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GB1303148A - - Google Patents

Info

Publication number
GB1303148A
GB1303148A GB4043170A GB4043170A GB1303148A GB 1303148 A GB1303148 A GB 1303148A GB 4043170 A GB4043170 A GB 4043170A GB 4043170 A GB4043170 A GB 4043170A GB 1303148 A GB1303148 A GB 1303148A
Authority
GB
United Kingdom
Prior art keywords
potential
electrode
charged surface
shutter
aug
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
GB4043170A
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 filed Critical
Publication of GB1303148A publication Critical patent/GB1303148A/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
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/065—Arrangements for controlling the potential of the developing electrode

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Developing For Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

1303148 Measuring electrostatic potential XEROX CORP 21 Aug 1970 [29 Aug 1969] 40431/70 Heading G1U [Also in Division G2] An electrode 92, Fig.4, surrounded by insulating material 93 and an earthed screen 91 is periodically exposed, by a solenoid actuated shutter, Fig.3 (not shown) to an electrostatically charged surface forming part of a copying machine, (see Division G2) in order to measure the potential thereof. The output from the electrode 92 is amplified 81, 83, 84, and passed via a contact 85 which is closed for a short period commencing an appropriate period after the electrode is exposed to the charged surface, to store a potential on a capacitor 87 indicative of the potential of the charged surface. A suitable timing circuit, Fig.5 (not shown) is described for delaying the closure of contact 85 following energization of the shutter solenoid by a control pulse produced within the copying machine. The timing circuit also arranges that the potential of the closed shutter, which is earthed, is sensed at appropriate instants, to reduce drift in the first amplifier stage 81.
GB4043170A 1969-08-29 1970-08-21 Expired GB1303148A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US85408669A 1969-08-29 1969-08-29

Publications (1)

Publication Number Publication Date
GB1303148A true GB1303148A (en) 1973-01-17

Family

ID=25317694

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4043170A Expired GB1303148A (en) 1969-08-29 1970-08-21

Country Status (12)

Country Link
US (1) US3611982A (en)
JP (1) JPS4920097B1 (en)
BE (1) BE755383A (en)
CH (1) CH523526A (en)
DE (1) DE2041950A1 (en)
ES (1) ES383058A1 (en)
FR (1) FR2059929A5 (en)
GB (1) GB1303148A (en)
NL (1) NL7012467A (en)
PL (1) PL80986B1 (en)
SE (1) SE361750B (en)
SU (1) SU473382A3 (en)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784397A (en) * 1970-02-04 1974-01-08 Xerox Corp Imaging system
JPS5144408B1 (en) * 1970-12-26 1976-11-29
US3678897A (en) * 1971-01-28 1972-07-25 Xerox Corp Developer mixing apparatus
US3739800A (en) * 1971-05-04 1973-06-19 Copystatics Mfg Corp Toner supply system for copying machine
DE2410741A1 (en) * 1973-05-14 1974-12-12 Xerox Corp CONTROLLER FOR REPRODUCTION EQUIPMENT
US3815988A (en) * 1973-05-17 1974-06-11 Xerox Corp Image density control apparatus
US3922380A (en) * 1973-06-18 1975-11-25 Eastman Kodak Co Auto bias control method
US3852668A (en) * 1973-08-14 1974-12-03 Xerox Corp Electrometer system
US3898001A (en) * 1973-08-14 1975-08-05 Xerox Corp Electrometer system for non-contact detection of electrostatic charge on a moving electrostatographic imaging surface
US3875892A (en) * 1974-01-14 1975-04-08 Ransburg Corp Apparatus for avoiding sparks in an electrostatic coating system
US3918395A (en) * 1974-03-04 1975-11-11 Eastman Kodak Co Continuous bias control for electrographic development apparatus
JPS50140138A (en) * 1974-04-30 1975-11-10
US4129375A (en) * 1974-05-10 1978-12-12 Ricoh Company, Ltd. Method and apparatus for electrically biasing developing electrode of electrophotography device
US4050806A (en) * 1974-05-10 1977-09-27 Ricoh Co., Ltd. Method and apparatus for electrically biasing developing electrode of electrophotographic device
US3892481A (en) * 1974-06-17 1975-07-01 Savin Business Machines Corp Automatic development electrode bias control system
USRE31964E (en) * 1974-06-17 1985-08-06 Savin Corporation Automatic development electrode bias control system
US4141643A (en) * 1974-09-13 1979-02-27 Ricoh Company, Ltd. Developing electrode arrangement for electrophotographic apparatus
JPS5174634A (en) * 1974-12-24 1976-06-28 Ricoh Kk Denshishashinno baiasugenzohoho
US3998538A (en) * 1975-02-24 1976-12-21 Xerox Corporation Electrometer apparatus for reproduction machines
US3981267A (en) * 1975-05-20 1976-09-21 Savin Business Machines Corporation Electrophotographic liquid developing system
JPS52107392U (en) * 1976-02-10 1977-08-16
US4100484A (en) * 1976-11-26 1978-07-11 Xerox Corporation D.C. Electrometer
US4063155A (en) * 1976-11-26 1977-12-13 Xerox Corporation D.C. Electrometer probe
JPS53116844A (en) * 1977-03-22 1978-10-12 Minolta Camera Co Ltd Magnetic brush type developing apparatus for zerographic copying machine
US4266870A (en) * 1978-03-09 1981-05-12 Ricoh Company, Ltd. Electrostatographic apparatus comprising developing bias means
US4179213A (en) * 1978-04-10 1979-12-18 International Business Machines Corporation Vector pinning in an electrophotographic machine
US4178095A (en) * 1978-04-10 1979-12-11 International Business Machines Corporation Abnormally low reflectance photoconductor sensing system
US4183657A (en) * 1978-04-10 1980-01-15 International Business Machines Corporation Dynamic reference for an image quality control system
US4330749A (en) * 1978-12-25 1982-05-18 Ricoh Company, Ltd. Electrometer apparatus
USRE30477E (en) * 1979-05-10 1981-01-13 Savin Corporation Electrophotographic liquid developing system
JPS5749977A (en) * 1980-09-09 1982-03-24 Minolta Camera Co Ltd Copying machine
DE3232444A1 (en) * 1982-09-01 1984-03-01 Gossen Gmbh, 8520 Erlangen Circuit arrangement for adding small charge quantities during a short measuring period
US4724461A (en) * 1987-04-06 1988-02-09 Eastman Kodak Company Dynamic process control for electrostatographic machines
JP2738749B2 (en) * 1989-08-07 1998-04-08 株式会社リコー Image forming device
US5857456A (en) * 1996-06-10 1999-01-12 Sarnoff Corporation Inhaler apparatus with an electronic means for enhanced release of dry powders

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956487A (en) * 1955-03-23 1960-10-18 Rca Corp Electrostatic printing
US3147147A (en) * 1961-06-05 1964-09-01 Xerox Corp Xerographic developing apparatus and electrode
US3424131A (en) * 1964-09-30 1969-01-28 Xerox Corp Electroded cascade development system
US3412710A (en) * 1966-10-11 1968-11-26 Xerox Corp Cleanup electrode
US3506259A (en) * 1967-10-12 1970-04-14 Xerox Corp Electrostatic sheet detacking apparatus
US3416494A (en) * 1967-12-26 1968-12-17 Xerox Corp Xerographic development electrode
US3430606A (en) * 1968-01-02 1969-03-04 Xerox Corp Electroscopic particle sensor

Also Published As

Publication number Publication date
ES383058A1 (en) 1973-04-16
FR2059929A5 (en) 1971-06-04
JPS4920097B1 (en) 1974-05-22
CH523526A (en) 1972-05-31
PL80986B1 (en) 1975-08-30
DE2041950A1 (en) 1971-03-11
SU473382A3 (en) 1975-06-05
US3611982A (en) 1971-10-12
BE755383A (en) 1971-03-01
NL7012467A (en) 1971-03-02
SE361750B (en) 1973-11-12

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee