CA1039344A - Thermally insensitive particle concentration controller - Google Patents

Thermally insensitive particle concentration controller

Info

Publication number
CA1039344A
CA1039344A CA206,943A CA206943A CA1039344A CA 1039344 A CA1039344 A CA 1039344A CA 206943 A CA206943 A CA 206943A CA 1039344 A CA1039344 A CA 1039344A
Authority
CA
Canada
Prior art keywords
operational amplifier
recited
circuit means
photodiode
toner particles
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
CA206,943A
Other languages
English (en)
French (fr)
Inventor
Noel L. Reyner
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
Application granted granted Critical
Publication of CA1039344A publication Critical patent/CA1039344A/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)
CA206,943A 1973-11-05 1974-08-13 Thermally insensitive particle concentration controller Expired CA1039344A (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
CA1039344A true CA1039344A (en) 1978-09-26

Family

ID=23635864

Family Applications (1)

Application Number Title Priority Date Filing Date
CA206,943A Expired CA1039344A (en) 1973-11-05 1974-08-13 Thermally insensitive particle concentration controller

Country Status (7)

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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7604400A (nl) * 1976-04-26 1977-10-28 Oce Van Der Grinten Nv Inrichting voor het ontwikkelen van een elektro- statisch ladingsbeeld.
JPS5420742A (en) * 1977-07-15 1979-02-16 Canon Inc Concentration detecting method of developer
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

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
US3487978A (en) * 1967-06-14 1970-01-06 Addressograph Multigraph Automatic toner concentrate detector
US3399652A (en) * 1967-06-14 1968-09-03 Addressograph Multigraph Automatic toner concentrate detector
BE793425A (fr) * 1971-12-28 1973-06-28 Xerox Corp Procede et dispositif pour regler automatiquement le developpement d'images de couleurs
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 (ja) 1975-06-30
DE2450145B2 (de) 1980-10-23
DE2450145C3 (de) 1981-09-17
DE2450145A1 (de) 1975-05-07
FR2250150B1 (ja) 1977-11-04
US3926338A (en) 1975-12-16
GB1477885A (en) 1977-06-29
NL7413729A (nl) 1975-01-31
FR2250150A1 (ja) 1975-05-30

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