EP0401241A1 - Verfahren zur erfassung von druckflächenbedeckungsdaten. - Google Patents
Verfahren zur erfassung von druckflächenbedeckungsdaten.Info
- Publication number
- EP0401241A1 EP0401241A1 EP89902230A EP89902230A EP0401241A1 EP 0401241 A1 EP0401241 A1 EP 0401241A1 EP 89902230 A EP89902230 A EP 89902230A EP 89902230 A EP89902230 A EP 89902230A EP 0401241 A1 EP0401241 A1 EP 0401241A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- zone
- printing
- line
- values
- screws
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- B41F33/0027—Devices for scanning originals, printing formes or the like for determining or presetting the ink supply
Definitions
- the invention relates to a method and a device for acquiring printing area coverage data for controlling so-called ink fountain keys on offset printing machines according to the preamble of claims 1 and 5.
- the amount of ink added for the individual printing cylinders, which are in turn divided into zones, can be set on offset printing presses using so-called ink zone control screws (zone screws).
- the zone screws are preset accordingly for the color values, and during the start of printing alternately by adjusting and repeated inspection of the printed pages, the zone screws are adjusted to the correct amount of ink.
- this ink supply can be automatically controlled from a central program. Coverage values determined before the start of printing can also be entered. This data is then using so-called color density measuring devices, for.
- the object of the invention is therefore to record the setting data for the zone screws more easily and more precisely and to make them available for the printing press.
- the invention achieves this in that in the line-by-line recording of films for the production of offset printing forms or in the line-by-line exposure of offset printing plates from the recording data, i. H. Density values of a line, the setting values for the individual zone screws are determined and saved directly from the density values or are passed on directly to the printing press. Before the setting values are passed on to the printing press, density values are advantageously implemented by means of masks which relate the assignment of the printing area in relation to type area, type area in the pages and in relation to the register system of the printing machine and to the characteristic data of a page contains the setting values of the zone screws determined from the sealing values in the page, converted into the setting values. These masks can preferably be created by means of a PC, the setting values temporarily stored, or given directly to the zone control of the printing press via an interface. Further refinements of the invention are specified in patent claims 1-7.
- press fax machines for example in so-called press fax machines, are used in which a newspaper page or color separations are scanned by means of flatbed scanners and transferred to another location and can be recorded line by line as a film, offset plate or as a color separation using flat bed recorders.
- Such devices are e.g. B. in the prospectus, press fax system transmission of Druck ⁇ templates, the company Dr.-Ing. Rudolg Hell GmbH, Kiel, Germany, Order No. 28294 (2d-H-8802).
- Fig. 1 shows a schematic diagram of a system for the transmission of
- FIG. 3 shows a basic structure of a flatbed recorder
- Fig. 5 is a schematic representation of the decomposition of a
- Fig. 6 is a graphical representation of the masks for the type area and the zones.
- Fig. 1 shows a system for the transmission of complete newspaper pages from one location (sending location) to another (receiving location), in which by means of a scanner (1), which is used to scan the documents to be transmitted, so-called scan data obtained, via a Ü Transfer transmission path (2) to a recorder (3) connected to the transmission location at the receiving location and recorded there by the recorder (3) become.
- the transmission can take place directly via line, by means of data compression, via radio, satellite or other transmission links.
- So-called press fax machines can be used, for example, in which a newspaper page or color separations are scanned at the sending location using a flatbed scanner, for
- FIG. 2 shows a flatbed scanner of such a system with a laser light source (4), the beam (5) of which is directed via a mirror (6), an optical system (7), a further mirror (8) and a further optical system (9) and another Mirror (10) reaches a beam expander (11), the exit beam of which is deflected via a mirror polygon wheel rotating in the direction of the arrow (12) onto a scanner lens (F-theta lens) (13).
- the multiple beam deflection by means of the mirrors (6, 8 and 10) results in a relatively small spatial configuration of the optical system.
- the beam deflected by the polygon mirror (12) is directed via a mirror (14) onto the template (15) to be scanned, which is arranged on a table (18) which can be moved on guides (17) in the direction of the arrow (16).
- the table is driven by a motor (19) via a spindle (20).
- the light beam moves line by line along the line (21), and the light reflected from the original is fed to a photoelectric converter (24) by means of a light receptacle (22), a light guide (23), at the output of which one Line (25) the electrical scanning signal, which is present as so-called scan data, which is transmitted to the recorder.
- Such light shots are e.g. B. described in EP B1 0064736.
- FIG. 3 shows in an analogous manner the recorder on the receiving side, which in principle has the same optical structure as the scanner in For this reason, the same reference numbers have been used in FIG. 3, and what has been said about FIG. 2 applies to the beam guidance.
- the laser (3) does not emit constant light, but is modulated with the transmitted scan data or it emits a constant light beam, and a separate modulator, not shown, is provided in the beam path in order to add the light as a function of the scan data modulate.
- the modulated light beam moves along the line (21) over the film (15 '), which is moved further from the table (18) in the direction of the arrow (16).
- the recorder (3) has a controller (31) which is connected to the recorder via a bidirectional data line (32) and via a further control line (5) to a PC 60 which has a software controller (61) and an operating keyboard (62 ) having.
- the hardware control (3) of the recorder has a memory (31 1) and a processor (312), by means of which the recording data of a page or a color separation from the line memory (33) of the recorder (3) are called up and in the corresponding density ⁇ values for zone control are converted. This conversion takes place in such a way that the line is broken down into individual segments and evaluated with corresponding line segments of the following lines with respect to the density values of the individual pixels contained in these segments. The result is an average density value, which is representative of these combined line segments and is stored.
- a pattern of density values is thus generated for an entire newspaper page, which then uses the masks, one of which reproduces the type area and the other the position of the zone screws with respect to the type area, and thus one exact assignment of the density values to the zone screws is achieved.
- These masks also take into account the press register in relation to the type area.
- the identifiers of the individual pages transmitted can also be logged and recorded by the PC 60, assigned exactly to the zone screw setting data and passed on.
- FIG. 5 schematically shows a transmitted page (50), from the recording data of which an average density value is determined for each segment (51) or field (52) which results from several lines. Since the transmission from the transmitter to the receiver is line-sequential and the recorder (3) has a number of line memories (33), the pixel data of a field can also be called up with the aid of the processor (312) and an average density value per field can be calculated. These are then stored in the memory (311) and evaluated by means of the PC (60).
- Usual values for the number of zones in printing units are, for example, 40 zone screws per printing cylinder, which results in 10 zone screws, ie zones per plate, when 8 printing plates are installed (two in the circumferential direction). Depending on the type area, for example, 8 - 10 zones are omitted on one print page.
- the segment length can advantageously be chosen so that about 8 segments fall on one zone.
- the fields (52) of FIG. 5 can be chosen to be square or rectangular in the longitudinal direction of the zones. If you reduce the segment length, the accuracy increases. Values between 8 and 15 fields per zone are useful. In the example in FIG. 4, the mean values of the fields (52) in FIG. 5 are calculated by means of the processor (312) and the memory (311).
- the lines arriving in the recorder arrive in the line memory (33) and from there via the line (32) into the memory (311), where the entire transmitted page (50) of FIG. 5 is stored.
- the processor (312) calculates an average value per field from the stored pixels by adding up the density values of the pixels in the field. These mean density values are then stored as a coarse image, ie an image is formed from coarse lines with a coarser line grid and pixel spacing corresponding to the centers of the fields (52) in FIG. 5. This coarse image data is then transferred to the memory of the PC (60) with a page identifier .
- any customary PC can be used as the PC (60), for example an IBM PC with the MS DOS operating system Use of the Turbo C program language.
- the following steps are carried out on the PC, which any person familiar with a PC can easily carry out if these steps are known.
- a first mask corresponding to the entire type area of the page to be printed is created on the PC and placed over the stored rough lines, which defines the exact type area in the transferred page in relation to the register of the printing plate.
- the mean values are then calculated in one process
- Density values of the fields that fall in the type area are used to calculate the zone screw setting values by using a PC to place a second mask over the stored rough lines, which shows the width and relative position of the zones of the printing unit in relation to the type area.
- An average percentage density value is then calculated from the average densities of the fields of each rough line, which fall wholly or partly in the first mask, for each rough line and zone of the second mask, which takes into account the percentage of area in which the respective field lies in the zone .
- a total mean value per zone is then determined and stored for each zone from all the density values of the first calculation step falling into the zone.
- the mask (53) comprises only a part of the coarse pixels (54), i. H. the mean density values of the fields (52). Only two zones (55) and (56) are shown in FIG. 6 for simplification, and the number of fields (52) per zone is also selected to be simpler.
- the mean density values of the fields that lie entirely in the mask (53) are fully included in the calculation, the mean values of the fields covered by the mask (53) only with a percentage, that of the fields covered by the mask Area corresponds.
Landscapes
- Facsimile Image Signal Circuits (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3804941 | 1988-02-17 | ||
DE3804941A DE3804941A1 (de) | 1988-02-17 | 1988-02-17 | Verfahren und einrichtung zur erfassung von druckflaechendeckungsdaten |
PCT/DE1989/000088 WO1989007525A1 (en) | 1988-02-17 | 1989-02-16 | Process and device for measuring covering data of printing areas |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0401241A1 true EP0401241A1 (de) | 1990-12-12 |
EP0401241B1 EP0401241B1 (de) | 1994-11-09 |
Family
ID=6347589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89902230A Expired - Lifetime EP0401241B1 (de) | 1988-02-17 | 1989-02-16 | Verfahren zur erfassung von druckflächenbedeckungsdaten |
Country Status (5)
Country | Link |
---|---|
US (1) | US5128879A (de) |
EP (1) | EP0401241B1 (de) |
JP (1) | JP2572863B2 (de) |
DE (2) | DE3804941A1 (de) |
WO (1) | WO1989007525A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1557265A1 (de) * | 2004-01-20 | 2005-07-27 | MAN Roland Druckmaschinen AG | Formatanpassung für Produktionsdaten |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0764525A (ja) | 1990-02-05 | 1995-03-10 | Scitex Corp Ltd | カラー画像処理装置及びその方法 |
DE4004056A1 (de) * | 1990-02-10 | 1991-08-14 | Roland Man Druckmasch | Verfahren und vorrichtung zur farbsteuerung und zonenweisen voreinstellung |
US5335315A (en) * | 1990-09-17 | 1994-08-02 | Toppan Printing Co., Ltd. | Method for determining a graphic area ratio of a printing plate and an apparatus therefor |
EP0495563B2 (de) * | 1991-01-15 | 2004-09-29 | Creo IL.Ltd. | Rechnergesteuertes Druckgerät und Technik |
DE4142481A1 (de) * | 1991-08-12 | 1993-02-18 | Koenig & Bauer Ag | Qualitaetskontrolle einer bildvorlage z. b. eines gedruckten musters |
JP2772504B2 (ja) * | 1993-03-26 | 1998-07-02 | 大日本スクリーン製造株式会社 | 網角度が変更可能な網目版画像生成装置 |
DE4328026A1 (de) * | 1993-08-20 | 1995-03-09 | Roland Man Druckmasch | Kommunikationsverfahren und -system zum computerunterstützten Drucken |
US5992318A (en) * | 1993-10-28 | 1999-11-30 | Perretta Graphics Corporation | System for maintaining ink density |
JP3380660B2 (ja) * | 1995-10-25 | 2003-02-24 | 大日本スクリーン製造株式会社 | 画像処理装置 |
DE19632969C2 (de) | 1996-08-16 | 1999-04-29 | Roland Man Druckmasch | Verfahren zur Ermittlung von Vorgabewerten für die Herstellung von mehrfarbigen Druckexemplaren auf einer Druckmaschine |
JPH1084459A (ja) * | 1996-09-09 | 1998-03-31 | Silver Seiko Ltd | コピーシステムおよびコピー制御装置 |
KR100229504B1 (ko) * | 1997-02-05 | 1999-11-15 | 윤종용 | 인쇄매체 인식 장치 |
DE19849705A1 (de) * | 1998-10-28 | 2000-05-04 | Heidelberger Druckmasch Ag | Lagerung für Linearführungen |
US6441914B1 (en) | 1999-10-08 | 2002-08-27 | Creoscitex Corporation Ltd. | Prediction and prevention of offset printing press problems |
DE10201918B4 (de) * | 2002-01-19 | 2004-02-12 | Heidelberger Druckmaschinen Ag | Verfahren zur Bestimmung der Flächendeckung von Druckplatten |
DE102008038608A1 (de) * | 2008-08-21 | 2010-02-25 | Heidelberger Druckmaschinen Ag | Verfahren und Einrichtung zum Drucken von unterschiedlichen Nutzen auf einem Druckbogen |
DE102009021889A1 (de) | 2009-05-18 | 2010-11-25 | Heidelberger Druckmaschinen Ag | Verfahren zum Zuführen von Farbe in ein Farbwerk eines Offsetdruckwerks |
CN117257492A (zh) | 2016-11-04 | 2023-12-22 | 阿莱恩技术有限公司 | 用于牙齿图像的方法和装置 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
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DE2726828A1 (de) * | 1976-06-14 | 1977-12-29 | Grosse Webereimaschinen Gmbh | Verfahren und vorrichtung zum abtasten und lesen von farben auf patronen- oder musterpapier |
