EP0635146A1 - Elektrofotografische druckeinrichtung zum simultanen beidseitigen bedrucken eines aufzeichnungsträgers. - Google Patents
Elektrofotografische druckeinrichtung zum simultanen beidseitigen bedrucken eines aufzeichnungsträgers.Info
- Publication number
- EP0635146A1 EP0635146A1 EP93905157A EP93905157A EP0635146A1 EP 0635146 A1 EP0635146 A1 EP 0635146A1 EP 93905157 A EP93905157 A EP 93905157A EP 93905157 A EP93905157 A EP 93905157A EP 0635146 A1 EP0635146 A1 EP 0635146A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- printing
- recording medium
- electrophotographic
- printing device
- rollers
- 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
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
- G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
- G03G15/23—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 specially adapted for copying both sides of an original or for copying on both sides of a recording or image-receiving material
- G03G15/231—Arrangements for copying on both sides of a recording or image-receiving material
- G03G15/238—Arrangements for copying on both sides of a recording or image-receiving material using more than one reusable electrographic recording member, e.g. single pass duplex copiers
-
- 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
- G03G2215/00455—Continuous web, i.e. roll
-
- 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
- G03G2215/16—Transferring device, details
- G03G2215/1676—Simultaneous toner image transfer and fixing
- G03G2215/168—Simultaneous toner image transfer and fixing at the first transfer point
- G03G2215/1685—Simultaneous toner image transfer and fixing at the first transfer point using heat
Definitions
- Electrophotographic printing device for simultaneous double-sided printing on a recording medium.
- the invention relates to an electrophotographic printing device for simultaneous double-sided printing of a record carrier according to the features of claim 1.
- An electrophotographic printing device with which a recording medium can be printed on both sides is known from WO-91/13386.
- the electrophotographic printing device described there, in particular for printing on single sheets, contains one or more
- Print modules in which the process means for carrying out the electrophotographic process are summarized constructively.
- the printing modules are designed as separate structural units for fastening in a housing of the printing device and have fitting elements for precisely fitting the printing modules in the housing.
- Each printing module contains an intermediate carrier with associated fixing elements in order to transfer a toner image generated on a photoconductor drum to a recording medium and to fix it there.
- the printing device can be expanded by a multiple arrangement of the printing modules from a single-color simplex printer to a multi-color duplex printer.
- US-A-36 94 073 describes a method for printing on both sides of a record carrier with an electrophotographic printing device, in which a toner image is transferred to a front side of the record carrier with the aid of a first photoconductor drum and with the aid a downstream second photoconductor drum a toner image on the back.
- Fixed are the toner images in several stages.
- a radiator connected downstream of the first photoconductor drum initially partially fixes the toner image so that the recording medium does not heat up too much and so that the toner image transfer on the second photoconductor drum is not impeded.
- a further partial fixation takes place via a further radiator, which is connected downstream of the second photoconductor drum.
- the actual overall fixing of the toner images is effected by a subsequent fixing station with reinforced emitters arranged on both sides of the recording medium.
- This multi-stage fixation is necessary because the toner image consisting of loose toner particles can stand out from the recording medium between the photoconductors.
- a multiple action of heat on the record carrier in the course of the printing process deforms and stresses the record carrier made of paper, which worsens the print quality and the paper handling.
- the multiple arrangement of radiators having a high power consumption requires the provision of a powerful, large-scale power supply. This affects the flexible use of the printing device.
- the object of the invention is to provide a simply constructed and trouble-prone electrophotographic printing device for simultaneous printing on both sides of a recording medium, which ensures gentle handling of the recording medium with the lowest possible energy consumption.
- Another object of the invention is to construct the printing device in such a way that it can be constructed from standard parts depending on customer-specific requirements.
- a pair of rollers is used as the guide means in the transport channel, which pair has deflecting rollers lying opposite one another and wrapped around by the respective intermediate carrier, between those of the recording medium in a transfer printing and fixing nip is passed through.
- Figure 1 is a schematic representation of an electrophotographic printing device for simultaneous printing on both sides of a record carrier with two printing systems
- FIG. 2 shows a schematic illustration of an electrophotographic printing device with two printing systems placed against one another with a common transfer printing and fixing point.
- the electrophotographic printing device shown in FIG. 1 is used for simultaneous printing on both sides of a tape-shaped recording medium, but is also suitable for printing single sheets if the paper path is designed accordingly. It contains two printing modules 10/1 and 10/2, on which the process means for printing on a record carrier are summarized.
- These process means comprise: an electric motor-driven photoconductor drum 11 with associated exposure device 12 for generating a charge image on the surface of the photoconductor drum; a developer station 13 for inking the charge image with toner; an endless belt-shaped intermediate carrier 14 for transferring a toner image formed by coloring the charge image on the photoconductor drum onto the surface of the recording medium; Fixing agents for heat and pressure fixing of the toner image on the recording medium and cleaning agents 15 for cleaning the intermediate carrier 14 and the photoconductor 11, which will be described in more detail later.
- An LED character generator is used as the exposure device 12, which extends over the entire length of the photoconductor drum 12 and which is controlled by a character generator of the device to generate the charge image on the photoconductor drum 11.
- the intermediate carrier 14 arranged for transferring the toner image to the recording carrier 21 consists of a rubber or silicone band, which is mounted on deflection rollers 16 and is referred to as a thermal transfer ribbon and which contacts the surface of the photoconductor drum 11 in the region of a transfer printing location 17.
- a motor device 18 which can be arranged, if necessary, enables the intermediate carrier 14 to be pivoted on and off against the photoconductor drum 11.
- the temperature at the transfer location 17 is set such that the toner of the toner image is in a doughy state and is transferred to the intermediate carrier 14 by adhesive force.
- the transmission can also take place electrostatically via a corresponding corona station.
- this transfer printing location 20 contains a pair of rollers comprising a deflection roller 22 with a large diameter and a counter roller 23, between which the recording medium 21 is passed. If appropriate, it may be favorable to preheat the recording medium 21 via a heating station before it enters the transfer printing station 20/1. The fixability can thereby be increased.
- the intermediate carrier 14 is then cleaned in a cleaning station 24.
- the cleaning station 24 contains a cleaning roller with an associated pressure roller.
- the cleaning roller mechanically or chemically removes toner residues from the intermediate carrier 14, which are then wiped off the cleaning roller on a correspondingly designed nonwoven element or in a cleaning bath.
- a transport and temperature stabilization unit in the transport direction of the intermediate carrier, arranged downstream of the cleaning station 24, which sets the intermediate carrier 14 to a constant temperature.
- the. Photoelectric drum 11 contain an electrically heated heating element.
- two identically constructed printing modules 10/1 and 10/2 are arranged in the printing device so that a transport channel 25 is arranged between the printing modules opens, through which the recording medium 21 is guided, specifically from a supply roller 26, which is only shown schematically here, to a receiving roller 27.
- deflection rollers 28 serve for feeding and removing the recording medium 21 in the area of the Print modules 10/1 and 10/2.
- the transfer printing takes place at the transfer point 20/1 of the printing module 10/1 with simultaneous fixing of a back toner image on the back of the printing Drawing carrier 21 and in the immediately following transfer printing point 20/2 of the second printing module 10/2 a transfer printing with simultaneous fixing of a front image on the front side of the recording carrier 21.
- a central control device which is coupled to both printing modules
- the transfer printing takes place at the transfer point 20/1 of the printing module 10/1 with simultaneous fixing of a back toner image on the back of the printing Drawing carrier 21 and in the immediately following transfer printing point 20/2 of the second printing module 10/2 a transfer printing with simultaneous fixing of a front image on the front side of the recording carrier 21.
- one of the rollers 22 and 23 of the roller pair can be additionally heated.
- the intermediate carrier 14 of the printing modules 10/1 or 10/2 that is not in use by means of the electromotive device 18 as required swing in and out.
- the deflecting roller 22 or the counter roller 23 it is also possible to design the deflecting roller 22 or the counter roller 23 so that it can be swiveled in and out.
- a possible change in the paper path can be corrected via the control arrangement for the printing modules 10/1, 10/2 or is automatically taken into account when generating images on the photoconductor drums.
- a particularly simple and paper-friendly construction of the electrophotographic printing device results from an arrangement of the printing modules 10/1 and 10/2 as shown in FIG.
- the printing modules 10/1 and 10/2 are arranged against one another in such a way that the deflection rollers 22 for the intermediate carriers 14 lie opposite one another and thus form a single transfer printing and fixing gap 29 through which the recording medium 21 is guided.
- the deflection rollers can be resiliently mounted to generate a corresponding pressing force on the recording medium 21.
- Correspondingly arranged stops ensure, if necessary, that the required fixing gap width depends on the thickness of the recording medium.
- the inactive intermediate carrier 14 of the printing modules can be pivoted away from the photoconductor drum by means of the motorized device 18.
- the deflection rollers 22 can also be designed so that they can be swiveled in and out. It is also possible to arrange paper rolls which can be swiveled in and out in front of and behind the transfer printing and fixing gap 29 and which ensure that the recording medium is pressed against the transfer printing rolls or guide the recording medium 14 securely in the gap.
- the relative information on the back side toner image, front side toner image or back side and front side of the recording medium are interchangeable relative information regarding the relative position of the toner image on the recording medium.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
- Counters In Electrophotography And Two-Sided Copying (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Combination Of More Than One Step In Electrophotography (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4212144 | 1992-04-10 | ||
DE4212144 | 1992-04-10 | ||
PCT/DE1993/000195 WO1993021566A1 (de) | 1992-04-10 | 1993-03-04 | Elektrofotografische druckeinrichtung zum simultanen beidseitigen bedrucken eines aufzeichnungsträgers |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0635146A1 true EP0635146A1 (de) | 1995-01-25 |
EP0635146B1 EP0635146B1 (de) | 1996-08-07 |
Family
ID=6456589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93905157A Expired - Lifetime EP0635146B1 (de) | 1992-04-10 | 1993-03-04 | Elektrofotografische druckeinrichtung zum simultanen beidseitigen bedrucken eines aufzeichnungsträgers |
Country Status (5)
Country | Link |
---|---|
US (1) | US5550624A (de) |
EP (1) | EP0635146B1 (de) |
JP (1) | JPH07505489A (de) |
DE (1) | DE59303381D1 (de) |
WO (1) | WO1993021566A1 (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IL113235A (en) * | 1995-04-03 | 2006-07-17 | Hewlett Packard Indigo Bv | Double sided imaging |
US6108513A (en) * | 1995-04-03 | 2000-08-22 | Indigo N.V. | Double sided imaging |
US5740510A (en) * | 1995-05-09 | 1998-04-14 | Agfa-Gevaert | Electrostatographic multicolour printing apparatus for single pass sequential duplex printing on a web-type toner receptor material |
US5765081A (en) * | 1995-05-09 | 1998-06-09 | Agfa-Gevaert | Electrostatographic multi-color printer for duplex printing on a web-type toner receptor material |
KR970028908A (ko) * | 1995-11-24 | 1997-06-24 | 엘 드 샴펠라에레 | 싱글 패스 다색 정전 사진 프린터 |
US5797077A (en) * | 1996-04-04 | 1998-08-18 | Fuji Xerox Co., Ltd. | Double-sided images forming apparatus and method using the same |
DE59702908D1 (de) * | 1996-10-17 | 2001-02-15 | Oce Printing Systems Gmbh | Modularer elektrofotografischer mehrfarben-drucker |
US5875383A (en) * | 1997-09-30 | 1999-02-23 | Xerox Corporation | Dual mode interchangeable modules cut sheet or web printing system with a single xerographic cut sheet print engine |
JPH11143333A (ja) * | 1997-11-13 | 1999-05-28 | Fuji Xerox Co Ltd | 両面画像形成装置 |
JP3317908B2 (ja) * | 1998-11-16 | 2002-08-26 | 富士通株式会社 | 両面印刷装置 |
JP3320367B2 (ja) * | 1998-12-08 | 2002-09-03 | 富士通株式会社 | 両面印刷装置および同装置の制御方法 |
US6487388B2 (en) * | 2001-01-24 | 2002-11-26 | Xerox Corporation | System and method for duplex printing |
JP2002240402A (ja) * | 2001-02-22 | 2002-08-28 | Sony Corp | 画像及び付帯情報の印刷形成装置及び方法 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3694074A (en) * | 1970-03-05 | 1972-09-26 | Robert W Huboi | Photographic printing system |
JPS5616156A (en) * | 1979-07-18 | 1981-02-16 | Ricoh Co Ltd | Illumination optical unit for copying |
JPS5723983A (en) * | 1980-07-21 | 1982-02-08 | Konishiroku Photo Ind Co Ltd | Picture forming device |
US4427285A (en) * | 1981-02-27 | 1984-01-24 | Xerox Corporation | Direct duplex printing on pre-cut copy sheets |
DE3242231A1 (de) * | 1981-11-16 | 1983-05-26 | Konishiroku Photo Industry Co., Ltd., Tokyo | Bildwiedergabevorrichtung |
DE3324996C2 (de) * | 1982-07-12 | 1994-06-23 | Canon Kk | Vorrichtung zum Wenden von Aufzeichnungsblättern |
DE3406244A1 (de) * | 1984-02-21 | 1985-08-22 | Siemens AG, 1000 Berlin und 8000 München | Laserdrucksystem fuer mehrfarben- und rueckseitendruck |
NL8402339A (nl) * | 1984-07-25 | 1986-02-17 | Oce Nederland Bv | Electrofotografische inrichting. |
JPH0229217B2 (ja) * | 1984-11-13 | 1990-06-28 | Konishiroku Photo Ind | Zokirokuhoho |
US4958187A (en) * | 1987-02-13 | 1990-09-18 | Canon Kabushiki Kaisha | Image forming apparatus for scanning both sides of an original and producing a duplex copy |
US5196893A (en) * | 1987-12-22 | 1993-03-23 | Minolta Camera Kabushiki Kaisha | Image forming method and apparatus having intermediate transfer member which is movable toward and away from a photoconductor |
US5057875A (en) * | 1989-01-27 | 1991-10-15 | Oki Electric Industry Co., Ltd. | Image forming apparatus provided with an image bearing film and a movable transfixing station |
US5012291A (en) * | 1989-05-23 | 1991-04-30 | Delphax Systems | Powder transport, fusing and imaging apparatus |
US5258809A (en) * | 1990-02-26 | 1993-11-02 | Siemens Nixdorf Informationssysteme Aktiengesellschaft | Electrophotographic printer of modular design |
EP0478820B1 (de) * | 1990-10-02 | 1996-01-03 | Siemens Nixdorf Informationssysteme Aktiengesellschaft | Druck- oder Kopiergerät für ein- oder mehrfarbigen Simplex- und Duplexdruck |
US5115277A (en) * | 1991-05-17 | 1992-05-19 | Hewlett-Packard Company | Electrostatically assisted transfer roller and method for directly transferring liquid toner to a print medium |
-
1993
- 1993-03-04 DE DE59303381T patent/DE59303381D1/de not_active Expired - Fee Related
- 1993-03-04 EP EP93905157A patent/EP0635146B1/de not_active Expired - Lifetime
- 1993-03-04 WO PCT/DE1993/000195 patent/WO1993021566A1/de active IP Right Grant
- 1993-03-04 JP JP5517893A patent/JPH07505489A/ja active Pending
- 1993-03-04 US US08/318,701 patent/US5550624A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9321566A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0635146B1 (de) | 1996-08-07 |
JPH07505489A (ja) | 1995-06-15 |
DE59303381D1 (de) | 1996-09-12 |
US5550624A (en) | 1996-08-27 |
WO1993021566A1 (de) | 1993-10-28 |
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