GB1474452A - Electrostatic printing machine with self-cleaning corona genera ting device - Google Patents

Electrostatic printing machine with self-cleaning corona genera ting device

Info

Publication number
GB1474452A
GB1474452A GB4052574A GB4052574A GB1474452A GB 1474452 A GB1474452 A GB 1474452A GB 4052574 A GB4052574 A GB 4052574A GB 4052574 A GB4052574 A GB 4052574A GB 1474452 A GB1474452 A GB 1474452A
Authority
GB
United Kingdom
Prior art keywords
corona
follower
machine
pad
switch
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
GB4052574A
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 Corp
Original Assignee
Xerox 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 Xerox Corp filed Critical Xerox Corp
Publication of GB1474452A publication Critical patent/GB1474452A/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
    • G03G15/0258—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices provided with means for the maintenance of the charging apparatus, e.g. cleaning devices, ozone removing devices G03G15/0225, G03G15/0291 takes precedence
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Physics & Mathematics (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Abstract

1474452 Corona charging apparatus XEROX CORP 17 Sept 1974 [24 Sept 1973] 40525/74 Heading H1X A corona generating device comprises a corona wire 46, a generally U-shaped shield 44 around the corona wire, a cleaning pad 48 in contact with the corona wire and adapted to be moved along the wire to clean the same, and means responsive to an electical input signal for moving the pad along the corona wire. As shown the said means comprise an electric motor 52 driving a double helixs crew 54 carrying a follower 56 connected to the pad 48 which also cleans the inner surface 50 of the shield 44. Three of the corona devices are incorporated in an electorstatic printing machine (Fig. 1, not shown). When the follower 56 is at the left-hand end of the screw 54 it engages a roller 58 to open a switch 60. On the occurrence of a predetermined machine event, e.g. the end of a copy run, a signal from the machine logic 62 actuates a machine memory timeout 64 to effect various shutdown operations within the machine and also operates a relay 66 to close a switch 51 and start the motor 52. The follower 56 moves from the end position to close switch 60 so that the motor is driven until the follower again opens switch 60 at the end of a cleaning cycle which may comprise one or several double traverses by the pad 48.
GB4052574A 1973-09-24 1974-09-17 Electrostatic printing machine with self-cleaning corona genera ting device Expired GB1474452A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US400077A US3870883A (en) 1973-09-24 1973-09-24 Electrostatic printing machine with self-cleaning coronal generating device

Publications (1)

Publication Number Publication Date
GB1474452A true GB1474452A (en) 1977-05-25

Family

ID=23582142

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4052574A Expired GB1474452A (en) 1973-09-24 1974-09-17 Electrostatic printing machine with self-cleaning corona genera ting device

Country Status (2)

Country Link
US (1) US3870883A (en)
GB (1) GB1474452A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4073587A (en) * 1975-10-24 1978-02-14 Rank Xerox Ltd. Corotron apparatus
US4038546A (en) * 1976-05-03 1977-07-26 Xerox Corporation Cleaning apparatus for a corona generating device
JPS58135752U (en) * 1982-03-05 1983-09-12 ティーディーケイ株式会社 Charging device for electrostatic copying machines
US4566777A (en) * 1982-08-23 1986-01-28 Canon Kabushiki Kaisha Process kit for image forming apparatus
US4885466A (en) * 1987-09-25 1989-12-05 Ricoh Company, Ltd. Corona wire cleaning device utilizing a position detection system
JP2577409B2 (en) * 1987-11-30 1997-01-29 株式会社東芝 Electronic copier
US5012093A (en) * 1988-08-29 1991-04-30 Minolta Camera Co., Ltd. Cleaning device for wire electrode of corona discharger
JP2974842B2 (en) * 1992-01-23 1999-11-10 シャープ株式会社 Process control stabilizer
US5485255A (en) * 1994-08-31 1996-01-16 Eastman Kodak Company Automatic cleaning mechanism for a corona charger using cleaning pad
JP3361071B2 (en) * 1999-02-04 2003-01-07 富士通株式会社 Automatic charging device cleaning method and image forming apparatus
US7583911B2 (en) * 2007-02-20 2009-09-01 Xerox Corporation Corona charging device cleaning apparatus and method of cleaning a corona charging device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2791949A (en) * 1956-02-01 1957-05-14 Haloid Co Xerographic copying device
US3496352A (en) * 1967-06-05 1970-02-17 Xerox Corp Self-cleaning corona generating apparatus

Also Published As

Publication number Publication date
US3870883A (en) 1975-03-11

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee