EP0029122B1 - Cutting apparatus for an intermittently movable web - Google Patents

Cutting apparatus for an intermittently movable web Download PDF

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Publication number
EP0029122B1
EP0029122B1 EP80106270A EP80106270A EP0029122B1 EP 0029122 B1 EP0029122 B1 EP 0029122B1 EP 80106270 A EP80106270 A EP 80106270A EP 80106270 A EP80106270 A EP 80106270A EP 0029122 B1 EP0029122 B1 EP 0029122B1
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EP
European Patent Office
Prior art keywords
cutting
pawl
cutting wheel
ramp
wheel
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
Application number
EP80106270A
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German (de)
French (fr)
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EP0029122A1 (en
Inventor
Helmut Stock
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International Business Machines Corp
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International Business Machines Corp
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Publication date
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Publication of EP0029122A1 publication Critical patent/EP0029122A1/en
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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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/14—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter
    • B26D1/20—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter coacting with a fixed member
    • B26D1/205—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a circular cutting member, e.g. disc cutter coacting with a fixed member for thin material, e.g. for sheets, strips or the like
    • 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
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/02—Means for moving the cutting member into its operative position for cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/66—Applications of cutting devices
    • B41J11/70—Applications of cutting devices cutting perpendicular to the direction of paper feed
    • B41J11/706—Applications of cutting devices cutting perpendicular to the direction of paper feed using a cutting tool mounted on a reciprocating carrier

Definitions

  • the invention relates to a cutting device for a material web that is only guided in the direction of the normal to the cutting edge of a cutting bar, can be transported step by step and is cut off at a standstill, with a slide that can be moved back and forth along a cutting bar, optionally adjustable in cutting position in at least one direction of movement, on a carriage on a Axially rotatably arranged cutting wheel and a roller arranged on the same axis and running on the material web to be cut, the roller in the cutting position serving as the drive roller for the cutting wheel.
  • Such cutting devices are known in data processing systems, in particular in printers.
  • a cutting device with a reciprocating cutting wheel which, when in contact with a cutting edge, cuts off the form or the like which is advanced via a slot on the cutting edge of the cutting bar itself. There is no provision for restraint here.
  • DE-B No. 2007689 provides a cutting device for sheet material, which can be cut off both in a stationary manner and with a continuous feed.
  • the ring-shaped cutting knife is connected to the knife carriage via a swivel plate in such a way that an actuating rope attached to the swivel plate and causing displacement of the carriage presses the cutting knife against the cutting bar during movement in one direction, while the swivel plate presses against the reversed movement abuts a projection of the carriage so that the cutting knife is raised above the cutting bar, wherein in the end position the annular cutting knife can be lifted off the cutting bar against the force of a spring.
  • the object on which the invention is based is to provide, in such a cutting device, a hold-down which, in the parts of a material web to be cut off, preferably a paper web, provides a flawless cutting edge which also has no warping and does not become bulky at the outer ends of the cutting edge .
  • the outer surface of the drive roller is a cylindrical outer surface that rolls on the material web lying on the cutting bar and that the common axis carrying the drive roller and the cutting wheel is about 3 ° to about 5 ° to the cutting edges running in the direction of the material web -Normal is aligned obliquely, the peripheral speed of the edge of the cutting wheel is about 15 to 17% higher than the peripheral speed of the outer surface of the drive roller during the cutting process.
  • the arrangement is preferably such that the angle which the axis carrying the cutting roller and the driving roller forms with the cutting edge normal is approximately 3.5 °.
  • this new cutting device for example for a printer for bank statements or the like, it is of particular importance if the cutting device itself is accommodated on the carriage carrying the print head and, in the process, provides devices by means of which the cutting roller on one line after the printing process has ended or transferred to work position on several lines and can be returned to the rest position at the end of the cutting process.
  • the arrangement is preferably such that the cutting wheel can be moved into the cutting position when the one ramp is passed over and the cutting wheel can be moved into the rest position when the other ramp is passed over in such a way that the latching claw under the action of the latching claw spring moves downward through the action of the other ramp shifted locking lug of the locking tab engages and sets this.
  • a part of a cutting device 1 which carries on a support arm 2 on an axis 3 a cutting wheel 4 which has a circular cutting edge 5 which is guided along a cutting edge 6 of a cutting bar 7 during the cutting process.
  • a drive roller 8 is arranged, which has a drive cylinder 9.
  • the cutting bar has a ramp 10 which is only schematically indicated in FIG. 1 and also a ramp 11 which can only be seen in FIG. 4B.
  • the cutting bar 7 is, as indicated schematically in FIG. 1, attached to a frame 12.
  • the axis 3 carrying the cutting wheel 4 and the drive roller 8 with the drive cylinder 9 is at an angle between approximately 3 ° and approximately 5 °, preferably at an angle of approximately 3.5 °, against the transport direction the material web to be cut or arranged against the cutting bar normal.
  • the support arm 2 is slightly angled at its upper end. However, this is only important in connection with the position of the cutting bar and its cutting edge, but is not absolutely necessary.
  • the switchover device for the cutting wheel which causes a switchover from the rest position to the cutting position, will be explained in detail.
  • a carriage 33 carrying the printhead and the cutting device of which only a base plate of the cutting device 32 is shown here, with the cutting device which is in the rest position, and causes e.g. line-by-line printing, for example of a record carrier, e.g. a paper web.
  • the cutting device can also be used as such without a printhead.
  • a catch arm 13 is attached to the frame 12 and can be pivoted upwards about a joint.
  • This catch arm 13 carries a catch claw 14 and is held in its latched position by a spring 15 which is suspended between two pins 16.
  • a locking tab 17 is articulated on the carriage 33, which is also held in its rest position by a spring 18 which is suspended on pins 19 and 20.
  • This locking tab 17 has a locking claw 21 and a release claw 22.
  • the support arm 2 has two elongated holes 23 and can therefore slide in the longitudinal direction, ie in the drawing from the bottom up and from the top down, guided by guide bolts 23a for the support arm 2.
  • the support arm 2 also has a Locking lug 24, in which, in the idle state, the locking claw 21 of the locking tab 17, which is normally under spring tension, engages and thus holds the support arm 2 in its lower position.
  • the carriage drive is reversed such that the carriage 33 is now guided all the way to the left.
  • the mode of operation of the ramp 10 should initially only be taken into account in part.
  • the release claw 22 passes under the catch claw 14 of the catch arm 13 against the bias of the spring 15.
  • the catch arm 13 can be rotated about the pivot point (not shown). If now the movement of the carriage starts in the opposite direction, then the release claw 22 remains on the catch claw 14 and thus causes the catch claw 21 to release the catch 24 after a short distance.
  • the support arm with the cutting wheel thereon with the drive roller and drive cylinder can now move upward.
  • the locking tab 17 is still held by the catch arm 13 and undergoes a rotational movement until the catch claw 14 and the release claw 22 slide against one another.
  • the rotational movement of the locking tab now reverses, and the locking claw 21 hits the support arm 2 with a delay, which has now followed the ramp 10, that is to say has made an upward movement, so that the locking claw 21 can no longer lock in the locking lug 24.
  • the cutting wheel now continues to follow the ramp contour and goes completely into the cutting position at the level of the cutting bar 6.
  • the force with which the spring 25 presses the drive cylinder against the material web lying on the cutting bar is also decisive for the size of the angle that the axis 3 with the cutting edge normal.
  • a tensile force of 8 N has proven to be particularly favorable for an angle of 3.5 °.
  • ramps 10 and 11 are designed as guide rails 29 and 30, the guide rail 29 being cranked away from the cutting bar, while the guide rail 30 is at a uniform distance from the cutting bar 7. 2, 3A and 3B that the cutting wheel carries a guide collar 28 at its rear end and that the cutting wheel 4 with the drive roller 8 and drive cylinder 9 can be moved along the axis 3 under spring preload.
  • the cutting wheel 4 runs with the drive roller 8 and drive cylinder 9, guided downwards by the ramp 10.
  • the cutting wheel 4 is also pressed outward by the cranked guide rail 29 and gets into the drive roller 8 and drive cylinder 9 position shown in Fig. 2, ie the circular cutting edge 5 of the cutting wheel 4 lies against the cutting edge 6 of the cutting bar 7, while the drive cylinder 9 of the drive roller 8 runs on the cutting bar and thus on the paper web or material web to be cut off.
  • the guide collar 28 of the cutting wheel 4 runs again onto the ramp 11 and its guide rail 30, is thereby pressed down again, whereupon the latching claw 21 grips the latching nose 24 which has been moved downward and thus the cutting device in its Locked rest position.
  • FIGS. 3A and 3B show again very schematically in FIGS. 3A and 3B, where on the one hand the working position of the cutting wheel is shown in FIG. 3A and the broken position in FIG. 3B shows the rest position of the cutting wheel.
  • the cutting device mounted on a carriage according to the invention does not require holding down the material web to be cut, because due to the inclination of the axis 3 carrying the cutting wheel with drive roller and drive cylinder via the drive cylinder 9 to the material web to be trimmed, a force component acting in the transport direction of the material web and a transversely thereto L irkende be exercised, furthermore by the smaller diameter of the drive cylinder compared to the diameter of the circular cutting edge 5 of the cutting wheel 4, the peripheral speed of the cutting edge is about 15 to 17% greater than the peripheral speed of the drive cylinder 9, which in turn the special force on the surface of the material web to be cut, while at the same time the actual circular cutting edge of the cutting wheel always leads the contact surface of the drive cylinder 9.
  • this new cutting device can consistently achieve consistent, first-class, completely smooth cutting edges over a very large number of cutting processes without any curls at the ends. While the invention has preferably been described in connection with a printhead of a printer, it should be readily apparent to those skilled in the art that this cutting device can also be used in other ways, e.g. can also be used without a printhead.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Replacement Of Web Rolls (AREA)

Description

Die Erfindung betrifft eine Schneidvorrichtung für eine nur in Richtung der Normalen auf die Schneidkante einer Schneidleiste geführte, schrittweise transportierbare, im Stillstand abzuschneidende Materialbahn mit einem längs einer Schneidleiste hin- und herbewegbaren, bei mindestens einer Bewegungsrichtung wahlweise in Schneidposition einstellbaren, an einem Schlitten auf einer Achse drehbar angeordneten Schneidrad und einer auf der gleichen Achse angeordneten, auf der abzuschneidenden Materialbahn laufenden Rolle, wobei die Rolle in Schneidposition als Antriebsrolle für das Schneidrad dient. Derartige Schneidvorrichtungen sind bei Datenverarbeitungsanlagen, insbesondere bei Druckern bekannt.The invention relates to a cutting device for a material web that is only guided in the direction of the normal to the cutting edge of a cutting bar, can be transported step by step and is cut off at a standstill, with a slide that can be moved back and forth along a cutting bar, optionally adjustable in cutting position in at least one direction of movement, on a carriage on a Axially rotatably arranged cutting wheel and a roller arranged on the same axis and running on the material web to be cut, the roller in the cutting position serving as the drive roller for the cutting wheel. Such cutting devices are known in data processing systems, in particular in printers.

Bei derartigen S,nneidvorrichtungen unterscheidet man prinzipiell zwischen Druckvorrichtungen, die von einer sich stetig weiterbewegenden Materialbahn Streifen oder Blätter abschneiden, und solchen Schneidvorrichtungen, die intermittierend jeweils von einer stationär gehaltenen Materialbahn Teile abschneiden. Für einen einwandfreien Schnitt, d.h. für die Herstellung einer sauberen, geradlinigen Schnittkante war es bei den letztgenannten Schneidvorrichtungen bisher absolut zwingend, eine sogenannte Niederhaltung vorzusehen, die die Materialbahn, beispielsweise die Papierbahn im stationären Zustand, während des Schneidvorgangs an die Schneidleiste mit ihrer Schneidkante anpresst. Dies bedingt jedoch, dass für den schrittweisen Weitertransport der abzuschneidenden Materialbahn bzw. Papierbahn die Niederhaltevorrichtung, gekoppelt mit der Transportvorrichtung für die Materialbahn angehoben und wieder abgesenkt werden muss. Dies bedingt einen hohen zusätzlichen Aufwand. Anderseits ist aus der DE-B Nr. 2624255 eine Schneidvorrichtung mit einem hin- und herbewegbaren Schneidrad bekannt, das beim Schneidvorgang an einer Schneidkante anliegend das über einen Schlitz vorgeschobene Formular oder dergleichen an der Schneidkante der Schneidleiste selbst abtrennt. Eine Niederhaltung ist hier nicht vorgesehen. Ferner ist aus der DE-B Nr. 2007689 eine Schneidvorrichtung für blattförmiges Material vorgesehen, das sowohl stationär als auch bei kontinuierlichem Vorschub abgeschnitten werden kann. Zu diesem Zweck ist das ringförmige Schneidmesser über eine Schwenkplatte mit dem Messerschlitten derart verbunden, dass ein an der Schwenkplatte befestigtes, die Verschiebung des Schlittens hervorrufendes Betätigungsseil bei der Bewegung in einer Richtung das Schneidmesser an die Schneidleiste andrückt, während bei der umgekehrten Bewegung die Schwenkplatte an einem Vorsprung des Schlittens anliegt, so dass das Schneidmesser über die Schneidleiste angehoben ist, wobei in der Endlage das ringförmige Schneidmesser gegen die Kraft einer Feder von der Schneidleiste abgehoben werden kann. Damit bei ständigem Vorschub genau rechtwinklig zu den Seitenkanten der abzuschneidenden Papierbahnen abgeschnitten werden kann, ist es erforderlich, dass entweder die Schneidkante der Schneidleiste oder aber die Achse des Schneidrades einen Winkel zur Normalen der Vorschubrichtung bzw. zur Vorschubrichtung des blattförmigen Materials aufweist, dessen Sinus dem Verhältnis der gleichförmigen Vorschubgeschwindigkeit zur Vorschubgeschwindigkeit des Schneidmessers quer zur Materialbahn entspricht. Eine besondere Niederhaltung ist wegen des kontinuierlichen Vorschubs der abzuschneidenden Papierbahn hier nich· Trqesehen. Für einen Schneidvorgang mit stat ' Materialbahn liegt die Achse des Schnei: 3twa in Vorschubrichtung. Dabei wird ebt vie bei kontinuierlich bewegter Materialbahn Niederhaltung durch eine ballig geformte Nabe jewirkt, die einerseits das Schneidmesser selbst trägt und andererseits auf der abzuschneidenden Papierbahn bei der hin- und hergehenden Bewegung des Schneidrades abrollt. Diese Art der Niederhaltung hat jedoch den ganz entscheidenden Nachteil, dass sich das abzuschneidende Material verwirft, so dass sich dabei keine saubere Schnittkante ergibt.In the case of such cutting devices, a distinction is made in principle between printing devices which cut strips or sheets from a continuously moving web of material and cutting devices which intermittently cut off parts from a stationary web of material. For a perfect cut, i.e. for the production of a clean, straight-line cutting edge, it was previously absolutely necessary in the latter cutting devices to provide a so-called hold-down which presses the material web, for example the paper web in the stationary state, onto the cutting bar with its cutting edge during the cutting process . However, this means that the hold-down device, coupled with the transport device for the material web, must be raised and lowered again for the gradual further transport of the material web or paper web to be cut. This requires a lot of additional effort. On the other hand, from DE-B No. 2624255 a cutting device with a reciprocating cutting wheel is known which, when in contact with a cutting edge, cuts off the form or the like which is advanced via a slot on the cutting edge of the cutting bar itself. There is no provision for restraint here. Furthermore, DE-B No. 2007689 provides a cutting device for sheet material, which can be cut off both in a stationary manner and with a continuous feed. For this purpose, the ring-shaped cutting knife is connected to the knife carriage via a swivel plate in such a way that an actuating rope attached to the swivel plate and causing displacement of the carriage presses the cutting knife against the cutting bar during movement in one direction, while the swivel plate presses against the reversed movement abuts a projection of the carriage so that the cutting knife is raised above the cutting bar, wherein in the end position the annular cutting knife can be lifted off the cutting bar against the force of a spring. So that with constant feed it can be cut exactly at right angles to the side edges of the paper web to be cut off, it is necessary that either the cutting edge of the cutting bar or the axis of the cutting wheel has an angle to the normal to the feed direction or to the feed direction of the sheet material, the sine of which The ratio of the uniform feed speed to the feed speed of the cutting knife across the web of material corresponds. A special low-attitude is rqesehen nich here * T due to the continuous advancement of the paper web to be cut off. For a cutting operation with stat 'web of material the axis of cuttin is: 3 twa in the feed direction. With continuously moving material web, ebt vie is held down by a spherical hub, which on the one hand carries the cutting knife itself and on the other hand rolls on the paper web to be cut during the reciprocating movement of the cutting wheel. However, this type of hold-down has the very decisive disadvantage that the material to be cut is warped, so that there is no clean cutting edge.

Die der Erfindung zugrunde liegenden Aufgabe besteht nun darin, bei einer derartigen Schneidvorrichtung eine Niederhaltung zu schaffen, die bei den abzuschneidenden Teilen einer Materialbahn, vorzugsweise einer Papierbahn, eine einwandfreie Schnittkante liefert, die auch an den äusseren Enden der Schnittkante keinerlei Verwerfungen und kein Balligwerden aufweist. Dies wird erfindungsgemäss dadurch erreicht, dass die Mantelfläche der Antriebsrolle eine Zylindermantelfläche ist, die auf der auf der Schneidleiste aufliegenden Materialbahn abrollt und dass die die Antriebsrolle und das Schneidrad tragende gemeinsame Achse um etwa 3° bis etwa 5° zur in Richtung der Materialbahn verlaufenden Schneidkanten-Normalen schräg ausgerichtet ist, wobei beim Schneidvorgang die Umfangsgeschwindigkeit der Kante des Schneidrades etwa 15 bis 17% höher ist als die Umfangsgeschwindigkeit der Mantelfläche der Antriebsrolle. Vorzugsweise ist die Anordnung dabei so getroffen, dass der Winkel, den die die Schneidrolle und die Antriebsrolle tragende Achse mit der Schneidkanten-Normalen bildet, etwa 3,5° beträgt. Das hat den ausserordentlichen Vorteil, dass durch die schräge Anordnung der gemeinsamen, die Antriebsrolle und die Schneidrolle tragenden Achse durch die Mantelfläche der Antriebsrolle eine auf die abzuschneidende Materialbahn einwirkende Kraftkomponente in Transportrichtung der Materialbahn und ausserdem eine Kraftkomponente quer dazu erzeugt wird, während gleichzeitig die Schneidkante gegenüber der Mantelfläche der Antriebsrolle einen kleinen Vorlauf aufweist, so dass sich bei feststehender Materialbahn eine einwandfreie, stetig reproduzierbare, vollkommen glatte Schnittkante ergibt, ohne dass dabei die ablaufende Materialbahn durch Transportrollen oder dergleichen gespannt gehalten oder geführt werden müsste. Das abgeschnitte Stück kann vielmehr frei fliegend in die Ablage gelangen. Bei der Verwendung dieser neuen Schneidvorrichtung beispielsweise für einen Drucker für Bankauszüge oder dergleichen, ist es von besonderer Bedeutung, wenn man die Schneidvorrichtung selbst auf dem den Druckkopf tragenden Schlitten mit unterbringt und dabei Einrichtungen vorsieht, durch die die Schneidrolle nach Beendigung des Druckvorganges auf einer Zeile oder auf mehreren Zeilen in Arbeitsposition überführt und am Ende des Schneidvorgangs in Ruhestellung zurückgeführt werden kann. Dies wird in weiterer Ausgestaltung der Erfindung dadurch erzielt, dass die an den beiden äusseren Enden der Schneidleiste jeweils vorgesehene Rampe nach unten ansteigt, dass der die Schneidrolle und die Antriebsrolle tragende Tragarm auf dem Gestell des Schlittens in vertikaler Richtung gleitend verschiebbar angeordnet und durch eine Arretierung gegen Federvorspannung in seiner Ruheposition gehalten ist, dass dabei der Tragarm als Arretierung eine Rastnase und eine mit einer Rastklaue und einer Auslöseklaue versehene, unter Federvorspannung stehende verschwenkbare Verriegelungslasche aufweist, wobei in Ruheposition die Rastklaue die Rastnase übergreift und dass am Gestellrahmen ein ebenfalls unter Federvorspannung stehender, verschwenkbarer Fangarm mit Fangklaue angebracht ist, durch die beim Einfahren des Schlittens in den Fangbereich der Fangklaue diese die Auslöseklaue zu ergreifen vermag, wodurch bei Bewegung des Schlittens in entgegengesetzter Richtung die Rastklaue ihrerseits die Rastnase der Verriegelungslasche für eine Bewegung des Schneidrades in Schneidposition freigibt. Vorzugsweise ist die Anordnung dabei so getroffen, dass das Schneidrad bei Überfahren der einen Rampe in Schneidposition überführbar und beim Überfahren der anderen Rampe das Schneidrad derart in die Ruheposition überführbar ist, dass die Rastklaue unter Wirkung der Rastklauenfeder in die durch Wirkung der anderen Rampe nach unten verschobene Rastnase der Verriegelungslasche eingreift und diese festlegt.The object on which the invention is based is to provide, in such a cutting device, a hold-down which, in the parts of a material web to be cut off, preferably a paper web, provides a flawless cutting edge which also has no warping and does not become bulky at the outer ends of the cutting edge . This is achieved according to the invention in that the outer surface of the drive roller is a cylindrical outer surface that rolls on the material web lying on the cutting bar and that the common axis carrying the drive roller and the cutting wheel is about 3 ° to about 5 ° to the cutting edges running in the direction of the material web -Normal is aligned obliquely, the peripheral speed of the edge of the cutting wheel is about 15 to 17% higher than the peripheral speed of the outer surface of the drive roller during the cutting process. The arrangement is preferably such that the angle which the axis carrying the cutting roller and the driving roller forms with the cutting edge normal is approximately 3.5 °. This has the extraordinary advantage that the oblique arrangement of the common axis carrying the drive roller and the cutting roller through the lateral surface of the drive roller generates a force component acting on the material web to be cut in the transport direction of the material web and also a force component transversely to it, while at the same time the cutting edge has a small lead compared to the outer surface of the drive roller, so that when the material web is stationary, it is perfect, constantly reproducible, and perfect results in a smooth cutting edge without the running material web having to be held or guided under tension by transport rollers or the like. The cut piece can rather freely fly into the tray. When using this new cutting device, for example for a printer for bank statements or the like, it is of particular importance if the cutting device itself is accommodated on the carriage carrying the print head and, in the process, provides devices by means of which the cutting roller on one line after the printing process has ended or transferred to work position on several lines and can be returned to the rest position at the end of the cutting process. This is achieved in a further embodiment of the invention in that the ramp provided at each of the two outer ends of the cutting bar rises downward, that the support arm carrying the cutting roller and the drive roller is arranged so as to be slidable in the vertical direction on the frame of the slide and by a locking mechanism is held against spring bias in its rest position that the support arm has a locking lug and a pivoting locking tab provided with a locking claw and a release claw, which is under spring preload, the locking claw overlapping the locking lug in the rest position and that a frame spring that is also under spring preloading , pivotable catch arm with catch claw is attached, by which when the carriage is moved into the catch area of the catch claw, the catch claw is able to grip it, so that when the carriage moves in the opposite direction, the catch claw in turn di e Releases the latch of the locking tab for movement of the cutting wheel in the cutting position. The arrangement is preferably such that the cutting wheel can be moved into the cutting position when the one ramp is passed over and the cutting wheel can be moved into the rest position when the other ramp is passed over in such a way that the latching claw under the action of the latching claw spring moves downward through the action of the other ramp shifted locking lug of the locking tab engages and sets this.

Die Erfindung wird nun anhand eines Ausführungsbeispiels in Verbindung mit den beigefügten Zeichnungen im einzelnen beschrieben. Die für schutzwürdig erachteten Merkmale der Erfindung sind im einzelnen den Patentansprüchen zu entnehmen.The invention will now be described in detail using an exemplary embodiment in conjunction with the accompanying drawings. The features of the invention deemed worthy of protection can be found in detail in the patent claims.

In den Zeichnungen zeigen

  • Fig. 1 eine Teilansicht der neuen Schneidvorrichtung mit einem Teil der Umschaltvorrichtung,
  • Fig. 2 eine seitliche Teilschnittansicht der neuen Schneidvorrichtung,
  • Fig. 3A und 3B zwei Ansichten des eigentlichen Schneidrades in Ruhelage und in Arbeitslage,
  • Fig. 4A und 4B die Schneidleiste mit den daran angebrachten Leitschienen mit den zur Einleitung bzw. Beendigung des Schneideingriffs des Schneidrades dienenden Rampen.
Show in the drawings
  • 1 is a partial view of the new cutting device with part of the switching device,
  • 2 is a partial sectional side view of the new cutting device,
  • 3A and 3B are two views of the actual cutting wheel in the rest position and in the working position,
  • 4A and 4B the cutting bar with the guide rails attached to it with the ramps used to initiate or end the cutting engagement of the cutting wheel.

