EP0098509A3 - Electrostatic field control method and apparatus - Google Patents

Electrostatic field control method and apparatus Download PDF

Info

Publication number
EP0098509A3
EP0098509A3 EP83106300A EP83106300A EP0098509A3 EP 0098509 A3 EP0098509 A3 EP 0098509A3 EP 83106300 A EP83106300 A EP 83106300A EP 83106300 A EP83106300 A EP 83106300A EP 0098509 A3 EP0098509 A3 EP 0098509A3
Authority
EP
European Patent Office
Prior art keywords
predetermined
signal
exposure
exposed
charge
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.)
Withdrawn
Application number
EP83106300A
Other languages
German (de)
French (fr)
Other versions
EP0098509A2 (en
Inventor
Harold J. Weber
Donald Richardson
John N. Poulakis
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.)
Coulter Systems Corp
Original Assignee
Coulter Systems 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 Coulter Systems Corp filed Critical Coulter Systems Corp
Publication of EP0098509A2 publication Critical patent/EP0098509A2/en
Publication of EP0098509A3 publication Critical patent/EP0098509A3/en
Withdrawn legal-status Critical Current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
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5033—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the photoconductor characteristics, e.g. temperature, or the characteristics of an image on the photoconductor
    • G03G15/5037—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the photoconductor characteristics, e.g. temperature, or the characteristics of an image on the photoconductor the characteristics being an electrical parameter, e.g. voltage
    • 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
    • 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)
  • Microelectronics & Electronic Packaging (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

For electrophotographic imaging in which a photocon­ ductive surface is moved past a corona generating device, charged, exposed and toned, a method and apparatus for es­ tablishing a predetermined apparat surface voltage charge on the photoconductive surface at the start of the toning function and providing exposure control thereof. The photoconductive surface is charged with a ramped, staircase pattern of corona output levels. A selected region of the photoconductive sur­ face is moved over an exposure lamp to provide exposed and unexposed regions, exposure taking place for a predeter­ mined period of time to illuminate and at least partially dis­ charge the selected, exposed region of the photoconductive surface. The electrostatic field charge on said surface is de­ tected and related to the movement of the photoconductive surface. The detected charge levels for the exposed and unex­ posed regions are compared to a predetermined signal to pro­ vide a comparison signal for control tasks. The predetermined signal includes both the desired electrostatic field charge levels and a profile of the characteristics of the particular expo­ sure lamp. The predetermined signal is stored in a control logic unit memory, the measured signal and the predetermined sig­ nal compared and control signals provided to regulate the a) corona output level, b) the exposure light intensity and c) the duration of exposure in accordance with both the detected signal and the predetermined stored signal.
EP83106300A 1982-06-28 1983-06-28 Electrostatic field control method and apparatus Withdrawn EP0098509A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US39317382A 1982-06-28 1982-06-28
US393173 1982-06-28

Publications (2)

Publication Number Publication Date
EP0098509A2 EP0098509A2 (en) 1984-01-18
EP0098509A3 true EP0098509A3 (en) 1984-09-05

Family

ID=23553583

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83106300A Withdrawn EP0098509A3 (en) 1982-06-28 1983-06-28 Electrostatic field control method and apparatus

Country Status (6)

Country Link
EP (1) EP0098509A3 (en)
JP (1) JPS5946656A (en)
AU (1) AU1632783A (en)
CA (1) CA1194092A (en)
DK (1) DK295383A (en)
IL (1) IL69055A0 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4624548A (en) * 1983-07-22 1986-11-25 Canon Kabushiki Kaisha Image density control device
DE3409701A1 (en) * 1984-03-16 1985-09-19 Hoechst Ag, 6230 Frankfurt METHOD AND ARRANGEMENT FOR COMPLYING WITH A PRESENT POTENTIAL RATIO IN THE EXPOSURE OF ELECTROSTATICALLY CHARGED LIGHT SENSITIVE LAYERS
DE3440197A1 (en) * 1984-11-03 1986-05-07 Hoechst Ag, 6230 Frankfurt METHOD FOR CONTINUOUS, CONTACTLESS LAYER THICKNESS DETERMINATION AND ARRANGEMENT FOR IMPLEMENTING THE METHOD
DE3571710D1 (en) * 1984-11-06 1989-08-24 Toshiba Kk Image forming apparatus with image forming area selection
JPS6236681A (en) * 1985-08-12 1987-02-17 Toshiba Corp Image forming device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788739A (en) * 1972-06-21 1974-01-29 Xerox Corp Image compensation method and apparatus for electrophotographic devices
US3887877A (en) * 1970-08-24 1975-06-03 Robert E Vosteen Feedback electrostatic voltmeter
FR2397663A1 (en) * 1977-07-11 1979-02-09 Canon Kk METHOD AND APPARATUS FOR ADJUSTING THE QUALITY OF ELECTROPHOTOGRAPHIC IMAGE
GB2012058A (en) * 1977-12-21 1979-07-18 Canon Kk Surface potentiometer
US4284344A (en) * 1978-07-27 1981-08-18 Minolta Camera Kabushiki Kaisha Electrophotographic density control

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5738460A (en) * 1980-08-20 1982-03-03 Ricoh Co Ltd Electrifying device of copier

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3887877A (en) * 1970-08-24 1975-06-03 Robert E Vosteen Feedback electrostatic voltmeter
US3788739A (en) * 1972-06-21 1974-01-29 Xerox Corp Image compensation method and apparatus for electrophotographic devices
FR2397663A1 (en) * 1977-07-11 1979-02-09 Canon Kk METHOD AND APPARATUS FOR ADJUSTING THE QUALITY OF ELECTROPHOTOGRAPHIC IMAGE
GB2012058A (en) * 1977-12-21 1979-07-18 Canon Kk Surface potentiometer
US4284344A (en) * 1978-07-27 1981-08-18 Minolta Camera Kabushiki Kaisha Electrophotographic density control

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 6, no. 108(P-123)(986), 18th June 1982 & JP - A - 57 38460 (RICOH K.K.) 03-03-1982 *

Also Published As

Publication number Publication date
IL69055A0 (en) 1983-10-31
AU1632783A (en) 1984-01-05
CA1194092A (en) 1985-09-24
EP0098509A2 (en) 1984-01-18
JPS5946656A (en) 1984-03-16
DK295383D0 (en) 1983-06-27
DK295383A (en) 1983-12-29

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

PUAL Search report despatched

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RHK1 Main classification (correction)

Ipc: G03G 15/02

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17P Request for examination filed

Effective date: 19850506

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19860103

RIN1 Information on inventor provided before grant (corrected)

Inventor name: POULAKIS, JOHN N.

Inventor name: RICHARDSON, DONALD

Inventor name: WEBER, HAROLD J.