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WO1992006417A1 - Poste de thermofixage avec transport par bande - Google Patents

Poste de thermofixage avec transport par bande Download PDF

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Publication number
WO1992006417A1
WO1992006417A1 PCT/DE1991/000724 DE9100724W WO9206417A1 WO 1992006417 A1 WO1992006417 A1 WO 1992006417A1 DE 9100724 W DE9100724 W DE 9100724W WO 9206417 A1 WO9206417 A1 WO 9206417A1
Authority
WO
WIPO (PCT)
Prior art keywords
fixing
transfer
station
thermo
rollers
Prior art date
Application number
PCT/DE1991/000724
Other languages
German (de)
English (en)
Inventor
Klaus KÜMMEL
Helmut Naeser
Original Assignee
Siemens Nixdorf Informationssysteme Aktiengesellschaft
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 Siemens Nixdorf Informationssysteme Aktiengesellschaft filed Critical Siemens Nixdorf Informationssysteme Aktiengesellschaft
Priority to EP91915451A priority Critical patent/EP0551288B1/fr
Priority to DE59102290T priority patent/DE59102290D1/de
Publication of WO1992006417A1 publication Critical patent/WO1992006417A1/fr

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
    • G03G15/2064—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat combined with pressure
    • 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
    • G03G15/6582—Special processing for irreversibly adding or changing the sheet copy material characteristics or its appearance, e.g. stamping, annotation printing, punching
    • 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
    • G03G2215/20—Details of the fixing device or porcess
    • G03G2215/2003—Structural features of the fixing device
    • G03G2215/2016—Heating belt
    • 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
    • G03G2215/20—Details of the fixing device or porcess
    • G03G2215/2003—Structural features of the fixing device
    • G03G2215/2016—Heating belt
    • G03G2215/2025—Heating belt the fixing nip having a rotating belt support member opposing a pressure member
    • G03G2215/2032—Heating belt the fixing nip having a rotating belt support member opposing a pressure member the belt further entrained around additional rotating belt support members
    • 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
    • G03G2215/20—Details of the fixing device or porcess
    • G03G2215/207—Type of toner image to be fixed 
    • G03G2215/2074—Type of toner image to be fixed  colour
    • 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
    • G03G2215/20—Details of the fixing device or porcess
    • G03G2215/207—Type of toner image to be fixed 
    • G03G2215/2083—Type of toner image to be fixed  duplex
    • 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
    • G03G2215/20—Details of the fixing device or porcess
    • G03G2215/207—Type of toner image to be fixed 
    • G03G2215/209—Type of toner image to be fixed  plural types of toner image handled by the fixing device

Definitions

  • the invention relates to a thermal fusing station with tape transport and a printing or copying device with a thermal fusing station arranged therein.
  • Printing or copying devices operating on the principle of electrophotography are generally known. In these devices, a charge image is generated on an intermediate carrier, developed with toner in a developer station and the toner image is transferred to a recording medium in a transfer printing station. The toner images are fixed in a fixing station downstream of the transfer printing station by pressure and heat.
  • the fusing stations used such as z. B. in the US-PS
  • a suction table or a paper brake is usually used to check and control the path.
  • a paper brake, as z. E. is described in DE-PS 27 07 170.
  • the arrangement of such paper control devices enlarges the printing device, reduces the possible printing speed and is also complex.
  • the achievable printing speed is also limited by the construction of the fusing station itself.
  • the toner and the paper In the fusing station, the toner and the paper must be heated to the fusing temperature of 120 to 200 °. Only then is the toner sufficiently doughy that it can be bonded to the paper using pressure.
  • the recording medium In the known fixing station, the recording medium is therefore preheated and only then fed to the fixing rollers.
  • the object of the invention is therefore to provide a thermal fuser for a printing or copying machine, which is of simple construction, is suitable for fusing single sheets in simplex and duplex operation and enables a compact construction of the overall machine.
  • Another object of the invention is to design the thermal fixing station so that the required fixing pressure in the fixing roller area can be reduced.
  • the thermal fixing station is said to be particularly suitable for use in printing or copying machines with single sheet operation in duplex operation at high speed.
  • This object is achieved with a thermal fuser with the features of the first claim.
  • the use of such a thermal fuser in a printer or copier is characterized by the features of claim 12.
  • the thermal fixing station according to the invention is suitable for fixing toner images on sheet-like recording media in printing or copying machines. It essentially consists of heated fixing belts arranged on both sides of a feed channel, which wrap around the fixing rollers and are guided around an additional deflection point on the input side. The guiding of the fixing belts results in a wedge-shaped cross section of the feed channel, which narrows from a feed area on the input side to a contact area of the fixing rollers at a predeterminable feed angle. In this feed channel, the toner and the recording medium are heated to the fixing temperature and pressed onto the recording medium in the doughy state in the contact zone of the fixing stations.
  • the slow and constant heating of the toner and recording medium enables a lower fixing pressure, since the toner is doughy before it enters the contact area of the fixing rollers. This results in a gentler paper treatment with less tendency to paper curl.
  • the tapered fixing area formed by the fixing tapes enables the individual sheets to be smoothly phased into the fixing station and the individual sheets to be transported at the same process speed as in the transfer printing area. The cut sheet does not suffer recoil on the fusing rollers. The greatly reduced impact load also increases the lifespan of the fusing rollers and their mechanics.
  • the belt fixing station can connect directly to the transfer station without any space. This significantly reduces the overall structure of the device and reduces the risk of blurring the toner images.
  • the forced guidance of the record carrier between the transfer printing station and the fusing station and in the fusing station itself also reduces paper flow disturbances.
  • additional deflection elements are provided on the output side to the fixing rollers in the paper transport direction, over which the fixing belts are guided. This avoids stripping errors by deflecting the recording medium from the channel or transport direction when paper emerges from the fixing rollers.
  • thermal fuser can be used for all modes, be it duplex or simplex.
  • infrared elements are arranged between the tapes, which are particularly easy to regulate.
  • the fixing tapes can contain heating fabric or they can be heated by induction heating.
  • the entire fuser is simple in construction, easy to manufacture and low-maintenance.
  • FIG. 1 shows a schematic sectional illustration of an electrophotographic printing device with a heat-setting station with belt transport
  • FIG. 2 shows a schematic illustration of the paper flow of the device in single sheet operation
  • FIG. 3 shows a schematic sectional illustration of a heat-setting station with belt transport
  • Figure 4 is a schematic sectional view of a heat-setting station with tape transport and associated integrated stripping device for the single sheets and
  • Figure 5 is a schematic sectional view of the structure of the fixing straps.
  • An electrophotographic printing device shown schematically in FIG. 1 contains a band-shaped intermediate carrier 10 in the form of a photoconductor, which is guided in an electrically motorized manner via guide rollers 11.
  • the various units for the electrophotographic process are grouped around the intermediate carrier 10. These are essentially: a charging device LE in the form of a charging corotron for charging the intermediate carrier; a character generator ZG with a light-emitting diode comb for character-dependent exposure of the intermediate carrier; Developer stations EY, EM, EC and EB for coloring the charge-dependent discharged image on the intermediate carrier 10 using colored toner.
  • the developer station EY contains yellow toner, the developer station EM toner with the color magenta, the developer station EC toner with the color cyan and the developer station EB black toner.
  • a cleaning station RS is provided with a cleaning brush 13 integrated therein.
  • the developer stations EY, EM, EC and EB are designed to be interchangeable and can, for. B. pulled out of the device via slide guides and inserted into the device. They are constructed in the usual way and contain developer rollers 14 for coloring the charge image as well as guide rollers 11/1 to 11/4 which can be swiveled in and out for swiveling the intermediate carrier 10 onto and off the developer rollers 14 by means of electromagnetic swiveling devices 15 . B. as plunger magnets or z. B. be designed as a swing magnet. They are used to couple the developer stations EY, EM, EC and EB individually to the intermediate carrier 10, controlled by a controller of the device.
  • the transfer printing stations U1 and U2 each contain a ribbon-shaped transfer element 16, which in the exemplary embodiment shown is designed as a photoconductor ribbon.
  • the transfer elements 16 are driven by an electric motor ben and are stored on guide rollers 11.
  • the transfer printing stations have a transfer area T, which serves to transfer toner images on the intermediate carrier 10 to the transfer elements 16.
  • pivotable guide rollers 11/5 and 11/6 are provided, by means of which the intermediate carrier 10 can be pivoted in and out of the transfer elements 16 in the transfer areas T.
  • Electromotive swivel devices 15 are provided to transfer a toner image from the intermediate carrier 10 to the transfer elements 16 there is a transfer printing corotron 17 in the transfer area T opposite the guide rollers 11/5 and 11/6 Electromotive swivel devices 15 are provided.
  • the intermediate carrier 10 is brought into contact with the transfer element 16 and transferred to the transfer element 16 via the transfer printing corotron 17 with the aid of charge forces.
  • the transfer element 16 is moved in the area of the transfer areas T in synchronism with the intermediate carrier 10.
  • An additional crotron 19 is arranged downstream of the transfer area T in the direction of movement during the transfer of the transfer element. It serves to strengthen the toner image on the transfer element 16.
  • the arrangement of such an additional corotron 19 can be favorable if the printing device is used for four-color printing, in which several individual images of different colors are printed one above the other, and consequently a toner image passes through the transfer area T four times.
  • the transfer printing stations U1 and U2 have transfer printing areas UB for transferring the toner images located on the transfer elements 16 to a recording medium. These exist Weil from a guide roller 15 with a transfer printing corotron 17 arranged opposite the guide roller 15.
  • the transfer printing area UB1 of the first transfer printing station is arranged on one side of a transport channel K for printing on a front side of the recording medium and the transfer printing area UB2 of the second transfer printing station is arranged for printing on a rear side of a recording medium the other side of the transport channel K.
  • the transport channel K serves to feed the recording medium to the transfer printing areas UB1 and UB2.
  • Cleaning stations RS are provided for cleaning the transfer elements 16 after transfer printing. These are designed in accordance with the cleaning station RS of the intermediate carrier 10. They also contain a cleaning brush 13 and cleaning corotron 20 for loosening the toner before cleaning or for unloading the transfer element 16 or the intermediate carrier 10 before cleaning.
  • the transfer elements 16 and the intermediate carrier 10 are driven via electric motors M1 to MN which are arranged on the bottom of the device and are coupled to the guide rollers 11 via belt drives 21.
  • the transfer element 16 of the lower transfer station U1 is only moved in one direction (arrow direction). The direction of movement corresponds to the movement of the transfer element 16 during the transfer of a toner image.
  • the transfer element 16 of the upper transfer station U2 can be moved in both directions.
  • the transfer element 16 of the upper transfer printing station U2 is moved with the intermediate carrier 10 in the direction of the arrow.
  • Transfer of the toner images to the transfer element 16 of the upper transfer station U2 the contact of the transfer element 16 with the intermediate carrier 10 is released and the transfer element 16 of the transfer station U2 is reversed to transfer the toner image onto the record carrier (arrow direction).
  • the pivotable guide rollers 11/5 and 11/6 are therefore used for the alternative generation of a transfer position in which toner images are transferred from the intermediate carrier 10 to the transfer element 16 and a standby position in which the intermediate carrier 10 and the transfer element 16 are spaced apart from one another in such a way that no toner images are transferred.
  • the transfer printing areas UB1 and UB2 are supplied with a sheet-shaped recording carrier 22 via the transport channel K.
  • the transport channel K consists of the actual pressure channel KD and a supply channel KZ.
  • the individual sheets 22 are fed one after the other via the feed channel KZ to the pressure channel KD.
  • the mouth area is arranged in a device area delimited by transfer printing stations U1 and U2 and the intermediate carrier 10.
  • a direction deflection device for the recording medium is arranged in this mouth region.
  • the printing device is designed as a single-sheet printer, this consists of fixed stops 23 and movable stops 24 and a paper transport device PT.
  • the fixed stops 23 are fixedly arranged at the rear end of the feed channel KZ in the mouth area between the feed channel and the pressure channel. They limit the rear stop of a single sheet 22 fed via the feed channel KZ.
  • the stops 24, which can be pivoted in and out, are located in the middle of the pressure channel KD in the mouth region. The pivoting in and out is effected by means of electric motors or magnets MO.
  • the pressure channel KD is designed for the parallel transport of at least two single sheets 22/1 and 22/2 of a first format, in this case A4, arranged next to one another and for the transport of single sheets of a second format, in this case A3.
  • A4 format For the parallel transport of two single sheets in A4 format, the single sheets are fed one after the other via the storage area VB.
  • the movable stops 24 are moved centrally into the mouth area between the pressure channel KD and the supply channel KZ, so that the second single sheet 22/2 with its lateral edges for contact with the movable Attacks 24 comes.
  • the paper transport device consists of motor-driven paper transport rollers 26, which transport single sheets in the printing channel KD, and of paper transport belts 25, which are supported on rollers and which extend into the feed channel KZ: paper transport edges 25 and paper transport rollers 26 are arranged perpendicular to each other.
  • the paper conveyor belts 25 capture the single sheets 22 in the feed channel KZ and place them on the stops 23 and 24.
  • the individual sheets, which are arranged next to one another in parallel, are then transported further via the paper transport rollers 26.
  • the movable stops 24 are moved out of the transport area of the paper transport channels.
  • a fed A3 sheet thus comes into contact with the fixed stops 23 with its upper edge. It is then transported further in landscape format and printed in landscape format.
  • the orientation of the applied printed image on the single sheets can be done with the help of an electronic page turning device, which is designed in the usual way. This makes it possible to describe sheets specified in landscape format so that a single sheet described in portrait format is created.
  • Such side turning devices are generally known. If the printing device is to be operated with continuous paper, it is necessary to move the continuous paper fed via the storage area VB in the area of the directional deflection device to steer.
  • a deflecting beam 27 ( Figure 2) may be arranged.
  • This deflecting beam 27 can consist of a paper guide roller which is rotated by 45 ° with respect to the paper feed direction and which deflects the continuous paper by 90 ° and feeds it to the transfer printing areas.
  • 27 paper transport rollers can be arranged in front of and behind the deflecting bar in the direction of movement of the paper.
  • a thermal print fixing station FX is arranged to fix the toner images on the recording medium 22.
  • This can e.g. B. be designed according to the embodiments of Figures 3 or 4. It contains a pair of fixing rollers with a fixed fixing roller 28 and a z. B. under the force of a spring 29 pressing against the fixing roller 28 pressure roller 30.
  • Both pressure roller 30 and fixing roller 28 consist of an aluminum hollow roller with radiator heater 31 arranged therein in the form of a halogen heater.
  • the fixing rollers 28, 30 are arranged with respect to their linear contact zone, the actual printing area of the fixing rollers, at the end of a feed channel 32 for the recording medium, for example they have a diameter of 60 mm or preferably 80 mm.
  • the feed channel 32 extends in a straight extension to the transport channel K.
  • the feed channel 32 is formed by heat-resistant lower and upper fixing belts 31/1 and 31/2, which each wrap around the fixing roller 28 or the pressure roller 30 and a deflection point 34 on the input side.
  • This input-side deflection point 34 contains rollers which, for. B. are designed in the form of tensioning rollers with a diameter of about 30 mm and the z. B. tighten the fixing straps 33 via springs 39.
  • the deflection point 34 leads in connection with the fixing rollers 28 and the pressure rollers 30, the fixing tapes 33 such that a results in a conical feed channel 32, which decreases from a feed area 35 to the contact zone between the rollers at a predeterminable feed angle ⁇ .
  • the feed area 35 has a clear width that is somewhat thicker than the thickness of the record carrier (z. B. 1.5 mm).
  • Heating elements 36 in the form of electrically heated infrared elements, are located in the space between the forward and returning fixing bands 33. In order to enable a uniform heating of the fixing band 33, the filaments of the heating elements can be arranged offset to one another.
  • the heating elements 36 serve to heat the fixing tapes to a fixing temperature of approximately 120 to 200 °.
  • they consist, according to FIG. 5, of a multilayer elastic heat-resistant tape with a metal layer made of fabric or laminate made of nickel 37 with z.
  • B. a thickness of about 0.1-0.5 mm and a coating 38 made of toner-repellent material, for.
  • B. PTFE / silicone with a thickness of about 1.5 - 2 mm, for example.
  • Such an elastic fixing tape is suitable for fixing two-component toner.
  • To fix one-component toner it is necessary to generate an increased pressure between the fixing roller 28 and the pressure roller 30 in the contact zone. It is therefore advantageous in this case to use a steel support layer instead of the support layer of FIG. 5 (fabric) and to coat it.
  • the fixing belt itself is designed as an endless belt. This reduces the risk of breakage, e.g. B. at the weld and the risk of bead formation is reduced.
  • Such an endless belt can be produced in a simple manner by using an endless steel belt or z.
  • the fixing tape can be with respect to its support layer 37 as a laminate or fabric interspersed with resistance elements, the z. B. is designed according to an elastic electric blanket. Such a support layer can then be supplied with power via sliding contacts 40 which contact the fixing straps 33 from the inside. However, it is also possible to heat the metal mesh using induction heating.
  • the fixing rollers are usually oiled with separating oil.
  • Oiling stations 41 are provided for this purpose. According to the embodiment of FIG. 4, these can be arranged in the vicinity of the fixing rollers 28 or, in one embodiment according to FIG. 3, in the area of the fixing belts 33. In the oiling stations 41, separating oil is applied to the coated side of the fixing belts with the aid of a wick 42 or a fleece 33 applied.
  • the fixing station is covered by an insulating housing 43. It extends on both sides of the fuser station over the entire width of the fixing straps 33.
  • the thermal insulation prevents the surroundings from heating up and enables short heating times when the fusing station is switched on. Furthermore, such a housing reduces heat loss during standby operation.
  • a problem with thermal printing fusing stations is the so-called "stripping" of the single sheets when fusing.
  • Such a deflection can also occur if a toner image is arranged on both sides in duplex mode, as in the present fixing station.
  • the toner image has a different size depending on the print image generated and the single sheet can thus adhere more strongly to one or the other of the fixing rollers and thus be deflected.
  • the use of mechanical scraper elements in the exit area of the contact zone is not recommended because the toner on the single sheet is still soft after leaving the contact zone. The stripping elements can then blur the still soft toner image.
  • output-side deflection points 45 are integrated in the belt construction.
  • the fixing belts 33 are additionally guided around these deflection points 45. They have a diameter that is less than the diameter of the fixing rollers 28, for. B. 30 mm with a diameter of the fixing rollers of 60 mm or preferably 80 mm, the diameter of the deflection points 45 is dimensioned such that the single sheets detach themselves directly from the deflection point during implementation. Due to the simultaneous rectilinear guidance in the output channel 44 via the two fixing bands 33, the individual sheets cannot deform and also cannot be deflected on one side.
  • the deflection points 34 can be fastened in adjustable bearing elements 46.
  • These adjustable bearing elements 46 can be equipped with servomotors. By actuating the servomotors, the deflection points with the rollers arranged therein can be displaced perpendicular to the direction of transport of the recording medium. It is conceivable that this setting z. B. with the help of the control device of the printing device, the input of the channel angle et can be done via a control panel D with a display on the device.
  • the thermal fuser works as follows:
  • a single sheet provided with a toner image in the transfer printing station ÜB is fed via the feed area 35 to the fusing area of the thermal fusing station (position 1, FIG. 3).
  • the two fixing straps 33/1 and 33/2 gently grasp the front edge of the single sheet 22, regardless of the thickness of the single sheet (position 2). This is particularly the case
  • the tapered fixing channel 32 thus enables the individual sheets to be smoothly phased into the actual fixing area.
  • the recording medium is then continued at the same process speed VP as in the transfer printing areas UB. Due to the soft phase-in, the record carrier does not suffer any recoil on its leading edge when it enters the fusing station. This means that the paper cannot bulge.
  • recoil-free feeding with process speed VP This reduces the impact load on the edge of the record carrier and the impact load on the fixing rollers because the record carrier is fed in a wedge shape. As a result, the life of the rollers and mechanics is extended.
  • the fixing station can be arranged directly adjacent to the transfer printing area or the transfer printing station UB.
  • the fixing tapes 33 lie evenly over the front and back of the single sheet. This results in a slow, constant heating of toner and paper in the fixing area during the transport of the single sheet through the fixing area 32.
  • the toner is brought to the fixing temperature.
  • the toner is already pasty.
  • the described thermal fusing station can preferably be used in printing or copying machines with a transfer printing principle, as was described in connection with FIG. 1.
  • a fixing station of this type in conventional printing or copying devices in which a duplex operation involves two passes through the fixing station and in which the fixing station is coupled to a turning device.
  • the fixing straps 33 only have to be equipped with heating elements 36 on the fixing side.
  • the heating elements, e.g. B. the upper fixing straps 33/2 can be omitted.
  • the heating elements can therefore be designed to be switchable if necessary.
  • 11/5, 11/6 guide rollers can be swiveled in and out in the transfer area

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)

Abstract

Un poste de thermofixage avec transport par bande comporte des bandes de fixage supérieure et inférieure (31/1, 31/2) disposées des deux côtés d'un canal d'alimentation (32) et chauffées à l'aide d'un chauffage aux rayons infrarouges (36) disposé entre les bandes de fixage. Les bandes de fixage (33/1, 33/2) entourent le rouleau de fixage et le rouleau presseur et sont guidées autour d'un point de renvoi supplémentaire (34) du côté entrée. De cette façon se forme un canal d'alimentation (32) à section cunéiforme, lequel permet une introduction souple feuille à feuille dans le poste de fixage. Pour éviter des défauts de pelliculage (stripping), les bandes de fixage peuvent en outre être guidées à travers des points de renvoi (45) côté sortie.
PCT/DE1991/000724 1990-10-02 1991-09-11 Poste de thermofixage avec transport par bande WO1992006417A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP91915451A EP0551288B1 (fr) 1990-10-02 1991-09-11 Poste de thermofixage avec transport par bande
DE59102290T DE59102290D1 (en) 1990-10-02 1991-09-11 Thermo-fixierstation mit bandtransport.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4031140.6 1990-10-02
DE4031140 1990-10-02

Publications (1)

Publication Number Publication Date
WO1992006417A1 true WO1992006417A1 (fr) 1992-04-16

Family

ID=6415421

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1991/000724 WO1992006417A1 (fr) 1990-10-02 1991-09-11 Poste de thermofixage avec transport par bande

Country Status (3)

