EP0335967B1 - Systeme de lavage automatique de blanchet a ecoulement a travers des barres de pulverisation - Google Patents

Systeme de lavage automatique de blanchet a ecoulement a travers des barres de pulverisation Download PDF

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Publication number
EP0335967B1
EP0335967B1 EP88910247A EP88910247A EP0335967B1 EP 0335967 B1 EP0335967 B1 EP 0335967B1 EP 88910247 A EP88910247 A EP 88910247A EP 88910247 A EP88910247 A EP 88910247A EP 0335967 B1 EP0335967 B1 EP 0335967B1
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EP
European Patent Office
Prior art keywords
spray
fluid
unit
wash
mixture
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.)
Revoked
Application number
EP88910247A
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German (de)
English (en)
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EP0335967A1 (fr
Inventor
James C. Tosti
Raymond J. Allain
John C. Sousa
Thomas R. Patterson
Henry. P. Bolduc, Jr.
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Precision Engineered Systems Inc
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Precision Engineered Systems Inc
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Publication date
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Application filed by Precision Engineered Systems Inc filed Critical Precision Engineered Systems Inc
Priority to AT88910247T priority Critical patent/ATE71584T1/de
Publication of EP0335967A1 publication Critical patent/EP0335967A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/2486—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device with means for supplying liquid or other fluent material to several discharge devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
    • B05B12/1418—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet for supplying several liquids or other fluent materials in selected proportions to a single spray outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/02—Spray pistols; Apparatus for discharge
    • B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
    • B05B7/0884—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point the outlet orifices for jets constituted by a liquid or a mixture containing a liquid being aligned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/24—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with means, e.g. a container, for supplying liquid or other fluent material to a discharge device
    • B05B7/26—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device
    • B05B7/28—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device in which one liquid or other fluent material is fed or drawn through an orifice into a stream of a carrying fluid
    • B05B7/32—Apparatus in which liquids or other fluent materials from different sources are brought together before entering the discharge device in which one liquid or other fluent material is fed or drawn through an orifice into a stream of a carrying fluid the fed liquid or other fluent material being under pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/06—Cleaning arrangements or devices for offset cylinders
    • 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
    • B41P2235/26—Spraying devices

Definitions

  • the present invention relates to printing presses and more particularly to systems for automatically washing blankets on blanket cylinders of offset printing units.
  • the present invention provides an automatic blanket wash system that overcomes difficulties in the prior art by providing for a flow through spray bar.
  • a plurality of spray system units are disposed in a first fluid path.
  • Each spray system unit has a fluid input and a fluid output and includes upper and lower spray bars for spraying the mixture respectively onto the upper and lower blankets of the printing unit with which the spray system unit is associated.
  • a spray control arrangement associated with each spray unit, causes, upon activation, the mixture to be sprayed by the spray bar.
  • a supply line is in fluid communication with a reservoir and the spray system units.
  • a return line is also in fluid communication with the spray system units and the reservoir.
  • a delivery arrangement delivers quantities of water and solvent into the reservoir in predetermined proportions.
  • a pumping arrangement causes circulation of the mixture from the reservoir through the supply line, through the first fluid path, through the return line, and then back to the reservoir.
  • the circulation of the mixture prevents settling of the solvent and to ensure homogeneity of the mixture throughout the system.
  • a wash control arrangement implements the wash cycle, including actuating the spray control arrangement so as to cause the mixture to be sprayed by the spray bars.
  • the pumping arrangement circulates the mixture through the system.
  • a pressure control arrangement upon actuation by the wash control arrangement, increases fluid pressure in the system upon implementation of the wash cycle.
  • each spray bar includes a second fluid path therethrough disposed between a unit fluid input and a unit fluid output.
  • a diverter arrangement is disposed between the unit fluid input and the second fluid path and is normally closed. Upon actuation by the wash control arrangement, the diverter arrangement permits the mixture to flow through the second fluid path in each spray bar.
  • the pumping arrangement circulates the mixture throughout the system normally at low pressure.
  • the wash control arrangement includes an arrangement for implementing a wash cycle as follows. First, the wash control arrangement actuates the diverter arrangement to permit the mixture to flow through the second fluid path within the spray bar. Then the wash control arrangement actuates the pressure control arrangement to increase the fluid pressure within the second fluid path within the spray bars. Finally, the wash control arrangement actuates the spray control arrangement so as to cause the mixture to be sprayed by the spray bars.
  • FIG. 1 shows the basic fluid flow in accordance with a preferred embodiment of the present invention.
  • a system control enclosure and mixture reservoir 11 receives water over line 114 and solvent over line 113. These are permitted to enter a common reservoir in item 11 where they mix.
  • the washing mixture is delivered via supply line 111, to a plurality of unit controls 121, 122, 123, and 124; each unit control is associated with a single printing unit having upper and lower blankets that may be in need of cleaning.
  • These printing units are identified as items 131-134 respectively.
  • upper spray bar 125 and lower spray bar 126 associated with the upper and lower blanket cylinders of unit 134.
  • similar spray bars are disposed with respect to each of the other printing units.
  • Each spray bar is in fluid communication with the unit control for its particular printing unit. From each unit control, here item 124, there is provided a return line 112 back to the reservoir in item 11.
  • the washing mixture is circulated continuously through the supply line 111 and back through the return line 112 to the reservoir. In this fashion, the washing mixture is mixed on a continuous basis.
  • the system handles effectively a mixture of TEX 300 Concentrate, with water, available from Printex Products Corp., P.O. Box 1479, Rochester, NY 14603. This solvent forms a milky-white emulsion when mixed with water, but is subject to settling unless the mixture is continuosly agitated.
  • the present invention provides the agitation inside a mixing tank in the reservoir and by continuous circulation. A chemical solvent in the mixture, upon spraying of the blanket, lifts foreign matter from the blanket of the blanket cyclinder. The printed paper web, by way of absorbtion, then carries the lifted foreign matter away from the blankets.
  • the automatic blanket wash system described so far herein can also be configured to service multiple press lines.
  • a central supply line 141 is in direct fluid communication with the reservoir 11 and the supply line 111 for a press line subsystem servicing an individual press line.
  • a central return line 142 is also in direct fluid communication with the reservoir 11 and the return line 112 from the press line subsystem servicing the press line.
  • the central supply line 141 and the central return line 142 have one way check valves 139 disposed therein for insuring circulation of the mixture in only one direction through the system.
  • Supply line 111 in a preferred embodiment, has associated therewith a pneumatic accumulator 137 disposed along supply line 111 and in communication with a central air supply line 145.
  • the accumulator 137 is pre-charged by compressed air to between 65 and 75 psig. Prior to spraying, the hydraulic pressure within the system is increased to 80 psig.
  • the accumulator 137 provides a stored cushion of pneumatic pressure in the range of 75 psig against the hydraulic pressure in the system. As the fluid pressure in the system drops below 80 psig upon the commencement of spraying the accumulator 137 provides a pressure back-up to maintain pressure in the system during spraying at 65-75 psig.
  • the return line 112 also has a one way check valve 139 associated therewith for insuring circulation of the mixture in only one direction through the return line 112.
  • a restrictive orifice is disposed in the central return line 142 at the mixing tank (see item 21, Fig. 2) disposed inside the reservoir 11.
  • the restrictive orifice causes the mixture to enter the mixture reservoir 11 under increased pressure, thereby aiding in the agitation of the mixture within the reservoir 11 and, thus, further insuring a homogeneous mixture for recirculation.
  • a press line shut off valve 138 is also disposed in the supply line 111 to each press line subsystem servicing an individual press line for shutting off the plurality of spray system units servicing the individual press line under conditions described below.
  • each spray system unit includes a diverter valve (shown in Figure 3) in the unit controls 121-124.
  • the diverter valve in a first position, the diverter valve shunts out the second fluid path to permit fluid to flow directly from the unit's fluid input 135 to its fluid output 136, such diverter valve being normally disposed in the first position.
  • the diverter valve permits fluid flow from the unit's fluid input 135, through the fluid path within the spray bars 125 and 126, to the unit's fluid output 136.
  • the diverter valve is actuatable by the wash control arrangement and, in a preferred embodiment, is pneumatically activated.
  • the wash control arrangement includes an arrangement for actuating the diverter valve to dispose the valve in the second position, so as to permit recirculation of the mixture in the spray system unit just prior to actuation of the spray valves.
  • the mixture is circulated through the system under low pressure.
  • the unit controls 121-124 are actuated to open the respective diverter valves permitting fluid flow from the unit control input to the spray bars associated with each unit control.
  • a wash valve in the return line 142 (shown as item 211 in Figure 2) is closed, causing an increase in pressure in the system. Diverting circulation away from the fluid paths within the spray bars until just prior to commencement of spraying prevents leakage of the mixture from the spray valves disposed in each spray bar.
  • circulation of the mixture through the system under low pressure until just prior to the commencement of spraying prevents leakage of the mixture throughout the system.
  • a solenoid valve (shown in Fig 3) in each unit control box 121-124 is in communication with an air supply line 115 and controls the flow of air from the air supply line 115 to pneumatically actuated valves in each spray system unit. ( Figures 4-6, 8-9).
  • the solenoid Upon activation by the wash control arrangement, the solenoid activates the pneumatic valve associated with each spray nozzle so as to cause the mixture to be sprayed by the spray nozzle.
  • the air supply line 115 for each press line subsystem is in direct communication with a central air supply line 145.
  • Figure 1 shows the spray system units disposed in parallel along the first fluid path, between the supply line 111 and the return line 112.
  • the fluid input 125 of each spray system unit is in direct communication with the supply line 111 and the fluid output 136 of each spray system unit is in direct communication with the return line 112.
  • each press line subsystem in the multiple press line configuration, is disposed in parallel between the central supply line 141 and the central return line 142.
  • the spray system units are disposed in parallel along the first fluid path
  • the spray system units can also be disposed in series along the first fluid path.
  • one of the spray system units is the first spray system unit in the series and another of the spray system units is the last spray system unit in this series.
  • the fluid output of each spray system unit is then in communication with the fluid input of the next spray system unit in the series.
  • the fluid input of the first spray system unit is then in direct communication with the supply line and the fluid output of the last spray system unit is in direct communication with the return line.
  • solvent is pumped by pump 242 from solvent reservoir 27 through solvent metering valve 252 into the mixture reservoir 21 holding the wash mixture.
  • Water enters under line 114 through water pressure reducing regulator 113 and water metering valve 251.
  • Pressure in the solvent flow is regulated by pressure valve 243.
  • Specific gravity of the wash mixture is monitored by density sensor 261 and a specific gravity readout 263 is provided, so that if a specific gravity is outside predetermined limits, the system may be shut down or the quantities of water or solvent in the reservoir 21 may be altered.
  • pump system 23 pumps the wash mixture from reservoir 21 over lines 141 and 111 past the mixture density sensor 261, past each of the unit control boxes, including unit control box 12, which is illustrated with its associated spray bars. There is also provided a return lines 112 and 142 back to the mixture reservoir 21.
  • all the seals throughout the system are either Teflon or Viton and are essentially inert to the mixture circulating through the system.
  • the wash control valve 211 On initiation of the wash cycle, the wash control valve 211 is closed, in a preferred embodiment, by the wash control arrangement 22 and pressure builds up in the supply line 111. Maximum pressure in the fluid supply line is regulated by pressure valve 231 interposed between the supply line 111 and the reservoir 21. Typically, the pressure build-up is regulated in the vicinity of 80 pounds per square inch (550 K Pa).
  • the actuation of the wash control valve is performed by the spray control system 22 in accordance with systems well known in the art.
  • spray of the wash mixture is permitted to emanate from the spray bar in a range of about one-half to one second.
  • the web, or paper, itself serves to blot out the wash mixture from the blanket cylinder.
  • the valves in the unit controls may be actuated in any desired sequence. Under one protocol, the spray system unit associated with the printer spray system unit associated with the unit most remote from the web dryer is actuated first, then the next remote, etc.; this protocol minimizes the amount of web wasted since the portion of the web serving to blot the most remote unit may also serve to blot the next most remote unit, etc.
  • Figure 3 shows the unit control box 31 in detail.
  • the mixture in a preferred embodiment, is normally circulated through the system under low pressure and circulated from the supply line through the unit input connection 33 through the diverter valve 32, which is normally closed.
  • the mixture therefore, normally circulates from the unit fluid input connection 33 through the diverter valve 32 and through circulation line 312 and out through the unit fluid output connection 310.
  • the diverter valve 32 Upon initiation of the wash cycle, the diverter valve 32 is pneumatically actuated by a solenoid valve 39 to allow the mixture to flow through the upper and lower spray bars associated with the unit control 31. Upon actuation of the diverter valve 32, the mixture flows through the fluid path within each the upper and the lower spray bars via input lines 38A and 38B, respectively, and then out of each spray bar via return lines 38C and 38D, respectively.
  • a flow detector 35 is located downstream of the diverter valve 32 to monitor if a failure has occurred to the diverter valve 32 and the mixture is flowing into the spray bars at any time other than during the wash cycle.
  • the flow detector 35 In the event the flow detector 35 detects flow of the mixture at any time other than during the wash cycle, the flow detector 35 will transmit a fail signal to the wash control arrangement thereby setting in motion a command to shut off the mixture supply valve 138 (see Fig 1) to the press line subsystem servicing the individual press line.
  • fluid pressure within the fluid paths is increased, as described above.
  • the spray valves in the spray bars are pneumatically activated by two small three-way solenoid valves 36A and 36B, associated with the upper and lower spray bars respectively, thereby causing the spray valves to spray the mixture.
  • Each solenoid valve 36A and 36B has a pressure switch 37A and 37B associated therewith for monitoring the proper operation of the solenoid valves 36A and 36B respectively.
  • the switches are electrically wired to assure a fail safe mode. If either solenoid valve 36A or 36B opens at anytime other than during the wash cycle, the respective pressure switch, 37A or 37B, will transmit a fail signal to the wash control arrangement thereby setting in motion a command to shut off the mixture supply valve 138 (see Fig.1) to the press line subsystem servicing the individual press line.
  • each return line 38C and 38D has a spring-loaded check valve 34 therein placed near the circulating line 312 within the unit control, to assure circulation of the mixture through the spray bar in only one direction and preventing any flow of the mixture from the circulation line 312 into the spray bar through the return lines 38C and 38D.
  • a venturi insert 313 is incorporated into a connecting tee 314, between the unit spray bar return line 38D and the circulation line 312, to produce a low pressure status over the two intersecting return lines 38C and 38D, thereby assuring that the static pressures inside the spray bars are lower than the circulating mixture pressure.
  • FIG. 4 shows an integral flow through spray bar in accordance with the embodiment discussed herein.
  • Spray bar manifold 41 has integral valve bodies disposed therein. Each valve body has a nozzle assembly 44 protruding from the surface of the spray bar manifold 41 and from which the spray mixture emanates.
  • Each spray bar in a preferred embodiment, is divided into sections, preferably quadrants. A quadrant, or web size, control valve 42 regulates spraying of the mixture by the valve bodies disposed within the section.
  • the spray bar manifold contains as many spray valves as required to provide proper distribution of the mixture across the face of a blanket. The number, in a preferred embodiment of the invention, is always a multiple of four so the blanket wash system can accomodate running a quarter web, half web, three quarter web or a full web.
  • Each spray valve disposed within the spray bar manifold 41 also has an overriding manual valve stop 43 associated therewith.
  • the overriding manual stop 43 on each nozzle prevents the spray valve from opening and the spray nozzle from spraying even when a pneumatic signal is applied to the spray valve. This allows a pressman to control the width of the spray pattern to conform to web widths other than the quarter, half, three quarters and full web adjustable by the quadrant control valves 42.
  • the spray bar manifold 41 of Fig. 4 is shown with four passages running lengthwise through the manifold.
  • Two passages 51 and 52 are approximately a half inch in diameter and provide a passageway for supply and return of the mixture through the spray bar.
  • the spray bar manifold also has two smaller passages 54 and 55 running therethrough for pneumatic pressure to actuate the spray valves.
  • a series of machined cavities 59 to house the nozzle assembly 56, pneumatic actuated valve 57 and the overriding manual stop valve 58.
  • a valve spring 64 forces a piston stem 62 containing the piston seat 61 against the base of the nozzle assembly 66, thus preventing any mixture from passing through the nozzle.
  • pneumatic pressure is applied to the piston 65, forcing the piston seat 61 to move away from the base of the nozzle 66, thus opening a flow path for the mixture to enter the nozzle 66.
  • the valve spring 64 closes the valve.
  • the piston 65 is the pneumatically actuated portion of the spray valve. It is a machined part of primarily two diameters. One diameter of approximately ⁇ 75 inches is the pneumatic piston 65 with its own packing to seal between the body of the piston and the valve body cavity 53. The other diameter of approximately ⁇ 25 inches is the stem portion 62 of the piston. It contains two o-rings 63 for sealing purposes. The o-ring 63A toward the nozzle is the seal to prevent solvent from entering the pneumatic portion of the nozzle assembly. The second o-ring 63B toward the piston prevents leakage of air into the mixture side of the nozzle assembly. The stem portion 62 of the piston is counterbored to contain the valve seat.
  • the nozzle assembly 66 includes the hydraulic nozzle 67, mounting flange 68 for holding the nozzle in the extruded manifold in the proper orientation and an o-ring seal 63A to prevent solvent leakage around the assembly.
  • the hydraulic nozzle 67 of the preferred embodiment of the invention with a supply pressure of 80 psig, produces a fan shaped spray pattern which has an included angle of approximately 89 degrees and a flow rate of approximately 0.14 GPM.
  • the nozzle assemblies 66 in conjunction with the appropriate nozzle-to-nozzle spacing, provides the necessary distribution of mixture across the face of the blanket.
  • the back portion of the nozzle assembly serves as the mating surface for the valve seat 61 contained in the stem 62 of the piston.
  • Figure 7 shows the web size control valve 71 disposed in the spray bar 72.
  • the web size control valve 71 when in the closed position, prevents the pneumatic signal from the unit control from activating the spray nozzles in the quadrant or section.
  • the flow through spray bar of figure 8 performs the same functions as the integral flow through spray bar of figure 4 and, in addition, the valve assembly 81 thereof is commercially available.
  • the pneumatically actuated valve assembly 81 performs all the functions of the integral valve assembly described above in reference to figures 4 and 5 with the exception that the valve is external to the spray bar manifold 84, as shown in figure 8.
  • the spray valve 81 is secured to the spray bar manifold 84 by a nut 85 and cotter pin 86.
  • Each spray valve 81 also has a manual shut-off valve 82.
  • Figure 8 also shows the web size control valve 83.
  • Figure 9 shows a cross section of the spray bar manifold 84 of figure 8 with the spray nozzle 90 disposed therein.
  • the spray bar manifold 94 has two passageways 91 and 92 running lengthwise therethrough thereby forming a fluid path.
  • Each spray valve 90 has a fluid port 93 for intake of the mixture during spraying when the spray valve 90 is pneumatically activated.
  • the spray bar manifold 94 also has two smaller passages 96 and 97 running lengthwise therethrough for delivering a pneumatic signal via pneumatic port 95.
  • Figure 9 also shows the manual override valve 98 and the nut 99 and cotter pin 991 for securing the spray valve 90 to the spray bar manifold 94.
  • Figure 10 shows the web size control valve 101 disposed in the spray bar manifold 102 of the embodiment depicted in Fig. 8.
  • the passageways 103 and 104 for fluid and the smaller passageways 105 and 106 for the pneumatic signal are also shown.

Landscapes

  • Nozzles (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (9)

1. Un système automatique de lavage de blanchet pour la pulvérisation d'un mélange détergent sur un rouleau porte-blanchet d'un groupe de presse d'impression, le système comprenant:
(a) un réservoir;
(b) au minimum un élément de système de pulvérisation dans une voie de débit de liquide, chaque, élément de système de pulvérisation comportant une entrée de liquide et une sortie de liquide, et incluant une barre de pulvérisation pour pulvériser le mélange sur le rouleau porte-blanchet du groupe d'impression avec lequel le dit élément de pulvérisation est associé, la barre de pulvérisation comportant (i) la voie de débit de liquide la traversant d'un bout à l'autre et disposée entre l'entrée de liquide de l'élément de système de pulvérisation et la sortie de liquide de cet élément, et (ii) un robinet de pulvérisation;
(c) une conduite d'alimentation dans le liquide communiquant avec le réservoir et avec au minimum un élément de système de pulvérisation;
(d) une conduite de retour dans le liquide communiquant avec au minimum un élément de système de pulvérisation et arec le réservoir, et permettant le retour de liquide dans l'élément de système de pulvérisation, vers le réservoir;
(e) un moyen de pompage pour faire circuler le mélange à partir du réservoir et dans la conduite d'alimentation, vers la barre de pulvérisation; et
(f) un moyen de commande de lavage pour la commande du robinet de pulvérisation, de façon à assurer la pulvérisation du mélange par le robinet de pulvérisation au cours d'un cycle de lavage.
2. Un système selon la revendication 1, dans lequel:
(i) chaque élément de système de pulvérisation inclue un moyen de dérivation pour, dans une première position, permettre le débit du liquide, à partir de l'entrée de liquide de l'élément de système de pulvérisation, dans la barre de pulvérisation et vers la sortie de liquide de cet élément, et pour, dans une deuxième position, faire dériver la voie de débit du liquide dans la barre de pulvérisation de manière à permettre au liquide de se débiter directement, à partir de l'entrée de liquide de l'élément, dans une voie de débit de liquide alternative, vers la sortie de liquide de l'élément, ce moyen de dérivation étant actionné par le moyen de commande de lavage; et (ii) le moyen de commande de lavage inclue un moyen pour actionner le moyen de dérivation au cours du cycle de lavage.
3. Un système selon une des revendications 1 ou 2, comprenant en outre un moyen de commande de pression pour, lors de l'actionnement par le moyen de commande de lavage, augmenter la pression du liquide dans la voie de débit de liquide dans chaque barre de pulvérisation, avant le commencement de la pulvérisation.
4. Un système selon une des revendications 2-3, dans lequel le moyen de commande de lavage inclue un moyen pour la mise en action du cycle de lavage comme suit:
(a) actionnement du moyen de dérivation de manière à permettre au mélange de se débiter dans la voie de débit de liquide dans la barre de pulvérisation;
(b) actionnement du moyen de commande de pression de façon à augmenter la pression du liquide dans la voie de débit de liquide dans la barre de pulvérisation; et
(c) actionnement du moyen de commande de lavage de manière à assurer la pulvérisation du mélange par la barre de pulvérisation.
5. Un système selon une des revendications 3 ou 4, dans lequel le moyen de commande de pression comprend un moyen de vanne de lavage disposé dans la conduite de retour pour, lors de l'actionnement par le moyen de commande de lavage, restreindre rigoureusement le débit dans la conduite de retour.
6. Un système selon une quelconque des revendications 2-5, dans lequel le moyen de commande de lavage inclue un moyen pour mettre dans la deuxième position le moyen de dérivation, à tout moment autre que pendant le cycle de lavage.
7. Un système selon une quelconque des revendications 1-6, comprenant en outre:
un moyen basse pression, associé avec chique élément de système de pulvérisation, pour la production, à l'intérieur de la voie de débit de liquide dans la barre de pulvérisation, et à tout moment autre que durant le cycle de lavage, d'une pression de liquide plus basse que la pression du liquide dans le système automatique de lavage de blanchet à l'extérieur de la voie de débit de liquide dans la barre de pulvérisation.
8. Un système selon la revendication 7, dans lequel le moyen nasse pression comprend un insert venturi disposé dans la voie de débit de liquide à proximité de la sortie du liquide.
9. Un système selon une quelconque des revendications 1-8, incluant en outre un moyen accumulateur pour le maintien d'une haute pression dans la voie de débit de liquide dans la barre de pulvérisation lorsque le mélange est pulvérisé par la barre de pulvérisation.
EP88910247A 1987-08-17 1988-08-16 Systeme de lavage automatique de blanchet a ecoulement a travers des barres de pulverisation Revoked EP0335967B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88910247T ATE71584T1 (de) 1987-08-17 1988-08-16 Automatisches gummituchwaschsystem mit stroemung durch eine zerstaeuberstange.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US8633087A 1987-08-17 1987-08-17
US86330 1987-08-17
US13421887A 1987-12-16 1987-12-16
US134218 1987-12-16

Publications (2)

Publication Number Publication Date
EP0335967A1 EP0335967A1 (fr) 1989-10-11
EP0335967B1 true EP0335967B1 (fr) 1992-01-15

Family

ID=26774634

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88910247A Revoked EP0335967B1 (fr) 1987-08-17 1988-08-16 Systeme de lavage automatique de blanchet a ecoulement a travers des barres de pulverisation

Country Status (5)

Country Link
EP (1) EP0335967B1 (fr)
AT (1) ATE71584T1 (fr)
AU (1) AU2722188A (fr)
DE (1) DE3867838D1 (fr)
WO (1) WO1989001412A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4318647A1 (de) * 1993-06-04 1994-12-08 Baldwin Gegenheimer Gmbh Flüssigkeits-Sprühvorrichtung, insbesondere für Druckmaschinen

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5109770A (en) * 1989-09-22 1992-05-05 Oxy-Dry Corporation Printing cylinder cleaning system
EP0441019B1 (fr) * 1990-02-06 1995-07-12 Baldwin Technology Corporation Système de nettoyage de blachet par pulvérisation
US5303652A (en) * 1992-02-13 1994-04-19 Baldwin Technology Corporation Spray blanket cleaning system
DE4216389A1 (de) * 1992-05-18 1993-11-25 Baldwin Gegenheimer Gmbh Druckwerks-Waschvorrichtung für Druckmaschinen
DE202004001174U1 (de) * 2004-01-27 2004-04-08 Man Roland Druckmaschinen Ag Versorgungseinrichtung für eine Reinigungsvorrichtung in einer Verarbeitungsmaschine
DE102004063336A1 (de) * 2004-12-23 2006-07-06 Baldwin Germany Gmbh Flüssigkeitsversorgungseinrichtung für eine Druckmaschinen-Reinigungsvorrichtung
EP1719621B1 (fr) * 2005-05-02 2009-07-22 Baldwin Oxy-Dry GmbH Système de nettoyage pour les surfaces des cylindres d'une machine d'impression
DE102006015831A1 (de) * 2006-04-03 2007-10-11 Technotrans Ag Waschvorrichtung für eine Offset-Druckmaschine

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Publication number Priority date Publication date Assignee Title
CH473360A (de) * 1967-04-04 1969-05-31 Sulzer Ag Olbrenneranlage mit mindestens zwei Rücklaufbrennern oder mindestens zwei Gruppen von Rücklaufbrennern
US3508711A (en) * 1967-12-29 1970-04-28 Ryco Graphic Mfg Fluid dispensing system
US4197995A (en) * 1978-11-13 1980-04-15 Mccord Corporation Agricultural spraying assembly
US4686902A (en) * 1986-10-31 1987-08-18 Precision Engineered Systems Inc. Automatic blanket wash system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4318647A1 (de) * 1993-06-04 1994-12-08 Baldwin Gegenheimer Gmbh Flüssigkeits-Sprühvorrichtung, insbesondere für Druckmaschinen

Also Published As

Publication number Publication date
WO1989001412A2 (fr) 1989-02-23
EP0335967A1 (fr) 1989-10-11
AU2722188A (en) 1989-03-09
DE3867838D1 (de) 1992-02-27
WO1989001412A3 (fr) 1989-05-05
ATE71584T1 (de) 1992-02-15

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