EP0132624A1 - Dispositif de contrôle par zones de l'alimentation en agent de mouillage dans l'encrier d'une machine à imprimer offset, au moyen de techniques de mesure - Google Patents
Dispositif de contrôle par zones de l'alimentation en agent de mouillage dans l'encrier d'une machine à imprimer offset, au moyen de techniques de mesure Download PDFInfo
- Publication number
- EP0132624A1 EP0132624A1 EP84107564A EP84107564A EP0132624A1 EP 0132624 A1 EP0132624 A1 EP 0132624A1 EP 84107564 A EP84107564 A EP 84107564A EP 84107564 A EP84107564 A EP 84107564A EP 0132624 A1 EP0132624 A1 EP 0132624A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- area coverage
- measuring roller
- measuring
- oleophilic
- grid
- 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
- 238000007645 offset printing Methods 0.000 title claims abstract description 6
- 238000000034 method Methods 0.000 title abstract description 6
- 230000005660 hydrophilic surface Effects 0.000 claims abstract description 7
- 230000005693 optoelectronics Effects 0.000 claims abstract description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 230000001419 dependent effect Effects 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000000284 resting effect Effects 0.000 claims description 2
- 238000007639 printing Methods 0.000 description 15
- 239000000839 emulsion Substances 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
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
- B41F33/10—Tripping devices or stop-motions for starting or stopping operation of damping or inking units
-
- 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 device for zone-wise metrological control of the dampening solution guide in the inking unit of an offset printing press with a measuring roller resting on an inking roller with partly oleophilic, partly hydrophilic surface areas and an opto-electronic measuring device assigned to the measuring roller and working without contact over its entire width.
- the fact that the color requirement of a print image over the printing form width depends on the respective area coverage is taken into account by zonal control or regulation of the ink supply.
- the dampening solution on the other hand, is fed to the printing plate over its entire width in the form of a film that is as thin and uniform as possible. In an equivalent way to ink consumption, however, more dampening solution may also be required at certain local plate areas than at other locations on the printing plate. This locally increased ink requirement is attempted to be remedied by a dampening solution supply averaged over all image areas, on the assumption that a ink / dampening emulsion forms in the inking unit, which produces the necessary compensation.
- the invention takes advantage of the knowledge that both chrome and aluminum rollers as connection rollers between the inking and dampening units run bright, i.e. preferably absorb dampening solution and repel ink when moistened.
- the object of the invention is to create a simple control device with little manufacturing effort, with which the fluctuations in the dampening solution content of the printing ink resulting from partially different evaporation of the dampening solution and different ink consumption can be used uniformly over the entire machine width for subsequent use to influence the dampening solution supply in zones get measured precisely.
- the oleophilic surface areas are designed as a grid, the surface coverage of the grid with ink being strongly dependent on the dampening solution content thereof.
- the dampening solution guidance can be checked very effectively zone by zone in order to achieve perfect print quality, even within a narrow tolerance range, since the area covered by the oleophilic grid with ink is highly dependent on its dampening solution content and thus indirectly represents a measure of the dampening solution guidance.
- Even the smallest changes in area coverage reliably indicate changes in the ink-fountain solution balance and thus an excess or insufficient amount of fountain solution, the uniformity of the measurement results of all ink zones across the entire width of the machine being particularly advantageous.
- the sensitivity of the measuring device can be optimized by empirical selection of different degrees of area coverage of the oleophilic grid, and thereby an accurate statement about the dampening solution supply can be achieved.
- a preferred embodiment of the invention is that the oleophilic screen has uniform area coverage of any area coverage both in the longitudinal and in the circumferential direction of the measuring roller.
- the oleophilic grid is designed as a grid wedge that runs continuously in the circumferential direction of the measuring roller and has a continuously decreasing area coverage from 100% to 0%. This benefits a higher measuring sensitivity of the measuring roller and thus a better differentiation of the area coverage, which is also reflected in a continuously and more accurate display of the measurement result.
- a measuring roller 3 is employed on an inking roller 1 of a plate cylinder (not shown). For reasons of space, the measuring roller 3 is preferably positioned on the last inking roller 1.
- the surface of the measuring roller 3 consists of a material with hydrophilic properties, preferably aluminum or chromium.
- an oleophilic grid 4 preferably made of copper or plate layer (light-sensitive layer), is produced on the surface of the measuring roller 3.
- the geometry of the oleophilic grid 4 can be point-shaped or square-shaped and can have different surface coverings, the cheapest surface cover in each case being determined empirically.
- an opto-electronic measuring device 6 of known type is provided, which is equipped with at least one sensor 7 which can be displaced laterally in the longitudinal direction of the measuring roller 3 with the radiation source 8 associated therewith (FIG. 2).
- the measuring device 6 is coupled to a display device 9 which can optionally be switched to different zones.
- the measuring device 6 is preferably equipped with a large number of sensors 7, with each zone to be measured being assigned its own sensor 7.
- the display device 9 extends over the entire machine width and allows a coherent display of all measured values of the area coverage at the same time.
- the type and function of such opto-electronic measuring devices 6 are from the prior art, e.g. from DE-AS 27 36 663, known and therefore need not be shown in more detail and described in more detail.
- the oleophilic grid 4 has a uniform area coverage with an arbitrarily selectable area coverage in the longitudinal direction of the measuring roller 3, but is provided in the circumferential direction of the measuring roller 3 with an uneven area coverage with different area coverage levels.
- the uneven area coverage can be graduated, for example with degrees of area coverage of 20, 30, 40, 50% etc. or be designed as a stepless raster wedge 10 with a continuously decreasing or increasing area coverage from 100% to 0%.
- the oleophilic grid 4 the copper surface, takes on the printing ink and is thus colored, while the remaining hydrophilic surface areas 5, the aluminum or chrome surfaces, do not take on any color.
- the area coverage of the oleophilic grid by the amount of ink transferred to it is strongly dependent on the dampening solution management, i.e. depending on the dampening solution content of the ink. E.g. If the dampening solution is set too high, the oleophilic grid 4 will also take on less color. The reverse is true if the dampening solution supply is too low.
- the area coverage or its change is now continuously measured on the oleophilic grid 4, preferably in all zones simultaneously.
- the measured values are converted into display signals in process steps known per se and therefore not described, amplified and then displayed in the display device 9 in analog or digital form. Instead, it is also possible to use the measured values directly as control commands for direct control of zonal actuators in a dampening unit.
- the change in area coverage on the measuring roller 3 thus represents a reliable measure of the print quality.
- the above-mentioned, uniformly graded surface coverage of the oleophilic grid 4 in the circumferential direction of the measuring roller 3 of the embodiment according to FIG. 3 enables - according to the selected gradation - the metrological detection of the moisture change in finely divided step steps. It has proven to be particularly advantageous in terms of better differentiation of the area coverage to provide the measuring roller 3 with the stepless raster wedge 10. This type of screening is particularly sensitive and very quick to respond to even minor changes in area coverage.
- the sensor signal is shown on the ordinate as a function of the area coverage of the measuring roller 3 plotted on the abscissa.
- the measuring roller 3 only accepts ink from the inking roller 1 and is completely inked, so that the sensor (s) 7 determine 100% area coverage .
- the associated sensor signal of full tone reflection is characterized by reference number 11.
- the dampening unit After printing, when the dampening unit has started its work, an ink / dampening solution emulsion forms in the inking unit, whereby the measuring roller 3 accepts both ink and dampening solution. This changes their area coverage and to the same extent the sensor signal.
- the tolerance range 13 of the dampening solution guide is defined by its upper and lower limits 14 and 15.
- the mean value of the dampening solution guidance when the ink on the measuring roller 3 and the dampening solution keep the balance, is shown in dashed lines and marked with the reference number 16.
- the extreme case opposite the full tone reflection occurs when, for example, the measuring roller 3 runs bare without ink due to excessive dampening solution guidance (point 12). In this case, the measuring radiation emitted by the radiation source 8 is totally reflected on the hydrophilic surface areas 5.
- the level of the sensor signal 12 of this total reflection corresponds to an area coverage of the measuring roller 3 of 0%.
Landscapes
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Rotary Presses (AREA)
- Spectrometry And Color Measurement (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT84107564T ATE32045T1 (de) | 1983-07-23 | 1984-06-29 | Vorrichtung zur zonenweisen messtechnischen kontrolle der feuchtmittelfuehrung im farbwerk einer offsetdruckmaschine. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3326698 | 1983-07-23 | ||
DE19833326698 DE3326698A1 (de) | 1983-07-23 | 1983-07-23 | Vorrichtung zur zonenweisen messtechnischen kontrolle der feuchtmittelfuehrung im druckwerk einer offsetdruckmaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0132624A1 true EP0132624A1 (fr) | 1985-02-13 |
EP0132624B1 EP0132624B1 (fr) | 1988-01-20 |
Family
ID=6204814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84107564A Expired EP0132624B1 (fr) | 1983-07-23 | 1984-06-29 | Dispositif de contrôle par zones de l'alimentation en agent de mouillage dans l'encrier d'une machine à imprimer offset, au moyen de techniques de mesure |
Country Status (11)
Country | Link |
---|---|
US (1) | US4722274A (fr) |
EP (1) | EP0132624B1 (fr) |
JP (1) | JPS6054849A (fr) |
KR (1) | KR860000598B1 (fr) |
AT (1) | ATE32045T1 (fr) |
CA (1) | CA1221852A (fr) |
DE (2) | DE3326698A1 (fr) |
DK (1) | DK286684A (fr) |
ES (1) | ES8502911A1 (fr) |
NO (1) | NO842971L (fr) |
ZA (1) | ZA844732B (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5694846A (en) * | 1991-06-06 | 1997-12-09 | Baldwin Graphics Systems, Inc. | Fountain solution supply system |
US5713282A (en) * | 1991-06-06 | 1998-02-03 | Baldwin Technology Corporation | Fountain solution supply system |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4864925A (en) * | 1987-09-28 | 1989-09-12 | Rockwell International Corporation | Simplified lithography using ink and water admixtures |
US5018445A (en) * | 1988-04-19 | 1991-05-28 | Six Albert J | Magnetically delivered ink |
DE8904197U1 (de) * | 1989-04-05 | 1989-05-18 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | Walze im Druckwerk von Rotationsdruckmaschinen |
US5360399A (en) * | 1992-01-10 | 1994-11-01 | Robert Stegmann | Method and apparatus for maintaining the normal intraocular pressure |
DE4214139C2 (de) * | 1992-04-29 | 2002-01-10 | Heidelberger Druckmasch Ag | Verfahren zur Feuchtmittelregulierung beim Drucken von einem Formzylinder in einer Offsetdruckmaschine |
DE4244500A1 (de) * | 1992-12-30 | 1994-07-07 | Heidelberger Druckmasch Ag | Verfahren zum Zuführen von Feuchtmittel |
DE4303282C2 (de) * | 1993-02-05 | 2002-02-28 | Heidelberger Druckmasch Ag | Vorrichtung zur Feuchtmittelzufuhr bei einer Offsetdruckmaschine |
DE9305742U1 (de) * | 1993-04-16 | 1993-06-17 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | Feuchtwerk für Offsetdruckmaschinen |
US5592880A (en) * | 1993-12-30 | 1997-01-14 | Heidelberger Druckmaschinen | Method of supplying or feeding dampening solution |
US5791249A (en) * | 1997-03-27 | 1998-08-11 | Quad/Tech, Inc. | System and method for regulating dampening fluid in a printing press |
US5826507A (en) * | 1997-05-22 | 1998-10-27 | Union Camp Corporation | Method for measuring the amount of fountain solution in offset lithography printing |
DE10316240A1 (de) * | 2003-04-09 | 2004-11-04 | Maschinenfabrik Wifag | Walze für eine Druckmaschine und Verfahren zur Herstellung einer Walze |
CN111929319B (zh) * | 2020-10-14 | 2021-04-09 | 天津文洲机械有限公司 | 一种间接式高精度丝网破损视觉检测机 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2214721B1 (de) * | 1972-03-25 | 1973-06-14 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | Verfahren und vorrichtung zum selbsttaetigen ausregeln von schwankungen der farb- und feuchtfluessigkeitsfuehrung an offsetmaschinen |
EP0000689A1 (fr) * | 1977-08-13 | 1979-02-21 | Heidelberger Druckmaschinen Aktiengesellschaft | Procédé et dispositif pour contrôler l'équilibre entre le liquide de mouillage et l'encre dans des dispositifs à imprimer en offset |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1303819C2 (de) * | 1964-05-29 | 1973-07-12 | Vorrichtung zum messen einer schichtdicke auf oberflaechen | |
US3756725A (en) * | 1970-10-12 | 1973-09-04 | Harris Intertype Corp | Measurement and control of ink density |
DD157779A1 (de) * | 1980-10-06 | 1982-12-08 | Hans Johne | Verfahren und vorrichtung zur optimalen zumessung des feuchtmittels |
DE3220282C3 (de) * | 1982-05-28 | 1995-05-18 | Roland Man Druckmasch | Vorrichtung zum betrieblichen Erfassen eines Maßes für die Feuchtmittelmenge auf der rotierenden Druckplatte in Offset-Druckmaschinen |
-
1983
- 1983-07-23 DE DE19833326698 patent/DE3326698A1/de not_active Ceased
-
1984
- 1984-06-04 KR KR1019840003100A patent/KR860000598B1/ko not_active IP Right Cessation
- 1984-06-07 CA CA000456050A patent/CA1221852A/fr not_active Expired
- 1984-06-12 DK DK286684A patent/DK286684A/da not_active Application Discontinuation
- 1984-06-19 ES ES533544A patent/ES8502911A1/es not_active Expired
- 1984-06-21 ZA ZA844732A patent/ZA844732B/xx unknown
- 1984-06-29 EP EP84107564A patent/EP0132624B1/fr not_active Expired
- 1984-06-29 AT AT84107564T patent/ATE32045T1/de not_active IP Right Cessation
- 1984-06-29 DE DE8484107564T patent/DE3468837D1/de not_active Expired
- 1984-07-20 NO NO842971A patent/NO842971L/no unknown
- 1984-07-23 JP JP59151451A patent/JPS6054849A/ja active Granted
-
1986
- 1986-02-14 US US06/830,063 patent/US4722274A/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2214721B1 (de) * | 1972-03-25 | 1973-06-14 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | Verfahren und vorrichtung zum selbsttaetigen ausregeln von schwankungen der farb- und feuchtfluessigkeitsfuehrung an offsetmaschinen |
EP0000689A1 (fr) * | 1977-08-13 | 1979-02-21 | Heidelberger Druckmaschinen Aktiengesellschaft | Procédé et dispositif pour contrôler l'équilibre entre le liquide de mouillage et l'encre dans des dispositifs à imprimer en offset |
Non-Patent Citations (1)
Title |
---|
PATENTS ABSTRACTS OF JAPAN, Band 7, Nr. 124 (M-218)[1269], 28. Mai 1983; & JP - A - 56 118 969 (TOUKIYOU KIKAI SEISAKUSHO K.K.) 11-03-1983 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5694846A (en) * | 1991-06-06 | 1997-12-09 | Baldwin Graphics Systems, Inc. | Fountain solution supply system |
US5713282A (en) * | 1991-06-06 | 1998-02-03 | Baldwin Technology Corporation | Fountain solution supply system |
EP0517462B1 (fr) * | 1991-06-06 | 1999-01-20 | BALDWIN GRAPHIC SYSTEMS, Inc. | Système d'alimentation de liquide de mouillage |
Also Published As
Publication number | Publication date |
---|---|
US4722274A (en) | 1988-02-02 |
DE3468837D1 (en) | 1988-02-25 |
NO842971L (no) | 1985-01-24 |
KR860000598B1 (ko) | 1986-05-22 |
ATE32045T1 (de) | 1988-02-15 |
JPS6054849A (ja) | 1985-03-29 |
EP0132624B1 (fr) | 1988-01-20 |
DE3326698A1 (de) | 1985-02-07 |
ES533544A0 (es) | 1985-02-16 |
DK286684A (da) | 1985-01-24 |
DK286684D0 (da) | 1984-06-12 |
CA1221852A (fr) | 1987-05-19 |
ZA844732B (en) | 1985-02-27 |
JPH0339459B2 (fr) | 1991-06-13 |
ES8502911A1 (es) | 1985-02-16 |
KR850001087A (ko) | 1985-03-14 |
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