GB1477887A - Particle concentration control apparatus - Google Patents

Particle concentration control apparatus

Info

Publication number
GB1477887A
GB1477887A GB4786474A GB4786474A GB1477887A GB 1477887 A GB1477887 A GB 1477887A GB 4786474 A GB4786474 A GB 4786474A GB 4786474 A GB4786474 A GB 4786474A GB 1477887 A GB1477887 A GB 1477887A
Authority
GB
United Kingdom
Prior art keywords
nov
intensity
control apparatus
particle concentration
concentration control
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
GB4786474A
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
Application filed by Xerox Corp filed Critical Xerox Corp
Publication of GB1477887A publication Critical patent/GB1477887A/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
    • 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
    • G03G15/5041—Detecting a toner image, e.g. density, toner coverage, using a test patch

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Dry Development In Electrophotography (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1477887 Measuring toner concentration XEROX CORP 5 Nov 1974 [15 Nov 1973] 47864/74 Heading G1A [Also in Division G2] In an electro-photographic apparatus a light source 50 illuminates a periodically electrically biased electrode 48 mounted in the drum 10. The intensity of light transmitted through the electrode 48 and its associated attracted toner particles is detected by a photo-sensor 56 which produces an electrical signal corresponding to the intensity. Circuitry compares the signal with a reference and adjusts toner replenishing means accordingly. Fibre optics 52 transmit light from source 50.
GB4786474A 1973-11-15 1974-11-05 Particle concentration control apparatus Expired GB1477887A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US416154A US3873197A (en) 1973-11-15 1973-11-15 Apparatus for regulating the toner concentration in a electrophotographic device

Publications (1)

Publication Number Publication Date
GB1477887A true GB1477887A (en) 1977-06-29

Family

ID=23648784

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4786474A Expired GB1477887A (en) 1973-11-15 1974-11-05 Particle concentration control apparatus

Country Status (3)

Country Link
US (1) US3873197A (en)
CA (1) CA1037105A (en)
GB (1) GB1477887A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4146325A (en) * 1974-03-04 1979-03-27 Siemens Aktiengesellschaft Method and apparatus for visualization of electrostatic images
JPS5497038A (en) * 1978-01-17 1979-07-31 Konishiroku Photo Ind Co Ltd Image density controller for zerographic copier
US4292530A (en) * 1980-03-03 1981-09-29 Minnesota Mining And Manufacturing Company Developer material level sensor
US4372672A (en) * 1980-12-22 1983-02-08 International Business Machines Corporation Self-triggering quality control sensor
US4974024A (en) * 1989-07-03 1990-11-27 Xerox Corporation Predictive toner dispenser controller

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3682132A (en) * 1969-03-03 1972-08-08 Xerox Corp Automatic developer controller
US3635373A (en) * 1969-12-29 1972-01-18 Xerox Corp Automatic developability control apparatus
US3674353A (en) * 1971-07-01 1972-07-04 Eastman Kodak Co Toner concentration control apparatus
BE793425A (en) * 1971-12-28 1973-06-28 Xerox Corp METHOD AND DEVICE FOR AUTOMATICALLY ADJUSTING THE DEVELOPMENT OF COLOR IMAGES

Also Published As

Publication number Publication date
US3873197A (en) 1975-03-25
CA1037105A (en) 1978-08-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee