EP1151355B1 - Dispositif pour surveiller le transport d'un support - Google Patents

Dispositif pour surveiller le transport d'un support Download PDF

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Publication number
EP1151355B1
EP1151355B1 EP99962204A EP99962204A EP1151355B1 EP 1151355 B1 EP1151355 B1 EP 1151355B1 EP 99962204 A EP99962204 A EP 99962204A EP 99962204 A EP99962204 A EP 99962204A EP 1151355 B1 EP1151355 B1 EP 1151355B1
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EP
European Patent Office
Prior art keywords
carrier
sensor
pulse sequence
band
printing
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
Application number
EP99962204A
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German (de)
English (en)
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EP1151355A1 (fr
Inventor
Josef Schreieder
Hans Winter
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.)
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Publication date
Application filed by Oce Printing Systems GmbH and Co KG filed Critical Oce Printing Systems GmbH and Co KG
Publication of EP1151355A1 publication Critical patent/EP1151355A1/fr
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Publication of EP1151355B1 publication Critical patent/EP1151355B1/fr
Anticipated expiration legal-status Critical
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    • 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
    • G03G15/5008—Driving control for rotary photosensitive medium, e.g. speed control, stop position control

Definitions

  • the invention relates to a device for monitoring the Transport of a band-shaped carrier in a printing device.
  • Such printing devices are used in one Printer or copier. It is often done by means of a electrographic process on a tape-shaped toner image carrier creates a latent image, which then follows Toner accumulates.
  • the toner image carrier is common formed as a self-contained band that over rolls runs and is driven by a drive roller.
  • the latent image can e.g. by exposing a photoconductor or by magnetizing a magnet sensitive Layer are generated.
  • a transfer location that will Toner image then from the carrier to a recording medium, e.g. Paper, reprinted and later affixed to it.
  • a form has so-called form windows in which certain Information should be reprinted. Thereby may the corresponding toner image e.g. not over the windows Rather, it should rather be centered in the Windows can be reprinted.
  • a printing device is known from EP 0523870, at the successively several drawing files of different colors be produced on a tape-shaped toner image carrier.
  • the individual drawing files each have a defined distance from each other and will be shown when repeated of a record carrier at a transfer printing station identical transfer-printed. So an uneven rotation of the individual rollers on which the toner image carrier runs, not to a deterioration in the printing result due to a non-congruent reprint of the drawing files leads, all rollers have the same diameter, that the distance between two successive. fields equal to the size of a roll or a multiple of it is. Periodic changes in transport speed thus have the same effect on all drawing files out.
  • WO98 / 39691 is a printing device with two Printing works known, with which both sides of one Have the recording medium printed at the same time. Just with such a printing device are particularly high Position accuracy requirements for transfer printing posed.
  • US 5096044 a device is described in which monitors the transport of a band-shaped carrier becomes.
  • the residence time of a wedge-shaped Mark on the carrier in the detection area of a sensor determined and compared with a target value that depends determined by the signal from another sensor is that the speed of the drive roller for the Carrier corresponds.
  • the transport of the carrier is interrupted if the dwell time exceeds a limit or falls below.
  • US-A-5,300,983 shows a device in which one wedge-shaped mark printed on the carrier and its dwell time is determined in the detection range of a sensor.
  • the residence time also do not differentiate whether the wearer's track or its transport speed has changed.
  • JP-08-076 546 a device is known which a first pulse train for the carrier and a second pulse train generated for its drive roller.
  • the facility measures the time between a pulse of the first pulse train and the subsequent pulse of the second pulse train. The maximum permissible for a good printing result The value of this time depends on the transport speed of the wearer.
  • JP-05-11525 shows a similar device, where the number of pulses in a pulse train for one Drive motor between two pulses of a pulse train for the carrier is determined. With this facility, the for a good printing result the maximum permissible number of pulses also depends on the transport speed of the carrier.
  • JP-05-281807 also shows a device with a Mark on a ribbon-shaped carrier.
  • the pulse number of a pulse train is set up measured for a drive roller during one revolution of the mark and compared with a setpoint determined without slip.
  • it cannot be differentiated here whether a deviation from the target value due to a change in slip or by changing the length of the band Carrier is caused.
  • a device is known from US-A-5,233,402 that with a sensor the orbital period of a brand on one Photoconductor tape measured and depending on the measurement result the scanning speed of the photoconductor tape with a Scanning beam is set.
