EP1141787B1 - Verfahren und einrichtung zur regelung der tonerkonzentration in einem elektrografischen prozess - Google Patents
Verfahren und einrichtung zur regelung der tonerkonzentration in einem elektrografischen prozess Download PDFInfo
- Publication number
- EP1141787B1 EP1141787B1 EP99967019A EP99967019A EP1141787B1 EP 1141787 B1 EP1141787 B1 EP 1141787B1 EP 99967019 A EP99967019 A EP 99967019A EP 99967019 A EP99967019 A EP 99967019A EP 1141787 B1 EP1141787 B1 EP 1141787B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- toner
- intermediate image
- image carrier
- recording medium
- transfer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
- G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
- G03G15/5033—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the photoconductor characteristics, e.g. temperature, or the characteristics of an image on the photoconductor
- G03G15/5041—Detecting a toner image, e.g. density, toner coverage, using a test patch
-
- 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
- G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
- G03G15/0142—Structure of complete machines
- G03G15/0178—Structure of complete machines using more than one reusable electrographic recording member, e.g. one for every monocolour image
- G03G15/0189—Structure of complete machines using more than one reusable electrographic recording member, e.g. one for every monocolour image primary transfer to an intermediate transfer belt
-
- 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
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
- G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
- G03G15/0849—Detection or control means for the developer concentration
-
- 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
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
- G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
- G03G15/0849—Detection or control means for the developer concentration
- G03G15/0855—Detection or control means for the developer concentration the concentration being measured by optical 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
- G03G15/22—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
- G03G2215/00025—Machine control, e.g. regulating different parts of the machine
- G03G2215/00029—Image density detection
- G03G2215/00059—Image density detection on intermediate image carrying member, e.g. transfer belt
Definitions
- the invention relates to a method and a device for Regulation of an electrographic printing or copying process.
- the invention particularly relates to a method and a system for regulating the toner concentration in a toner / developer mixture.
- EP 403 523 B1 describes an electrographic process where a number of process parameters are monitored and regulated, including the toner concentration in a developer station.
- a toner mark is provided to produce the mark on a photoconductor drum a reflected light sensor on the photoconductor drum and the measured value for controlling the toner supply in the developer station to use.
- the full-surface toner brand will generated on the side edge of the photoconductor drum, so that they are with respect to the web-shaped, provided with edge holes Record carrier only in the area of the marginal holes and thus not in the actual writing area of the record carrier or the photoconductor drum. Result from this a number of disadvantages:
- the toner brand can only be made relatively small, whereby the scanning area and thus also the measuring accuracy is limited, especially across the direction of transport the photoconductor drum or the recording medium.
- it is used to regulate various parameters of the electrographic process sometimes makes sense, a toner brand also in the actual writing area of the photoconductor drum apply and feel.
- a toner brand also in the actual writing area of the photoconductor drum apply and feel.
- the record carrier printed in this way can be printed with other information is no longer available.
- Edge effects e.g. of the electric field, which increases the significance a measurement in this area is weakened. ever The narrower a toner brand is, the more it overlaps such edge effects.
- a marginal hole-free recording medium can then also in from the photoconductor drum be printed on the area of the drum in which one edge perforated record carrier the edge perforation is located.
- this advantage has the disadvantage that the toner mark on the unperforated web-shaped recording medium must be reprinted in its writing area and this in turn creates waste.
- US 5,387,965 A and US 4,468,112 A are electrographic Processes known in which the toner concentration determined in a developer station and with a setpoint is compared.
- the setpoint is from a second measurement dependent, in which a toner mark is evaluated.
- those to be printed Information as an intermediate toner image on an intermediate image carrier produced with a photoconductor drum and later in a transfer printing zone from a transfer printing surface, for example from the surface of the photoconductor drum or from a transfer transfer ribbon, on a recording medium transfer.
- To control the toner density is on the electrographic Intermediate image carrier creates a toner mark that Toner mark on the intermediate image carrier at least in some areas scanned and the toner mark later from the intermediate image carrier removed again.
- the Density sampled The toner concentration is then compared with the measured value, in particular density value, in a developer station regulated so that the coloring is kept constant can be.
- the invention provides for the operation of an electrographic Printing or copying machine, in particular two operating states in front.
- the first operating state the so-called measuring cycle
- a Toner mark generated on the intermediate image carrier the density of the The toner mark is scanned and the toner mark is then removed from the intermediate image carrier away.
- the sampled toner density value is used to regulate the toner concentration in the developer station uses and finds particular influence in one Toner concentration setpoint and / or in a control threshold.
- the second operating state are to be printed Information is generated on the intermediate image carrier as a toner image and later reprinted on the record carrier.
- the The second operating state is the toner concentration in particular with the toner concentration determined from the first operating state or control threshold value controlled.
- the record carrier is in the first operating state at least temporarily from the transfer printing surface, especially from the intermediate image carrier, separated or lifted off.
- the invention is therefore suitable for the toner mark on the intermediate image carrier in an area in which the output information to be printed on the recording medium become.
- the record carrier is special web-shaped and can be made of paper, for example.
- an intermediate carrier on which the toner mark is produced in particular a photoconductor drum is provided.
- the record carrier is separated from it for at least one turn or lifted off.
- the first intermediate image carrier a photoconductor tape used and / or as a second intermediate image carrier Transfer belt. Information to be printed is shown on the generated the first intermediate image carrier, then on the Transfer ribbon and finally up from the transfer belt reprinted the record carrier.
- To determine the setpoint in the toner concentration control can in particular density values of several toner brands be used.
- the different toner brands can from several measurement cycles that are far apart in time or are formed in a coherent measuring cycle, in particular with one or more revolutions of the Photoconductor drum.
- For separating the record carrier from the transfer surface can in particular be a quickly switchable, high-precision mechanical lifting device can be used. It is in particular provided that the record carrier before Lift off and after swiveling back in relation to the transfer station both in the transport direction and transversely to the transport direction is in almost the same position.
- the record carrier moves or the transfer printing surface or the transfer printing element are moved.
- an electrophotographic to the mechanical movement Size in the area of the transfer station changed so that printing is prevented. For example, the electrical voltage at a transfer corotron can be reduced.
- the invention provides two operating states of the device created that are used alternately in time.
- the Operating state in which the toner mark is generated and evaluated and there is no transfer printing on the label, is switched in time between the other operating states, in the print information on the record carrier be reprinted.
- a particular advantage of the invention is that the toner mark can be interpreted very broad, up to the entire Width of the intermediate image carrier, e.g. a photoconductor drum.
- the toner mark in particular according to that in DE 198 01 521.6 described methods evaluated in several places become.
- the toner mark can also be placed anywhere within the print width of the intermediate image carrier. These options not only improve the measuring accuracy compared to narrow toner brands, but also the possibility created various methods for evaluating the Apply the toner mark instead of evaluating the toner density. For example, an evaluation of the shape of the generated is Toner brand possible or their comparison with a target shape. This further enables the evaluation process for color toners to optimize. Different evaluation methods can be used can be combined into an overall evaluation, e.g. color-specific different evaluation methods regarding the toner color and / or color-specific properties of the toner mark sensor be taken into account.
- the evaluation process of the toner mark can be due to the adaptability the toner brand regarding its position, Size and shape are designed to be independent from the color of the toner. This is especially true even in the case where an optoelectronic toner mark sensor works in a narrow spectrum of light wavelengths e.g. only in one color, and its light direct impact on the reflection and absorption behavior of the toner pigments Has. In this case, the shape recognition in particular a large-scale brand can be used to advantage.
- toner marks in an electrographic process only in relatively large side intervals, for example, only after a few thousand printed pages, cyclically generated and scanned.
- the toner concentration then becomes pressure intervals otherwise, i.e. based only on other measured variables.
- a different measurand can e.g. the toner concentration be the one in the developer station with a toner concentration sensor is measured. From that of the toner brand determined measured value (toner density, toner mark shape etc.) a setpoint is determined, e.g. for the toner concentration or for a control threshold and the toner concentration regulated with it. This, in between the toner mark measurements lying interval intervals applicable toner concentration control in a developer station done in a known manner.
- the toner supply is regulated otherwise.
- the object is achieved in the intervals between the formation and measurement of the toner mark a largely independent regulation of the toner coloring perform in an electrophotographic process to be able to.
- FIG. 1 schematically shows a printing device 1 for web-shaped recording media which works on the principle of electrophotography.
- the web-shaped recording medium in the form of a paper web 2 is fed by a drive unit 3 with a motor-driven friction roller 19 in the direction A 1 to a photoconductor drum 4.
- the unit additionally contains movable swivel elements 15 with which the paper web 2 can be pressed onto the surface of the photoconductor drum or can be lifted off the latter. For this purpose, they can be moved automatically with an electrical actuator 20, for example a stepping motor or lifting magnet.
- Suitable swivel elements are known in the form of transfer printing rockers, for example from WO 97/17635 A1.
- they can be designed like the rockers 40 and 44 shown in FIG. 5 of the WO publication, and be pivotably mounted on axes in such a way that the paper web can be pivoted in and out length-neutral with respect to parts of the drive unit which are further away.
- the content of WO 97/17635 A1 is hereby also incorporated into the present description by reference.
- the paper web 2 is printed in a transfer printing zone 5.
- the photoconductor drum 4 which is driven by a motor, is acted upon by various, coupled units with an intermediate toner image which is printed on the paper web 2 in the transfer printing zone 5.
- a first unit is a character generator 6, which contains a light emitting diode comb with individually controllable light elements and which can be constructed, for example, in accordance with WO 96/3782 A1.
- the character generator 6 can be regulated in its light intensity by varying the control voltage or the control current.
- An electronic controller controls the individual light emitting diodes in accordance with the image information to be printed. on.
- a charging sensor 7 adjoins the exposure station, which measures the surface potential on the photoconductor drum 4 and emits a signal as a function thereof.
- the image (charge image) generated on the photoconductor 4 depending on the character using the character generator 6 is colored using a developer station 8.
- the developer station 8 contains a toner reservoir 9 for receiving toner and a metering device 10 in the form of a metering roller. Depending on the toner consumption, the metering roller 10 supplies toner to a mixing chamber 11. In the mixing chamber 11 there is a toner / developer mixture of ferromagnetic carrier particles and toner particles. The toner mixture is fed to a developer roller 12.
- the developer roller 12 acts as a so-called magnetic brush roller and consists of a hollow roller with magnetic strips arranged therein.
- the developer roller 12 transports the developer mixture to a development nip 13 between the photoconductor drum 4 and the developer roller 12. Excess developer mixture is transported back into the mixing chamber 11 via the developer roller 12.
- the toner mark sensor 14 is an optoelectronic scanner, which can be designed, for example, as a reflection light barrier. It consists of a light source and a photo transistor as a receiver.
- the output signal of the phototransistor depends on the degree of reflection of the information applied to the photoconductor drum 4 and colored by the developer station.
- the sensor is used in particular to scan a toner mark which is used to determine the color saturation, ie the applied optical density of the toner mark.
- the wavelength of the reflection light barrier is chosen so that the scanning light has no influence on the function of the photoconductor drum 4.
- the toner mark is activated automatically when a test routine is called up started regularly, for example after 2000 printed pages.
- the then generated toner mark is scanned and that Test samples for example with regard to color density and / or color saturation evaluated.
- the toner mark is the paper web 2 from the photoconductor drum 4 pivoted so that the surface 4a in the transfer printing zone 5 does not touch the photoconductor drum 4.
- the drive unit 3 or the paper web 2 pressing against the photoconductor drum 4 Pressure elements 15 are then from the photoconductor drum 4 swung away.
- the Cleaning station 16 is constructed and contains in a conventional manner e.g. a scraper element 17 which contains the excess toner or strips the carrier particles from the photoconductor drum 4.
- the cleaning process is supported by a Corona device 18.
- Corona devices are provided in a manner known per se. This includes, for example, a charging corotron that is between the cleaning device 16 and the character generator 6 are provided is. Also exposure devices used for discharge serve the photoconductor drum 4 can be arranged in the device his. More details on the electrophotographic process and the associated facilities are, for example described in EP 403 523 B1.
- FIG 2 is a device control 25 of the electrographic Printer shown with all electronic components of the various units of the device is connected so that the processes can be coordinated with each other.
- the device control 25 is connected on the one hand to a controller 26, in the print data to be printed and in points the LEDs of the character generator 6 converts controllable signals. These signals are sent to the controller 27 of the character generator transfer.
- the device control 25 connected to a controller 28, the electrophotographic Controls parameters such as the voltages of Corotron wires.
- the toner mark sensor 14 scanning the photoconductor drum 4 has electronic components 29, which are also connected to the Device control 25 are connected.
- the controller 30 of the Developer station 8 exchanges data with the device control on two sides 25 out.
- the toner concentration sensor 21, which the concentration in the mixing chamber 11 of the developer station 8 of the toner in the toner / developer mixture has one electronic assembly 31, which also with the device control 25 is connected.
- the device control 25 is still electronic Controller 32 of the drive unit 3 connected.
- the Controller 32 controls in particular components 33 of the stepper motor which moves the paper web 2 and the electronic Components 34, the stepper motor 20 or one corresponding solenoids for the pressure elements 15 activated.
- the different pressure elements 15 also with their own stepper motors or solenoids be equipped to create an individual proof of the swingarms.
- the Device control 25 connected to electronics 35, which the delivery of toner from an external toner reservoir in the developer station does. Inside the developer station can be provided further electronics that the Dosage of the toner from the toner reservoir 9 in the Mixing chamber 11 controls by means of the metering roller 10.
- step S1 the sequence of printing and the toner concentration control described in more detail.
- step S1 it is checked whether print data is available are. If this is not the case, the pressure device switches to one Stand-by state, in which different aggregates like that Photoconductor drum, transfer printing corotrone, the transport unit etc. are set for low energy consumption.
- step S3 the electrophotographic relevant units and in step S4 the transport unit 3.
- the servomotor 20 is activated, through which the paper web 2 to the surface of the photoconductor drum 4 is pivoted.
- the drive motor activated, which the friction transport roller 19 to Transport of the paper web is started.
- the toner image thus re-printed becomes one Fixing device fixed on the recording medium 2.
- Toner concentration in the developer station 8 by means of a toner concentration control controlled.
- the toner concentration in the developer station is permanent 8 recorded and with appropriate follow-up funding the conveyor 10 a constant toner developer mixture maintained in the mixing chamber 11.
- Control 10 amount of toner delivered per unit of time, by the re-printed, set pixels in the controller 26 can be counted and / or others, the toner consumption determining sizes, e.g. the contrast setting of the image, the temperature of the photoconductor drum or the like to determine the amount of toner delivered.
- the normal printing process interrupted and a review of the current development conditions performed on a toner mark. This will first the paper web 2 in the transfer printing zone 5 by means of the Pressure elements 15 from the surface of the photoconductor drum 4 pivoted. The paper transport is also stopped.
- step 59 the value of the page counter is stored in a memory the printer controller 25 filed.
- Steps S12 to S17 describe a second operating state, where a toner mark is written on the photoconductor 4 and is evaluated to modify the toner delivery regulation, which during the transfer printing phase (S5) in normal printing.
- step S12 one or more toner marks are successively written on the photoconductor drum 4.
- the toner brands can be generated during one revolution of the photoconductor drum or alternatively several toner marks over several cycles the photoconductor drum 4.
- the toner marks are so wide that they get into the writing area of the photoconductor drum, in which in normal printing operation (step S5) printing information are usually spent on the paper web 2 can be reprinted. If necessary, the toner brand can even extend over the entire width of the photoconductor drum 4.
- Toner marks generated in this way on the photoconductor drum 4 or the marks are scanned with the sensor 14 in step S13 and evaluated in the controller 25.
- the evaluation can with regard the toner density generated and / or in terms of Form of the toner mark took place.
- the toner mark or the toner marks different densities shapes and / or dimensions exhibit.
- a value is then derived from the values, the compared with a control threshold value RS in step S14 becomes.
- the toner density value OD of the toner marks lies in the interval [RS- ⁇ , ..., RS + ⁇ ], the operating mode can in step S17 of the toner mark printing are canceled and normal Printing mode can be switched back.
- step S15 a toner delivery becomes in step S15 initiated and a further toner mark generated according to step S12.
- This process (steps S12 to S15) is repeated until until the coloration OD of the toner mark in the required Interval lies.
- a correction value is determined with which the regulation of the toner concentration in the normal printing phase (steps S S5 to S8) is adjusted. In particular, there is a control threshold changed for the toner concentration.
- the toner concentration control in the printing intervals that lie between the adjustment operating states in which toner marks can be formed and evaluated for example according to those described in US 4,468,112 A or US 5,387,965 A. Procedure. Their content is hereby incorporated by reference into the present description.
- the measured Toner density and the target toner density becomes a difference formed and the difference value to determine a new toner concentration setpoint or a threshold used for toner concentration control.
- step S12 also the per unit time in Amount of toner conveyed to the developer station can be adjusted.
- the regulation of toner delivery during the normal printing process can also use other sizes for more precise control like the sum of the set (i.e. black pixel), the temperature the photoconductor drum or the set image contrast be taken into account.
- FIG. 1 Another printing device is described in FIG that in a first printing unit 150 by a first character generator 124 at least one latent image on a photoconductor tape 122 is generated.
- a first character generator 124 With a variety of developer stations 126a, 126b, ... 126e, the toners of different colors are included on the photoconductor belt 122 in the direction of movement B creates one or more intermediate toner images.
- This tape is a temporary image and is therefore referred to as an intermediate image carrier.
- Corresponding are generated by a second character generator 138 and from multiple developer stations 140a to 140 in a second Printing unit 152 on a second photoconductor belt 136 in the direction of movement D latent images and intermediate toner images of various Colors created.
- This pressure device is in the German Patent application DE 198 561 45.8 of the applicant (internal Sign 981101DE) described in more detail.
- the intermediate toner images are at a first transfer location 128 from the first photoconductor band 122 to a first one, in Transfer transfer belt 130 running in direction C and accordingly at a third transfer location 142 from the second photoconductor belt 136 on a second transfer belt 144, which is in Moved towards E.
- the transfer ribbons 130, 132 each collect the intermediate toner images of the different color separations and then print the full-color image at a second transfer station 132 or a fourth transfer printing station 146 the web-shaped recording medium 114 on both sides, that is to say duplex around.
- the one driven by friction with transport rollers 116 Record carrier 114 then runs in the transport direction A a fixing station 118 for fixing the two Toner images and is then placed in a cooling device 120 cooled.
- This device is also used in accordance with that in FIGS 3 described embodiments with the present Invention performed an operating condition in which a toner mark from the character generators 124 and 138 and at least one of the developer stations 126a to 126e or 140a to 140e generated on at least one photoconductor 122, 136 becomes.
- the toner mark is then placed on one of the transfer belts 130, 144 reprinted on this by one of the optoelectronic Sensors 154, 156 scanned and from the transfer belt removed without being printed on the paper web 114.
