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WO1997010533A1 - Guide yoke in a fixing station with low-wear deflector edge - Google Patents

Guide yoke in a fixing station with low-wear deflector edge Download PDF

Info

Publication number
WO1997010533A1
WO1997010533A1 PCT/DE1996/001589 DE9601589W WO9710533A1 WO 1997010533 A1 WO1997010533 A1 WO 1997010533A1 DE 9601589 W DE9601589 W DE 9601589W WO 9710533 A1 WO9710533 A1 WO 9710533A1
Authority
WO
WIPO (PCT)
Prior art keywords
fixing device
fixing
recording medium
saddle
edge
Prior art date
Application number
PCT/DE1996/001589
Other languages
German (de)
French (fr)
Inventor
Wilhelm-Georg Dommel
Norbert Mendisch
Josef Windele
Original Assignee
OCé PRINTING SYSTEMS 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
Application filed by OCé PRINTING SYSTEMS GMBH filed Critical OCé PRINTING SYSTEMS GMBH
Publication of WO1997010533A1 publication Critical patent/WO1997010533A1/en

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6517—Apparatus for continuous web copy material of plain paper, e.g. supply rolls; Roll holders therefor
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
    • G03G15/2017—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means
    • G03G15/2028—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means with means for handling the copy material in the fixing nip, e.g. introduction guides, stripping means
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6588—Apparatus which relate to the handling of copy material characterised by the copy material, e.g. postcards, large copies, multi-layered materials, coloured sheet material
    • G03G15/6591—Apparatus which relate to the handling of copy material characterised by the copy material, e.g. postcards, large copies, multi-layered materials, coloured sheet material characterised by the recording material, e.g. plastic material, OHP, ceramics, tiles, textiles
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00367—The feeding path segment where particular handling of the copy medium occurs, segments being adjacent and non-overlapping. Each segment is identified by the most downstream point in the segment, so that for instance the segment labelled "Fixing device" is referring to the path between the "Transfer device" and the "Fixing device"
    • G03G2215/00413—Fixing device
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00443—Copy medium
    • G03G2215/00451—Paper

