EP1412819A2 - Procede permettant de commander une imprimante ou un copieur au moyen d'une bande de marques de toner, et detecteur de reflexion fonctionnant selon le principe de la triangulation - Google Patents

Procede permettant de commander une imprimante ou un copieur au moyen d'une bande de marques de toner, et detecteur de reflexion fonctionnant selon le principe de la triangulation

Info

Publication number
EP1412819A2
EP1412819A2 EP02767295A EP02767295A EP1412819A2 EP 1412819 A2 EP1412819 A2 EP 1412819A2 EP 02767295 A EP02767295 A EP 02767295A EP 02767295 A EP02767295 A EP 02767295A EP 1412819 A2 EP1412819 A2 EP 1412819A2
Authority
EP
European Patent Office
Prior art keywords
toner
brand
intermediate carrier
tape
band
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02767295A
Other languages
German (de)
English (en)
Other versions
EP1412819B1 (fr
Inventor
Hans Winter
Volkhard Maess
Heinrich Lay
Rüdiger HAUNS
Arno Best
Michael Mayr
Ulrich BÄUMLER
Thomas Schmidt-Behounek
Wolfgang Schullerus
Josef Schreieder
Uwe HÖLLIG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Production Printing Germany GmbH and Co KG
Original Assignee
Oce Printing Systems GmbH and Co KG
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 Oce Printing Systems GmbH and Co KG filed Critical Oce Printing Systems GmbH and Co KG
Publication of EP1412819A2 publication Critical patent/EP1412819A2/fr
Application granted granted Critical
Publication of EP1412819B1 publication Critical patent/EP1412819B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/50—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
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/1605—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support
    • 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 for controlling a printer or copier, in which mark data for toner marks for a character generator are kept in an image control and in which the character generator generates a latent image on an intermediate carrier corresponding to the mark data, which is subsequently colored with toner material , whereby toner marks are generated on the intermediate carrier.
  • the invention further relates to a device for performing this method.
  • the invention relates to a method for controlling a printer or copier using an optical reflex sensor and a device therefor.
  • the intermediate carrier which is, for example, an organic photoconductor tape, also called an OPC tape (OPC organic photoconductor), or to a transfer tape; these toner marks are scanned using sensors and their results are used to control the printing process.
  • OPC tape OPC organic photoconductor
  • the blackening of the toning mark can be measured using a reflex sensor.
  • Another possibility is to measure the toner layer thickness using a capacitive layer thickness sensor.
  • Another method uses electrical toner charge, where the charge potential is measured using a potential sensor.
  • an electrophotographic printing device in which two printing units print images on a transfer belt, which in the further course these images are placed on a carrier material, e.g. Paper transfers.
  • a character generator assigned to the first printing unit a mark is printed on the transfer belt at the beginning of each image by the first printing unit. This mark can be used to precisely determine the runtime for the image from its creation.
  • US-A-5, 995, 802 describes a printing device in which a plurality of printing units are arranged and print images with different colors for a 4-color printing on a transfer belt. Outside the actual printing area, several brands were printed regarding the basic colors black, yellow, magenta and cyan and evaluated for process control.
  • This object is achieved for a method for controlling a printer or copier in that mark data for toner marks for a character generator are kept in an image control, and the character generator on a subcarrier has a latent image corresponding to the mark data generated, which is colored with toner material in the further course, a plurality of marks are combined in the image control to form a coherent brand band, each brand having a locally defined position within the brand band on the intermediate carrier, and that the colored toner marks of the brand band by at least one Sensor can be scanned, the signal of which is used to control the printing process.
  • a large number of brands which are required for the different electrophotographic or electromagnetic printing processes are stored in a branded band. Accordingly, only one or more brand tapes need to be called up for the various electrophotographic or electromagnetic processes of a device type and the
  • Character generator can be controlled accordingly to print the required toner marks. In this way, the technical effort is minimized and the handling of toner brands is standardized.
  • Another aspect of the invention relates to the evaluation of the toner marks using a sensor system.
  • the color density of colored areas achieved with the aid of toner depends on a large number of process parameters.
  • a significant influence comes from the thickness of the toner covering reached on the intermediate carrier, e.g. the photoconductor, which in turn can depend on several other process parameters, such as the specific surface charge of the toner or the potential difference between the photoconductor surface and the Surface of a donor element.
  • the printing process must be able to keep the optical density within narrow limits for a relatively long time.
  • one or more toner marks are placed at regular intervals created on the intermediate carrier, mostly in an area that is normally not reprinted. These toner marks are then detected and evaluated by sensors, for example in order to influence the important operating size of the average area-related toner mass allocation.
  • a method for controlling a printer or copier is specified in which an optical reflex sensor is used as the sensor for scanning the respective toner mark, which determines the thickness of the toner layer of the toner mark according to the triangulation method, depending on the printing process is controlled by the determined thickness of the toner layer.
  • the area-related toner mass coating can be drawn directly from the determined thickness of the toner mark.
  • This mass coating is an immediate input variable for controlling the various parameters of the printing process. In this way, the quality of the printing process can be further improved.
  • very thick and optically opaque toner layers can also be evaluated.
  • FIG. 1 shows the basic structure of a printer that can print printed images on both sides of a carrier material
  • FIG. 2 brand tapes and printed images in which the beginning of the first brand tape is synchronized with the beginning of the first printed page
  • Brand tape is synchronized with the beginning of each print page
  • FIG. 4 shows a block diagram with different functional units, the data for the different brand tapes being asynchronous at the Transfer of the print data to the character generator are added,
  • FIG. 5 shows a block diagram with different functional units, the data for the various brand tapes being added asynchronously or synchronously with the printed image before being rasterized in the controller,
  • FIG. 6 shows a block diagram with different functional units, the marks being read using different sensors
  • FIG. 7 shows the basic structure of a reflex sensor using the triangulation principle
  • FIG. 9 shows a structure of a reflex sensor using a single detector with an oscillating mirror.
  • Figure 1 shows a printer that works on the electrophotographic printing principle.
  • double-sided printing is carried out on a carrier material 10, for example a paper web.
  • a carrier material for example a paper web.
  • an upper photoconductor belt also called an OPC belt
  • an upper character generator 14a generates a latent image.
  • the character generator 14a also generates the toner mark tapes with the toner marks.
  • a potential sensor 16a detects the charge potential of the tape and the latent image and the tape; its signal is used for process control.
  • An upper developer station 18a colors the latent image with the printed images and the toner marks with toner material.
  • a toner mark sensor 20a is connected downstream of the developer station 18a. which evaluates the toner marks.
  • the toner image applied to the photoconductor belt 12a is transferred to an upper transfer belt 22a and from there is printed onto the upper side of the carrier material 10.
  • the underside of the carrier material 10 is printed in a similar manner, for which purpose the function units of the same structure and arrangement, namely lower photoconductor belt 12b, lower character generator 14b, lower potential detector 16b, lower developer station 18b, lower toner mark sensor 20b and lower transfer belt 22b are used.
  • the carrier material 10 thus printed simultaneously and on both sides is fixed and dispensed simultaneously in a fixing station 24 above and below.
  • the structure of the upper printing unit and the lower printing unit shown is suitable for printing several color separations.
  • the respective transfer belt 22a, 22b collects a plurality of toner layers of different colors of a print image one above the other and then prints them on the carrier material 10.
  • the examples of toner belts described below, their evaluation and the various types of device structure can be used for the print shown in FIG. ? ker be used.
  • Figure 2 shows the structure of brand tapes 30 to 40, which belong to the printed images 42 to 48.
  • a large number of toner brands are combined in each brand band 30 to 40.
  • Each brand has a locally defined position within the brand band 30 to 40.
  • the marker tapes 30 to 40 are applied to the intermediate carrier in an area which is usually outside of the printed image to be printed, for example along an edge track. In this way, the printed images 42 to 48 are not disturbed.
  • the start of the first brand tape 30 is synchronized with the start of the first print page 42 each time the print starts.
  • the following branded bands 32 to 40 are then directly attached to one another without a space, ie only the first branded band is synchronized with the first printed page 42; all other branded bands 32 to 40 are asynchronous to the other printed pages 44 to 48 etc.
  • the advantage of this arrangement is that the length of the respective branded band can be independent of the length of the printed pages; in other words, the length of the brand tapes 30 to 40 can be chosen to be any length, regardless of the form. In such a case, the form lengths can be different and any length.
  • the form length has no influence on the required process control, which is carried out with the help of the toner brands of the brand bands 30 to 40.
  • a disadvantage of this version is that the device control must manage each beginning of the individual brand bands 30 to 40 independently of the printed pages 42 to 48.
  • FIG. 3 shows another variant in which the brand tapes 30 to 38 are each synchronized with the start of each print page 42 to 50. It is advantageous here that the start of a respective brand tape 30 to 38 and the start of a respective print image 42 to 50 can be triggered together.
