GB1475547A - Apparatus for controlling toner concentration of a developer in electrostatic development - Google Patents

Apparatus for controlling toner concentration of a developer in electrostatic development

Info

Publication number
GB1475547A
GB1475547A GB2197674A GB2197674A GB1475547A GB 1475547 A GB1475547 A GB 1475547A GB 2197674 A GB2197674 A GB 2197674A GB 2197674 A GB2197674 A GB 2197674A GB 1475547 A GB1475547 A GB 1475547A
Authority
GB
United Kingdom
Prior art keywords
developer
probe
toner
amount
attached
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
GB2197674A
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta 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 Konica Minolta Inc filed Critical Konica Minolta Inc
Publication of GB1475547A publication Critical patent/GB1475547A/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)

Abstract

1475547 Automatic control of concentration KONISHIROKU PHOTO INDUSTRY CO Ltd 17 May 1974 [25 May 1973] 21976/74 Heading G3R In apparatus for controlling the concentration of toner particles in a developer used in electrophotographic copying equipment, toner particles from the developer are attached to a rotatable probe 32 by virtue of induced image force, and means are provided which measure the amount of toner attached to the probe and control means for replenishing the toner in the developer. As shown, developer D is urged by a rotating magnetic brush 23 past a drum 1, carrying an electrostatic image, and also past probe 32 which is preferably of conductive glass with a coating of tin oxide, aluminium copper, brass or iron. The probe surface may be covered by a thin protective insulating layer. The probe picks up toner particles from a cloud thereof formed in a space 50 by the relative rotation of probe 32 and developer D'. The amount of toner attached is measured photoelectrically, either by transmission, by means of lamp 33 and detector 34, or by reflection; alternatively the amount of electrical charge of the deposited toner may be measured. The photoelectric detector output, is fed to a circuit Fig. 5, (not shown) which operates a replenishing toner container 4.
GB2197674A 1973-05-25 1974-05-17 Apparatus for controlling toner concentration of a developer in electrostatic development Expired GB1475547A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP48057831A JPS5246095B2 (en) 1973-05-25 1973-05-25

Publications (1)

Publication Number Publication Date
GB1475547A true GB1475547A (en) 1977-06-01

Family

ID=13066870

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2197674A Expired GB1475547A (en) 1973-05-25 1974-05-17 Apparatus for controlling toner concentration of a developer in electrostatic development

Country Status (4)

Country Link
US (1) US3897748A (en)
JP (1) JPS5246095B2 (en)
DE (1) DE2425060C3 (en)
GB (1) GB1475547A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0029584A1 (en) * 1979-11-26 1981-06-03 Hitachi, Ltd. Method for operating electrophotographic copying apparatus

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS613004Y2 (en) * 1975-01-13 1986-01-30
JPS56275Y2 (en) * 1977-04-18 1981-01-07
JPS6020119Y2 (en) * 1978-03-27 1985-06-17 株式会社東芝 Toner density control device
JPS54135537A (en) * 1978-04-12 1979-10-20 Ricoh Co Ltd Developing performance detector for binary dry type developer
JPS602598Y2 (en) * 1978-04-19 1985-01-24 株式会社東芝 Toner concentration detection device
US4273843A (en) * 1978-06-12 1981-06-16 Konishiroku Photo Industry Co., Ltd. Method of detecting toner concentration in electrophotographic copying machine
JPS5521070A (en) * 1978-08-02 1980-02-14 Toshiba Corp Toner density control device in dry type developing apparatus
JPS5842073A (en) * 1981-09-08 1983-03-11 Fuji Xerox Co Ltd Developer density controller
JPS59164574A (en) * 1983-03-10 1984-09-17 Fuji Xerox Co Ltd Toner density detector in dry type electrophotographic copying machine
GB2186818B (en) * 1986-02-20 1990-07-11 Ricoh Kk Developing electrostatic latent images
US4980727A (en) * 1990-04-02 1990-12-25 Eastman Kodak Company Toner concentration control system
JP2011022293A (en) * 2009-07-15 2011-02-03 Toshiba Corp Developing device, image forming device, and developer deterioration detecting method

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3094049A (en) * 1961-02-03 1963-06-18 Xerox Corp Xerographic developer measuring apparatus
US3390652A (en) * 1967-02-06 1968-07-02 Nathan K. Morris Hand held and operated sewing machine
US3430606A (en) * 1968-01-02 1969-03-04 Xerox Corp Electroscopic particle sensor
US3604939A (en) * 1968-05-24 1971-09-14 Xerox Corp Toner concentration sensing apparatus having plural sensors and a flow control means for each sensor
US3610205A (en) * 1968-10-17 1971-10-05 Continental Can Co Apparatus for measuring and controlling mixture content
US3572551A (en) * 1969-03-27 1971-03-30 Rca Corp Apparatus for monitoring and controlling the concentration of toner in a developer mix
BE757197A (en) * 1969-10-09 1971-03-16 Rca Corp DEVICE FOR MONITORING AND ADJUSTING THE CONCENTRATION OF POWDER PARTICLES IN A MIXTURE OF POWDER AND MAGNETIC PARTICLES
US3707134A (en) * 1970-08-21 1972-12-26 Addressograph Multigraph Automatic toner concentrate detector and control device
US3830401A (en) * 1971-12-13 1974-08-20 Eastman Kodak Co Toner concentration monitoring apparatus
US3791744A (en) * 1972-02-22 1974-02-12 Dyk Res Corp Van Xerographic toner concentration measuring apparatus and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0029584A1 (en) * 1979-11-26 1981-06-03 Hitachi, Ltd. Method for operating electrophotographic copying apparatus

Also Published As

Publication number Publication date
DE2425060A1 (en) 1974-12-12
DE2425060C3 (en) 1981-09-10
JPS5246095B2 (en) 1977-11-21
JPS5010141A (en) 1975-02-01
US3897748A (en) 1975-08-05
DE2425060B2 (en) 1981-01-08

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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