Definitions

  • the invention relates to a fixing device for fixing toner images on a tape-shaped recording medium in a printing or copying device.
  • a fixing device of the type mentioned is known from DE-C2- 4235668. It contains a guide saddle with a deflection edge over which the recording medium is fed to the actual fixing area.
  • This guide saddle can serve on the one hand to heat the recording medium, and on the other hand it stabilizes the recording medium run.
  • the record carrier slides over the sliding surface of the saddle and the deflection edge.
  • the deflection edge is subject to much higher wear than the sliding surface. If the deflecting edge is worn, this leads to an inaccurate feeding of the recording medium to the subsequent fixing area, which significantly impairs the fixing quality and thus the print quality.
  • the entire guide saddle must be replaced. This is complex and causes an undesired long interruption of the printing operation or makes it necessary to readjust the entire fixing station.
  • the object of the invention is therefore to design a fixing device of the type mentioned at the outset in such a way that wear occurring in particular in the region of the deflecting edge of the guide saddle can be remedied in a very short time without changing the entire guide saddle.
  • the deflection edge is designed to be exchangeable and, at least in the area of contact with the recording medium, is made of highly wear-resistant material, there is no need to completely replace the deflection saddle in the event of wear. This avoids long interruptions in operation of the printing device. There is no need for time-consuming readjustment of the fixing station.
  • the deflection edge consists of a surface-hardened steel shaft, which is arranged in a receiving groove at the end of the guide saddle so that it can rotate.
  • the steel shaft can be rotated by simply releasing the holder, and a new, unused area can thus be brought into contact with the recording medium. The original state is thus restored without readjustment.
  • FIG. 1 shows a schematic side view of a fixing station with an unheated pivoting saddle having an exchangeable deflecting edge
  • FIG. 2 shows a plan view of the region of the exchangeable deflecting edge of the fixing station in FIG. 1,
  • FIG. 3 shows a schematic side view of a fixing station with a heated swivel saddle and an exchangeable deflecting edge
  • FIG. 4 shows a plan view of the region of the exchangeable deflecting edge of the fixing station in FIG. 3.
  • An electrographic printing device for printing tape-like recording media of different tape widths contains a heat-setting station shown in FIGS. 1 and 2.
  • the heat-setting station is designed to accommodate two recording medium webs which are guided next to one another and which are coupled via a turning device. This enables duplex printing on a continuous paper web, a front toner image being fixed in the first pass through the fixing station and, after deflection in the second parallel pass, a rear toner image being fixed on the paper web.
  • the fixing station essentially consists of a heated fixing roller 10 with a pressure roller 11 which can be pivoted on and off the fixing roller 10 and between which the recording medium 12 is guided.
  • a toner image adhering to the surface of the recording medium 12 is fixed in the known manner in the fixing gap between the rollers 10 and 11 by pressure and heat.
  • a pivotable guide saddle 13 arranged upstream of the rollers 10, 11 in the direction of the recording medium serves to feed the paper web 12 (recording medium) to the fixing gap between the rollers. Since the paper web 12 can already carry a fixed toner image on its rear side, the guide saddle 13 is unheated.
  • the paper web 13 with the toner image to be fixed is guided around the fixing roller 10 at a wrap angle for preheating.
  • the paper web 12 initially slides over a polished, optionally coated with PTFE sliding surface 14 of the steel guide saddle 13 and is deflected in the region of a deflection edge 15.
  • the guide saddle 13 is slightly bent in the outlet area, so that the paper web 12 of the deflecting edge 15 is fed straight and smoothly.
  • the deflection edge 15 in the illustrated embodiment consists of a steel shaft 16 extending over the width of the guide saddle 13 with a nitrided, hardened surface with a diameter of 10 mm.
  • Steel shaft 16 is in turn fixed in a rotationally secure manner on one of the tabs by means of a fastening screw 21. Secure against rotation because the small radius of the steel shaft also serves as a smoothing edge for the paper web 12. In the event of wear, the fastening screw 21 on the steel shaft 16 is loosened and the shaft 16 rotated by approximately 45 °. In this way, up to eight wear cycles can be used. If this is not sufficient for the life of the device, the steel shaft 16 can be easily replaced by loosening a fastening tab 20.
  • the guide saddle 13 consists of a preheating saddle with heating elements integrated therein, as is described in more detail in DE-C2-4235668.
  • a steel shaft 16 is used as a deflection edge, which is fastened in a rotationally fixed manner in a precisely fitting receiving groove 18 of the guide saddle 13 via a holder 17.
  • the paper images carrying the toner images are preheated in a known manner in simplex mode prior to the actual fixing in the fixing gap.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Textile Engineering (AREA)
  • Fixing For Electrophotography (AREA)

Abstract

A fixing device for fixing toner images on a strip substrate (12) in a printer or copier with a thermo-fixing region having a fixing roller (10, 11) and a guide yoke (13) upstream of the thermo-fixing region in the direction of travel of the substrate which can be pivoted as desired and which has a deflector edge (15) at its end facing the thermo-fixing region via which the substrate (12) is taken to the thermo-fixing region. The deflector edge (15) preferably takes the form of a hard-wearing steel shaft (16) which can be secured in rotation in a holder (17) on the guide yoke (13).

Description

Beschreibungdescription
Führungssattel in einer Fixierstation mit verschleißarmer Um- lenkkanteGuide saddle in a fixing station with low-wear deflection edge
Die Erfindung betrifft eine Fixiereinrichtung zum Fixieren von Tonerbildern auf einem bandförmigen Aufzeichnungsträger in einem Druck-oder Kopiergerät.The invention relates to a fixing device for fixing toner images on a tape-shaped recording medium in a printing or copying device.
Eine Fixiereinrichtung der genannten Art ist aus der DE-C2- 4235668 bekannt. Sie enthält einen Führungssattel mit einer Umlenkkante über die der Aufzeichnungstrager dem eigentlichen Fixierbereich zugeführt wird.A fixing device of the type mentioned is known from DE-C2- 4235668. It contains a guide saddle with a deflection edge over which the recording medium is fed to the actual fixing area.
Dieser Führungssattel kann einerseits zur Erwärmung des Λuf- zeichnungsträgers dienen, andererseits stabilisiert er den Aufzeichnungsträgerlauf . Im Druckbetrieb gleitet der Auf¬ zeichnungstrager über die Gleitfläche des Sattels und die Um¬ lenkkante. Die Umlenkkante unterliegt dabei einem wesentlich höheren Verschleiß als die Gleitfläche. Wird die Umlenkkante verschlissen, führt dies zu einer ungenauen Zuführung des Aufzeichnungsträgers zum nachfolgenden Fixierbereich, was die Fixierqualität und damit die Druckqualität wesentlich beein¬ trächtigt . Im Verschleißfall muß der gesamte Fuhrungssattel ausgewech¬ selt werden. Dies ist aufwendig und verursacht eine uner¬ wünschte lange Unterbrechung des Druckbetriebes bzw macht ei¬ ne Nachjustierung der gesamten Fixierstation erforderlich.This guide saddle can serve on the one hand to heat the recording medium, and on the other hand it stabilizes the recording medium run. In printing operation, the record carrier slides over the sliding surface of the saddle and the deflection edge. The deflection edge is subject to much higher wear than the sliding surface. If the deflecting edge is worn, this leads to an inaccurate feeding of the recording medium to the subsequent fixing area, which significantly impairs the fixing quality and thus the print quality. In the event of wear, the entire guide saddle must be replaced. This is complex and causes an undesired long interruption of the printing operation or makes it necessary to readjust the entire fixing station.
Aufgabe der Erfindung.ist es deshalb eine Fixiereinrichtung der eingangs genannten Art so auszugestalten, daß ein insbe¬ sondere im Bereich der Umlenkkante des Führungssattels auf¬ tretender Verschleiß ohne Auswechseln des gesamten Füh¬ rungsattels in kürzester Zeit behoben werden kann.The object of the invention is therefore to design a fixing device of the type mentioned at the outset in such a way that wear occurring in particular in the region of the deflecting edge of the guide saddle can be remedied in a very short time without changing the entire guide saddle.
Diese Aufgabe wird gemäß den Merkmalen des ersten Patentan¬ spruches gelöst.This object is achieved in accordance with the features of the first patent claim.
ERSATZBLÄTT(REGEL26) Vorteilhafte Ausführungsformen der Erfindung sind in den Un¬ teransprüchen gekennzeichnet.SPARE BLADE (RULE 26) Advantageous embodiments of the invention are characterized in the subclaims.
Dadurch, daß die Umlenkkante auswechselbar ausgestaltet ist und zumindest im Berührungsbereich zum Aufzeichnungsträger aus hochverschleißfestem Material besteht, entfällt im Ver¬ schleißfall ein vollständiges Auswechseln des Umlenksattels. Lange Betriebsunterbrechungen der Druckeinrichtung werden da- durch vermieden. Ein aufwendiges Nachjustieren der Fixiersta¬ tion entfällt.Because the deflection edge is designed to be exchangeable and, at least in the area of contact with the recording medium, is made of highly wear-resistant material, there is no need to completely replace the deflection saddle in the event of wear. This avoids long interruptions in operation of the printing device. There is no need for time-consuming readjustment of the fixing station.
Bei einer vorteilhaften Ausführungsform besteht die Umlenk- kante aus einer oberflächengehärteten Stahlwelle, die drehfi- xierbar in einer Aufnahmenut am Ende des Fuhrungssattells an¬ geordnet ist. Durch einfaches Lösen der Halterung kann im Verschleißfall die Stahlwelle gedreht, und so ein neuer unab¬ genutzter Bereich in Kontakt mit dem Aufzeichnungsträger ge¬ bracht werden. Der Ursprungszustand ist so ohne Nachjustieren wiederhergestellt.In an advantageous embodiment, the deflection edge consists of a surface-hardened steel shaft, which is arranged in a receiving groove at the end of the guide saddle so that it can rotate. In the event of wear, the steel shaft can be rotated by simply releasing the holder, and a new, unused area can thus be brought into contact with the recording medium. The original state is thus restored without readjustment.
Ausführungsformen der Erfindung sind in den Zeichnungen dar¬ gestellt und werden im folgenden beispielsweise näher be¬ schrieben. Es zeigenEmbodiments of the invention are shown in the drawings and are described in more detail below, for example. Show it
Figur l eine schematische Seitenansicht einer Fixierstation mit unbeheiztem, eine auswechselbare Umlenkkante auf¬ weisenden Schwenksattel,FIG. 1 shows a schematic side view of a fixing station with an unheated pivoting saddle having an exchangeable deflecting edge,
Figur 2 eine Draufsicht des Bereichs der auswechselbaren Um¬ lenkkante der Fixierstation der Figur 1,FIG. 2 shows a plan view of the region of the exchangeable deflecting edge of the fixing station in FIG. 1,
Figur 3 eine schematische Seitenansicht einer Fixierstation mit beheiztem, eine auswechselbare Umlenkkante auf- weisenden Schwenksattel und Figur 4 eine Draufsicht des Bereichs der auswechselbaren Um¬ lenkkante der Fixierstation der Figur 3.FIG. 3 shows a schematic side view of a fixing station with a heated swivel saddle and an exchangeable deflecting edge FIG. 4 shows a plan view of the region of the exchangeable deflecting edge of the fixing station in FIG. 3.
Eine elektrografische Druckeinrichtung zum Bedrucken von bandförmigen AufZeichnungsträgern unterschiedlicher Bandbrei¬ te, wie sie aus der WO 94/27193 bekannt ist, enthält eine in den Figuren l und 2 dargestellte Thermofixierstation. Die Thermofixierstation ist zur Aufnahme von zwei nebeneinander geführten Aufzeichnungsträgerbahnen ausgelegt, die über eine Wendeeinrichtung gekoppelt sind. Damit ist Duplexdruck auf einer Endlospapierbahn möglich , wobei im ersten Durchlauf durch die Fixierstation ein Frontseitentonerbild und nach Um¬ lenkung im zweiten parallelen Durchlauf ein Rückseitentoner- bild auf der Papierbahn fixiert wird.An electrographic printing device for printing tape-like recording media of different tape widths, as is known from WO 94/27193, contains a heat-setting station shown in FIGS. 1 and 2. The heat-setting station is designed to accommodate two recording medium webs which are guided next to one another and which are coupled via a turning device. This enables duplex printing on a continuous paper web, a front toner image being fixed in the first pass through the fixing station and, after deflection in the second parallel pass, a rear toner image being fixed on the paper web.
Die Fixierstation besteht im Wesentlichen aus einer beheizten Fixierwalze 10 mit einer an die Fixierwalze 10 an- und ab¬ schwenkbaren Andruckwalze 11, zwischen denen der Aufzeich¬ nungsträger 12 hindurchgeführt wird. Ein auf der Oberfläche deε Aufzeichnungsträgers 12 haftendes Tonerbild wird in be¬ kannter Weise im Fixierspalt zwischen den Walzen 10 und 11 durch Druck und Wärme fixiert. Ein in Aufzeichnungsträger¬ laufrichtung den Walzen 10, 11 vorgelagerter verschwenkbarer Führungssattel 13 dient dazu, die Papierbahn 12 (Aufzeichnungsträger) dem Fixierspalt zwischen den Walzen zu¬ zuführen. Da die Papierbahn 12 bereits auf ihrer Rückseite ein fixiertes Tonerbild tragen kann, ist der Führungssattel 13 unbeheizt. Vor dem eigentlichen Durchlauf durch den Fi¬ xierspalt wird die Papierbahn 13 mit dem zu fixierenden Tonerbild zum Vorheizen in einem Umschlingungswinkel um die Fixierwalze 10 geführt. Dabei gleitet die Papierbahn 12 zu¬ nächst über eine polierte, gegebenenfalls mit PTFE beschich¬ tete Gleitfläche 14 des aus Stahl bestehenden Führungssattels 13, und wird im Bereich einer Umlenkkante 15 umgelenkt. Aus Gründen der Umschlingungsgeometrie, und um eine exakte Füh¬ rung der Papierbahn 12 zu gewährleisten, ist der Führungssat¬ tel 13 im Auslaufbereich leicht geknickt, so daß die Papier- bahn 12 der Umlenkkante 15 geradlinig und laufberuhigt zuge¬ führt wird. Die Umlenkkante 15 besteht bei dem dargestellten Ausführungsbeispiel aus einer sich über die Breite deε Füh¬ rungssattels 13 erstreckenden Stahlwelle 16 mit nitrierter, gehärteter Oberfläche mit einem Durchmesser von 10mm. Sie ist über eine Halterung 17 auswechselbar in einer paßgenauen Auf- nahmenut 18 im Auεlaufbereich des Führungssatteis 13 angeord¬ net. Als Halterung, die die Stahlwelle 16 in der Aufnahmenut 18 lagert, dienen zwei seitliche, über Befestigungsschrauben 19 am Führungssattel 13 lösbar befestigte Laschen 20. DieThe fixing station essentially consists of a heated fixing roller 10 with a pressure roller 11 which can be pivoted on and off the fixing roller 10 and between which the recording medium 12 is guided. A toner image adhering to the surface of the recording medium 12 is fixed in the known manner in the fixing gap between the rollers 10 and 11 by pressure and heat. A pivotable guide saddle 13 arranged upstream of the rollers 10, 11 in the direction of the recording medium serves to feed the paper web 12 (recording medium) to the fixing gap between the rollers. Since the paper web 12 can already carry a fixed toner image on its rear side, the guide saddle 13 is unheated. Before the actual passage through the fixing nip, the paper web 13 with the toner image to be fixed is guided around the fixing roller 10 at a wrap angle for preheating. The paper web 12 initially slides over a polished, optionally coated with PTFE sliding surface 14 of the steel guide saddle 13 and is deflected in the region of a deflection edge 15. For reasons of the wrapping geometry and to ensure exact guidance of the paper web 12, the guide saddle 13 is slightly bent in the outlet area, so that the paper web 12 of the deflecting edge 15 is fed straight and smoothly. The deflection edge 15 in the illustrated embodiment consists of a steel shaft 16 extending over the width of the guide saddle 13 with a nitrided, hardened surface with a diameter of 10 mm. It can be exchanged via a holder 17 in a precisely fitting receiving groove 18 in the run-out area of the guide saddle 13. Two brackets 20, which are detachably fastened to the guide saddle 13 by means of fastening screws 19, serve as the holder which supports the steel shaft 16 in the receiving groove 18
Stahlwelle 16 wiederum ist über eine Befestigungsschraube 21 drehsicher auf einer der Laschen fixiert. Drehsicher deshalb, weil die Stahlwelle mit ihrem kleinen Radius auch als Glät- tungskante für die Papierbahn 12 dient. Im Verschleißfall wird die Befesigungsschraube 21 an der Stahlwelle 16 gelöst und die Welle 16 um cirka 45° gedreht.Auf diese Weise können bis zu acht Verschleißzyklen genutzt werden. Sollte diese für die Gerätelebensdauer nicht ausreichen, kann die Stahlwelle 16 durch das Lösen einer Befestigungslasche 20 leicht ausge- wechselt werden.Steel shaft 16 is in turn fixed in a rotationally secure manner on one of the tabs by means of a fastening screw 21. Secure against rotation because the small radius of the steel shaft also serves as a smoothing edge for the paper web 12. In the event of wear, the fastening screw 21 on the steel shaft 16 is loosened and the shaft 16 rotated by approximately 45 °. In this way, up to eight wear cycles can be used. If this is not sufficient for the life of the device, the steel shaft 16 can be easily replaced by loosening a fastening tab 20.
Anstelle einer Stahlwelle 16 als Umlenkkante ist auch die An¬ ordnung einer auswechselbaren Stange, einer Leiste, einer Blechschiene oder ähnlichen Umlenkmitteln mit einer hochver- schleißfesten Oberfläche denkbar. Weiterhin können anstelle einer durchgehenden Umlenkkante mehrere einzelne Umlenkkanten der beschriebenen Art nebeneinander angeordnet sein.Instead of a steel shaft 16 as a deflection edge, the arrangement of an exchangeable rod, a strip, a sheet metal rail or similar deflection means with a highly wear-resistant surface is also conceivable. Furthermore, instead of a continuous deflection edge, several individual deflection edges of the type described can be arranged next to one another.
Beim Ausführungsbeispiel der Figuren 3 und 4 besteht der Füh- rungssattel 13 aus einem Vorheizsattel mit darin integrierten Heizelementen, wie er in DE-C2-4235668 näher beschrieben ist. Auch hier kommt eine über eine Halterung 17 in einer paßge¬ nauen Aufnahmenut 18 des Führungssattels 13 drehfixierbar be¬ festigte Stahlwelle 16 als Umlenkkante zur Anwendung. Mit dem Vorheizsattel 13 wird im Simplexbetrieb die Tonerbilder tra¬ gende Papierbahn 12 vor dem eigentlichen Fixieren im Fi¬ xierspalt in bekannter Weise vorgeheizt. In the exemplary embodiment in FIGS. 3 and 4, the guide saddle 13 consists of a preheating saddle with heating elements integrated therein, as is described in more detail in DE-C2-4235668. Here, too, a steel shaft 16 is used as a deflection edge, which is fastened in a rotationally fixed manner in a precisely fitting receiving groove 18 of the guide saddle 13 via a holder 17. With the preheating saddle 13, the paper images carrying the toner images are preheated in a known manner in simplex mode prior to the actual fixing in the fixing gap.

