CH573131A5 - Electrographic printing system using apertured screen - Google Patents

Electrographic printing system using apertured screen

Info

Publication number
CH573131A5
CH573131A5 CH1033672A CH1033672A CH573131A5 CH 573131 A5 CH573131 A5 CH 573131A5 CH 1033672 A CH1033672 A CH 1033672A CH 1033672 A CH1033672 A CH 1033672A CH 573131 A5 CH573131 A5 CH 573131A5
Authority
CH
Switzerland
Prior art keywords
screen
apertures
image
printing system
charged particles
Prior art date
Application number
CH1033672A
Original Assignee
Electroprint 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
Priority claimed from US00167005A external-priority patent/US3809556A/en
Application filed by Electroprint Inc filed Critical Electroprint Inc
Publication of CH573131A5 publication Critical patent/CH573131A5/en

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
    • G03G15/05—Apparatus for electrographic processes using a charge pattern for imagewise charging, e.g. photoconductive control screen, optically activated charging means
    • G03G15/051—Apparatus for electrographic processes using a charge pattern for imagewise charging, e.g. photoconductive control screen, optically activated charging means by modulating an ion flow through a photoconductive screen onto which a charge image has been formed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/12—Stencil printing; Silk-screen printing
    • B41M1/125—Stencil printing; Silk-screen printing using a field of force, e.g. an electrostatic field, or an electric current
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photoreceptors In Electrophotography (AREA)

Abstract

The screen has an array of apertures and is made from an electrically insulating and/or photo-conductive material provided with a conductive layer with the image to be printed provided on the screen as an electrostatic charge image of opposing polarities. An electric field of such intensity and polarity is provided via the apertures in the screen, so that under the effect of an electrical acceleration field in the direction of the screen, the charged particles block some of the screen apertures, while other apertures are enlarged, so that charged particles at the rear of the screen adopt the configuration of the required image. The electric field through the screen apertures may be provided by providing both sides of the screen with a similar charge pattern.
CH1033672A 1971-07-28 1972-07-10 Electrographic printing system using apertured screen CH573131A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00167005A US3809556A (en) 1968-11-15 1971-07-28 Method of aperture controlled electrostatic image reproduction or constitution

Publications (1)

Publication Number Publication Date
CH573131A5 true CH573131A5 (en) 1976-02-27

Family

ID=22605557

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1033672A CH573131A5 (en) 1971-07-28 1972-07-10 Electrographic printing system using apertured screen

Country Status (3)

Country Link
CH (1) CH573131A5 (en)
IT (1) IT965941B (en)
NL (1) NL7206209A (en)

Also Published As

Publication number Publication date
IT965941B (en) 1974-02-11
NL7206209A (en) 1973-01-30

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Legal Events

Date Code Title Description
PFA Name/firm changed

Owner name: MARKEM CORPORATION

PL Patent ceased