NL7802146A (nl) * | 1977-03-10 | 1978-09-12 | Xerox Corp | Reproduktie-aftastsysteem voorzien van een tussengeheugen tussen de invoer en uitvoer aftaststations. |
JPS5952069B2 (ja) * | 1977-12-15 | 1984-12-18 | 凸版印刷株式会社 | 使用インキ量予測装置 |
US4180741A (en) * | 1978-06-07 | 1979-12-25 | Harris Corporation | Apparatus for determining image areas for printing with calibration |
DE3024773A1 (de) * | 1980-06-30 | 1982-01-28 | Grapho-Metronic Meß- und Regeltechnik GmbH & Co, KG, 8000 München | Verfahren und einrichtung zur kontrolle und zum steuern der farbgebung einer mehrfarben-druckmaschine |
US4441819A (en) * | 1980-10-24 | 1984-04-10 | Dai Nippon Insatsu Kabushiki Kaisha | Calibration method for printing plate picture pattern area meter |
US4512662A (en) * | 1981-07-06 | 1985-04-23 | Tobias Philip E | Plate scanner for printing plates |
DE3214125A1 (de) * | 1981-08-27 | 1983-03-17 | Agfa-Gevaert Ag, 5090 Leverkusen | Aufzeichnungsverfahren zur tonwertrichtigen wiedergabe von insbesondere farbigen vorlagen und vorrichtung zur durchfuehrung des verfahrens |
US4573798A (en) * | 1981-09-16 | 1986-03-04 | Toshiba Kikai Kabushiki Kaisha | Method and apparatus for measuring pattern area percentage for engraving films |
JPS58187356A (ja) * | 1982-04-26 | 1983-11-01 | Fujitsu Ltd | 印刷方式 |
US4635078A (en) * | 1983-04-28 | 1987-01-06 | Canon Kabushiki Kaisha | Intermediate gradient image producing method |
JPS6024952A (ja) * | 1983-07-21 | 1985-02-07 | Mitsubishi Heavy Ind Ltd | インキ供給量設定処理装置 |
DE3334019A1 (de) * | 1983-09-21 | 1985-03-28 | Albert-Frankenthal Ag, 6710 Frankenthal | Verfahren und vorrichtung zur einstellung der den farbzonen eines farbwerks zugeordneten dosierorgane |
ATE31673T1 (de) * | 1983-11-04 | 1988-01-15 | Gretag Ag | Verfahren und vorrichtung zur beurteilung der druckqualitaet eines vorzugsweise auf einer offset-druckmaschine hergestellten druckerzeugnisses und mit einer entsprechenden vorrichtung ausgestattete offset-druckmaschine. |
JPS61102253A (ja) * | 1984-10-26 | 1986-05-20 | Dainippon Screen Mfg Co Ltd | インキ供給量データファイル作成方法及びインキ供給量データ作成方法 |
JPH0442128Y2 (de) * | 1985-04-06 | 1992-10-05 | ||
DD238577A1 (de) * | 1985-06-25 | 1986-08-27 | Polygraph Leipzig | Anpassungseinrichtung fuer ein druckmaschinen-farbwerkfernverstellsystem |
GB2178628B (en) * | 1985-07-31 | 1989-08-16 | Gerber Scient Inc | Apparatus and method for determining a colour for use in a garment design |
JPS62170346A (ja) * | 1986-01-24 | 1987-07-27 | Tokyo Kikai Seisakusho:Kk | 印刷機におけるインキ供給制御装置 |
-
1988
- 1988-02-17 DE DE3804941A patent/DE3804941A1/de not_active Withdrawn
-
1989
- 1989-02-16 WO PCT/DE1989/000088 patent/WO1989007525A1/de active IP Right Grant
- 1989-02-16 US US07/566,371 patent/US5128879A/en not_active Expired - Lifetime
- 1989-02-16 DE DE58908631T patent/DE58908631C5/de not_active Expired - Lifetime
- 1989-02-16 JP JP1502086A patent/JP2572863B2/ja not_active Expired - Lifetime
- 1989-02-16 EP EP89902230A patent/EP0401241B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO8907525A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1557265A1 (de) * | 2004-01-20 | 2005-07-27 | MAN Roland Druckmaschinen AG | Formatanpassung für Produktionsdaten |
Also Published As
Publication number | Publication date |
---|---|
DE58908631C5 (de) | 2010-06-02 |
US5128879A (en) | 1992-07-07 |
JPH03500031A (ja) | 1991-01-10 |
JP2572863B2 (ja) | 1997-01-16 |
DE58908631D1 (de) | 1994-12-15 |
WO1989007525A1 (en) | 1989-08-24 |
DE3804941A1 (de) | 1989-08-31 |
EP0401241B1 (de) | 1994-11-09 |
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