EP0910511B1 - Letter opener - Google Patents

Letter opener Download PDF

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Publication number
EP0910511B1
EP0910511B1 EP98902923A EP98902923A EP0910511B1 EP 0910511 B1 EP0910511 B1 EP 0910511B1 EP 98902923 A EP98902923 A EP 98902923A EP 98902923 A EP98902923 A EP 98902923A EP 0910511 B1 EP0910511 B1 EP 0910511B1
Authority
EP
European Patent Office
Prior art keywords
knife
letter
rail
opener according
letter opener
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.)
Expired - Lifetime
Application number
EP98902923A
Other languages
German (de)
French (fr)
Other versions
EP0910511A1 (en
Inventor
Werner Haug
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.)
Frama AG
Original Assignee
Frama AG
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 Frama AG filed Critical Frama AG
Publication of EP0910511A1 publication Critical patent/EP0910511A1/en
Application granted granted Critical
Publication of EP0910511B1 publication Critical patent/EP0910511B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43MBUREAU ACCESSORIES NOT OTHERWISE PROVIDED FOR
    • B43M7/00Devices for opening envelopes
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S83/00Cutting
    • Y10S83/912Envelope openers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/768Rotatable disc tool pair or tool and carrier
    • Y10T83/7755Carrier for rotatable tool movable during cutting
    • Y10T83/7763Tool carrier reciprocable rectilinearly
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/869Means to drive or to guide tool
    • Y10T83/8776Constantly urged tool or tool support [e.g., spring biased]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/869Means to drive or to guide tool
    • Y10T83/8821With simple rectilinear reciprocating motion only
    • Y10T83/8822Edge-to-edge of sheet or web [e.g., traveling cutter]

Definitions

  • the present invention relates to a letter opener according to the preamble of claim 1.
  • a wide variety of letter openers are known from the literature, who open an envelope to create a waste strip.
  • Such openers generate waste that has to be disposed of is.
  • the contents of the letter can also be cut be cut up.
  • the opening process is also said to be without that in many known letter openers mostly tedious alignment of the letter to the cutting edge or the tricky insertion of the letter edge into an insertion slot can be started.
  • An object of the invention is also operate the letter opener by hand only can.
  • this preload can be constructively simple and safe working way e.g. by means of spring-loaded Pressure rollers, which act on a shoulder on the circular knife, will be realized. That e.g. with a handle Knife housing can be used without any significant effort move along the rails, the letter to be opened just on the lower rail, which e.g. at the same time as a stop serves, can be freely created from above.
  • the knife carriage can e.g.
  • the letter opener essentially consists of a stationary one Part with the letter support surface 1 and a movable Knife housing (handle) 2.
  • An inclined surface 1 of the opener serves as a support for a letter. This is opened in the simplest way by hand the face 1 placed and slightly down in the direction of arrow A. pressed until its longitudinal edge abuts the stop 4. This stop 4 simultaneously forms a guide rail, on which the round knife 3 with its molded Shoulder 4A can roll along the letter. The guide rail 4 protrudes into the area of the shoulder of the knife molded groove and thus ensures a lateral guidance of the Knife.
  • a second, also connected to the stationary part Guide rail 40 is located opposite surface 1 raised area.
  • the roll on this second rail 40 two pressure rollers 5 from. These two roles 5 are about theirs extended axes of rotation connected with springs 7 on train.
  • the Axes of the rollers 5 are also one in the slots Knife axis receiving component 8 out.
  • the rollers 5 through the upper guide rail 40 on the periphery of the shoulder 4A against the spring action pushed apart, i.e. the two roles are under Preload by the spring 7. In this way Manufacturing tolerances especially in the distance between the two rails 4 and 40 compensated.
  • the lower rail securely into the groove on the shoulder of the Knife pushed in.
  • the cutting edge of the knife is 1-10 Is a hundredth of a millimeter from the contact surface 1, only cuts the knife 3 drawn over the envelope the top paper layer of the envelope. Since the Rail 4 rests on the groove base, the knife can never touch the letter pad.
  • the Knife edge in front of any hard objects in the envelope can have a second one on the side of the knife facing the envelope Shoulder with a slightly smaller diameter than the cutting edge be molded on. Protruding letter content elements (e.g. Paper clips) so raise the other shoulder and with it the Knife edge. Because the knife is in its pre-tensioned Spring back towards the upper rail, In this way, the cutting edge becomes a non-negligible one Part spared.
  • the knife housing move along the rails using handle 2.
  • the handle 2 is hook-shaped Bracket 9 connected to the component 8.
  • FIG. 2 shows, only two elements are visible from the outside: the letter edition and the movable knife housing.