  • the disadvantage may be that the length of the respective brand tape 30 to 38 can be at most the length of the respective printed image 42 to 50; there is therefore a limitation for the branding tapes, depending on the printed image. In the case of very long forms, it can happen that the length of the associated brand tape is very short in relation to the length of the form, so that precise regulation of the electrophotographic process over the large length of the printed image is not ensured.
  • One solution to this problem provides that several brand tapes are added within such a long printing page, so that the maximum The distance between successive brand tapes does not become too large, for example, does not become larger than about 50 cm (20 inches).
  • FIG. 4 shows a block diagram with different functional units.
  • the character generator e.g. The character generator 14a or 14b according to FIG. 1 receives data from the control units for the printed images and for the brand tapes.
  • a controller 52 accesses a branded tape memory 54, in which data about the branded tapes is stored, and a page memory 56, in which the data for the printed images of the
  • Print pages are saved.
  • the data is scanned individually for each side and for the brand tape, i.e. a bitmap for the print page and a bitmap for the label tape are created.
  • the controller 52 transmits the data of the bitmaps to a conversion unit 58, in which the bitmap data of the page memory 56 and the data of the branded tape store 54 are combined, indicated by an addition block 60.
  • the data of the branded tapes are thus given when the print data are transferred tied to the character generator 14a, 14b.
  • a device controller 62 controls an electronic shutter 64 in such a way that the necessary toner marks are switched through in data form from the branded tapes, the other toner marks being filtered out. In this way, brand tapes can be changed at will without changing printed pages.
  • printing operation is restarted after a stop, only the data of the brand tape have to be rasterized in this variant; the bitmap data of the respective print page remain unchanged. In this way, the processing speed when creating the bitmaps in the controller 52 is
  • FIG. 5 shows another variant, in which the same parts are labeled identically.
  • the data of the various brand tapes are created in the controller 52 prior to the rasterization, in which, as expected, a bitmap of the pixels to be printed is created is asynchronously or synchronously linked to the data of the respective print image.
  • the electronic aperture 64 has the task of filtering out unnecessary toner marks in the toner ribbons. This is necessary so that such unnecessary toner marks are not transferred to the carrier material, because they would have to be completely removed from a downstream cleaning station, i.e. getting cleaned. However, such cleaning is complex and not necessarily reliable. It is therefore important to write only the toner marks that are actually required in the marginal trace.
  • the toner marks on the photoconductor belt 12a, 12b are evaluated with the aid of sensors.
  • Figure 6 shows the use of three different sensors 66, 68, 70. Since the different toner marks must be permanently assigned to these different sensors 66, 68, 70, it must also be ensured that each sensor only measures the toner mark intended for it.
  • the device control To synchronize the writing of the toner mark and the reading of the toner mark, the device control generates a trigger pulse for the sensors 66, 68, 70 via the line 72 at each start of the respective brand band.
  • the device control 62 stores the time offset to the trigger pulse on line 72 and communicates it to the respective sensors 66, 68, 70 which is to evaluate this mark.
  • the device controller Since the device controller knows the location of the respective brand tape and the location of the toner brand therein in relation to the respective sensor 66, 68, 70 at any time, it can be used by any sensor 66, 68, 70 the time of the passage of the respective brand.
  • each sensor 66, 68, 70 can evaluate several toner marks one after the other.
  • toner marks that are printed on the transfer belt 22a, 22b with the aid of sensors.
  • Brand data can also be stored for a variety of toner brands; A brand tape or several brand tapes can then be put together from this multiplicity of toner brands, an associated brand tape being selected as a function of the selected printing process.
  • all of the token brands can be provided for different types of a device type and combined to form brand bands.
  • the electronic screen it is then possible to select the toner marks that are actually required on the brand tapes.
  • a single brand band is defined, the toner brands of which allow the multitude of printing processes of a device type to be controlled by a printer or copier. This measure serves to standardize and simplify the software handling of the toner brands.
  • two printing units each with a transfer belt
  • the upper transfer belt 22a providing the upper side of the carrier material 10 with a toner image
  • the lower transfer belt 22b likewise providing a toner image. Branded bands with toner marks are applied to each transfer belt.
  • the application of the branded bands on the two transfer bands 22a, 22b takes place in such a way that at the common transfer printing point for both transfer bands 22a, 22b there are not two toner brands colored with toner at the same time. In this way, the problem of toner dust generation is avoided.
