EP0280858A2 - Paper punch - Google Patents

Paper punch Download PDF

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Publication number
EP0280858A2
EP0280858A2 EP88100746A EP88100746A EP0280858A2 EP 0280858 A2 EP0280858 A2 EP 0280858A2 EP 88100746 A EP88100746 A EP 88100746A EP 88100746 A EP88100746 A EP 88100746A EP 0280858 A2 EP0280858 A2 EP 0280858A2
Authority
EP
European Patent Office
Prior art keywords
pressure
pressure lever
lever
pressure body
spring
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
EP88100746A
Other languages
German (de)
French (fr)
Other versions
EP0280858B1 (en
EP0280858A3 (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 AT88100746T priority Critical patent/ATE74307T1/en
Publication of EP0280858A2 publication Critical patent/EP0280858A2/en
Publication of EP0280858A3 publication Critical patent/EP0280858A3/en
Application granted granted Critical
Publication of EP0280858B1 publication Critical patent/EP0280858B1/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
    • B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
    • B26F1/04—Perforating by punching, e.g. with relatively-reciprocating punch and bed with selectively-operable punches
    • 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 letter punch with a lower part and a pivotally mounted on pedestals of the lower part, guided on two guides in the lower part against the restoring force of a spring by means of a pressure element acting pressure lever.
  • the invention has for its object to provide a punch hole punch of the type specified, which allows simple reduction, preferably a halving of the pressure force during the punching process with simple means.
  • the invention is based on the idea that in the case of double or multiple perforations, a lower compressive force is required if the holes are introduced one after the other and not simultaneously. Proceeding from this proposed according to the invention that at least one of the pressure body on the pressure lever against the restoring force of a spring can be moved from an effective to an ineffective position, can be locked in the inactive position when the pressure lever is depressed and can be automatically pushed back into its effective position when the pressure lever is raised.
  • the displaceable pressure body is arranged in a recess of the pressure lever, which is preferably designed as a pressure plate, in such a way that it protrudes from the recess in its effective position and is pushed into the inactive position.
  • the pressure body according to the invention advantageously has a latching surface which, in the inactive position of the pressure body when the pressure plate is depressed, under the action of the spring against one arranged on the lower part Counter detent is present and can be released automatically when the pressure lever is lifted.
  • the displaceable pressure body has an attachment which has a limit stop which bears against the pressure plate in the effective position of the pressure body and whose end face lying opposite the limit stop bears against the end face of the punch.
  • the recess receiving the displaceable pressure body is advantageously oriented obliquely to the top of the pressure plate.
  • the pressure body expediently has a helical spring which is supported against the pressure plate in a recess at the end opposite the end protruding from the pressure plate.
  • the letter punch essentially consists of a lower part 1 and a pressure lever 2 articulated on bearing blocks 10 of the lower part 1.
  • the punches 3 enclosed by a helical spring 4 are guided in the bearing blocks.
  • a pressure body formed on the underside of the pressure plate 2 acts in a known manner.
  • the pressure body 5 acts, which is guided in a recess that runs obliquely to the surface of the pressure lever 2, is cylindrical or is delimited by tabs 21, 21 ⁇ and against the restoring force of a coil spring 8 from the one in FIG. 1 drawn position, that is, when the punch hole is not actuated or before the punch hole is pressed, can be pressed into the recess.
  • the pressure body 5 has a shoulder 6, which extends obliquely to its longitudinal extent, with a shoulder 7.
  • the shoulder 7 rests against the underside of the pressure lever 2 and thus forms both a limit stop for the longitudinal movement of the pressure body 5 and also an abutment for the shoulder 6 when the end face of the shoulder 6 opposite the shoulder 7 opens when the punch hole is actuated the punch 4 acts (see. Fig. 2).

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Paper (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

The paper punch according to the invention has a device which enables the pressure lever (2) to act only on one of the pressure punches (4). For this purpose a pressure member (5) is arranged in a cutout of the pressure lever (2) so as to be displaceable counter to the restoring force of a spring (8). The pressure member (5) has a lug (6) which, in the position of rest of the pressure member (5), bears with one shoulder (7) against the underside of the pressure lever and with the end face lying opposite this shoulder (7) acts on the hole punch (4). On actuation of only one hole punch (4), the pressure member (5) is displaced, shortly before pivoting into its inactive position, and firmly held there until, on raising the pressure lever (2), it passes into its active position again under the action of the spring (8). <IMAGE>

Description

Die Erfindung betrifft einen Brieflocher mit einem Unter­teil und einem an Lagerböcken des Unterteils schwenkbar gelagerten, auf zwei in Führungen des Unterteils geführte Lochstempel gegen die Rückstellkraft einer Feder mittels je eines Druckkörpers einwirkenden Druckhebel.The invention relates to a letter punch with a lower part and a pivotally mounted on pedestals of the lower part, guided on two guides in the lower part against the restoring force of a spring by means of a pressure element acting pressure lever.

Um hartes Material oder einen Stapel von Briefbögen gleichzeitig ohne eine übermäßige Beanspruchung des Brieflochers lochen zu können, ist es bekannt, zwei getrennte Druckhebel zu verwenden, die einzeln oder gemeinsam betätigt werden können.In order to be able to punch hard material or a stack of letterheads simultaneously without undue stress on the letter punch, it is known to use two separate pressure levers which can be operated individually or together.

Weiter ist es bei einem verstellbaren Brieflocher an sich bekannt (DE-PS 420 124), das auf die Lochstempel einwirkende Druckorgan nur mit einem Lochstempel in ständige Berührung zu setzen. Dort sind in verschiedenen Abständen vom ersten Lochstempel zwei weitere Loch­stempel angeordnet, die durch ein umstellbares Glied wahlweise mit dem Druckorgan in Wirkverbindung gebracht werden können. Eine Verringerung der Druckkraft beim Lochvorgang ist dort weder beabsichtigt noch möglich.Furthermore, in the case of an adjustable letter punch, it is known per se (DE-PS 420 124) that the pressure element acting on the punch is only in constant contact with a punch. There are two further punches arranged at different distances from the first punch, which can be brought into operative connection with the pressure element either by means of an adjustable link. A reduction in the pressure force during the punching process is neither intended nor possible there.

Der Erfindung liegt die Aufgabe zugrunde, einen Brief­locher der eingangs angegebenen Art zu schaffen, der mit einfachen Mitteln wahlweise eine Verringerung, vorzugs­weise eine Halbierung der Druckkraft beim Lochvorgang ermöglicht.The invention has for its object to provide a punch hole punch of the type specified, which allows simple reduction, preferably a halving of the pressure force during the punching process with simple means.

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

Die Erfindung geht von dem Gedanken aus, daß bei einer Zwei- oder Mehrfachlochung eine geringere Druckkraft erforderlich ist, wenn die Löcher nacheinander und nicht gleichzeitig eingebracht werden. Ausgehend hiervon wird gemäß der Erfindung vorgeschlagen, daß mindestens einer der Druckkörper am Druckhebel gegen die Rückstellkraft einer Feder von einer wirksamen in eine unwirksame Stellung verschiebbar, beim Niederdrücken des Druckhebels in der unwirksamen Stellung arretierbar und beim Anheben des Druckhebels selbsttätig in seine wirksame Stellung zurückverschiebbar ist.The invention is based on the idea that in the case of double or multiple perforations, a lower compressive force is required if the holes are introduced one after the other and not simultaneously. Proceeding from this proposed according to the invention that at least one of the pressure body on the pressure lever against the restoring force of a spring can be moved from an effective to an ineffective position, can be locked in the inactive position when the pressure lever is depressed and can be automatically pushed back into its effective position when the pressure lever is raised.

Für den Fall, daß einem Benutzer die Lochung eines Papierstapels in einem Arbeitsgang zu schwer fällt, kann er zunächst einen der Lochstempel durch Verschieben des zugehörigen Druckkörpers entgegen der Kraft der Feder in seine unwirksame Stellung verschieben. Wenn nun ein Hub beendet ist, gelangt der Druckkörper unter der Einwirkung der Feder automatischen wieder in seine Wirkstellung, so daß ohne Unterbrechung ein zweiter Hub unter Ausführung der zweiten Lochung durchgeführt werden kann. Durch die Führung des benachbarten Lochstempels in der ersten Lochung wird erreicht, daß der vorgeschriebene Lochab­stand eingehalten wird.In the event that it is too difficult for a user to perforate a stack of paper in one operation, he can first move one of the punches into its inactive position by moving the associated pressure element against the force of the spring. When a stroke is now completed, the pressure body automatically returns to its operative position under the action of the spring, so that a second stroke can be carried out without interruption by executing the second perforation. By guiding the neighboring punch in the first perforation it is achieved that the prescribed hole spacing is maintained.

Gemäß einer vorteilhaften Ausgestaltung der Erfindung ist der verschiebbare Druckkörper in einer Aussparung des vorzugsweise als Druckplatte ausgebildeten Druck­hebels so angeordnet, daß er in seiner wirksamen Stellung aus der Aussparung herausragt und in der unwirksamen Stellung in diese eingeschoben ist.According to an advantageous embodiment of the invention, the displaceable pressure body is arranged in a recess of the pressure lever, which is preferably designed as a pressure plate, in such a way that it protrudes from the recess in its effective position and is pushed into the inactive position.

Der erfindungsgemäße Druckkörper weist vorteilhafterweise eine Rastfläche auf, die in der unwirksamen Stellung des Druckkörpers bei niedergedrückter Druckplatte unter der Einwirkung der Feder gegen eine am Unterteil angeordnete Gegenrast anliegt und beim Anheben des Druckhebels von dieser selbsttätig lösbar ist.The pressure body according to the invention advantageously has a latching surface which, in the inactive position of the pressure body when the pressure plate is depressed, under the action of the spring against one arranged on the lower part Counter detent is present and can be released automatically when the pressure lever is lifted.

Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung weist der verschiebbare Druckkörper einen Ansatz auf, der einen in der wirksamen Stellung des Druckkörpers gegen die Druckplatte anliegenden Begren­zungsanschlag aufweist und dessen dem Begrenzungsanschlag gegenüberliegende Stirnfläche gegen die Stirnfläche des Lochstempels anliegt. Die den verschiebbaren Druckkörper aufnehmende Aussparung ist dabei vorteilhafterweise schräg zur Oberseite der Druckplatte ausgerichtet. Zweck­mäßig weist der Druckkörper an dem dem aus der Druck­platte herausragenden Ende gegenüberliegenden Ende in einer Aussparung eine gegen die Druckplatte sich abstüt­zende Schraubenfeder auf.According to a further advantageous embodiment of the invention, the displaceable pressure body has an attachment which has a limit stop which bears against the pressure plate in the effective position of the pressure body and whose end face lying opposite the limit stop bears against the end face of the punch. The recess receiving the displaceable pressure body is advantageously oriented obliquely to the top of the pressure plate. The pressure body expediently has a helical spring which is supported against the pressure plate in a recess at the end opposite the end protruding from the pressure plate.

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

  • Fig. 1 einen senkrechten Schnitt durch einen Brief­locher mit angehobenem Druckhebel;
  • Fig. 2 eine Darstellung entsprechend Fig. 1 bei betätigtem Druckhebel mit Druckkörper in seiner wirksamen Stellung;
  • Fig. 3 eine Darstellung entsprechend Fig. 1 und 2 bei betätigtem Druckhebel mit Druckkörper in seiner unwirksamen Stellung.
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 section through a letter punch with the pressure lever raised;
  • FIG. 2 shows a representation corresponding to FIG. 1 when the pressure lever is actuated with the pressure body in its active position;
  • Fig. 3 is a representation corresponding to FIGS. 1 and 2 with the pressure lever operated with the pressure body in its inactive position.

Der Brieflocher besteht im wesentlichen aus einem Unter­teil 1 und einem an Lagerböcken 10 des Unterteils 1 angelenkten Druckhebel 2. In den Lagerböcken sind die von einer Schraubenfeder 4 umschlossenen Lochstempel 3 geführt. Auf den einen, in der Zeichnung nicht darge­stellten Lochstempel wirkt in bekannter Weise ein an der Unterseite der Druckplatte 2 angeformter Druckkörper. Auf den anderen, in der Zeichnung dargestellten Loch­stempel 3 wirkt der Druckkörper 5, der in einer schräg zur Oberfläche des Druckhebels 2 verlaufenden, zylindri­schen oder durch Laschen 21, 21ʹ begrenzten Aussparung geführt ist und gegen die Rückstellkraft einer Schrauben­feder 8 aus der in Fig. 1 gezeichneten Stellung, also bei unbetätigtem Brieflocher bzw. vor Betätigung des Brieflochers, in die Aussparung hineingedrückt werden kann. Der Druckkörper 5 weist einen schräg zu seiner Längserstreckung sich erstreckenden Ansatz 6 mit einer Schulter 7 auf. Bei unbetätigtem Brieflocher liegt die Schulter 7 gegen die Unterseite des Druckhebels 2 an und bildet so sowohl einen Begrenzungsanschlag für die Längs­bewegung des Druckkörpers 5 als auch ein Widerlager für den Ansatz 6, wenn die der Schulter 7 gegenüberliegende Stirnfläche des Ansatzes 6 bei Betätigung des Brief­lochers auf den Lochstempel 4 einwirkt (vergl. Fig. 2).The letter punch essentially consists of a lower part 1 and a pressure lever 2 articulated on bearing blocks 10 of the lower part 1. The punches 3 enclosed by a helical spring 4 are guided in the bearing blocks. On the one punch, not shown in the drawing, a pressure body formed on the underside of the pressure plate 2 acts in a known manner. On the other punch 3 shown in the drawing, the pressure body 5 acts, which is guided in a recess that runs obliquely to the surface of the pressure lever 2, is cylindrical or is delimited by tabs 21, 21ʹ and against the restoring force of a coil spring 8 from the one in FIG. 1 drawn position, that is, when the punch hole is not actuated or before the punch hole is pressed, can be pressed into the recess. The pressure body 5 has a shoulder 6, which extends obliquely to its longitudinal extent, with a shoulder 7. When the punch hole is not actuated, the shoulder 7 rests against the underside of the pressure lever 2 and thus forms both a limit stop for the longitudinal movement of the pressure body 5 and also an abutment for the shoulder 6 when the end face of the shoulder 6 opposite the shoulder 7 opens when the punch hole is actuated the punch 4 acts (see. Fig. 2).

Wird nun vor Betätigung des Druckhebels 2 der Druckkörper 5 unter Überwindung der Rückstellkraft der Schraubenfeder 8 in die in Fig. 3 gezeigte Stellung verschoben, so gleitet der Ansatz 6 mit seiner Rastfläche 61 an der Gegenrast 11 des Lagerbocks 10 entlang und wird in dieser Stellung festgehalten, bis der Druckhebel 2 wieder nach oben zurückgeschwenkt wird und der Druckkörper 5 unter der Einwirkung der an einem Widerlager der Druckplatte 2 sich abstützenden Schraubenfeder in seine Wirkstellung gelangt.If the pressure body 5 is now moved into the position shown in FIG. 3 before actuating the pressure lever 2 while overcoming the restoring force of the helical spring 8, the shoulder 6 slides with its latching surface 61 along the counter latch 11 of the bearing block 10 and is held in this position until the pressure lever 2 is pivoted back up and the pressure body 5 under the action of the helical spring supported on an abutment of the pressure plate 2 reaches its operative position.

Claims (7)

1. Brieflocher mit einem Unterteil (1) und einem an Lagerböcken (10) des Unterteils (1) schwenkbar gelagerten, auf zwei am Unterteil (1) verschiebbar geführte Lochstempel (3) gegen die Rückstellkraft einer Feder (4) mittels je eines Druckkörpers (5) einwirkenden Druckhebel (2), dadurch gekennzeich­net, daß mindestens einer der Druckkörper (5) am Druckhebel (2) gegen die Rückstellkraft einer Feder (8) von einer wirksamen in eine unwirksame Stellung verschiebbar, beim Niederdrücken des Druckhebels (2) in der unwirksamen Stellung arretierbar und beim Anheben des Druckhebels (2) selbsttätig in seine wirksame Stellung zurück­verschiebbar ist.1. letter punch with a lower part (1) and a punch (3) pivotably mounted on bearing blocks (10) of the lower part (1) and guided on two on the lower part (1) against the restoring force of a spring (4) by means of a pressure element ( 5) acting pressure lever (2), characterized in that at least one of the pressure body (5) on the pressure lever (2) against the restoring force of a spring (8) from an effective to an inactive position, when pushing the pressure lever (2) in the ineffective position can be locked and automatically pushed back into its effective position when the pressure lever (2) is raised. 2. Brieflocher nach Anspruch 1, dadurch gekennzeich­net, daß der verschiebbare Druckkörper (5) in einer Aussparung des Druckhebels (2) so angeordnet ist, daß er in seiner wirksamen Stellung aus der Aussparung herausragt und in der unwirksamen Stellung in diese eingeschoben ist.2. letter punch according to claim 1, characterized in that the displaceable pressure body (5) in a recess of the pressure lever (2) is arranged so that it protrudes from the recess in its effective position and is inserted into the ineffective position in this. 3. Brieflocher nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Druckkörper (5) eine Rastfläche (51) aufweist, die in der unwirksamen Stellung des Druckkörpers (5) bei niedergedrücktem Druckhebel (2) unter der Einwirkung der Feder gegen eine am Unterteil (1) angeordnete Gegenrast (11) anliegt und beim Anheben des Druckhebels (2) von dieser selbsttätig lösbar ist.3. letter punch according to claim 1 or 2, characterized in that the pressure body (5) Has locking surface (51), which in the inactive position of the pressure body (5) when the pressure lever (2) is depressed under the action of the spring against a counter-catch (11) arranged on the lower part (1) and when the pressure lever (2) is lifted by the latter is automatically solvable. 4. Brieflocher nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Druckkörper (5) einen Ansatz (6) aufweist, der einen in der wirk­samen Stellung des Druckkörpers (5) gegen den Druckhebel (2) anliegenden Begrenzungsanschlag (7) aufweist und dessen dem Begrenzungsanschlag (7) gegenüberliegende Stirnfläche gegen die Stirn­fläche des Lochstempels (3) anliegt.4. letter punch according to one of claims 1 to 3, characterized in that the pressure body (5) has a projection (6) having a in the effective position of the pressure body (5) against the pressure lever (2) adjacent limit stop (7) and whose end face lying opposite the limit stop (7) bears against the end face of the punch (3). 5. Brieflocher nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die den Druckkörper (5) aufnehmende Aussparung schräg zur Oberseite des Druckhebels verläuft.5. letter punch according to one of claims 1 to 4, characterized in that the pressure body (5) receiving recess extends obliquely to the top of the pressure lever. 6. Brieflocher nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Druckkörper (5) an seinem dem über den Druckhebel (2) überstehen­den Ende gegenüberliegenden Ende eine in einer Aussparung angeordnete, gegen die Druckplatte (2) sich abstützende Schraubenfeder (8) aufweist.6. letter punch according to one of claims 1 to 5, characterized in that the pressure body (5) at its end opposite the end of the pressure lever (2) protruding from a arranged in a recess, against the pressure plate (2) supporting coil spring (8 ) having. 7. Brieflocher nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Druckkörper (5) einen zylindrischen Schaft aufweist.7. letter punch according to one of claims 1 to 6, characterized in that the pressure body (5) has a cylindrical shaft.
EP88100746A 1987-03-02 1988-01-20 Paper punch Expired - Lifetime EP0280858B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88100746T ATE74307T1 (en) 1987-03-02 1988-01-20 MAILHOLE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3706695 1987-03-02
DE19873706695 DE3706695A1 (en) 1987-03-02 1987-03-02 LETTER HOLE

Publications (3)

Publication Number Publication Date
EP0280858A2 true EP0280858A2 (en) 1988-09-07
EP0280858A3 EP0280858A3 (en) 1990-12-05
EP0280858B1 EP0280858B1 (en) 1992-04-01

Family

ID=6322115

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88100746A Expired - Lifetime EP0280858B1 (en) 1987-03-02 1988-01-20 Paper punch

Country Status (5)

Country Link
EP (1) EP0280858B1 (en)
JP (1) JPS63229299A (en)
AT (1) ATE74307T1 (en)
DE (2) DE3706695A1 (en)
ES (1) ES2030770T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006027009B4 (en) * 2006-06-08 2011-09-15 Esselte Leitz Gmbh & Co. Kg paper punch
JP5875490B2 (en) * 2012-09-07 2016-03-02 典政 佐々木 2-hole punch

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1655315A (en) * 1927-06-24 1928-01-03 Boorum & Pease Company Punch
GB740305A (en) * 1953-09-23 1955-11-09 Acco Products Inc Perforating devices

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE420124C (en) * 1922-09-30 1925-10-16 Henri Waldschmidt Adjustable punch, in which the pressure element acting on the punch is only in constant contact with a punch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1655315A (en) * 1927-06-24 1928-01-03 Boorum & Pease Company Punch
GB740305A (en) * 1953-09-23 1955-11-09 Acco Products Inc Perforating devices

Also Published As

Publication number Publication date
DE3869643D1 (en) 1992-05-07
EP0280858B1 (en) 1992-04-01
DE3706695A1 (en) 1988-09-15
JPS63229299A (en) 1988-09-26
EP0280858A3 (en) 1990-12-05
ES2030770T3 (en) 1992-11-16
ATE74307T1 (en) 1992-04-15

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