In Fig. 1 ist ein Teil einer Schneidvorrichtung 1 gezeigt, die auf einem Tragarm 2 an einer Achse 3 ein Schneidrad 4 trägt, das eine kreisförmige Schneide 5 aufweist, die beim Schneidvorgang längs einer Schneidkante 6 einer Schneidleiste 7 entlanggeführt wird. Auf der gleichen Achse 3 ist, fest mit dem Schneidrad verbunden oder aus einem Stück gefertigt, eine Antriebsrolle 8 angeordnet, die einen Antriebszylinder 9 aufweist. Wie insbesondere aus Fig. 4B deutlich zu erkennen ist, weist die Schneidleiste eine in Fig. 1 nur schematisch angedeutete Rampe 10 und ausserdem eine nur in Fig. 4B zu erkennende Rampe 11 auf. Die Schneidleiste 7 ist dabei, wie schematisch in Fig. 1 angedeutet, an einem Gestellrahmen 12 befestigt. Wie noch im einzelnen zu zeigen sein wird, ist die das Schneidrad 4 und die Antriebsrolle 8 mit Antriebszylinder 9 tragende Achse 3 unter einem Winkel zwischen etwa 3° und etwa 5°, vorzugsweise unter einem Winkel von etwa 3,5°, gegen die Transportrichtung der abzuschneidenden Materialbahn oder gegen die Schneidleisten-Normale angeordnet. Wie man ferner aus Fig. 2 deutlich erkennt, ist der Tragarm 2 an seinem oberen Ende etwas abgewinkelt. Dies hat jedoch nur Bedeutung in Verbindung mit der Stellung der Schneidleiste und ihrer Schneidkante, ist jedoch nicht zwingend erforderlich.In Fig. 1 a part of a cutting device 1 is shown, which carries on a support arm 2 on an axis 3 a cutting wheel 4 which has a circular cutting edge 5 which is guided along a cutting edge 6 of a cutting bar 7 during the cutting process. On the same axis 3, fixed to the cutting wheel or made from one piece, a drive roller 8 is arranged, which has a drive cylinder 9. As can be clearly seen in particular from FIG. 4B, the cutting bar has a ramp 10 which is only schematically indicated in FIG. 1 and also a ramp 11 which can only be seen in FIG. 4B. The cutting bar 7 is, as indicated schematically in FIG. 1, attached to a frame 12. As will be shown in more detail, the axis 3 carrying the cutting wheel 4 and the drive roller 8 with the drive cylinder 9 is at an angle between approximately 3 ° and approximately 5 °, preferably at an angle of approximately 3.5 °, against the transport direction the material web to be cut or arranged against the cutting bar normal. As can also be clearly seen from Fig. 2, the support arm 2 is slightly angled at its upper end. However, this is only important in connection with the position of the cutting bar and its cutting edge, but is not absolutely necessary.

Bevor auf die Wirkungsweise im einzelnen eingegangen wird, soll die Umschaltvorrichtung für das Schneidrad, das eine Umschaltung aus der Ruhelage in die Schneidposition bewirkt, im einzelnen dargelegt werden. Beim normalen Druckvorgang fährt der z.B. einen Druckkopf und die Schneidvorrichtung tragende Schlitten 33, von dem hier nur eine Grundplatte der Schneidvorrichtung 32 gezeigt ist, mit der in Ruhestellung befindlichen Schneidvorrichtung hin und her und bewirkt z.B. ein zeilenweises Bedrucken, beispielsweise eines Aufzeichnungsträgers, z.B. einer Papierbahn. Selbstverständlich ist die Schneidvorrichtung als solche auch ohne Druckkopf für sich einsetzbar.Before the mode of operation is discussed in detail, the switchover device for the cutting wheel, which causes a switchover from the rest position to the cutting position, will be explained in detail. During normal printing the e.g. a carriage 33 carrying the printhead and the cutting device, of which only a base plate of the cutting device 32 is shown here, with the cutting device which is in the rest position, and causes e.g. line-by-line printing, for example of a record carrier, e.g. a paper web. Of course, the cutting device can also be used as such without a printhead.

Um die in Ruhestellung befindliche Schneidvorrichtung in ihre Arbeitsstellung zu überführen, ist eine besondere Auslöse- und Umschaltvorrichtung vorgesehen, die nachfolgend im einzelnen beschrieben werden soll.In order to bring the cutting device in the rest position into its working position, a special triggering and switching device is provided, which will be described in detail below.

Wie man zunächst aus Fig. 1 deutlich erkennt, ist an dem Gestellrahmen 12 ein Fangarm 13 angebracht, der um ein Gelenk nach oben verschwenkbar ist. Dieser Fangarm 13 trägt eine Fangklaue 14 und wird durch eine Feder 15, die zwischen zwei Zapfen 16 eingehängt ist, in seiner Raststellung gehalten. Ferner ist auf dem Schlitten 33 selbst eine Verriegelungslasche 17 gelenkig angebracht, die ebenfalls über eine Feder 18, die an Zapfen 19 und 20 eingehängt ist, in ihrer Ruhestellung gehalten ist. Diese Verriegelungslasche 17 weist eine Rastklaue 21 und eine Auslöseklaue 22 auf. Der Tragarm 2 weist zwei Langlöcher 23 auf und vermag daher in Längsrichtung, d.h. in der Zeichnung von unten nach oben und von oben nach unten, geführt durch Führungsbolzen 23a für den Tragarm 2, zu gleiten. Der Tragarm 2 weist ferner eine Rastnase 24 auf, in die im Ruhezustand normalerweise die unter Federvorspannung stehende Rastklaue 21 der Verriegelungslasche 17 eingreift und damit den Tragarm 2 in seiner unteren Position festhält.As can first be clearly seen from FIG. 1, a catch arm 13 is attached to the frame 12 and can be pivoted upwards about a joint. This catch arm 13 carries a catch claw 14 and is held in its latched position by a spring 15 which is suspended between two pins 16. Furthermore, a locking tab 17 is articulated on the carriage 33, which is also held in its rest position by a spring 18 which is suspended on pins 19 and 20. This locking tab 17 has a locking claw 21 and a release claw 22. The support arm 2 has two elongated holes 23 and can therefore slide in the longitudinal direction, ie in the drawing from the bottom up and from the top down, guided by guide bolts 23a for the support arm 2. The support arm 2 also has a Locking lug 24, in which, in the idle state, the locking claw 21 of the locking tab 17, which is normally under spring tension, engages and thus holds the support arm 2 in its lower position.

