EP0388697A2 - Procédé et dispositif pour la fixation d'un champ de mesure pour la détermination de l'épaisseur de la couche de mouillage d'une plaque d'impression offset - Google Patents

Procédé et dispositif pour la fixation d'un champ de mesure pour la détermination de l'épaisseur de la couche de mouillage d'une plaque d'impression offset Download PDF

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Publication number
EP0388697A2
EP0388697A2 EP90104179A EP90104179A EP0388697A2 EP 0388697 A2 EP0388697 A2 EP 0388697A2 EP 90104179 A EP90104179 A EP 90104179A EP 90104179 A EP90104179 A EP 90104179A EP 0388697 A2 EP0388697 A2 EP 0388697A2
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EP
European Patent Office
Prior art keywords
measuring
offset printing
printing plate
particular according
vertical
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.)
Withdrawn
Application number
EP90104179A
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German (de)
English (en)
Other versions
EP0388697A3 (fr
Inventor
Helmut Prof. Dr. Dr.-Ing. Kipphan
Josef Haase
Werner Dipl.-Ing. Joss
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 EP0388697A2 publication Critical patent/EP0388697A2/fr
Publication of EP0388697A3 publication Critical patent/EP0388697A3/fr
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0063—Devices for measuring the thickness of liquid films on rollers or cylinders

Definitions

  • the invention relates to a method for determining a measuring location lying in a color-free area for the detection of the dampening solution layer thickness on the surface of an offset printing plate, wherein a measuring head scans the plate surface in the search run and an evaluation of the measurement data determined thereby takes place.
  • a measuring head performs searches on the moistened offset printing plate during printing in order to record the distribution of the dampening solution layer thickness or amount. After finding the critical zone corresponding to the current pressure conditions, which is determined by the lowest amount of dampening solution in an image-free position, the measuring head is positioned there. The amount of dampening solution is then regulated in such a way that the predetermined target value is set at the determined position. If the pressure conditions change, a new search for a new critical zone, if any, is triggered after a certain calming time. So there has to be continuous monitoring of the entire plate surface. During the search phase for the suitable measuring location, there is a risk of waste production, since the regulation process is interrupted during this time.
  • the measuring head can be used to identify printing or non-printing plate locations on an offset printing plate and thus automatically adjust the position of the measuring device to a non-printing plate area.
  • the measurement is carried out by scanning the offset Pressure plate both in the circumferential direction and in the direction of the plate cylinder axis.
  • the invention is based on the object of specifying a method of the type mentioned at the outset which, without continuous monitoring of the offset plate surface, permits an optimal determination of a measuring location for the detection of the dampening solution layer thickness.
  • the measurement location can be determined according to the criteria mentioned before the actual printing process begins.
  • a start-up phase which only leads to the determination of the measurement location, as well as constant monitoring to find critical zones and a possibly necessary change of the measurement location according to DE-OS 36 36 507 are avoided.
  • the procedure according to the invention is now such that the measurement location itself is in a color-free, ie image-free area of the offset printing plate.
  • the location of the measurement is not determined simply by automatically finding the color-free area, but all color-free areas are examined with regard to their surroundings (neighborhood areas).
  • the color-free area which lies in a vertical zone of the offset printing plate with as little average area coverage as possible is then selected as the measuring location.
  • This selection criterion ensures that the measurement location is located in an area of the offset printing plate which transfers relatively little ink, ie the dampening solution used is essentially present in this area.
  • Incorrect measurements during the subsequent determination of the dampening solution layer thickness to determine the actual value for the dampening solution control are carried out at the determined measuring location Way almost excluded.
  • the deposit of ink particles in the dampening solution occurring in border areas, which can lead to incorrect determination of the actual value when the dampening solution is guided, is avoided at the measuring location found according to the invention on the basis of the criterion mentioned.
  • An optically operating measuring head is preferably used, which has an illumination device which throws light directed onto the surface of the offset printing plate via an illumination optics.
  • the light reflected from the printing plate is detected via a line of photodiodes.
  • the radiation intensities determined at the individual photodiodes of the diode row are processed in an evaluation unit.
  • the evaluated data show perfectly printing and non-printing areas and their area coverage on the offset printing plate surface.
  • the measurement location is in an area with the smallest possible coverage gradient in the horizontal direction (horizontal zone).
  • the respective area coverage gradient is determined in the horizontal direction.
  • the area gradient determines the change in area along the path.
  • the color-free area is selected as the measuring location, the area of which lying in the horizontal direction has the smallest possible surface coverage gradient.
  • the measurement location is in an area with a vertical coverage gradient with the smallest possible area coverage gradient. Accordingly, the above-described procedure is also carried out in the vertical direction, so that each color-free area that can be used as a measuring point is considered with regard to its environment is examined in all directions with respect to the area coverage gradient.
  • the procedure can be such that the scanning takes place with a measuring track width which is as large as the width of the vertical or horizontal zone.
  • the measuring track width of the measuring head is smaller than the width of the vertical or horizontal zone examined in each case. Accordingly, several measurement tracks, preferably parallel to one another, can lie within a vertical or horizontal zone.
  • the offset printing plate is clamped on the plate cylinder of an offset printing machine, and thus the vertical zone extends in the circumferential direction and the horizontal zone in the axial direction of the plate cylinder.
  • the measuring location can therefore be found in the offset printing press on the printing plate already clamped on the plate cylinder before the actual printing process begins.
  • the measuring head for determining the measuring location is preferably the same device which also carries out the dampening solution layer thickness detection in the subsequent printing process. As a result, the outlay on equipment is kept low.
  • the procedure can be such that the measuring head is displaced by an axial path which preferably corresponds to the width of the vertical zone after each rotation of the plate cylinder.
  • successively adjacent vertical zones of the offset printing plate running in the printing direction are recorded.
  • the axial offset is preferably carried out when the measuring head is opposite the plate clamping channel of the plate cylinder.
  • the entire associated vertical zone has already been detected by one revolution of the plate cylinder, or several adjacent measuring runs are necessary to scan the entire width of an associated vertical zone.
  • a corresponding axial offset of the measuring head is of course necessary after each rotation of the plate cylinder.
  • a further possibility for scanning the offset printing plate is that the measuring head is continuously moved in the axial direction while the plate cylinder is rotating. Accordingly, the search path on the offset printing plate surface consists of a helical path. If the axial path traveled during a plate cylinder rotation corresponds to the width of the field captured by the measuring head, a gap-free scanning is ensured. Due to the helical path, the individual measuring tracks are inclined to the vertical direction of the offset printing plate. Since the individual measurement data are stored in a matrix, it is possible, however, when evaluating them, for example to only read out the measurement data of one vertical zone, that is to say, during the readout process, not to proceed in the chronological sequence of the data reading in along the inclined measurement track. The result is that this results in a fictitious change in the direction of the measurement track, namely from the direction inclined to the vertical in the vertical direction.
  • the procedure can also be such that the measuring head is moved continuously in the axial direction and after each axial pass the plate cylinder is rotated by an angular step, preferably corresponding to the width of the horizontal zone. Accordingly, horizontal zones or partial widths thereof lying across the printing direction are successively detected by the measuring head.
  • the measuring run is carried out several times and that the measuring data of the same measuring point are averaged. This ensures statistical validation of the measurement data; a measurement error that may have occurred during a measurement run then disappears or is no longer so noticeable.
  • the measurement tracks are slightly offset in the case of multiple measurement runs. This slight offset of two successive measurement tracks also reduces the possibility of an incorrect measurement; the measurement zone is virtually enlarged. If, as described above, there are several adjacent measurement tracks within a vertical or horizontal zone, a different weighting of the individual measurement tracks can also take place, according to a development of the invention, which has a corresponding effect on the result of the relevant horizontal or vertical zone . Preferably, the measurement data of several adjacent measurement tracks of a vertical or horizontal zone are averaged over the width of the corresponding vertical or horizontal zone.
  • the method according to the invention requires a color-free area for determining the measuring location.
  • a reference value is obtained by measuring on the color-free edge of the offset printing plate. If measurement data are determined in the subject that correspond to this reference value, a color-free area must be assumed.
  • the location of the measurement location can be determined in such a way that it is in an area with the smallest possible change in area coverage gradient. If one assumes an area of coverage F D (x, y), the gradient of the area of coverage results where x represents the vertical and y the horizontal coordinate direction.
  • the invention is further characterized by a method for determining a measuring location lying in a color-free area for the detection of the dampening solution layer thickness on the surface of an offset printing plate, wherein a measuring head scans the plate surface in the search run and an evaluation of the measurement data determined thereby takes place and wherein a matrix of the area coverage is determined on the offset printing plate and the measurement data are evaluated in such a way that the measurement location is in a vertical zone with as little average area coverage as possible and the neighboring areas of the measurement location have the smallest possible area coverage gradient in the horizontal direction and the vertical direction.
  • This procedure leads to a determination of the measuring location in a color-free area, the neighborhood areas of which have the least possible color guidance and the least possible change in color guidance.
  • the average area coverage of the individual vertical zones is found by averaging the measurement data recorded in the individual vertical zones. In this way, an average area coverage profile can be determined transversely to the printing direction by lining up the individual vertical zone values. If several vertical zones have an equally small mean area coverage, the vertical zone to be determined for the further procedure is selected by considering the adjacent zones in each case with regard to an as small as possible mean area coverage gradient lying transverse to the printing direction.
  • the measurement location on the color-free edge of the offset printing plate is selected.
  • the subject zone adjoining the edge region is then examined for the smallest possible area coverage, preferably also the smallest possible area coverage gradient.
  • the method according to the invention can also be implemented outside the offset printing press.
  • the evaluation of the matrix protocols of plate readers offers the possibility of defining a measuring location according to the criteria mentioned.
  • the CPC-3 system sold by the applicant can be used. 22x32 area coverage matrix values are available. This area coverage matrix is then evaluated in accordance with the above-mentioned procedure. From the matrix of the area coverage values z. B. to determine a color-free area in a zone of small medium area coverage, in the vicinity of which the area coverage gradient changes only slightly.
  • the determined data can, for example, be stored on cassettes in order to then automatically determine the measuring position of a sensor which detects the dampening solution layer thickness after being read into the machine control station of the offset printing press.
  • the individual ink zone openings of the inking unit of the offset printing press are already fixed in a print to be carried out, these can be used instead of the determination of the vertical zone with the least area coverage.
  • the vertical zone to which the smallest color zone opening is assigned is used as the selected vertical zone. In this respect, after defining this vertical zone, you can continue with the determination of the adjacent color zone gradients.
  • the procedure described so far leads to an automatic determination of the measuring location and positioning of the dampening solution layer thickness sensor.
  • the operator may input the coordinates of the measuring location by means of a sample sheet of the print from the machine control panel of the offset printing press. It is possible for the operator to only indicate the coordinates of the measuring location found by automatic evaluation (e.g. plate reader).
  • the sample sheet is used for orientation.
  • a special variant consists, however, in that the operator carries out a visual evaluation of the offset printing plate or the sample sheet in such a way that the measuring location lying in a color-free area lies in a zone with the lowest possible average surface coverage. This means that no sensor evaluation is carried out, but the operator uses the evaluation criteria according to the invention by visual evaluation.
  • the visual evaluation determines the measuring location in an area which has the smallest possible area coverage gradient in the horizontal direction and / or vertical direction. If the operator has selected the measuring location by visual evaluation, his coordinates must be determined and these must be entered into the offset printing machine via the control panel so that the dampening solution layer thickness sensor can approach this point.
  • a light grid determining the coordinates is preferably projected onto the sample sheet or onto the offset printing plate.
  • the coordinates of the measuring location may be entered by designing the table which receives the offset printing plate or the sample sheet as a digitizing tablet. The selected measuring location is thus transmitted to the offset printing press simply by moving to the selected location (touch panel).
  • the method according to the invention is preferably carried out on a dry offset printing plate.
  • the measurement location it is also conceivable for the measurement location to be determined on a moist offset printing plate. The latter is always possible if the measuring head used is not affected by the existing dampening solution layer when evaluating the area coverage.
  • a signal triggering the measurement is preferably emitted at the beginning of the offset plate each time the plate cylinder is rotated. Furthermore, the measurement is interrupted when it passes the offset plate end.
  • the invention further relates to a device for determining a measuring location lying in a color-free area for the detection of the dampening solution layer thickness on the surface of an offset printing plate, with a measuring head scanning the plate surface, the measuring data of which are processed by an evaluation unit, the evaluation unit being the measuring data selects such that the measurement location is in a vertical zone of the offset printing plate with the lowest possible mean area coverage and preferably in an area with the smallest possible area coverage gradient in the horizontal direction (horizontal zone) and / or vertical direction (vertical zone).
  • the measurement location is determined at each printing unit. It may well be the rule that the measuring locations on the plates corresponding to the different color separations do not match.
  • Fig. 1 shows - in a schematic representation - a plate cylinder 1 of a printing unit of an offset printing machine.
  • On the plate cylinder 1 is one Offset printing plate 2 attached.
  • the surface 3 of the offset printing plate 2 is optically scanned by a measuring head 4 of a measuring device 5, the measuring device 5 comprising an evaluation unit 6.
  • the output 7 of the evaluation unit 6 is connected to a control device (not shown) of the offset printing press, with the aid of which the dampening solution layer thickness on the surface 3 of the offset printing plate 2 is regulated with regard to a predetermined setpoint value during the printing process.
  • the surface 3 of the offset printing plate 2 is divided into a plurality of vertical zones 8 and a plurality of horizontal zones 9.
  • the resulting rectangular areas 10 represent the respective detection area of the measuring head 4.
  • the offset printing plate 2 is first scanned by the measuring head 4 in the search run. This can be done in different ways:
  • FIG. 2 shows a schematic view of an offset printing plate 2, which is mentally removed from the plate cylinder 1, the search being carried out in such a way that first the measuring head 4 moves continuously in the axial direction 11, that is to say in the direction of the horizontal zones 9, and after each Axial pass of the plate cylinder 1 is rotated by an angular step corresponding to the width of the horizontal zone 9, so that the meandering search path indicated in FIG. 2 results.
  • FIG. 3 shows a preferred, different search option.
  • an offset printing plate 2 which is mentally removed from the plate cylinder 1, is shown. H. it is now in its flat form.
  • the search begins, for example, in the upper left corner of the offset printing plate 2 and leads in a vertical direction 12 from the upper plate edge 13 to the lower plate edge 14. This is done by rotating the plate cylinder 1. After each revolution, the measuring head is moved by one of the widths of the respective one Vertical zone 8 corresponding axial path offset. This is indicated in FIG. 3 with dashed lines.
  • FIG. 4 shows - for better understanding - the offset printing plate 2 in a shape spanned on the plate cylinder 1. This described procedure leads to a scanning of the surface 3 of the offset printing plate 2 along a helical line.
  • the offset printing plate 2 is attached to the plate cylinder 1 as shown in FIG. 1. Subsequently, the preferably dry surface 3 of the offset printing plate 2 is scanned (scanned) with the measuring head 4 according to one of the abovementioned search options (FIGS. 2 to 4).
  • the measuring device 5 has a lighting device (not shown in more detail), which throws light directed onto the surface 3 of the offset printing plate 2 via an optical lens system. That from the offset printing plate 2 reflected light is detected by the measuring head 4 and directed to a photodiode array located in its interior. Corresponding measurement data can be derived from the radiation intensities determined at the individual photodiodes of the photodiode row.
  • the measuring device 5 permits detection of the surface structure of the offset printing plate 2 with regard to printing and non-printing sections.
  • the area coverage that is to say the color guide, that is present in the later printed product in accordance with the reflected light.
  • Area coverage is to be understood as the percentage measure which is covered with printing ink within a defined grid area (ratio of the printing area to the non-printing area in a grid area).
  • the stored data is then evaluated with a computer program in order to determine at least one measuring location 17 on the surface 3 of the offset printing plate 2, at which the dampening solution layer thickness is measured in the subsequent printing process, in order to determine the actual value for the previously explained control method determine.
  • This location 17 is determined according to the criteria according to the invention:
  • the measuring head 4 searches the surface 3 of the offset printing plate 2 for color-free areas. In order to recognize this, the measuring head 4 forms a reference value by approaching the color-free edge of the offset printing plate 2. Has an area of the subject of the offset printing plate 2 measurement data that correspond to the reference value, there is no color. 5 shows a plan view of the offset printing plate 2 for better understanding. The pressure-free edge is designated by 20. This borders the printed surface 21 (subject). Color-guiding areas 22 (solid or screen areas) are also shown. The ink-free or non-printing area that fulfills certain criteria according to the invention is defined as the measuring location 17 for the detection of the dampening solution layer thickness. These criteria are as follows:
  • the neighboring areas of the color-free area provided as the measuring location must each have the smallest possible area coverage gradient, i. H. there must be areas with the least possible change in color. Overall, it is thus ensured that there is as little color guidance or change in color guidance as possible around the color-free region to be selected as the measuring location, so that the dampening solution guidance is not "disturbed" by the presence of large amounts of ink close to the distance, which could result in falsification of the measured values.
  • the measuring head 4 is moved in the axial direction 11 from one plate edge 15 to the other plate edge 16 for measuring data acquisition, while the plate cylinder 1 rotates at the same time.
  • Fig. 4 shows - for better understanding - the offset printing plate 2 in a corresponding, on the plate cylinder 1 stretched shape. The procedure described leads to a scanning of the surface 3 of the offset printing plate 2 along the helix. If the axial offset corresponds to the width of a vertical zone 8 after each revolution, a complete search is carried out.
  • FIGS. 6, 7 and 8 again illustrate the method according to the invention.
  • the surface 3 of the offset printing plate 2 is scanned in the vertical direction 12, that is to say along the vertical zones 8, by means of the measuring head 4. Depending on the structure of the device, this can take place on the flat offset printing plate 2 or else in its bent state clamped onto the plate cylinder 1.
  • the measured values recorded during the scanning of the individual, color-free areas of the vertical zones 8 are fed to the evaluation device 6, which determines an average area coverage for each vertical zone 8.
  • "Average area coverage” is to be understood as the mean value of the area coverage of the associated vertical zone 8. According to the invention, only that vertical zone 8 is selected that has the smallest mean area coverage. 6a shows that the measured value 17 lies in the third vertical zone 8 from the left.
  • the measuring location 17 itself represents a color-free area 10.
  • diagram 6b the respective mean area coverings for the individual vertical zones 8 are plotted. Starting from the plate edge 15, the average area coverage decreases in a step-like manner until the lowest average area coverage is present in area I. Subsequently, the average area coverage increases again.
  • the vertical zone 8 designated I is selected accordingly.
  • the area surrounding the measuring location 17 has the smallest possible surface coverage gradient. In this regard, the vertical and horizontal zones emanating from the measuring location 17 can be examined. This is illustrated in Fig. 6a light.
  • the surroundings are examined in the vertical direction (arrows 23 and 24) and in the horizontal direction (arrows 25 and 26) with regard to the change in the area coverage (area coverage gradient).
  • the respective coverage gradient is determined along the corresponding vertical zone and horizontal zone section. If the respective area coverage gradient is small, the area 10 can be selected as the measurement location 17.
  • FIG. 7 shows a representation corresponding to FIG. 6b. It is assumed that the mean area coverage in two vertical zones 8 having color-free areas, namely in areas II and III, is of the same size, these two values representing the lowest values. If one now looks at the neighboring zones of area II, the mean area coverage here is smaller than with regard to area III, since in the latter the vertical zone 8 to the right of it has a considerable average area coverage value. Accordingly, in accordance with the method according to the invention, area II is used as the selected vertical zone 8 and — as already explained above — a color-free area is now defined here as the measuring location 17.
  • the measurement described can also be carried out outside the offset printing machine by placing the flat offset printing plate 2 on a measuring table and then moving it with the measuring head 4.
  • a pressure plate reader is preferably used.
  • a matrix of the surface covering structure is thus recorded.
  • the evaluation of the area coverage matrix is then carried out analogously to the procedure described above.
  • the mean area coverings are determined, - if known - also make a statement about the ink zone openings. If, in the axial direction, the ink zone openings are known for the subsequent printing process of a printing unit, the vertical zone which has the smallest ink zone opening can be equated with the ink zone with the lowest mean area coverage. That is, the vertical zone thus presented is selected. The procedure is then that the measuring head is positioned in this selected zone with a minimal ink zone opening and a measurement is carried out with respect to the neighboring zones with respect to the smallest possible area coverage change around an ink-free area.
  • the selection of the measuring location can also be carried out in a relatively simple manner by the printer. This happens e.g. B. outside the offset printing press. It is advantageous if the position of the measuring location is determined by means of a grid projected by an optical system. The coordinates of this measuring location can then be fed from the printer using the keyboard of the offset printing press, so that the measuring head of the offset printing press provided for the measurement of the dampening solution layer thickness can move to a corresponding position for the measurement in the subsequent printing process.
  • the measuring location found on the flat, offset printing plate located outside the offset printing press can be transmitted to the measuring machine-side measuring head by data transmission, a special measuring table design being provided as a digitizing tablet outside the machine. This enables the realization of a grid field, so that the associated location data are transmitted in digitized form to the printing press and trigger an automatic position adjustment of the measuring head there for determining the dampening solution layer thickness.
  • FIG. 8 shows a flow diagram of the method according to the invention. It begins with block 30, which represents the start. Then, in block 31, color-free areas are searched for on the offset printing plate 2. For this purpose, a reference signal is formed in block 32. This is done by scanning the color-free plate edge of the offset printing plate 2. If measurement data of the subject correspond to the reference signal, then color-free areas can be assumed.
  • the block 33 embodies the scanning of the vertical or horizontal zones 8, 9. The measured data determined are stored. The vertical zone with the lowest mean area coverage is selected by appropriate evaluation according to block 34. The prerequisite is that this vertical zone 8 has at least one color-free area 10. This color-free area 10 then forms the measurement site, corresponding to block 37. According to a development of the invention, however, the horizontal environment (block 35) and / or the vertical environment (block 36) of the selected color-free area 10 can also be examined with regard to the smallest possible area coverage gradient.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Rotary Presses (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Methods (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP19900104179 1989-03-22 1990-03-03 Procédé et dispositif pour la fixation d'un champ de mesure pour la détermination de l'épaisseur de la couche de mouillage d'une plaque d'impression offset Withdrawn EP0388697A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3909401A DE3909401C2 (de) 1989-03-22 1989-03-22 Verfahren zur Festlegung eines Meßortes für die Feuchtmittel-Schichtdickenbestimmung einer Offset-Druckplatte
DE3909401 1989-03-22

Publications (2)

Publication Number Publication Date
EP0388697A2 true EP0388697A2 (fr) 1990-09-26
EP0388697A3 EP0388697A3 (fr) 1991-04-10

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Application Number Title Priority Date Filing Date
EP19900104179 Withdrawn EP0388697A3 (fr) 1989-03-22 1990-03-03 Procédé et dispositif pour la fixation d'un champ de mesure pour la détermination de l'épaisseur de la couche de mouillage d'une plaque d'impression offset

Country Status (5)

Country Link
US (1) US5108186A (fr)
EP (1) EP0388697A3 (fr)
JP (1) JPH03101939A (fr)
CA (1) CA2009644C (fr)
DE (1) DE3909401C2 (fr)

Cited By (5)

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DE19518660A1 (de) * 1995-05-20 1996-11-21 Koenig & Bauer Albert Ag Verfahren zur Regelung einer Feuchtmittelmenge
EP1157838A1 (fr) * 2000-05-17 2001-11-28 Baldwin Jimek AB Procédé de contrôler de la quantité de solution de mouillage dans une machine à imprimer
DE10206944A1 (de) * 2002-02-19 2003-09-04 Oce Printing Systems Gmbh Verfahren und Einrichtung zum Drucken, wobei die Dicke der Feuchtmittelschicht gemessen und reduziert wird
WO2007147405A2 (fr) * 2006-06-23 2007-12-27 Dieter Kirchner Forme de test pour déterminer l'état et le réglage du système du dispositif de mouillage d'une machine d'impression offset et procédé de réglage
EP2085224A2 (fr) 2008-02-01 2009-08-05 manroland AG Imprimante et procédé de coordination des réglages des mécanismes de coloration et de mouillage

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DE4228904A1 (de) * 1992-08-29 1994-03-03 Heidelberger Druckmasch Ag Verfahren zum Prüfen von Druckformen vor dem Druck
FI95888C (fi) * 1993-04-26 1996-04-10 Valtion Teknillinen Menetelmä painatuksen laadun valvomiseksi
DE4444269A1 (de) * 1993-12-20 1995-06-22 Ryobi Co Feuchtevolumen-Steuerungsvorrichtung für eine Offsetpresse
DE19602103B4 (de) * 1996-01-22 2006-05-04 Heidelberger Druckmaschinen Ag Verfahren zum Bestimmen von Meßorten für eine Abtastung eines mehrfarbigen Druckbildes zum Steuern oder Regeln einer Farbgebung einer Druckmaschine
US20020131058A1 (en) * 2001-03-17 2002-09-19 Luxem Wolfgang Eberhard Procedure and device for measuring the thickness of a liquid layer
DE10212076A1 (de) * 2002-03-19 2003-10-16 Nexpress Solutions Llc Verfahren und Einrichtung zum Messen der Dicke einer Flüssigkeitsschicht
DE102013001083A1 (de) * 2012-02-17 2013-08-22 Heidelberger Druckmaschinen Ag Druckplatte für Offsetdruck mit Feuchtmittel

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DE3636507A1 (de) * 1986-10-27 1988-04-28 Grapho Metronic Gmbh & Co Verfahren zur einstellung des befeuchtungsgrades des plattenzylinders einer offsetdruckmaschine

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DE19518660A1 (de) * 1995-05-20 1996-11-21 Koenig & Bauer Albert Ag Verfahren zur Regelung einer Feuchtmittelmenge
US5713286A (en) * 1995-05-20 1998-02-03 Koenig & Bauer-Albert Aktiengesellschaft Method for regulating dampening agent
EP1157838A1 (fr) * 2000-05-17 2001-11-28 Baldwin Jimek AB Procédé de contrôler de la quantité de solution de mouillage dans une machine à imprimer
DE10206944A1 (de) * 2002-02-19 2003-09-04 Oce Printing Systems Gmbh Verfahren und Einrichtung zum Drucken, wobei die Dicke der Feuchtmittelschicht gemessen und reduziert wird
WO2007147405A2 (fr) * 2006-06-23 2007-12-27 Dieter Kirchner Forme de test pour déterminer l'état et le réglage du système du dispositif de mouillage d'une machine d'impression offset et procédé de réglage
WO2007147405A3 (fr) * 2006-06-23 2008-04-03 Dieter Kirchner Forme de test pour déterminer l'état et le réglage du système du dispositif de mouillage d'une machine d'impression offset et procédé de réglage
EP2085224A2 (fr) 2008-02-01 2009-08-05 manroland AG Imprimante et procédé de coordination des réglages des mécanismes de coloration et de mouillage
EP2085224A3 (fr) * 2008-02-01 2009-10-21 manroland AG Imprimante et procédé de coordination des réglages des mécanismes de coloration et de mouillage

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US5108186A (en) 1992-04-28
CA2009644A1 (fr) 1990-09-22
CA2009644C (fr) 1994-01-25
JPH03101939A (ja) 1991-04-26
DE3909401C2 (de) 1994-02-10
EP0388697A3 (fr) 1991-04-10
DE3909401A1 (de) 1990-09-27

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