CA978585A - Automatic toner concentrate detector and control device - Google Patents

Automatic toner concentrate detector and control device

Info

Publication number
CA978585A
CA978585A CA121,046A CA121046A CA978585A CA 978585 A CA978585 A CA 978585A CA 121046 A CA121046 A CA 121046A CA 978585 A CA978585 A CA 978585A
Authority
CA
Canada
Prior art keywords
control device
toner concentrate
automatic toner
detector
concentrate detector
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
CA121,046A
Other languages
English (en)
Other versions
CA121046S (en
Inventor
Stanley A. Gawron
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.)
AB Dick Co
Original Assignee
Multigraphics 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 Multigraphics Inc filed Critical Multigraphics Inc
Application granted granted Critical
Publication of CA978585A publication Critical patent/CA978585A/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
    • 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

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Dry Development In Electrophotography (AREA)
CA121,046A 1970-08-21 1971-08-20 Automatic toner concentrate detector and control device Expired CA978585A (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
CA978585A true CA978585A (en) 1975-11-25

Family

ID=22065914

Family Applications (1)

Application Number Title Priority Date Filing Date
CA121,046A Expired CA978585A (en) 1970-08-21 1971-08-20 Automatic toner concentrate detector and control device

Country Status (7)

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

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 (enExample) * 1973-05-25 1977-11-21
JPS5619637B2 (enExample) * 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 (de) * 1980-12-19 1982-09-02 Minolta Camera K.K., Osaka Verfahren zum steuern der tonerkonzentration fuer elektrofotografische kopiergeraete
US4486090A (en) * 1983-03-21 1984-12-04 Minnesota Mining And Manufacturing Company Copy machine with unauthorized copy prevention
JPS60229074A (ja) * 1984-04-27 1985-11-14 Toshiba Corp トナ−濃度検出装置
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
BE771604A (fr) 1971-12-31
US3707134A (en) 1972-12-26
DE2141870A1 (de) 1972-03-30
FR2104578A5 (enExample) 1972-04-14
JPS524942B1 (enExample) 1977-02-08
GB1367681A (en) 1974-09-18
DE2141870B2 (de) 1979-06-21

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