- the two transfer belts 130 and 144 from the paper web 114 can be lifted off in the area of transfer printing stations 132 and 146, so that the transfer printing onto the paper 114 can be prevented.
- the toner mark can also on the photoconductor tapes 122, 136 can be scanned by corresponding sensors. Then either the transfer printing onto the surfaces 130a, 144a becomes the transfer ribbon 130, 144 or the transfer printing onto the paper web 114 prevented.
- the transfer belts 130, 144 off the paper web 114 and / or the transfer ribbons 130, 144 from the photoconductor ribbons 122, 136 are correspondingly fast switching means in Area of the transfer printing zones 132, 146 and / or 128, 142 provided.
- the coloring especially only through the toner concentration control determined, with at least one of their control variables, e.g. the control threshold of the toner concentration by which first operating state, namely the generation of the toner mark be determined.
- This variant of the invention is therefore also to be regarded as a toner brand-guided toner concentration control.
- the invention can also be used in a single sheet device become.
- the prevention of transfer printing in the operating state, in which a toner mark is formed and evaluated can be e.g. be done in such a way that the feed a sheet-shaped recording medium to the transfer station is completely prevented.
Abstract
Description
- Figur 1
- eine schematische Schnittdarstellung einer elektrofotografischen Druckeinrichtung,
- Figur 2
- elektronische Komponenten der Druckeinrichtung,
- Figur 3
- ein Ablaufdiagramm zum Drucken und Erzeugen einer Tonermarke und
- Figur 4
- eine zweite elektrografische Druckeinrichtung.
- 1
- Druckgerät
- 2
- Aufzeichnungsträger (Papierbahn)
- 3
- Antriebsaggregat
- 4
- Fotoleitertrommel
- 4a
- Oberfläche der Fotoleitertrommel
- 5
- Umdruckzone
- 6
- Zeichengenerator
- 7
- Ladesensor
- 8
- Entwicklerstation
- 9
- Tonervorratsbehälter
- 10
- Dosiervorrichtung
- 11
- Mischkammer
- 12
- Entwicklerwalze
- 13
- Entwicklerspalt
- 14
- Tonermarkensensor
- 15
- Andruckelement
- 16
- Reinigungseinrichtung
- 17
- Abstreifelement
- 18
- Coronaeinrichtung
- 19
- Antriebswalze
- 20
- Anschwenk-Stellmotor
- 21
- Tonerkonzentratios-Sensor
- 25
- Gerätesteuerung
- 26
- Controller
- 27
- ZG-Steuerung
- 28
- Elektrofotografie-Steuerung
- 29
- Elektronik des Tonermarkensensors
- 30
- Steuerung der E-Station
- 31
- Elektronik von 21
- 32
- Elektronik von 3
- 33
- Elektronik des Motors
- 34
- Elektronik der Stellglieder
- 35
- Elektronik für Tonerförderung
- 114
- Papierbahn
- 116
- Antriebsrolle
- 118
- Fixierstation
- 120
- Kühleinrichtung
- 122
- erstes Fotoleiterband
- 124
- erster Zeichengenerator
- 126a..126e
- Entwicklerstationen
- 128
- erste Umdruckstelle
- 130
- erstes Transferband
- 130a
- Oberfläche des ersten Transferbands
- 132
- zweite Umdruckstelle
- 136
- zweites Fotoleiterband
- 138
- zweiter Zeichengenerator
- 140a..140e
- Entwicklerstationen
- 142
- dritte Umdruckstelle
- 144
- zweites Transferband
- 144a
- Oberfläche des zweiten Transferbands
- 146
- vierte Umdruckstelle
- 150
- erstes Druckwerk
- 152
- zweites Druckwerk
- 154
- Tonermarkensensor
- 156
- Tonermarkensensor
- A,A1
- Papiertransportrichtung
- B
- Bewegungsrichtung des ersten Fotoleiterbandes
- B1
- Drehrichtung der Fotoleitertrommel
- C
- Bewegungsrichtung des ersten Transferbandes
- D
- Bewegungsrichtung des zweiten Fotoleiterbandes
- C
- Bewegungsrichtung des zweiten Transferbandes
Claims (16)
- Verfahren zur Regelung eines elektrografischen Druck- oder Kopierprozesses, bei dem zu druckende Informationen als Tonerzwischenbild auf einem Zwischenbildträger (4, 122, 130, 136, 144) erzeugt werden und später in einer Umdruckzone (5, 132, 146) von einer Umdruck-Oberfläche (130, 144), auf einen Aufzeichnungsträger (2, 114) übertragen werden, wobeiauf einem insbesondere elektrografischen Zwischenbildträger (4, 130, 144) eine Tonermarke erzeugt wird,die Tonermarke auf dem Zwischenbildträger (4, 122, 136) zumindest bereichsweise abgetastet wird und die Tonermarke anschließend vom Zwischenbildträger (4, 122, 136) wieder entfernt wird,mit dem gemessenen Wert, insbesondere Dichtewert, die Tonerkonzentration in einer Entwicklerstation (8) geregelt wird und wobeider Übertrag des Tonerzwischenbilds von der Umdruck-Oberfläche (4a, 130a, 144a) auf den Aufzeichnungsträger (2, 114) im Zeitraum zwischen der Erzeugung und der Entfernung der Tonermarke zumindest zeitweise verhindert wird.
- Verfahren nach Anspruch 1, wobei die Verhinderung durch Abheben des Aufzeichnungsträgers (2, 114) von der Umdruck-Oberfläche (4a, 130a, 144a) erfolgt.
- Verfahren nach Anspruch 1 oder 2, wobei die Verhinderung des Umdrucks während des Zeitraums bewirkt wird, in dem die Tonermarke die Umdruckzone (5, 128, 132, 142, 146) passiert.
- Verfahren nach einem der Ansprüche 1 bis 3, wobei die Tonermarke auf dem Zwischenbildträger (4, 122, 136, 130, 144) in einem Bereich erzeugt wird, in welchem auch die auf den Aufzeichnungsträger (2, 114) zu druckenden Informationen ausgegeben werden.
- Verfahren nach einem der vorhergehenden Ansprüche, wobei der Aufzeichnungsträger (2, 114) bahnförmig und insbesondere aus Papier ist.
- Verfahren nach einem der vorhergehenden Ansprüche, wobei als Zwischenbildträger eine Fotoleitertrommel (4) verwendet wird und als Umdruck-Oberfläche die Oberfläche der Fotoleitertrommel (4).
- Verfahren nach Anspruch 6 wobei der Aufzeichnungsträger für eine Umdrehung der Fotoleitertrommel (4) von ihrer Umdruck-Oberfläche abgehoben wird.
- Verfahren nach einem der Ansprüche 1 bis 5, wobei als erster Zwischenbildträger ein Fotoleiterband (122, 136) oder eine Fotoleitertrommel (4) verwendet wird und als zweiter Zwischenbildträger ein Transferband (130, 144), wobei die zu druckenden Information auf dem ersten Zwischenbildträger (122, 136) erzeugt werden und anschließend auf das Transferband (130, 144) übertragen werden und wobei als Umdruck-Oberfläche die Oberfläche des Transferbandes (130, 144) verwendet wird.
- Verfahren nach Anspruch 8, wobei die Abtastung der Tonermarke auf dem Transferband (130, 144) erfolgt.
- Verfahren zum Betreiben eines elektrografischen Druckoder Kopiergerätes mit einem Zwischenbildträger (4, 122, 136), auf dem ein Zwischenbild erzeugbar ist, entsprechend den auf einen Aufzeichnungsträger (2, 114) zu druckenden Informationen, und mit einer Entwicklerstation (8, 126a bis 126e, 140a bis 140e), umfassend:einen ersten Betriebszustand, bei dem eine Tonermarke auf dem Zwischenbildträger (4, 122, 136, 130, 144) erzeugt wird, die Tonermarke anschließend abgetastet wird, insbesondere hinsichtlich ihrer Dichte, und dann wieder vom Zwischenbildträger (4, 122, 136, 130, 144) entfernt wird und der abgetastete Wert, insbesondere Tonerdichtewert, zur Regelung der Tonerkonzentration in der Entwicklerstation (8, 126a...126e, 140a...140e) verwendet wird, sowieeinen zweiten Betriebszustand, bei dem Informationen auf einem Zwischenbildträger (4, 122, 136, 130, 144) als Tonerbild erzeugt und später auf den Aufzeichnungsträger (2, 114) umgedruckt werden, wobeiim ersten Betriebszustand der Aufzeichnungsträger (2, 114) zumindest zeitweise von der Oberfläche des Zwischenbildträgers (4, 122, 136, 130, 144) abgehoben wird.
- Verfahren nach Anspruch 10, wobei nach einer vorgegebenen Zahl gedruckter Seiten des zweiten Betriebszustands in den ersten Betriebszustand umgeschaltet wird.
- Verfahren nach Anspruch 11, wobei die abgetasteten Dichtewerte mehrerer Tonermarken, insbesondere mehrerer Tonermarken, zwischen denen Geräte-Betriebsphasen des zweiten Betriebszustands lagen, gemeinsam zur Regelung der Tonerkonzentration in der Entwicklerstation (8) verwendet werden.
- Verfahren nach einem der vorhergehenden Ansprüche, wobei der abgetastete Dichtewert der Tonermarke zur Regelung der Tonerzufuhr in der Entwicklerstation (8, 126a bis 126e, 140a bis 140e) des Geräts verwendet wird.
- Verfahren nach einem der Ansprüche 10 bis 13, wobei im zweiten Betriebszustand die Tonerkonzentration in der Entwicklerstation (8, 126a bis 126e, 140a bis 140e) geregelt wird, indem aus einem beim vorgeschalteten ersten Betriebszustand ermittelten Tonerdichtewert ein Tonerkonzentrations-Sollwert oder ein Regelungsschwellwert gebildet wird und indem die Tonerkonzentration in der Entwicklungsstation (8, 126a bis 126e, 140a bis 140e) mit einem Tonerkonzentrationssensor (21) bestimmt wird.
- Elektrografisches Druck- oder Kopiergerät mit einem Zwischenbildträger (4, 122, 136, 130, 144), auf dem ein Zwischenbild erzeugbar ist entsprechend den auf einen Aufzeichnungsträger (2, 114) zu druckenden Informationen, umfassenda) eine Steuerung (25)a1) zur Erzeugung eines ersten Betriebszustands, bei dem eine Tonermarke auf dem Zwischenbildträger (4, 122, 136, 130, 144) erzeugt wird, die Tonermarke anschließend abgetastet und dann wieder vom Zwischenbildträger (4, 122, 136, 130, 144) entfernt wird unda2) zur Erzeugung eines zweiten Betriebszustands, bei dem Informationen auf dem Zwischenbildträger (4, 122, 136, 130, 144) als Tonerbild erzeugt und später auf den Aufzeichnungsträger (2, 114) umgedruckt werden, wobeia3) im ersten Betriebszustand der Umdruck von Informationen auf den Aufzeichnungsträger (2, 114) zumindest zeitweise verhindert wird undb) mit einem Umdruck-Verhinderungsmittel (15, 20) zur Verhinderung des Umdrucks im ersten Betriebszustand.
- Gerät nach Anspruch 15, wobei das Umdruck-Verhinderungsmittel (15, 20) den Aufzeichnungsträger (2, 114) von der Oberfläche des Zwischenbildträgers (130, 144) abhebt.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19900164 | 1999-01-05 | ||
DE19900164A DE19900164A1 (de) | 1999-01-05 | 1999-01-05 | Verfahren und Einrichtung zur Regelung der Tonerkonzentration in einem elektrografischen Prozess |
PCT/EP1999/010465 WO2000041038A1 (de) | 1999-01-05 | 1999-12-29 | Verfahren und einrichtung zur regelung der tonerkonzentration in einem elektrografischen prozess |
Publications (3)
Publication Number | Publication Date |
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EP1141787A1 EP1141787A1 (de) | 2001-10-10 |
EP1141787B1 true EP1141787B1 (de) | 2004-02-25 |
EP1141787B2 EP1141787B2 (de) | 2010-03-24 |
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ID=7893610
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EP99967019A Expired - Lifetime EP1141787B2 (de) | 1999-01-05 | 1999-12-29 | Verfahren und einrichtung zur regelung der tonerkonzentration in einem elektrografischen prozess |
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US (1) | US6498909B1 (de) |
EP (1) | EP1141787B2 (de) |
JP (1) | JP4301735B2 (de) |
DE (2) | DE19900164A1 (de) |
WO (1) | WO2000041038A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
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EP1254559A2 (de) * | 2000-02-04 | 2002-11-06 | Océ Printing Systems GmbH | Verfahren und einrichtung zur regelung der tonerkonzentration in einem elektrografischen prozess |
DE10136259A1 (de) | 2001-07-25 | 2003-02-20 | Oce Printing Systems Gmbh | Verfahren und Einrichtung zum Steuern eines Druckprozesses bei hoher Farbdichte |
DE10233671A1 (de) | 2002-07-24 | 2004-02-05 | OCé PRINTING SYSTEMS GMBH | Verfahren und Vorrichtung zum Einstellen der Tonerkonzentration in der Entwicklerstation eines elektrofotografischen Druckers oder Kopierers |
DE10246736A1 (de) | 2002-10-07 | 2004-04-22 | OCé PRINTING SYSTEMS GMBH | Verfahren und Vorrichtung zur Einstellung der Tonerzufuhr auf einen Mindestwert in eine Entwicklerstation einer elektrografischen Druck- oder Kopiereinrichtung |
DE10246737A1 (de) * | 2002-10-07 | 2004-01-15 | OCé PRINTING SYSTEMS GMBH | Verfahren zur Erzeugung eines neuen Träger und Toner aufweisenden Entwicklers in der Entwicklerstation einer elektrografischen Druck- oder Kopiereinrichtung |
DE10250827B3 (de) | 2002-10-31 | 2004-07-15 | OCé PRINTING SYSTEMS GMBH | Verfahren, Steuerungsschaltung, Computerprogrammprodukt und Druckgerät für einen elektrografischen Prozess mit temperaturkompensierter Entladetiefenregelung |
DE102004005964A1 (de) | 2004-02-06 | 2005-09-08 | OCé PRINTING SYSTEMS GMBH | Steuerungseinrichtung und Verfahren zum Steuern eines elektrofotografischen Druckers oder Kopierers |
US7350892B2 (en) * | 2004-12-17 | 2008-04-01 | Hewlett-Packard Development Company, L.P. | Printing system and method of printing an image in a fixed head printing system |
DE102006058579A1 (de) * | 2006-12-12 | 2008-06-26 | OCé PRINTING SYSTEMS GMBH | Verfahren und Vorrichtung zum Verarbeiten eines Messsignals zum Erfassen einer Eigenschaft einer Tonermarke |
DE102007002146B4 (de) | 2007-01-15 | 2008-11-27 | OCé PRINTING SYSTEMS GMBH | Verfahren zur Erhöhung der Druckgeschwindigkeit eines elektrografischen Farbdruckgeräts bei dessen Einsatz für Einfarbendruck |
US7890005B2 (en) * | 2009-01-07 | 2011-02-15 | Infoprint Solutions Company, Llc | Adjusting electrostatic charges used in a laser printer |
Family Cites Families (16)
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JPS5767943A (en) | 1980-10-16 | 1982-04-24 | Konishiroku Photo Ind Co Ltd | Retention type electrostatic recorder |
US4468112A (en) | 1981-02-18 | 1984-08-28 | Canon Kabushiki Kaisha | Developer concentration controlling device |
DE3807121A1 (de) | 1988-03-04 | 1989-09-14 | Siemens Ag | Elektrofotografische druckeinrichtung mit geregeltem elektrofotografischen prozess |
US5122835A (en) | 1991-05-06 | 1992-06-16 | Eastman Kodak Company | Compensating densitometer readings for drifts and dusting |
JP3542085B2 (ja) | 1991-12-09 | 2004-07-14 | 株式会社リコー | トナー濃度制御方法及び画像形成装置 |
JPH06289716A (ja) * | 1993-03-31 | 1994-10-18 | Fuji Xerox Co Ltd | 画像記録装置の濃度調整方法 |
US5518828A (en) | 1994-07-21 | 1996-05-21 | Bechtel Group, Inc. | Thermal integration of an air-cooled fuel cell stack |
EP0740221B1 (de) * | 1995-04-26 | 2001-10-10 | Canon Kabushiki Kaisha | Bilderzeugungsgerät und Zwischenübertragungselement |
JP3278553B2 (ja) † | 1995-07-18 | 2002-04-30 | キヤノン株式会社 | 画像形成装置 |
US5678131A (en) | 1995-08-22 | 1997-10-14 | Eastman Kodak Company | Apparatus and method for regulating toning contrast and extending developer life by long-term adjustment of toner concentration |
DE19541061C1 (de) | 1995-11-03 | 1996-11-07 | Siemens Nixdorf Inf Syst | Elektrografischer Drucker mit Ausgleichsvorrichtungen |
JP3576709B2 (ja) * | 1996-07-22 | 2004-10-13 | キヤノン株式会社 | 画像形成装置及び方法 |
JP3589270B2 (ja) * | 1996-10-21 | 2004-11-17 | セイコーエプソン株式会社 | 画像形成方法 |
JPH10274891A (ja) * | 1997-03-31 | 1998-10-13 | Ricoh Co Ltd | 画像形成装置 |
JP3508499B2 (ja) * | 1997-09-10 | 2004-03-22 | ミノルタ株式会社 | 画像形成装置 |
DE19749651C2 (de) | 1997-11-10 | 1999-10-14 | Oce Printing Systems Gmbh | Vorrichtung zum traktorlosen Transport eines bandförmigen Aufzeichnungsträgers in einem elektrografischen Aufzeichnungsgerät |
-
1999
- 1999-01-05 DE DE19900164A patent/DE19900164A1/de not_active Withdrawn
- 1999-12-29 EP EP99967019A patent/EP1141787B2/de not_active Expired - Lifetime
- 1999-12-29 JP JP2000592699A patent/JP4301735B2/ja not_active Expired - Fee Related
- 1999-12-29 WO PCT/EP1999/010465 patent/WO2000041038A1/de active IP Right Grant
- 1999-12-29 DE DE59908673T patent/DE59908673D1/de not_active Expired - Lifetime
- 1999-12-29 US US09/869,750 patent/US6498909B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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US6498909B1 (en) | 2002-12-24 |
DE19900164A1 (de) | 2000-07-27 |
JP2002534715A (ja) | 2002-10-15 |
WO2000041038A1 (de) | 2000-07-13 |
EP1141787B2 (de) | 2010-03-24 |
DE59908673D1 (de) | 2004-04-01 |
JP4301735B2 (ja) | 2009-07-22 |
EP1141787A1 (de) | 2001-10-10 |
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