Claims

Patentansprüche claims
1. Fixiereinrichtung zum Fixieren von Tonerbildern auf einem bandförmigen Aufzeichnungsträger (12) in einem Druck-oder Ko- piergerät mit einem Fixierwalzen (10, 11) aufweisenden1. Fixing device for fixing toner images on a tape-shaped recording medium (12) in a printing or copying machine with a fixing roller (10, 11)
Therrnofixierbereich und einem dem Therrnofixierbereich in Auf¬ zeichnungsträgerlaufrichtung vorgelagerten, bedarfsweise ver¬ schwenkbaren Führungssattel (13) , der an seinem dem Therrnofi¬ xierbereich zugewandten Ende eine Umlenkante (15) aufweist, über die der Aufzeichnungsträger (12) dem Therrnofixierbereich zugeführt wird, dadurch gekennzeichnet , daß die Umlenkkante (15) auswechselbar ausgestaltet ist und zumindest im Berührungsbe¬ reich zum Aufzeichnungsträger (12) aus hochverschleißfestem Material besteht.Thermal fixing area and a guide saddle (13), which can be swiveled upstream of the thermal fixing area in the direction of the recording medium and has a deflection edge (15) at its end facing the thermal fixing area, via which the recording medium (12) is fed to the thermal fixing area that the deflection edge (15) is designed to be exchangeable and consists of highly wear-resistant material at least in the area of contact with the recording medium (12).
2. Fixiereinrichtung nach Anspruch 1, dadurch gekenn¬ zeichnet , daß die Umlenkkante (15) aus mehreren Einzelum¬ lenkelementen zusammengesetzt ist.2. Fixing device according to claim 1, characterized gekenn¬ characterized in that the deflecting edge (15) is composed of several individual deflecting elements.
3. Fixiereinrichtung nach einem der Ansprüche 1 oder 2, da¬ durch gekennzeichnet , daß die Umlenkkante (15) min¬ destens ein zylindrisches Umlenkelement (16) aufweist, das in einer Halterung (17) des Führungssattels (13) lösbar befe- stigt ist.3. Fixing device according to one of claims 1 or 2, da¬ characterized in that the deflection edge (15) has at least a cylindrical deflection element (16) which is releasably fastened in a holder (17) of the guide saddle (13) .
4. Fixiereinrichtung nach Anspruch 3, dadurch gekenn¬ zeichnet , daß die Halterung (17) das Umlenkelement (16) um seine Längsachse dreh-und fixierbar aufnimmt.4. Fixing device according to claim 3, characterized gekenn¬ characterized in that the holder (17) receives the deflecting element (16) about its longitudinal axis rotatable and fixable.
5. Fixiereinrichtung nach einem der Ansprüche 1 bis 4, da¬ durch gekennzeichnet , daß das hochverschleißfeste Material aus Stahl mit nitrierter Oberfläche besteht.5. Fixing device according to one of claims 1 to 4, da¬ characterized in that the highly wear-resistant material consists of steel with a nitrided surface.
6. Fixiereinrichtung nach einem der Ansprüche 1 bis 5, da¬ durch gekennzeichnet , daß der Führungssattel (13) an seinem Ende eine Aufnahmenut (18) zur Aufnahme der Umlenkkan¬ te (15) aufweist.6. Fixing device according to one of claims 1 to 5, da¬ characterized in that the guide saddle (13) has at its end a receiving groove (18) for receiving the deflecting edge (15).
7. Fixiereinrichtung nach einem der Ansprüche 1 bis 6, da- durch gekennzeichnet , daß die Fixiereinrichtung zur7. Fixing device according to one of claims 1 to 6, characterized in that the fixing device for
Aufnahme von zwei nebeneinander über den Führungssattel (13) geführten Aufzeichnungsträgerbahnen ausgelegt ist.Recording of two recording medium webs guided next to one another over the guide saddle (13) is designed.
8. Fixiereinrichtung nach einem der Ansprüche 1 bis 7, da- durch gekennzeichnet , daß der Führungεsattel (13) in seinem die Umlenkkante (15) aufnehmenden Auslaufbereich eine gradflächig geführte, tangential mit der Umlenkkante (15) ab¬ schließende Gleitfläche für den Aufzeichnungsträger (12) auf¬ weist.8. Fixing device according to one of claims 1 to 7, characterized in that the guide saddle (13) in its outlet area receiving the deflection edge (15) has a straight surface tangent to the deflection edge (15) and closes sliding surface for the recording medium ( 12) has.
9. Fixiereinrichtung nach einem der Ansprüche 1 bis 8, da¬ durch gekennzeichnet , daß der Führungssattel (13) als unbeheizter, verschwenkbarer, eine Gleitfläche für den oder die Aufzeichnugsträger (12) tragender Sattel ausgebildet ist.9. Fixing device according to one of claims 1 to 8, da¬ characterized in that the guide saddle (13) is designed as an unheated, pivotable, a sliding surface for the or the record carrier (12) carrying saddle.
10. Fixiereinrichtung nach einem der Ansprüche 1 bis 8, da¬ durch gekennzeichnet , daß der Führungssattel (13) als beheizter, verschwenkbarer, eine Gleitfläche für den oder die Aufzeichnungsträger (12) tragender Vorheizsattel ausge¬ bildet ist. 10. Fixing device according to one of claims 1 to 8, da¬ characterized in that the guide saddle (13) is formed as a heated, pivotable, a sliding surface for the or the record carrier (12) bearing preheating saddle.
PCT/DE1996/001589 1995-09-12 1996-08-27 Guide yoke in a fixing station with low-wear deflector edge WO1997010533A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1995133717 DE19533717C1 (en) 1995-09-12 1995-09-12 Guide saddle in a fixing station with low-wear deflection edge
DE19533717.4 1995-09-12

Publications (1)

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WO1997010533A1 true WO1997010533A1 (en) 1997-03-20

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WO (1) WO1997010533A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009024912A1 (en) 2009-06-15 2011-02-03 OCé PRINTING SYSTEMS GMBH Apparatus and method for changing the temperature of a substrate web in a printer or copier

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936274A (en) * 1982-08-24 1984-02-28 Canon Inc Fixation device
EP0572050A2 (en) * 1989-12-13 1993-12-01 Siemens Nixdorf Informationssysteme Aktiengesellschaft Electrofotographic printing apparatus for printing on both sides of an endless paper web, comprising a thermal fixing unit
DE4235668A1 (en) * 1992-10-22 1994-04-28 Siemens Nixdorf Inf Syst Print toner fixing heater drums with smoothing edge - positioned on pre-heater saddle with adjustment of smoothing edge angle
WO1994027193A1 (en) * 1993-05-19 1994-11-24 Siemens Nixdorf Informationssysteme Aktiengesellschaft Electrographic printing device for printing recording media shaped as tapes of various widths

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936274A (en) * 1982-08-24 1984-02-28 Canon Inc Fixation device
EP0572050A2 (en) * 1989-12-13 1993-12-01 Siemens Nixdorf Informationssysteme Aktiengesellschaft Electrofotographic printing apparatus for printing on both sides of an endless paper web, comprising a thermal fixing unit
DE4235668A1 (en) * 1992-10-22 1994-04-28 Siemens Nixdorf Inf Syst Print toner fixing heater drums with smoothing edge - positioned on pre-heater saddle with adjustment of smoothing edge angle
WO1994027193A1 (en) * 1993-05-19 1994-11-24 Siemens Nixdorf Informationssysteme Aktiengesellschaft Electrographic printing device for printing recording media shaped as tapes of various widths

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Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 133 (P - 281) 20 June 1984 (1984-06-20) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009024912A1 (en) 2009-06-15 2011-02-03 OCé PRINTING SYSTEMS GMBH Apparatus and method for changing the temperature of a substrate web in a printer or copier

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