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EP0890140B1 - Procede et circuit pour l'impression d'une image imprimee - Google Patents

Procede et circuit pour l'impression d'une image imprimee Download PDF

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Publication number
EP0890140B1
EP0890140B1 EP97920556A EP97920556A EP0890140B1 EP 0890140 B1 EP0890140 B1 EP 0890140B1 EP 97920556 A EP97920556 A EP 97920556A EP 97920556 A EP97920556 A EP 97920556A EP 0890140 B1 EP0890140 B1 EP 0890140B1
Authority
EP
European Patent Office
Prior art keywords
frequency
carrier material
printing
divider
value
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
EP97920556A
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German (de)
English (en)
Other versions
EP0890140A1 (fr
Inventor
Georg Coufal
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 EP0890140A1 publication Critical patent/EP0890140A1/fr
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Publication of EP0890140B1 publication Critical patent/EP0890140B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6517—Apparatus for continuous web copy material of plain paper, e.g. supply rolls; Roll holders therefor
    • G03G15/6526—Computer form folded [CFF] continuous web, e.g. having sprocket holes or perforations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6529—Transporting

Definitions

  • the invention relates to a method for printing a print image on an endless carrier material with respect to a predetermined Position in an electrographic printer.
  • Electrographic printers in which a motor is known a transport device drives the carrier material a transfer station essentially according to a predetermined Print speed transported past.
  • a print controller in succession at the transfer station at the printing speed the substrate is printed.
  • Transfers the transport device a forward movement by positive locking on the carrier material, as it e.g. when engaging transport spikes in Transport holes one perforated in the edge areas Backing material is the case, so is within certain limits a forced run between the carrier material and the transport device realized.
  • the transport device transmits the forward movement by frictional engagement on the carrier material by a rubberized transport roller or a conveyor belt with the Carrier material are in frictional contact, so it will a forced run between carrier material and transport roller or Conveyor belt prevented by various factors.
  • these influencing factors is the micro-slip, which causes occurs that the frictional connection between the drive roller and Backing material is not 100% guaranteed.
  • On another influencing factor lies in the mechanical tolerances in the manufacture of the drive roller and in its storage in the transport device. A forced run between carrier material and drive roller thus does not take place. Since the Transport speed of the carrier material is therefore never completely matches the speed of the drive roller, is a synchronization between carrier material and Printing process excluded.
  • the object of the invention is a simple, digital solution for printing on continuous carrier material, which specify a offset-free printing with respect to a given position allows.
  • This task is accomplished by a process with the characteristics of Claim 1 solved.
  • the invention is based on knowledge from that with a substantially constant transport speed of the carrier material, the offset cumulatively from Print image is enlarged to print image. To offset Accordingly, only minimal changes in speed are to be corrected the transport speed of the carrier material necessary. The transport speed can therefore despite slight fluctuations as a reference for a measurement of the offset can be used.
  • a signal pickup is fixed with respect to attached to the transfer printing station, which when capturing a marking generates a marker signal.
  • a marker signal In case of an offset lying in front of the signal sensor in the transport direction To move markings on the signal pickup or from remove this if consecutive snapshots too Times with active print image start signal considered depending on whether the transport speed of the Backing slightly larger or slightly smaller than that Printing speed is.
  • the print image start signal occurs, a Counting of clock signals in a counter started.
  • the Counting is started when the next marker signal occurs interrupted at the signal sensor.
  • the counting result is there in a ratio determined by the clock signals Time the next mark to the transducer needs. From this time, multiplication with the Print speed the distance of the marker from the transducer at the time of the print image start signal be calculated. In particular, when there is a change this distance from print image to print image an offset be recognized.
  • the counter result is with compared to a setpoint that corresponds to a counter reading with an offset-free Positioning of the printed images in relation to the marking equivalent.
  • Both the counter and the stepper motor control can digitally executed. There is a microprocessor in the printer is available, the comparison can also be easily carried out digitally become. In the invention need to synchronize the transport speed of the carrier material and the Print speed just a counter and a slightly modified one Pulse control for the stepper motor can be used.
  • markings e.g. the transport holes of the carrier material or a cross perforation, if present serve at the beginning and end of a printed page, so that also no additional effort arises from the markings.
  • Carrier material is offset-free printing only required if the carrier material already before Printing e.g. through offset printing with pre-printed forms is printed. The additional effort required to apply the Markings in offset printing is also low because of the Markings are printed at the same time as the forms become.
  • a pulse generator contains a divider and a frequency multiplier, where the divider on the input side with a basic clock of the basic frequency is clocked and outputs an output pulse train that has a frequency determined by the ratio of fundamental frequency and a divisor value determined by the comparison result is defined.
  • the frequency multiplier multiplies the Frequency of the output pulse train by an integer value and outputs the control pulse train. This measure will achieved that the positioning accuracy is increased, because the Reaching e.g. co-determined by the transport device Stepper motor higher operating frequency range Divider values are necessary than without using a frequency multiplier. With higher divisors, the result is the subsequent frequency multiplication per division value step, i.e. an increase or a decrease by one, minor frequency changes in the specified frequency working range. Smaller frequency changes have the consequence that too the carrier material is only moved by small distances, so that even a small offset can be corrected.
  • the invention further relates to a circuit arrangement the features of claim 9.
  • the circuit arrangement serves to carry out the method according to the invention, so that the above effects also affect the circuitry transfer.
  • FIG. 1 shows a schematic diagram of an electrographic Printer 10 and a block diagram of essential electrical Functional units for controlling a stepper motor 12.
  • the Printer 10 has one through stepper motor 12 via a shaft 13 driven transport device 14, which is close to a Transfer station 16 is arranged and endless carrier material 20 at the transfer station 16 essentially according to a predetermined one Printing speed VD transported past.
  • the Transfer station 16 becomes one on a photoconductor drum 18 applied charge image colored with toner by means of a corona device (not shown) on the endless carrier material 20 transferred.
  • the photoconductor drum 18 rotates itself in the direction of arrow 22. After the transfer Remnants of the toner are removed and the surface of the Photoconductor drum 18 rotates on an exposure line 24 over, which exposes the photoconductor drum 18 again.
  • Transport direction seen in front of the transfer station 12 is one arranged first deflection unit 30, the carrier material 20th to the transfer station 16.
  • a second deflection unit 32 is seen in the transport direction after the fixing station 26 arranged. This second deflection unit 32 stacks the printed one Carrier material 20 on a stack 34.
  • the carrier material 20 gets off a stack at the start of printing 36 removed by the first deflection unit 30. Instead of both stacks 34 and 36 are also used on rolls which the carrier material 20 is rolled up.
  • the printing process is controlled by a print controller 38.
  • the print controller 38 generates the print images page by page, by adding the image information one line at a time to the exposure line 24 are transmitted via data lines 40.
  • the print images are successively at the transfer printing station 16 printed on the substrate 20 at the printing speed.
  • the frequency of the counting clock sequence ZTF is around 100 kHz.
  • Spacing marks 48 which are printed on the Carrier material 20 were printed by offset printing.
  • the markings 48 were made at the same time as the forms 50 printed on the carrier material 20 and are in a predefined position with regard to the form forms 50 arranged.
  • a light barrier 52 gropes the carrier material 20 according to the Markings 48 onwards.
  • the light barrier 52 contains a light transmitter 54 for emitting a light beam 56 and one Light receiver 58, which the light beam 56 strikes when none of the markings 48 between light transmitter 54 and light receiver 58 is.
  • the light receiver 56 contains a circuit a marker signal when a marker is detected MS generates that on a signal line 60 to the counter 44th is transmitted and interrupts the counting process in counter 44.
  • the print controller 38 also includes a microprocessor 62, the counting result after completion of the counting process reads the counter 44 via data lines 64 and with a Compare setpoint.
  • the setpoint corresponds to a counter reading with offset-free positioning of the print images with respect to of the marks 48. Free of offset means that in the Letters contained in printed images exactly in the intended Fields of the forms 50 can be printed.
  • the stepper motor 12 If there is a deviation between the counting result and the setpoint found, the stepper motor 12, the shaft 13 is rotatably connected to the transport device 14, so be controlled so that it varies depending on the direction of the deviation turns faster or slower.
  • the stepper motor 12 is driven by a current pulse sequence SIF, which by a pulse generator 66 is generated.
  • the current pulse sequence SIF is from the pulse generator 66 via a control line 68 to Transfer stepper motor 12.
  • the pulse generator 66 is on the input side with a basic clock clocked, which has a basic clock frequency of 10 MHz.
  • the Frequency of the current pulse sequence SIF is in one by one integer divisor value TW determined ratio to the fundamental frequency.
  • the divider value TW is determined by the microprocessor 62 transmitted to pulse generator 66 via data lines 72. To At the beginning of the printing process, the divider value TW is determined by the Microprocessor 62 specified so that the speed V of the carrier material 20 in the transport direction of the printing speed VD corresponds. Occur during printing Differences between the speed V and the printing speed VD e.g. by micro-slip of a drive roller the transport device 14 on the carrier material 20, so the counting result will deviate from the target value.
  • the divisor value TW is increased by the microprocessor 62 when the speed V is greater than the printing speed VD.
  • the markings 48 are in the transport direction in this case 28 are offset from the printed image.
  • the divisor value TW is reduced by the microprocessor 62 when the Markings 48 in the transport direction 28 compared to the printed images are set back.
  • the pressure controller 38 is connected to a via data lines 74 Input / output device 76 connected, e.g. the printing speed VD can be specified by an operator can.
  • Figure 2 shows three positional relationships between the light barrier 52 and marks 48a, 48b, 48c on the substrate 20 are applied.
  • each in FIG Shown snapshots of a location of the markings 48a, 48b and 48c each at the start of printing a printed page correspond, exactly at the moment when that Top of page signal signals the start of a new print page.
  • Part a of Figure 2 shows a marking 48a, which is at the beginning a new print page by distance S1 from the light barrier 52 is removed.
  • the instantaneous speed V des Carrier material 20 corresponds essentially to the printing speed VD.
  • the instantaneous speed practically gives way V only by a maximum of a few thousandths of the printing speed VD, so that the instantaneous speed V at determining the distance between mark 48a and Light barrier 52 at the time of a new top of the page as is considered constant.
  • the counter 44 is started at the beginning of the new print page and interrupted when the mark 48a the light beam 56th interrupts, the counting result corresponds to a time t1, which the marking 48a needs to run through the distance s1.
  • the microprocessor can determine the length of the path s1 calculate by taking the assumed instantaneous speed V multiplied by time t1. In the case of part a of the figure 2, the microprocessor determines that the path s1 is accurate corresponds to a desired distance s0, which ensures that the Print images are aligned with respect to the markings 48. The printed image near the marking 48a also becomes special be aligned with this marker.
  • Part b of Figure 2 shows the case that at the time of Start of printing a page a stretch S2 between one Mark 48b and the light barrier 52 is present.
  • the The counting result in case b is higher than the counting result in the case a, since the assumed instantaneous speed V is constant is viewed and a larger distance s2 has to be covered.
  • the microprocessor 22 calculates the distance s2 by the Instantaneous speed V with an increased counting result corresponding time t2 multiplied. So the microprocessor 62 find that the distance s2 is greater than that Target distance s0 is.
  • the marking 48b lies in the transport direction or a dashed line 80, which is an end point of the Represents target distance s0.
  • the other end point of the target route s0 is the light barrier 52.
  • the microprocessor is used for correction 62 increase the partial value TW in the pulse generator 66.
  • Part c of Figure 2 shows the case that a distance s3 between a marker 48c and the light barrier 52 for Time of printing start of a page smaller than the target distance s0 is.
  • the marking 48c lies in the transport direction behind the dashed line 80.
  • the counting result in the counter 44 in case c is below the setpoint.
  • the microprocessor 62 determines the length of the line s3 by in turn the assumed instantaneous speed V with the count result, that corresponds to a time t3, multiplied.
  • the markings 48 are ahead of the printed images in case c.
  • the mark So 48c is near one with respect to one the printed image in the transport direction. to Correction, the microprocessor 62 will decrease the divider value TW.
  • Figure 3 shows three variants I to III for generating the Current pulse sequence SIF for the stepper motor 12 in the pulse generator 66th
  • Part a of Figure 3 shows a first embodiment of the Pulse generator 66.
  • the pulse generator 66 contains a divider 90, the input side with the basic clock on the basic clock line 70 is clocked and in the over the data lines 72 of the Divider value TW is saved.
  • the output of the divider 90 is connected directly to the control line 68. So that is Frequency of the current pulse sequence SIF from the ratio Basic frequency and divisor value TW defined.
  • Part b of Figure 3 shows a second embodiment a pulse generator 66 ', which instead of the pulse generator 66 is used.
  • An output pulse train AIF of the divider 90 ' is on the input side via a data line 92 connected to a frequency doubler 94.
  • the frequency doubler 94 doubles the frequency of the output pulse train AIF and generated on the output side on the control line 68 the current pulse sequence SIF.
  • Part c of Figure 3 shows a third variant III for production the current pulse sequence SIF, in which the pulse generator 66 ' is used.
  • the time interval is used for fine positioning between two successive comparisons of the Microprocessor 62 divided into two periods. in the in the first period a divisor value TW1 in divisor 90 ' is saved and a divisor value is created in the second time interval TW2 stored in divider 90 '. How the variant works III is also explained below with reference to FIG. 4.
  • FIG. 4 shows the frequency dependence in a diagram the current pulse sequence SIF the size of the divisor value TW in Pulse generator 66 or 66 '.
  • 100 is the Divisor value TW deducted. Numbers refer to curly brackets to a base clock frequency of 1 MHz, Numbers without brackets on a basic clock frequency of 10 MHz and numbers in square brackets to a base clock frequency of 100 MHz. The frequency is on the ordinate axis 102 Current pulse sequence SIF in Hertz.
  • a curve 104 represents the relationship between the divisor value TW and the frequency of the current pulse sequence SIF for variant I.
  • the frequency of the current pulse train is SIF at a base clock frequency of 10 MHz and a divider value TW of 2000 at a point P1 5000 Hz. Since the divisor value TW can only take integer values, there is a curve 104 from a sequence of points. The higher the base clock frequency is, the more points are between two given Points, e.g. P1 and P2 of curve shape 104. In the exemplary embodiment became, as already mentioned, a basic clock frequency selected from 10 MHz. This is a compromise between circuit complexity and the distance between two neighboring ones Points on the curve profile 104.
  • FIG. 3 there is a curve 106 the relationship between the divider value TW and the basic clock frequency ago.
  • the divisor value must be used to set the same frequency of the current pulse train SIF twice as high be as in variant I.
  • a point P1 ' is a divisor TW of 4000 and a frequency of the current pulse train SIF assigned from 5000 Hz.
  • a point P2 ' is a divisor value TW of 6000 and a frequency of the current pulse train of 3333 Hz assigned.
  • There are double between points P1 'and P2' as many points on the curve profile 106 as between the Points P1 and P2 on the curve 104.
  • Variant III of FIG. 3 is based on curve shape 106 off, however, the resolution compared to variant II increased again by the integer divisor value TW thus predetermined frequency jump of the current pulse sequence SIF is weakened that only an absolutely necessary Part of the frequency hopping for the correction of the position of the Markings 48 takes effect against the printed image.
  • the Principle of variant III can of course also in a variant IV can be used in the pulse generator 66.
  • FIG. 5 shows a time profile 110 of the start of page signal SAS, a time course 112 of the marker signal MS and a time course 114 of a count signal ZS. Furthermore, in Figure 5 shows part of a time line 116, which as Reference variable for the time profiles 110 to 114 is used.
  • a Time ZP1 is determined by a voltage pulse I1 of the start of page signal SAS the voltage value of the count signal ZS increased, whereby the counting process in the counter 44 is started.
  • a voltage pulse I2 of Marking signal MS is by a voltage pulse I2 of Marking signal MS the count signal ZS to a lower Voltage value switched, causing the counting process in the counter 44 is stopped.
  • the microprocessor 62 determines from the count result in the counter 44 depending on variant I, II, III or IV a new divisor value TW1 and stores it in divider 90 or 90 'if it is from Divider value TW0 deviates. In variants III and IV after a predetermined time t4, a divisor value TW2 in the Divider 90 'stored. At a time ZP3 is through the Pressure control 38 a voltage pulse I3 of the top of the page signal SAS creates a new one as described above Initiates counting. After completing this counting process a divisor value TW3 is stored in the counter 90 or 90 '.
  • FIG. 6 shows a flow diagram of the method for non-offset Printing the printed images with respect to the marks 48.
  • the method begins in a step 200 with an initialization phase from steps 202 and 204.
  • the divider 90 or 90 ' is initialized with a divisor value TW, at a speed V of the carrier material 20 leads, which corresponds approximately to the printing speed VD.
  • TW divisor value
  • the carrier material 20 becomes in the transport direction 28 aligned so that the markings 48 on a ruler so that the first Print images have no offset with respect to the marks 48 to have.
  • the microprocessor 62 waits until on first counting in counter 44 is completed.
  • step 206 the microprocessor 62 reads the count result from the counter 44 and determines in one step 208 a new divisor in the case of variants I and II or two new divisor values TW in the case of variants III and IV.
  • step 210 the divider value TW1 is over the data lines 72 transferred to the divider 90 or 90 '.
  • a step 212 the microprocessor 62 checks whether the Variants III or IV are active. If this is not the case, then the method is continued in a step 218. Is the Variant III or IV is active, the microprocessor 62 is waiting in a step 214 until a time calculated in step 208 is over, then in a step 216 the second Divider value TW2 to divider 90 or 90 'to be transmitted. Subsequently the method continues in step 218, in which the microprocessor 62 is waiting for a new count result. If there is a new counting result, the microprocessor checks 62 in a method step 220 whether the printing has ended shall be. If this is not the case, the procedure continued in a loop from steps 206 to 220. In step 220, the microprocessor 62 determines that the print is to be ended, he ends the process in a step 222.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Or Security For Electrophotography (AREA)
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Claims (9)

  1. Procédé d'impression d'une image d'impression sur une matière de support sans fin (20) en référence à une position prédéterminée dans un appareil d'impression électrographique (10), dans lequel :
    un moteur pas-à-pas (12) commandé par un train d'impulsions de courant (SIF) entraíne par friction ou correspondance de formes un dispositif de défilement (14), entraínant la matière de support (20), qui fait défiler la matière de support (20) devant une station de reproduction (16) sensiblement à une vitesse d'impression (VD) prédéterminée,
    pendant le processus d'impression, des images d'impression générées par une commande d'impression (62) sont imprimées successivement sur la matière de support (20) au niveau de la station de reproduction (16) à la vitesse d'impression (VD),
    la commande d'impression (62) génère, au début de l'impression d'une image d'impression, un signal de début d'image d'impression (SAS) qui démarre un processus de comptage d'impulsions d'horloge (ZTF) dans un compteur (64),
    un récepteur de signal (58) détecte la matière de support (20) en fonction de repères (48) qui sont présents à des intervalles réguliers, en vue de positionner les images d'impression dans le sens de défilement (28), le récepteur de signal (58) générant un signal de repérage (115) lors de la détection d'un repère (48),
    le processus de comptage est interrompu lors de l'apparition du signal de repérage (115), ou après l'apparition d'un nombre fixé de signaux de repérage (115),
    le résultat du compteur est comparé avec une valeur théorique (étape 208) qui correspond à un état du compteur lorsque les images d'impression sont positionnées sans décalage par rapport aux repères (48),
    et dans lequel la fréquence du train d'impulsions de courant (SIF) est réglée en fonction du résultat de la comparaison (étapes 210, 216).
  2. Procédé selon la revendication 1, caractérisé en ce que le dispositif de défilement (14) communique, par adhérence à la matière de support (20) en au moins un endroit, un mouvement en avant dans le sens de défilement (28).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la fréquence du train d'impulsions de courant (SIF) est générée par un générateur d'impulsions (66), synchronisé avec une fréquence de récurrence, qui délivre en sortie le trains d'impulsions (SIF) à une fréquence dont le rapport avec la fréquence de récurrence est une valeur de division entière (TW).
  4. Procédé selon la revendication 3, caractérisé en ce que la valeur de division (TW) est déterminée en fonction du résultat de la comparaison.
  5. Procédé selon la revendication 3 ou 4, caractérisé en ce que le générateur d'impulsions (66, 66') contient un diviseur (90) qui est synchronisé en entrée avec la fréquence de récurrence (GTF), et en ce que le diviseur délivre le train d'impulsions de courant (SIF) à une fréquence qui est définie par le rapport entre la fréquence de récurrence et la valeur de division (TW) .
  6. Procédé selon la revendication 3 ou 4, caractérisé en ce que le générateur d'impulsions (66') contient un diviseur (90') et un multiplicateur de fréquence (94), le diviseur (90') étant synchronisé en entrée avec la fréquence de récurrence (GTF) et délivrant un train d'impulsions de sortie (AIF) dont la fréquence est définie par le rapport entre la fréquence de récurrence (GTF) et la valeur de division (TW), le multiplicateur de fréquence (90') multipliant la fréquence du train d'impulsions de sortie (AIF) par une valeur entière, de préférence par la valeur deux, et le multiplicateur de fréquence (90') délivrant le train d'impulsions de commande (SIF).
  7. Procédé selon l'une des revendications 4 à 6, caractérisé en ce qu'un intervalle de temps (ZP2 à ZP4) entre deux comparaisons successives est divisé en au moins deux périodes, et en ce qu'une valeur de division (TW1, TW2) est associée à chacune des périodes.
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que les repères (48) ont été imprimés sur la matière de support (20) avant le début du processus d'impression.
  9. Ensemble de circuit destiné à imprimer une image d'impression sur une matière de support sans fin (20) en référence à une position prédéterminée dans un appareil d'impression électrographique (10), comportant :
    un générateur d'impulsions (66, 66') destiné à générer un train d'impulsions (SIF) de fréquence prédéterminée conformément à un paramètre,
    un moteur pas-à-pas (12) commandé par le train d'impulsions (SIF) de fréquence prédéterminée, et destiné à entraíner un dispositif de défilement (14) qui fait défiler la matière de support (20) devant une station de reproduction (16) sensiblement à une vitesse d'impression prédéterminée (V),
    une commande (62) destinée à générer les images d'impression qui sont imprimées successivement à la vitesse d'impression (V) sur la matière d'impression (20) au niveau de la station de reproduction (16),
    un récepteur de signal (58) destiné à détecter la matière de support (20) en fonction de repères (48) qui sont présents à des intervalles réguliers sur le support d'impression (20), en vue de positionner les images d'impression dans le sens de défilement (28), le récepteur de signal (58) étant conformé de telle sorte qu'il génère un signal de repérage (115) lors de la détection d'un repère (48),
    un compteur (44) qui est conformé de telle sorte qu'il démarre un processus de comptage d'impulsions d'horloge (ZTF) au moyen d'un signal de début d'image d'impression (SAS) qui est généré par la commande (62) au début de l'impression d'une image d'impression, et qu'il interrompt le processus de comptage lors de l'apparition du signal de repérage (48), ou après l'apparition d'un nombre fixé de signaux de repérage (48),
    la commande (62) étant conformée de telle sorte que le résultat du compteur est comparé à une valeur théorique (étape 208) qui correspond à l'état du compteur lorsque les images d'impression sont positionnées sans décalage par rapport aux repères (48), et règle un paramètre dans le générateur d'impulsions en fonction du résultat de la comparaison (étapes 210, 216).
EP97920556A 1996-03-27 1997-03-26 Procede et circuit pour l'impression d'une image imprimee Expired - Lifetime EP0890140B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19612176 1996-03-27
DE19612176 1996-03-27
PCT/DE1997/000642 WO1997036211A1 (fr) 1996-03-27 1997-03-26 Procede et circuit pour l'impression d'une image imprimee

Publications (2)

Publication Number Publication Date
EP0890140A1 EP0890140A1 (fr) 1999-01-13
EP0890140B1 true EP0890140B1 (fr) 2002-12-04

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EP97920556A Expired - Lifetime EP0890140B1 (fr) 1996-03-27 1997-03-26 Procede et circuit pour l'impression d'une image imprimee

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US (1) US6164848A (fr)
EP (1) EP0890140B1 (fr)
JP (1) JP2000507170A (fr)
DE (1) DE59708889D1 (fr)
WO (1) WO1997036211A1 (fr)

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EP1030782B1 (fr) 1997-11-10 2001-05-30 Océ Printing Systems GmbH Procede et dispositif pour transporter un support d'enregistrement en forme de bande pre-imprimee dans une imprimante
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WO1997036211A1 (fr) 1997-10-02
EP0890140A1 (fr) 1999-01-13
JP2000507170A (ja) 2000-06-13
DE59708889D1 (de) 2003-01-16
US6164848A (en) 2000-12-26

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