EP0878311B1 - Imprimante pour imprimer une pluralité d'images sur une bande - Google Patents

Imprimante pour imprimer une pluralité d'images sur une bande Download PDF

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Publication number
EP0878311B1
EP0878311B1 EP19980301297 EP98301297A EP0878311B1 EP 0878311 B1 EP0878311 B1 EP 0878311B1 EP 19980301297 EP19980301297 EP 19980301297 EP 98301297 A EP98301297 A EP 98301297A EP 0878311 B1 EP0878311 B1 EP 0878311B1
Authority
EP
European Patent Office
Prior art keywords
web
printing
synchronisation
printing station
marks
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
EP19980301297
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German (de)
English (en)
Other versions
EP0878311A1 (fr
Inventor
Gabriel Geradus Van Weverberg Erik
Marcel Lieva Armand Bollansée Erik
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.)
Xeikon Manufacturing NV
Original Assignee
Xeikon NV
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
Priority claimed from EP97301251A external-priority patent/EP0861734A1/fr
Application filed by Xeikon NV filed Critical Xeikon NV
Priority to EP19980301297 priority Critical patent/EP0878311B1/fr
Publication of EP0878311A1 publication Critical patent/EP0878311A1/fr
Application granted granted Critical
Publication of EP0878311B1 publication Critical patent/EP0878311B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/02—Conveying or guiding webs through presses or machines
    • B41F13/025—Registering devices
    • 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
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/54—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements

Definitions

  • This invention relates to a printer for printing a plurality of images on a substrate web.
  • the printer described by Rodek operates on the basis of the substrate web moving at a nominally constant speed and of the provision of uniformly spaced marks on the web.
  • the requirements may be difficult to meet accurately. Variations in operating conditions or in the condition of the web, may result in minor variations in the web speed.
  • the substrate web has been pre-printed, it is rolled and stored prior to use, during which some dimensional changes in the web, such as stretching and relaxing, may occur. The result of this is that marks pre-printed on the web may no longer be equally spaced.
  • the printer described by Rodek also has the disadvantage that, should any change in web speed be made, a correction in the timing of the exposure is made at a point which may be located in the middle of an image. An image carrying such a intermediate correction is undesirable.
  • United States patent US 5315323 (Ohshima et al. / Ricoh Company Ltd.) describes a colour image forming apparatus for forming an image on a paper web by sensing a register mark formed on the paper by a writing head. The distance between the register mark and the sensor and the distance between the writing head and the paper web are kept constant. This arrangement is not suitable for the printing of pre-printed stock.
  • European patent application EP 624477 (Canon K K) describes a method in which an image including a mark is printed on a substrate by screen printing. Another image is then printed on the substrate by ink-jet printing on the basis of the detection of the pre-printed mark.
  • the mark detector is mounted on the ink jet printing head. The substrate is fed past the ink jet printing head in a step-wise manner, the mark detector being moved laterally into a parking position as printing continues. This arrangement does not allow for the printing of an image to be initiated at a position other than at the location of the mark. Furthermore, the use of step-wise transport of the substrate is to be avoided for high quality high speed print work.
  • United States patent US 5464289 discloses an electrographic label system whereby flexographic and electronic printing are combined in a modular design to produce multi-colour labels. An electronic eye is used to read register marks imprinted on label stock and a signal is then sent to the printing head of the electronic printer.
  • the printer includes a digital printing station and a printing sequence is initiated at the printing station in response to the sensing of each of a plurality of synchronisation marks.
  • a printer for printing a plurality of images on a substrate web carrying a plurality of synchronisation marks comprising:
  • a method for printing a plurality of images on a substrate web carrying a plurality of synchronisation marks comprising continuously feeding the substrate web from a roll past a digital printing station in a transport direction, the digital printing station including a rotatable drum having a photosensitive surface, and an exposure device for image-wise exposing the photosensitive surface, and sensing the synchronisation marks on the web at a fixed position upstream of the printing station, characterised by:
  • the printer will usually further comprise means such as an encoder for generating signals indicative of web displacement, the control means being adapted to act in response to such web displacement signals.
  • the control device operates independently of the web speed, and is in particular insensitive to variations in the web speed.
  • the printer may further comprise a cutting device positioned downstream of the printing station, for cutting the web into sheets, each cut sheet carrying an image and its associated synchronisation mark.
  • the cutting device is controlled by the control device to cut the web at a predetermined location in the transport direction relative to an associated one of the synchronisation marks.
  • the sensing device is preferably sensitive to pre-printed synchronisation marks on the substrate web, watermarks in the substrate web, and/or disconformities in the substrate web.
  • the sensing device is sensitive to pre-printed synchronisation marks distinguishable in the visible spectrum.
  • the preferred longitudinal dimension (direction of web movement) of each synchronisation mark depends upon the expected web speed, and is, for example, at least 0.6 mm, typically from 1.00 mm to 4.00 mm, at a web speed of about 120 mm/sec.
  • a lateral dimension of at least 10 mm should be sufficient to allow for variations in cross-web alignment.
  • the spacing between consecutive marks should be at least 0.6 mm.
  • the synchronisation mark may be located in a margin, i.e. to one side of the image to be printed, between adjacent pages, within the area to be occupied by the image, or even as part of the image. The latter will more usually be the case when the synchronisation mark is a watermark or a disconformity in the substrate web.
  • a reflective optical sensor is suitable for detecting synchronisation marks in the form of printed marks or punched holes, whereas a transmissive optical sensor is suitable for detecting watermarks, security items within the substrate web or die-cuts.
  • a non-optical sensor can be used to detect non-conformities in the substrate web.
  • the sensor may be adapted to distinguish the synchronisation marks from other marks on the substrate web.
  • the sensor may be an intelligent sensor capable of recognising synchronisation marks of a predetermined shape and distinguishing these from other marks which may occur on the web. This is important where the substrate web is pre-printed, for example with a form layout, and the synchronisation mark is to be located other than in a otherwise empty margin.
  • the intelligence may be incorporated in the sensor itself, or in the control device.
  • the images may be variable images to be printed in a predetermined sequence, the printing of each image at the printing station being initiated by the sensing of an associated synchronisation mark on the substrate web.
  • the printing of each image at the printing station is initiated only by the sensing of an associated synchronisation mark on the substrate web, whereby failure to sense an expected synchronisation mark on the substrate web results in failure to initiate the printing of an image at the printing station.
  • failure to sense an expected synchronisation mark on the substrate web may result in the initiation of the printing of an image at said printing station, albeit based on an extrapolated position calculated from the position of earlier sensed synchronisation marks and their running average inter-distance.
  • the sensor will usually be located in a fixed position. By this arrangement it is possible to sense synchronisation marks associated with the start of a second page, while a first page is still printing. This is in contrast to arrangements such as described in EP 624477 (Canon K K) where a mark detector moves laterally into a parking position as printing continues.
  • One or more further printing stations may be provided, the feed means feeding the substrate web past each printing station in turn, enabling multi-colour images to printed on the web substrate.
  • register control means may be provided for initiating a printing sequence at each printing station other than the first, in response to the start of printing at the first printing station, making use of web-displacement measurement, thereby enabling multi-colour images to be printed in register with each other.
  • the method according to the invention may be used for the printing of identity documents, wherein the web substrate carries watermarks or security marks such as finely detailed images in at least one colour, and the printed images comprise variable data such as alpha-numeric data and multi-colour pictorial images.
  • Other product examples include form printing, the printing of pre-die cut labels, flyers and direct mail documents carrying glued areas or perfume strips.
  • the printer 10 comprises a plurality of digital printing stations 12, 14, 16, 18.
  • Each printing station comprises a rotatable drum having photosensitive surface, an exposure device for image-wise exposing the photosensitive surface, a development unit to form a toner image, a transfer device for transferring the toner image to the substrate web, a cleaning device for removing excess toner form the photosensitive surface and a charging device for preparing the photosensitive surface for further exposure.
  • Such a construction of the printing stations is conventional and is, for example, as described in United States patent No. US 5499093 (Aerens et al. assigned to Xeikon NV), and is not therefore shown in detail.
  • the exposure devices are however indicated at 13, 15, 17, 19. It will be appreciated that the timing of the operation of an exposure device determines the timing of image printing at that printing station, as described in US 5499093.
  • the web 24 carries a plurality of synchronisation marks (see Figure 2).
  • a pair of co-operating drive rollers 28 continuously feed the substrate web 24 past each printing station in turn, enabling multi-colour images to printed on the substrate web 24.
  • a brake (not shown) acting on the roll 22, ensures that the web is under tension as it passes the printing stations.
  • the substrate path through the printer is defined by a number of guide rollers 29.
  • a sensing device 32 is positioned in a stationary position upstream in the transport direction of the first printing station 12 for sensing the synchronisation marks 26 on the web 24.
  • the nature of the sensing device 32 is determined according to the nature of the synchronisation marks on the substrate web.
  • a suitable sensing device is a reflective optical sensing device such as the KEYENCE FU-35FA sensor, with an F-2HA lens and an FS2-65 amplifier.
  • a control device 38 for example in the form of a microprocessor, is provided for initiating a printing sequence at the first printing station 12 in response to the sensing of each of the synchronisation marks.
  • the images are, for example, variable images to be printed in a predetermined sequence, the printing of each image at the first printing station 12 being initiated by the sensing of an associated synchronisation mark 26 on the substrate web 24.
  • an encoder device 37 associated for example with the first printing station 12, is provided to provide output signals to the control device 38 indicative of web displacement.
  • the control device 38 also includes means to determine that a synchronisation mark is missing from within a pre-selectable range wherein normally a mark is to be expected. Where such a mark is missing, a printing sequence is optionally initiated, albeit based on an extrapolated position calculated from the position of earlier marks and their running average inter-distance. Thus any irregularity in the pre-printing of the substrate web 24 is overcome.
