GB994645A - A process and apparatus for electrophotographic development - Google Patents

A process and apparatus for electrophotographic development

Info

Publication number
GB994645A
GB994645A GB15548/62A GB1554862A GB994645A GB 994645 A GB994645 A GB 994645A GB 15548/62 A GB15548/62 A GB 15548/62A GB 1554862 A GB1554862 A GB 1554862A GB 994645 A GB994645 A GB 994645A
Authority
GB
United Kingdom
Prior art keywords
mms
paper
filaments
grid
dyestuff
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
GB15548/62A
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.)
Bayer AG
Original Assignee
Bayer AG
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 Bayer AG filed Critical Bayer AG
Publication of GB994645A publication Critical patent/GB994645A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D5/00—Liquid processing apparatus in which no immersion is effected; Washing apparatus in which no immersion is effected
    • G03D5/04—Liquid processing apparatus in which no immersion is effected; Washing apparatus in which no immersion is effected using liquid sprays
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D7/00—Gas processing apparatus
    • 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
    • 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
    • G03G15/101—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer for wetting the recording material
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G9/00—Developers
    • G03G9/16—Developers not provided for in groups G03G9/06 - G03G9/135, e.g. solutions, aerosols

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Wet Developing In Electrophotography (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)
  • Liquid Developers In Electrophotography (AREA)

Abstract

994,645. Coating apparatus ; spray producers. FARBENFABRIKEN BAYER A.G. April 24, 1962 [April 26, 1961 ; March 8, 1962], No. 15548/62. Headings B2B and B2F. [Also in Division G2] In the development of latent electrophotographic charge or conductivity images (see Division G2) by electrostatic spraying, an electrically charged liquid aerosol is formed by atomizing and simultaneously charging a solution or dispersion of a dyestuff in a liquid having a resistivity of 10<SP>3</SP> to 10<SP>8</SP> ohm-cms. by the action of a strong non-uniform electric field, at least one of the atomizing electrodes comprising filaments, bristles or electrodes having sharp edges. As shown in Fig. 1, a charged and exposed zinc oxide-in-resin coated paper 1 on an earthed support 2 is developed by means of one or more endless synthetic plastic filaments 3 looped around conductive driving rollers 4 connected to a high potential, a pad 5 impregnated with a dyestuff solution supplying the filaments which atomize the solution. The filaments may be replaced (Fig. 2, not shown) by a conductive band carrying at right angles to its plane non-conductive bristles e.g. of nylon, which pass through a container for the developing liquid. Alternatively, Figs. 3 and 4, a hollow metal atomizing electrode 11 which is connected via a pump to the dyestuff liquid reservoir 19 and is connected to a source of positive potential of 10-40 KV may be fixed vertically in a holder 14 so as to be at a height of 20-200 mms. and arranged to sweep over a grid electrode 12 at a variable potential between -1 KV and +500 V parallel to and spaced by from 1-20 mms. from the exposed photoconductive paper on an earthed metal plate 24, the paper being withdrawn from a reel 27 by guide rollers 28 and a knife 26 being provided for cutting off the finished prints. An absorbent pad 23 against which the grid 12 may be swung about pivot 22 is provided for cleaning the grid of adherent dye. The electrode and spray nozzle 11 comprises a cylinder 13 of length a of 20-100 mms., outer and inner diameter b, c of 1-3 mms. and 0À3-2 mms. respectively and a funnelled end 15 having a sharp rim of diameter d of 1-10 mms. with an opening angle α of 20-100 degrees. When the grid 12 is raised movable corona discharge needles 29, Fig. 5 (not shown), may be brought adjacent the paper to place an electrostatic charge on the paper for formation of a charge pattern on exposure to a light image. Specifications 834,502, 874,133, 883,783, 896,610, 901,449 and 932,885 are referred to.
GB15548/62A 1961-04-26 1962-04-24 A process and apparatus for electrophotographic development Expired GB994645A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEF33767A DE1164829B (en) 1961-04-26 1961-04-26 Process for the electrophotographic production of images with liquid aerosols
DEF36217A DE1172955B (en) 1961-04-26 1962-03-08 Electrophotographic developing device
DEF37187A DE1187134B (en) 1961-04-26 1962-06-29 Electrophotographic developing device
DEF38613A DE1202639B (en) 1961-04-26 1962-12-20 Electrostatic atomizing device for liquids

Publications (1)

Publication Number Publication Date
GB994645A true GB994645A (en) 1965-06-10

Family

ID=27436890

Family Applications (2)

Application Number Title Priority Date Filing Date
GB15548/62A Expired GB994645A (en) 1961-04-26 1962-04-24 A process and apparatus for electrophotographic development
GB25853/63A Expired GB1016587A (en) 1961-04-26 1963-06-28 Electrophotographic developer apparatus

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB25853/63A Expired GB1016587A (en) 1961-04-26 1963-06-28 Electrophotographic developer apparatus

Country Status (6)

Country Link
US (2) US3228608A (en)
BE (2) BE634184A (en)
CH (2) CH430456A (en)
DE (4) DE1164829B (en)
GB (2) GB994645A (en)
NL (1) NL294688A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3608821A (en) * 1965-10-15 1971-09-28 Agfa Gevaert Ag Electrostatic atomization of liquids
WO1995010800A1 (en) * 1993-10-14 1995-04-20 Research Laboratories Of Australia Pty Ltd. A method and apparatus for developing electrostatic images
AU677447B2 (en) * 1993-10-14 1997-04-24 Watermark Imaging Ltd A method and apparatus for developing electrostatic images

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1241264B (en) * 1964-04-07 1967-05-24 Bayer Ag Apparatus for the electrophotographic development of charge images
US3417734A (en) * 1964-04-07 1968-12-24 Bayer Ag Apparatus for developing a latent electrostatic image with a liquid aerosol
DE1497117A1 (en) * 1965-05-21 1969-05-08 Agfa Gevaert Ag Electrophotographic development process for color images
US3442585A (en) * 1965-10-23 1969-05-06 Bell & Howell Co Continuous rotary electrostatographic apparatus
DE1577628A1 (en) * 1966-03-18 1970-03-05 Agfa Gevaert Ag Device for the electrostatic atomization of liquids
US3862849A (en) * 1967-12-05 1975-01-28 Ricoh Kk Method for preparation of developing solution for developing electrostatic latent images
JPS5122821B1 (en) * 1970-12-10 1976-07-13
US4047185A (en) * 1976-04-02 1977-09-06 Sperry Rand Corporation Multi-jet ink printer using star-wheel jet formers
CH668646A5 (en) * 1983-05-31 1989-01-13 Contraves Ag DEVICE FOR RECOVERING LIQUID VOLUME.
CN102704194A (en) * 2012-06-25 2012-10-03 天津工业大学 Non-woven cloth production device for curtain solid pin electrode nano fiber
HUE061382T2 (en) 2014-08-22 2023-06-28 Celgene Corp Methods of treating multiple myeloma with immunomodulatory compounds in combination with antibodies
US9993839B2 (en) 2016-01-18 2018-06-12 Palo Alto Research Center Incorporated System and method for coating a substrate
US10500784B2 (en) 2016-01-20 2019-12-10 Palo Alto Research Center Incorporated Additive deposition system and method
US10434703B2 (en) * 2016-01-20 2019-10-08 Palo Alto Research Center Incorporated Additive deposition system and method
US10493483B2 (en) 2017-07-17 2019-12-03 Palo Alto Research Center Incorporated Central fed roller for filament extension atomizer
US10919215B2 (en) 2017-08-22 2021-02-16 Palo Alto Research Center Incorporated Electrostatic polymer aerosol deposition and fusing of solid particles for three-dimensional printing

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1958406A (en) * 1926-12-27 1934-05-15 William A Darrah Electrical spraying device
US2334679A (en) * 1939-09-14 1943-11-16 Foxboro Co Flow control of fuel
US2374041A (en) * 1942-01-31 1945-04-17 Gen Furnaces Corp Variable capacity atomizing device
US2808328A (en) * 1950-07-15 1957-10-01 Carlyle W Jacob Method and apparatus for xerographic reproduction
US2784109A (en) * 1950-09-18 1957-03-05 Haloid Co Method for developing electrostatic images
US2764712A (en) * 1951-05-31 1956-09-25 Ransburg Electro Coating Corp Apparatus for electrostatically atomizing liquid
US2728607A (en) * 1954-05-24 1955-12-27 Ransburg Electro Coating Corp Liquid feeding apparatus
US3010842A (en) * 1955-08-29 1961-11-28 Xerox Corp Development of electrostatic images
US2965482A (en) * 1955-09-08 1960-12-20 Haloid Zerox Inc Method for fixing xerographic images
US3021077A (en) * 1956-03-20 1962-02-13 Ransburg Electro Coating Corp Electrostatic coating apparatus
DE1139058B (en) * 1956-03-27 1962-10-31 Ford Werke Ag Device for the electrostatic application of liquids
BE561403A (en) * 1956-03-30
US3005726A (en) * 1958-05-01 1961-10-24 Xerox Corp Process of developing electrostatic images
NL239226A (en) * 1958-05-16
US2979026A (en) * 1958-06-19 1961-04-11 Rca Corp Film viewer and reproducer
US3052213A (en) * 1958-12-17 1962-09-04 Ibm Electrostatic printer apparatus for printing with liquid ink
US3039700A (en) * 1959-02-09 1962-06-19 Ricardo & Co Engineers Liquid-metering device
DE1302344B (en) * 1961-02-06

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3608821A (en) * 1965-10-15 1971-09-28 Agfa Gevaert Ag Electrostatic atomization of liquids
US5752142A (en) * 1993-10-13 1998-05-12 Watermark Imaging Ltd. Method and apparatus for developing electrostatic images
WO1995010800A1 (en) * 1993-10-14 1995-04-20 Research Laboratories Of Australia Pty Ltd. A method and apparatus for developing electrostatic images
AU677447B2 (en) * 1993-10-14 1997-04-24 Watermark Imaging Ltd A method and apparatus for developing electrostatic images

Also Published As

Publication number Publication date
BE634184A (en)
DE1187134B (en) 1965-02-11
DE1202639B (en) 1965-10-07
NL294688A (en)
US3228608A (en) 1966-01-11
CH465408A (en) 1968-11-15
GB1016587A (en) 1966-01-12
DE1172955B (en) 1964-06-25
CH430456A (en) 1967-02-15
DE1164829B (en) 1964-03-05
BE616914A (en)
US3330683A (en) 1967-07-11

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