Landscapes

  • Knives (AREA)
  • Devices For Opening Bottles Or Cans (AREA)

Description

Die vorliegende Erfindung betrifft einen Brieföffner gemäss dem Oberbegriff des Patentanspruchs 1.The present invention relates to a letter opener according to the preamble of claim 1.

Aus der Literatur sind verschiedenste Brieföffner bekannt, die ein Couvert unter Erzeugung eines Abfallstreifens öffnen. Hier sei diesbezüglich nur beispielshaft auf die Vorrichtung .zum Oeffnen von Briefumschlägen in der CH 660 571 hingewiesen. Bei derartigen Oeffnern entsteht Abfall, der zu entsorgen ist. Zudem kann beim Aufschneiden auch der Briefinhalt zerschnitten werden.A wide variety of letter openers are known from the literature, who open an envelope to create a waste strip. Here, in this regard, is only an example of the device . to open envelopes in CH 660 571. Such openers generate waste that has to be disposed of is. In addition, the contents of the letter can also be cut be cut up.

Weiter sind Geräte bekannt, die abfalllos ein Couvert öffnen. Bei den in den Publikationen US 4 419 915 und EP 0 703 097 beschriebenen Geräten wird das Couvert an einem gehäusefest angeordneten Messer mittels Transporteinrichtungen (Riemen und dergleichen Fördermittel) vorbeitransportiert. Derartige Geräteausbildungen sind aufwendig und teuer. Zudem besteht oft Gefahr, dass bedingt durch das Schneidmoment und die an einer anderen Stelle des Briefs angreifenden Transport-bzw. Bremskräfte der Brief während des Schneidens gedreht oder aufgerichtet wird. Devices are also known which open a envelope without waste. In the case of the publications US 4,419,915 and EP 0 703 097 described devices, the envelope is attached to a housing arranged knives by means of transport devices (belts and the like funding). Such Apprenticeships are complex and expensive. There is also often danger due to the cutting moment and the another point of the letter attacking transport or. Braking forces the letter rotated during cutting or is erected.

Es ist daher die Aufgabe der Erfindung, einen konstruktiv einfachen, kostengünstig herzustellenden Brieföffner vorzuschlagen, bei dem einerseits kein Abfall produziert wird und andererseits keine Probleme bei der Relativbewegung zwischen dem Brief und dem Messer entstehen. Der Oeffnungsvorgang soll zudem auch ohne das bei vielen bekannten Brieföffnern meist mühsame Ausrichten des Briefes zur Schneide oder das knifflige Einführen der Briefkante in einen Einführschlitz gestartet werden können. Ein Ziel der Erfindung ist ebenfalls den Brieföffner bloss mit Handantrieb betätigen zu können.It is therefore the object of the invention to be constructive propose simple, inexpensive letter openers, where on the one hand no waste is produced and on the other hand no problems with the relative movement arise between the letter and the knife. The opening process is also said to be without that in many known letter openers mostly tedious alignment of the letter to the cutting edge or the tricky insertion of the letter edge into an insertion slot can be started. An object of the invention is also operate the letter opener by hand only can.

Gelöst wird diese Aufgabe durch die Merkmale der Patentansprüche.This object is achieved by the features of the claims.

Dank der Vorspannung zwischen Messer und Schiene werden Fertigungstoleranzen beim Messer und dem Messergehäuse sowie den Führungsschienen und den Andruckrollen ausgeglichen. Das Messer wirkt dabei stets mit im wesentlichen gleicher Kraft auf den Brief ein. Wie in den abhängigen Patentansprüchen gezeigt, kann diese Vorspannkraft auf konstruktiv einfache und sicher arbeitende Weise z.B. mittels federbelasteten Andruckrollen, die auf eine Schulter am Rundmesser einwirken, realisiert werden. Das z.B. mit einem Handgriff versehene Messergehäuse lässt sich ohne nennenswerten Kraftauswand längs den Schienen verfahren, wobei der zu öffnende Brief bloss an die untere Schiene, die z.B. gleichzeitig als Anschlag dient, von oben her frei anlegbar ist. Selbstverständlich kann der Messerschlitten z.B. mittels einer zusätzlichen Zahnstange oder eines Transportzahnriemens über einen mitbewegten oder stationären Motor angetrieben werden (keine nähere Umschreibung hierzu, da u.E. jedem Fachmann derartige Lösungen bekannt sind). Zusammengefasst zeichnet sich ein erfindungsgemäss aufgebauter Brieföffner durch wenig Bauteile, eine kostengünstige kompakte Konstruktion und dank fast reibungsfreier Abrollbewegung geringer Antriebs-bzw, Vorschubkraft aus. Diese Konstruktion erlaubt zudem eine attraktive, zweckmässige Formgebung, so dass sich der Brieföffner auch gut als Geschenk oder Werbegeschenk eignet.Thanks to the pretension between the knife and the rail, manufacturing tolerances become for the knife and the knife housing as well as the Guide rails and the pressure rollers balanced. The Messer always acts with essentially the same force on the letter. As in the dependent claims shown, this preload can be constructively simple and safe working way e.g. by means of spring-loaded Pressure rollers, which act on a shoulder on the circular knife, will be realized. That e.g. with a handle Knife housing can be used without any significant effort move along the rails, the letter to be opened just on the lower rail, which e.g. at the same time as a stop serves, can be freely created from above. Of course, the knife carriage can e.g. by means of an additional rack or a toothed belt driven by a moving or stationary motor (no further description of this, because in our opinion everyone Such solutions are known to those skilled in the art). Summarized is characterized by a letter opener constructed according to the invention due to few components, an inexpensive, compact construction and thanks to the almost frictionless rolling motion Drive or feed force off. This construction allows also an attractive, practical design, so that the letter opener is also good as a gift or giveaway is suitable.

Im folgenden wird eine Ausführungsform des erfindungsgemässen Brieföffners anhand der beiliegenden Figuren näher beschrieben. Es zeigen:

  • Fig. 1 einen Querschnitt durch das Messergehäuse und den Briefsupport (mit einer Detailsicht der über die Federn vorgespannten Andruckrollen)
  • Fig. 2 eine skizzenhafte Gestaltung des Brieföffners in mehreren Ansichten
An embodiment of the letter opener according to the invention is described in more detail below with reference to the accompanying figures. Show it:
  • 1 shows a cross section through the knife housing and the letter support (with a detailed view of the pressure rollers pretensioned via the springs)
  • Fig. 2 shows a sketchy design of the letter opener in several views

Der Brieföffner besteht im wesentlichen aus einem ortsfesten Teil mit der Briefauflagefläche 1 und einem beweglichen Messergehäuse (Handgriff) 2.The letter opener essentially consists of a stationary one Part with the letter support surface 1 and a movable Knife housing (handle) 2.

Eine schräge Fläche 1 des Oeffners dient als Auflage für einen Brief. Dieser wird auf einfachste Weise von Hand auf die Fläche 1 gelegt und leicht in Pfeilrichtung A nach unten gedrückt, bis seine Längskante an dem Anschlag 4 anliegt. Dieser Anschlag 4 bildet gleichzeitig die eine Führungsschiene, auf der das runde Messer 3 mit seiner angeformten Schulter 4A längs des Briefes abrollen kann. Die Führungsschiene 4 ragt in die im Bereich der Schulter des Messers eingeformte Nut und gewährleistet so eine Seitenführung des Messers.An inclined surface 1 of the opener serves as a support for a letter. This is opened in the simplest way by hand the face 1 placed and slightly down in the direction of arrow A. pressed until its longitudinal edge abuts the stop 4. This stop 4 simultaneously forms a guide rail, on which the round knife 3 with its molded Shoulder 4A can roll along the letter. The guide rail 4 protrudes into the area of the shoulder of the knife molded groove and thus ensures a lateral guidance of the Knife.

Eine zweite, ebenfalls mit dem ortsfesten Teil verbundene Führungsschine 40 befindet sich im gegenüber der Fläche 1 erhöhten Bereich. Auf dieser zweiten Schiene 40 rollen die zwei Andruckrollen 5 ab. Diese beiden Rollen 5 sind über ihre verlängerten Drehachsen mit Federn 7 auf Zug verbunden. Die Achsen der Rollen 5 sind zudem in Schlitzen eines die Messerachse aufnehmenden Bauteils 8 geführt. Im montierten Zustand werden die Rollen 5 durch die obere Führungsschiene 40 auf der Peripherie der Schulter 4A gegen die Federwirkung auseinandergedrückt, d.h. die beiden Rollen stehen unter Vorspannung durch die Feder 7. Auf diese Weise werden Fertigungstoleranzen insbesondere beim Abstand zwischen den beiden Schienen 4 und 40 auskompensiert. Gleichzeitig wird die untere Schiene sicher in die Nut an der Schulter des Messers hineingedrückt. Da die Schneide des Messers um 1-10 Hunderstelmillimeter von der Auflagefläche 1 zurücksteht, schneidet das über den Briefumschlag gezogene Messer 3 nur die obenliegende Papierschicht des Couverts auf. Da die Schiene 4 dabei auf dem Nutgrund aufliegt, kann das Messer die Briefauflagefläche nie berühren. Zur Schonung der Messerschneide vor allfälligen harten Gegenständen im Couvert. kann an der dem Couvert zugewandten Messerseite eine zweite Schulter mit leicht kleinerem Durchmesser als die Schneide angeformt sein. Hervorstehende Briefinhaltselemente (z.B. Büroklammern) heben so die weitere Schulter und mit ihr die Messerschneide an. Da das Messer dabei in seiner vorgespannten Führung zur oberen Schiene hin zurückfedern kann, wird auf diese Weise die Schneide zu einem nicht vernachlässigbaren Teil geschont.A second, also connected to the stationary part Guide rail 40 is located opposite surface 1 raised area. The roll on this second rail 40 two pressure rollers 5 from. These two roles 5 are about theirs extended axes of rotation connected with springs 7 on train. The Axes of the rollers 5 are also one in the slots Knife axis receiving component 8 out. In the assembled Condition the rollers 5 through the upper guide rail 40 on the periphery of the shoulder 4A against the spring action pushed apart, i.e. the two roles are under Preload by the spring 7. In this way Manufacturing tolerances especially in the distance between the two rails 4 and 40 compensated. At the same time the lower rail securely into the groove on the shoulder of the Knife pushed in. Since the cutting edge of the knife is 1-10 Is a hundredth of a millimeter from the contact surface 1, only cuts the knife 3 drawn over the envelope the top paper layer of the envelope. Since the Rail 4 rests on the groove base, the knife can never touch the letter pad. To protect the Knife edge in front of any hard objects in the envelope. can have a second one on the side of the knife facing the envelope Shoulder with a slightly smaller diameter than the cutting edge be molded on. Protruding letter content elements (e.g. Paper clips) so raise the other shoulder and with it the Knife edge. Because the knife is in its pre-tensioned Spring back towards the upper rail, In this way, the cutting edge becomes a non-negligible one Part spared.

Während des eigentlichen Schneidvorgangs wird das Messergehäuse mit Hilfe des Handgriffes 2 längs den Schienen verfahren. Der Handgriff 2 ist dazu über einen hakenförmigen Bügel 9 mit dem Bauteil 8 verbunden. During the actual cutting process, the knife housing move along the rails using handle 2. For this purpose, the handle 2 is hook-shaped Bracket 9 connected to the component 8.

Wie die in der Fig. 2 dargestellten Gehäuseansichten zeigen, sind von Aussen bloss zwei Elemente ersichtlich: Die Briefauflage und das bewegliche Messergehäuse.As the housing views shown in FIG. 2 show, only two elements are visible from the outside: the letter edition and the movable knife housing.

Die Erfindung beschränkt sich nicht auf die beschriebene und in den Figuren dargestellte Ausführungsform. Vielmehr umfasst sie alle Brieföffner, bei denen die Lehre der Ansprüche verwirklicht ist. Selbstverständlich kann die geforderte Vorspannung zwischen Messer und Schienen auch durch andere Spannelemente erzeugt werden. Denkbar sind Bandfedern oder vorgespannte Gummielemente, die aber die gleiche Funktion wie die Zugfedern 7 ausüben. Es ist weiter auch möglich, die Vorspannung z.B. durch eine besondere Ausbildung des Messerträgerbauteils 8 selbst, d.h. unter Ausnutzung der Material-oder Formelastizität am Träger 8, zu generieren. An dieser Stelle sei an die grosse Vielfalt auf dem Gebiet der meist eine elastische Funktion erfüllenden Fixierelemente (Klammern o.dgl.) hingewiesen. Selbstverständlich können auch derartig aufgebaute Träger 8 sich mittels an ihnen angebrachten Rollen an den Schienen abstützen und so den Translationswiderstand des Messerträgers reduzieren. Anstelle von Rollen können aber auch reibungsarme starre Gleitelemente, z.B. aus Kunststoff vorgesehen werden.The invention is not limited to that described and embodiment shown in the figures. Rather includes they all letter openers where the teaching of claims is realized is. Of course, the required Preload between knife and rails also by others Clamping elements are generated. Band springs or are conceivable pre-stressed rubber elements, but the same function as exert the tension springs 7. It is also possible that Preload e.g. through a special design of the knife carrier component 8 itself, i.e. taking advantage of the material or Formula elasticity on the carrier 8 to generate. At this Place the great diversity in the field of mostly an elastic function-performing fixing elements (brackets or the like.) Of course, such can also be the case constructed carrier 8 itself by means of rollers attached to them support on the rails and thus the translation resistance reduce the knife holder. Instead of roles you can also low-friction rigid sliding elements, e.g. made of plastic be provided.

Vorbehalten bleibt eine nachträgliche Ergänzung der Ansprüche durch Teile der Beschreibung/Zeichnung. Insbesondere ist denkbar, anstelle des gezeigten Handbetriebs einen motorischen Vorschub für das Messergehäuse einzuplanen. Im weiteren fallen auch alle Geräte unter den Schutzuafang, die couvertähnliche Beutel oder Behältnisse auf die beschriebene Weise öffnen.Subsequent supplementation of the claims remains reserved by parts of the description / drawing. In particular is conceivable, instead of the manual operation shown, a motor Plan feed for the knife housing. In the further All devices also fall under the protection category, the envelope-like one Bags or containers in the manner described to open.

Claims (10)

  1. Letter opener which operates without producing any waste, comprising a circular knife (3), characterised in that the knife (3) is arranged in a knife housing which can be moved along a rail (4) by hand or driven by a motor, a pretensioning force being present between the knife (3) and the rail (4) or means being provided to produce this pretensioning force.
  2. Letter opener according to claim 1, characterised in that the knife (3) has a circular shoulder arranged concentrically with the cutting edge and having a smaller diameter than the cutting edge.
  3. Letter opener according to one of claims 1 to 2, characterised in that a pressure roller (5) arranged to move relative to the knife housing exerts a pretensioning force between the knife (3) and the rail (4).
  4. Letter opener according to one of claims 1 to 3, characterised in that the pretensioning force is produced by means of a helical spring acting as a tension spring (7).
  5. Letter opener according to one of claims 1 to 4, characterised in that two pressure rollers (5), the axes of which are guided in slots and are drawn apart by means of two tension springs (7), act on the shoulder of the knife (3).
  6. Letter opener according to one of claims 1 to 5, characterised in that the pressure roller (5) rolls along an upper rail (40) and the knife shoulder rolls along a lower rail (4).
  7. Letter opener according to one of claims 1 to 6, characterised in that the height of the rail (4), calculated from the letter-supporting surface towards the top parallel to the knife plane, is 1 to 10 hundredths of a millimetre, advantageously 1/100 to 4/100 mm, larger than half the diameter difference between the cutting edge diameter and the supporting surface of the rail (4) in the region of the shoulder.
  8. Letter opener according to one of claims 1 to 7, characterised in that the letter-supporting surface forms an angle relative to the horizontal and the knife plane is approximately perpendicular to the letter-supporting surface (1).
  9. Letter opener according to one of claims 1 to 8, characterised in that a groove is introduced into the shoulder (4A) for the engagement of the rail (4).
  10. Letter opener according to one of claims 1 to 9, characterised by another shoulder arranged concentrically with the knife (3) and intended to roll along the surface of the letter.
EP98902923A 1997-03-11 1998-02-24 Letter opener Expired - Lifetime EP0910511B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH56897 1997-03-11
CH56897 1997-03-11
CH568/97 1997-03-11
PCT/CH1998/000072 WO1998040227A1 (en) 1997-03-11 1998-02-24 Letter opener

Publications (2)

Publication Number Publication Date
EP0910511A1 EP0910511A1 (en) 1999-04-28
EP0910511B1 true EP0910511B1 (en) 2001-12-19

Family

ID=4190026

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98902923A Expired - Lifetime EP0910511B1 (en) 1997-03-11 1998-02-24 Letter opener

Country Status (5)

Country Link
US (1) US6125732A (en)
EP (1) EP0910511B1 (en)
CA (1) CA2254849C (en)
DE (1) DE59802514D1 (en)
WO (1) WO1998040227A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002002344A1 (en) * 2000-06-30 2002-01-10 Silverbrook Research Pty Ltd A separating device for a print engine
US20050028385A1 (en) * 2003-08-07 2005-02-10 Jun Zheng Letter opener
US20080130209A1 (en) * 2006-12-01 2008-06-05 Dilip Bhavnani Calculator letter opener

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0703097A1 (en) * 1994-09-23 1996-03-27 Hadewe B.V. Method and apparatus for opening an envelope

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US3301117A (en) * 1965-04-30 1967-01-31 Daniel E Spaulding Paper cutter
US3821915A (en) * 1972-07-11 1974-07-02 Paper Pak Prod Inc Fiber cutting apparatus with self-contained blade sharpener
GB1479645A (en) * 1974-11-26 1977-07-13 Paterson Prod Ltd Paper trimmers
US4257294A (en) * 1978-12-28 1981-03-24 Marcal Paper Mills, Inc. Apparatus for severing sheet material
US4448101A (en) * 1980-03-03 1984-05-15 Bulman Products, Inc. Shear cutter
DE3109501C2 (en) * 1981-03-12 1985-05-23 Delta-Real Ets, Balzers Device for opening envelopes
US4419915A (en) * 1982-01-19 1983-12-13 The Staplex Company, Inc. Envelope opener device
GB8432448D0 (en) * 1984-12-21 1985-02-06 Rotarim Ltd Cutting sheet material
GB2215654B (en) * 1988-03-17 1992-10-07 Kenncut Ltd Machines for cutting card,board and like materials
US4960022A (en) * 1989-03-07 1990-10-02 Chuang Kuo C Plastic film cutter
JP2656878B2 (en) * 1991-11-29 1997-09-24 株式会社大西ライト工業所 Sheet material cutting device
US5322001A (en) * 1993-05-28 1994-06-21 Fiskars Oy Ab Paper cutter with circular blades
US5524515A (en) * 1993-05-28 1996-06-11 Fiskars Oy Ab Support panel for a rotary paper cutter
US5440961A (en) * 1994-01-24 1995-08-15 Reynolds Metals Company Film cutting apparatus and method
US5819618A (en) * 1994-05-10 1998-10-13 Martin Yale Industries, Inc. Rotary paper trimmer
JPH09193083A (en) * 1996-01-24 1997-07-29 Onishi Raito Kogyosho:Kk Cutter of sheet material
US5996459A (en) * 1997-08-29 1999-12-07 Fiskars Inc. Paper trimmer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0703097A1 (en) * 1994-09-23 1996-03-27 Hadewe B.V. Method and apparatus for opening an envelope

Also Published As

Publication number Publication date
DE59802514D1 (en) 2002-01-31
US6125732A (en) 2000-10-03
CA2254849C (en) 2006-10-17
WO1998040227A1 (en) 1998-09-17
EP0910511A1 (en) 1999-04-28
CA2254849A1 (en) 1998-09-17

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