GB940242A - Electrophotography - Google Patents

Electrophotography

Info

Publication number
GB940242A
GB940242A GB32393/59A GB3239359A GB940242A GB 940242 A GB940242 A GB 940242A GB 32393/59 A GB32393/59 A GB 32393/59A GB 3239359 A GB3239359 A GB 3239359A GB 940242 A GB940242 A GB 940242A
Authority
GB
United Kingdom
Prior art keywords
vehicle
developer
droplets
solvent
electrophotographic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB32393/59A
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.)
Harris Corp
Original Assignee
Harris Intertype Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Harris Intertype Corp filed Critical Harris Intertype Corp
Publication of GB940242A publication Critical patent/GB940242A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/12—Developers with toner particles in liquid developer mixtures
    • G03G9/122—Developers with toner particles in liquid developer mixtures characterised by the colouring agents
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/06—Developing
    • G03G13/10—Developing using a liquid developer, e.g. liquid suspension
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G13/00—Electrographic processes using a charge pattern
    • G03G13/26—Electrographic processes using a charge pattern for the production of printing plates for non-xerographic printing processes
    • G03G13/28—Planographic printing plates
    • 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
    • G03G15/108—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer with which the recording material is brought in contact, e.g. immersion or surface immersion development
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
    • G03G5/005—Materials for treating the recording members, e.g. for cleaning, reactivating, polishing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/12—Developers with toner particles in liquid developer mixtures
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/08—Developers with toner particles
    • G03G9/12—Developers with toner particles in liquid developer mixtures
    • G03G9/135—Developers with toner particles in liquid developer mixtures characterised by stabiliser or charge-controlling agents
    • G03G9/1355—Ionic, organic compounds

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Liquid Developers In Electrophotography (AREA)
  • Wet Developing In Electrophotography (AREA)

Abstract

940,242. Electrophotography. HARRIS - INTERTYPE CORPORATION. Sept. 23, 1959 [Sept. 23, 1958 (2)], No. 32393/59. Drawings to Specification. Heading G2H. A liquid developer for an electrophotographic charge image comprises a substantially non- conducting liquid vehicle having dispersed therein finely divided droplets of a solution and/or dispersion of a developer agent which is substantially insoluble in the liquid vehicle, the droplets themselves being substantially insoluble in the vehicle and bearing an electric charge. The vehicle may be of gasoline, carbon tetrachloride, kerosene or preferably the petroleum derivative sold under the trade name Varnolene. The developer droplets may be of a solution of a resin such as an epoxy resin dissolved in mesityl oxide or isopropenyl acetate, a vinyl chloride-vinylidene chloride copolymer dissolved in mesityl oxide, polyisopropenyl acetate dissolved in isopropenyl acetate and a dye or pigment e. g. a magnetic oxide may be included in the resin droplets. Developer droplets comprising a red gravure ink dispersed in varnolene may also be used. Fixing may be effected by heating or after evaporation of the vehicle by treatment of the plate carrying the developed image with a solvent for the electrophotographic layer to soften it, or in some cases depending on the electrophotographic layer the solvent of the developer droplets may effect fixing. The charge formed on the droplets depends on the vehicle-droplet solvent relationship. With a varnolene vehicle an expoxy resin in isopropenyl acetate gives positively charged drops while the vinyl-vinylidene chloride polymer in mesityl oxide gives negatively charged drops. Development may be effected by means of a magnetic brush loaded with or immersed in the developer and this brush also serves as a counter electrode. Apparatus is described (see Figs. 8 and 9 not shown) in which a web of electrophotographic material is fed through a combined printer (contact or projection) and magnetic brush developer unit to a drying drum where the vehicle and solvent from the liquid developer is recovered. The feeding may be continuous or intermittent and web feed metering and operating control devices are also provided. Specification 888, 371 is referred to.
GB32393/59A 1958-09-23 1959-09-23 Electrophotography Expired GB940242A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US762756A US3311490A (en) 1958-09-23 1958-09-23 Developing electrostatic charge image with a liquid developer of two immiscible phases
US762699A US3155531A (en) 1958-09-23 1958-09-23 Meagnetic liquid developer and method for electrostatic images

Publications (1)

Publication Number Publication Date
GB940242A true GB940242A (en) 1963-10-30

Family

ID=27117175

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32393/59A Expired GB940242A (en) 1958-09-23 1959-09-23 Electrophotography

Country Status (3)

Country Link
US (2) US3311490A (en)
DE (3) DE1497154A1 (en)
GB (1) GB940242A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3311490A (en) * 1958-09-23 1967-03-28 Harris Intertype Corp Developing electrostatic charge image with a liquid developer of two immiscible phases
US3365324A (en) * 1963-03-18 1968-01-23 Bernice B Blake Solution development of xerographic latent images
US3406061A (en) * 1963-12-13 1968-10-15 Commw Of Australis Method of conditioning photoconductor surfaces
US3462285A (en) * 1964-11-02 1969-08-19 Phillips Petroleum Co Electromagnetic fusion of thermoplastic printing
DE1497190B2 (en) * 1965-10-23 1975-03-06 Philips Patentverwaltung Gmbh, 2000 Hamburg Electrostatic image development process using liquids
US3440160A (en) * 1966-02-09 1969-04-22 Pitney Bowes Inc Method and apparatus for controlling suspension concentrations
GB1219443A (en) * 1967-07-01 1971-01-13 Fuji Photo Film Co Ltd A reversal development process for electrophotography
US3788738A (en) * 1968-08-15 1974-01-29 Dainippon Printing Co Ltd Method for recording a visible image on a substrate by using an electroconductive toner
DE1935615A1 (en) * 1969-07-14 1971-02-11 Canon Kk Container filled with a developer liquid
US3963487A (en) * 1970-12-14 1976-06-15 Fuji Photo Film Co., Ltd. Electrophotographic process using separate photoconductive elements
US3816114A (en) * 1972-03-03 1974-06-11 Xerox Corp Electro-photographic method
US3877963A (en) * 1973-01-10 1975-04-15 Masamichi Sato Reversal liquid developing using a development electrode and corona charging
US3974769A (en) * 1975-05-27 1976-08-17 International Business Machines Corporation Method and apparatus for recording information on a recording surface through the use of mists
US4105572A (en) * 1976-03-31 1978-08-08 E. I. Du Pont De Nemours And Company Ferromagnetic toner containing water-soluble or water-solubilizable resin(s)
EP0120848B1 (en) * 1982-09-30 1988-05-11 Ford Motor Company Limited Color change apparatus

Family Cites Families (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US786946A (en) * 1903-10-17 1905-04-11 Erastus S Bennett Means for recovering magnetic iron from ore-separating tanks.
GB431531A (en) * 1934-02-10 1935-07-10 Wilfrid Bayley Pirie Improvements in or relating to processes and apparatus for surfacing sheet material with pigments, varnishes, lacquers, waterproofing solutions or the like
US2267999A (en) * 1939-03-20 1941-12-30 Robert C Switzer Magnetic testing
US2297691A (en) * 1939-04-04 1942-10-06 Chester F Carlson Electrophotography
NL146059B (en) * 1948-05-01 Keyes Fibre Co PROCEDURE FOR MANUFACTURING INTERCHANGEABLE FILTER UNITS FOR GAS FILTERS AND FILTER UNITS MADE IN ACCORDANCE WITH THIS PROCESS.
US2618551A (en) * 1948-10-20 1952-11-18 Haloid Co Developer for electrostatic images
US2573881A (en) * 1948-11-02 1951-11-06 Battelle Development Corp Method and apparatus for developing electrostatic images with electroscopic powder
US2703280A (en) * 1950-05-17 1955-03-01 Western Electric Co Counting circuit control for electrophotographic printers
NL88348C (en) * 1951-08-23
US2811465A (en) * 1952-04-30 1957-10-29 Rca Corp Electrostatic printing
US2776907A (en) * 1952-07-18 1957-01-08 Battelle Development Corp Method of fixing electrostatic powder image
NL174651B (en) * 1952-07-26 Rhone Poulenc Textile METHOD FOR PREPARING ANTISTATIC COMPOUNDS BASED ON POLYESTERS.
US2753308A (en) * 1952-12-22 1956-07-03 Haloid Co Xerography developer composition
US2914996A (en) * 1953-06-03 1959-12-01 Sprague Electric Co Electrostatic unit for producing printed circuits
US2786439A (en) * 1953-06-30 1957-03-26 Rca Corp Electrophotographic developing apparatus
US2854947A (en) * 1953-07-01 1958-10-07 Rca Corp Electrostatic printing
GB755486A (en) * 1953-09-15 1956-08-22 Horizons Inc Improvements in electrostatic printing
FR1112180A (en) * 1953-09-15 1956-03-09 Horizons Electrostatic printing method and device
US2862815A (en) * 1953-10-01 1958-12-02 Rca Corp Electrophotographic member
US2803177A (en) * 1953-12-31 1957-08-20 Ibm Apparatus and method for xerographic printing
DE1016722B (en) * 1954-01-26 1957-10-03 Horizons Inc Method and device for the reproduction of characters and images generated electrostatically on a non-conductive layer
US2857271A (en) * 1954-09-28 1958-10-21 Rca Corp Electrostatic printing process for producing photographic transparencies
DE1017911B (en) * 1954-10-26 1957-10-17 Rca Corp Material and process for electrostatic imaging and a device for performing the process
US3052564A (en) * 1954-12-20 1962-09-04 Ibm Printing with magnetic ink
DE1022092B (en) * 1955-01-26 1958-01-02 Gen Dynamics Corp Xerographic process and device for producing a visible representation of a visible object
US3043684A (en) * 1955-01-26 1962-07-10 Gen Dynamics Corp Electrostatic printing
US2824545A (en) * 1955-02-01 1958-02-25 Haloid Co Apparatus for developing xerographic images
US2913353A (en) * 1955-02-08 1959-11-17 Gen Dynamics Corp Method and apparatus for developing electrostatic image
US2784694A (en) * 1955-02-08 1957-03-12 Haloid Co Segmented development electrode
US2890968A (en) * 1955-06-02 1959-06-16 Rca Corp Electrostatic printing process and developer composition therefor
US2891911A (en) * 1955-06-06 1959-06-23 Gen Dynamics Corp Developer for electrostatic printing
NL207692A (en) * 1955-06-27
US3010842A (en) * 1955-08-29 1961-11-28 Xerox Corp Development of electrostatic images
US2884704A (en) * 1955-09-08 1959-05-05 Ibm Apparatus for fixing electrographic printer images
DE1065433B (en) * 1955-09-21
US2846333A (en) * 1955-11-01 1958-08-05 Haloid Xerox Inc Method of developing electrostatic images
NL95463C (en) * 1955-12-29
US2880696A (en) * 1956-05-02 1959-04-07 Haloid Xerox Inc Apparatus for developing an electrostatic latent image
US2851988A (en) * 1956-06-01 1958-09-16 Rca Corp Electrostatic printing
BE558297A (en) * 1956-06-14
US2877133A (en) * 1956-10-22 1959-03-10 Gen Dynamics Corp Electrostatic photography
US2899335A (en) * 1956-10-31 1959-08-11 Process for developing electrostatic
DE1036279B (en) * 1957-01-19 1958-08-14 Haloid Co Method for transmitting xerographic images
US2940847A (en) * 1957-07-03 1960-06-14 None i red
GB902928A (en) * 1957-09-25 1962-08-09 Commw Of Australia Method of developing an electrostatic image and a developer for use in the method
US3311490A (en) * 1958-09-23 1967-03-28 Harris Intertype Corp Developing electrostatic charge image with a liquid developer of two immiscible phases
NL279524A (en) * 1961-06-08

Also Published As

Publication number Publication date
US3311490A (en) 1967-03-28
DE1497148A1 (en) 1969-06-26
US3155531A (en) 1964-11-03
DE1497154A1 (en) 1969-05-08
DE1222797B (en) 1969-05-08

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