressure plate 3, and on the lower edge 54 two downward, engaging in cup-like recesses 71 of the punch heads 7 and with their tip pivotally supporting pressure pegs are arranged. Furthermore, the pressure rail 5 is provided in the region of its upper edge with pins 51 which protrude at the end and engage in recesses 35 in the side walls 36 of the pressure plate 3 with play. The pins 51 are primarily used to prevent the punch 4 from losing contact with the pressure plate 3 if the punches 4 become jammed in the documents to be punched. Since, when the pressure plate 3 is actuated, the pressure rail 5 neither slides on the underside of the pressure plate 3 nor in the head 7 of the punch 4, but only executes a tilting movement, a perfect and lossless power transmission from the pressure plate 3 to the punch 4 is ensured. The punch 4 are enclosed by a coil spring 6, the lower abutment is formed by a horizontal part of the lower part of the punch and the upper abutment by the annular shoulder of the head 7 of the punch 4.

Claims (9)

1. Brieflocher mit einem Matrizen für Lochstempel aufweisenden Unterteil und einer an Wangen des Unterteils schwenkbar gelagerten, mittels eines Druckorgans auf die in Axialführungen des Unter­teils geführten Lochstempel entgegen der Rück­stellkraft von Schraubenfedern wirkenden Druck­platte, dadurch gekennzeichnet, daß das Druckorgan durch eine parallel zur Schwenkachse (32) der Druckplatte (3) ausgerichtete, mit ihrer Oberkante gegen die Druckplatte (3) anliegende und dort pendelartig verschwenkbare Druckschiene gebildet ist, an deren Unterkante (53) zwei nach unten weisende, in napfartige Vertiefungen (71) der Lochstempelköpfe (7) eingreifende und sich mit ihrer Spitze gegen deren Boden schwenkbar abstüt­zende Druckzapfen (52) angeordnet sind.1. letter punch with a die for a punch having a lower part and a pivotally mounted on the cheeks of the lower part, by means of a pressure element acting on the hole punches guided in axial guides of the lower part against the restoring force of coil springs, characterized in that the pressure element is parallel to the pivot axis ( 32) of the pressure plate (3) aligned, formed with its upper edge against the pressure plate (3) and there pendulum-like pivotable pressure rail, on the lower edge (53) of which two downward-facing, engaging in cup-like depressions (71) of the punch heads (7) and pressure pivots (52) are arranged with their tips pivotably supporting against the bottom thereof. 2. Brieflocher nach Anspruch 1, dadurch gekennzeich­net, daß die Lochstempel (4) im Bereich ihres Kopfes (7) in einer Axialführung (21) des Unter­teils (1, 2) geführt sind.2. letter punch according to claim 1, characterized in that the punch (4) in the region of their head (7) in an axial guide (21) of the lower part (1, 2) are guided. 3. Brieflocher nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Lochstempelköpfe (7) am Lochstempel (4) angeschlagen sind und eine der Schraubenfeder (6) als Widerlager dienende Ring­schulter aufweisen.3. letter punch according to claim 1 or 2, characterized in that the punch heads (7) on the punch (4) are attached and have a coil spring (6) serving as an abutment ring shoulder. 4. Brieflocher nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Unterseite der Druckplatte (3) mindestens eine der Oberkante der Druckschiene (5) als Anlage dienende Erhebung (31) aufweist.4. letter punch according to one of claims 1 to 3, characterized in that the underside of the pressure plate (3) has at least one of the upper edge of the pressure rail (5) serving as an elevation (31). 5. Brieflocher nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Druckschiene (5) mit ihrer Oberkante in eine Rinne (33) der Druck­platte (3) eingreift.5. letter punch according to one of claims 1 to 4, characterized in that the pressure rail (5) engages with its upper edge in a groove (33) of the pressure plate (3). 6. Brieflocher nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Druckschiene (5) im Bereich ihrer Oberkante an Seitenwangen (36) der Druckplatte (3) mit Spiel angelenkt ist.6. letter punch according to one of claims 1 to 5, characterized in that the pressure rail (5) in the region of its upper edge on side cheeks (36) of the pressure plate (3) is articulated with play. 7. Brieflocher nach Anspruch 6, dadurch gekennzeich­net, daß die Druckschiene (5) im Bereich ihrer Oberkante stirnseitig überstehende, in Aussparun­gen (35) in den Seitenwangen (36) der Druckplatte (3) mit Spiel eingreifende Zapfen (51) aufweist.7. letter punch according to claim 6, characterized in that the pressure rail (5) in the region of its upper edge projecting on the end face, in recesses (35) in the side cheeks (36) of the pressure plate (3) with play engaging pin (51). 8. Brieflocher nach Anspruch 7, dadurch gekennzeich­net, daß die Zapfen (51) mit ihrer Unterkante gegen den unteren Rand der Aussparungen (35) anliegen.8. letter punch according to claim 7, characterized in that the pins (51) rest with their lower edge against the lower edge of the recesses (35). 9. Brieflocher nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß der Angriffspunkt der Druckübertragung der Druckzapfen (52) auf dem Boden der Aussparungen (71) der Lochstempelköpfe (7) unterhalb der oberen Kante der Axialführung (21) liegt.9. letter punch according to one of claims 1 to 8, characterized in that the point of application of the pressure transmission of the pressure pin (52) on the The bottom of the recesses (71) of the punch heads (7) lies below the upper edge of the axial guide (21).
EP88100745A 1987-02-14 1988-01-20 Paper punch Expired - Lifetime EP0279193B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88100745T ATE75990T1 (en) 1987-02-14 1988-01-20 MAILHOLE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3704670 1987-02-14
DE19873704670 DE3704670A1 (en) 1987-02-14 1987-02-14 LETTER HOLE

Publications (3)

Publication Number Publication Date
EP0279193A2 true EP0279193A2 (en) 1988-08-24
EP0279193A3 EP0279193A3 (en) 1990-12-05
EP0279193B1 EP0279193B1 (en) 1992-05-13

Family

ID=6320985

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88100745A Expired - Lifetime EP0279193B1 (en) 1987-02-14 1988-01-20 Paper punch

Country Status (5)

Country Link
EP (1) EP0279193B1 (en)
JP (1) JPH0615160B2 (en)
AT (1) ATE75990T1 (en)
DE (2) DE3704670A1 (en)
ES (1) ES2031536T3 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0487544B1 (en) * 1989-08-14 1994-03-02 Louis Leitz KG Paper punch
GB2384738A (en) * 2002-01-31 2003-08-06 Acco Uk Ltd Improvements in or relating to hole punches

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021166419A1 (en) * 2020-02-20 2021-08-26 日立Astemo株式会社 Thermal flow meter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2275012A (en) * 1940-01-30 1942-03-03 Bates Mfg Co Perforator
US2433110A (en) * 1945-12-22 1947-12-23 Gardner Hyman Single hand operated card punch
GB1444366A (en) * 1973-01-24 1976-07-28 Hyde A Heginbotham W J Cutting tools for paper-punch devices and paper-punch devices incorporating such cutting tools
US4294152A (en) * 1979-05-16 1981-10-13 Land Donald E Film punch

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR517027A (en) * 1920-06-11 1921-04-29 Lennox Liddell Improvements to devices used to perforate paper

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2275012A (en) * 1940-01-30 1942-03-03 Bates Mfg Co Perforator
US2433110A (en) * 1945-12-22 1947-12-23 Gardner Hyman Single hand operated card punch
GB1444366A (en) * 1973-01-24 1976-07-28 Hyde A Heginbotham W J Cutting tools for paper-punch devices and paper-punch devices incorporating such cutting tools
US4294152A (en) * 1979-05-16 1981-10-13 Land Donald E Film punch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0487544B1 (en) * 1989-08-14 1994-03-02 Louis Leitz KG Paper punch
GB2384738A (en) * 2002-01-31 2003-08-06 Acco Uk Ltd Improvements in or relating to hole punches
GB2384738B (en) * 2002-01-31 2005-02-23 Acco Uk Ltd Improvements in or relating to hole punches

Also Published As

Publication number Publication date
JPH0615160B2 (en) 1994-03-02
EP0279193B1 (en) 1992-05-13
JPS63251198A (en) 1988-10-18
ES2031536T3 (en) 1992-12-16
EP0279193A3 (en) 1990-12-05
DE3870905D1 (en) 1992-06-17
ATE75990T1 (en) 1992-05-15
DE3704670A1 (en) 1988-08-25

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