GB1483472A - Electrostatic copying - Google Patents

Electrostatic copying

Info

Publication number
GB1483472A
GB1483472A GB3244/77A GB324477A GB1483472A GB 1483472 A GB1483472 A GB 1483472A GB 3244/77 A GB3244/77 A GB 3244/77A GB 324477 A GB324477 A GB 324477A GB 1483472 A GB1483472 A GB 1483472A
Authority
GB
United Kingdom
Prior art keywords
toner
wheel
toner concentration
sensing
magnetic brush
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
GB3244/77A
Other languages
English (en)
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.)
AB Dick Co
Original Assignee
Multigraphics Inc
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 Multigraphics Inc filed Critical Multigraphics Inc
Publication of GB1483472A publication Critical patent/GB1483472A/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
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822—Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0848—Arrangements for testing or measuring developer properties or quality, e.g. charge, size, flowability
    • G03G15/0849—Detection or control means for the developer concentration
    • G03G15/0855—Detection or control means for the developer concentration the concentration being measured by optical means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)
GB3244/77A 1973-12-03 1974-11-06 Electrostatic copying Expired GB1483472A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US421226A US3911861A (en) 1973-12-03 1973-12-03 Programmable toner concentration control

Publications (1)

Publication Number Publication Date
GB1483472A true GB1483472A (en) 1977-08-17

Family

ID=23669688

Family Applications (2)

Application Number Title Priority Date Filing Date
GB48048/74A Expired GB1483471A (en) 1973-12-03 1974-11-06 Electrostatic copying
GB3244/77A Expired GB1483472A (en) 1973-12-03 1974-11-06 Electrostatic copying

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB48048/74A Expired GB1483471A (en) 1973-12-03 1974-11-06 Electrostatic copying

Country Status (5)

Country Link
US (1) US3911861A (fr)
CA (1) CA1034184A (fr)
DE (1) DE2456936A1 (fr)
FR (1) FR2253233B1 (fr)
GB (2) GB1483471A (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4082445A (en) * 1975-11-21 1978-04-04 Xerox Corporation Toner control system for an electrostatic reproduction machine
JPS6020119Y2 (ja) * 1978-03-27 1985-06-17 株式会社東芝 トナ−濃度制御装置
US4178095A (en) * 1978-04-10 1979-12-11 International Business Machines Corporation Abnormally low reflectance photoconductor sensing system
US4179213A (en) * 1978-04-10 1979-12-18 International Business Machines Corporation Vector pinning in an electrophotographic machine
US4183657A (en) * 1978-04-10 1980-01-15 International Business Machines Corporation Dynamic reference for an image quality control system
US4372672A (en) * 1980-12-22 1983-02-08 International Business Machines Corporation Self-triggering quality control sensor
US4357901A (en) * 1981-09-03 1982-11-09 Bunnington Corporation Method and system for magnetically sensing and controlling toner concentration and optical density of copies in electrostatic reproduction
JPS5842073A (ja) * 1981-09-08 1983-03-11 Fuji Xerox Co Ltd 現像剤の濃度制御装置
US5192972A (en) * 1990-12-24 1993-03-09 Eastman Kodak Company Developer mix monitoring for color developer stations
US5148217A (en) * 1991-06-24 1992-09-15 Eastman Kodak Company Electrostatographic copier/printer densitometer insensitive to power supply variations
JP6938445B2 (ja) * 2018-07-19 2021-09-22 キヤノン株式会社 画像形成装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3580673A (en) * 1968-08-26 1971-05-25 Xerox Corp Cleaning apparatus
US3682132A (en) * 1969-03-03 1972-08-08 Xerox Corp Automatic developer controller
US3818864A (en) * 1971-09-14 1974-06-25 Xerox Corp Image developing apparatus
US3756192A (en) * 1971-12-17 1973-09-04 Ibm Automatic toner concentration control system
US3791744A (en) * 1972-02-22 1974-02-12 Dyk Res Corp Van Xerographic toner concentration measuring apparatus and method
US3801196A (en) * 1973-04-20 1974-04-02 Xerox Corp Toner concentration regulating apparatus

Also Published As

Publication number Publication date
FR2253233B1 (fr) 1978-09-15
FR2253233A1 (fr) 1975-06-27
DE2456936A1 (de) 1975-06-05
CA1034184A (fr) 1978-07-04
GB1483471A (en) 1977-08-17
US3911861A (en) 1975-10-14

Similar Documents

Publication Publication Date Title
GB1503047A (en) Electrophotographic copier/printer apparatus
GB1487224A (en) Apparatus for cleaning residual toner from an electrostatic recording medium
GB1483472A (en) Electrostatic copying
GB1446531A (en) Electrophotographic copying appliance
GB1304236A (fr)
GB1539361A (en) Dry toner for developing electrostatic latent images
GB1478039A (en) Control circuit used in development of electrostatic latent images and developing apparatus
US4500198A (en) Multiple roller magnetic brush developer having development electrode voltage switching
GB1381910A (en) Plural electrode development of electrostatic latent images
DE3852403D1 (de) Tonerbehälter für Entwicklungsvorrichtung eines latenten elektrostatischen Bildes.
GB1527441A (en) Electrophotographic apparatus
JPS5624359A (en) Dry type binary developer for two-color electrophotography
GB1481003A (en) Electrophotographic apparatus
GB1443667A (en) Magnetic brush type developing mechanism for an electrophoto graphic copying machine
GB1539442A (en) Toner for developing electrostatic latent images
GB1214512A (en) Developing electrostatic images
GB1535427A (en) Electrophotographic printing machine
US3650616A (en) Mispuff detector
JPH10142923A (ja) 現像剤濃度測定装置
GB1409815A (en) Developing apparatus
GB1336660A (en) Electrophotographic apparatus
GB1282991A (en) Electrostatographic developing apparatus
JPS5921035B2 (ja) 静電潜像現像装置
JPS5538522A (en) Electrophotographic type image recording method
GB1296416A (fr)

Legal Events

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