  • the printer shown in Figure 1 operates as follows. As the substrate web 24 is drawn off the roll 22, a synchronisation mark thereon eventually passes the sensor 32 and is detected thereby.
  • the control device 38 receives a signal from the sensor 32 that a synchronisation mark has been detected. After a given distance of web travel, the control device sends a signal to the exposure device 13 of the first printing station 12, to initiate a printing sequence.
  • the given distance of web travel between receiving the signal from the sensor 32 and initiating the printing sequence at printing station 12 is pre-calibrated to take account of:
  • the control device 38 initiates a second printing sequence, and so on.
  • the spacing of the synchronisation marks on the web 24 and the lengths of the images to be printed at the printing station 12, need not be regular, since each image is associated with a specific synchronisation mark. In this manner a plurality of images are printed on the web 24, each at a predetermined location in the transport direction relative to an associated one of the synchronisation marks 26.
  • the further printing stations 14, 16 and 18 enable multi-colour images to be printed.
  • Register control means 30 are provided for initiating a printing sequence at each of these further printing stations, in response to the start of printing at the first printing station 12, making use of web displacement measurements thereby enabling multi-colour images to be printed in register with each other. If no printing sequence is initiated at the first printing station 12, no images are printed by the further printing stations 14, 16, 18.
  • the web After passing the last printing station 18, the web passes a toner image fixing station 39 where the images are rendered permanent on the substrate web 24.
  • the web then passes to a cutting device 40 for cutting the web 24 into sheets 42, each cut sheet carrying an image and its associated synchronisation mark.
  • the cutting device is controlled by the control device 38 to cut the web at a predetermined location in the transport direction relative to an associated one of the synchronisation marks 26.
  • the printer 10 may be used for the printing of identity documents, wherein the substrate web 24 carries security data for example in monochrome, and the printed images comprise variable multi-colour pictorial images.
  • the synchronisation marks on the substrate web 24 may take the form of pre-printed synchronisation marks 26 distinguishable in the visible spectrum, watermarks 34 formed in the substrate web, or disconformities such as metal strips 36 incorporated in the substrate web 24.
  • Figure 2 shows, as an example, a portion of substrate web 24 approaching the printer 10.
  • the substrate web is pre-printed with an image shown diagrammatically at 44. In the case of printing identity cards for example, this may be made up of finely detailed images or alpha-numeric data.
  • the substrate passes through the printer 10, where a multi-colour further image shown diagrammatically at 46 is printed, and the web is cut into a sheet 42 of desired length.
  • the newly printed image 46 may be for example a pictorial image of the person to whom the identity card is to apply.
  • the image 46 has been printed at a predetermined location in the transport direction relative to the pre-printed image 44.
  • the printed sheet 42 thus carries both images 44, 46 and the synchronisation mark 26.
  • the synchronisation mark 26 lies in a margin to the image area. This has the advantage that, if desired, such synchronisation marks may be removed by subsequently trimming the sheet.
  • Printed sheets carrying watermarks 34 or metal strips 36 will usually retain these features within the image area. This can be desirable for security reasons.
  • the printer according to the invention may be adapted for duplex printing (i.e. printing on both faces of the substrate web), for example by the provision of further printing stations located on the opposite side of the web, such as in replacement for the guide rollers 29.
  • the senor may be an intelligent sensor capable of recognising synchronisation marks of a predetermined shape and distinguishing these from other marks which may occur on the web.
  • the web 24 carries synchronisation marks 26 which lie within the image area, which area also includes a pre-printed image 44, or may be part of the image.
  • the sensor is able to distinguish the synchronisation marks from the image 44, by being programmed to apply the following criteria. Firstly, the synchronisation marks 26 must have a length in the web travelling direction falling within a configurable range. Secondly, the optical density of the synchronisation marks 26 must fall within a predetermined range relative to the un-printed substrate. The synchronisation marks 26 must be preceded and followed by blank areas 48, 49 of a configurable length. Furthermore, the sensor may be programmed to ignore any marks occurring on the web within a predetermined length range following a detected synchronisation mark. By application of these criteria, the synchronisation marks 26 may be distinguished from pre-printed images 44.
  • a number of synchronisation marks of different configurations may be used in combination, the sensor intelligence being adapted to detect the sequence of such marks.

Claims (12)

  1. Imprimante pour imprimer une pluralité d'images sur un support en bande (24) présentant une pluralité de repères de synchronisation (26, 34, 36), ladite imprimante comprenant :
    un châssis (20) pour un rouleau (22) dudit support en bande (24) ;
    des moyens (28) pour délivrer en continu dudit rouleau (22) ledit support en bande (24) dans une direction de transport passant devant un poste d'impression numérique (12), ledit poste d'impression digitale comprenant un tambour rotatif présentant une surface photosensible, et un dispositif d'exposition (13) pour exposer en image ladite surface photosensible ; et
    un dispositif de détection (32) placé à une position fixe en amont dudit poste d'impression (12) pour détecter lesdits repères de synchronisation (26, 34, 36) sur ladite bande (24) ; caractérisé par :
    des moyens de création de signaux (37) associés audit poste d'impression pour créer des signaux indicatifs du déplacement de la bande ; et
    des moyens de commande (38) pour lancer une séquence d'impression audit poste d'impression (12) en instruisant ledit dispositif d'exposition d'exposer ladite surface photosensible après une distance de déplacement donnée de la bande en réponse d'une détection de chacun desdits repères de synchronisation (26, 34, 36) et en réponse audits signaux indicatifs de déplacement de la bande, ladite distance donnée de déplacement de la bande étant pré-calibrée pour prendre en compte :
    (i) la distance entre ledit dispositif de détection et ledit poste d'impression,
    (ii) la distance parcourue par ladite bande après le lancement de ladite séquence d'impression avant que ledit poste d'impression ne réalise la formation d'une image associée sur ladite bande, et
    (iii) le déplacement longitudinal entre la position dudit repère de synchronisation et le départ souhaité de ladite image associée,
    par laquelle une pluralité d'images est imprimée sur ladite bande (24), chacune à une position prédéterminée dans ladite direction de transport par rapport à un desdits repères de synchronisation associé (26, 34, 36).
  2. Imprimante selon la revendication 1, dans laquelle ledit dispositif de détection (32) est sensible à des repères de synchronisation pré-imprimés (26) sur ledit support en bande (29), des filigranes (34) dans ledit support en bande (24) et/ou des discordances (36) dans ledit support en bande (24).
  3. Imprimante selon la revendication 2, dans laquelle ledit dispositif de détection (32) est sensible aux repères de synchronisation (26) distinguables dans le spectre visible.
  4. Imprimante selon l'une quelconque des revendications précédentes, dans laquelle ledit dispositif de détection est adapté pour distinguer lesdits repères de synchronisation d'autres marquages sur ledit support en bande.
  5. Imprimante selon l'une quelconque des revendications précédentes, comprenant en outre une dispositif de coupe (40) situé en aval dudit poste d'impression (12), pour couper ladite bande (24) en feuilles (42), chaque feuille coupée présentant une image et son repère de synchronisation associé, ledit dispositif de coupe (40) étant commandé par le dispositif de commande (38) pour couper ladite bande à un endroit prédéterminé dans la direction du transport par rapport à l'un des repères de synchronisation associé (26).
  6. Imprimante selon l'une quelconque des revendications précédentes, comprenant un ou plusieurs postes d'impression (14, 16, 18) et dans laquelle lesdits moyens d'alimentation (28) délivrent ledit support en bande (24) passant successivement devant chaque poste d'impression (14, 16, 18) en rotation, pour permettre l'impression d'images polychromes sur ledit support en bande (24).
  7. Imprimante selon la revendication 6, comprenant en outre des moyens de contrôle de repérage (30) pour lancer une séquence d'impression à chaque poste d'impression successif (12, 14, 16, 18), lesdits moyens de contrôle de repérage (30) répondant au début de l'impression au premier poste d'impression (12), permettant ainsi l'impression d'images polychromes en repérage les unes par rapport aux autres.
  8. Procédé d'impression d'une pluralité d'images sur un support en bande (24) présentant une pluralité de repères de synchronisation (26, 34, 36), ledit procédé comprenant une délivrance en continu à partir d'un rouleau (22), dudit support en bande (24) passant devant un poste d'impression numérique (12) dans une direction de transport, ledit poste d'impression numérique comprenant un tambour rotatif présentant une surface photosensible et un dispositif d'exposition pour l'exposition en image de ladite surface photosensible, et le repérage desdits repères de synchronisation (26, 34, 36) sur ladite bande (24) à une position fixe en amont dudit poste d'impression (12) ; caractérisé par:
    la création des signaux indicatifs du déplacement de la bande audit poste d'impression ; et
    le lancement d'une séquence d'impression audit poste d'impression (12) en instruisant ledit dispositif d'exposition d'exposer ladite surface photosensible après une distance de déplacement donnée de la bande en réponse à la détection de chacun desdits repères de synchronisation (26, 34, 36) et en réponse audits signaux indicatifs de déplacement de la bande, ladite distance donnée de déplacement de la bande étant pré-calibrée pour prendre en compte :
    (i) la distance entre ledit dispositif de détection et ledit poste d'impression,
    (ii) la distance parcourue par ladite bande après le lancement de ladite séquence d'impression avant que ledit poste d'impression ne réalise la formation d'une image associée sur ladite bande, et
    (iii) le déplacement longitudinal souhaité entre la position dudit repère de synchronisation et le départ de ladite image associée,
       par lequel une pluralité d'images est imprimée sur ladite bande (24), chacune à une position prédéterminée dans ladite direction de transport par rapport à un desdits repères de synchronisation associé (26, 34, 36).
  9. Procédé selon la revendication 8, dans lequel lesdites images sont des images variables à imprimer dans une séquence prédéterminée, l'impression de chaque image audit poste d'impression (12) étant lancée par la détection d'un repère de synchronisation associé sur ledit support en bande (24).
  10. Procédé selon la revendication 9, dans lequel l'impression de chaque image audit poste d'impression (12) n'est lancée seulement que par la détection d'un repère de synchronisation associé (26, 34, 36) sur ledit support en bande (24), et par lequel l'absence de détection d'un repère de synchronisation attendu (26, 34, 36) sur ledit support en bande, entraíne une défaillance du lancement de l'impression d'une image audit poste d'impression (12).
  11. Procédé selon la revendication 10, par lequel la défaillance de détection d'une repère de synchronisation attendu (26, 34, 36) sur ledit support en bande (24), entraíne le lancement de l'impression d'une image audit poste d'impression (12) sur la base d'une position extrapolée calculée à partir de la position de repères de synchronisation détectés antérieurement et la moyenne du déplacement de leur intervalle.
  12. Procédé selon la revendication 8, pour l'impression de documents d'identité, dans lequel ledit support en bande (24) porte des images sécurisées d'une couleur au moins et lesdites images imprimées comprennent différentes images alphanumériques et/ou illustrations polychromes.
EP19980301297 1997-02-26 1998-02-23 Imprimante pour imprimer une pluralité d'images sur une bande Expired - Lifetime EP0878311B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19980301297 EP0878311B1 (fr) 1997-02-26 1998-02-23 Imprimante pour imprimer une pluralité d'images sur une bande

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP97301251 1997-02-26
EP97301251A EP0861734A1 (fr) 1997-02-26 1997-02-26 Imprimante pour imprimer une pluralité d'images sur une bande
EP19980301297 EP0878311B1 (fr) 1997-02-26 1998-02-23 Imprimante pour imprimer une pluralité d'images sur une bande

Publications (2)

Publication Number Publication Date
EP0878311A1 EP0878311A1 (fr) 1998-11-18
EP0878311B1 true EP0878311B1 (fr) 2002-05-15

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EP19980301297 Expired - Lifetime EP0878311B1 (fr) 1997-02-26 1998-02-23 Imprimante pour imprimer une pluralité d'images sur une bande

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1072900A (en) 1999-11-07 2001-06-06 Indigo N.V. Tandem printing system with fine paper-position correction
EP1254028B1 (fr) 2000-02-06 2003-12-03 Hewlett-Packard Indigo B.V. Imprimante et procede d'impression en tandem
DE60029016T2 (de) 2000-04-18 2007-01-25 Hewlett-Packard Indigo B.V. Vorrichtung zur anzeige einer papierstau- und transportposition
US6739688B2 (en) * 2002-09-25 2004-05-25 Polaroid Corporation Registration error reduction in a tandem printer

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1456467A (en) * 1974-09-12 1976-11-24 Berisfords Ltd Label stock overprinting machine container
US3908542A (en) * 1974-12-26 1975-09-30 Roberts Numbering Company System for printing on a moving web
EP0073132A3 (fr) * 1981-08-17 1985-08-28 Mccorquodale Machine Systems Limited Impression repérée sur feuilles
US5499093A (en) * 1993-06-18 1996-03-12 Xeikon Nv Electrostatographic single-pass multiple station printer with register control
US5464289A (en) * 1994-08-24 1995-11-07 Beaudry; Wallace J. Electrographic label printing system

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