BE771604A - AUTOMATIC DETECTION AND CONTROL DEVICE OF THE ALUMINA CONCENTRATION - Google Patents

AUTOMATIC DETECTION AND CONTROL DEVICE OF THE ALUMINA CONCENTRATION

Info

Publication number
BE771604A
BE771604A BE771604A BE771604A BE771604A BE 771604 A BE771604 A BE 771604A BE 771604 A BE771604 A BE 771604A BE 771604 A BE771604 A BE 771604A BE 771604 A BE771604 A BE 771604A
Authority
BE
Belgium
Prior art keywords
control device
automatic detection
alumina concentration
alumina
concentration
Prior art date
Application number
BE771604A
Other languages
French (fr)
Inventor
S A Gawron
Original Assignee
Addressograph Multigraph
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 Addressograph Multigraph filed Critical Addressograph Multigraph
Publication of BE771604A publication Critical patent/BE771604A/en

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
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • 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
    • G03G15/0853—Detection or control means for the developer concentration the concentration being measured by magnetic means

Landscapes

  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Automation & Control Theory (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Dry Development In Electrophotography (AREA)
BE771604A 1970-08-21 1971-08-20 AUTOMATIC DETECTION AND CONTROL DEVICE OF THE ALUMINA CONCENTRATION BE771604A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6590270A 1970-08-21 1970-08-21

Publications (1)

Publication Number Publication Date
BE771604A true BE771604A (en) 1971-12-31

Family

ID=22065914

Family Applications (1)

Application Number Title Priority Date Filing Date
BE771604A BE771604A (en) 1970-08-21 1971-08-20 AUTOMATIC DETECTION AND CONTROL DEVICE OF THE ALUMINA CONCENTRATION

Country Status (7)

Country Link
US (1) US3707134A (en)
JP (1) JPS524942B1 (en)
BE (1) BE771604A (en)
CA (1) CA978585A (en)
DE (1) DE2141870B2 (en)
FR (1) FR2104578A5 (en)
GB (1) GB1367681A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3821938A (en) * 1971-12-17 1974-07-02 Ibm Toner usage sensing system
JPS5246095B2 (en) * 1973-05-25 1977-11-21
JPS5619637B2 (en) * 1973-06-20 1981-05-08
US3999119A (en) * 1975-03-26 1976-12-21 Xerox Corporation Measuring toner concentration
JPS52131729A (en) * 1976-04-28 1977-11-04 Ricoh Co Ltd Toner concentration detection circuit
JPS5349437A (en) * 1976-10-16 1978-05-04 Hitachi Ltd Toner density detector
US4270487A (en) * 1977-10-27 1981-06-02 Hitachi, Ltd. Developer regulating device in developing apparatus
JPS55161261A (en) * 1979-06-01 1980-12-15 Katsuragawa Denki Kk Toner replenishing method and its device
JPS5643556A (en) * 1979-09-19 1981-04-22 Toshiba Corp Concentration control device of developer
GB2076314B (en) * 1980-05-02 1983-09-28 Gestetner Mfg Ltd Magnetic brush developer unit for photocopier
DE3149908A1 (en) * 1980-12-19 1982-09-02 Minolta Camera K.K., Osaka METHOD FOR CONTROLLING THE TONER CONCENTRATION FOR ELECTROPHOTOGRAPHIC COPYERS
US4486090A (en) * 1983-03-21 1984-12-04 Minnesota Mining And Manufacturing Company Copy machine with unauthorized copy prevention
JPS60229074A (en) * 1984-04-27 1985-11-14 Toshiba Corp Toner concentration detecting device
US5166729A (en) * 1991-08-30 1992-11-24 Xerox Corporation Toner concentration sensing apparatus
US6248496B1 (en) * 2000-03-07 2001-06-19 Xerox Corporation Method of replenishing developer in a hybrid scavengeless development system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2671200A (en) * 1950-10-18 1954-03-02 Jerome F Lederer Safety signal device
US3475316A (en) * 1965-06-29 1969-10-28 Sherwin Williams Co Apparatus for measurement and control of nonvolatile components in liquid coating compositions
US3418163A (en) * 1965-12-27 1968-12-24 Sperry Rand Corp Magnetoresistive magnetostriction monitoring
US3527651A (en) * 1966-10-20 1970-09-08 Addressograph Multigraph Method of and apparatus for developing electrostatic images

Also Published As

Publication number Publication date
CA978585A (en) 1975-11-25
DE2141870A1 (en) 1972-03-30
US3707134A (en) 1972-12-26
GB1367681A (en) 1974-09-18
JPS524942B1 (en) 1977-02-08
DE2141870B2 (en) 1979-06-21
FR2104578A5 (en) 1972-04-14

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