GB1477885A - Thermally insensitive particle concentration controller - Google Patents

Thermally insensitive particle concentration controller

Info

Publication number
GB1477885A
GB1477885A GB4643474A GB4643474A GB1477885A GB 1477885 A GB1477885 A GB 1477885A GB 4643474 A GB4643474 A GB 4643474A GB 4643474 A GB4643474 A GB 4643474A GB 1477885 A GB1477885 A GB 1477885A
Authority
GB
United Kingdom
Prior art keywords
drum
toner
particle concentration
light
electrode
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
GB4643474A
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 GB1477885A publication Critical patent/GB1477885A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D21/00—Control of chemical or physico-chemical variables, e.g. pH value
    • G05D21/02—Control of chemical or physico-chemical variables, e.g. pH value characterised by the use of electric 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
    • G03G15/06—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S222/00—Dispensing
    • Y10S222/01—Xerography

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Dry Development In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Color Electrophotography (AREA)

Abstract

1477885 Controlling toner particle concentration XEROX CORP 28 Oct 1974 [5 Nov 1973] 46434/74 Heading G2H An apparatus which indicates toner concentration comprises an electrode means 46 mounted in a rotatable photo-sensitive drum 10, the means 46 being electrically biased to attract toner particles when it passes through the mix. Light means 48 irradiates the electrode means 46 via fiber optics 50, 62 and a photodiode 52 mounted near the drum 10 monitors the intensity of light passing through the particles on the electrode 46 and produces a thermally insensitive electrical signal which is amplified to a usable level. Amplifying circuit means, which interprets the signal, is described. The light 48 may be mounted in the drum 10. A toner dispenser is activated by the amplified signal.
GB4643474A 1973-11-05 1974-10-28 Thermally insensitive particle concentration controller Expired GB1477885A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US413108A US3926338A (en) 1973-11-05 1973-11-05 Thermally insensitive particle concentration controller

Publications (1)

Publication Number Publication Date
GB1477885A true GB1477885A (en) 1977-06-29

Family

ID=23635864

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4643474A Expired GB1477885A (en) 1973-11-05 1974-10-28 Thermally insensitive particle concentration controller

Country Status (7)

Country Link
US (1) US3926338A (en)
JP (1) JPS5080143A (en)
CA (1) CA1039344A (en)
DE (1) DE2450145C3 (en)
FR (1) FR2250150B1 (en)
GB (1) GB1477885A (en)
NL (1) NL7413729A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7604400A (en) * 1976-04-26 1977-10-28 Oce Van Der Grinten Nv DEVICE FOR DEVELOPING AN ELECTROSTATIC CHARGING IMAGE.
JPS5420742A (en) * 1977-07-15 1979-02-16 Canon Inc Concentration detecting method of developer
US4183657A (en) * 1978-04-10 1980-01-15 International Business Machines Corporation Dynamic reference for an image quality control system
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
US4372672A (en) * 1980-12-22 1983-02-08 International Business Machines Corporation Self-triggering quality control sensor
US11801502B2 (en) 2021-09-13 2023-10-31 Chevron Phillips Chemical Company Lp Hydrocyclone modification of catalyst system components for use in olefin polymerization

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3376854A (en) * 1966-06-01 1968-04-09 Xerox Corp Automatic toner dispensing control
US3470538A (en) * 1966-12-28 1969-09-30 Allegheny Ludlum Steel Automatic start circuit for computer
US3399652A (en) * 1967-06-14 1968-09-03 Addressograph Multigraph Automatic toner concentrate detector
US3487978A (en) * 1967-06-14 1970-01-06 Addressograph Multigraph Automatic toner concentrate detector
BE793425A (en) * 1971-12-28 1973-06-28 Xerox Corp METHOD AND DEVICE FOR AUTOMATICALLY ADJUSTING THE DEVELOPMENT OF COLOR IMAGES
US3777173A (en) * 1972-02-22 1973-12-04 Dyke Res Van Xerographic toner concentration measuring apparatus and method

Also Published As

Publication number Publication date
JPS5080143A (en) 1975-06-30
DE2450145C3 (en) 1981-09-17
DE2450145B2 (en) 1980-10-23
CA1039344A (en) 1978-09-26
FR2250150A1 (en) 1975-05-30
NL7413729A (en) 1975-01-31
US3926338A (en) 1975-12-16
DE2450145A1 (en) 1975-05-07
FR2250150B1 (en) 1977-11-04

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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