GB1533311A - Electrostatographic diagnostics system - Google Patents

Electrostatographic diagnostics system

Info

Publication number
GB1533311A
GB1533311A GB1702976A GB1702976A GB1533311A GB 1533311 A GB1533311 A GB 1533311A GB 1702976 A GB1702976 A GB 1702976A GB 1702976 A GB1702976 A GB 1702976A GB 1533311 A GB1533311 A GB 1533311A
Authority
GB
United Kingdom
Prior art keywords
current
corona
generator
independently
imaging surface
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
GB1702976A
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
Priority claimed from US05/572,683 external-priority patent/US3950680A/en
Priority claimed from US05/607,746 external-priority patent/US4077709A/en
Application filed by Xerox Corp filed Critical Xerox Corp
Publication of GB1533311A publication Critical patent/GB1533311A/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
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/163—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap
    • G03G15/1635—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using the force produced by an electrostatic transfer field formed between the second base and the electrographic recording member, e.g. transfer through an air gap the field being produced by laying down an electrostatic charge behind the base or the recording member, e.g. by a corona device
    • G03G15/1645—Arrangements for controlling the amount of charge
    • 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
    • G03G15/0266—Arrangements for controlling the amount of charge

Landscapes

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

Abstract

1533311 Electrophotographic copying apparatus XEROX CORP 27 April 1976 [28 April 1975 26 Aug 1975] 17029/76 Heading B6C The apparatus comprises an imaging surface 12 with an electrically grounded substrate; a plurality of separate corona generators 14, 24, 33, 34, 46 having corona emitting electrodes 52 shielded with conductive shields 60; and current measurement means connectable between separate power supply means for each generator and said grounded substrate for measuring only the output current flowing between each individual corona generator and said imaging surface 12 independently of current flow to its respective shield 60, independently of input current to the generator, and independently of the flow of output current from other corona generators to said imaging surface 12. The current is measured by switching a volmeter to points A, C, D, E or F and measuring the potential across a pre-set resistor, such as 58 at point A. The D.C. and A.C. components of the current may be separately measured for A.C. generators 24, 34. The bias applied to the applicator rolls 22 of developing apparatus 20 may be measured also, at point B. Means for retroactively controlling each power supply means 54, to maintain a selected output current for its respective corona generator, is also provided.
GB1702976A 1975-04-28 1976-04-27 Electrostatographic diagnostics system Expired GB1533311A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US05/572,683 US3950680A (en) 1975-04-28 1975-04-28 Electrostatographic diagnostics system
US05/607,746 US4077709A (en) 1975-08-26 1975-08-26 Transfer charge control system

Publications (1)

Publication Number Publication Date
GB1533311A true GB1533311A (en) 1978-11-22

Family

ID=27075910

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1702976A Expired GB1533311A (en) 1975-04-28 1976-04-27 Electrostatographic diagnostics system

Country Status (5)

Country Link
JP (1) JPS51131635A (en)
DE (1) DE2611503C2 (en)
FR (1) FR2309908A1 (en)
GB (1) GB1533311A (en)
NL (1) NL7602999A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0109722A1 (en) * 1982-11-19 1984-05-30 N.V. Nederlandsche Apparatenfabriek NEDAP A method and an apparatus for automatically adjusting the potential of a photosensitive layer
EP0164262A2 (en) * 1984-06-01 1985-12-11 Kabushiki Kaisha Toshiba Developing apparatus
US4688923A (en) * 1985-02-20 1987-08-25 Kabushiki Kaisha Toshiba Developing apparatus

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5394931A (en) * 1977-01-28 1978-08-19 Ricoh Co Ltd Charging method
JPS53116163A (en) * 1977-03-18 1978-10-11 Canon Inc Electric charger for electrophotography
JPS549631A (en) * 1977-06-22 1979-01-24 Fujitsu Ltd Automatic control system for charging amount
JPS5418746A (en) * 1977-07-12 1979-02-13 Ricoh Co Ltd Destaticizing and separating device
JPS5483839A (en) * 1977-12-16 1979-07-04 Canon Inc Image control
GB2039101B (en) * 1978-08-24 1983-05-25 Canon Kk Control of electrostatic recording apparatus
JPS5535331A (en) * 1978-09-04 1980-03-12 Ricoh Co Ltd Transfer method of electrophotographic copier
DE2849222A1 (en) * 1978-11-13 1980-05-22 Hoechst Ag METHOD FOR ELECTROSTATICALLY CHARGING A DIELECTRIC LAYER AND DEVICE FOR CARRYING OUT THE METHOD
JPS5640871A (en) * 1979-09-13 1981-04-17 Canon Inc Method and device for electrostatic isolation
JPS5647064A (en) * 1979-09-25 1981-04-28 Konishiroku Photo Ind Co Ltd Discharge quantity controlling method of discharger for electrophotography or electrostatic recording
JPS57182761A (en) * 1981-05-05 1982-11-10 Ricoh Co Ltd Corona discharging device
JPS5825661A (en) * 1981-08-07 1983-02-15 Ricoh Co Ltd Electrostatic charger
JPS5972067A (en) * 1982-10-18 1984-04-23 Toshiba Corp Detector for abnormality of electrifier
JPS59133570A (en) * 1983-01-20 1984-07-31 Sharp Corp Abnormality detecting device of corona discharger
DE3444554A1 (en) * 1984-12-06 1986-06-12 Ernst Roederstein Spezialfabrik für Kondensatoren GmbH, 8300 Landshut Circuit arrangement for voltage and current stabilisation of a high-voltage generator

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE715685A (en) * 1967-07-06 1968-10-16
US3557368A (en) * 1968-01-25 1971-01-19 Iwatsu Electric Co Ltd Charging device applied for making electrophotography
US3813548A (en) * 1971-01-21 1974-05-28 Xerox Corp Corona generating methods and apparatus therefor
BE794567A (en) * 1972-01-27 1973-07-26 Xerox Corp PERFECTIONED METHODS OF TRANSFER OF ELECTROSTATIC IMAGES AND APPARATUS FOR IMPLEMENTING THESE METHODS
DE2213419A1 (en) * 1972-03-20 1973-10-04 Kalle Ag METHODS FOR REDUCING OZONE PRODUCTION
US3805069A (en) * 1973-01-18 1974-04-16 Xerox Corp Regulated corona generator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0109722A1 (en) * 1982-11-19 1984-05-30 N.V. Nederlandsche Apparatenfabriek NEDAP A method and an apparatus for automatically adjusting the potential of a photosensitive layer
EP0164262A2 (en) * 1984-06-01 1985-12-11 Kabushiki Kaisha Toshiba Developing apparatus
EP0164262A3 (en) * 1984-06-01 1986-01-22 Kabushiki Kaisha Toshiba Developing apparatus
US4653426A (en) * 1984-06-01 1987-03-31 Kabushiki Kaisha Toshiba Developing apparatus
US4688923A (en) * 1985-02-20 1987-08-25 Kabushiki Kaisha Toshiba Developing apparatus

Also Published As

Publication number Publication date
DE2611503C2 (en) 1986-09-04
JPS51131635A (en) 1976-11-16
FR2309908A1 (en) 1976-11-26
NL7602999A (en) 1976-11-01
DE2611503A1 (en) 1976-11-18
FR2309908B1 (en) 1982-05-14

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee