US3900003A - Liquid developing device for electrophotography - Google Patents

Liquid developing device for electrophotography Download PDF

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Publication number
US3900003A
US3900003A US478976A US47897674A US3900003A US 3900003 A US3900003 A US 3900003A US 478976 A US478976 A US 478976A US 47897674 A US47897674 A US 47897674A US 3900003 A US3900003 A US 3900003A
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United States
Prior art keywords
developing
liquid
sensitive member
solution
developing solution
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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
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US478976A
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English (en)
Inventor
Tadashi Sato
Shunichi Kubo
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Canon Inc
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Canon Inc
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/10—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer
    • G03G15/104—Preparing, mixing, transporting or dispensing developer
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • G03G15/0105—Details of unit
    • G03G15/0121—Details of unit for developing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/37—Printing employing electrostatic force

Definitions

  • a liquid developing device for use in multicolor electrophotographic copying machines is provided with a [30] Foreign Application Priority Data plurality of feed pipes for supplying different liquid June 15, 1973 Japan 48-67438 color developers to a developing station, which feed pipes are connected to a common developer supply [52] US. Cl. 118/637; 118/104; 118/106; pipe. Valves are provided in the feed pipes wherein 6. 13 each of the valves are actuated by an electrical signal [51] Int. Cl G03g 13/06 to supply only a selected liquid color developer to a [58] F d Of Search 1 IOI/DIG. developing station at a time.
  • the liquid developing de- 35 1 /175 vice is also provided with a belt for removing residual liquid developer remaining on an image bearing mem- [56] References Cited ber after development and with a plurality of blades UNITED STATES PATENTS for scraping and collecting the thus removed liquid de- 3.661428 6/1972 Smith 118/637 Velopeh which are actuated correspohdehce with 3,687,708 8/1972 Miller 355/10 Selected 3,705,767 12/1972 Tamai et al.... 118/637 3,719,484 3/1973 I Egnaczak 355 4 19 7 Draw'hg F'gures PATENTEDAUGJ ems 38 00.003
  • This invention relates generally to a liquid developing device for electrophotography, and more particularly toan improved liquid developing device adapted for use in a multicolor electrophotographic copying machine, said system being small-sized and compact in mechanism and capable of reproducing color images of high quality.
  • a principal object of the present invention is to provide an improved liquid developing device for electrophotography whereby it is possible to develop the color images with high quality.
  • Another object of the present invention is to provide a small-sized and compact liquid developing device for electrophotography.
  • a further object of the present invention is to provide a liquid developing device for electrophotography incorporating the various improvements which are described in detail hereinbelow.
  • the latent images on a sensitive medium are developed by selectively supplying the developing solution of a designated color to a common developing electrode and the portion of the developing solution of each color which flows down from said electrode is carried out by a carriage means and collected separately from the developing solutions of other colors.
  • FIG. 1 is a side view of the device with the developer recovering means beingv shown in a declining position
  • FIG. 2 is a similar view to FIG. I but shows the developer recovering means arranged in a vertical position
  • FIG. 3 is also a similar view of the system where a squeeze roller is disposed between the sensitive member and the developer recovering means
  • FIG. 4 is a side elevation of the system as it was adapted to a copying machine using an endless belt-like sensitive member
  • FIG. 5 is a side elevation of the systemadapted to a copying machine in which the-endless belt-like sensitive member is arranged vertically
  • FIG. 7 is a perspective view of a part of the developing electrode assembly.
  • Reference numeral 1 designates a sensitive member which may be drum-shaped (FIGS. 1 to 3), belt-shaped (FIGS. 4 and 5) or reciprocative flat plate-shaped (FIG. 6).
  • This sensitive member may be of a type having a photoconductive layer and an electroconductive layer or a type having an insulating layer, a photoconductive layer and an electroconductive layer.
  • a charger Along the course of movement of said sensitive member are arranged a charger, a light image exposure means (or a
  • the present invention relates to the improvements in the developing means in the above-said steps.
  • Theliquid developer from a developer supply pump .(not shown) flows out from a supply pipe 3 at the ends of the developer feed pipes 3, 3.
  • each feed pipe being designed to feed developer of a designated color
  • each feed pipe being designed to feed developer of a designated color
  • the liquid developer which has flown out from said supply pipe 3 is provided as a uniform layer of liquid by a developer receiving plate 6 and further flows onto a developing electrode 7 such as shown in FIG. 7.
  • the latent image on the sensitive member 1 is devel-' oped by the developer on said electrode 7.
  • the belt 10 turns in a direction opposite to the movement of the sensitive member 1 by a driving shaft 11 while approaching to said member to such an extent as will not damage the image on said member when passing around a guide roller 9
  • the developer which has been used for developing the latent image on the sensitive member 1 further flows along the surfaces of the developing electrode 7 and a developer guide plate 8 and falls onto the belt 10 whereby said used developer,-adhering to the belt, is carried downwardly and scraped away from the belt by one of the recovery blades 13.
  • Said recovery blades are provided one for each color and arranged such that each of them is contacted with or separated from the belt l0by rotation of a retainer belt 14 and blade shaft 15.
  • the developer which was scraped down by the blades 13 is first collected in tanks 16 and then recovered in a developing tank (not shown).
  • the belt 10 is cleaned by a cleaning brush 17 so that said belt is cleared of any residual developer and again performs said transport of used developer for recovery.
  • the developer removed from the belt by the brush 17 is collected in a tank 18 and then discharged out therefrom through a pipe 19. It is desirable to fill the tank 18 with a cleaning liquid.
  • the belt 10 is larger in width than the sensitive member 1 and is provided with ridges along both edges thereof so that the developer will not be scattered off of the belt when the developer flowing down from the developing means 7 is received on the belt and when residual developer is scraped off by the blades 13.
  • the belt 10 is made of a conductive material such as metal, conductive rubber or conductive resin so that a bias voltage may be applied thereto, but the belt is insulated from the body portion of the device.
  • a bias voltage applied to the belt 10 is of the same polarity as the toner in the developer, an electrostatic repulsive force acts between the belt and toner to enhance the developing effect, while when said bias voltage is of the opposite polarity to the toner, an electrostatic suction force is produced to effect defogging at the non-image portion on the sensitive member.
  • the clearance between the developing electrode '7 and sensitive member 1 should be 0.2 to 2.0 mm.
  • said clearance should preferably be within the above-said range. However, such small clearanceproves insufficient to permit smooth flow-down of the developer staying on the electrode 7 after going through the developing step, and this may cause the developer to remain and deposit in the developing section.
  • a cam 26 is turned clockwise by a spring 27 during development so as to let the developing electrode-7 turn upwardly about the shaft 25 through a movable side plate 25 to thereby maintain said clearance. Then, during the period when development with developer of a certain color has been completed and; development is temporarily suspended until starting the development for the next color, power is connected to a solenoid 28 to energize it so as to let said cam 26 turn counterclockwise through a plunger 29 and a pin 29 integral therewith, causing downward movement of the electrode 7 to thereby expand the space between it and the sensitive member 1. After completion of development, any residual developer on the surface of the sensitive member is squeezed off by the action of corona discharge effected by a corona discharger 20.
  • FIG. 2 shows an embodiment where, instead of applying a bias voltage to the belt 10, said belt is turned in the same direction as the sensitive member 1 and a squeeze roller 21 applied with a bias voltage is disposed on the side where said belt separates away from the sensitive member I.
  • Said squeeze roller 21 is made of a conductive material such as metal, conductive rubber or conductive resin and is rotated at high speed in a direction opposite to the direction of rotation of the sensitive member so as to allow the residual developer to deposit on the belt 10 while yet further improving said developing effect.
  • FIG. 3 shows still another embodiment where a squeeze roller 21, the same as shown in FIG. 2, is disposed between the sensitive member 1 and the belt 10 such that said squeeze roller is positioned adjacent the sensitive member 1 and in contact with the belt'l0. According to this arrangement, any developer depositing on the squeeze roller 21 is wiped off by the belt 10 and recovered in its entirety, so that the squeeze roller contacts the sensitive memberalways in a cleaned state.
  • FIGS. 4 and 5 show a form or adaptation of the present invention to the developing system in a copying machine where the flexible sensitive member 1 is turned like an endless belt. In this case, too, it is possible to adapt modified forms of squeeze rollers such as shown in FIGS. 2 and 3. 1
  • FIG. 6 illustrates application of the developing device of the present invention'to acopying machine using a flat plate-shaped sensitive member.
  • FIGS. 1 to 6 like reference numerals are used to indicate like parts throughout.
  • a liquid developing device for electrophotography comprising:
  • a selective developing solution supply means whereby a developing solution of any designated color is selected from developing solutions of different colors and supplied to an electrophotographic sensitive member in successive relation with the developing solutions of other colors;
  • a common developing means disposed in a developing position to retain sequentially each said supplied developing solution on the surface of said sensitive member
  • said developing solution recovering means has a plurality of blades corresponding in number to the respective colors of developing solutions and mounted to be selectively contacted with the surface of said endless rotative structure such that the selected blade will recover the developing solution of the designated color, and reservoirs for collecting the respective developing solutions recovered by said respective blades.
  • a liquid developing device for electrophotography comprising:
  • selective developing solution supply means whereby a developing solution of any designated color is selected from developing solutions of different colors and supplied to an electrophotographic sensitive member in a successive relation with the developing solutions of ether colors;
  • selective developing solution supply means whereby a developing solution of any designated color is selected from developing solutions of different colors and supplied to an electrophotographic sensitive member in a successive relation with the developing solutions of other colors;
  • a developing solution squeeze roller provided between said developing means and said excess solution transport means.
  • selective developing solution supply means whereby a developing solution of any designated color is selected from a plurality of developing solutions of different colors and supplied to an electrophotographic sensitive member in a successive relation with the developing solutions of other colors;

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Wet Developing In Electrophotography (AREA)
  • Color Electrophotography (AREA)
US478976A 1973-06-15 1974-06-13 Liquid developing device for electrophotography Expired - Lifetime US3900003A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6743873A JPS5616424B2 (de) 1973-06-15 1973-06-15

Publications (1)

Publication Number Publication Date
US3900003A true US3900003A (en) 1975-08-19

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US478976A Expired - Lifetime US3900003A (en) 1973-06-15 1974-06-13 Liquid developing device for electrophotography

Country Status (5)

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US (1) US3900003A (de)
JP (1) JPS5616424B2 (de)
AU (1) AU7011474A (de)
DE (1) DE2428734A1 (de)
GB (1) GB1476782A (de)

Cited By (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4077358A (en) * 1976-05-17 1978-03-07 Rank Xerox Ltd. Deactivating device for a magnetic brush developer used in a multicolor electrophotographic copying machine
US4168119A (en) * 1974-12-27 1979-09-18 Canon Kabushiki Kaisha Electrophotographic copying apparatus utilizing liquid developer
FR2419537A1 (fr) * 1978-03-07 1979-10-05 Canon Kk Procede et dispositif de developpement d'images electrostatiques
US4389936A (en) * 1980-11-18 1983-06-28 Precision Screen Machines, Inc. Cleaning attachment for screen printer
US4392742A (en) * 1978-11-09 1983-07-12 Savin Corporation Liquid developer copier cleaning system incorporating resilient closed-cell cleaning roller
EP0086497A1 (de) * 1982-02-16 1983-08-24 Coulter Systems Corporation "Toner"-System für elektrostatischen Kopierer
US4422405A (en) * 1977-11-25 1983-12-27 Ricoh Company, Ltd. Color electrostatographic apparatus
US4449475A (en) * 1981-03-20 1984-05-22 U.S. Philips Corporation Cleaning device for the intermediate image carrier of an electrophoretic printer
WO1985004733A1 (en) * 1984-04-13 1985-10-24 Eastman Kodak Company A cleaning method and apparatus for a polychromatic electrophotographic copier
FR2567287A1 (fr) * 1984-07-06 1986-01-10 Savin Corp Copieur electrophotographique pour reproduction en couleurs differentes
EP0175392A1 (de) * 1984-09-26 1986-03-26 Ishihara Sangyo Kaisha, Ltd. Verfahren zur Farbelektrophotographie
US4602862A (en) * 1984-11-16 1986-07-29 Xerox Corporation Valve for a multi-color development system
US4639124A (en) * 1985-11-07 1987-01-27 Xerox Corporation Cleaning system for a multicolor electrophotographic printing machine
US4799452A (en) * 1987-07-23 1989-01-24 Precision Image Corporation Liquid toner recycling system and method
US4895103A (en) * 1987-07-23 1990-01-23 Precision Image Corporation Automatic cleaning method for image development apparatus
US4911074A (en) * 1988-06-23 1990-03-27 The United States Of America As Represented By The Secretary Of The Air Force Apparatus for automatically cleaning
US4913992A (en) * 1989-05-26 1990-04-03 Eastman Kodak Company Method of improving a multi-color electrophotographic image by buffing an image toned with an improved toner
US4930440A (en) * 1989-07-19 1990-06-05 Chugai Ro Co., Ltd. Coater gap control arrangement
US4956676A (en) * 1987-04-16 1990-09-11 Kentek Information Systems, Inc. Electrographic color printer/copier
WO1990014619A1 (en) * 1989-05-15 1990-11-29 Spectrum Sciences B.V. Color imaging system
US4998142A (en) * 1989-05-26 1991-03-05 Eastman Kodak Company Method of improving a multi-color electrophotographic image
US5016054A (en) * 1989-05-26 1991-05-14 Eastman Kodak Company Apparatus for improving a multi-color electrophotographic image
US5036365A (en) * 1988-11-21 1991-07-30 Benzion Landa Field assisted filter and electrophotographic copying machine using the same
US5047808A (en) * 1989-02-06 1991-09-10 Spectrum Sciences B.V. Image transfer apparatus including a compliant transfer member
US5075731A (en) * 1990-03-13 1991-12-24 Sharp Kabushiki Kaisha Transfer roller device
US5089856A (en) * 1989-02-06 1992-02-18 Spectrum Sciences B.V. Image transfer apparatus incorporating an internal heater
US5148222A (en) * 1990-08-22 1992-09-15 Spectrum Sciences B.V. Liquid developer system
US5220384A (en) * 1988-11-21 1993-06-15 Spectrum Sciences B.V. Liquid developer based imaging machine using a developing electrode
US5231454A (en) * 1989-05-15 1993-07-27 Spectrum Sciences B.V. Charge director replenishment system and method for a liquid toner developing apparatus
DE4206181A1 (de) * 1992-02-28 1993-09-02 Baldwin Gegenheimer Gmbh Vorrichtung zur aufbringung von reinigungsfluessigkeit auf einen zylinder einer rotationsdruckmaschine
US5374980A (en) * 1992-09-25 1994-12-20 Ricoh Company, Ltd. Color image forming apparatus utilizing liquid development
US5477313A (en) * 1992-06-30 1995-12-19 Dai Nippon Printing Co., Ltd. Liquid development and transfer apparatus for electrostatic latent image
US5497222A (en) * 1989-02-06 1996-03-05 Indigo N.V. Image transfer apparatus incorporating an integral heater
US5557376A (en) * 1989-05-15 1996-09-17 Indigo N.V. Color imaging system
US5745829A (en) * 1989-01-04 1998-04-28 Indigo N.V. Imaging apparatus and intermediate transfer blanket therefor
WO1999041645A1 (en) * 1998-02-17 1999-08-19 Imation Corp. Apparatus and method for removal of back-plated developer
US6401619B2 (en) * 2000-02-14 2002-06-11 Oxy-Dry Maschinen Gmbh Method and device for cleaning the guide rollers of a web printing press
CN102553846A (zh) * 2011-12-13 2012-07-11 万向电动汽车有限公司 一种压辊自动清洁装置
US20140150680A1 (en) * 2011-04-29 2014-06-05 Hewlett-Packard Development Company, L.P. Apparatus, printers, and methods to remove material from a printer surface
US9709913B2 (en) 2014-01-15 2017-07-18 Hewlett-Packard Indigo B.V. Concentrating an ink composition
US9709915B2 (en) 2014-01-24 2017-07-18 Hewlett-Parkard Indigo B.V. Electrostatic ink compositions
US9745488B2 (en) 2012-05-31 2017-08-29 Hewlett-Packard Indigo B.V. Electrostatic inks and method for their production
US9785078B2 (en) 2013-10-21 2017-10-10 Hewlett-Packard Indigo B.V. Electrostatic ink compositions
US9874828B2 (en) 2013-10-25 2018-01-23 Hewlett-Packard Indigo B.V. Electrostatic ink compositions
US10042278B2 (en) 2015-04-28 2018-08-07 Hp Indigo B.V. Electrostatic ink compositions
US10114305B2 (en) 2014-09-26 2018-10-30 Hp Indigo B.V. Liquid toner containing a low symmetry electrically conducting material for printing conductive traces
US10344175B2 (en) 2015-07-17 2019-07-09 Hp Indigo B.V. Electrostatic ink compositions
US10642180B2 (en) 2015-07-17 2020-05-05 Hp Indigo B.V. Electrostatic ink compositions
US11815852B2 (en) 2018-04-17 2023-11-14 Hewlett-Packard Development Company, L.P. Liquid electrophotographic ink composition

Families Citing this family (6)

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JPS5518678A (en) * 1978-07-28 1980-02-08 Ricoh Co Ltd Cleaning device
JPS55121265U (de) * 1979-02-21 1980-08-28
JPS565159U (de) * 1979-06-23 1981-01-17
US4577305A (en) * 1983-03-14 1986-03-18 Dolby Laboratories Licensing Corporation Stereophonic motion picture photographic sound-tracks compatible with different sound projection formats and record and playback apparatus therefore
JPH0776851B2 (ja) * 1985-12-18 1995-08-16 石原産業株式会社 湿式カラ−電子写真複写機
JP2764404B2 (ja) * 1988-08-29 1998-06-11 キヤノン株式会社 画像形成装置

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US3776723A (en) * 1972-08-09 1973-12-04 Xerox Corp Improved liquid transfer electrophotographic development process
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US3663100A (en) * 1968-06-07 1972-05-16 Canon Kk Electrophotographic apparatus
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US3705767A (en) * 1969-07-21 1972-12-12 Fuji Photo Film Co Ltd Electrophotographic device
US3719484A (en) * 1971-01-06 1973-03-06 Xerox Corp Photoelectrophoretic imaging method
US3776117A (en) * 1971-02-22 1973-12-04 Ricoh Kk Method and apparatus for developing for diazo type copying machines
US3748146A (en) * 1971-07-15 1973-07-24 Lowa Beef Processors Inc Method for breaking animal carcasses and handling meat products
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Cited By (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4168119A (en) * 1974-12-27 1979-09-18 Canon Kabushiki Kaisha Electrophotographic copying apparatus utilizing liquid developer
US4077358A (en) * 1976-05-17 1978-03-07 Rank Xerox Ltd. Deactivating device for a magnetic brush developer used in a multicolor electrophotographic copying machine
US4422405A (en) * 1977-11-25 1983-12-27 Ricoh Company, Ltd. Color electrostatographic apparatus
FR2419537A1 (fr) * 1978-03-07 1979-10-05 Canon Kk Procede et dispositif de developpement d'images electrostatiques
US4392742A (en) * 1978-11-09 1983-07-12 Savin Corporation Liquid developer copier cleaning system incorporating resilient closed-cell cleaning roller
US4389936A (en) * 1980-11-18 1983-06-28 Precision Screen Machines, Inc. Cleaning attachment for screen printer
US4449475A (en) * 1981-03-20 1984-05-22 U.S. Philips Corporation Cleaning device for the intermediate image carrier of an electrophoretic printer
EP0086497A1 (de) * 1982-02-16 1983-08-24 Coulter Systems Corporation "Toner"-System für elektrostatischen Kopierer
WO1985004733A1 (en) * 1984-04-13 1985-10-24 Eastman Kodak Company A cleaning method and apparatus for a polychromatic electrophotographic copier
US4571071A (en) * 1984-04-13 1986-02-18 Eastman Kodak Company Cleaning apparatus and method for a polychromatic electrophotographic copier
FR2567287A1 (fr) * 1984-07-06 1986-01-10 Savin Corp Copieur electrophotographique pour reproduction en couleurs differentes
US4627705A (en) * 1984-07-06 1986-12-09 Savin Corporation Multiple color liquid developer electrophotographic copying machine and liquid distribution system therefor
EP0175392A1 (de) * 1984-09-26 1986-03-26 Ishihara Sangyo Kaisha, Ltd. Verfahren zur Farbelektrophotographie
US4602862A (en) * 1984-11-16 1986-07-29 Xerox Corporation Valve for a multi-color development system
US4639124A (en) * 1985-11-07 1987-01-27 Xerox Corporation Cleaning system for a multicolor electrophotographic printing machine
US4956676A (en) * 1987-04-16 1990-09-11 Kentek Information Systems, Inc. Electrographic color printer/copier
WO1989001189A1 (en) * 1987-07-23 1989-02-09 Precision Image Corporation Liquid toner recycling system and method
US4895103A (en) * 1987-07-23 1990-01-23 Precision Image Corporation Automatic cleaning method for image development apparatus
US4799452A (en) * 1987-07-23 1989-01-24 Precision Image Corporation Liquid toner recycling system and method
US4911074A (en) * 1988-06-23 1990-03-27 The United States Of America As Represented By The Secretary Of The Air Force Apparatus for automatically cleaning
US5036365A (en) * 1988-11-21 1991-07-30 Benzion Landa Field assisted filter and electrophotographic copying machine using the same
US5220384A (en) * 1988-11-21 1993-06-15 Spectrum Sciences B.V. Liquid developer based imaging machine using a developing electrode
US5745829A (en) * 1989-01-04 1998-04-28 Indigo N.V. Imaging apparatus and intermediate transfer blanket therefor
US5497222A (en) * 1989-02-06 1996-03-05 Indigo N.V. Image transfer apparatus incorporating an integral heater
US5047808A (en) * 1989-02-06 1991-09-10 Spectrum Sciences B.V. Image transfer apparatus including a compliant transfer member
US5089856A (en) * 1989-02-06 1992-02-18 Spectrum Sciences B.V. Image transfer apparatus incorporating an internal heater
WO1990014619A1 (en) * 1989-05-15 1990-11-29 Spectrum Sciences B.V. Color imaging system
US5749032A (en) * 1989-05-15 1998-05-05 Indigo N.V. Color imaging system
US5231454A (en) * 1989-05-15 1993-07-27 Spectrum Sciences B.V. Charge director replenishment system and method for a liquid toner developing apparatus
US5585900A (en) * 1989-05-15 1996-12-17 Indigo N.V. Developer for liquid toner imager
US5557376A (en) * 1989-05-15 1996-09-17 Indigo N.V. Color imaging system
US5016054A (en) * 1989-05-26 1991-05-14 Eastman Kodak Company Apparatus for improving a multi-color electrophotographic image
US4998142A (en) * 1989-05-26 1991-03-05 Eastman Kodak Company Method of improving a multi-color electrophotographic image
US4913992A (en) * 1989-05-26 1990-04-03 Eastman Kodak Company Method of improving a multi-color electrophotographic image by buffing an image toned with an improved toner
US4930440A (en) * 1989-07-19 1990-06-05 Chugai Ro Co., Ltd. Coater gap control arrangement
US5075731A (en) * 1990-03-13 1991-12-24 Sharp Kabushiki Kaisha Transfer roller device
US5148222A (en) * 1990-08-22 1992-09-15 Spectrum Sciences B.V. Liquid developer system
DE4206181A1 (de) * 1992-02-28 1993-09-02 Baldwin Gegenheimer Gmbh Vorrichtung zur aufbringung von reinigungsfluessigkeit auf einen zylinder einer rotationsdruckmaschine
US5477313A (en) * 1992-06-30 1995-12-19 Dai Nippon Printing Co., Ltd. Liquid development and transfer apparatus for electrostatic latent image
US5666614A (en) * 1992-06-30 1997-09-09 Dai Nippon Printing Co., Ltd. Liquid development apparatus for electrostatic latent image using a plurality of electrodes
US6141517A (en) * 1992-06-30 2000-10-31 Dai Nippon Printing Co., Ltd. Liquid development apparatus for developing electrostatic latent images using a plurality of electrodes
US5374980A (en) * 1992-09-25 1994-12-20 Ricoh Company, Ltd. Color image forming apparatus utilizing liquid development
WO1999041645A1 (en) * 1998-02-17 1999-08-19 Imation Corp. Apparatus and method for removal of back-plated developer
US6401619B2 (en) * 2000-02-14 2002-06-11 Oxy-Dry Maschinen Gmbh Method and device for cleaning the guide rollers of a web printing press
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JPS5017844A (de) 1975-02-25
JPS5616424B2 (de) 1981-04-16
GB1476782A (en) 1977-06-16
DE2428734A1 (de) 1975-01-16
AU7011474A (en) 1975-12-18

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