EP1097812B1 - Vorrichtung und Verfahren zum Befeuchten eines Bauteils in einer Druckmaschine - Google Patents

Vorrichtung und Verfahren zum Befeuchten eines Bauteils in einer Druckmaschine Download PDF

Info

Publication number: EP1097812B1
Authority: EP; European Patent Office
Prior art keywords: dampening solution; jet; dampening; pressure; printing machine
Prior art date: 1999-11-03
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

EP00121915A

Other languages

German (de)

English (en)

French (fr)

Other versions

EP1097812A3 (de

EP1097812A2 (de

Inventor

Raymond Hildreth Spooner

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.)

Goss International Americas LLC

Original Assignee

Goss International Americas LLC

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.)

1999-11-03

Filing date

2000-10-07

Publication date

2006-11-29

2000-10-07 Application filed by Goss International Americas LLC filed Critical Goss International Americas LLC

2001-05-09 Publication of EP1097812A2 publication Critical patent/EP1097812A2/de

2002-05-22 Publication of EP1097812A3 publication Critical patent/EP1097812A3/de

2006-11-29 Application granted granted Critical

2006-11-29 Publication of EP1097812B1 publication Critical patent/EP1097812B1/de

2020-10-07 Anticipated expiration legal-status Critical

Status 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

Definitions

the present invention relates to a method for moistening a component in a printing machine, in particular a plate cylinder, according to claim 1.
the present invention relates to a printing machine according to claim 9.
dampening units are used to moisten the rollers and cylinders, by means of which a dyed image is transferred to a substrate web or sheet.
a fountain solution eg. As water or mixed with water other liquid transferred to one or more rollers or cylinders.
dampening solution there are two types of transfer of dampening solution to the rollers or cylinders of a printing press, of which at least one application is usually found:
the fountain solution can be sprayed either in the form of tiny drops directly on one of the rollers or one of the cylinders of the printing press, or the dampening solution is transferred to one of the rollers or one of the cylinders via a dampening train.
a dampening train consists of a series of juxtaposed rollers which transfer the dampening solution respectively to the subsequent roller and finally to the desired printing cylinder.
the dampening solution is sprayed either in the form of tiny drops on one of the rollers of the dampening train or taken up by a partially immersed in dampening solution, rotating in the fountain solution tank roller. Dampening rollers are often expensive and maintenance-intensive due to the number of rollers required to disperse and transfer the dampening solution.
the invention provides a method and a printing machine, by means of which or which the fountain solution, preferably in the form of substantially continuous dampening high-density radiation onto a component, eg. As a roller or a cylinder is transmitted.
the term "continuous jet” refers to a uniform, preferably vortex-free liquid jet which produces a minimum number of individual drops of fountain solution.
the fountain solution is not or only minimally in the form of drops.
the high-density continuous jets of the invention impinge on the roller or cylinder and the fountain solution spreads on the surface of the roller or cylinder by spreading radially on the surface of the roller or cylinder from the application point of the jet and forms puddles, so to speak.
Each of the continuous jets is produced by a jet orifice, preferably a nozzle or micro nozzle, through which the dampening solution exits at a suitable pressure of the dampening solution in the form of a continuous, relatively uniform, preferably laminar jet.
a pressure distributor is preferably provided, along which a number of spaced jet diaphragms are preferably arranged in such a way that a series of continuous jets is produced along the length of the roller to be moistened.
the jet apertures are preferably designed as micro-nozzles, and the pressure of the fountain solution is preferably adjustable via control valves.
the uniform jets emerging from the jet apertures which are distributed in the form of fountain solution puddles on the roll surface, allow a uniform distribution of dampening solution over the entire length of the roll or cylinder surface.
the present invention increases the print quality by avoiding fluctuations in print quality caused by variations in the amount of fountain solution along the roll surface.
Figs. 1 to 3 show a pressure distributor 1 according to an embodiment of the present invention.
the pressure distributor 1 according to the invention comprises a dampening solution inlet line 5, preferably running along the length of the pressure distributor 1, which is preferably connected to a container D containing pressurized dampening solution.
a bolt 7 may be provided to close one end of the inlet pipe 5.
the pressure distributor 1 is supplied with pressurized dampening solution with which a roller or a cylinder is to be moistened in a printing press.
a series of outlet lines 9 extend through a wall of the pressure distributor 1.
the outlet lines 9 connect the interior of the inlet line 5 to one of a series of control valves 6 arranged on the pressure distributor 1.
the outlet lines 9 accordingly supply pressurized dampening solution to the control valves 6.
the control valves 6 may be formed as any valve capable of controlling a flow of liquid.
the control valves 6 are controlled by any known control unit 10, for example a pneumatic or hydraulic control console, an electronic microprocessor or other electronic control unit.
the control unit 10 sends via lines 11 signals to each one of the control valves 6 and controls in this way the opening and closing and the degree of opening or closing of the control valves 6.
the control valves 6 control the Feuchtffenzul from the inlet line 5 to further inlet openings 8, each leading to a pressure chamber 4 a plurality of arranged along the length of the pressure manifold 1 pressure chambers 4.
the control valves 6 accordingly regulate the pressure in each of the pressure chambers 4.
Each of the pressure chambers 4 directs fountain solution to a group of spaced across the width of the pressure distributor 1 arranged jet aperture 3.
the jet aperture 3 are arranged at a distance d to each other and each produce a continuous dampening solution Beam 9 emerging from the beam apertures 3 and impinging on a roller or a cylinder, for example a plate cylinder P.
the jet apertures 3 are preferably designed as micro-nozzles, ie as nozzles with a very small opening. They can be incorporated directly into one side of the pressure distributor 1, z. B. drilled, be or form a separately prepared component which is inserted into an opening formed in the side of the pressure distributor 1. As will be explained in more detail below, the size of the beam aperture 3 is selected such that the beam aperture in a pressure of the fountain solution, as it is generated in the pressure chambers 4 by the control valves 6, a continuous dampening jet 8 of high density and in particular produce a consisting of a substantially laminar flow beam.
the pressure in the pressure chambers 4 can be controlled to move within a suitable range in which a substantially laminar flow from the jet apertures 3 exit, all of a given size.
the pressure in the pressure chambers 4 is regulated via the control valves 6, which in turn are controlled by the control unit 10.
a pressure gauge (not shown) in the pressure chambers 4 may be used to ensure that the pressure in the pressure chambers 4 moves within the appropriate range, so that continuous Rays out of the beam aperture 3 of predetermined size.
the pressure in the pressure chambers 4 can be regulated by the control unit, so that the flow rate can be changed.
the flow rate can be varied in this way and adapted to different conditions when more or less dampening solution is needed on a roller or a cylinder in the printing press.
the pressure distributor 1 according to the invention is shown in a position in which the rotating in the direction R plate cylinder P is moistened, which transmits in an offset printing press on a blanket cylinder B color.
the pressure distributor 1 is oriented so as to transfer dampening means in the form of continuous high-density jets to the surface of the plate cylinder P.
the flow rate and the speed of the beams emerging from the jet aperture 3 can be varied in such a way that different beam profiles S 1 (low flow rate), S 2 (average flow rate) or S 3 (high Flow rate) are generated.
the flow capacity of the jet aperture 3 is regulated by the control valves 6 for each pressure chamber 4.
the different flow rates control the Degree of moistening of the surface of the plate cylinder P.
the degree of moistening of the plate cylinder P can be regulated while at the same time ensuring that the pressure distributor 1 and the jet diaphragms 3 generate continuous jets.
the jet apertures 3 are arranged at a distance from one another in such a way that the continuous rays S produced by them effect a uniform distribution of the fountain solution on the surface of the roll to be moistened or of the cylinder to be moistened.
Fig. 5 it is shown how the dampening solution is applied to the surface of the plate cylinder P.
the continuous rays S which are shown in cross section at their point of impact on the plate cylinder P, are distributed in the form of puddles, which propagate in the directions indicated by the arrows.
the dampening solution of one jet S flows together with the dampening solution of the adjacent continuous jet S in a cutting region I.
the distance d is chosen in such a way that the distributing fountain solution flows together with the different possible flow rates of the jet aperture 3 with the distributing dampening solution of the adjacent jet S without gaps.
the impingement point of the continuous jet S in the downstream direction region of the fountain solution forms a moistening layer L, which extends over the entire length of the plate cylinder P and in this way the plate cylinder evenly moistened.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Rotary Presses (AREA)
Inking, Control Or Cleaning Of Printing Machines (AREA)
Manufacture Or Reproduction Of Printing Formes (AREA)
Printing Methods (AREA)

EP00121915A 1999-11-03 2000-10-07 Vorrichtung und Verfahren zum Befeuchten eines Bauteils in einer Druckmaschine Expired - Lifetime EP1097812B1 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US433160		1999-11-03
US09/433,160 US6561090B1 (en)	1999-11-03	1999-11-03	Printing press dampener using straight streams and method of dampening a printing press

Publications (3)

Publication Number	Publication Date
EP1097812A2 EP1097812A2 (de)	2001-05-09
EP1097812A3 EP1097812A3 (de)	2002-05-22
EP1097812B1 true EP1097812B1 (de)	2006-11-29

Family

ID=23719065

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP00121915A Expired - Lifetime EP1097812B1 (de)	1999-11-03	2000-10-07	Vorrichtung und Verfahren zum Befeuchten eines Bauteils in einer Druckmaschine

Country Status (5)

Country	Link
US (1)	US6561090B1 (ja)
EP (1)	EP1097812B1 (ja)
JP (1)	JP4755332B2 (ja)
AT (1)	ATE346747T1 (ja)
DE (2)	DE50013808D1 (ja)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE10242995B4 (de) *	2002-09-17	2006-09-07	Koenig & Bauer Ag	Feuchtwerk für eine Druckmaschine
DE10317470B4 (de) *	2003-04-16	2005-10-06	Technotrans Ag	Sprühfeuchtwerk
US20120274914A1 (en)	2011-04-27	2012-11-01	Palo Alto Research Center Incorporated	Variable Data Lithography System for Applying Multi-Component Images and Systems Therefor
US8991310B2 (en)	2011-04-27	2015-03-31	Palo Alto Research Center Incorporated	System for direct application of dampening fluid for a variable data lithographic apparatus
US9021948B2 (en)	2011-04-27	2015-05-05	Xerox Corporation	Environmental control subsystem for a variable data lithographic apparatus
US8347787B1 (en)	2011-08-05	2013-01-08	Palo Alto Research Center Incorporated	Variable data lithography apparatus employing a thermal printhead subsystem
US20130033686A1 (en)	2011-08-05	2013-02-07	Palo Alto Research Center Incorporated	Direct Application of Dampening Fluid for a Variable Data Lithographic Apparatus
US20130033687A1 (en)	2011-08-05	2013-02-07	Palo Alto Research Center Incorporated	Method for Direct Application of Dampening Fluid for a Variable Data Lithographic Apparatus
US9021949B2 (en)	2012-02-06	2015-05-05	Palo Alto Research Center Incorporated	Dampening fluid recovery in a variable data lithography system
US8950322B2 (en)	2012-03-21	2015-02-10	Xerox Corporation	Evaporative systems and methods for dampening fluid control in a digital lithographic system
US9032874B2 (en)	2012-03-21	2015-05-19	Xerox Corporation	Dampening fluid deposition by condensation in a digital lithographic system
US9316994B2 (en)	2012-07-12	2016-04-19	Xerox Corporation	Imaging system with electrophotographic patterning of an image definition material and methods therefor
US8833254B2 (en)	2012-07-12	2014-09-16	Xerox Corporation	Imaging system with electrophotographic patterning of an image definition material and methods therefor
US9639050B2 (en)	2012-07-12	2017-05-02	Xerox Corporation	Electrophotographic patterning of an image definition material
US9316993B2 (en)	2012-07-12	2016-04-19	Xerox Corporation	Electrophotographic patterning of an image definition material
US8586277B1 (en)	2012-07-12	2013-11-19	Palo Alto Research Center Incorporated	Patterning of an image definition material by electro-wetting
US9529307B2 (en)	2012-07-12	2016-12-27	Palo Alto Research Center Incorporated	Imaging system for patterning of an image definition material by electro-wetting and methods therefor

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US4064801A (en)	1975-08-12	1977-12-27	Ryco Graphic Manufacturing, Inc.	Spray dampening system for offset printing
US4198907A (en)	1977-05-05	1980-04-22	Ryco Graphic Manufacturing Inc.	Spray dampening system for offset printing with page control assembly
US4797686A (en) *	1985-05-01	1989-01-10	Burlington Industries, Inc.	Fluid jet applicator for uniform applications by electrostatic droplet and pressure regulation control
US4649818A (en)	1985-07-22	1987-03-17	Ryco Graphic Manufacturing, Inc.	Variable frequency pulsed spray dampening system
US4815375A (en)	1985-07-22	1989-03-28	Ryco Graphic Manufacturing, Inc.	Spray dampening system having alternate application control
US4738400A (en)	1987-02-11	1988-04-19	Almo Manifold & Tool Co.	Spray bar assembly
US4932319A (en)	1988-10-26	1990-06-12	Ryco Graphic Manufacturing, Inc.	Spray dampening system for offset press
US5025722A (en)	1990-01-22	1991-06-25	Ryco Graphic Manufacturing, Inc.	Adjustable spray dampening system
JP2689309B2 (ja)	1994-09-30	1997-12-10	株式会社東京機械製作所	平版印刷機のダンプニング装置
US5518183A (en) *	1994-10-28	1996-05-21	Waldrum Specialties, Inc.	Micro-orifice nozzle
US6116516A (en) *	1996-05-13	2000-09-12	Universidad De Sevilla	Stabilized capillary microjet and devices and methods for producing same
DE19838020A1 (de) *	1997-09-15	1999-03-18	Roland Man Druckmasch	Vorrichtung zum Auftragen von Feuchtmittel auf den Zylinder einer Rotationsdruckmaschine
US6109549A (en) *	1999-03-12	2000-08-29	Outboard Marine Corporation	Fuel injector for internal combustion engines and method for making same

1999
- 1999-11-03 US US09/433,160 patent/US6561090B1/en not_active Expired - Fee Related
2000
- 2000-10-07 EP EP00121915A patent/EP1097812B1/de not_active Expired - Lifetime
- 2000-10-07 AT AT00121915T patent/ATE346747T1/de not_active IP Right Cessation
- 2000-10-07 DE DE50013808T patent/DE50013808D1/de not_active Expired - Lifetime
- 2000-10-11 DE DE10050255A patent/DE10050255A1/de not_active Withdrawn
- 2000-11-02 JP JP2000336503A patent/JP4755332B2/ja not_active Expired - Fee Related

Also Published As

Publication number	Publication date
DE10050255A1 (de)	2001-07-12
DE50013808D1 (de)	2007-01-11
EP1097812A3 (de)	2002-05-22
JP2001162763A (ja)	2001-06-19
ATE346747T1 (de)	2006-12-15
US6561090B1 (en)	2003-05-13
EP1097812A2 (de)	2001-05-09
JP4755332B2 (ja)	2011-08-24

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Publication	Publication Date	Title
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