EP1030781A1 - Procede et dispositif de transport page par page d'un support d'impression preimprime sous forme de bande dans une imprimante - Google Patents

Procede et dispositif de transport page par page d'un support d'impression preimprime sous forme de bande dans une imprimante

Info

Publication number
EP1030781A1
EP1030781A1 EP98955562A EP98955562A EP1030781A1 EP 1030781 A1 EP1030781 A1 EP 1030781A1 EP 98955562 A EP98955562 A EP 98955562A EP 98955562 A EP98955562 A EP 98955562A EP 1030781 A1 EP1030781 A1 EP 1030781A1
Authority
EP
European Patent Office
Prior art keywords
sensor
recording medium
paper
transport
length
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
EP98955562A
Other languages
German (de)
English (en)
Other versions
EP1030781B1 (fr
Inventor
Herbert Frodl
Anton STÜRZER
Holger Hofmann
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 EP1030781A1 publication Critical patent/EP1030781A1/fr
Application granted granted Critical
Publication of EP1030781B1 publication Critical patent/EP1030781B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
    • B41J15/04—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
    • B41J15/06—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles characterised by being applied to printers having stationary carriages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/36—Blanking or long feeds; Feeding to a particular line, e.g. by rotation of platen or feed roller
    • B41J11/42—Controlling printing material conveyance for accurate alignment of the printing material with the printhead; Print registering
    • B41J11/46—Controlling printing material conveyance for accurate alignment of the printing material with the printhead; Print registering by marks or formations on the paper being fed

Definitions

  • the invention relates to a method and a device for transporting pre-printed, web-shaped recording media, in particular continuous paper, in an electrographic printer. Paper, film material, labels or other materials can be used as the web-shaped recording medium.
  • edge punched paper is mainly used.
  • This paper has lateral holes on its longitudinal edges for transport and position monitoring of the paper. It is driven by caterpillars that engage in the side transport holes. Often this paper also has cross perforations along which the individual pages are separated.
  • Edge punching is used in particular when processing pre-printed paper.
  • the information subsequently applied in the electrographic printer for example data which is printed on a pre-printed form, should be located as precisely as possible at predetermined positions on the form.
  • the position of the paper web in the transport direction must be exactly on its driven or be adjusted or synchronized to the movement of the photoconductor drum.
  • the first side of the paper web is placed exactly at a specific position with respect to the tractor caterpillars.
  • a page start mark of the form or the transverse perforation specifies exactly the beginning of the page. All other pages are automatically positioned exactly due to the forced guidance by the tractor caterpillar if the first page was correctly inserted.
  • the perforated paper is generally fed in a specific grid corresponding to the hole spacing, for example in a ⁇ inch grid or in a 1/6 inch grid.
  • the paper web is then not moved continuously, but step by step by a multiple of the grid spacing.
  • a printer which is suitable for processing roll paper without perforations at the edges is described, for example, in WO 95/19929 AI.
  • a first contact edge is provided in this printer, which specifies the lateral position of the paper, as well as stabilizing rollers, a vacuum brake and a roller arrangement with a handle puller.
  • tractor-less friction drives that the transport accuracy in the feed direction cannot always be exactly maintained.
  • slip between the drive roller and the paper web or manufacturing tolerances of the drive mechanism can contribute to this.
  • a friction drive for data printers is also known from DE 19 37 699 A.
  • a scanner is provided that recognizes a mark pre-printed on the edge of the form.
  • the scanning result is used to reassign the line height to the printing point at the beginning of the form.
  • the disadvantage of this drive is that a mark adapted to the sensor must be pre-printed at a specific position on the form so that the control function can be carried out.
  • a printer is known from US Pat. No. 4,732,501 A, in which a record carrier web is transported in a loading mode at a first, slower speed. In this mode, the operator can align the web within the drive before the printer enters a print mode with a second, higher transport speed. Switching between these two speeds can be controlled by a sensor that detects an edge of the recording carrier web at a specific position.
  • no specific measures are provided in this printer for processing pre-printed recording carrier webs.
  • the object of the invention is to provide a method and a device for controlling a tractor-less drive for web-shaped recording media, with which pre-printed recording media can be transported in a precise position.
  • the invention provides for the front edge of the pre-printed, marked web of the recording medium to be placed against a predetermined insertion mark in an input area of the printer.
  • the recording carrier web is then transported by a transport motor at a first, relatively low speed along a transport direction for a predetermined length.
  • a sensor scans a predetermined area of the paper and sends scanning signals to an evaluation device. This evaluates the signals and checks whether they can be assigned to a given brand.
  • the transport length lying between two successive marks is then identified by the evaluation device as a value for one side length.
  • the printing process is initiated at a second, relatively high transport speed and controlled with the identified value for the page length.
  • the drive for the path of the recording medium is synchronized to the page length after a page feed.
  • Positional deviation The web, which occurs due to inaccurate insertion of the paper web or due to increased slippage between the drive and web, is compensated for on the first print page.
  • the invention also makes it possible to transport recording carrier webs that contain indefinite forms with precise position.
  • the forms can be indefinite, for example, with regard to their type, color, shape, size (length) or position on the recording medium.
  • the regulation only takes a negligible time to settle. Waste, ie excess unprinted paper, is largely avoided.
  • the printing takes place in the correct position within the pre-print.
  • the evaluation device comprises a memory in which at least one value for a standard page length is stored.
  • the value for a side length determined with the sensor is checked for plausibility by the evaluation device with the standard value or with the standard values before the determined value is identified as a value for the side length. This makes it possible to synchronize the drive precisely to the page length of the form even if the page length deviates from the theoretical target value.
  • the senor is sensitized to the markings and / or to the background of the markings. Furthermore, it is advantageous to arrange the sensor so that it can be moved transversely to the recording direction. The mark can then be anywhere on the form. Even parts of the form such as texts, graphics or window sections can then be used as a brand.
  • the sensor of the invention can therefore be adapted to the respective form content by being sensitized to selected information.
  • the sensor can be of an optoelectronic type; in a preferred exemplary embodiment, the sensitization takes place to specific colors of the background or of the brand.
  • the sensitization of the sensor can also take place with regard to a geometric shape of the markings or with regard to the surface structure of the recording carrier web.
  • the marks can be notches provided in paper webs or window cutouts in form templates.
  • a sensor setting value determined during the sensitization is preferably stored and reused for later measurements.
  • the sensitization of the sensor is preferably carried out by transporting the paper at least once in and against the transport direction, the evaluation device checking whether and when the sensor emits a signal during this forward and backward movement. It can be provided that several cycles of forward and backward movements are carried out and that a setting value on the sensor is changed after each cycle. The finally determined sensor setting values can then be saved and reused for later sensitization processes.
  • a self-learning system can be created by using a certain number of the most frequently and / or last used setting values at the beginning of a sensitization process.
  • the printing process can begin with the first page which follows the page required for sensitizing the sensor.
  • the procedure according to the invention can be largely automated. Operator errors when loading the paper are therefore largely excluded or can be compensated for. The process takes little time, so the effective printing time of the printer is high. Exemplary embodiments of the invention are explained in more detail below with the aid of some figures.
  • Figure 1 a printer with a tractor-less paper drive
  • Figure 2 shows a section through a drive unit
  • Figure 3 a view of the drive unit
  • Figure 5 a block diagram for controlling the drive
  • Figure 6 a flow chart for controlling the drive
  • Figure 7 a flow chart for the sensitization of the sensor.
  • the printing device shown in FIG. 1 removes a web-shaped recording medium 5 made of paper from a paper input container 1 or from a supply roll 11.
  • the paper web 5 is fed via a loop 12 to a deflection device 2 and then in a web pre-centering device 3 along a contact edge for friction - Drive rollers 4 out. Then it is pulled by a drive 8 via a vacuum brake 6, which is connected to a vacuum pump 7, which generates the vacuum.
  • the paper web 5 is braked by the negative pressure and the tensile stress of the paper web 5 is increased.
  • the higher the tension the more stable the paper web 5 runs in the transport direction A, i.e. the less it slides laterally out of the target paper transport direction.
  • the paper web 5 passes through a stabilization zone which consists of several deflection rollers 9 and a loop puller 10.
  • the paper web 5 wraps around the deflection rollers 9 by at least 180 °, as a result of which the paper web is further stabilized laterally.
  • a sensor arrangement 17 optically scans the paper 5.
  • the Sensor arrangement 17 is designed such that it can still scan the widest paper 5 that can be processed in the printer over its entire width.
  • the width of the sensor arrangement 17 is therefore adapted both to the mechanical components for paper transport and to the recording-side parameters of the printing device 14, which determine the printable width. It is particularly adapted to the width of a photoconductor drum 16.
  • the processable paper width in the present exemplary embodiment ranges from 6.5 inches (165 mm) to 19 inches (482.6 mm). Details of the sensor arrangement 17 are described in the German patent application filed by the applicant with the file number DE 197 49 676.8, the content of which is hereby incorporated by reference into the present description.
  • the paper web 5 is fed from the sensor arrangement 17 via a drive unit 13 to a transfer printing station.
  • the transfer printing station comprises a photoconductor drum 16 which interacts with a corotron device 16a.
  • the photoconductor drum 16 is exposed to information in a known manner by light, as a result of which a charge image is applied. Then it picks up a magnetized toner which is transferred to the paper web 5 in the transfer printing area.
  • the corotron device 16a then unloads the corresponding area of the photoconductor drum 16 again, so that this can be written with information again.
  • the corotron device 16a acts in a manner known per se, as described for example in EP 0 224 820 B1.
  • the sensor arrangement 17 is arranged in the area of the paper feed device 15, but it can also be provided within the printing unit 14.
  • the paper web 5 is transported in the paper transport direction A.
  • FIG. 2 shows the drive unit 13 arranged in the area of the transfer printing station or the photoconductor drum 16 of the electrophotographic printer in more detail.
  • a roller arrangement 20 presses on the drive roller 40 with a predetermined spring force.
  • the drive roller 40 is in turn connected to the stepper motor 41 via a toothed belt drive.
  • the entire drive unit 13 is flanged to a printer housing via the bearing block 44.
  • a common bearing axis 42 is mounted on the bearing block 44 by the ball bearing 43, which on the one hand absorbs the rotational movement of the drive roller 40 and on the other hand a pivoting movement of the drive elements about the pivot axis B.
  • the drive components are mounted on a support plate 47, which is connected to the bearing block 44 via a gas pressure spring 49 and via the bearing axis 42.
  • Threads 45 located in the bearing block 44 serve to receive fastening screws which are guided through the printer housing.
  • the entire Ant ⁇ ebsaggregat is adjustable via guide plates 46 within the printer housing.
  • the support plate 47 is in turn adjustable with respect to the bearing block 44, a first adjustment screw 51 and a second adjustment screw 52 being provided in the bearing block 44, against which cylinder-side cylinder pins strike.
  • the gas pressure spring 49 is connected to the carrier 47 by the screw connection 50 and to the bearing block 44 by the screw connection 48.
  • the carrier 47 and the bearing block 44 can be locked against one another with the locking device 54.
  • the paper sensor 55 scans the paper 5 over the entire width of the printable area of the photoconductor drum 16, as a result of which both the lateral paper edges and any edge perforations in the paper web 5 can be detected.
  • the paper is pressed against the surface of the photoconductor drum 16 by spring-loaded swivel jaws 56.
  • a known electrical corotron device 57 generates a high voltage, by means of which the toner located on the photoconductor drum 16 is drawn towards the paper.
  • Deflection rollers 58 continue to guide the paper 5 to a mark sensor 59, which detects any printing or cutting marks 109 present on the paper web 5.
  • Grounded electrical connections 61 dissipate any residual electrical charges located on the paper 5.
  • edge punched paper 5 is transported with the paper transport, the edge perforation can be scanned with a spike wheel 60.
  • Figure 3 shows the paper drive 13 in a three-dimensional representation. This shows in particular the cylinder pin 66 mounted on the carrier plate 47, which cooperates with the adjustment screw 52 screwed into the bearing block 44, and the screw connection 50 of the gas pressure spring 49.
  • the paper 5 is guided by a guide surface 69 above the deflecting rollers 58. In this area, the paper 5 is also scanned with the mark sensor 59. Furthermore, in this area an attachment ruler 65 is provided, which is used for starting the printer. Newly inserted paper 5, which has edge perforations, is placed with a top of a mark 65a of the ruler 65 corresponding to the side length, the edge perforation is brought into engagement with the pivoted barbed wire 60, and the printing process is initiated.
  • the spike wheel 60 is part of a sensor arrangement, which is described in more detail in FIG.
  • a drive motor 68 pulls a corotron wire corresponding to the page width to be printed from the corotron wire cassette 57.
  • the mark sensor 59 can be displaced in the direction E along a rod 73.
  • a sheet metal covers the drive motor 41 and is used in particular for electromagnetic shielding.
  • a rear bearing block 67 is also provided, which is also attached to the printer housing.
  • FIG. 4 shows the pinwheel sensor 85, which includes the pinwheel 60.
  • the spike wheel 60 is pivoted down, i.e. the spikes do not protrude beyond the paper guide plane 69.
  • the actuating lever 86 With the actuating lever 86, the spiked wheel 60 can be pivoted in or out in the direction F.
  • the pinwheel 60 is mounted on an axis 87, which also carries a gear 88.
  • a magneto-resistive sensor 91 detects pulses from the metal gears of the gear 88. These pulses can be clearly assigned to the rotary movement of the sprocket 60, so that the edge perforation of paper that runs over the paper plane 69 and engages with it can be scanned the spiked wheel 60.
  • the speed of the paper web 5 and its position in relation to the transport grid of the drive device can consequently be determined from these pulses.
  • the signals from the sensor 85 are therefore used as input signals for anti-slip control of the paper drive.
  • the sensor module 89 is electrically connected to a device controller (FIG. 5).
  • a second magnetoresistive sensor 92 detects whether the pinwheel sensor 85 is in the pivoted-on or pivoted-off position with respect to the paper guide plane 69. For this purpose, it interacts with a magnet 93 which is mounted on the guide surface 69. The entire spiked wheel sensor 85 can be locked in the pivoted or pivoted-in position with a locking mechanism 90.
  • FIG. 5 shows electronic control components of the printer and their interaction with the drive mechanism and sensors.
  • the drive unit 13 has a drive control 100 which is connected to a higher-level printer control 101 via a general data bus 112. Commands can be entered by the operator via a control panel 105.
  • the drive controller 100 receives the signals from the paper width sensor 17 or 55 via its interface 104.
  • the drive control 100 determines both the paper width and the paper type, ie whether there are perforations at the edges.
  • the drive control 100 also receives the scanning signals of the spiked wheel sensor 85 via its electronics 103 and that of the mark sensor 59 via its electronics 107.
  • the speed of the paper web 5 is calculated in the drive control 100 from the signals of the components 103 and 107. The result is used for anti-slip control of the stepper motor drive 102.
  • the target speed signals are supplied by the printer controller 101.
  • a paper web 5 is manually drawn into the printer through the various unit components up to the drive unit 13. There the front edge 110 of the paper web 5 is threaded up to the guide surface 69 in the area of the ruler 65.
  • the paper web 5 has an edge perforation, this is brought into engagement with the spikes 82 of the pivoted spike wheel 60. If the paper web has no edge perforation, the sprocket wheel 60 is set in the pivoted-down state. In the area of the ruler 65, the paper web 5 is already fed via the drive motor 41. The operator determines the direction of the feed (forward / backward) in order to align the start of a page exactly with a marking of the ruler 65 corresponding to the side length. The feed is relatively slow and in small increments.
  • the transport steps in the start mode are only fractions of the grid spacing, which is typically 1/6 inch (approximately 4.3 millimeters).
  • the step size is, for example, 1/20 grid spacing (approximately 0.21 millimeters).
  • the speed or position of the paper 5 is detected with the spiked wheel sensor 85 and compared with the speed or position of the drive motor 41. Slip that occurs, i.e., a discrepancy between these two speeds or positions is determined and compensated for by the drive control 100 by additional propulsion (additional steps in the direction of transport).
  • the position and / or speed of the paper web 5 are scanned with the brand sensor 59, the electronic components 107 of which deliver corresponding signals to the drive control 100.
  • the sensor 59 described above other sensors known per se for measuring speeds can also be used, for example the sensor described in DE 44 28 156 AI or the sensor described in US Pat. No. 5,204,620.
  • the paper web 5 is roughly positioned with its front edge 110 in the area of the sensor 59 or the ruler 65.
  • the operator is allowed a certain tolerance of, for example, a few millimeters, by which the position of the front edge (top of the page) of the paper web 5 may deviate from the desired position.
  • a corresponding insertion mark 65a is provided on the ruler 65 for the desired position.
  • Various insertion instructions are possible for this.
  • the insertion mark 65a can be located at different points on the ruler 65.
  • it can also be provided to provide a common insertion mark 65a on the ruler 65 for different side lengths.
  • the insertion mark 65a can also lie directly under the sensor 59, ie at its scanning point.
  • This mark 109 can be both text and graphic information, it also being conceivable to use a modified surface structure, for example a window cutout stamped into forms.
  • the sensor 59 is adapted to the selected brand information.
  • an optoelectronic sensor 59 is used which has a high contrast sensitivity and a color sensitivity. If window sections were used as brand information, a mechanical scanning device or an ultrasonic sensor could also be suitable as brand sensor 59, for example.
  • Such information of the form should be used as mark 109, which occurs only once per form page in relation to the feed direction A.
  • the evaluation electronics 107 of the sensor 59 or the unit control 100 must be able to filter out the repetitions within the page, so that the drive can be regulated precisely to the top of the page information. If characteristic properties of the mark 109, such as the size of the contrast transition, color of the background, color of the mark information, etc., are known, these can likewise be entered via the control panel 105 and stored in the memory 106 (steps S3, S4).
  • Information about the area of the form in which the mark 109 is located is also queried and, if necessary, stored. As a result, a window is specified within the form in which the sensor 59 reacts to the brand information.
  • the specification of a brand window also ensures that the brand information is assigned to the correct page, even if the same brand 109 occurs several times identically on a form page.
  • the data transfer between control panel 105, higher-level printer controller 101 and unit controller 100 takes place via the data bus 112.
  • the characteristic data about the mark 109 can also be provided by the printer controller 101, provided that it receives this data elsewhere.
  • the data can be supplied in the header area of a print job ( " ob).
  • An operator who compiles this print job on a higher-level control computer (print server) can add this information to the print job at this stage, which means that the print process when the print job arrives. jobs is further automated.
  • an automatic procedure 111 m gear is set, with which the unit control 100 detects and stores the characteristic values of the mark 109 fully automatically. This so-called sensitization process will be described in more detail later in connection with FIG. 7.
  • the drive 13 is fed step by step in a very small grid, which only 1/20 of the pitch of perforated paper 5 corresponds.
  • the actual page length of a form on the paper web 5 is determined.
  • a counter n is increased by the value 1 (step S6) and then checked whether the mark 109 has been recognized (step S7). If not, it is advanced again by one step and the payer n is increased again (steps S5, S6). If the mark 109 has been recognized, the page length value is taken from the memory 106 and advanced by almost one page length, ie by a step number that is smaller by x than the step number of the page length (n si , step S8).
  • step S9, S10 the step counter n is increased by the value 1 (steps S9, S10). Then it is again checked whether the next following mark 109 has been recognized (step S11), if not, it is advanced again and paid up, if so, then the value n is recorded as the current page length value and stored in the memory 106 (step S12). A message "ready to print” is then generated (step S13). Before the printing process on the photoconductor drum 16 can be started, the paper 5 with the previously determined values for the page length and for the mark position is still positioned correctly in relation to the photoconductor drum 16.
  • both the exact position of the form on the paper 5 relative to the printing unit and the actual form length important for the paper transport can be determined.
  • the printing process can be started immediately with a high degree of accuracy.
  • the method 59 In order to sensitize the sensor 59 (FIG. 7), the method 59 first places the sensor 59 on the background the paper web 5 adjusted. For this purpose, the unprinted paper web 5 is scanned by the sensor 59 and the sensor signals are read and buffered (step S15). It is then checked whether the background information has a sufficiently high signal strength (step S16). If not, sensor parameters such as amplification, illumination intensity or the like are changed and step S15 is repeated until the sensor signals are sufficiently large. Subsequently, the paper web 5 is moved forward in the recording direction (step S17) until the sensor 59 detects a sufficiently large marking to be distinguished from the background (step S18).
  • step S19 the start procedure continues with step S8. For this purpose, an instruction command "return to main" (step S20) is issued.
  • the paper web 5 is processed with precise pages, whereby complete pages are always printed. Slip between drive 13 and paper web 5 is detected in this operating mode in a manner similar to that in the start operating mode, but is not compensated for by additional feed but by a higher speed of the drive motor 41. If paper 5 with edge perforation is used, the edge punches are continuously scanned by the pinwheel sensor 85 and the scanning gnale used for anti-slip control. If paper 5 without edge perforation is used, the marking 109 is scanned page by page and this scanning result is used for anti-slip control. This side-by-side scanning can also be used instead of or in addition to scanning the spiked wheel sensor 85 in the case of perforated paper 5. In this case-by-case regulation variant, however, it is important that the drive 13 is so precise that within one page at the end of the page (or shortly before the mark 109 of the next page) there are no excessive displacements of the printed image.
  • the drive control 100 does not bring about an immediate stop of the drive, but rather a stop for the next page change. As a result of this measure, the assignment of the steps of the drive motor 41 to the scanned marks 109 is very well preserved.
  • the drive is first moved a few steps or even side lengths opposite to the printing transport direction A and then accelerated in the direction A.
  • the acceleration process can take place exactly in accordance with the movement of the start operating mode. Characteristic values about the necessary feed compensation are therefore also saved in the start phase and can be used when a canceled printing process is continued.
  • the side length of the paper web 5 is known from the start mode, its value can be reused after a print stop.
  • the procedure for determining the side length (FIG. 6) can then be dispensed with. If, after a print stop, it is necessary to reinsert the paper web 5, for example after a paper tear, the procedure is as follows: first, the operator roughly positions the new paper web 5 in the insertion area on the ruler 65. at a slow speed until the mark sensor 59 detects a mark 109. On the basis of this determined brand position and the page length determined before the printing stop, the paper web 5 is in turn positioned in the correct direction to the printing station 14 and the printing process is continued.
  • the paper web 5 is transported back and forth between the detected marks 109 one or more times relative to the mark sensor 59 after identifying two successive marks 109.
  • dynamic conditions during the acceleration of the paper web 5 can be determined more precisely and the drive control can be further improved in the acceleration phase.
  • an optimal speed curve of the drive is determined, through which slip is largely compensated for.
  • the drive control 100 can also determine whether and what type of paper is loaded in the printer. For this purpose, the drive motor 41 is moved back and forth several times and the sensor signals are evaluated. If one or more holes are recognized, a perforated paper web 5 is assumed. Based on the recognized hole positions, an automatic alignment to the hole pattern can then take place.
  • control accuracy within a page could be increased even with paper without margin.
  • a motor drive which acts on the mark sensor 59 transversely to the paper transport direction (direction E in FIG. 5) in the start operation phase, that the sensor 59 automatically detects the mark in this spatial direction.
  • the degree of automation and thus the operational safety could be further increased.
  • a further automation can be achieved if the brand sensor 59 is moved in a motor-driven manner in the direction E along the axis 73 (see FIG. 3).
  • electrophotographic printers have been described in the exemplary embodiments, the invention can also be applied to printers of other recording principles, for example to inkjet printers or thermal transfer printers.

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  • Handling Of Sheets (AREA)
  • Handling Of Continuous Sheets Of Paper (AREA)

Abstract

L'invention concerne un procédé et un dispositif pour commander un dispositif d'entraînement de papier (8) sans roues à picots dans une imprimante électrographique qui transfère des informations sur un support d'impression (5) en forme de bande constitué de pages portant chacune un marquage (109) optique similaire. Au cours d'une opération de démarrage, le bord avant (110) du support d'enregistrement (5) est appliqué, dans une zone d'introduction (69), sur une marque d'insertion (65a) prédéterminée de l'imprimante. Ensuite, le support d'impression (5) est avancé, par un moteur de transport (41, 102), d'une longueur prédéterminée, dans le sens de transport (A). Un capteur (59, 85) balaye, pendant le processus de transport, une zone prédéterminée du support d'enregistrement (5) et envoie des signaux résultant du balayage à un dispositif d'évaluation (100). Ce dispositif d'évaluation (100) détermine si les signaux résultant du balayage correspondent aux caractéristiques du marquage (109), et la longueur de transport comprise entre deux marquages (109) similaires successifs est identifiée par le dispositif d'évaluation (100) comme valeur correspondant à une longueur de page. Ensuite, le processus d'impression est lancé à une seconde vitesse de transport relativement élevée et le transport est commandé en fonction de la valeur identifiée comme correspondant à une longueur de page.
EP98955562A 1997-11-10 1998-11-10 Procede et dispositif de transport page par page d'un support d'impression preimprime sous forme de bande dans une imprimante Expired - Lifetime EP1030781B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19749596A DE19749596C1 (de) 1997-11-10 1997-11-10 Verfahren und Vorrichtung zur Steuerung eines traktorlosen Aufzeichnungsträger-Antriebes in einem elektrografischen Drucker
DE19749596 1997-11-10
PCT/EP1998/007172 WO1999024264A1 (fr) 1997-11-10 1998-11-10 Procede et dispositif de transport page par page d'un support d'impression preimprime sous forme de bande dans une imprimante

Publications (2)

Publication Number Publication Date
EP1030781A1 true EP1030781A1 (fr) 2000-08-30
EP1030781B1 EP1030781B1 (fr) 2002-09-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98955562A Expired - Lifetime EP1030781B1 (fr) 1997-11-10 1998-11-10 Procede et dispositif de transport page par page d'un support d'impression preimprime sous forme de bande dans une imprimante

Country Status (6)

Country Link
US (1) US6402405B1 (fr)
EP (1) EP1030781B1 (fr)
JP (1) JP2001522742A (fr)
CA (1) CA2309596C (fr)
DE (2) DE19749596C1 (fr)
WO (1) WO1999024264A1 (fr)

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Publication number Publication date
CA2309596C (fr) 2007-04-10
DE59805548D1 (de) 2002-10-17
JP2001522742A (ja) 2001-11-20
EP1030781B1 (fr) 2002-09-11
DE19749596C1 (de) 1999-03-25
WO1999024264A1 (fr) 1999-05-20
CA2309596A1 (fr) 1999-05-20
US6402405B1 (en) 2002-06-11

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