  • the toner marks of the toner ribbons are in the marginal track outside of the carrier material. If the toner mark of the upper transfer belt and the toner mark of one of the lower transfer belt touched in this edge zone due to the lack of paper in this area, toner dust was generated. The aforementioned training avoids this problem.
  • FIG. 7 shows a basic illustration of an optical reflex sensor for scanning the toner mark, as can be used, for example, as a toner mark sensor 20a, 20b according to FIG. 1.
  • the reflex sensor contains a laser diode 80 as the radiation source, the radiation of which is focused by a collimator lens 82 to form a scanning beam 84.
  • the laser diode 80 emits monochromatic radiation, for example in the near infrared range. However, other wavelength ranges of the radiation can also be used.
  • the essentially vertically incident scanning beam 84 strikes the respective surface when the intermediate carrier 86 passes with the toner mark 88.
  • FIG. 7 it is shown that the scanning beam 84 strikes half the surface of the toner mark 88 and the surface of the intermediate carrier 86, for example a photoconductor tape, and generates a measuring spot 90 and 92 there, respectively.
  • the measuring spots 90, 92 are typically smaller than 1 mm 2 .
  • the radiation is largely diffusely reflected by the respective measurement spot 90, 92.
  • Imaging optics 96 for example a converging lens, delimited by an aperture 94 form the measurement spots 90, 92 ⁇ onto a linear detector array 98 as a measurement spot 90, 92 from ⁇ .
  • the imaging beam of the measurement spot 90 is shown in dash-dot lines in FIG. 7 and has the reference symbol 100.
  • the radiation beam emanating from the measurement spot 92 is shown in dashed lines in FIG. 7 and has the reference number 102.
  • the measuring spots 90, 92 have a vertical distance H corresponding to the thickness of the toner mark 88 from one another.
  • the measuring spots 90 ⁇ and 92 ⁇ shown are at a distance D from one another.
  • the sizes H and D are in an exact ratio defined by the geometry of the optical beam path. From the distance D, conclusions can be drawn unambiguously about the height H and thus the thickness of the toner mark 88.
  • the angles 104 and 106 between the scanning beam 84 and the respective center beams of the beams 100, 102 are also included in the calculation.
  • the linear detector array 98 converts the striking radiation into electrical voltages, which are processed by a digital signal processor 108 in the form of signal profiles.
  • the center of gravity of the signal profiles can be determined via the measuring spots 90, 92 ⁇ .
  • the distance between these centroids then leads to the size D and thus indirectly to the size H.
  • the determination of the distance H from the distance D of the measurement spots 90 92 ⁇ is also referred to as the triangulation method.
  • other calculation rules can also be used which result in a clear connection between the quantities D and H.
  • the area-related mass coating in grams per unit area of the toner can be determined from the thickness H of the toner layer of the toner mark 88 by calibration. Such a size is particularly well suited to control the printing process.
  • the signal processor 108 forwards the values determined by it via the line 110 to the device control for the printer or copier.
  • the laser diode 80 the output power of which is typically in the range of 1 mW, is controlled by a controllable current source 110 by the signal processor 108.
  • the current supplied to the laser diode 80 can be dimensioned such that the signal at the detector array 98 lies within a predetermined range. Understeering and oversteering can be avoided in this way.
  • the current for the laser diode 80 can be set such that the signal on the side of the detector array 88 remains constant regardless of the reflectivity of the toner mark 88 or the surface of the intermediate carrier 86.
  • the sensor arrangement is independent of the reflectivity of the toner mark 88 or of the intermediate carrier 86, as a result of which the signal-to-noise ratio when scanning surfaces with better contrast is improved.
  • a color filter can be connected in front of the detector array 98, preferably a bandpass filter, which is matched to the wavelength of the radiation from the laser diode 80. Extraneous light is thus filtered out.
  • Figure 8 shows a further embodiment of the reflex sensor; same parts are labeled the same.
  • a planar, strip-shaped Fresnel lens is provided as imaging optics 96, which directs the diffuse light emanating from the measuring spot onto the detector 98 via a microprism 112.
  • the microprism 112 deflects the radiation by 90 °.
  • the components Fresnel lens and microprism 112 can be produced economically using impression technology. With the arrangement shown in Figure 8, the structure can be significantly reduced and simplified.
  • FIG. 9 shows a further exemplary embodiment of the reflex sensor, with a single detector 114 being used as the radiation receiver, for example a detector which works according to CMOS technology. For reasons of size, a Fresnel lens is again used as imaging optics 96.
  • the radiation is fed to the single detector 114 via a controllable oscillating mirror 116.
  • This oscillating mirror is applied to an electrically conductive substrate with the electrodes 118 and is elastically suspended by torsion springs 120.
  • the oscillating mirror 116 is set in periodic oscillations of constant amplitude according to the arrow 122.
  • the light impinging on the individual detector 114 therefore has a time modulation and accordingly also the electrical signal emitted by it.
  • This signal also contains the time course of the brightness and thus the course of the measurement spot over the imaging location, from which the height H of the toner mark 88 can be concluded.
  • the voltage at the electrodes 118 is regulated so that the individual detector 114 always receives the maximum luminance of the light directed onto it.
  • the electrode voltages are a measure of the position of the respective measuring spot.
  • a piezoelectric or an electromagnetic transducer can be used as the drive for the oscillating mirror 116.
  • the measuring principle described is used in connection with the scanning of toner marks on an intermediate carrier 86, which is generally designed as a photoconductor, for example as a photoconductive belt.
  • a photoconductive tape generally requires a certain recovery time after exposure to an intense radiation source, so that with which a defined discharge state is established in subsequent exposure processes. If this recovery time is too short, a memory effect occurs, ie the effect of several successive exposure processes is partially added and the photoconductive surface is discharged more deeply than desired. This memory effect affects the accuracy of the measurement process on the toner mark. To avoid this memory effect, three options are presented below.
  • a first possibility is to weaken or interrupt the scanning beam.
  • the power supply for the beam source e.g. the laser diode 80
  • Another variant is the interruption of the scanning beam 84 with the aid of a mechanical diaphragm, for example a rotating diaphragm.
  • Another possibility for interrupting the scanning beam 84 is the use of an electro-optic liquid crystal shutter which is switched from a transparent state to a diffuse state when an electrical voltage is applied, so that the scanning beam 84 is scattered in a highly diffuse manner and not a sharply focused measuring spot occurs on the surface of the photoconductor 86. There is therefore no measurable discharge of the photoconductor.
  • Such an arrangement requires no moving parts and ensures short response times in the range below one millisecond.
  • a second way to avoid the memory effect is to vary the position of the toner marks.
  • toner brands are used that are several times the required
  • the scanning beam can then be shifted from one cycle to the next of the photoconductor, for example by at least one track width, so that the recovery time for the exposed track is extended.
  • the scanning beam can be displaced, for example, by mechanically displacing the sensor head or the beam source. Another option is to rotate the Sensor head or the beam source about an axis parallel to the scanning beam 84, which lies outside the beam axis. Another possibility is the choice of optical means, for example mirrors or prisms, which are moved mechanically.
  • a third possibility for avoiding the memory effect lies in the choice of a wavelength of the radiation for the radiation source, for which the photoconductor is not sensitive. If, for example, the photoconductor is sensitive in the long-wave radiation range and insensitive in the short-wave radiation range, no memory effect can be caused when using a radiation source with short-wave radiation.
  • Particularly suitable as radiation receivers are CCD detectors, which, because of their broadband sensitivity, are suitable for registering radiation in the visible and near infrared range.
  • the reflex sensor described in the previous figures is suitable for determining both partially transparent and opaque toner layers of a toner mark of different colors on a background with almost any color and reflectivity.
  • the important size for the mass coating of the toner can also be determined on the basis of a thickness measurement.
  • the described reflex sensor can be modified in many ways.
  • beam sources with different wavelengths can also be used, as a result of which an adaptation to the reflectivity of the particular toner used can take place.
  • an adaptation to the reflectivity of the particular toner used can take place. For example, to generate the
  • the light from two discrete laser diodes can be coupled into a common beam path.
  • a partially transparent mirror is advantageously used for this.
  • the brightness distribution on the detector array forms two geometrically distinct brightness maxima when the measurement spot overlaps the edge of the toner mark. sweeps.
  • the geometric distance between the brightness maxima on the detector array is a measure of the height of the step between the intermediate carrier and the toner mark surface. It is also advantageous to use rasterized toner marks whose raster width is smaller than the radius of the scanning beam. Then there are always two brightness maxima on the detector when the scanning beam sweeps over the screened toner mark.
  • a vertically emitting laser diode known as a VCSEL component
  • VCSEL vertical cavity surface emitting laser diode
  • the small divergence angle and the approximately circular beam cross section of the VCSEL component require no or only very simple optical elements for beam shaping.
  • the described reflex sensor can be easily integrated into a CAN network, as is required to control complex electrophotographic printing presses which use processor modules networked via a fieldbus system.
  • the signal processor 108 then advantageously already contains a corresponding interface for connection to the CAN network.
  • the described reflex sensor can also be used to measure the contrast of toner coverings. For this, a total value of the light striking the detector array is calculated for a given illuminance. In this way, for example, weakly reflecting toner deposits can be detected and this can be used to control the printing process. LIST OF REFERENCE NUMBERS

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Color Electrophotography (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Counters In Electrophotography And Two-Sided Copying (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Fax Reproducing Arrangements (AREA)

Abstract

L'invention concerne un procédé permettant de commander une imprimante ou un copieur. Selon ce procédé, une pluralité de marques sont réunies pour constituer une bande continue de marques (30 40). Les images d'impression (42 48) sont associées auxdites bandes de marques (30 40).
EP02767295A 2001-08-02 2002-07-31 Procede permettant de commander une imprimante ou un copieur au moyen d'une bande de marques de toner, et detecteur de reflexion fonctionnant selon le principe de la triangulation Expired - Lifetime EP1412819B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10137861 2001-08-02
DE10137861A DE10137861A1 (de) 2001-08-02 2001-08-02 Verfahren zum Steuern eines Druckers oder Kopierers unter Verwendung eines Tonermarkenbandes sowie eines nach dem Triangulationsprinzip arbeitenden Reflexsensors
PCT/EP2002/008563 WO2003012552A2 (fr) 2001-08-02 2002-07-31 Procede permettant de commander une imprimante ou un copieur au moyen d'une bande de marques de toner, et detecteur de reflexion fonctionnant selon le principe de la triangulation

Publications (2)

Publication Number Publication Date
EP1412819A2 true EP1412819A2 (fr) 2004-04-28
EP1412819B1 EP1412819B1 (fr) 2009-10-07

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EP02767295A Expired - Lifetime EP1412819B1 (fr) 2001-08-02 2002-07-31 Procede permettant de commander une imprimante ou un copieur au moyen d'une bande de marques de toner, et detecteur de reflexion fonctionnant selon le principe de la triangulation

Country Status (5)

Country Link
US (1) US7260334B2 (fr)
EP (1) EP1412819B1 (fr)
JP (1) JP2004537438A (fr)
DE (2) DE10137861A1 (fr)
WO (1) WO2003012552A2 (fr)

Families Citing this family (9)

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Publication number Priority date Publication date Assignee Title
DE102004024047A1 (de) 2004-05-14 2005-12-08 OCé PRINTING SYSTEMS GMBH Verfahren und Vorrichtung zum Einfärben eines Applikatorelements eines elektrofotografischen Druckers oder Kopierers
DE202005021983U1 (de) 2005-07-15 2012-02-13 Eastman Kodak Company Vorrichtung zur Erkennung einer Kante, insbesondere eines Bedruckstoffes, in einer Druckmaschine
DE102005033759B4 (de) * 2005-07-15 2012-04-12 Eastman Kodak Company Verfahren zur Erkennung einer Seitenkante eines semitransparenten Bedruckstoffes in einer Druckmaschine
DE102008030972A1 (de) * 2008-06-30 2009-12-31 OCé PRINTING SYSTEMS GMBH Verfahren zur Ermittlung der Zeichenbreite von aus Druckpunkten aufgebauten Zeichen bei einem Druck- oder Kopiergerät
DE102008038770A1 (de) 2008-08-12 2010-02-25 OCé PRINTING SYSTEMS GMBH Verfahren und Anordnung zum Steuern eines Druckers oder Kopierers
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JP2004537438A (ja) 2004-12-16
EP1412819B1 (fr) 2009-10-07
US20060251436A1 (en) 2006-11-09
WO2003012552A2 (fr) 2003-02-13
DE10137861A1 (de) 2003-02-27
WO2003012552A3 (fr) 2003-11-13
DE50213905D1 (de) 2009-11-19
US7260334B2 (en) 2007-08-21

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