EP0514377A1 - Dispositif de transport de supports d'enregistrement dans des imprimantes et photocopieurs. - Google Patents

Dispositif de transport de supports d'enregistrement dans des imprimantes et photocopieurs.

Info

Publication number
EP0514377A1
EP0514377A1 EP90917560A EP90917560A EP0514377A1 EP 0514377 A1 EP0514377 A1 EP 0514377A1 EP 90917560 A EP90917560 A EP 90917560A EP 90917560 A EP90917560 A EP 90917560A EP 0514377 A1 EP0514377 A1 EP 0514377A1
Authority
EP
European Patent Office
Prior art keywords
roller
pressure roller
elements
fixing
counter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90917560A
Other languages
German (de)
English (en)
Other versions
EP0514377B1 (fr
Inventor
Rudolf Waechtler
Edmund Creutzman
Walter Kopp
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.)
Canon Production Printing Germany GmbH and Co KG
Original Assignee
Wincor Nixdorf International 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 Wincor Nixdorf International GmbH filed Critical Wincor Nixdorf International GmbH
Publication of EP0514377A1 publication Critical patent/EP0514377A1/fr
Application granted granted Critical
Publication of EP0514377B1 publication Critical patent/EP0514377B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • G03G15/20—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
    • G03G15/206—Structural details or chemical composition of the pressure elements and layers thereof
    • 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

Definitions

  • the invention relates to a device for transporting a record carrier in a printing or copying device and the use of such a device in a fixing station of a printing or copying device.
  • the recording media used can be of different thicknesses across their width, or the recording media serve as supports for credit cards to be printed, etc.
  • Non-mechanical printing devices can also be designed so that they can process recording medium webs of different widths. It is therefore necessary to design the fixing station with the rollers arranged in it in accordance with the largest recording medium width. Areas of the fusing roller or the pressure roller in the fusing station that do not come into contact with the recording medium heat up more locally than the actual contact areas with the recording medium because the recording medium extracts heat from the fusing roller in the fusing area. This leads to a heat-dependent, different diameter of the pressure roller made of elastic material. The recording medium is thereby deflected horizontally.
  • the object of the invention is therefore a device for
  • Another object of the invention is to design the device so that the recording medium can be positioned between the rollers.
  • the device is said to be particularly suitable for installation in a fixing station of an electrophotographic printing or copying device.
  • the device is therefore particularly suitable for fixing stations in electrophotographic printing and copying devices in which a toner image is thermo-pressure fixed on a recording medium.
  • the force-balancing effect can be influenced with the aid of an adjusting device. This makes it possible to control the position of the record carrier between the rollers.
  • FIG. 1 shows a schematic sectional illustration of a fixing station of an electrophotographic printing device with the transport device and arranged therein
  • Figure 2 is a schematic representation of the fuser of Figure 1 with a block diagram of a control arrangement for lateral positioning of the record carrier.
  • a printing device operating on the principle of electrophotography contains a fixing station for fixing a toner image on a recording medium in the form of an endless paper web 100.
  • the recording medium 100 is exposed to heat and pressure in the fixing station and thus a firm connection of the toner image to the recording medium is achieved.
  • the fixing station contains a fixing roller 201 with a heat radiator 202 arranged therein in the form of a halogen lamp.
  • the fixing roller 201 is mounted on a frame 203 of the printing device and is driven by a motor 204.
  • the fixing roller 201 usually consists of an aluminum tube coated with plastic.
  • a pressure roller 205 made of a steel tube encased with rubber is mounted on and can be pivoted away from the fixing roller 201.
  • the pressure roller 205 is mounted on two lateral bearing elements 206.
  • the bearing elements 206 are pivotally mounted in the frame 203 of the printing device about a fixed axis of rotation 207.
  • two cam disks 209 are arranged which can be rotated by means of an electric motor 208 (FIG. 2) and which bear against guide projections 210 (rotatable rollers) of the bearing elements 206.
  • Tension springs 211 engaging bearing elements 206 serve as return springs for the bearing elements 206 and press the bearing elements 206 against the cam disks 209 via the guide lugs 210.
  • the cam disks 209 are mounted on lever-like oscillators 212 with an axis of rotation 213 assigned to the frame 203 of the pressure device a pressure rod 214 is arranged on the pressure roller and has approximately the length of the pressure roller. It is approximately in the middle of the pressure roller, and an inner bearing piece 215 is pivotally mounted about an axis 216, which is approximately perpendicular to the longitudinal extent of the pressure roller. runs.
  • the guide rod 214 has adjustable fastening elements (adjusting screws) 217 at its ends, in which springs 218 connected to the rockers 212 are suspended.
  • the springs 218 in connection with the centrally mounted guide rod 214 form a kind of balance beam for balancing the pressure of the pressure of the pressure roller 205 to the fixing roller 201 over the length of the pressure roller.
  • adjustable stops 219 are arranged in the bearing area for the cam disks 209.
  • the motor 208 is coupled to the cam disks via a cross coupling 220. It enables the cam disks 209 to be pivoted about the axis of rotation 213 in accordance with the direction of the arrow shown in FIG attached motor 208.
  • the spring force of the springs 218 is significantly greater than the spring force of the return springs 211 on the pressure roller 205.
  • the rockers 212 are pivoted away from the stops 219.
  • the cam disks 209 press the pressure roller 205 against the fixing roller 201 according to their deflection.
  • the pressure force is essentially determined by the spring force of the springs 218 in connection with the geometric structure of the rocker 212 and the degree of deflection of the cam disks 209.
  • the pressure roller 205 when swiveling to the guide lugs 210 of the bearing element elements.
  • the pressure roller 205 is thus in the pivoted-off state and the recording medium 200 can be threaded into the fixing station.
  • the pressure roller 205 is pivoted toward the fixing roller 201 in the opposite direction.
  • the pressure roller 205 is brought into contact with the fixing roller 201 by rotating the cam disks 209 and against the spring force of the return springs 211.
  • the rockers 212 then lift off the stops 219 and the spring force of the springs 218 is increased fully effective.
  • the fixing station in the electrophotographic printing device serves to fix the toner image applied to the recording medium in a transfer printing station by heat and pressure on the recording medium 100.
  • the recording medium 100 is brought into contact with the fixing roller 201 with its toner layer side upwards via a fixing saddle 223 which can be pivoted on and off.
  • the recording medium 100 in the fixing area from the wrap angle Z and fixing gap FX has to be heated from room temperature to fixing temperature of greater than 110 ° C. It is therefore necessary, in order to achieve good print quality, to precisely guide the recording medium 100 in the fixing station.
  • the fixing roller 201 and the pressure roller 205 are therefore designed with regard to their length for the widest possible recording medium format. If a recording medium with a width that is less than the maximum possible recording medium width is fixed between the fixing roller 201 and the pressure roller 205, the pressure roller 205 heats up differently locally. The heating in the area of the recording medium is less than in the area of the pressure roller 205 which is not covered by the recording medium, since the recording medium absorbs and dissipates heat during the fixing process.
  • the positioning itself is carried out by changing the pressure force of the pressure roller 205 against the fixing roller 2Cl over its length.
  • a prerequisite for the regulation is first the detection of the actual position of the recording medium when the recording medium 100 enters the fixing station in the entrance area of the fixing saddle 223.
  • an optoelectronic sensor S is arranged there, which detects the lateral position of the recording medium 100 via its transport holes .
  • Commercially available optoelectronic scanners or mechanical scanning elements or the like can be used as sensors S.
  • the arrangement shown in FIG. 2 for the lateral positioning of the tape-shaped recording medium 100 contains a sensor S with an associated evaluation circuit AS for converting the sensor signals into position signals UD. Downstream of the evaluation circuit AS is an analog-digital converter W, which converts the position signal UD supplied by the evaluation arrangement AS into a digital signal so that it can be evaluated and processed with the aid of a microprocessor P.
  • the microprocessor P is connected to the actual controller C of the printing device via a data bus.
  • This control can, for. B. be designed in accordance with US-A-4 593 407, as a microprocessor P offers a commercially available microprocessor (z. B. microprocessor 8080 Siemens).
  • the microprocessor P is also connected to a program memory M for receiving the control program.
  • control signals supplied by the microprocessor P are amplified via an amplifier AP and fed to the control arrangement E for setting the pressure force of the pressure roller 205 on the fixing roller 201 along the fixing roller.
  • the device E contains a servomotor 224 with an eccentric disk 225 arranged thereon.
  • a servomotor any other adjustable electronic drive device is also suitable, e.g. B. a solenoid.
  • the eccentric disc 225 is connected to the guide rod 214 via a linkage 226.
  • the guide rod 214 is deflected by the linkage 226 to different degrees about the axis of rotation 216 and thus the pressure force on the bearing elements 206 of the pressure roller 205 is changed.
  • the horizontal position of the recording medium can thus be set in the fixing gap FX.
  • This setting takes place via the arrangement described for lateral positioning with the microprocessor P, which the actual positioning signals UD supplied by the sensor S with a z. B. compares target position stored in the memory M and controls the servomotor 224 as a function thereof via the amplifier AP.
  • the position of the actuator 224, the z. B. can be detected by a scanning device, the microprocessor P is also supplied for evaluation.
  • the position of the recording medium in the fixing station can be optimized via the control arrangement.
  • the aim of the regulation can be the so-called zero position of the continuous paper.
  • H. the positioning of the transport perforations of the continuous paper at a position assigned to the position above the dividing line T of the sensor surfaces of the scanner.
  • the aim of the regulation can also be to keep the record tracer if, for.
  • B. First, very narrow paper is printed and then alternating on wide paper is envisaged.
  • the control arrangement takes into account the behavior of the recording medium to be expected in the future and deflects the recording medium a predetermined time before or after the change.
  • the different behavior of the recording media and any necessary reserve can be stored as a program in the memory M of the microprocessor arrangement.
  • the transport device with counter roller and pressure roller described in connection with a fixing station of an electrophotographic printing device can also be used in other printing devices or copying devices for the transport of recording media.
  • These record carriers can be used as Single sheets or continuous paper webs.
  • compression springs 218 are used instead of the tension springs, they engage directly on the lower part of the lever-like rockers 212 in the vicinity of the cam disks 209.
  • the stop 219 which absorbs the spring force of the spring must be arranged in a corresponding position on the upper part of the rockers 212.
  • the springs 218 of the guide rod then directly engage the bearing element 206 of the pressure roller 205 if they e.g. as
  • Compression springs are formed or via pivotable lifts corresponding to the lever-like rockers 212.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Abstract

Un dispositif de transport de supports d'enregistrement (100), utile notamment dans le poste de fixage d'une imprimante ou d'un photocopieur, comprend un contre-rouleau (201) et un rouleau de serrage (205) monté de manière mobile par rapport au contre-rouleau (201), entre lesquels le support d'enregistrement (100) est transporté par friction. Une tige de guidage (214) montée à la manière d'un fléau à une certaine distance du rouleau de serrage (205), parallèlement à celui-ci, peut pivoter autour d'un axe de rotation (216) par rapport au rouleau de serrage (205). Afin de serrer le rouleau de serrage (205) contre le contre-rouleau de manière à compenser les forces exercées, selon les besoins, des éléments de ressort (218) agencés sur la tige de guidage (214) des deux côtés de l'axe de rotation sont couplés à des éléments de palier (206) du rouleau de serrage (205). La tige de guidage peut être déplacée par un servomoteur (224) afin de commander la position du support d'enregistrement (100) entre les rouleaux (201, 205).
EP90917560A 1990-02-02 1990-12-04 Dispositif de transport de supports d'enregistrement dans des imprimantes et photocopieurs Expired - Lifetime EP0514377B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP90102129 1990-02-02
EP90102129 1990-02-02

Publications (2)

Publication Number Publication Date
EP0514377A1 true EP0514377A1 (fr) 1992-11-25
EP0514377B1 EP0514377B1 (fr) 1993-09-15

Family

ID=8203583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90917560A Expired - Lifetime EP0514377B1 (fr) 1990-02-02 1990-12-04 Dispositif de transport de supports d'enregistrement dans des imprimantes et photocopieurs

Country Status (4)

Country Link
US (1) US5359181A (fr)
EP (1) EP0514377B1 (fr)
DE (1) DE59002769D1 (fr)
WO (1) WO1991011755A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4235706C2 (de) * 1992-10-22 1995-08-03 Siemens Nixdorf Inf Syst Verfahren und Vorrichtung zur schnellen Anpassung einer Wärmedruckfixiereinrichtung an einen Aufzeichnungsträger
JPH0836321A (ja) * 1994-07-21 1996-02-06 Brother Ind Ltd 定着装置
US6000595A (en) * 1997-12-17 1999-12-14 Roll Systems, Inc. Method and apparatus for pinless feeding of web to a utilization device
US7274903B2 (en) * 2004-03-25 2007-09-25 Lexmark International, Inc. Integrated fuser unit and drive system for use in an electrophotographic imaging process
DE602005024211D1 (de) * 2004-07-12 2010-12-02 Brother Ind Ltd Fixiervorrichtung und damit ausgerüstete Bilderzeugungsvorrichtung
JP4210937B2 (ja) * 2004-07-12 2009-01-21 ブラザー工業株式会社 画像形成装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2706362C3 (de) * 1977-02-15 1979-09-06 Siemens Ag, 1000 Berlin Und 8000 Muenchen Wärmeschmelzfixiereinrichtung
DE2717260C2 (de) * 1977-04-19 1986-05-07 Siemens AG, 1000 Berlin und 8000 München Wärmeschmelzfixiereinrichtung für auf einem Aufzeichnungsträger befindliche Tonerbilder
CA1112710A (fr) * 1977-12-07 1981-11-17 Willy G. Ceuppens Appareil a fusion avec fixation d'images par la chaleur
DE2951934C2 (de) * 1979-12-21 1982-08-19 Siemens AG, 1000 Berlin und 8000 München Vorrichtung für Schreibmaschinen o.dgl. zum Bestimmen der seitlichen Ränder des Aufzeichnungsträgers
US4376588A (en) * 1981-06-30 1983-03-15 International Business Machines Corporation Bi-directional serial printer with look-ahead
GB2128108B (en) * 1982-09-21 1985-12-04 Xerox Corp Applying release oil to fuser roll
US4753543A (en) * 1985-06-24 1988-06-28 Ricoh Company, Ltd. Electrostatic printing apparatus with heated adjustable pressure toner fixing rolls
JPS63272741A (ja) * 1987-04-30 1988-11-10 Hitachi Koki Co Ltd 用紙蛇行矯正制御方法
JPH0528151A (ja) * 1991-07-24 1993-02-05 Matsushita Electric Ind Co Ltd 情報処理装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9111755A1 *

Also Published As

Publication number Publication date
US5359181A (en) 1994-10-25
EP0514377B1 (fr) 1993-09-15
WO1991011755A1 (fr) 1991-08-08
DE59002769D1 (de) 1993-10-21

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