Country Link
EP (1) EP0551288B1 (fr)
DE (1) DE59102290D1 (fr)
WO (1) WO1992006417A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0488415A2 (fr) * 1990-11-30 1992-06-03 Canon Kabushiki Kaisha Mécanisme de fixage et appareil d'enregistrement à jet d'encre l'utilisant
EP0486723B1 (fr) * 1990-11-22 1994-06-08 Siemens Nixdorf Informationssysteme Aktiengesellschaft Unité de chauffage pour chauffer un support d'enregistrement dans une imprimante ou un copieur
EP0601879A2 (fr) * 1992-12-11 1994-06-15 Nec Corporation Dispositif de fusion à compensation de boucle de feuille
US5873020A (en) * 1995-11-13 1999-02-16 Minolta Co., Ltd. Fixing device with endless belt
US6130408A (en) * 1997-02-14 2000-10-10 Hitachi, Ltd. Recording apparatus with conveyed recording sheet heated by movable heater
DE10064560A1 (de) * 2000-12-22 2002-06-27 Nexpress Solutions Llc Verfahren zum doppelseitigen Bedrucken und/oder Beschichten eines Substrats
DE10064582A1 (de) * 2000-12-22 2002-07-11 Nexpress Solutions Llc Digitale Druck-oder Kopiermaschine
DE10301587A1 (de) * 2003-01-17 2004-08-05 Nexpress Solutions Llc Verfahren und Transporteinrichtung zum Vorfixieren von Toner auf einem Bedruckstoff

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Cited By (15)

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Publication number Priority date Publication date Assignee Title
EP0486723B1 (fr) * 1990-11-22 1994-06-08 Siemens Nixdorf Informationssysteme Aktiengesellschaft Unité de chauffage pour chauffer un support d'enregistrement dans une imprimante ou un copieur
US6092891A (en) * 1990-11-30 2000-07-25 Canon Kabushiki Kaisha Fixing mechanism and ink jet recording apparatus using the fixing mechanism
EP0488415A3 (en) * 1990-11-30 1992-10-28 Canon Kabushiki Kaisha Fixing mechanism and ink jet recording apparatus using the fixing mechanism
EP0488415A2 (fr) * 1990-11-30 1992-06-03 Canon Kabushiki Kaisha Mécanisme de fixage et appareil d'enregistrement à jet d'encre l'utilisant
EP0601879A2 (fr) * 1992-12-11 1994-06-15 Nec Corporation Dispositif de fusion à compensation de boucle de feuille
EP0601879A3 (fr) * 1992-12-11 1995-03-15 Nippon Electric Co Dispositif de fusion à compensation de boucle de feuille.
US5873020A (en) * 1995-11-13 1999-02-16 Minolta Co., Ltd. Fixing device with endless belt
US6130408A (en) * 1997-02-14 2000-10-10 Hitachi, Ltd. Recording apparatus with conveyed recording sheet heated by movable heater
DE19805540C2 (de) * 1997-02-14 2003-02-20 Hitachi Ltd Heizvorrichtung und diese verwendendes Aufzeichnungsgerät
DE10064560A1 (de) * 2000-12-22 2002-06-27 Nexpress Solutions Llc Verfahren zum doppelseitigen Bedrucken und/oder Beschichten eines Substrats
DE10064582A1 (de) * 2000-12-22 2002-07-11 Nexpress Solutions Llc Digitale Druck-oder Kopiermaschine
US6535711B2 (en) 2000-12-22 2003-03-18 Nexpress Solutions Llc Process for the double-sided printing and/or coating of a substrate
US6587667B2 (en) 2000-12-22 2003-07-01 Nexpress Solutions Llc Deformation device for bending a flexible substrate
DE10064582B4 (de) * 2000-12-22 2004-03-04 Nexpress Solutions Llc Digitale Druck-oder Kopiermaschine
DE10301587A1 (de) * 2003-01-17 2004-08-05 Nexpress Solutions Llc Verfahren und Transporteinrichtung zum Vorfixieren von Toner auf einem Bedruckstoff

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DE59102290D1 (en) 1994-08-25
EP0551288B1 (fr) 1994-07-20

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