EP0180769B1 - High performance printer feeding device - Google Patents

High performance printer feeding device Download PDF

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Publication number
EP0180769B1
EP0180769B1 EP85112509A EP85112509A EP0180769B1 EP 0180769 B1 EP0180769 B1 EP 0180769B1 EP 85112509 A EP85112509 A EP 85112509A EP 85112509 A EP85112509 A EP 85112509A EP 0180769 B1 EP0180769 B1 EP 0180769B1
Authority
EP
European Patent Office
Prior art keywords
printer
paper web
feed
paper
roller
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
EP85112509A
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German (de)
French (fr)
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EP0180769A3 (en
EP0180769A2 (en
Inventor
Rolf Schmidt
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.)
Sueka Druck und Graphotechnik Te Rheinstetten GmbH
Original Assignee
SUEKA SUEDD SPEZDRUCK JUNG H
Sueka Sueddeutsche Spezialdruckerei Hermann Jung GmbH
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
Priority claimed from DE19843440799 external-priority patent/DE3440799C2/en
Priority claimed from DE19853525600 external-priority patent/DE3525600A1/en
Application filed by SUEKA SUEDD SPEZDRUCK JUNG H, Sueka Sueddeutsche Spezialdruckerei Hermann Jung GmbH filed Critical SUEKA SUEDD SPEZDRUCK JUNG H
Priority to AT85112509T priority Critical patent/ATE54612T1/en
Publication of EP0180769A2 publication Critical patent/EP0180769A2/en
Publication of EP0180769A3 publication Critical patent/EP0180769A3/en
Application granted granted Critical
Publication of EP0180769B1 publication Critical patent/EP0180769B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/02—Advancing webs by friction roller
    • 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
    • B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
    • B41J15/04—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
    • B41J15/06—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles characterised by being applied to printers having stationary carriages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/32—Arrangements for turning or reversing webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/30—Orientation, displacement, position of the handled material
    • B65H2301/31—Features of transport path
    • B65H2301/311—Features of transport path for transport path in plane of handled material, e.g. geometry
    • B65H2301/3112—S-shaped

Definitions

  • the invention relates to a feed device for a high-performance printer, such as a laser printer, with guide and deflection rollers, the paper being drawn off from the outside of the printer as a continuous paper web folded in a large stack, guided below the printer and passed to the printing unit through a feed shaft of the printer (see DE-U 8 137 577).
  • a high-performance printer such as a laser printer
  • guide and deflection rollers the paper being drawn off from the outside of the printer as a continuous paper web folded in a large stack, guided below the printer and passed to the printing unit through a feed shaft of the printer (see DE-U 8 137 577).
  • High-performance printers in the form of laser printers have been known for some time, in which paper stacks are used and processed in an integrated stacking shaft. Because of the printing speed, the stacks have to be changed often, so that it is therefore more sensible to feed the paper stored in stacks from outside into the printer directly from a large stack arranged on a pallet. This is possible with the two printers that have been known for a long time, namely the printers IBM 3800 and Siemens ND 2, by inserting them laterally into the paper stack slot. Another smaller type of high-speed printer has come onto the market, namely the Siemens ND 3 printer, in which such insertion is not possible due to the space available and the door or floor construction.
  • the invention is therefore based on the object of avoiding the risk of tearing of a supplied paper web when the printing device is started up.
  • the stated object is achieved in that a scale-like guide base is provided, via which the paper web can be fed.
  • the paper web does not lie on the floor surface over its entire length, but only at the elevated points of the guide base. This considerably reduces the friction, in particular when the printing device is started again, so that the risk of tearing, etc. is reduced or eliminated.
  • a preferred embodiment is characterized in that a double floor with a space for carrying out the continuous paper web to be fed to the printer and at least one feed roller is arranged directly in front of the space in a storage area for storing the printed paper.
  • a feed path for feeding paper from below the printer into the feed shaft is provided in the region of the feed shaft and baffles protrude into the feed path through which the fed paper web is deflected upwards.
  • deflection rollers are provided, at least one of which is driven.
  • This preferred embodiment provides the trigger drive arranged on the high-speed printer with a supporting drive in the region of the running path of the paper web, so that, with appropriate coordination of the drives, the pulling force only has to be applied over a shorter distance, so that the paper web is less stressed overall.
  • a separate drive motor is provided for the driven deflection roller.
  • the driven deflecting roller preferably rotates continuously, so that even when the printer is stopped, it no longer exerts a pulling force and conveys the paper web for a short distance.
  • the continuous drive of the deflecting roller also has the advantage when the printer starts up that the moment the paper web is stretched again, the deflecting roller automatically assumes its supporting drive function. Above all, the pulling force acting abruptly at startup is only transmitted to the section of the paper web located between the printer and the driven deflection roller, while it is dampened and not by the gradual subsequent application of the paper web to the deflection roller until the required transmission friction is finally produced is transferred into the further paper web.
  • deflection rollers which are provided with a drive
  • a driven deflection roller should also be arranged in the paper stacking shaft of the printer.
  • the driven roller with a small parallel distance is assigned a guide roller, and that the paper web first over the driven roller and then over the guide roller Change the direction of rotation between the rollers is performed.
  • the paper web is thus guided in a loop between the driven roller and the guide roller, so that the wrap angle necessary for the transmission of the driving force from the driven roller to the paper web is ensured. This is realized constructively in particular in that the driven roller and the guide roller are offset from one another in the running direction of the paper web and transversely thereto.
  • the scale-like feed floor is designed with ramps slowly rising in the feed direction and steeply falling flanks at the end thereof. This prevents the web from striking the edges of the scales.
  • a turning cross is provided at an entry direction into the high-speed printer which is different from the withdrawal direction of the paper web from the bulk stack and which is arranged from a direction transverse to the withdrawal direction th infeed roller, one, a directly behind this and at an angle of less than 90 degrees to this turning bar and possibly another, arranged transversely to the infeed roller, and that one of the rollers is driven.
  • FIG. 1 shows the high-speed printer 1 with its actual paper stacking shaft 2, through which the paper web 3 is fed to the actual printing unit (not shown) in the printer 1 via a guide plate or a guide roller 4.
  • the printed paper web 3 'comes from the printing unit via guide rollers 5 and is placed on a stack 6 in accordance with the format folding of the paper web.
  • the paper is supplied from large stacks 7, which are arranged, for example, on a standard pallet.
  • the paper stacks with the pallet 9 are not arranged on the side of the paper stack slot 2, but on one end face of the printer 1, so that all feed and continuation rollers have parallel axis orientations.
  • a separate take-off device is used, which initially consists of a frame 10, since a guide roller 11 arranged above the stack has a scanning device 12 and a further guide roller 13 arranged behind the stack in the take-off direction. The guide roller 13 deflects the paper web downward by essentially 90 degrees.
  • the paper web runs behind the stack as far as the floor and is in turn essentially redirected into the horizontal by a deflection device 14 with rollers.
  • the deflection device 14 has rollers, one of which is driven.
  • the paper web is S-shaped through the rollers so that the driven roller can exert a sufficient conveying force on the web 3 by means of friction when the web 1 is under tension; on the other hand, the web 3 detaches from the roller and this rotates freely if no train is exerted on the web 3.
  • the web 3 is then guided under the printer 1 over a scale-like guide floor 18, which consists of a plurality of ramps arranged one behind the other, rising in the guide direction of the paper web 3, and at the end of each ramp at the beginning of the next ramp on a falling flank.
  • This configuration of the guide bottom ensures that the paper web 3, even if no continuously strong pull is exerted on it, rests on the floor only in partial areas; as a result, the friction, in particular when starting up, that is to say when tightening the paper web, is substantially reduced in comparison with a floor design in which the paper web would lie over the entire floor due to the flatness of such a floor.
  • the shaft 22 serves to guide the paper web around the driven roller 21 as far as possible, so that the driving forces of the roller 21 can be optimally transmitted to the paper web.
  • the driven roller 21 advantageously has a rubber or plastic covering to improve the transmission of the driving force. Behind the deflection roller 22, the paper web 3 is guided upwards in order then to get into the actual printing unit via the mentioned guide plate 4 or a further deflection roller 4 '. It is essential that the configuration according to the invention prevents the paper web from being inserted directly into the paper chute of the printer, the chute then having to remain open, which would lead to a high noise level during operation.
  • the paper web 3 'printed in the printing unit is guided over guide rollers 5 to the depositing device (FIG. 2), where it is placed on a plate 26 in a zigzag manner in accordance with its format folding.
  • the depositing device FIG. 2
  • the first step is to counteract this by pushing the folded edges of the web in addition each time it is put down, i.e. the one that takes place when it is put down Buckling is supported.
  • the storage shelf 26 has an elevation 27 in the middle, for example a cross section of an equilateral triangle, so that the first sheets deposited are convexly curved. This also supports the gripping of the bent edges by the push-down grippers.
  • the storage shelf 26 itself is provided with slots 28 in the edge area through which the grippers reach and can assist the depositing of the paper web 3 'on the floor 26.
  • FIG. 4 shows further possibilities for the arrangement of large stacks 7 relative to the printer 1 and its storage area 3.1 in a schematic representation, wherein a turnstile is to be provided for the arrangements 7.3 and 7.4, as shown in FIG. 5.
  • This has a guide roller 37, which is arranged transversely to the infeed direction of the paper web 3 and prevents the paper web from escaping upwards.
  • a deflecting rod 38 is positioned at an angle to the direction of travel at approximately the same height. In the exemplary embodiment shown, this deflects the paper web by 90 degrees to the running direction, as can be seen from the directional arrows.
  • the turning cross 35 has in the area of the outlet 39 of the paper web an outlet roller 40 which has a motor-driven drive.
  • the driven outlet roller 40 has, for example, a rubber or plastic covering to improve the transmission of the driving force.
  • a further non-driven roller is arranged offset from the driven outlet roller 40 in such a way that the paper web is deflected several times and bears against the driven outlet roller 40 with a correspondingly large wrap angle.
  • the paper web 3 is guided essentially upwards, in order then to get into the printer accordingly via the roller 20 (FIG. 1).
  • FIG. 1 Another embodiment of essential parts of the device according to the invention is shown in FIG.
  • the paper web 3 is not passed under the entire printer and is introduced into the printer from the side on which the stack is arranged, on the opposite side, as is the case in FIG. 1, but rather directly from below into the discharge shaft 2 of the printer is introduced, for which purpose a guide plate 28 is provided for deflecting the printer into a slot 29 or feed path into which the web 3 is introduced via a shaft or roller 19, and from which it is guided to the roller 21 via a deflection edge 30.
  • This configuration shows a particularly simple insertion option in the event that the web 3 cannot be inserted directly into the feed slot 2 of the printer 1 from the side.

Description

Die Erfindung betrifft eine Zuführvorrichtung für einen Hochleistungsdrucker, wie einen Laserdrucker, mit Führungs- und Umlenkwalzen, wobei das Papier als in einem Großstapel gefaltete Endlospapierbahn von außerhalb des Druckers abgezogen, unterhalb des Druckers geführt und durch einen Zuführschacht des Druckers zum Druckwerk geleitet wird (siehe DE-U 8 137 577).The invention relates to a feed device for a high-performance printer, such as a laser printer, with guide and deflection rollers, the paper being drawn off from the outside of the printer as a continuous paper web folded in a large stack, guided below the printer and passed to the printing unit through a feed shaft of the printer (see DE-U 8 137 577).

Seit einiger Zeit sind Hochleistungsdrucker in Form von Laserdruckern bekannt, bei denen an sich Papierstapel in einen integrierten Stapelschacht eingesetzt und verarbeitet werden. Aufgrund der Druckgeschwindigkeit müssen die Stapel oft gewechselt werden, so daß es daher sinnvoller ist, das in Stapeln abgelegte Papier direkt von einem auf einer Palette angeordneten Großstapel von außerhalb in den Drucker einzuführen. Dies ist bei den zweien schon seit längerer Zeit bekannten Druckern, nämlich den Druckern IBM 3800 und Siemens ND 2 durch seitliches Einführen in den Papierstapelschacht möglich. Es ist ein weiterer kleinerer Schnelldruckertyp auf den Markt gekommen, nämlich der Drucker Siemens ND 3, bei dem ein derartiges Einführen aufgrund der Platzverhältnisse und der Tür- bzw. Bodenkonstruktion nicht möglich ist. Bei diesem Drucker müssen daher wie bisher durch eine Bedienungsperson tragbare, also nicht allzu schwere Stapel, die lediglich wenig tausend Blatt aufweisen können, in den Papierschacht eingesetzt werden, was immer Druckunterbrechungen bedingt, so daß die Leistung eines solchen Druckers nicht optimal genutzt werden kann.High-performance printers in the form of laser printers have been known for some time, in which paper stacks are used and processed in an integrated stacking shaft. Because of the printing speed, the stacks have to be changed often, so that it is therefore more sensible to feed the paper stored in stacks from outside into the printer directly from a large stack arranged on a pallet. This is possible with the two printers that have been known for a long time, namely the printers IBM 3800 and Siemens ND 2, by inserting them laterally into the paper stack slot. Another smaller type of high-speed printer has come onto the market, namely the Siemens ND 3 printer, in which such insertion is not possible due to the space available and the door or floor construction. In this printer, therefore, as before, portable, that is not too heavy stacks, which can have only a few thousand sheets, must be inserted into the paper chute by an operator, which always necessitates printing interruptions, so that the performance of such a printer cannot be used optimally.

Der Erfindung liegt daher die Aufgabe zugrunde, die Reißgefahr einer zugeführten Papierbahn bei Anfahren der Druckvorrichtung zu vermeiden.The invention is therefore based on the object of avoiding the risk of tearing of a supplied paper web when the printing device is started up.

Erfindungsgemäß wird die genannte Aufgabe dadurch gelöst, daß ein schuppenartiger Führungsboden vorgesehen ist, über den die Papierbahn zuführbar ist. Derart liegt die Papierbahn auch und insbesondere dann, wenn keine Zugkräfte auf die Papierbahnen ausgeübt werden, nicht über ihre gesamte Länge auf der Bodenfläche auf, sondern nur an den erhöhten Stellen des Führungsbodens. Hierdurch wird die Reibung, insbesondere beim erneuten Anfahren der Druckeinrichtung, wesentlich vermindert, so daß Reißgefahr etc. reduziert bzw. ausgeschaltet werden.According to the invention, the stated object is achieved in that a scale-like guide base is provided, via which the paper web can be fed. In this way, and especially when no tensile forces are exerted on the paper webs, the paper web does not lie on the floor surface over its entire length, but only at the elevated points of the guide base. This considerably reduces the friction, in particular when the printing device is started again, so that the risk of tearing, etc. is reduced or eliminated.

Eine bevorzugte Ausführungsform zeichnet sich dadurch aus, daß in einem Ablegebereich zum Ablegen des bedruckten Papiers ein doppelter Boden mit einem Zwischenraum zur Durchführung der dem Drucker zuzuführenden Endlospapierbahn und mindestens einer Zuführrolle unmittelbar vor dem Zwischenraum angeordnet ist.A preferred embodiment is characterized in that a double floor with a space for carrying out the continuous paper web to be fed to the printer and at least one feed roller is arranged directly in front of the space in a storage area for storing the printed paper.

In weiterer Ausgestaltung ist vorgesehen, daß im Bereich des Zuführschachtes ein Zuführweg zum Zuführen von Papier von unterhalb des Druckers in den Zuführschacht vorgesehen ist und in den Zuführweg Leitbleche ragen, durch welche die zugeführte Papierbahn nach oben umgelenkt wird.In a further embodiment it is provided that a feed path for feeding paper from below the printer into the feed shaft is provided in the region of the feed shaft and baffles protrude into the feed path through which the fed paper web is deflected upwards.

Gemäß einer bevorzugten Ausgestaltung ist vorgesehen, daß Umlenkwalzen vorgesehen sind, von denen mindestens eine angetrieben ist. Durch diese bevorzugte Ausgestaltung erhält der am Schnelldrucker angeordnete Abzugsantrieb einen unterstützenden Antrieb im Bereich der Laufstrecke der Papierbahn, so daß bei entsprechender Abstimmung der Antriebe die Abzugskraft nur über eine kürzere Strecke aufgebracht werden muß, so daß die Papierbahn insgesamt weniger beansprucht wird. Für die angetriebene Umlenkwalze ist ein eigener Antriebsmotor vorgesehen. Mit Vorzug läuft die angetriebene Umlenkwalze kontinuierlich um, so daß sie auch dann, wenn der Drucker stillgesetzt wird, eine Abzugskraft nicht mehr ausübt, die Papierbahn noch um eine kurze Strecke fördert. Da sich aber die Papierbahn unmittelbar nach der angetriebenen Umlenkwalze aufstaut, hebt sie sich schnell von der angetriebenen Umlenkwalze ab, so daß die Haftung zwischen Papierbahn und Umlenkwalze verloren geht und letztere frei umläuft. Der kontinuierliche Antrieb der Umlenkwalze hat ferner beim Anlauf des Druckers den Vorteil, daß in dem Augenblick, in dem die Papierbahn wieder gespannt ist, die Umlenkwalze automatisch ihre unterstützende Antriebsfunktion übernimmt. Dabei wird vor allem die beim Anlauf stoßartig wirkende Abzugskraft nur auf dem zwischen dem Drucker und der angetriebenen Umlenkwalze befindlichen Abschnitt der Papierbahn übertragen, während sie durch das allmählich folgende Anlegen der Papierbahn an die Umlenkwalze, bis schließlich die erforderliche Übertragungsreibung hergestellt ist, gedämpft und nicht in die weitere Papierbahn übertragen wird. Die Auswahl von Umlenkwalzen, die mit einem Antrieb versehen sind, wird man nach Zweckmäßigkeitserwägungen treffen, wobei auch eine angetriebene Umlenkwalze im Papierstapelschacht des Druckers angeordnet sein sollte. Um die Antriebskraft von der angetriebenen Walze auf die Papierbahn besonders effektiv zu übertragen, ist gemäß einer bevorzugten Ausführungsform vorgesehen, daß der angetriebenen Walze mit geringem parallelen Abstand eine Führungswalze zugeordnet ist, und daß die Papierbahn zunächst über die angetriebene Walze und dann über die Führungswalze unter Änderung der Laufrichtung zwischen den Walzen geführt wird. Die Papierbahn wird also zwischen angetriebener Walze und Führungswalze in einer Schlinge geführt, so daß der für die Übertragung der Antriebskraft von der angetriebenen Walze auf die Papierbahn notwendige Umschlingungswinkel gewährleistet ist. Dies wird konstruktiv insbesondere dadurch verwirklicht, daß die angetriebene Walze und die Führungswalze in Laufrichtung der Papierbahn und quer dazu gegeneinander versetzt sind.According to a preferred embodiment it is provided that deflection rollers are provided, at least one of which is driven. This preferred embodiment provides the trigger drive arranged on the high-speed printer with a supporting drive in the region of the running path of the paper web, so that, with appropriate coordination of the drives, the pulling force only has to be applied over a shorter distance, so that the paper web is less stressed overall. A separate drive motor is provided for the driven deflection roller. The driven deflecting roller preferably rotates continuously, so that even when the printer is stopped, it no longer exerts a pulling force and conveys the paper web for a short distance. However, since the paper web builds up immediately after the driven deflection roller, it quickly stands out from the driven deflection roller, so that the adhesion between the paper web and the deflection roller is lost and the latter rotates freely. The continuous drive of the deflecting roller also has the advantage when the printer starts up that the moment the paper web is stretched again, the deflecting roller automatically assumes its supporting drive function. Above all, the pulling force acting abruptly at startup is only transmitted to the section of the paper web located between the printer and the driven deflection roller, while it is dampened and not by the gradual subsequent application of the paper web to the deflection roller until the required transmission friction is finally produced is transferred into the further paper web. The selection of deflection rollers, which are provided with a drive, will be made according to expediency considerations, and a driven deflection roller should also be arranged in the paper stacking shaft of the printer. In order to transmit the driving force from the driven roller to the paper web particularly effectively, it is provided according to a preferred embodiment that the driven roller with a small parallel distance is assigned a guide roller, and that the paper web first over the driven roller and then over the guide roller Change the direction of rotation between the rollers is performed. The paper web is thus guided in a loop between the driven roller and the guide roller, so that the wrap angle necessary for the transmission of the driving force from the driven roller to the paper web is ensured. This is realized constructively in particular in that the driven roller and the guide roller are offset from one another in the running direction of the paper web and transversely thereto.

Gemäß einer bevorzugten Ausgestaltung ist weiterhin vorgesehen, daß der schuppenartige Zuführboden mit in Zuführrichtung langsam ansteigenden Rampen und am Ende derselben steil abfallenden Flanken ausgebildet ist. Hierdurch wird ein Anstoßen der Bahn an Kanten der Schuppen vermieden.According to a preferred embodiment, it is further provided that the scale-like feed floor is designed with ramps slowly rising in the feed direction and steeply falling flanks at the end thereof. This prevents the web from striking the edges of the scales.

In Weiterbildung ist vorgesehen, daß bei einer von der Abzugsrichtung der Papierbahn vom Großstapel verschiedenen Einlaufrichtung in den Schnelldrucker ein Wendekreuz vorgesehen ist, das aus einer quer zur Abzugsrichtung angeordneten Einlaufwalze, einer, einen unmittelbar hinter dieser und unter einem Winkel kleiner 90 Grad gegenüber dieser angestellten Wendestab und gegebenenfalls einer weiteren, quer zur Einlaufrichtung angeordneten Auslaufwalze besteht, und daß eine der Walzen angetrieben ist.In a further development it is provided that a turning cross is provided at an entry direction into the high-speed printer which is different from the withdrawal direction of the paper web from the bulk stack and which is arranged from a direction transverse to the withdrawal direction th infeed roller, one, a directly behind this and at an angle of less than 90 degrees to this turning bar and possibly another, arranged transversely to the infeed roller, and that one of the rollers is driven.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus den Ansprüchen und aus der nachfolgenden Beschreibung, in der ein Ausführungsbeispiel der erfindungsgemäßen Vorrichtung unter Bezugnahme auf die Zeichnungen im einzelnen erläutert ist.Further advantages and features of the invention result from the claims and from the following description, in which an embodiment of the device according to the invention is explained in detail with reference to the drawings.

Dabei zeigt:

  • Fig. 1 eine schematische Darstellung der bei einem Laserdrucker angeordneten erfindungsgemä-Ben Vorrichtung, wobei die Druckeinheit selbst nicht detailliert wurde;
  • Fig. 2 eine Seitenansicht des Ablegebodens;
  • Fig. 3 Umlenkwalzen im Detail;
  • Fig. 4 eine schematische Darstellung der Anordnungsmöglichkeiten für den Großstapel;
  • Fig. 5 ein Wendekreuz; und
  • Fig. 6 eine schematische Darstellung einer weiteren Ausgestaltung von Teilen der erfindungsgemä-Ben Vorrichtung.
It shows:
  • 1 shows a schematic representation of the device according to the invention arranged in a laser printer, the printing unit itself not being detailed;
  • Fig. 2 is a side view of the shelf;
  • Fig. 3 deflection rollers in detail;
  • 4 shows a schematic illustration of the arrangement options for the large stack;
  • 5 shows a turning cross; and
  • 6 shows a schematic illustration of a further embodiment of parts of the device according to the invention.

In der Figur 1 ist der Schnelldrucker 1 mit seinem eigentlichen Papierstapelschacht 2, erkennbar, durch den einerseits die Papierbahn 3 über eine Führungsplatte oder eine Führungswalze 4 der eigentlichen Druckeinheit (nicht dargestellt) im Drucker 1 zugeführt wird. Von der Druckeinheit kommt die bedruckte Papierbahn 3' über Führungswalzen 5 und wird entsprechend der Formatfaltung der Papierbahn auf einem Stapel 6 abgelegt.1 shows the high-speed printer 1 with its actual paper stacking shaft 2, through which the paper web 3 is fed to the actual printing unit (not shown) in the printer 1 via a guide plate or a guide roller 4. The printed paper web 3 'comes from the printing unit via guide rollers 5 and is placed on a stack 6 in accordance with the format folding of the paper web.

Die Papierversorgung erfolgt von Großstapeln 7 her, die beispielsweise auf einer Normpalette angeordnet sind. Bei dem hier in Rede. stehenden Drucker 1 sind die Papierstapel mit der Palette 9 nicht seitlich des Papierstapelschachtes 2, sondern an einer Stirnseite des Druckers 1 angeordnet, so daß alle Zuführungs- und Fortführungswalzen parallele Achsenausrichtungen haben. Zum Abziehen der Papierbahn 3 von dem Großstapel 7 dient eine eigene Abzugsvorrichtung, die zunächst aus einem Gestell 10 besteht, da eine oberhalb der Stapel angeordnete Führungswalze 11, eine Abtasteinrichtung 12 und eine weitere in Abzugsrichtung hinter dem Stapel angeordnete Führungswalze 13 aufweist. Die Führungswalze 13 lenkt die Papierbahn um im wesentlichen 90 Grad nach unten ab. Die Papierbahn läuft hinter dem Stapel bis in Bodennähe und wird dort wiederum von einer Umlenkeinrichtung 14 mit Walzen im wesentlichen in die horizontale umgelenkt. Die Umlenkeinrichtung 14 weist Walzen auf, von denen eine angetrieben ist. Die Papierbahn ist S- förmig durch die Walzen geführt, so daß die angetriebene Walze mittels Reibung eine ausreichende Förderkraft auf die Bahn 3 ausüben kann, wenn diese vom Drucker 1 her unter Spannung steht; dagegen löst sich die Bahn 3 von der Walze und diese läuft frei um, wenn kein Zug auf die Bahn 3 ausgeübt wird.The paper is supplied from large stacks 7, which are arranged, for example, on a standard pallet. At the one in question here. standing printer 1, the paper stacks with the pallet 9 are not arranged on the side of the paper stack slot 2, but on one end face of the printer 1, so that all feed and continuation rollers have parallel axis orientations. To remove the paper web 3 from the large stack 7, a separate take-off device is used, which initially consists of a frame 10, since a guide roller 11 arranged above the stack has a scanning device 12 and a further guide roller 13 arranged behind the stack in the take-off direction. The guide roller 13 deflects the paper web downward by essentially 90 degrees. The paper web runs behind the stack as far as the floor and is in turn essentially redirected into the horizontal by a deflection device 14 with rollers. The deflection device 14 has rollers, one of which is driven. The paper web is S-shaped through the rollers so that the driven roller can exert a sufficient conveying force on the web 3 by means of friction when the web 1 is under tension; on the other hand, the web 3 detaches from the roller and this rotates freely if no train is exerted on the web 3.

Die Bahn 3 wird dann unter dem Drucker 1 über einen schuppenartigen Führungsboden 18 geführt, der aus mehreren hintereinander angeordneten, in Führungsrichtung der Papierbahn 3 ansteigenden Rampen und am Ende jeweils einer Rampe zum Anfang der nächstfolgenden Rampe in abfallender Flanke besteht. Durch diese Ausgestaltung des Führungsbodens wird erreicht, daß die Papierbahn 3, auch wenn kein kontinuierlich starker Zug auf sie ausgeübt wird, nur in Teilbereichen auf dem Boden aufliegt; hierdurch wird die Reibung, insbesondere beim Inbetriebgehen d.h. beim Anziehen der Papierbahn wesentlich gegenüber einer Bodenausgestaltung vermindert, bei dem aufgrund der Ebenheit eines solchen Bodens die Papierbahn über den ganzen Boden hin aufliegen würde. Die bei solch langen Abzugswegen, wie sie hier gegeben sind, oft bestehende Reißgefahr der Papierbahn, wird hierdurch im wesentlichen vermindert bzw. ausgeschlossen. Am Ende des Führungsbodens 18 und des Druckergehäuses sind zwei Umlenkwalzen 19, 20 angeordnet, über die die Papierbahn 3 an der Stirnseite 16 in das Druckergehäuse hineingeführt wird. An dieser Stelle befindet sich bei einem derartigen Drucker der Ablegebereich für die bedruckte Papierbahn, so daß hier ansich die unbedruckte Bahn 3 nicht eingeführt werden könnte. Es wurde daher der eigentliche Ablegeboden 26 höher angeordnet und so ein Zwischenraum 17' zwischen diesem und einem unteren zusätzlichlichen Boden 17 geschaffen, so daß die Bahn durch diesen Zwischenraum 17' in den Papierstapelschacht 2 eingeführt werden kann. Dort ist eine motorisch angetriebene Umlenkwalze 21 angeordnet, der eine freilaufende Umlenkwelle 22 folgt (Fig.3), so daß die Papierbahn 3 durch beide Bahnen S-förmig umgelenkt wird. Die Welle 22 dient dazu, die Papierbahn um einen möglichst weiten Bereich um die angetriebene Walze 21 herumzulenken, so daß die Antriebskräfte der Walze 21 optimal auf die Papierbahn übertragen werden können. Die angetriebene -Walze 21 besitzt zur Verbesserung der Ubertragung der Antriebskraft vorteilhafterweise einen Gummi- oder Kunststoffbelag. Hinter der Umlenkwalze 22 ist die Papierbahn 3 nach oben geführt um dann über das erwähnte Führungsblech 4 oder eine weitere Umlenkwalze 4' in die eigentliche Druckeinheit zu gelangen. Wesentlich ist, daß durch die erfindungsgemäße Ausgestaltung vermieden wird, daß die Papierbahn direkt seitlich in den Papierschacht des Druckers eingeführt wird, wobei dann der Schacht geöffnet bleiben müßte, was zu einen hohen Geräuschpegel beim Betrieb führen würde. Die in der Druckeinheit bedruckte Papierbahn 3' wird, wie schon oben angesprochen, über Führungswalzen 5 zur Ablegeeinrichtung (Fig.2) geführt, wo sie zigzagförmig entsprechend ihrer Formatfaltung auf einer Platte 26 abgelegt wird. Nach Ablegen, insbesondere bei höheren Stapeln weisen diese die Neigung auf, sich im Bereich der umgeknickten Falze aufzuwölben, so daß die einzelnen Lagen mit größerer Höhe des Stapels immer konkaver werden, in dem die Umknickränder höher stehen als die Mitte des Stapels. Dem wird zunächst entgegengearbeitet, in dem die umgeknickten Ränder der Bahn jeweils beim Ablegen zusätzlich nach gedrückt werden, also das beim Ablegen erfolgende Knicken unterstützt wird. Weiterhin weist der Ablegeboden 26 in der Mitte eine Erhöhung 27, beispielsweise Querschnitt eines gleichseitigen Dreiecks auf, so daß die ersten abgelegten Bahnen konvex gewölbt sind. Hierdurch wird auch das Ergreifen der umgeknickten Ränder durch die Niederdrückgreifer unterstützt. Der Ablegeboden 26 selbst ist mit Schlitzen 28 im Randbereich versehen, durch die die Greifer hindurchgreifen und das Ablegen der Papierbahn 3' auf dem Boden 26 unterstützen können.The web 3 is then guided under the printer 1 over a scale-like guide floor 18, which consists of a plurality of ramps arranged one behind the other, rising in the guide direction of the paper web 3, and at the end of each ramp at the beginning of the next ramp on a falling flank. This configuration of the guide bottom ensures that the paper web 3, even if no continuously strong pull is exerted on it, rests on the floor only in partial areas; as a result, the friction, in particular when starting up, that is to say when tightening the paper web, is substantially reduced in comparison with a floor design in which the paper web would lie over the entire floor due to the flatness of such a floor. The risk of tearing of the paper web, which often exists with such long take-off paths as are given here, is substantially reduced or excluded thereby. At the end of the guide base 18 and the printer housing, two deflection rollers 19, 20 are arranged, via which the paper web 3 is guided into the printer housing at the end face 16. In such a printer, the storage area for the printed paper web is located at this point, so that the unprinted web 3 could not be introduced here. The actual storage shelf 26 was therefore arranged higher, thus creating a space 17 'between it and a lower additional floor 17, so that the web can be introduced into the paper stacking shaft 2 through this space 17'. A motor-driven deflection roller 21 is arranged there, which is followed by a free-running deflection shaft 22 (FIG. 3), so that the paper web 3 is deflected in an S-shape by both webs. The shaft 22 serves to guide the paper web around the driven roller 21 as far as possible, so that the driving forces of the roller 21 can be optimally transmitted to the paper web. The driven roller 21 advantageously has a rubber or plastic covering to improve the transmission of the driving force. Behind the deflection roller 22, the paper web 3 is guided upwards in order then to get into the actual printing unit via the mentioned guide plate 4 or a further deflection roller 4 '. It is essential that the configuration according to the invention prevents the paper web from being inserted directly into the paper chute of the printer, the chute then having to remain open, which would lead to a high noise level during operation. The paper web 3 'printed in the printing unit, as already mentioned above, is guided over guide rollers 5 to the depositing device (FIG. 2), where it is placed on a plate 26 in a zigzag manner in accordance with its format folding. After stacking, especially in the case of higher stacks, these have the tendency to bulge in the area of the folded folds, so that the individual layers always become more concave as the height of the stack increases, in which the folding edges are higher than the center of the stack. The first step is to counteract this by pushing the folded edges of the web in addition each time it is put down, i.e. the one that takes place when it is put down Buckling is supported. Furthermore, the storage shelf 26 has an elevation 27 in the middle, for example a cross section of an equilateral triangle, so that the first sheets deposited are convexly curved. This also supports the gripping of the bent edges by the push-down grippers. The storage shelf 26 itself is provided with slots 28 in the edge area through which the grippers reach and can assist the depositing of the paper web 3 'on the floor 26.

Die Figur 4 zeigt weitere Möglichkeiten zur Anordnung von Großstapein 7 relativ zum Drucker 1 und dessen Ablegebereich 3.1 in schematischer Darstellung, wobei bei den Anordnungen 7.3 und 7.4 ein Wendekreuz vorzusehen ist, wie es in Figur 5 dargestellt ist. Dieses weist eine Führungswalze 37, die quer zur Einlaufrichtung der Papierbahn 3 angeordnet ist und ein Ausweichen der Papierbahn nach oben verhindert. Unmittelbar hinter der Führungswalze 37 ist in etwa gleicher Höhe ein Umlenkstab 38 in einem Winkel zur Laufrichtung angestellt. Dieser lenkt die Papierbahn, wie an den Richtungspfeilen erkennbar ist, im dargestellten Ausführungsbeispiel um 90 Grad zur Laufrichtung um. Schließlich weist das Wendekreuz 35 im Bereich des Auslaufs 39 der Papierbahn eine Auslaufwalze 40 auf, die einen motorischen Eigenantrieb aufweist. Die angetriebene Auslaufwalze 40 besitzt zur Verbesserung der Übertragung der Antriebskraft beispielsweise einen Gummi- oder Kunststoffbelag. Versetzt zur angetriebenen Auslaufwalze 40 ist eine weitere nicht angetriebene Walze derart angeordnet, daß die Papierbahn mehrfach umgelenkt wird und an der angetriebenen Auslaufwalze 40 mit einem entsprechend großen Umschlingungswinkel anliegt. Hinter der Walze 42 ist die Papierbahn 3 schließlich im wesentlichen nach oben geführt, um dann entsprechend über die Walze 20 (Figur 1) in den Drucker zu gelangen.FIG. 4 shows further possibilities for the arrangement of large stacks 7 relative to the printer 1 and its storage area 3.1 in a schematic representation, wherein a turnstile is to be provided for the arrangements 7.3 and 7.4, as shown in FIG. 5. This has a guide roller 37, which is arranged transversely to the infeed direction of the paper web 3 and prevents the paper web from escaping upwards. Immediately behind the guide roller 37, a deflecting rod 38 is positioned at an angle to the direction of travel at approximately the same height. In the exemplary embodiment shown, this deflects the paper web by 90 degrees to the running direction, as can be seen from the directional arrows. Finally, the turning cross 35 has in the area of the outlet 39 of the paper web an outlet roller 40 which has a motor-driven drive. The driven outlet roller 40 has, for example, a rubber or plastic covering to improve the transmission of the driving force. A further non-driven roller is arranged offset from the driven outlet roller 40 in such a way that the paper web is deflected several times and bears against the driven outlet roller 40 with a correspondingly large wrap angle. Finally, behind the roller 42, the paper web 3 is guided essentially upwards, in order then to get into the printer accordingly via the roller 20 (FIG. 1).

Eine weitere Ausführungsform von wesentlichen Teilen der erfindungsgemäßen Vorrichtung, ist in der Figur 6 dargestellt. Bei dieser Vorrichtung ist die Papierbahn 3 nicht unter den gesamten Drucker hindurchgeführt und von der Seite, auf der der Stapel angeordnet ist, gegenüberliegenden Seite in den Drucker eingeführt, wie dies bei der Figur 1 der Fall ist, sondern vielmehr von unten direkt in den Abzugsschacht 2 des Druckers eingeführt, wozu ein Leitblech 28 zur Umlenkung des Druckers in einen Schlitz 29 oder Zuführweg vorgesehen ist, in den die Bahn 3 über eine Welle oder Walze 19 eingeführt wird, und aus dem sie über eine Umlenkkante 30 zur Walze 21 geführt ist. Diese Ausgestaltung zeigt eine besonders einfache Einführmöglichkeit für den Fall, wenn die Bahn 3 nicht in den Zuführschacht 2 des Druckers 1 direkt von der Seite eingeführt werden kann.Another embodiment of essential parts of the device according to the invention is shown in FIG. In this device, the paper web 3 is not passed under the entire printer and is introduced into the printer from the side on which the stack is arranged, on the opposite side, as is the case in FIG. 1, but rather directly from below into the discharge shaft 2 of the printer is introduced, for which purpose a guide plate 28 is provided for deflecting the printer into a slot 29 or feed path into which the web 3 is introduced via a shaft or roller 19, and from which it is guided to the roller 21 via a deflection edge 30. This configuration shows a particularly simple insertion option in the event that the web 3 cannot be inserted directly into the feed slot 2 of the printer 1 from the side.

Claims (8)

1. Feeding device for a high performance printer, such as a laser printer, with guide and deflection rollers (11, 13, 14, 19, 20), in which the paper (3) is drawn from outside the printer as a continuous paper web folded to form a large stack (7), is guided below the printer and passed through a feed shaft (2) of the printer to the printing attachment, characterized in that a scalloped guide base (18) is provided by means of which the paper web (3) can be supplied.
2. Device, particularly according to claim 1, characterized in that in a depositing area (26) for depositing the printed paper (3') is provided a double base with an intermediate area (17') for the passage of the continuous paper web (3) to be fed to the printer and at least one feed roll (20) is positioned directly upstream of the space (1 T).
3. Device, particularly according to claim 1, characterized in that in the vicinity of the feed shaft (2) is provided a feed path (29) for feeding paper (3) from below the printer into the feed shaft (2) and into the feed path (29) project deflectors (28), which upwardly deflect the paper web (3) supplied.
4. Device according to one of the preceding claims, characterized in that guide rollers (19, 20; 21, 22; 19) are provided, whereof at least one is driven.
5. Device according to one of the preceding claims, characterized in that in the paper stacking shaft, alongside a driven roller (21) with a small parallel spacing is provided a further guide shaft (22) and that the paper web (3) is guided over the driven roller (21) and the guide shaft (22), whilst changing the running direction between the rollers.
6. Device according to claim 4, characterized in that the driven roller (21) and the guide shaft (22) are staggered in the running direction of the paper web (3) and at right angles thereto.
7. Device according to one of the preceding claims, characterized in that the scalloped feed base (18) is constructed with a slowly rising ramp in the feed direction and at the end thereof steeply falling away sides.
8. Device according to one of the preceding claims, characterized in that in the case of a feed direction into the high speed printer (1) differing from the removal direction of paper web (3) from the large stack (7), a reversing cross (35) is provided, which comprises a feed roller (37) positioned at right angles to the removal direction, a reversing bar (38) positioned directly behind the same and set at an angle smaller than 90° thereto and optionally a further discharge roller (40) at right angles to the feed direction, and in that one of the rollers is driven.
EP85112509A 1984-11-08 1985-10-03 High performance printer feeding device Expired - Lifetime EP0180769B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85112509T ATE54612T1 (en) 1984-11-08 1985-10-03 FEED DEVICE OF A HIGH PERFORMANCE PRINTER.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3440799 1984-11-08
DE19843440799 DE3440799C2 (en) 1984-11-08 1984-11-08 High performance printer
DE19853525600 DE3525600A1 (en) 1985-07-18 1985-07-18 Feed device of a high-speed printer
DE3525600 1985-07-18

Publications (3)

Publication Number Publication Date
EP0180769A2 EP0180769A2 (en) 1986-05-14
EP0180769A3 EP0180769A3 (en) 1987-12-16
EP0180769B1 true EP0180769B1 (en) 1990-07-18

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Application Number Title Priority Date Filing Date
EP85112509A Expired - Lifetime EP0180769B1 (en) 1984-11-08 1985-10-03 High performance printer feeding device

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EP (1) EP0180769B1 (en)
DE (1) DE3578731D1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09507666A (en) * 1994-01-24 1997-08-05 シーメンス ニクスドルフ インフオルマチオーンスジステーメ アクチエンゲゼルシヤフト Printing device with a friction drive for processing a strip-shaped record carrier
NL1003365C2 (en) * 1996-06-18 1997-12-19 Stork Brabant Bv Method and device for printing a traveling substrate web by means of ink jets.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4256248A (en) * 1979-11-02 1981-03-17 Acme Visible Records, Inc. Apparatus and method for feeding and collecting continuous web material
DE8137577U1 (en) * 1981-12-23 1982-05-06 Süka Süddeutsche Spezialdruckerei Hermann Jung GmbH & Co KG, 7512 Rheinstetten STACK PALLET WITH ENDLESS PAPER STACK

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EP0180769A3 (en) 1987-12-16
DE3578731D1 (en) 1990-08-23
EP0180769A2 (en) 1986-05-14

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