Wenn nun die Schneidvorrichtung 1 in Schneidposition überführt werden soll (in Druckposition ist das Schneidrad zurückgezogen), dann wird der Schlittenantrieb so umgesteuert, dass nunmehr der Schlitten 33 bis ganz nach links hinausgeführt wird. Die Wirkungsweise der Rampe 10 soll dabei zunächst nur zum Teil berücksichtigt werden. In der äussersten linken Position des Schlittens, von dem nur die Grundplatte 32 gezeigt ist, unterfährt die Auslöseklaue 22 die Fangklaue 14 des Fangarms 13 gegen die Vorspannung der Feder 15. Dabei ist der Fangarm 13 um den nicht näher bezeichneten Gelenkpunkt drehbar. Wenn nunmehr die Bewegung des Schlittens in Gegenrichtung einsetzt, dann bleibt die Auslöseklaue 22 an der Fangklaue 14 hängen und bewirkt damit, dass die Rastklaue 21 die Rastnase 24 nach einer kurzen Strecke freigibt. Unter Einwirkung der Kraft der Feder 25 kann sich nun der Tragarm mit dem daran befindlichen Schneidrad mit Antriebsrolle und Antriebszylinder, soweit dies die Rampe 10 zulässt, nach oben bewegen. Während der Aufwärtsbewegung des Tragarms 2 wird zunächst die Verriegelungslasche 17 noch vom Fangarm 13 gehalten und erfährt so lange eine Drehbewegung, bis die Fangklaue 14 und die Auslöseklaue 22 aneinander abgleiten. Die Drehbewegung der Verriegelungslasche kehrt jetzt um, und die Rastklaue 21 trifft verzögert auf den Tragarm 2, der mittlerweile der Rampe 10 gefolgt ist, also eine Aufwärtsbewegung gemacht hat, so dass die Rastklaue 21 nicht mehr in der Rastnase 24 verriegeln kann. Das Schneidrad folgt jetzt weiter der Rampenkontur und geht vollends in Schneidposition in Höhe der Schneidleiste 6. Die Kraft, mit der die Feder 25 den Antriebszylinder gegen die auf der Schneidleiste aufliegende Materialbahn andrückt, ist mit für die Grösse des Winkels bestimmend, den die Achse 3 mit der Schneidkanten-Normalen bildet. Im vorliegenden Fall hat sich für einen Winkel von 3,5° eine Zugkraft von 8 N als besonders günstig erwiesen.If the cutting device 1 is now to be transferred into the cutting position (the cutting wheel is retracted in the printing position), then the carriage drive is reversed such that the carriage 33 is now guided all the way to the left. The mode of operation of the ramp 10 should initially only be taken into account in part. In the extreme left position of the slide, of which only the base plate 32 is shown, the release claw 22 passes under the catch claw 14 of the catch arm 13 against the bias of the spring 15. The catch arm 13 can be rotated about the pivot point (not shown). If now the movement of the carriage starts in the opposite direction, then the release claw 22 remains on the catch claw 14 and thus causes the catch claw 21 to release the catch 24 after a short distance. Under the action of the force of the spring 25, the support arm with the cutting wheel thereon with the drive roller and drive cylinder, as far as the ramp 10 permits, can now move upward. During the upward movement of the support arm 2, the locking tab 17 is still held by the catch arm 13 and undergoes a rotational movement until the catch claw 14 and the release claw 22 slide against one another. The rotational movement of the locking tab now reverses, and the locking claw 21 hits the support arm 2 with a delay, which has now followed the ramp 10, that is to say has made an upward movement, so that the locking claw 21 can no longer lock in the locking lug 24. The cutting wheel now continues to follow the ramp contour and goes completely into the cutting position at the level of the cutting bar 6. The force with which the spring 25 presses the drive cylinder against the material web lying on the cutting bar is also decisive for the size of the angle that the axis 3 with the cutting edge normal. In the present case, a tensile force of 8 N has proven to be particularly favorable for an angle of 3.5 °.

In diesem Zusammenhang muss allerdings auf die Ausgestaltung der Rampen 10 und 11 etwas näher eingegangen werden. Wie man aus Fig. 4A und 4B deutlich erkennt, sind die Rampen 10 und 11 als Leitschienen 29 und 30 ausgestaltet, wobei die Leitschiene 29 von der Schneidleiste weg gekröpft ist, während die Leitschiene 30 einen gleichförmigen Abstand von der Schneidleiste 7 aufweist. Ferner erkennt man aus Fig. 2, 3A und 3B, dass das Schneidrad an seinem hinteren Ende einen Führungsbund 28 trägt und dass das Schneidrad 4 mit Antriebsrolle 8 und Antriebszylinder 9 unter Federvorspannung längs der Achse 3 verschiebbar sind. Wenn die Schneidvorrichtung sich im Ruhezustand befindet und über die Endstellung beim Druckvorgang nach links hinaus geführt wird, dann läuft das Schneidrad 4 mit Antriebsrolle 8 und Antriebszylinder 9, geführt durch die Rampe 10 nach unten. Wenn jetzt bei der Bewegung in entgegengesetzter Richtung des Schlittens 33 der Tragarm 2 mit Schneidrad 4, Antriebsrolle 8 und Antriebszylinder 9 frei kommt, dann wird das Schneidrad 4 ausserdem durch die gekröpfte Leitschiene 29 nach aussen gedrückt und gerät mit Antriebsrolle 8 und Antriebszylinder 9 in die in Fig. 2 gezeigte Position, d.h. die kreisförmige Schneide 5 des Schneidrads 4 liegt an der Schneidkante 6 der Schneidleiste 7 an, während der Antriebszylinder 9 der Antriebsrolle 8 auf der Schneidleiste und damit auf der abzuschneidenden Papierbahn oder Materialbahn läuft. Wenn dann der Schneidvorgang beendet ist, läuft der Führungsbund 28 des Schneidrades 4 wieder auf die Rampe 11 und deren Leitschiene 30 auf, wird dadurch wieder nach unten gedrückt, worauf die Rastklaue 21 die nach unten verschobene Rastnase 24 wieder ergreift und damit die Schneidvorrichtung in ihrer Ruhestellung verriegelt. Gleichzeitig wird dabei das Schneidrad 4 mit Antriebsrolle 8 und Antriebszylinder 9 durch die Kraft der Feder 31 in die Ruhelage überführt. Dies ist noch einmal ganz schematisch in den Fig. 3A und 3B gezeigt, wo man einerseits in Fig. 3A die Arbeitslage des Schneidrades und in Fig. 3B, gestrichelt eingezeichnet, die Ruhelage des Schneidrades erkennt.In this context, however, the design of ramps 10 and 11 must be discussed in more detail. As can be clearly seen from FIGS. 4A and 4B, the ramps 10 and 11 are designed as guide rails 29 and 30, the guide rail 29 being cranked away from the cutting bar, while the guide rail 30 is at a uniform distance from the cutting bar 7. 2, 3A and 3B that the cutting wheel carries a guide collar 28 at its rear end and that the cutting wheel 4 with the drive roller 8 and drive cylinder 9 can be moved along the axis 3 under spring preload. When the cutting device is in the idle state and is guided beyond the end position during the printing process to the left, then the cutting wheel 4 runs with the drive roller 8 and drive cylinder 9, guided downwards by the ramp 10. If the support arm 2 with cutting wheel 4, drive roller 8 and drive cylinder 9 is now free when moving in the opposite direction of the slide 33, then the cutting wheel 4 is also pressed outward by the cranked guide rail 29 and gets into the drive roller 8 and drive cylinder 9 position shown in Fig. 2, ie the circular cutting edge 5 of the cutting wheel 4 lies against the cutting edge 6 of the cutting bar 7, while the drive cylinder 9 of the drive roller 8 runs on the cutting bar and thus on the paper web or material web to be cut off. When the cutting process is then completed, the guide collar 28 of the cutting wheel 4 runs again onto the ramp 11 and its guide rail 30, is thereby pressed down again, whereupon the latching claw 21 grips the latching nose 24 which has been moved downward and thus the cutting device in its Locked rest position. At the same time, the cutting wheel 4 with the drive roller 8 and drive cylinder 9 is brought into the rest position by the force of the spring 31. This is shown again very schematically in FIGS. 3A and 3B, where on the one hand the working position of the cutting wheel is shown in FIG. 3A and the broken position in FIG. 3B shows the rest position of the cutting wheel.

