EP1155824B1 - A spray dampening apparatus - Google Patents

A spray dampening apparatus Download PDF

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Publication number
EP1155824B1
EP1155824B1 EP01111484A EP01111484A EP1155824B1 EP 1155824 B1 EP1155824 B1 EP 1155824B1 EP 01111484 A EP01111484 A EP 01111484A EP 01111484 A EP01111484 A EP 01111484A EP 1155824 B1 EP1155824 B1 EP 1155824B1
Authority
EP
European Patent Office
Prior art keywords
spray
nozzles
casing
dampening apparatus
printing press
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
EP01111484A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1155824A3 (en
EP1155824A2 (en
Inventor
Birger Hansson
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.)
Baldwin Jimek AB
Original Assignee
Baldwin Jimek AB
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 Baldwin Jimek AB filed Critical Baldwin Jimek AB
Publication of EP1155824A2 publication Critical patent/EP1155824A2/en
Publication of EP1155824A3 publication Critical patent/EP1155824A3/en
Application granted granted Critical
Publication of EP1155824B1 publication Critical patent/EP1155824B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/20—Details
    • B41F7/24—Damping devices
    • B41F7/30—Damping devices using spraying elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices

Definitions

  • the present invention relates to a device for preventing clogging of spray nozzles and/or a screening plate in a spray casing of a spray dampening apparatus arranged at a printing press roller.
  • a spray dampening apparatus is arranged in the proximity of a printing press roller for spraying fountain solution thereon.
  • This fountain solution is needed for obtaining the intended printing function in the printing press, as is well known in the art. (Other liquids than fountain solution could alternatively be sprayed.)
  • the printing ink mist causes clogging of the spray nozzles of the spray dampening apparatus, so that their intended spray function gradually deteriorates and the spray pattern of the spray dampening apparatus is changed.
  • a screening plate is provided in a spray casing in front of the spray nozzles.
  • the screening plate is provided with openings for letting through to the printing press roller only a portion of the fountain solution sprayed by the spray nozzles. These screening plate openings may be clogged by the entering printing ink mist, so that the screening function of the screening plate is changed in a non-predictable way. This is obviated by maintaining a positive pressure behind the screening plate.
  • This clogging may according to the invention be prevented in that means for emitting an air stream along spray cones from the spray nozzles towards the printing press roller are arranged at each side of the spray nozzles in the spray casing.
  • a spray dampening apparatus 1 of a generally conventional design is mounted in the vicinity of a printing press roller 2. It comprises a spray beam 3 in a longitudinal spray casing 4. Spray nozzles 5, preferably for spraying fountain solution, are arranged in the spray beam 3. They are preferably evenly distributed for obtaining an even spray pattern on the roller 2 from spray cones 6 emanating from the nozzles 5.
  • the spray casing 4 is generally closed except at its side facing the roller 2. As shown, the side walls of the spray casing 4 are curved in correspondence to the curvature of the roller 2, so that only a small circumferential gap appears between the roller 2 and the spray casing 4.
  • the environment in a printing press is comparatively harsh with for example a mist of printing ink and possibly other matters being formed in the region where the roller is situated.
  • the mist can enter into the spray casing 4 through said gap, as is illustrated by arrows 7.
  • this mist causes problems with clogging of the interior of the spray casing 4, especially the spray nozzles 5 with a gradually deteriorating operation thereof as result.
  • the arrangement comprises two longitudinal slitted air tubes 8 one at each side of the row of spray nozzles 5. These slitted tubes direct air streams 8' obliquely forwards in the spray casing 4. The purpose of these air streams 8' is to prevent the intrusion of the printing ink mist into the spray casing 4 and to create an overpressure therein.
  • a screening plate 9 provided with openings for letting through only a certain portion of the fountain solution from the spray nozzles 5 may be arranged in the spray casing 4.
  • the screening plate openings are gradually cloggged by the printing ink mist, which may be prevented by the air streams 8'.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rotary Presses (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP01111484A 2000-05-17 2001-05-11 A spray dampening apparatus Expired - Lifetime EP1155824B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0001822 2000-05-17
SE0001822A SE516747C2 (sv) 2000-05-17 2000-05-17 Sätt och anordning att hindra igensättning av spraymunstycken och/eller en avskärmningsplatta hos en sprayfuktanordning

Publications (3)

Publication Number Publication Date
EP1155824A2 EP1155824A2 (en) 2001-11-21
EP1155824A3 EP1155824A3 (en) 2003-03-05
EP1155824B1 true EP1155824B1 (en) 2007-12-12

Family

ID=20279707

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01111484A Expired - Lifetime EP1155824B1 (en) 2000-05-17 2001-05-11 A spray dampening apparatus

Country Status (4)

Country Link
EP (1) EP1155824B1 (enrdf_load_stackoverflow)
DE (1) DE60131801T2 (enrdf_load_stackoverflow)
SE (1) SE516747C2 (enrdf_load_stackoverflow)
WO (1) WO2001087603A1 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE524552C2 (sv) * 2002-05-17 2004-08-24 Baldwin Jimek Ab Metod och anordning för att hålla ett antal spraymunstycken i en tryckpress-spraybom rena
DE102006014990B4 (de) * 2006-03-31 2008-08-07 Technotrans Ag Sprühfeuchtwerk für Druckmaschinen und Verfahren zur Reinigung der wenigstens einen Düse eines Sprühfeuchtwerks
DE102007013590A1 (de) 2007-03-21 2008-09-25 Technotrans Ag Verfahren und Vorrichtung zur Reinigung von Düsen an einem Sprühfeuchtwerk
DE102018209539A1 (de) * 2018-06-14 2019-04-04 Heidelberger Druckmaschinen Ag Befeuchtungsvorrichtung in einer Druckmaschine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4241656A (en) * 1978-11-17 1980-12-30 Smith R. P. M. Corporation Self-cleaning nozzle for lithographic printing dampeners
US4569484A (en) * 1984-08-31 1986-02-11 The United States Of America As Represented By The United States Department Of Energy Air blast type coal slurry fuel injector
US5040457A (en) * 1989-10-10 1991-08-20 Rockwell International Corporation Printing press dampener
DE4125012A1 (de) * 1991-07-27 1993-01-28 Koenig & Bauer Ag Einrichtung zum befeuchten von zylindern bei offsetrotationsdruckmaschinen
JPH06198860A (ja) * 1992-12-28 1994-07-19 Sakurai Graphic Syst:Kk 印刷機のインキ洗浄装置
WO1997027052A2 (de) * 1996-01-24 1997-07-31 Koenig & Bauer-Albert Ag Sprühfeuchtwerk

Also Published As

Publication number Publication date
EP1155824A3 (en) 2003-03-05
EP1155824A2 (en) 2001-11-21
DE60131801D1 (de) 2008-01-24
SE0001822L (enrdf_load_stackoverflow) 2001-11-18
SE0001822D0 (sv) 2000-05-17
WO2001087603A1 (en) 2001-11-22
DE60131801T2 (de) 2009-01-29
SE516747C2 (sv) 2002-02-26

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