EP0186620B1 - Verfahren zum Steuern der Dicke des aus einem flüssigen Gemisch von fetten Körpern und Wasser bestehenden Films in Druckmaschinen - Google Patents

Verfahren zum Steuern der Dicke des aus einem flüssigen Gemisch von fetten Körpern und Wasser bestehenden Films in Druckmaschinen Download PDF

Info

Publication number
EP0186620B1
EP0186620B1 EP85730173A EP85730173A EP0186620B1 EP 0186620 B1 EP0186620 B1 EP 0186620B1 EP 85730173 A EP85730173 A EP 85730173A EP 85730173 A EP85730173 A EP 85730173A EP 0186620 B1 EP0186620 B1 EP 0186620B1
Authority
EP
European Patent Office
Prior art keywords
water
ink
film thickness
roller
infrared rays
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
EP85730173A
Other languages
English (en)
French (fr)
Other versions
EP0186620A2 (de
EP0186620A3 (en
Inventor
Yoshifumi Hiroshima Technical Institute Ito
Makoto Hiroshima Tech. Institute Shimoyama
Hitoshi Hiroshima Technical Institute Isono
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26456759&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0186620(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from JP59271053A external-priority patent/JPH0798396B2/ja
Priority claimed from JP60118927A external-priority patent/JPS61277455A/ja
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP0186620A2 publication Critical patent/EP0186620A2/de
Publication of EP0186620A3 publication Critical patent/EP0186620A3/en
Application granted granted Critical
Publication of EP0186620B1 publication Critical patent/EP0186620B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • 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 present invention relates to a method of automatically controlling film thickness of a mixture emulsion layer in a device, which supplies mixture emulsion of printing ink and damping water, such as an ink and dampening water feeder and a varnish coating device for use in a printer, particularly an offset printer.
  • the thickness of a layer can be determined in order to maintain a constant water-ink ratio.
  • a special sampling roller in the printing machine is provided .
  • infrared rays of different wavelength is also known from GB-A-2 016 678 and GB-A-2 127 541.
  • the first reference it is known to determine the thicknesses of several superposed layers by using one reference IR wavelength which is hardly absorbed by any of the layers and several IR wavelength which each correspond to the wavelength absorbed by one layer.
  • the film thickness of the ink is determined by the absorption characteristic of the light having the range of visible rays but the absorption characteristic is different depending on types of ink, particularly color of the ink. Accordingly, the measured value of the film thickness is widely different depending on types of the ink and it takes much time to control the film thickness. Further, the measured value is greatly influenced by outside light leaking into a measuring portion from the outside and hence it is difficult to determine the film thickness of the ink exactly.
  • a conventional varnish coating device does not control film thickness of the varnish to be constant by detecting the film thickness of the varnish being fed. Operators change a rotational number of a feeding roller properly on the basis of their own experience and judgment to adjust the film thickness. Accordingly, variation of the film thickness due to change of environmental conditions such as temperature can not be followed exactly.
  • the present invention is made in view of the above defficiencies.
  • the present invention is configured as follows.
  • the method of controlling film thickness of a mixture emulsion layer of printing ink and damping water in a printing machine is characterized in that the mixture emulsion layer of the oil or varnish and the damping water attached on one roller made of material having a surface which is difficult to absorb infrared rays, of a roller group carrying the mixture emulsion layer of the printing ink and the damping water is alternately irradiated by infrared rays of three different wavelengths in a range of 2.5 ⁇ m to 10 ⁇ m.
  • the first are strongly absorbed in the printing ink and the second are strongly absorbed in the damping water and the third are hardly absorbed in both printing ink and damping water.
  • the film thickness and percentage of water content of printing ink and damping water are calculated by calculating means from said detected signals and said calculated film thickness and water content is compared with previously determined target values for controlling the supply amount of printing ink and damping water on said one roller so that devation thereof from said target values can be reduced to a minimum.
  • the present invention possesses the following effects since the above configuration is provided.
  • the film thickness of the mixture emulsion layer of the printing ink and the water in the printing machine is detected in no contact manner irrespective of types of the printing ink and the film thickness can be automatically controlled to be a predetermined target value.
  • Supply of the printing ink or varnish and supply of the damping water to the printer can be always maintained to an optimum state and printing failure such as so-called greasing and water stain occurring due to variation of supply of the printing ink and supply of the water can be prevented, so that spoilages can be reduced.
  • a predetermined film thickness can be stably obtained at all times regardless of variation of environmental conditions such as temperature.
  • the offset printer comprises an impression cylinder 30, a blanket cylinder 31, a plate cylinder 33, an inking device including a form roller 34, inking rollers 36, an ink ductor 37, an ink fountain roller 38 and an ink fountain 39, and a damping water device including a damping water tank 41, a water fountain roller 42, a roller 43 and a form damping roller 44.
  • the metal roller 35 or 40 of the inking rollers 36 measures the film thickness of the ink and the dampening water
  • the metal roller may be replaced with other ink roller formed of material which is difficult to absorb infrared rays.
  • a sampling roller may be provided in the inking rollers 36 to measure the film thickness of the ink and the dampening water.
  • Figs. 1 and 5 The automatic control apparatus is decribed with reference to Figs. 1 and 5.
  • numeral 10 denotes an infrared emitting element, 11 a lens, 12 an interference filter, 13 a light guide pipe, 14 the mixture liquid layer of the ink and the dampening water existing on the metal roller 35, 15 a photoelectric element (a measuring device or a detector) disposed in the vicinity of the metal roller 35, 16 an amplifier, 18 a synchronizer, 19 an A/D converter, 20 a computer and 21 a plotter.
  • numerals 23 and 24 denote D/A converters, 25 a motor for driving the ink fountain roller and 26 a motor for driving the water fountain roller.
  • the infrared rays are used to detect the film thickness of the printing ink and the dampening water.
  • the material absorbs light having a particular wavelength and remaining light is accordingly observed as a color of the material.
  • the absorption of light having the particular wavelength is effected to not only a range of visible rays but also a range from ultraviolet rays to infrared rays. Since an infrared absorption spectrum in the wavelength range of 2.5 ⁇ m to 10 ⁇ m has clear correlation of the absorption characteristic and the molecular structure, it is most suitable to obtain knowledge concerning compound structure. Curves 1 and 2 of Fig.
  • the rate is related to thickness and density of a layer of a material.
  • An index representing the rate of the absorption generally uses transmittance represented by a ratio of intensity Io of incident light and intensity I of transmitted light and the transmittance is proportional to the thickness and the density of the layer.
  • Fig. 5 shows a configuration of a detection device of film thickness of the printing ink and the water for use in an embodiment of the present invention. While the detection device is a percentage meter of water content in film thickness of ink described in Japanese Patent Application No. 58-124418, since the infrared spectrum characteritic of printing ink of the embodiment and varnish of a second embodiment is almost identical, the detection device can be applied to both the embodiments.
  • the automatic control apparatus for ink and dampening water shown in Figs. 1 and 5 utilizes the above principle.
  • Infrared rays emitted from the infrared emitting element 10 forming a light source are condensed by the lens 11 and then pass through the interference filter 12.
  • the interference filter 12 is provided with three types filters of a filter for infrared rays absorbed into the ink, a filter for infrared rays absorbed into the dampening water and a filter for reference rays which are not absorbed into the ink and the dampening water.
  • the infrared rays passing through the reference filter are used to correct a measured value in absorption of the infrared rays on a basic material of the roller and to correct the measured value in accordance with variation of a measurement distance between the light guide pipe 13 and the roller 35 due to mechanical vibration.
  • the three types of filters are mounted in a chopper wheel so that infrared rays alternately illuminate the roller 35 by rotation of the chopper wheel.
  • Light passig through the interference filter illuminates emulsified ink 14 (that is, a mixture emulsion layer of ink and dampening water) on the roller 35 through the light guide pipe 13. A portion of this light is absorbed into the emulsified ink while remaining light is reflected and condensed to the photoelectric element 15.
  • the remaining light is converted to an electric signal by the photoelectric element 15 and the signal amplified by the amplifier 16 is supplied to the A/D converter 19.
  • the rotational number of the roller 35 and the rotational number of the interference filter 12 are detected and the detected signals are supplied to the A/D converter 19 through the synchronizer 18.
  • the digitized signals of the A/D converter 19 are supplied to the computer 20 together with other necessary signals to calculate the film thickness of the ink and the percentage of water content, which are supplied to the plotter 20.
  • control signals are applied from the computer 20 through the D/A converters 23 and 24 to the motor 25 for driving the ink fountain roller and the motor 26 for driving the water fountain roller to control the rotational numbers of the motors 25 and 26.
  • the varnish coating device comprises a roller group composed of a rubber blanket cylinder 137, an intermediate cylinder 138, an impression cylinder 139, a delivery shaft 140, a varnish saucer 133, a fountain roll 134, an intermediate roller 135 and a form roller 136 and a varnish feeding unit composed of a varnish tank 130, a mixture tank 131, a water tank 132 and pumps 128, 129 and 127.
  • a detection device 22 for varnish and water which is the same as the device shown in Fig.
  • Fig. 4 shows infrared absorption spectra of varnish and water in a wavelength range of 2.5 ⁇ m to 10 ⁇ m measured by an infrared spectrophotometer.
  • varnish used in a printer exhibits similar characteristic independently of types of varnish and hence measurement can be made in the absorption zones having the same wavelengths.
  • Absorption zones of water exist in three wavelengths of 2.96 ⁇ m, 4.80 ⁇ m and 6.10 ⁇ m. An actual measurement uses the wavelengths most strongly absorbed, of these absorption wavelengths, that is, the wavelength of 3.40 ⁇ m for the ink and the wavelength of 2.96 ⁇ m for the water.
  • the index representing the rate of the absorpted infrared rays into material generally uses transmittance as described above, and the transmittance is proportional to the thickness and the density of the layer.
  • the transmittance is proportional to the thickness and the density of the layer.
  • the detection device of film thickness of varnish and water used in the present embodiment uses the film thickness detection device shown in Fig. 5 in the same manner as in the first embodiment. Accordingly, operation and processing of electric signals of the detection device are the same as those of the first embodiment and description thereof is omitted.
  • numeral 14' denotes a mixture liquid layer of varnish and water.
  • the measuring roller used in the present invention is not limited to the metal roller and may be other roller having small absorption for infrared rays. Further, measuring and control can be effected if the sampling roller is mounted in the roller group.
  • the varnish and the water on The roller in the printer are detected in non-contact manner to automatically control the rotational number of the feeding roller and the ratio of the varnish and the water, and the stable film thickness of the varnish an be obtained independently of environmental conditions.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (2)

  1. Verfahren zum Steuern der Dicke eines aus einem Emulsionsgemisch aus Druckfarbe und Feuchtwasser bestehenden Films in Druckmaschinen durch Infrarot-Strahlen unterschiedlicher Wellenlänge zur Bestimmung der Dicke der Emulsionsschicht , wonach diese Information angewendet wird, um ein konstantes Wasser- Druckfarben- Verhältnis zu erhalten, dadurch gekennzeichnet , daß
    (a) das Emulsionsgemisch aus Druckfarbe und Feuchtwasser der Druckmaschine durch eine Anordnung von Druckfarbwalzen (36, 134, 135) zugeführt wird, wobei eine übliche Walze (35, 136) (keine Probewalze) der Anordnung der Druckfarbwalzen (36, 134, 135) eine Oberfläche aufweist, die in der Lage ist, fast alle Infrarot-Strahlen einer Wellenlänge im Bereich 2,5 µm bis 10 µm zu reflektieren,
    (b) die Oberfläche mit Infrarot-Strahlen dreier unterschiedlicher Wellenlängen in einem Bereich von 2,5 µm bis 10 µm bestrahlt wird,
    (c) die ersten Infrarot-Strahlen eine Wellenlänge aufweisen, die stark von der Druckfarbe absorbiert wird,
    (d) die zweiten Infrarot-Strahlen eine Wellenlänge aufweisen, die stark vom Feuchtwasser absorbiert wird,
    (e) die dritten Infrarot-Strahlen eine Wellenlänge aufweisen, die gleichsam von beiden, Druckfarbe und Feuchtwasser, absorbiert wird,
    (f) die Menge des reflektierten Lichts der ersten, zweiten und dritten Infrarot-Strahlen jeweils von der einen Walze (35, 136) erfaßt wird,
    (g) die Filmdicke und der Anteil des Wassergehalts der Druckfarbe und des Feuchtwassers durch einen Rechner aus den erfaßten Signalen berechnet wird und die brechnete Filmdicke und der Wassergehalt mit vorher bestimmten Sollwerten zur Steuerung der Zuführmenge an Druckfarbe und Feuchtwasser zu der einen Walze verglichen werden , so daß eine Abweichung von den Sollwerten auf ein Minimum reduziert werden kann.
  2. Verfahren zur Steuerung der Filmdicke nach Anspruch 1, dadurch gekennzeichnet, daß die Druckfarbe Firnis ist.
EP85730173A 1984-12-24 1985-12-23 Verfahren zum Steuern der Dicke des aus einem flüssigen Gemisch von fetten Körpern und Wasser bestehenden Films in Druckmaschinen Expired - Lifetime EP0186620B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP59271053A JPH0798396B2 (ja) 1984-12-24 1984-12-24 オフセット印刷機におけるインキと湿し水との量的バランスの自動制御方法
JP271053/84 1984-12-24
JP60118927A JPS61277455A (ja) 1985-06-03 1985-06-03 印刷機におけるニスコ−ト膜厚の自動制御システム
JP118927/85 1985-06-03

Publications (3)

Publication Number Publication Date
EP0186620A2 EP0186620A2 (de) 1986-07-02
EP0186620A3 EP0186620A3 (en) 1988-06-08
EP0186620B1 true EP0186620B1 (de) 1992-04-15

Family

ID=26456759

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85730173A Expired - Lifetime EP0186620B1 (de) 1984-12-24 1985-12-23 Verfahren zum Steuern der Dicke des aus einem flüssigen Gemisch von fetten Körpern und Wasser bestehenden Films in Druckmaschinen

Country Status (2)

Country Link
EP (1) EP0186620B1 (de)
DE (1) DE3585875D1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19536318B4 (de) * 1995-09-29 2004-05-06 Pts Jena Gmbh Vorrichtung zur gewichtsabhängigen Gebührenberechnung für Abfallsammelbehälter

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3611645A1 (de) * 1986-04-07 1987-10-08 Grapho Metronic Gmbh & Co Verfahren und vorrichtung zur regelung der farb- und feuchtmittelanteile einer emulsionsschicht auf der druckplatte einer offset-druckmaschine
DE4033521C2 (de) * 1990-10-22 1994-12-01 Jagenberg Ag Vorrichtung zum beidseitigen Beschichten einer Materialbahn
DE4126888A1 (de) * 1991-08-14 1993-02-18 Baldwin Gegenheimer Gmbh Bahnreinigungsanlage zur reinigung einer zu bedruckenden bahn
DE4218764A1 (de) * 1992-06-06 1993-12-09 Heidelberger Druckmasch Ag Verfahren zur Positionierung eines Registermarkensensors an einer Bogendruckmaschine
DE4244500A1 (de) * 1992-12-30 1994-07-07 Heidelberger Druckmasch Ag Verfahren zum Zuführen von Feuchtmittel
JP2004074723A (ja) * 2002-08-22 2004-03-11 Fuji Photo Film Co Ltd 平版印刷方法および印刷装置
JP6710132B2 (ja) * 2016-09-26 2020-06-17 株式会社小森コーポレーション 印刷物のニス膜厚測定方法及びニス膜厚測定装置
CN108303241B (zh) * 2017-12-28 2019-09-27 西安理工大学 一种模块化油膜阻尼测试装置与方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
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
DE2736663C3 (de) * 1977-08-13 1985-05-15 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Vorrichtung zur Ermittlung des Feucht- und Farbgleichgewichts bei Offsetdruckwerken
US4149802A (en) * 1978-01-09 1979-04-17 Roland Offsetmaschinenfabrik Faber & Schleicher Ag Device for measuring ink film thickness
GB2016678B (en) * 1978-03-10 1982-09-15 Asahi Dow Ltd Infrared multilayer film thickness measuring method and apparatus
US4306152A (en) * 1979-07-23 1981-12-15 Anarad, Inc. Optical fluid analyzer
GB2127541B (en) * 1982-09-27 1986-08-20 Imp Group Plc Monitoring sheet material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19536318B4 (de) * 1995-09-29 2004-05-06 Pts Jena Gmbh Vorrichtung zur gewichtsabhängigen Gebührenberechnung für Abfallsammelbehälter

Also Published As

Publication number Publication date
DE3585875D1 (de) 1992-05-21
EP0186620A2 (de) 1986-07-02
EP0186620A3 (en) 1988-06-08

Similar Documents

Publication Publication Date Title
US4677298A (en) Method of monitoring ink-water balance on a lithographic printing press
US6065400A (en) Method for monitoring registration of images printed by a printer
EP0186620B1 (de) Verfahren zum Steuern der Dicke des aus einem flüssigen Gemisch von fetten Körpern und Wasser bestehenden Films in Druckmaschinen
US5397192A (en) Shuttle-type printers and methods for operating same
US6832550B2 (en) Ink and dampening solution determination in offset printing
US3185088A (en) Method and apparatus for predetermining settings for ink fountain keys
US4306151A (en) Method of measuring the amount of substance associated with a material in the presence of a contaminant
US7894065B2 (en) Ink splitting correction method
US4752892A (en) Measuring elements of closed circuit systems for controlling-correcting the print in offset printing machines
JPH0360312B2 (de)
US7000544B2 (en) Measurement and regulation of inking in web printing
US4681455A (en) Method of determining the area coverage of a printed original or printing plate for printing presses
US4151796A (en) Device for automatically controlling deviations in liquid feed in offset presses
US3960451A (en) Dampening system on an offset printing press with a device for regulating the amount of water on the plate
FI115205B (fi) Menetelmä ja laite painojäljen on-line valvomiseksi
KR860000598B1 (ko) 옵세트 인쇄기의 잉크공급장치내에서 습분 안내의 구역별의 측정기술에 의한 조절을 위한 장치
US5713286A (en) Method for regulating dampening agent
US6194215B1 (en) Method and device for the continuous measurement and control of the composition of a wetting-agent solution for offset printing
JPS61148061A (ja) オフセツト印刷機におけるインキと湿し水の自動制御方法
GB2254917A (en) Determining the amount of a fluid or the thickness of a fluid film
US7444935B2 (en) Method for correction of variations in the amount of ink applied in a printing process
CA1129715A (en) Sensing device for ink film thickness in printing presses
JP4638685B2 (ja) オフセット印刷機による印刷の際に湿し水を調量する方法
EP0864931A1 (de) Reflektometer und Verfahren zur Überwachung der Dichte von bedrucktem Material
GB2235901A (en) Print control strip examination device

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT SE

17P Request for examination filed

Effective date: 19860702

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT SE

17Q First examination report despatched

Effective date: 19900209

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT SE

ET Fr: translation filed
REF Corresponds to:

Ref document number: 3585875

Country of ref document: DE

Date of ref document: 19920521

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: MAN ROLAND DRUCKMASCHINEN AG

Effective date: 19921221

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19931209

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19931214

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19931215

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19931227

Year of fee payment: 9

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

27W Patent revoked

Effective date: 19940529

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state

Free format text: 940529

EUG Se: european patent has lapsed

Ref document number: 85730173.3

Effective date: 19941012