EP0759360B1 - Procédé de commande d'un dispositif d'impression - Google Patents

Procédé de commande d'un dispositif d'impression Download PDF

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Publication number
EP0759360B1
EP0759360B1 EP96108285A EP96108285A EP0759360B1 EP 0759360 B1 EP0759360 B1 EP 0759360B1 EP 96108285 A EP96108285 A EP 96108285A EP 96108285 A EP96108285 A EP 96108285A EP 0759360 B1 EP0759360 B1 EP 0759360B1
Authority
EP
European Patent Office
Prior art keywords
printing
substrate
sensor
transfer cylinder
transfer
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
EP96108285A
Other languages
German (de)
English (en)
Other versions
EP0759360A1 (fr
Inventor
Anton Rodi
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0759360A1 publication Critical patent/EP0759360A1/fr
Application granted granted Critical
Publication of EP0759360B1 publication Critical patent/EP0759360B1/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
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/14—Automatic control of tripping devices by feelers, photoelectric devices, pneumatic devices, or other detectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/08—Tripping devices or stop-motions for starting or stopping operation of cylinders

Definitions

  • the invention relates to a method for controlling a Printing device of a printing press, in which the printing substrates, e.g. B. sheets of paper, over a Funding path to the printing device and the conveyed substrates through a along the conveyor path the pressure device arranged sensor can be detected.
  • the printing substrates e.g. B. sheets of paper
  • the object of the invention is even more reliable to avoid printing out of time with the substrates take place and achieve this without going through To have to accept blank sheets.
  • This task is carried out in a generic method solved according to the invention in that each time the leading edge of a substrate is detected Printing process is started, and in that the Printing stops when the trailing edge of the Substrate is detected.
  • the substrates for example from a feeder successively to a conveyor for conveying the Substrates are transferred to the printing device without an exact delivery time or exact distances between the substrates must be observed. Because every substrate is printed, which runs past the sensor, there are none empty substrates. A committee is created at most, if a too short substrate on the Conveyor is given. In this case, however reliably avoided over the length of the substrate is printed by printing through the trailing edge of the substrate is stopped.
  • the invention is particularly suitable for printing presses digital printing units that have a transfer cylinder which is rotating at a peripheral speed, which are always the same as the conveying speed of the Substrate conveyor is.
  • a printing unit is a printed image at a point on the circumference of the Transfer cylinder to the transfer cylinder upset and elsewhere by that Transfer cylinder to the associated substrate.
  • the printing process takes from its start to transfer of the printed image onto a substrate, thus a certain time.
  • the senor is preferably in one Distance from the transfer point to the substrate arranged, which is equal to the distance between the point to Application of the printed image and the transfer point on The circumference of the transfer cylinder is (where Term "distance” in the case of a non-straight line Substrate conveying path the total length of the substrate movement between the sensor and the transfer point, and with respect on the transfer cylinder is the way along its Scope meant).
  • the printing process is carried out at the moment of detection of the Substrate started, and transfer to the substrate takes place automatically in exactly the right place, without that any times or conveyor speeds must be taken into account or complied with.
  • each time the trailing edge of a substrate is detected also a feeder activates the printing press to a follow-up substrate to be handed over to the conveyor.
  • the But also together with the funding institution or the investors Printing units are positively controlled, or it becomes independent operated by the printing units, so that the throughput through the Working speed of the investor is specified. In old ones In these cases, very short distances between the realize successive arcs. When using digital printing units this enables an optimal Exploitation of their performance.
  • Fig. 1 is a schematic side view of a Printing press, on the basis of which the method according to the invention is explained.
  • a not shown Sheet conveyor which, for. B. a conventional one Conveyor with chains and grabs or one Conveyor belt can be, sheet 4 promotes from the feeder stack 1 rectilinear along the sheet conveying path 3 on the Boom stack 2.
  • a transfer cylinder 5 is arranged adjacent to belongs to a digital printing unit.
  • a writing head 6 of the digital printing unit arranged.
  • the write head 6 is through Signals controlled by a control device 7 based on digitized printed images 8 (e.g. text or graphic).
  • a sensor 9 is arranged for sheet detection, z. Legs Photoelectric barrier.
  • the sensor 9 is in a horizontal distance from the transfer point, d. H. of the Point at which the transfer cylinder 5 to the Bogen inconvenienceweg 3 adjoins, which is equal to the distance between the write head 6 and the transfer point, d. H. equal half the circumference of the transfer cylinder 5.
  • a The output of the sensor 9 is with the control device 7 connected.
  • a sheet draw-off roller 10 pulls one at a time Sheet 4 from the feeder stack 1 and gives it to the Conveying path 3. If the sensor 9 the in the conveying direction F leading edge 4a of the sheet 4 detected, receives the Control device 7 a corresponding signal and starts it Writing on the transfer cylinder 5 by means of Printhead 6. When the leading edge 4a of the sheet 4 the Transfer cylinder 5 reached, begins the transmission of Print image on the sheet 4. If the in the conveying direction F trailing edge 4b of sheet 4 passes sensor 9, changes the output signal of the sensor 9, and the Control device 7 stops the recording. Subsequently the remaining printed image is transferred to sheet 4 and the sheet 4 is placed on the delivery stack 2.
  • Fig. 1 there is only one for clarification single sheet 4 on the conveyor path 3.
  • the sheets 4 are closely followed, for example, at intervals that are the distance between the trailing edge 4b of that shown in FIG. 1 Sheet 4 and the front edge of the feeder stack 1 correspond, each time the sensor 9 the trailing edge 4b detects one of the sheets 4 that Sheet draw-off roller 10 is actuated to form a subsequent sheet to give funding route 3.
  • the write head 6 writes that Print image for the subsequent sheet 4 on the Transfer cylinder 5.
  • the arrangement shown Print head 6 is on the circumference of the transfer cylinder 5 incidentally, only by way of example and is based on practice the respective technical possibilities and requirements, the arrangement of the sensor 9 being adapted to it.
  • a printing unit such as shown in Fig. 1, but several in a row arranged printing units provided.
  • Printing units synchronized with each other, so that with only a sensor 9 comes before the first printing unit.
  • Each Printing unit can also with its own sheet sensor be equipped.
  • the control device 7 can, for. B. a printing press computer be the digitized print images 8 in Control signals for the write head 6 and converts the Control signals the write head 6 depending on the Output signal of the sensor 9 supplies or does not supply.
  • the control device 7 z. B. realized in a way as below with additional reference to Fig. 2 and Fig. 3 is described.
  • control device 7 is one Circuit between a (not shown) Printing press computer and the write head 6 is arranged and which is set up to control the data flow of the digitized print images 8 from the printing press computer the write head 6 as a function of the output signal of the Sensor 9 to disable (enable) or enable.
  • the control circuit performs the one described below Processing by.
  • the control circuit 7 After the start of the printing operation, the control circuit 7 first receives an output signal zero from the sensor 9 and waits for this output signal to change to the positive value (FIG. 3, step 30). At the moment when the rising edge of the output signal of the sensor 9 is received by the control circuit 7, ie at time t 1 , the control circuit 7 releases the data flow of the digitized print images 8 from the printing press computer to the write head 6 (step 31). The control circuit 7 then waits for the output signal of the sensor 9 to return to zero (step 32).
  • control circuit 7 blocks the data flow of the digitized print images 8 to the write head 6 and also actuates the sheet draw-off roller 10 so that this gives a follow-up sheet on conveyor 3 (step 33). Thereafter, processing returns to step 30 and the rising edge of the next output pulse from sensor 9 is waited for.
  • the write head 8 is active in a time interval from t 1 to t 2 , as shown in FIG. 2 (b), and writes a print image on the transfer cylinder 5.
  • the print image is transferred from the transfer cylinder 5 to the sheet 4, which has now reached the transfer cylinder 5.
  • the transfer of the print image from the transfer cylinder 5 to the sheet 4 takes place during a time interval between a time t 3 and a time t 4 , as shown in Fig. 2 (c).
  • the time interval from t 3 to t 4 and the time interval from t 1 to t 2 are of equal length, but offset by a time difference t 3 - t 1 .
  • the time difference t 3 - t 1 corresponds to the time which the front edge 4a of the sheet 4 takes to get from the position of the sensor 9 to the position of the transfer cylinder 5.

Landscapes

  • Controlling Sheets Or Webs (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Handling Of Cut Paper (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Claims (4)

  1. Procédé pour commander un dispositif d'impression appartenant à une machine d'impression dans laquelle des substrats à imprimer sont transportés au dispositif d'impression, sur une trajectoire de transport et les substrats transportés sont détectés par un capteur disposé le long de la trajectoire de transport en amont du dispositif d'impression,
    caractérisé
    en ce que, chaque fois que le bord avant (4a) d'un substrat (4) est détecté, une opération d'impression est mise en marche et en ce que l'opération d'impression est arrêtée lorsque le bord arrière (4b) du substrat (4) est détecté;
  2. Procédé selon la revendication 1,
    dans lequel l'opération d'impression demande du temps depuis son démarrage jusqu'au report de l'image imprimée sur le substrat,
    caractérisé
    en ce que l'opération d'impression est mise en marche aussitôt que le bord avant du substrat (4) est détecté, le capteur (9) étant disposé à une distance du dispositif d'impression (5) qui est telle que le report se produise en synchronisme avec le passage du substrat au droit du dispositif d'impression.
  3. Procédé selon la revendication 2,
    dans lequel l'opération d'impression comprend les phases consistant à déposer une image d'impression sur un cylindre de report dans une zone de la périphérie de ce cylindre de report et à la reporter du cylindre de report au substrat correspondant dans une autre zone,
    caractérisé
    en ce que le capteur (9) est disposé à une distance de la zone de report sur le substrat (4) qui est égale à la distance, mesurée sur la périphérie du cylindre de report (5), entre la zone prévue pour déposer l'image d'impression et la zone de report.
  4. Procédé selon une des revendications précédentes,
    caractérisé
    en ce que, chaque fois que le bord arrière (4b) du substrat (4) est détecté, un margeur (1) de la machine à imprimer est activé pour débiter un substrat suivant sur la trajectoire de transport (3).
EP96108285A 1995-06-30 1996-05-24 Procédé de commande d'un dispositif d'impression Expired - Lifetime EP0759360B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19523879 1995-06-30
DE19523879A DE19523879A1 (de) 1995-06-30 1995-06-30 Verfahren zur Steuerung einer Druckeinrichtung

Publications (2)

Publication Number Publication Date
EP0759360A1 EP0759360A1 (fr) 1997-02-26
EP0759360B1 true EP0759360B1 (fr) 1999-09-15

Family

ID=7765692

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96108285A Expired - Lifetime EP0759360B1 (fr) 1995-06-30 1996-05-24 Procédé de commande d'un dispositif d'impression

Country Status (6)

Country Link
US (1) US6029572A (fr)
EP (1) EP0759360B1 (fr)
JP (1) JPH0911563A (fr)
CN (1) CN1071192C (fr)
AU (1) AU5625496A (fr)
DE (2) DE19523879A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10112946A1 (de) * 2001-03-17 2002-09-26 Nexpress Solutions Llc Verfahren und Vorrichtung zum Erkennen des Vorhandenseins eines Objektes, vorzugsweise eines blatt- oder bogenförmigen Objektes für eine Bedruckung
DE10227766A1 (de) * 2002-06-21 2004-01-15 Nexpress Solutions Llc Verfahren und Steuerungseinrichtung zum Vermeiden von Registerfehlern
JP3687634B2 (ja) * 2002-07-26 2005-08-24 ブラザー工業株式会社 プリンタ
DE10333626A1 (de) 2003-07-24 2005-02-17 Robert Bürkle GmbH Vorrichtung zum Bedrucken von flächigen Werkstücken
FI124205B (en) * 2012-04-24 2014-04-30 Tresu As Coating device, method of operating a coating unit and computer program

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1117973A (en) * 1965-06-07 1968-06-26 Harris Intertype Corp Multiunit printing presses
US3461798A (en) * 1968-06-07 1969-08-19 Harris Intertype Corp Selective and sequential interrupter for a multiple couple printing press
US3608515A (en) * 1968-12-04 1971-09-28 Philip E Tobias Applicator for applying pressure sensitive adhesive and other coating materials to sheet items
DE6900864U (de) * 1969-01-10 1969-07-10 Fritz Connerth Halterung zum aneinanderbefestigen von mindestens zwei zueinander senkrecht angeordneten holzplatten
JPS527348B1 (fr) * 1970-01-09 1977-03-01
US4037952A (en) * 1973-08-30 1977-07-26 Rank Xerox Ltd. Apparatus for liquid development of cut sheet electrostatographic copies
CH673808A5 (fr) * 1984-09-28 1990-04-12 Contraves Ag
JPH0395568A (ja) * 1989-09-08 1991-04-19 Canon Inc 画像形成装置
JPH04327444A (ja) * 1991-04-26 1992-11-17 Sanyo Electric Co Ltd 画像形成装置
CN1049182C (zh) * 1992-09-19 2000-02-09 琳得科株式会社 用于印刷装置的模切装置
FR2702998B1 (fr) * 1993-03-26 1995-06-16 Cuir Jean Pierre Installation pour l'impression feuille à feuille et ligne d'impression correspondante.
IT1262660B (it) * 1993-09-10 1996-07-04 T S C S R L Macchina decoratrice - smaltatrice rotativa per piastrelle ceramiche.

Also Published As

Publication number Publication date
JPH0911563A (ja) 1997-01-14
CN1071192C (zh) 2001-09-19
AU5625496A (en) 1997-01-09
DE19523879A1 (de) 1997-01-02
DE59603053D1 (de) 1999-10-21
US6029572A (en) 2000-02-29
EP0759360A1 (fr) 1997-02-26
CN1141237A (zh) 1997-01-29

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