Zusammenfassend kann also folgendes gesagt werden. Die auf einem Schlitten angebrachte Schneidvorrichtung gemäss der Erfindung benötigt keine Niederhaltung der abzuschneidenden Materialbahn, weil durch die Schrägstellung der das Schneidrad mit Antriebsrolle und Antriebszylinder tragenden Achse 3 über den Antriebszylinder 9 auf die zu beschneidende Materialbahn eine in Transportrichtung der Materialbahn wirkende Kraftkomponente und eine quer dazL irkende ausgeübt werden, weit ferner durch den geringeren Durchmesser des Antriebszylinders im Vergleich zum Durchmesser der kreisförmigen Schneide 5 des Schneidrades 4 die Umfangsgeschwindigkeit der Schneide etwa 15 bis 17% grösser ist als die Umfangsgeschwindigkeit des Antriebszylinders 9, was wiederum die besondere Krafteinwirkung auf die Oberfläche der abzuschneidenden Materialbahn zur Folge hat, während gleichzeitig die eigentliche kreisförmige Schneide des Schneidrades immer der Anlagefläche des Antriebszylinders 9 vorauseilt. Die Umschaltung der Schneidvorrichtung aus der Ruhestellung in die Arbeitsstellung und zurück erfolgt mit Hilfe zweier neuartig ausgestalteter Rampen, die als Leitschienen 29 und 30 ausgebildet sind und über einen am Schneidrad 4 angebrachten Führungsbund 28, der über die gekröpfte Leitschiene 29 das Schneidrad 4 gegen die Druckfeder 31 in die in Fig. 3A gezeigte Stellung abhebt und damit nach Auslösen der Verriegelung an der Verriegelungslasche 17 das Schneidrad in die in Fig. 2 gezeigte Schneidposition überführt. Die Rückführung ist ebenfalls denkbar einfach, d.h., dass dann, wenn der Führungsbund 28 des Schneidrades 4 an der Rampe 11 auf die Leitschiene 30 aufläuft, wird damit die gesamte Schneidvorrichtung an ihrem Tragarm 2 nach unten gedrückt und rastet damit mit der Rastnase 24 an der Rastklaue 21 der Verriegelungslasche 17 ein und bleibt damit in Ruhestellung. Diese Ruhestellung ist in Fig. 3B als Phantomdarstellung zu sehen.In summary, the following can be said. The cutting device mounted on a carriage according to the invention does not require holding down the material web to be cut, because due to the inclination of the axis 3 carrying the cutting wheel with drive roller and drive cylinder via the drive cylinder 9 to the material web to be trimmed, a force component acting in the transport direction of the material web and a transversely thereto L irkende be exercised, furthermore by the smaller diameter of the drive cylinder compared to the diameter of the circular cutting edge 5 of the cutting wheel 4, the peripheral speed of the cutting edge is about 15 to 17% greater than the peripheral speed of the drive cylinder 9, which in turn the special force on the surface of the material web to be cut, while at the same time the actual circular cutting edge of the cutting wheel always leads the contact surface of the drive cylinder 9. The switching of the cutting device from the rest position to the working position and back takes place with the help of two newly designed ramps, which are designed as guide rails 29 and 30 and via a guide collar 28 attached to the cutting wheel 4 and the cutting wheel 4 against the compression spring via the cranked guide rail 29 31 lifts up into the position shown in FIG. 3A and thus transfers the cutting wheel into the cutting position shown in FIG. 2 after the locking on the locking tab 17 has been triggered. The return is also very simple, that is, when the guide collar 28 of the cutting wheel 4 runs on the ramp 11 onto the guide rail 30, the entire cutting device becomes device on its support arm 2 pressed down and thus snaps with the locking lug 24 on the locking claw 21 of the locking tab 17 and thus remains in the rest position. This rest position can be seen in FIG. 3B as a phantom representation.

Mit dieser Vorrichtung ist im Prinzip, wie leicht zu erkennen, ein Schneidvorgang nur in einer Bewegungsrichtung des Schlittens möglich. Es ist jedoch denkbar, die Achse 3, die Schneidrad, Antriebsrolle und Antriebszylinder trägt, je nach Bewegungsrichtung umsteuerbar anzubringen, so dass auch in der Gegenrichtung geschnitten werden kann, wenn dabei die Ausrichtung der Achse in entgegengesetzter Richtung ebenfalls um 3 bis 5°, vorzugsweise um 3,5°, gegen die Schneidkanten-Normale schräg angeordnet ist. Wie sich bei ausgedehnten Versuchen gezeigt hat, lassen sich mit dieser neuen Schneidvorrichtung über eine sehr grosse Anzahl von Schneidvorgängen ständig gleich bleibende, erstklassige, vollkommen glatte Schnittkanten ohne Wellungen an den Enden wiederholbar erzielen. Die Erfindung wurde zwar in Verbindung vorzugsweise mit einem Druckkopf eines Druckers beschrieben, es sollte dem Fachmann jedoch ohne weiteres einleuchten, dass diese Schneidvorrichtung auch in anderer Weise, d.h. auch ohne Druckkopf einsetzbar ist.With this device, in principle, as can be easily recognized, a cutting process is only possible in one direction of movement of the slide. However, it is conceivable to attach the axis 3, which carries the cutting wheel, drive roller and drive cylinder, in a reversible manner depending on the direction of movement, so that cutting can also be carried out in the opposite direction if the alignment of the axis in the opposite direction is also 3 to 5 °, preferably by 3.5 °, is inclined against the cutting edge normal. As has been shown in extensive tests, this new cutting device can consistently achieve consistent, first-class, completely smooth cutting edges over a very large number of cutting processes without any curls at the ends. While the invention has preferably been described in connection with a printhead of a printer, it should be readily apparent to those skilled in the art that this cutting device can also be used in other ways, e.g. can also be used without a printhead.

Claims (6)

1. Cutting device for web of material transportable stepwise, cut in its stationary state and guided only in the direction of the normal towards the cutting edge of a cutting bar with a cutting wheel (4) executing a reciprocating movement along the cutting edge (7), which in at least one direction of movement can selectively be activated into a cutting position and which is rotatably arranged on an axle (3) mounted on a carriage (33), and with a roller arranged on the same axle (3) and rolling on the web of material to be cut off, the roller serving in its cutting position as driving roller (8) for the cutting wheel (4), characterized in that
the surface (9) of the driving roller (8) is a cylindrical circumferential surface which rolls on the web of material placed on the cutting bar (7), that in this process the common axle (3) supporting driving roller (8) and cutting wheel (4) is arranged obliquely at approximately 3° to approximately 5° to the normal of the cutting edge extending in the direction of the web of material, and that during the cutting process the circumferential speed of the edge of the cutting wheel (4) is approximately 15 to 17% higher than the circumferential speed of the circumferential surface of the driving roller (8).
2. Cutting device as claimed in claim 1, characterized in that the angle enclosed by the axle (3) supporting the cutting wheel and the driving roller (8) and by the normal to the cutting edge is approximately 3.5°.
3. Cutting device as claimed in claims 1 and 2, where for controlling the change-over of the cutting wheel from its position of rest into its operating position, and vice versa, a ramp is provided at each end of its path of motion, as well as a locking device disengageable and engageable when the cutting wheel mounts one of the ramps, characterized in that the respective ramp (10, 11 ) provided at the two outer ends of the cutting bar slopes downward, that the supporting arm (2) supporting the cutting wheel (4) and the driving roller (8) is slidably mounted (23, 23a) in vertical direction on the frame of the carriage (33), and by an arresting device maintained in its position of rest against spring bias (25), that there the supporting arm (2) as an arresting unit is provided with an engaging lug (24) and a spring biased (18) pivotable lachting pawl (17) equipped with an engaging pawl (21) and a disengaging pawl (22), the engaging pawl (21) gripping the engaging lug (24) in position of rest, and that the frame (12) is equipped with a spring biased (15) pivotable catching arm (13) fitted with a catching pawl (14) by means of which, upon the entry of the carriage in the catching zone of the catching pawl (14), the latter can grip the disengaging pawl (22), whereby upon the movement of the carriage in the opposite direction the engaging pawl releases the engaging lug (24) of the latching pawl (17) for a movement of the cutting wheel in cutting position.
4. Cutting device as claimed in claim 3, characterized in that when moving over the other ramp (11) a cutting wheel is transferable into the position of rest in such a manner that under the influence of the engaging pawl spring (18) the engaging pawl (21) engages and fixes the engaging lug (24) of latching pawl (17), said engaging lug having been displaced downward under the influence of the other ramp (11).
5. Cutting device as claimed in claim 4, characterized in that the one ramp (10) is provided with an outwardly curved guiding rail (29), that the other ramp (11) is provided with a straight guiding rail (30), that furthermore the cutting wheel (4) carries on its back a guiding collar (28) which, when mounting one or the other ramp (10, 11), is guided on the respective guiding rail, and that the cutting wheel (4) is outwardly shiftable on its axle (3) in axial direction against the biasing of a spring (31).
EP80106270A 1979-11-10 1980-10-15 Cutting apparatus for an intermittently movable web Expired EP0029122B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2945453 1979-11-10
DE2945453 1979-11-10

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EP0029122B1 true EP0029122B1 (en) 1983-06-29

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EP80106270A Expired EP0029122B1 (en) 1979-11-10 1980-10-15 Cutting apparatus for an intermittently movable web

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3430443A1 (en) * 1984-08-18 1986-02-20 Ibm Deutschland Gmbh, 7000 Stuttgart CUTTING DEVICE FOR PAPER AND FILM SHEETS, ESPECIALLY FOR PRINTING UNITS, PLOTTERS, COPYING DEVICES AND SIMILAR MACHINES
DE3510995A1 (en) * 1985-03-27 1986-10-09 Mannesmann Kienzle GmbH, 7730 Villingen-Schwenningen CUTTING DEVICE FOR FORM RAILWAYS
GB2213756B (en) * 1987-12-17 1992-09-30 Pitney Bowes Inc Cutter module for a modular mailing machine
DE4205774C2 (en) * 1992-02-21 1994-06-16 Mannesmann Ag Cutting device for form webs
US5819618A (en) * 1994-05-10 1998-10-13 Martin Yale Industries, Inc. Rotary paper trimmer
US6423233B1 (en) 2000-08-15 2002-07-23 Biogal Gyogyszergyar Rt. Purification process

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Publication number Priority date Publication date Assignee Title
US1960175A (en) * 1933-02-10 1934-05-22 Coppet & Doremus De Cutter for typewriters
DE2343858C3 (en) * 1973-08-30 1979-05-03 Nixdorf Computer Ag, 4790 Paderborn Electromechanical writing mechanism with roller knife
DE7713410U1 (en) * 1977-04-28 1977-08-18 Adlerwerke Vorm. Heinrich Kleyer Ag, 6000 Frankfurt CUTTING DEVICE FOR PAPER TRAILS, IN PARTICULAR IN PRINTING UNITS OF DATA PROCESSING SYSTEMS

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DE3063986D1 (en) 1983-08-04

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