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GB1242719A - Aperture controlled electrostatic printing system and method - Google Patents

Aperture controlled electrostatic printing system and method

Info

Publication number
GB1242719A
GB1242719A GB45571/68A GB4557168A GB1242719A GB 1242719 A GB1242719 A GB 1242719A GB 45571/68 A GB45571/68 A GB 45571/68A GB 4557168 A GB4557168 A GB 4557168A GB 1242719 A GB1242719 A GB 1242719A
Authority
GB
United Kingdom
Prior art keywords
screen
layer
charged
charge
image
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
GB45571/68A
Inventor
Gerald L Pressman
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.)
Electroprint Inc
ELECTRO PRINT Inc
Original Assignee
Electroprint Inc
ELECTRO PRINT Inc
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 Electroprint Inc, ELECTRO PRINT Inc filed Critical Electroprint Inc
Publication of GB1242719A publication Critical patent/GB1242719A/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
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/34—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the powder image is formed directly on the recording material, e.g. by using a liquid toner
    • 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
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/34—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the powder image is formed directly on the recording material, e.g. by using a liquid toner
    • G03G15/344—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the powder image is formed directly on the recording material, e.g. by using a liquid toner by selectively transferring the powder to the recording medium, e.g. by using a LED array
    • G03G15/346—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which the powder image is formed directly on the recording material, e.g. by using a liquid toner by selectively transferring the powder to the recording medium, e.g. by using a LED array by modulating the powder through holes or a slit
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2217/00—Details of electrographic processes using patterns other than charge patterns
    • G03G2217/0008—Process where toner image is produced by controlling which part of the toner should move to the image- carrying member
    • G03G2217/0025—Process where toner image is produced by controlling which part of the toner should move to the image- carrying member where the toner starts moving from behind the electrode array, e.g. a mask of holes
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Abstract

1,242,719. Electrostatic printing; stencils. ELECTROPRINT Inc. 25 Sept., 1968 [6 Oct., 1967], No. 45571/68. Heading B6C. [Also in Division G2] An apparatus for electrostatic printing employs a two-layer composite screen on which an electrostatic charge image is formed so as to area-modulate a flow of charged toner particles. The composite screen comprises an apertured layer of insulative material in contact with an apertured layer of conductive material the apertures in the two layers coinciding. Preferably the insulative layer is photoconductive so that the charge image may be formed optically. A layer of induced charge is formed at the junction of the layers of the opposite polarity to an imagewise charge on the surface of the insulative material so that at a distance of more than a few screen thicknesses away from the screen, the resultant field is near zero allowing charged toner particles to pass through the screen in non-charged areas uninfluenced by the charged areas, while in the fully charged areas the particles fall on to the screen. The areas with reduced charge effectively limit the apertures of the screen, Fig. 9 (not shown). In a printing apparatus a continuous screen 121 comprising a photoconductive layer passes over rollers 122- 125. The screen is image-wise charged at station 130 then moves to a toner transfer station 140 where a toner agitating device 143 and an electric field produced by roller electrode 150 propel the toner particles towards the screen, those emerging falling on to a copy sheet 145 on which the image is fused by a heater 157.
GB45571/68A 1967-10-06 1968-09-25 Aperture controlled electrostatic printing system and method Expired GB1242719A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US67349967A 1967-10-06 1967-10-06

Publications (1)

Publication Number Publication Date
GB1242719A true GB1242719A (en) 1971-08-11

Family

ID=24702902

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45571/68A Expired GB1242719A (en) 1967-10-06 1968-09-25 Aperture controlled electrostatic printing system and method

Country Status (4)

Country Link
US (1) US3625604A (en)
CA (1) CA919245A (en)
DE (1) DE1801356C3 (en)
GB (1) GB1242719A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4832534A (en) * 1971-08-27 1973-04-28

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3839027A (en) * 1967-10-06 1974-10-01 Electroprint Inc Aperture controlled electrostatic printing system and method
US3787876A (en) * 1968-11-15 1974-01-22 Electroprint Inc Aperture controlled electrostatic image reproduction
US3977323A (en) * 1971-12-17 1976-08-31 Electroprint, Inc. Electrostatic printing system and method using ions and liquid aerosol toners
FR2165100A5 (en) * 1969-10-06 1973-08-03 Electroprint Inc
US3779166A (en) * 1970-12-28 1973-12-18 Electroprint Inc Electrostatic printing system and method using ions and toner particles
US3730623A (en) * 1970-12-29 1973-05-01 Xerox Corp Vacuum holddown device for moving belts
FR2126855A5 (en) * 1971-02-12 1972-10-06 Res Dev Lab
US3898085A (en) * 1971-08-03 1975-08-05 Electroprint Inc Screen drum with screen tension adjustable axially and circumferentially
CH548866A (en) * 1971-11-17 1974-05-15 Battelle Memorial Institute PRINTING DEVICE WITH LIQUID INK, CONDUCTING ELECTRICITY.
US4027967A (en) * 1972-02-07 1977-06-07 Hoechst Aktiengesellschaft Apparatus for connecting a moving photoconductive web with a fixed electric potential
US4006983A (en) * 1973-10-29 1977-02-08 Electroprint, Inc. Electrostatic color printing systems using modulated ion streams
JPS5419260B2 (en) * 1973-12-10 1979-07-13
US3986871A (en) * 1973-12-12 1976-10-19 Addressograph-Multigraph Corporation Charged particle modulator device and improved imaging methods for use thereof
US3970452A (en) * 1974-08-30 1976-07-20 Addressograph Multigraph Corporation Charged particle modulator device and imaging methods
US4117778A (en) * 1974-10-30 1978-10-03 Oki Electric Industry Co., Ltd. High speed printer with arc preventing fluorocarbon gas
US4026700A (en) * 1975-02-24 1977-05-31 Addressograph Multigraph Corporation Charged particle modulator device and improved imaging methods for use thereof
JP2520500B2 (en) * 1990-05-30 1996-07-31 三田工業株式会社 Image forming device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3339469A (en) * 1962-08-06 1967-09-05 Sun Chemical Corp Electrostatic printing apparatus
US3277818A (en) * 1964-12-28 1966-10-11 Gen Micro Electronics Inc Electrostatic stencil apparatus for matrix printers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4832534A (en) * 1971-08-27 1973-04-28

Also Published As

Publication number Publication date
DE1801356C3 (en) 1978-07-06
DE1801356B2 (en) 1977-11-10
US3625604A (en) 1971-12-07
DE1801356A1 (en) 1969-04-30
CA919245A (en) 1973-01-16

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