EP0332422A2 - Vorrichtung zum Verdampfen von Befeuchtungsmitteln - Google Patents

Vorrichtung zum Verdampfen von Befeuchtungsmitteln Download PDF

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Publication number
EP0332422A2
EP0332422A2 EP89302308A EP89302308A EP0332422A2 EP 0332422 A2 EP0332422 A2 EP 0332422A2 EP 89302308 A EP89302308 A EP 89302308A EP 89302308 A EP89302308 A EP 89302308A EP 0332422 A2 EP0332422 A2 EP 0332422A2
Authority
EP
European Patent Office
Prior art keywords
roller
printing press
blower
fan
dampening fluid
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
Application number
EP89302308A
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English (en)
French (fr)
Other versions
EP0332422A3 (en
EP0332422B1 (de
Inventor
Maurice Dale Smith
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0332422A2 publication Critical patent/EP0332422A2/de
Publication of EP0332422A3 publication Critical patent/EP0332422A3/en
Application granted granted Critical
Publication of EP0332422B1 publication Critical patent/EP0332422B1/de
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
    • B41F31/00—Inking arrangements or devices
    • B41F31/007—Removing water from ink trains

Definitions

  • the invention relates to lithographic printing presses and more particularly concerns a roller driven fan for evaporating dampening fluid which infiltrates the ink train during the lithographic printing process.
  • air compressor units for delivering pressurized air to jet manifolds or nozzles within the printing press is expensive in terms of power consump­tion, floor space, and plumbing costs. Further, air bars and manifolds sometimes limit access to the rollers in the press. Since it is desirable to control such evaporative systems in conjunction with the operation of the ink train to prevent excessive drying of the rollers when the press is momentarily stopped or otherwise not applying ink to the printing plate through the inking rollers; compressors must be either manually turned off during periods of roller inactivity or the cost and complexity of the evapora­tive system must be increased further by the incorpora­tion of automatic power or pneumatic relays.
  • a primary object of the invention is to provide a method and apparatus for easily and inexpensively evaporating excess dampening fluid from the ink train of a lithographic printing press.
  • the apparatus disclosed herein comprises an elongated transverse-flow fan impeller positioned to blow air on rollers in an ink train for evaporating dampening fluid.
  • the evaporative system operates in conjunction with the ink train and automatically discontinues operation when the inker rollers are momentarily stopped.
  • the improved method of evaporating liquid from the surface of a roller generally comprises the steps of mounting a transflow blower for rotation about a longitudinal axis which is spaced from and parallel to an axis about which the roller in the lithographic printing press rotates; rotating the roller; and driving the fan through a pulley and belt drive such that rotation of the roller imparts force to drive the fan such that the speed of rotation of the fan changes when the speed of rotation of the roller changes.
  • the dampening fluid evaporator includes a blower mounted adjacent a roller in a lithographic printing press to deliver air toward the surface of the roller to evaporate dampening fluid from the surface of the roller.
  • the blower is driven by a drive member operably connected to the roller; a driven member operably connected to the blower; and an elongated flexible drive member driven by the drive member on the roller for imparting force to drive the blower.
  • the blower has a plurality of blades, each of the blades having a tip and a heel mounted between end shrouds such that the tip of each blade points in the direction of rotation and such that the heel of each blade is positioned circumferentially rearly of the blade tip to form forwardly curved blades to draw and deliver air substantially tangentially of the impeller of the blower.
  • a method of evaporating dampening fluid from the surface of a roller in an ink train incorporating an elongated fan positioned adjacent a roller and coupled to the roller such that rotation of the roller imparts force to drive the fan.
  • the fan speed is controlled by the speed of rotation of the roller and requires no external souce of power.
  • a dampening fluid evaporator, generally designated by the numeral 70, is illustrated in Figure 1 of the drawing to evaporate excess dampening fluid from rollers in an inker system generally designated by the numeral 20 in a printing press.
  • the printing press is of conventional design and comprises a plate cylinder 12 having a printing lithographic plate 13 mounted on the surface thereof in rolling engagement with a blanket cylinder 14 rotatably supported between press side frames 15 and 16.
  • Inker 20 is of conventional design and comprises resilient surfaced inker form rollers 21, 22, 23 and 24 which apply ink and dampening fluid to the surface of lithographic printing plate 13.
  • An equalizer roller 26 is in rolling engagement with the last ink form roller 24.
  • Vibrator rollers 28, 30 and 32 oscillate lon­gitudinally relative to form rollers 21, 22, 23 and 24 for distributing ink onto the surface of the rollers and to eliminate "ghosting".
  • Ink is delivered to vibrator rollers 28 and 30 over ink supply rollers 34 and 36.
  • Ink supply roller 36 delivers ink to the surfaces of ink distributor rollers 38, 40, 42 and 45, as will be hereinafter more fully explained.
  • An equalizing roller 33 is in rolling engagement with roller 35 which engages ink supply rollers 34 and f36 and receives ink from ink supply rollers 48 and 50.
  • a ductor roller 52 oscillates between fountain roller 54 and ink supply roller 50.
  • Fountain roller 54 is submerged in a supply of ink 56 in ink reservoir 55.
  • Rollers 33 and 58 function as ink storage rollers engaging supply rollers 35 and 48 to equalize films and split films of ink carried by the surfaces of the rollers of the train of rollers in inker 20 enroute to the surface of printing plate 13.
  • Inker 20 is a conventional design and may assume other and further configurations.
  • the dampener system generally designated by the numeral 60 is of conventional design and preferably is of the type disclosed in U.S. Patent No. 3,343,484 for forming a thin film of dampening fluid and applying the film to the first inker form roller 21.
  • Dampener 60 generally comprises a hydrophilic transfer roller 62 in pressure indented relation with a resilient covered metering roller 64 which receives dampening fluid 66 from a reservoir 65. As metering roller 64 rotates, dampening fluid is carried on its surface to the nip between metering roller 64 and transfer roller 62. The surface speed of transfer roller 62 controls the rate at which a film of dampening fluid is offered to the surface of the first inker form roller 21.
  • the dampening system 60 is of conventional design and may assume other and further configurations.
  • ink from the ink reservoir 55 is delivered over a train of rollers in inker 20 and combined with a film of dampening fluid supplied by dampener 60 for applica­tion to the lithographic printing plate 13.
  • the inker 20 and dampening system 60 form no part of the present invention except in combination with the dampening fluid evaporator 70.
  • the film of dampening fluid formed by the dampening system 60 is applied to the surface of ink on the first inker form roller and dampens the hydrophilic non-image areas on the surface of printing plate 13 while ink is transferred to image areas on printing plate 13.
  • Some of the dampening fluid applied to printing plate 13 is transferred to the subsequent form rollers 22, 23 and 24 while a portion of the film of dampening fluid which remains on the first form roller 21 is transferred over roller 30 to other rollers in the inking system 20.
  • Dampening fluid evaporator 70 is preferably mounted to evaporate excess dampening fluid from the surface of ink distribution roller 45 to prevent accumulation of excessive quantities of dampening fluid on the surfaces of the train of rollers in inker 20.
  • ink distribution roller 45 has journals 44 and 46 formed on opposite ends thereof which are rotatably supported in bearings 17 and 18 on press sideframes 15 and 16.
  • Suitable drive means 90 is provided to transfer driving force from ink distributor roller 45 to the dampening fluid evaporator 70.
  • the drive means includes a pair of pulleys 92 and 96 and a flexible drive member 100.
  • Pulley 92 is secured by a key 94 to journal 44 of ink distribution roller 45.
  • Force is imparted to drive dampening fluid evaporator 70 by belt 100 which is positioned around pulley 92 and pulley 96 which is secured to tail shaft 75a of dampening fluid evaporator 70 by a key 98.
  • Ink distribution roller 45 rotatively contacts vibrator roller 28 which is rotated and oscillated axially by a system of gears (not shown) within printing press 10.
  • Ink distribution roller 45 is rotated in response to frictional forces imparted by the rotation of gear driven vibrator roller 28.
  • dampening fluid evaporator 70 can alternately be driven by an electri­cal motor or by a gear system within the printing press 10 without departing from the scope and spirit of the invention.
  • dampening fluid evaporator 70 comprises an elongated fan assembly in a housing 71 having end shrouds 72 and 73, tail shafts 75a and 75b, end bearings 76 and 77, and an impeller generally desig­nated by the numeral 80.
  • the fan incorporated into the evaporator 70 is commercially available from Dayton Electric Manufactur­ing Co. of Chicago, Illinois and is generally referred to as a "Dayton" transflow blower Model 4C874.
  • the blower is a single speed unit designed for heating, cooling, exhausting, ventilating and drying applica­tions.
  • the blowers are conventionally driven by a shaded-pole motor with automatic-reset thermal protec­tion.
  • Dayton form 5S2814 which is incorporated herein by reference in its entirety, contains a description and specifications of the blower.
  • the transverse-flow fan illustrated in Figures 2-4 advantageously causes the air to pass through the blades 79 twice, entering substantially tangentially through the tip, passing across the impeller 80 and out the other side.
  • the fan housing 71 is designed to provide the transverse flow of air.
  • the end shrouds 72 and 73 have no inlet holes. It should be appreciated that since the fan impeller 80 does not depend upon flow of air in an axial direction, the blade length and tip diameter ratios are limited only by structural considerations. Thus, the impeller 80 having an outside diameter of approximately 2.5 inches and a length for example, 38 inches provides a substantially uniform flow of air along the length of the impeller 80.
  • Impeller 80 comprises spaced circular retaining end plates 81 and 84, stabilizing plates 82 and 83, and a plurality of fan blades 79, each fan blade 79 having a heel 85, a curved central body portion 86, and a tip 87.
  • fan blades 79 are perpendicularly disposed relative to press side frames 15 and 16 and are secured between retaining plates 81 and 84 in circular fashion relative to retaining plates 81 and 84 such that fan blades 79 are symmetrically disposed at equidistant intervals along the periphery of retaining plates 81 and 84 forming a cylindrical impeller 80.
  • Fan blades 79 are angularly disposed between retaining plates 81 and 84 such that as impeller 80 is rotated, the tip 87 of each fan blade 79 serves as a leading edge of the fan blades 79 and the heel 85 serves as a trailing edge of fan blade 79 relative to the direction of rotation.
  • Fan blades 79 are provided with a shallow forward curved central body portion 86 which points both tip 87 and heel 85 in the direction of rotation of the impeller 80.
  • Stabilizing plates 82 and 83 are positioned between and at equidistant intervals from retaining plates 81 and 84. Fan blades 79 extend longitudinally through corresponding slots (not shown) in stabilizing plates 82 and 83.
  • Stabilizer plates 82 and 83 are essentially "washer shaped", having a circular con­figuration of equal diameter as retaining plates 81 and 84, substantially flat surfaces disposed perpen­dicularly to fan blades 79, and a central bore there-­through.
  • Retaining plates 81 and 84 are secured to shafts 75a and 75b which extend through bearings 76 and 77, respectively along a central axis 74 for permitting rotation of impeller 80 around central axis 74.
  • End bearing 77 is secured to the end shroud 73 of housing 71.
  • End bearing 76 is secured to the end shroud 72 of housing 71.
  • End shroud 72 has an aperture 78 aligned with central axis 74 for permitting the tail shaft 75a extending through end bearing 76 to extend lon­gitudinally through aperture 78 to the outside of housing 71.
  • Pulley 96 is secured to tail shaft 75a by key 98.
  • housing 71 comprises a cover shield 101, and a directional member 104 positioned in spaced apart relation around impeller 80 and secured between end shrouds 72 and 73.
  • Cover shield 101, directional member 104, and end shields 72 and 73 substantially enclose impeller 80 and cause air to be channeled through the openings therebetween, said openings serving as air intake vent 88 and blower port 93.
  • Cover shield 101 having a curved rear portion 108 and a substantially straight front portion 109 is axially positioned above and adjacent to impeller 80 such that the curved rear portion 108 is positioned in eccentric alignment around impeller 80 and the front portion 109 extends away form impeller 80 toward ink distribution roller 45 for channeling air from impeller 80 and directing air to impinge on ink distribution roller 45.
  • the eccentric alignment of the curved rear portion 108 of cover shield 101 and impeller 80 forms a progressively expanding air acceleration chamber 59 between cover shield 101 and impeller 80 extending from the rear of impeller 80 and tapering outwardly to blower port 93.
  • Directional member 104 comprises an angular channel having an upper fin 105 and a lower fin 106 and is positioned between impeller 80 and ink distribution roller 45.
  • Directional member 104 is perpendicularly aligned relative to side frames 15 and 16 and secured at its ends to end shrouds 72 and 73.
  • Upper fin 105 of directional member 104 is aligned in parallel spaced apart relation to front portion 109 of cover shield 101, the space therebetween forming blower port 93 for directing air from impeller 80 to impinge against ink distribution roller 45.
  • Lower fin 106 is angularly inclined relative to upper fin 105.
  • End shrouds 72 and 73 enclose the ends of evapor­ator 70, the lower portion of each having a pair of outwardly extending anchor lugs 61.
  • Mounting plates 107 extend perpendicular relative to axis 74, spanning the distance between the corresponding anchor lugs 61 and secured to the bottom of evaporator 70 by means of bolts 99 extending through anchor lugs 61.
  • the curved portion 108 of cover shield 101 and lower fin 106 of directional member 104 are positioned on opposite sides of impeller 80, the space therebetween and beneath impeller 80 forming air intake vent 88.
  • U-clamps 67 and 68 are positioned around a tubular cross member 69 in printing press 10 and secured to evaporator 70 by means of bolts 99 extending through anchor lugs 61 and mounting plate 107 grippingly engaging tubular cross member 69 between clamps 67 and 68 and mounting plate 107 for securing evaporator 70 in printing press 10.
  • Tubular cross member 69 is a convention structural component in printing press 10 and is disposed in perpendicular relation to side frames 15 and 16. It will of course be appreciated that evaporator 70 may be secured within printing press 10 in a variety of ways, (i.e., by brackets mounted on side frames 15 and 16) depending upon the structural configuration of the particular printing press 10.
  • Dampening fluid is evaporated from the surface of a roller 45 in inking system 20 by positioning a fan 80 adjacent roller 45 and providing appropriate drive means 90 coupling roller 45 and fan 80 such that the rotation of roller 45 imparts force to drive fan 80 causing air to impinge against roller 45 for evaporating dampening fluid on the surface of roller 45.
  • a transflow blower 80 is mounted in a printing press 10, parallel and adjacent to ink distribution roller 45 and driven by a flexible belt mounted around a drive pulley secured to roller 45, and a driven pulley secured to transflow blower 80.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP89302308A 1988-03-08 1989-03-08 Vorrichtung zum Verdampfen von Befeuchtungsmitteln Expired - Lifetime EP0332422B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16551988A 1988-03-08 1988-03-08
US165519 2002-06-07

Publications (3)

Publication Number Publication Date
EP0332422A2 true EP0332422A2 (de) 1989-09-13
EP0332422A3 EP0332422A3 (en) 1990-05-23
EP0332422B1 EP0332422B1 (de) 1995-06-07

Family

ID=22599245

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89302308A Expired - Lifetime EP0332422B1 (de) 1988-03-08 1989-03-08 Vorrichtung zum Verdampfen von Befeuchtungsmitteln

Country Status (2)

Country Link
EP (1) EP0332422B1 (de)
DE (1) DE68922925T2 (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0568256A1 (de) * 1992-05-01 1993-11-03 Hewlett-Packard Company Luftströmungssystem für einen thermischen Tintenstrahldrucker
US5399039A (en) * 1992-05-01 1995-03-21 Hewlett-Packard Company Ink-jet printer with precise print zone media control
US5406316A (en) * 1992-05-01 1995-04-11 Hewlett-Packard Company Airflow system for ink-jet printer
US5406321A (en) * 1993-04-30 1995-04-11 Hewlett-Packard Company Paper preconditioning heater for ink-jet printer
US5461408A (en) * 1993-04-30 1995-10-24 Hewlett-Packard Company Dual feed paper path for ink-jet printer
US5467119A (en) * 1992-05-01 1995-11-14 Hewlett-Packard Company Ink-jet printer with print heater having variable heat energy for different media
US5479199A (en) * 1992-05-01 1995-12-26 Hewlett-Packard Company Print area radiant heater for ink-jet printer
WO1996016806A1 (fr) * 1994-11-25 1996-06-06 Brepols N.V. Procede et dispositif d'indication de rebuts dans une presse rotative appliquant un procede lithographique
US5581289A (en) * 1993-04-30 1996-12-03 Hewlett-Packard Company Multi-purpose paper path component for ink-jet printer
US5774141A (en) * 1995-10-26 1998-06-30 Hewlett-Packard Company Carriage-mounted inkjet aerosol reduction system
US5774155A (en) * 1992-05-01 1998-06-30 Hewlett-Packard Company Ink-jet printer having dual drying system
DE4206525C2 (de) * 1992-03-02 2001-05-17 Heidelberger Druckmasch Ag Vorrichtung zur Beeinflussung einer Feuchtmittelverteilung in einem Druckwerk einer Druckmaschine
JP2006168276A (ja) * 2004-12-17 2006-06-29 Komori Corp 印刷機
WO2021230885A1 (en) * 2020-05-15 2021-11-18 Hewlett-Packard Development Company, L.P. Printing apparatuses comprising a bottom face to transfer heat

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19924997A1 (de) * 1999-05-31 2000-12-07 Heidelberger Druckmasch Ag Farbwerk für eine Druckmaschine
DE19926749B4 (de) * 1999-06-11 2008-11-20 Heidelberger Druckmaschinen Ag Farbwerk für eine Druckmaschine
DE102012222774B4 (de) * 2012-12-11 2016-09-15 Koenig & Bauer Ag Druckeinheit einer Druckmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE534655A (de) *
US2196412A (en) * 1938-07-25 1940-04-09 Roberts & Porter Inc Dampener for printing presses
US3276363A (en) * 1963-12-09 1966-10-04 Siemens Ag Device for inking high-speed printer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE534655A (de) *
US2196412A (en) * 1938-07-25 1940-04-09 Roberts & Porter Inc Dampener for printing presses
US3276363A (en) * 1963-12-09 1966-10-04 Siemens Ag Device for inking high-speed printer

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4206525C2 (de) * 1992-03-02 2001-05-17 Heidelberger Druckmasch Ag Vorrichtung zur Beeinflussung einer Feuchtmittelverteilung in einem Druckwerk einer Druckmaschine
US5774155A (en) * 1992-05-01 1998-06-30 Hewlett-Packard Company Ink-jet printer having dual drying system
US5479199A (en) * 1992-05-01 1995-12-26 Hewlett-Packard Company Print area radiant heater for ink-jet printer
US5399039A (en) * 1992-05-01 1995-03-21 Hewlett-Packard Company Ink-jet printer with precise print zone media control
US5446487A (en) * 1992-05-01 1995-08-29 Hewlett-Packard Company Air evacuation system for ink-jet printer
EP0568256A1 (de) * 1992-05-01 1993-11-03 Hewlett-Packard Company Luftströmungssystem für einen thermischen Tintenstrahldrucker
US5467119A (en) * 1992-05-01 1995-11-14 Hewlett-Packard Company Ink-jet printer with print heater having variable heat energy for different media
US5406316A (en) * 1992-05-01 1995-04-11 Hewlett-Packard Company Airflow system for ink-jet printer
US5589866A (en) * 1992-05-01 1996-12-31 Hewlett-Packard Company Air evacuation system for ink-jet printer
US5581289A (en) * 1993-04-30 1996-12-03 Hewlett-Packard Company Multi-purpose paper path component for ink-jet printer
US5461408A (en) * 1993-04-30 1995-10-24 Hewlett-Packard Company Dual feed paper path for ink-jet printer
US5406321A (en) * 1993-04-30 1995-04-11 Hewlett-Packard Company Paper preconditioning heater for ink-jet printer
WO1996016806A1 (fr) * 1994-11-25 1996-06-06 Brepols N.V. Procede et dispositif d'indication de rebuts dans une presse rotative appliquant un procede lithographique
US5774141A (en) * 1995-10-26 1998-06-30 Hewlett-Packard Company Carriage-mounted inkjet aerosol reduction system
JP2006168276A (ja) * 2004-12-17 2006-06-29 Komori Corp 印刷機
WO2021230885A1 (en) * 2020-05-15 2021-11-18 Hewlett-Packard Development Company, L.P. Printing apparatuses comprising a bottom face to transfer heat

Also Published As

Publication number Publication date
EP0332422A3 (en) 1990-05-23
DE68922925T2 (de) 1995-11-30
DE68922925D1 (de) 1995-07-13
EP0332422B1 (de) 1995-06-07

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