  • This facility can be multiple toner images of different colors Print congruently on the photoconductor tape, if excessive Slip between the drive roller and the photoconductor belt however, there is increased wear.
  • the task is carried out by a facility for monitoring the Transport of a band-shaped carrier in a printing device solved, in which a drive roller a band-shaped Drives the carrier by friction on its circumference, the rotation of the drive roller by a first Mapped sensor in a first electrical pulse train the forward movement of the carrier by a second sensor mapped into a second electrical pulse train the time interval between two pulses the respective pulse train a certain distance traveled Angle of rotation or path corresponds to a control device the ratio of the time intervals of the first pulse train and the second pulse train, and at which, depending on this ratio, controls the printing operation is acted upon.
  • the angle of rotation traveled by the drive roller or the distance traveled by the wearer is known, of the two successive pulses of each corresponds to the pulse sequence concerned, and also the radius the drive roller is fixed. Therefore, the Control unit from the respective pulse sequence simply the Circumferential speed of the drive roller and the transport speed of the wearer. From the relationship the time intervals between the two pulse trains can then slip the carrier against the drive roller directly determined and controlling depending on the ratio be influenced on the printing operation. If the slip may exceed a limit e.g. the printing company to be interrupted. It is also possible to determine the orbital speed the drive roller depending on the ratio to control the time intervals of the two pulse sequences that the carrier with a constant, predetermined Transport speed is moved forward.
  • a calibration process the slip is set to a minimum value.
  • the control device takes this when calibrating the second electrical pulse train as a reference. The This allows determination of the slip in the printing operation particularly easy from the relative change in the time intervals determine the second pulse train.
  • the controller preferably determines from the ratio the time intervals of the pulse trains the slip.
  • a such direct slip measurement makes it possible to do so early to influence the printing operation, even before the Toner images are positioned so imprecisely that rejects is produced.
  • the first or second sensor with each revolution of the drive roller or at least with each circulation of the carrier an electrical impulse. This allows slip measurements carried out at least once per revolution or revolution become. This not only allows very slow changes in slip monitor.
  • An embodiment of the invention is characterized by this from that at least one mark placed on the carrier with the second sensor sensing the mark's passing and generates an electrical pulse when detected.
  • This embodiment is technically simple to implement.
  • the brand can e.g. a simple slit in that Carrier or a mirror plate attached to it.
  • a transmitted light sensor or a reflected light sensor can then be used as the sensor be used.
  • the mark of one Image generation unit generated on the carrier can e.g. be positioned close to the toner image. aid this mark can then be directly identified received about the slip, when printing this toner image occured.
  • the brand can also serve to position the toner image more precisely, a such a mark created on the carrier enables the application a device according to the Invention also with one not closed band-shaped carrier.
  • At least one pulse train can also come from a clock disc be generated. Then the slip lets through Determine merely counting the pulses without an additional one Timekeeping is needed.
  • the carrier In a further development of the invention there are at least two Marks arranged on the carrier. It is a drive for the drive roller is provided and the marks have one such a distance from each other that the drive again in the same position when the wearer is around one that corresponds to the distance between the brands Has moved forward. All individual elements of the The drive and the drive roller itself are small Dimensions made out of round or have slightly eccentric Axes. This overlaps them proportionately slow slip changes, fast synchronization fluctuations. These rapid synchronism fluctuations are at Slip measurement according to the invention is not taken into account.
  • FIG. 1 shows an embodiment of a device for monitoring the transport of a belt-shaped carrier 10 in a printing device.
  • the carrier 10 can be a photoconductor belt or a transfer belt.
  • the carrier can be an endless belt, that is to say closed. It can also consist of a band-shaped material, preferably a paper web.
  • the carrier 10 moves at a speed V B in the direction indicated by an arrow. It is driven by a drive roller 12 which rotates at the peripheral speed V W in the direction also indicated by an arrow.
  • a reflective plate 14 is arranged on the carrier 10, and a magnetic plate 16 is fastened in an outer region of the drive roller 12.
  • a reflected light sensor 24 is a second sensor near the outer peripheral surface of the band-shaped carrier 10 arranged. The reflected light sensor 24 is via a signal line 26 also connected to the control device 22.
  • the magnetic plate 16 rotates at an angular speed of the drive roller 12 corresponding to the peripheral speed V W.
  • the magnetic sensor 18 detects the passing of the magnetic plate 16, generating an electrical pulse each time it passes, which is transmitted from the signal line 20 to the control device 22.
  • the reflecting plate 14 rotates at the speed V B of the carrier 10, and its passing the reflected light sensor 24 is detected by the latter.
  • the electrical pulse generated by the reflected light sensor 24 is transmitted from the signal line 26 to the control device 22.
  • FIG. 2 shows two pulse sequences that were each generated by the sensors 18, 24 of the exemplary embodiment in FIG. 1.
  • a first pulse sequence generated by the magnetic sensor 18 is shown at the top in FIG. 2, which represents the rotary movement of the drive roller 12.
  • Time t is plotted on the abscissa and voltage V is plotted on the ordinate.
  • the magnetic sensor 18 generates an electrical pulse each time the magnetic plate 16 passes by.
  • Two successive pulses of the first pulse sequence have the time interval T W , which is in the relationship B1 shown in FIG. 4 with the peripheral speed V W of the drive roller 12. Where d is the diameter of the drive roller 12.
  • a second electrical pulse sequence is shown at the bottom in FIG. 2, with which the forward movement of the carrier 10 is imaged.
  • Time t is again plotted on the abscissa and voltage V is plotted on the ordinate.
  • V is plotted on the ordinate.
  • the plate 14 runs past the reflex sensor 24, the latter generates an electrical pulse each time, the time interval between two successive pulses being T B.
  • the time interval T B fulfills the relationship B2 in FIG. 4, where V B is the speed and L B is the length of the carrier 10.
  • Figure 3 shows a process flow for determining the Slippage between the drive roller 12 and the carrier 10.
  • the process is started in method step S10. in the Step S12 can parameters for the slip determination can be entered.
  • step S16 follows. 4, the slip S is determined from the time intervals T W , T B of the first and the second pulse sequence. In the relationship B3, L W is the circumference of the drive roller 12 and L B is the length of the carrier 10. The slip S is determined several times in succession in accordance with the number n entered in method step S12 and the mean value is formed from the individual results. The influence of periodic speed fluctuations, for example if the drive roller 12 is not completely round, can thereby be reduced. The process in step S18 is then ended.
  • the slip in method step S16 can also be determined in another way.
  • the drive roller 12 and the carrier 10 are brought into a state in which practically no slippage occurs. This can be done by reducing the band load of the band-shaped carrier. In this state, the time interval between two successive pulses of the second pulse sequence is determined and stored as a reference value T B0 .
  • the slip S is then calculated according to the relationship B4 in FIG. 4. If the slip S is determined in this way, the magnetic plate 16, the magnetic sensor 18 and the signal line 20 are not required and can accordingly be omitted.
  • FIG. 5 shows a further embodiment of the invention.
  • the same elements have the same reference symbols as in the embodiment of Figure 1.
  • the drive roller 12 has a pulley in this embodiment 28 with 72 teeth.
  • the pulley 28 is over a Timing belt 30 with 90 teeth with a pulley 32 one Stepper motor connected, the pulley 32 18 teeth Has.
  • On the outer peripheral surface of the carrier 10 is a second reflective plate 34 attached.
  • the drive roller 12, the belt wheels 28, 32 and also the toothed belt 30 generally have manufacturing defects. That is, the drive roller 12 and the belt wheels 28, 32 are not ideally round or their respective axes of rotation are not perfectly centered, and the toothed belt 30 has a different thickness along its circumference. All of this leads to so-called runout errors, that is, periodic synchronism fluctuations. If one determines the slip S from the time intervals T B of the pulses generated by the reflected light sensor 24 as the plates 14, 34 pass, these periodic synchronism fluctuations lead to errors in the determination of the slip S.
  • the distance between the two reflecting plates 14, 34 is chosen so that in a state without slippage Pulley 12 and thus the drive roller 28 five times around has rotated its own axis when the carrier 10 out of the shown position has moved into a position in which the second plate 34 detected by the reflected light sensor 24 becomes.
  • the toothed belt 30 has four and the pulley 32 made twenty revolutions. The corresponds exactly to the smallest common multiple of respective number of teeth.
  • the controller 22 determines the time T B from the point in time at which the reflected light sensor 24 detects the first plate 14 until the point in time at which it detects the plate 34 recorded. This time is stored as the reference value T B0 .
  • the slip S can be calculated from this reference value T B0 and the time T B determined at a later time according to the relationship B4 in FIG.
  • the drive roller 12, the pulleys 28, 32 and the toothed belt 30 each have essentially integral numbers of revolutions, the periodic runout errors in each case cannot influence the result determined for the slip S. Even if the slip causes the drive roller 12, the pulleys 28, 32 and the toothed belt 30 to have turned slightly after the time T B , the influence of this error on the value for the slip S determined according to the method described above is comparatively low. A statistical evaluation with multiple determination of the slip S and subsequent averaging can thereby be avoided.
  • FIG. 6 shows another embodiment of the invention.
  • the same elements have the same reference numbers again as in Figure 1.
  • a clock disk 36 is here in contact with the carrier 10 and becomes frictional driven by this to a rotary movement.
  • the clock disk 36 has a number distributed on its outer circumference of slots, of which only for the sake of clarity some shown along a pitch circle in the figure are.
  • a Transmitted light sensor 38 arranged with a signal line 40 is connected to the control device 22.
  • ⁇ B is the path by which the carrier 10 moves forward in the time T B.
  • Figure 7 shows the two pulse sequences of the embodiment according to Figure 6.
  • the pulse train of the magnetic sensor 18 shown. It is on the abscissa Time t and the voltage V are plotted on the ordinate.
  • the time between two consecutive electrical Pulses are calculated as in the exemplary embodiment according to Figure 1 according to the relationship B1 in Figure 4.
  • FIG. 7 shows the pulse sequence of the transmitted light sensor 38, where on the abscissa time t and on the Ordinate the voltage V is plotted.
  • control device 22 does not need to measure time. Rather, it is sufficient to count the number n of electrical impulses of the transmitted light barrier 38 during the time T W of one revolution of the drive roller.
  • the slip can be calculated from this number n according to the relationship B6 in FIG. 4.
  • the number n can be determined in a state without slip and stored as a reference value n 0 .
  • the slip is calculated at a later point in time according to the relationship B7 in FIG. 4.
  • the path ⁇ B by which the carrier 10 moves forward in the time T B need not be known.
  • a device for monitoring can be particularly advantageous the transport of a band-shaped carrier after the Use the invention in a printing or copying machine, such as it is specified in WO 98/39691.
  • FIG. 8 shows another embodiment of the invention, same reference numerals for the same elements have as in the examples described above.
  • a cleaning device 42 In the direction of movement of the carrier 10 behind the Reflected light sensor 24 is a cleaning device 42 and a writing device 44 is arranged on the carrier 10.
  • the carrier 10 is a photoconductor tape
  • the Writing device 44 e.g. a laser or an LED character generator to create a latent image on the photoconductor belt his.
  • the cleaning device 42 then has e.g. a brush, roller and / or cleaning corotron.
  • a timing disk 46 is so on the motor of the pulley 32 attached that this from the engine to a rotary motion is driven.
  • There is a transmitted light sensor on the clock disk 46 48 provided with a signal line 50 is connected to the control device.
  • the engine itself is also connected to the control device with a signal line 52 22 connected.
  • the motor With each revolution of the drive roller 12, the motor generates an electrical pulse which is passed on to the control device 22 via the signal line 52. With each of these pulses, the writing device 44 writes a toner mark on the carrier 10, which then rotates on the carrier 10 at the speed V B.
  • the reflected light sensor 24 detects the toner mark and generates an electrical pulse as it passes, which is transmitted with the signal line 26 to the control device 22. After the toner mark has passed the reflected light sensor 24, it is removed from the carrier 10 again by the cleaning device 42.
  • Figure 9 shows the three pulse sequences generated in the embodiment of Figure 8.
  • the first pulse sequence generated by the motor is shown at the top in FIG.
  • the time t is plotted on the abscissa and the voltage V is plotted on the ordinate.
  • the time interval between two successive electrical pulses of the first pulse sequence is T W1 . It is calculated according to the relationship B8 in FIG. 4.
  • the pulse sequence is shown which the reflected light sensor 24 generates.
  • the voltage V is plotted on the ordinate against the time t on the abscissa.
  • the time interval between two successive electrical pulses of this second pulse sequence is also T W1 .
  • the time T BM from writing the toner mark on the carrier 10 until it is detected by the reflected light sensor 24 can be determined from the relationship B9 in FIG. 4.
  • a B is the path that the toner mark on the carrier 10 has traveled from the time of writing on the writing device 44 to the time of detection on the reflex light barrier 24.
  • the third pulse sequence generated by the clock wheel 46 is shown at the bottom in FIG. 9, the time t being plotted on the abscissa and the voltage V being plotted on the ordinate.
  • the time interval T W2 between two successive pulses of this third pulse sequence fulfills the relationship B10 in FIG. 4, where ⁇ W is the path by which the circumference of the drive roller 12 has rolled off in the time T W2 .
  • FIG. 10 shows the sequence of a method with which the control device 22 in the exemplary embodiment according to FIG. 8 determines the slip between the drive roller 12 and the carrier 10.
  • the process is started in step S20.
  • the parameters required for the further sequence are then entered using a keyboard in method step S22. Similar to the process sequence shown in FIG. 3, the diameter d of the drive roller 12 and the number N of repetitions are entered for the subsequent averaging.
  • the path a B is entered, which the toner mark covers from the time of writing to the time of detection.
  • step S24 the writing device 44 when an electrical pulse of the first pulse sequence arrives from the motor to write a toner mark on causes the carrier 10.
  • a counter n set to the value "0".
  • step S26 becomes the counter n upon arrival of an electrical one Pulse generated by the transmitted light sensor 48 third pulse train set to the value "n + 1".
  • step S28 It is then checked in step S28 whether the Toner mark already generated in step S24 is an electrical one Pulse of the second pulse train at the reflex light barrier 24 has triggered. If not, it will branches back to step S26. As soon as Step S28 detects that the toner mark on the reflex sensor 24, method step S30 follows. In this is the slip S using the relationship B11 in Figure 4 calculated from the value of the counter n.
  • the slip for the exemplary embodiment according to FIG. 8 is determined by simply counting the clock wheel pulses during the respective time T BM , without an absolute time measurement being required.
  • the slip can be determined even more easily here if the number n of clock wheel pulses during a time T BM is determined in a state without slip and stored as a reference value n 0 at a previous point in time.
  • the slip at this later point in time can then be determined from the number n determined at a later point in time using the relationship B12 in FIG.
  • Figure 11 shows an embodiment similar to that of Figure 1.
  • the same elements have the same reference numerals like there.
  • the only difference is that a carrier 54 is different when the carrier 10 is not closed.
  • Figure 12 shows a further embodiment, which in essentially the same as in FIG. 6. Have here too same elements same reference numerals and the difference is that as in the embodiment according to Figure 11, the non-closed support 54 is used. Function and slip determination correspond to that in FIG. 6 shown embodiment.
  • FIG. 14 shows an electrographic printing device, in which an embodiment of the invention is used becomes.
  • the printing device has a first printing unit 60 and a second printing unit 62, which face away from each other Surfaces of a paper web 64 are arranged.
  • the paper web 64 is driven by a drive roller in the Arrow A indicated direction moved forward. she can also be pulled back by the drive roller, to e.g. to implement a defined restart.
  • a fixing station 66 and a cooler 68 In the forward direction behind the printing units 60, 62 are a fixing station 66 and a cooler 68 in that order arranged along the paper web 64.
  • the first printing unit 60 has a first photoconductor band 70, that runs over rollers and is in one by an arrow indicated direction moves.
  • a first character generator 72 On the first photoconductor tape 70 is a first character generator 72 and five developer stations 74 arranged.
  • the first photoconductor tape 70 also protrudes Rolled first transfer belt 78 in contact, the moves in the direction of the arrow.
  • a second transfer location 80 stands the first transfer belt 78 with the one in FIG 14 upper surface of the paper web 64 in contact.
  • the second printing unit 62 is similar to the first printing unit 60 built. It has a second photoconductor tape 82 a second character generator 84 and also five developer stations 86, the second photoconductor band 82 moves in the direction of the arrow and at a third transfer location 88 in contact with a second transfer belt 90 stands. This moves in the direction indicated by an arrow Direction and is at a fourth transfer location 92 with the lower surface of the paper web 64 in FIG. 14 Contact.
  • the first character generator 70 applies to the first photoconductor belt 70 72 a latent charge image by means of laser diodes applied. This charge image is from one of the Developer stations 74 colored with toner. The toner image is at the first transfer location 76 on the first transfer belt 78 reprinted. At the second transfer location 80 the toner image is printed onto the paper web 64 and in the fixing station 66 fixed. The one heated up by fixing Paper web 64 is then in the cooling device 68 cooled.
  • the second printing unit 62 performs a similar printing process out. So at the second and fourth transfer location 80, 92 the front and the back to each other correctly can be positioned is on the two photoconductor tapes 70, 82 and on the two transfer belts 78, 90 one device each for monitoring the transport according to one of the aforementioned embodiments intended. With its help, the slip of each Determine band 70, 82, 78, 90, and depending on it can e.g. the printing operation when exceeding or falling below of a limit value can be interrupted. The Speed of the respective drive roller or Time of generation of a latent image by a the character generators 72, 84 can be dependent on the respective certain slip can be controlled.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Controlling Sheets Or Webs (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Claims (15)

  1. Dispositif de surveillance du défilement d'un support en forme de bande dans un appareil d'impression, dans lequel :
    un rouleau d'entraínement (12) entraíne un support (10, 54) en forme de bande par friction au niveau de sa périphérie,
    le mouvement de rotation du rouleau d'entraínement (12) est représenté par un premier capteur (18, 48) sous la forme d'un premier train d'impulsions électriques,
    l'avancement du support (10, 54) est représenté par un deuxième capteur (24, 38) sous la forme d'un deuxième train d'impulsions électriques,
    l'écart temporel (TW, TB, TW1, TW2) entre deux impulsions du train d'impulsions respectif correspond à un angle de rotation, resp. une distance, parcouru déterminé,
    un dispositif de commande (22) détermine le rapport des écarts temporels (TW, TB, TW1, TW2) entre le premier train d'impulsions et le deuxième train d'impulsions,
       et dans lequel une action commandée est réalisée sur la fonction d'impression en fonction de ce rapport.
  2. Dispositif selon la revendication 1, caractérisé en ce que le glissement est réglé à une valeur minimale lors d'un processus de mesure, le dispositif de commande (22) recevant lors de la mesure une valeur de référence (TB0) pour le deuxième train d'impulsions électriques.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le glissement est déterminé par la commande à partir du rapport des écarts temporels (TW, TB, TW1, TW2) des trains d'impulsions.
  4. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le premier capteur (18, 48) génère au moins une impulsion électrique à chaque révolution du rouleau d'entraínement (12).
  5. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le deuxième capteur (24, 38) génère au moins une impulsion électrique à chaque révolution du support (10).
  6. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'au moins un repère (14, 34) est placé sur le support (10, 54), le deuxième capteur (24, 38) détectant le passage du repère (14, 34) et générant une impulsion électrique lors de la détection.
  7. Dispositif selon la revendication 6, caractérisé en ce que le repère est généré par une unité de génération d'images (44) sur le support (10, 54).
  8. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'un disque de synchronisation (36, 46) génère au moins l'un des trains d'impulsions.
  9. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le capteur est un capteur reflex (24).
  10. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'au moins deux repères (14, 34) sont placés sur le support (10, 54), en ce qu'un entraínement est prévu pour le rouleau d'entraínement (12), et en ce que les repères (14, 34) sont à une distance telle que l'entraínement se trouve de nouveau dans la même position lorsque le support (10, 54) a avancé d'une distance correspondant à l'écart entre les repères (14, 54).
  11. Dispositif selon la revendication 10, caractérisé en ce que :
    l'entraínement comporte un moteur, une première poulie (32), une deuxième poulie (28) et une courroie crantée (30),
    la première poulie (32) est placée sur le moteur,
    la deuxième poulie (28) est placée sur le rouleau d'entraínement (12),
    la première poulie (32) est reliée à la deuxième poulie (28) via la courroie crantée (30), les éléments de l'entraínement se retrouvent dans la même position les uns par rapport aux autres lorsque le rouleau d'entraínement (12) a effectué un nombre de révolutions tel que l'écart est un multiple de sa circonférence.
  12. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le support (10, 54) en forme de bande est une bande sans fin.
  13. Dispositif selon l'une des revendications 1 à 12, caractérisé en ce que le support (10, 54) est une bande photoconductrice (70, 82) ou bien une bande de transfert (78, 90), qui supporte des images formées par du toner qui sont reproduites sur un matériau de support (64).
  14. Dispositif de surveillance du défilement d'un support en forme de bande dans un appareil d'impression, dans lequel :
    un rouleau d'entraínement (12) entraíne un support (10, 54) en forme de bande par friction au niveau de sa périphérie,
    l'avancement du support (10, 54) est représenté par un capteur (24, 38) sous la forme d'un train d'impulsions électriques,
    l'écart temporel (TB) entre deux impulsions du train d'impulsions correspond à un angle de rotation, resp. une distance, parcouru déterminé,
    le glissement est réglé à une valeur minimale lors d'un processus de mesure, le dispositif de commande (22) recevant lors de la mesure une valeur de référence (TB0) pour le train d'impulsions électriques,
    un dispositif de commande (22) détermine le rapport entre l'écart temporel (TB) du train d'impulsions et la valeur de référence (TB0).
  15. Dispositif selon la revendication 14, caractérisé en ce qu'une action commandée est réalisée sur la fonction d'impression en fonction de ce rapport.
EP99962204A 1998-12-04 1999-12-02 Dispositif pour surveiller le transport d'un support Expired - Lifetime EP1151355B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19856146 1998-12-04
DE19856146 1998-12-04
PCT/EP1999/009436 WO2000034832A1 (fr) 1998-12-04 1999-12-02 Dispositif pour surveiller le transport d'un support

Publications (2)

Publication Number Publication Date
EP1151355A1 EP1151355A1 (fr) 2001-11-07
EP1151355B1 true EP1151355B1 (fr) 2004-01-14

Family

ID=7890079

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99962204A Expired - Lifetime EP1151355B1 (fr) 1998-12-04 1999-12-02 Dispositif pour surveiller le transport d'un support

Country Status (4)

Country Link
EP (1) EP1151355B1 (fr)
JP (1) JP2002532740A (fr)
DE (1) DE59908324D1 (fr)
WO (1) WO2000034832A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10143844B4 (de) 2000-09-22 2017-03-30 Prüftechnik Dieter Busch AG Einrichtung zur Überwachung von Kupplungen an Schiffsantrieben

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5272492A (en) * 1992-12-01 1993-12-21 Xerox Corporation Compensation of magnification mismatch in single pass color printers
JPH0876546A (ja) * 1994-09-08 1996-03-22 Fuji Xerox Co Ltd カラー画像形成装置
JP3344614B2 (ja) * 1995-12-27 2002-11-11 富士ゼロックス株式会社 ベルト搬送装置
JPH10232566A (ja) * 1997-02-19 1998-09-02 Canon Inc 画像形成装置
JP3079076B2 (ja) * 1997-03-19 2000-08-21 富士通株式会社 画像形成装置
JPH10274888A (ja) * 1997-03-31 1998-10-13 Canon Inc 画像形成装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10143844B4 (de) 2000-09-22 2017-03-30 Prüftechnik Dieter Busch AG Einrichtung zur Überwachung von Kupplungen an Schiffsantrieben

Also Published As

Publication number Publication date
DE59908324D1 (de) 2004-02-19
JP2002532740A (ja) 2002-10-02
EP1151355A1 (fr) 2001-11-07
WO2000034832A1 (fr) 2000-06-15

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