GB1214217A - Electrophotographic charging device - Google Patents

Electrophotographic charging device

Info

Publication number
GB1214217A
GB1214217A GB3356368A GB3356368A GB1214217A GB 1214217 A GB1214217 A GB 1214217A GB 3356368 A GB3356368 A GB 3356368A GB 3356368 A GB3356368 A GB 3356368A GB 1214217 A GB1214217 A GB 1214217A
Authority
GB
United Kingdom
Prior art keywords
layer
endless
charging device
drum
corona discharge
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
GB3356368A
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.)
Xerox Ltd
Original Assignee
Rank Xerox Ltd
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 Rank Xerox Ltd filed Critical Rank Xerox Ltd
Publication of GB1214217A publication Critical patent/GB1214217A/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
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0208—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus
    • G03G15/0216—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus by bringing a charging member into contact with the member to be charged, e.g. roller, brush chargers
    • 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
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0291—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device

Abstract

1,214,217. Electrostatic charging device. RANK XEROX Ltd. July 15, 1968 [July 19, 1967], No.33563/68. Heading G2H. An electrostatic charging device comprises an endless insulating layer of a material insensitive to light emitted by a corona discharge and a mechanism to transfer by contact the charge, produced by the said corona discharge, from the surface of the endless insulative layer to a photo-conductive layer in a position not reached by light from the discharge. In a first embodiment fig.1 the endless insulative layer 12 is formed on the surface of an earthed, metallic drum 11 driven by a motor. The layer 12 is charged by a corona discharge device 2 comprising a fine wire electrode 21 and an earthed metal case 22. Photo-sensitive paper 4 is fed through the apparatus between the drum 11 and a pressure roller 3. In another embodiment Fig. 2 (not shown) an endless belt (1) passing over two revolving rollers and having an insulating layer (12) on a conducting layer (14) performs a similar action to the drum and the pressure rollers (3, 3<SP>1</SP>) are electrically biassed to assist charge transfer.
GB3356368A 1967-07-19 1968-07-15 Electrophotographic charging device Expired GB1214217A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4649967 1967-07-19

Publications (1)

Publication Number Publication Date
GB1214217A true GB1214217A (en) 1970-12-02

Family

ID=12748914

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3356368A Expired GB1214217A (en) 1967-07-19 1968-07-15 Electrophotographic charging device

Country Status (2)

Country Link
GB (1) GB1214217A (en)
NL (1) NL6809730A (en)

Also Published As

Publication number Publication date
NL6809730A (en) 1969-01-21

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee