EP1030782B1 - Procede et dispositif pour transporter un support d'enregistrement en forme de bande pre-imprimee dans une imprimante - Google Patents

Procede et dispositif pour transporter un support d'enregistrement en forme de bande pre-imprimee dans une imprimante Download PDF

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Publication number
EP1030782B1
EP1030782B1 EP98965663A EP98965663A EP1030782B1 EP 1030782 B1 EP1030782 B1 EP 1030782B1 EP 98965663 A EP98965663 A EP 98965663A EP 98965663 A EP98965663 A EP 98965663A EP 1030782 B1 EP1030782 B1 EP 1030782B1
Authority
EP
European Patent Office
Prior art keywords
sensor
mark
recording medium
printer
page
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
EP98965663A
Other languages
German (de)
English (en)
Other versions
EP1030782A1 (fr
Inventor
Herbert Gibisch
Wolfram Keil
Holger Hofmann
Alex Windhager
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 EP1030782A1 publication Critical patent/EP1030782A1/fr
Application granted granted Critical
Publication of EP1030782B1 publication Critical patent/EP1030782B1/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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/50—Marks on printed material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/50—Marks on printed material
    • B41P2233/52—Marks on printed material for registering
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00443—Copy medium
    • G03G2215/00451—Paper
    • G03G2215/00455—Continuous web, i.e. roll

Definitions

  • the invention relates to a method and an apparatus for Transport of pre-printed, web-shaped record carriers, especially of continuous forms in one in particular electrographic printing device.
  • a web-shaped record carrier can be paper, foil, labels or other materials be used.
  • punched paper When printing on paper you will find different types of paper Application. In high performance electrographic printing with printing speeds of more than 40 pages per minute mainly so-called punched paper is used.
  • This Paper has lateral holes on its longitudinal edges for transport and for position monitoring of the paper. It will be there driven by caterpillars in the side transport holes intervention. Often this paper also has cross perforations, along which the individual sides of each other be separated.
  • the edge perforation is used in particular when processing pre-printed paper.
  • the im information subsequently applied to electrographic printing device For example, data on a preprinted form be printed, as precisely as possible at specified positions of the form come to rest.
  • the form can be from have been pre-printed on another type of printing device, e.g. from an offset printer or from an identical one electrographic printer.
  • For accurate printing within The form of the paper web must be in the direction of transport exactly on their drive or on the movement of the photoconductor drum be adjusted or synchronized.
  • the perforated paper is usually fed in a certain grid corresponding to the hole spacing, for example in a 1 ⁇ 2 inch grid or in a 1/6 inch grid.
  • the paper web is then not stepless, but instead gradually moved by a multiple of the grid spacing.
  • a printing device that is used to process roll paper without Edge punching is suitable, for example, in the WO 95/19929 A1.
  • a first contact edge is provided in this device, the specifies the lateral position of the paper, as well as stabilizing rollers, a vacuum brake and a roller assembly with a loop puller.
  • tractor-less friction drives there is the problem with tractor-less friction drives, that the transport accuracy in the feed direction is not always can be adhered to exactly. You can do this, for example Slip between the drive roller and the paper web or Manufacturing tolerances of drive mechanics contribute.
  • A is also a friction drive for Data printing devices known.
  • There is a scanning device in this drive provided that one preprinted on the edge of the form Mark recognizes. With the scanning result is in each case a reassignment of the row height at the beginning of the form made to the printing point.
  • a disadvantage of this drive is that a mark matched to the sensor is at a certain point The position of the form must be pre-printed so that the Control function can be performed.
  • a device through which a running form tape can be labeled with individual data is.
  • a sensor is provided, which is in the forms a specific, printed feature is detected in each case and then the pressure within a certain field in triggers the forms.
  • the disadvantage of this device is on the one hand, that the characteristic on the forms is a specific one Must have a configuration, for example a square shape, to be reliably recognized by the sensor.
  • the measurement reliability of the sensor depends largely on which one Record carrier is used. Especially the Contrast of a brand relative to the background (e.g. to a Paper surface) can vary from record carrier to Record carriers (e.g. with different types of paper) considerably differentiate.
  • DE-A-1937699 describes a method and an apparatus for Controlling a drive unit for a web, page by page pre-printed recording media according to the generic term of claims 1 and 26 known, in which a sensor is provided for scanning the record carrier.
  • a sensor is provided for scanning the record carrier.
  • US-A-4,994,975 and JP-A-5902068 are such Process known. All of these methods have in common that they have certain characteristic properties of the Brand, e.g. regarding the color of the brand or the contrast between the brand and its background area to be able to use the given sensor.
  • the record carrier must therefore be in a certain Be printed wisely.
  • DE-A-19631747 describes one that interacts with a light source optoelectronic sensor device for detection a marking of a previously known web-shaped recording medium in electrophotographic printing or copying facilities known as well as a device for controlling the Sensor device.
  • the type of measurement method is provided or the selection of a required light source in Dependence on a provided on the record carrier known brand.
  • the object of the invention is a method and an apparatus for controlling a drive for web-shaped recording media specify with which indefinitely pre-printed recording media can be transported precisely.
  • a Drive unit which in a particularly electrographic Printing device a web-shaped, pre-printed pages Record carrier transported, provided a sensor on a regularly recurring mark of the record carrier sensitize by setting sensor parameters.
  • the record carrier is used with the sensor of the printing operation continuously scanned and the transport of the record carrier with the sampled sensor signals regulated, the selected record carrier is pre-printed in any page. From the preprinted Information or from the surface structure of the record carrier a regularly recurring brand is selected and the sensor on the regularly recurring mark of the record carrier by setting sensor parameters sensitized.
  • the mark from the pre-printed information of the record carrier is selected, in particular an optoelectronic sensor is used.
  • the brand can thereby lie in or in the printable area of the printing device the template area of forms in which the printing device is customized Data prints. But as a brand, a surface structure, in particular a window section used become. This makes the process very flexible.
  • the pressure device can process any templates, being the sensor the appropriate or specified brand information sensitized. The brand is applied in particular on pages, where the brand information for page-by-page rules of the drive is used.
  • the invention is carried out by means of a measuring surface, automatically in an initialization process or is manually moved by the sensor so that the sensor Can sense the mark.
  • You can either do a sample of one currently pre-printed brand or a standardized measuring surface, the standardized brands are represented, used.
  • the measuring surface can be a colored surface (template) or be designed as an image-permeable, colored film.
  • the background can in particular be a measuring surface be provided, the record carrier to be inserted (e.g. a specific type of paper).
  • a sample of the applicator can serve as a measuring surface for this purpose.
  • the invention is the contrast between the Mark and the background on which the mark is printed is.
  • the contrast is possible to use the contrast to determine the brand and / or with the measuring surfaces.
  • the brand and / or the background on the record carrier directly on the record carrier to determine and derive the contrast from this.
  • a window in particular a time window or a number of steps of a stepper motor is within which the sensor signals are detected. For this purpose, it is checked whether the Mark is or has been detected within this window, and an error message if the mark is inside of the time window is not detected.
  • a controller assigned to the sensor can also be characteristic External brand data, especially in the Header area of a print job.
  • the record carrier is in particular initially in the recording direction moved by a certain length to the Sensitize the sensor in a brand-specific manner. If the brand during this forward movement it was not found, it will then moved in the opposite direction. Several such cycles of back and forth movements can be performed with a setting value on the sensor after each cycle is changed. Sensor parameters such as spectral Sensitivity can be changed.
  • the position of the sensor in the The detection area is particularly transverse to the direction of transport of the record carrier changeable.
  • the senor the invention is therefore adaptable to the respective form content by sensitizing to selected information becomes.
  • the sensor can be particularly sensitive to color, the sensitization, i.e. the setting of sensor parameters takes place in a preferred embodiment to certain Background or brand colors. Awareness raising the sensor can alternatively or additionally also with regard to a geometric shape of the markings or in terms of the surface structure of the recording medium web.
  • the marks can be provided in paper webs Notches or windows in form templates his.
  • a sensor setting value determined during the sensitization is preferably saved and for later measurements reused.
  • the sensor is preferably sensitized by the paper at least once in or against the direction of transport being transported, during this movement the evaluation device checks whether and when the sensor emits a signal. It can be provided that at least one cycle of forward and backward movements is carried out and that after every movement or after every Cycle a set value on the sensor is changed.
  • the record carrier web is driven by a transport motor at a first, relatively low speed along a transport direction by a predetermined length transported.
  • a sensor scans a specified 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 between two consecutive brands lying transport length then from the evaluation device as a value for one side length identified.
  • the printing process is done with initiated a second, relatively high transport speed and with the identified value for the side length controlled.
  • the drive for the Path of the record carrier after one page feed is synchronized to the side length. Positional deviations the web caused by inaccurate insertion of the paper web or occur due to increased slippage between the drive and the web, are automatically compensated. Starting with The printing process can then already take place on the second side. Waste, i.e. excess unprinted paper largely avoided. Already with the first printed page the printing takes place precisely within the form.
  • the starting procedure according to the invention in particular achieves that printing begins with the first page can, that of the required to sensitize the sensor Page follows.
  • the invention is particularly for use in a printing system suitable, the two identical, connected in series Printer includes and in which the second printer from the first Paper web printed out online, i.e. without noteworthy Time delay processed.
  • the second printer prints those from the first Printer-supplied paper web optionally on the back or on the same page, for example with a different one Colour.
  • the two printers can use a tractor drive or with a tractorless friction drive for Transport of the record carrier be provided.
  • the second Printer feels the first one during the printing process Printers printed brands down at its processing speed to be regulated so that the printed images are exactly one above the other or the printers work synchronously with each other.
  • the measuring area in the second printer exactly Adjust the ink of the first printer.
  • a set of measuring surfaces can be used in the second printer Be made available that are identical to the printing inks of the first printer.
  • the measuring surfaces can also from the first printer on the Record carrier as a gray value and / or as a stripe pattern applied and scanned in the second printer.
  • the procedure according to the invention can be largely automated. Operator error when inserting the web-shaped recording medium in the printer are therefore largely excluded or can be compensated. The process needs little time, reducing the effective printing time of the Printer is high.
  • the sensor is powered by a motor shifted, the degree of automation of the Increase operations further.
  • the printing device shown in Figure 1 takes one tape-shaped recording medium 5 made of paper from a paper input container 1 or from a supply roll 11.
  • the paper web 5 is a loop 12 one Deflection device 2 supplied and then in a web pre-centering device 3 along a contact edge friction drive rollers 4 fed. Then it is from one Drive 8 pulled over a vacuum brake 6, which with a vacuum pump 7 is connected, which generates the negative pressure.
  • the paper web 5 is braked by the negative pressure while increasing the tension of the paper web 5. The higher the tension is, the more stable the paper web 5 runs Transport direction A, i.e. the less it slides laterally from the target paper transport direction.
  • the paper web 5 passes through a stabilization zone, the from several pulleys 9 and a loop puller 10 exists.
  • the paper web wraps around the deflection rollers 9 at least 180 °, which makes the paper web laterally wider is stabilized.
  • a sensor arrangement 17 optically scans the paper.
  • the Sensor arrangement 17 is designed so that it is the widest Paper that can be processed in the printer still covers all of it Can scan width.
  • the width of the sensor arrangement is thus both the mechanical components for paper transport adapted as well as to the parameters on the recording side the printing device 14, which determine the printable width. It is particularly the width of a photoconductor drum 16 adjusted.
  • the paper width that can be processed is sufficient present embodiment from 6.5 inches (165 mm) to 19 inches (482.6 mm). Details of the sensor arrangement 17 are in DE-U-297 23 879 (applicant's file number: 971101) described.
  • the paper web 5 is transferred from the sensor arrangement 17 via a drive unit 13 fed to a transfer station.
  • the transfer station includes a in the illustrated embodiment Photoconductor drum 16, which with a Corotron device 16a cooperates.
  • the photoconductor drum 16 is known Way exposed by light with information, whereby a charge pattern is applied. Then takes They have a magnetized toner that is in the transfer printing area the paper web 5 is transferred. Then the unloads Corotron device 16a the corresponding area of the photoconductor drum again, so this again with information can be described.
  • Corotron device 16a acts thereby in a manner known per se, for example in the EP 0 224 820 B1.
  • the sensor arrangement 17 is in the area arranged the paper feed device 15, it can but also be provided within the printing unit 14.
  • the paper web 5 is transported in the paper transport direction A.
  • Figure 2 shows this in the area of the transfer station or the photoconductor drum 16 of the electrophotographic printer Drive unit 13 more precisely.
  • a roller arrangement 20 also presses on the drive roller 40 given spring force. This will make it between the Rolls 40 and 20 transported paper through friction (Friction) moved by the drive roller 40.
  • the drive roller 40 is in turn via a toothed belt drive connected to the stepper motor 41.
  • the entire drive unit 25 is flanged to a printer housing via the bearing block 44.
  • On the bearing block 44 is through the ball bearing 43 common bearing axis 42 mounted, on the one hand, the rotary movement the drive roller 40 and the other one Swiveling movement of the drive elements about the swiveling axis B.
  • the drive components are to enable the swiveling movement mounted on a support plate 47, which via a Gas pressure spring 49 and via the bearing axis 42 with the bearing block 44 is connected.
  • Threads 45 located in the bearing block 44 serve for receiving of mounting screws through the printer housing 18 be performed.
  • the entire drive unit is over guide surfaces 46 adjustable within the printer housing.
  • the Carrier plate 47 is in turn adjustable with respect to bearing block 44, a first adjustment screw 51 and a second Adjustment screw 52 are provided in the bearing block 44 strike the cylinder-side cylinder pins.
  • the gas pressure spring 49 is connected to the carrier 47 by the screw connection 50 connected and to the bearing block 44 through the Screw connection 48. Carrier 47 and bracket 44 are against each other lockable with the locking device 54.
  • the paper sensor scans the entire paper Width of the printable area of the photoconductor drum, whereby both the side paper edges and any Perforations in the edge of the paper web can be recognized.
  • the transfer zone 5 of the printing device is through the paper sprung pivot jaws 56 to the surface of the photoconductor drum 2 pressed.
  • a known electrical Corotron device 57 generates a high voltage through which the toner on the photoconductor drum is drawn towards the paper becomes.
  • Deflection rollers 58 continue to lead the paper to one Mark sensor 59, any existing on the paper web Detects printing or cutting marks.
  • Grounded electrical connections 61 (antistatic sheets) lead any, on paper any residual electrical charges present.
  • edge perforation can be scanned with a spike wheel 60 become.
  • Figure 3 shows the paper drive 25 in a three-dimensional Presentation. These include, in particular, those on the carrier plate 47 mounted cylinder pin 66 to recognize which with the in the bearing block 44 screwed adjustment screw 52 cooperates, and the screw connection 50 of the gas pressure spring 49.
  • the paper is guided by a guide surface 69 led.
  • This is also the area where Scanning of the paper with the mark sensor 59.
  • a ruler 65 is provided, which for the printer startup is used. Newly loaded paper, which Has perforations at the edge, with a top of the page to a mark 65a corresponding to the side length Rulers 65 applied, the edge perforation in engagement with the pivoted Barbed wire 60 brought, and the printing process initiated.
  • the pinwheel 60 is part of a sensor arrangement, which is described in more detail in FIG.
  • a drive motor 68 pulls a corotron wire according to the page width to be printed the corotron wire cassette 57.
  • the mark sensor 59 is along the rod 73 is displaceable in the direction E.
  • the sheet 66 covers the drive motor 41 and serves in particular the 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 is the pinwheel 60 includes.
  • the spiked wheel is pivoted away, i.e. the spikes do not protrude above the paper guide level 67 beyond. With the operating lever 86 this can Swing the pin wheel in or out in the F direction.
  • the spiked wheel 60 is mounted on an axis 87, which is also a gear 88 wears.
  • a magneto-resistive sensor 91 detects pulses the metal gears of gear 88. Let these impulses clearly associate with the rotary movement of the pinwheel 60, so that the edge perforation of paper is scanned can, which runs over the paper plane 67 and engaged with the spiked wheel 60.
  • sensor module 89 is electrical connected to a device control ( Figure 5).
  • a second magneto-resistive sensor 92 detects whether the pinwheel sensor 85 in the pivoted position with respect to the paper guide plane 67. It acts for this purpose together with the magnet 93 on the guide surface 67 is mounted. With a locking mechanism 90 the entire pinwheel sensor 85 in the pivoted or pivoted Position to be locked.
  • FIG. 5 shows electronic control components of the printer as well as their interaction with the drive mechanics and Sensors.
  • the drive unit 13 has a drive control 100 using a general data bus 112 a higher-level printer controller 101 is connected. about A control panel 105 can be used to enter commands from the operator become.
  • the drive controller 100 receives the signals from the paper width sensor 17 or 55 via its interface 104. From this, it determines both the paper width and the Paper type, i.e. whether there are perforations around the edge.
  • the drive control 100 also receives the scan signals from the spiked wheel sensor 85 via its electronics 103 and that of Brand sensor 59 via its electronics 107. From the signals of components 103 and 107 is in the drive control 100 calculates the speed of the paper web 5. The result becomes the anti-slip control of the stepper motor drive 102 used.
  • the target speed signals will be delivered by the printer controller 101.
  • a paper web 5 is manually fed into the printer through the various Unit components up to the drive unit 13 moved in. There the front edge 110 of the paper web 5 up to the guide surface 67 in the area of the ruler 65 threaded.
  • the paper web 5 has an edge perforation, this is in engagement with the spikes of the pivoted spiked wheel Brought 82. If the paper web has no edge perforation, the spiked wheel 82 is set in the swiveled state.
  • the paper web is fed in the area of the ruler 65 5 already via the drive motor 41.
  • the operator determines the direction of the feed (forward / backward) around the The beginning of a page exactly to the length of the page Align the marking of the ruler 65.
  • the feed takes place relatively slowly and in small increments.
  • the transport steps are only a fraction of the grid spacing in the start mode, which is typically 1/6 inch (approximately 4.3 millimeters) is.
  • the step size is, for example 1/20 grid spacing (about 0.21 millimeters).
  • the mode of transport is the speed with the spiked wheel sensor 85 or the position of the paper detected and with the speed or position of the drive motor compared.
  • a discrepancy between these two speeds or Positions for example due to slippage, shrinked paper web or causes inaccuracies in the drive rollers, is determined and by the drive control 100 by additional propulsion (additional steps in Direction of transport) balanced.
  • the paper web 5 with its front edge 110 in Area of the sensor 59 or the ruler 65 roughly positioned.
  • the operator is given a certain tolerance of, for example Allow a few millimeters for the location the leading edge (top of the page) of the paper web 5 from the desired position may differ.
  • a corresponding one is for the target position
  • Insert marking 65a is provided on the ruler 65.
  • the insertion mark can be The ruler.
  • it can also be provided be a common one for different side lengths
  • the insertion mark can also be placed directly under the sensor 59, i.e. at its sampling point.
  • the forms pre-printed on the paper web then become selected certain information that serves as mark 109 should.
  • This mark 109 can be both text and graphic Be information, although it is also conceivable to change it Surface structure, for example one in forms stamped window cutout to use.
  • the sensor 59 is adapted to the selected brand information. in the This exemplary embodiment is an optoelectronic Sensor 59 uses a high contrast sensitivity as well as color sensitivity. Would you cut windows as brand information, for example also a mechanical scanner or an ultrasonic sensor be suitable as a brand sensor.
  • the brand 109 comes up several times on a form page before, the evaluation electronics of the sensor 107 or Genset control 100 will be able to do the repetitions filter out within the page so that the drive each be regulated precisely to the top of the page information can.
  • characteristic features of brand 109 such as size of the contrast transition, color of the background, color of the brand information etc. are known, can also be via the control panel 105 entered and stored in the memory 106 (steps S3, S4).
  • the information in which area of the form the Mark 109 lies is queried and possibly saved.
  • a window is specified within the form, by the sensor reacting to the brand information.
  • the specification of a brand window also ensures that the brand information assigned correctly becomes, even if the same mark 109 multiple times occurs identically on a form page.
  • the data transfer between control panel 105, higher-level printer controller 101 and unit control 100 takes place via the data bus 112.
  • the characteristic data about the brand can also be from the printer controller 101, if provided otherwise receives this data. For example, the data supplied in the header area of a print job become. An operator running this print job on a parent Control computer (print server), can add this information to the print job at this stage, whereby the printing process continues when the print job arrives is automated.
  • a parent Control computer print server
  • the drive 13 is advanced step by step in a very small grid, which corresponds to only 1/60 of the hole spacing of punched paper.
  • 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 has been recognized (step S7). If not, it is advanced again by one step and the counter n is increased again (steps S5, S6). If the mark has been recognized, the page length value is removed from the memory 106 and advanced by almost one page length, ie by a number of steps which is smaller by x than the number of steps of the page length (n sl , step S8).
  • Step S9, S10 you move forward one step at a time, and the pedometer n increases by the value 1 (Steps S9, S10). Then it is checked again whether the next mark was recognized (step S11) if not, is advanced again and counted up, if so, then the value n is recorded as the current page length value and stored in the memory 106 (step S12). Subsequently a "ready to print" message is generated (Step S13). Before printing on the photoconductor drum can be started, the paper with the previously determined Values for the side length and for the brand position still positioned correctly in relation to the photoconductor drum 16.
  • Step S15 the unprinted paper web from Sensor scanned and the sensor signals read and buffered. Then it is checked whether the background information has a sufficiently high signal strength (step S16). If not, sensor parameters such as gain, lighting intensity or the like and step S15 repeats until the sensor signals are sufficiently large. Then the paper web 5 in Recording direction moved forward (step S17) as long as until the sensor is large enough to be distinguished from the background Mark detected (step S18). If at no mark for a specified number of feed steps can be determined with sufficient accuracy, the paper web 5 fully retracted again, the settings on the sensor changed and a new search started.
  • the sensor settings are changed until the sensor recognizes a brand.
  • the operator can search at any time be canceled.
  • Integrated light sources can also change their spectral distribution (red, green, blue) can be changed. This can colored markings against a colored background from the sensor be recognized.
  • the determined values for the background and the mark is stored in memory 106 (Step S19). After step S19, the starting procedure continued with step S8. This is an instruction command "Return to main" (step S20) issued.
  • the paper web 5 reinsert, e.g. after a paper tear, it becomes as follows first: the operator positions the new paper web 5 roughly in the insertion area 67 on the ruler 65. Then is the paper web 5 from the drive unit 13 with the first, slow speed transported as far forward, until the mark sensor 59 detects a mark. Based this determined brand position and that before the print stop determined page length, the paper web 5 is again justified positioned to the printing station 14 and the printing process continued.
  • the paper web is relative to the brand sensor identifying two successive brands or back and forth between the detected marks transported. This allows dynamic conditions the acceleration of the paper web 5 can be determined more precisely and the drive control continues in the acceleration phase be improved. In particular, there is an optimal speed profile of the drive determined by the Slip is largely balanced. These values can be job or can be saved on a paper-specific basis and continued after a print stop for additional speed control of the drive can be used.
  • the drive control 100 With the signals of the paper width sensor 17, the drive control 100 also determine if and what kind of Paper is loaded in the printer. This is the drive motor moved back and forth several times and the sensor signals evaluated. If one or more holes are recognized, then assumed a punched paper web. Based on the recognized Hole positions can then also be automatic alignment on the grid.
  • FIG 8 there are different variants for sensitization a brand sensor 59 shown.
  • the one shown in Figure 8a Variant will be the mark 109 directly on the paper web 5 the brand sensor 59 scanned.
  • the one shown in Figure 8b Variant is a reference measuring surface 30 in front of the mark the brand sensor 59 pivoted and scanned.
  • the reference measurement area 30 corresponds in terms of shape, color and / or other criteria of the brand 109.
  • Predefined from a set Brand parameters can then be an appropriate, the brand measurement area corresponding to a current print job selected several measuring areas stored in the pressure device become.
  • the selection of the suitable measuring surface can be done automatically are controlled by appropriate, within the print job defined brand parameters or manually by the operator initiated by the printer.
  • FIG. 8c shows a variant that the one in FIG. 8b described corresponds, here instead of the movement of Measuring surface 30 in front of the mark sensor 59 of the mark sensor 59 Measuring surface 30 is shifted out.
  • the mark can be according to the variant shown in Figure 8d directly the paper web 5 or again a background measuring surface 31 in front of the brand sensor 59. From the measured values of the brand or the brand measuring surface 30 and the value for the background can be used to determine the contrast, which is needed to reliably detect the mark. Correction parameters can also be based on this contrast value can be set on the sensor 59 so that this is the mark surely recognizes.
  • the determination of the brand parameters and / or the contrast can be completely automatic from the printer controller be carried out when the measuring surfaces with the help of a drive be positioned in front of the brand sensor, or the Sensor can be moved automatically.
  • the operator can use the printing system e.g. communicate the color of the pre-printed brand.
  • the printer control can then immediately with a suitable measuring surface the sensitization (calibration) of the sensor to the one to be processed Paper web or on the mark on it carry out.
  • measuring surface 33 is linear and has several segments with different shades of gray and / or colors.
  • the Measuring surface 34 has such segments as well as a gap 35, for scanning the paper web 5 or the background measuring surface 31 is provided.
  • FIG. 10a shows a first variant for determining the contrast shown on a paper web 5.
  • One with a gray grid Occupied measuring area 35 is from a first printer 37 printed on the paper web 5 and to a second printer 38 transported. There the mark sensor 59 senses the paper web 5 from. First, sensor 59 scans the unprinted paper web 5 and saves the measured brightness background. Then the paper web 5 from the first printer 37 to second printer 38 transported until the measuring surface 35 before the brand sensor 59 comes to rest in the second printer 38. The brightness value of the printed surface 35 is measured there and the contrast of light (unprinted) area and dark (printed) area saved. Finally checks the printer control whether the contrast achieved is sufficient is. If it is not enough, the sensitization process repeated again, with the sensor parameters set to larger Sensitivity and / or the brand with greater Density printed again and the initialization process repeated become.
  • the first prints Printer 37 a stripe pattern 36 on paper web 5.
  • the second printer 38 pushes the paper web 5 by the same length without printing until the printed one Area 36 is in the area of the brand sensor 59.
  • the second Printer 38 positions the paper web so that an unprinted one Surface of the stripe pattern 36 in front of the mark sensor 59 comes to rest.
  • the brightness value of the unprinted Paper saved.
  • the second printer 38 the paper web so that one of the previously printed Stripe of stripe pattern 36 in front of the mark sensor 39 comes to rest.
  • the second step of the awareness process carried out the brightness value of the printed Paper is measured and finally the contrast saved from light and dark area. In conclusion again checked whether the contrast value achieved is sufficient is or if necessary the measurement is repeated at other measuring positions, until a sufficiently large contrast is achieved.
  • the pressure of a gray grid according to FIG. 10a can also be used to scan the sensing area of the mark sensor to optimize.
  • the circular Scanning surface 39 of sensor 59 has a gray area 22 to capture.
  • black marks are printed in accordance with the in Figure 11b shown embodiment 21 printed, which is not cover the entire scanning area of the sensor, so with the brightness of the thin, line-shaped, determined by the sensor Brand 21 roughly comparable to the brightness value of the gray area of the figure lla. So that is the scanning security higher in print mode if a for the teach-in process gray instead of a black surface is used. This is particularly advantageous if very much in printing Narrow, black lines are used, which during the Teach-in process could hardly be positioned precisely enough.

Claims (28)

  1. Procédé pour commander une unité d'entraínement (13) qui fait défiler un support d'information (5) préalablement imprimé par pages et se présentant sous la forme d'une bande dans un appareil d'impression, en particulier de type électrographique, dans lequel
    le support d'information (5) est exploré en continu en mode d'impression par un capteur (59), et
    la vitesse de défilement du support d'information (5) est réglée par les signaux résultant de l'exploration par le capteur,
    caractérisé en ce que
    un support d'information quelconque (5) préalablement imprimé par pages est choisi pour être traité,
    un repère (109) apparaissant régulièrement est sélectionné à partir des informations préalablement imprimées, ou bien à partir de la structure de la surface du support d'information (5), et
    le capteur (59) est rendu sensible au repère (109), apparaissant régulièrement, du support d'information (5) en réglant des paramètres du capteur.
  2. Procédé selon la revendication 1, caractérisé en ce que le repère (109) est sélectionné à partir des informations préalablement imprimées sur le support d'information (5).
  3. Procédé selon la revendication 1; caractérisé en ce que pour effectuer la sensibilisation, au moins une surface de mesure de référence (22, 30, 33, 34) est explorée, laquelle surface n'est pas imprimée sur le support d'information (5) et, en ce qui concerne le paramètre à détecter, correspond au repère (109).
  4. Procédé selon la revendication 3, caractérisé en ce que la surface de mesure de référence (22, 30, 33, 34) peut en option pivoter à l'intérieur de l'appareil d'impression devant le capteur (59).
  5. Procédé selon la revendication 3 ou la revendication 4, caractérisé en ce qu'une seconde surface de mesure de référence (31) est explorée, laquelle surface correspond au support d'information (5) non imprimé.
  6. Procédé selon la revendication 5, caractérisé en ce qu'une valeur de contraste est déterminée à partir de l'exploration des deux surfaces de mesure de référence (30, 31).
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce qu'il est utilisé un capteur optoélectronique (59).
  8. Procédé selon l'une des revendications précédentes, caractérisé en ce que le repère (109) est situé dans la zone imprimable de l'appareil d'impression.
  9. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'une structure de surface, en particulier une découpe en forme de fenêtre, est utilisée comme repère.
  10. Procédé selon l'une des revendications précédentes, caractérisé en ce que le repère (109) est présent à chaque page.
  11. Procédé selon l'une des revendications précédentes, caractérisé en ce que pour rendre le capteur (59) sensible, il est tout d'abord effectué l'exploration du fond du support d'information (5), puis du repère (109).
  12. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'il est conféré au capteur (59) une sensibilité spectrale.
  13. Procédé selon l'une des revendications précédentes, caractérisé en ce que pour effectuer la sensibilisation et/ou pour détecter les repères (109) suivant le premier repère détecté, le support d'information (5) défile à une vitesse prédéterminée, en ce qu'il est prévu une fenêtre, en particulier une fenêtre temporelle ou un nombre de pas d'un moteur pas-à-pas (41), dans laquelle les signaux délivrés par le capteur sont détectés, en ce qu'il est vérifié si le repère (109) est détecté à l'intérieur de cette fenêtre, et en ce qu'il est délivré un message d'erreur si le repère n'est pas détecté dans la fenêtre temporelle.
  14. Procédé selon l'une des revendications précédentes, caractérisé en ce que pour effectuer la sensibilisation, une zone d'amorce (110) du support d'information (5) est agencée à une position de début (65a) prédéterminée dans l'appareil d'impression, et en ce que l'unité d'entraínement (13) fait défiler le support d'information (5) depuis la position de début dans le sens de défilement (A).
  15. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'un dispositif d'entraínement à friction est utilisé comme unité d'entraínement (13).
  16. Procédé selon l'une des revendications précédentes, caractérisé en ce que le repère (109) est détecté à chaque page par le capteur (59).
  17. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'il est utilisé une commande (100, 107), associée au capteur (59), à laquelle des données caractéristiques peuvent être transmises par le repère (109).
  18. Procédé selon la revendication 17, caractérisé en ce que les données caractéristiques contiennent des informations de lieu et/ou des informations de spectre.
  19. Procédé selon l'une des revendications précédentes, caractérisé en ce que le support d'information (5) est tout d'abord déplacé dans le sens (A) des informations sur une longueur déterminée pour la sensibilisation spécifique du capteur (59) au repère, puis est déplacé dans le sens contraire si le repère (109) n'a pas été trouvé lors du déplacement vers l'avant.
  20. Procédé selon la revendication 14, caractérisé en ce que après une recherche infructueuse du repère (109) dans une zone prédéterminée du support d'information (5), des paramètres de capteur tels que la sensibilité spectrale sont modifiés, et une nouvelle recherche du repère (109) est effectuée.
  21. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'il est utilisé un capteur (59) dont le domaine de détection est modifiable transversalement au sens de défilement (A) du support d'information (5).
  22. Procédé selon la revendication 16, caractérisé en ce qu'il est utilisé un capteur (59) monté mobile transversalement au sens de défilement (A), lequel capteur est en particulier entraíné par un moteur.
  23. Procédé selon la revendication 16, caractérisé en ce qu'il est utilisé comme capteur (59) une caméra à définition locale détectant la largeur totale du support d'information (5), la zone d'exploitation de la caméra pouvant être resserrée.
  24. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'il est utilisé un capteur (59) auquel peut être conférée une sensibilité spectrale, et en ce qu'il est utilisé des moyens d'introduction et/ou de mémorisation de données à l'aide desquels des données spécifiques du repère peuvent être transmises aux moyens de commande (107) du capteur (59).
  25. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'il est réalisé plusieurs cycles de déplacement en avant et en arrière, et en ce qu'une valeur de réglage est modifiée au niveau du capteur (59) après chaque cycle.
  26. Dispositif pour commander une unité d'entraínement qui fait défiler un support d'information (5) préalablement imprimé par pages et se présentant sous la forme d'une bande dans un appareil d'impression, en particulier de type électrographique, comprenant :
    un capteur (59) qui explore le support d'information (5) en passant sur des marques (109) apparaissant régulièrement, et qui explore en continu le support d'information en mode d'impression,
    un dispositif de commande (100) qui règle la vitesse de défilement du support d'information (5) au moyen de signaux résultant de l'exploration par le capteur (59),
    caractérisé en ce qu'il est prévu
    un moyen (100, 105) à l'aide duquel un repère (109) apparaissant régulièrement peut être sélectionné sur un support d'information quelconque (5) préalablement imprimé par pages, et
    un moyen (100, 107) à l'aide duquel le capteur (59) peut être rendu sensible au repère (109) apparaissant régulièrement en réglant des paramètres du capteur.
  27. Dispositif selon la revendication 26, dans lequel il est prévu des moyens pour réaliser un des procédés selon les revendications 2 à 25.
  28. Système d'impression comprenant un premier appareil d'impression et un second appareil d'impression qui impriment l'un après l'autre un support d'information (5) se présentant sous la forme d'une bande, dans lequel un repère (109) généré par le premier appareil d'impression sur le support d'information (5) est exploré dans le second appareil d'impression, et le résultat de l'exploration est utilisé pour commander une unité d'entraínement, et dans lequel il est prévu un dispositif selon l'une des revendications 26 ou 27.
EP98965663A 1997-11-10 1998-11-10 Procede et dispositif pour transporter un support d'enregistrement en forme de bande pre-imprimee dans une imprimante Expired - Lifetime EP1030782B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19749656 1997-11-10
DE19749656 1997-11-10
PCT/EP1998/007171 WO1999024263A1 (fr) 1997-11-10 1998-11-10 Procede et dispositif pour transporter un support d'enregistrement en forme de bande pre-imprime dans une imprimante

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EP1030782A1 EP1030782A1 (fr) 2000-08-30
EP1030782B1 true EP1030782B1 (fr) 2001-05-30

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US (1) US6256474B1 (fr)
EP (1) EP1030782B1 (fr)
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WO1999024263A1 (fr) 1999-05-20
EP1030782A1 (fr) 2000-08-30
US6256474B1 (en) 2001-07-03

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