GB1271882A - Apparatus and method for monitoring and controlling the concentration of toner in a developer mix - Google Patents

Apparatus and method for monitoring and controlling the concentration of toner in a developer mix

Info

Publication number
GB1271882A
GB1271882A GB05261/70A GB1526170A GB1271882A GB 1271882 A GB1271882 A GB 1271882A GB 05261/70 A GB05261/70 A GB 05261/70A GB 1526170 A GB1526170 A GB 1526170A GB 1271882 A GB1271882 A GB 1271882A
Authority
GB
United Kingdom
Prior art keywords
toner
reservoir
toner concentration
developer
concentration
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
GB05261/70A
Inventor
Henderson Clendenin Gillespie
Ralph Herman
Milton Myron Sowiak
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.)
RCA Corp
Original Assignee
RCA 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 RCA Corp filed Critical RCA Corp
Publication of GB1271882A publication Critical patent/GB1271882A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/023—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance where the material is placed in the field of a coil
    • 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
    • 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

  • General Physics & Mathematics (AREA)
  • 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)
  • Dry Development In Electrophotography (AREA)

Abstract

1,271,882. Electro-photographic developing apparatus; automatic control of concentration. RCA CORPORATION. March 31, 1970 [March 27, 1969], No. 15261/70. Headings G2H and G3R. [Also in Division G1] Developer 12, comprising toner and magnetic or conductive carrier particles is sampled by allowing it to fall from a reservoir 50 into a tube 62 around which a coil 70 is wrapped; the inductance of coil 70, which is a function of toner concentration, being used to indicate toner concentration and/or to control toner replenishment from a reservoir 80. In one embodiment Fig. 3 (not shown) 9 circuit connected to coil 70 energizes a motor 76 for rotating a toner feed rod 82 only when toner concentration falls below a predetermined value. In another embodiment Fig. 5 (not shown) the circuit is such that motor 76 is permanently energized, but the rate of rotation of rod 82 is dependant on toner concentration. Developer is returned from tube 62 to reservoir 50 by a screw conveyer (66) Fig. 2 (not shown). Developer may be agitated by a paddle 52 and may be applied under the influence of an electrode 60 by a magnetic brush formed by rotating a brass tube 44 about a magnet 42 and a soft iron bar 48. A motor 54 for photo-conductive sheet feed rollers 20, 22 may be de-energized by the circuit if toner concentration falls so low that reservoir 80 must be empty.
GB05261/70A 1969-03-27 1970-03-31 Apparatus and method for monitoring and controlling the concentration of toner in a developer mix Expired GB1271882A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81113269A 1969-03-27 1969-03-27

Publications (1)

Publication Number Publication Date
GB1271882A true GB1271882A (en) 1972-04-26

Family

ID=25205664

Family Applications (1)

Application Number Title Priority Date Filing Date
GB05261/70A Expired GB1271882A (en) 1969-03-27 1970-03-31 Apparatus and method for monitoring and controlling the concentration of toner in a developer mix

Country Status (10)

Country Link
US (1) US3572551A (en)
JP (1) JPS4938730B1 (en)
BE (1) BE747889A (en)
CA (1) CA948276A (en)
CH (1) CH533325A (en)
DE (1) DE2014430A1 (en)
FR (1) FR2035930A1 (en)
GB (1) GB1271882A (en)
NL (1) NL7004419A (en)
SE (1) SE365625B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000295B (en) * 1977-06-10 1982-03-10 Basf Ag Method and device for determining the homogeneity of a magnetic dispersion and method of manufacturing a magnetic recording medium from such a dispersion
CN113117358A (en) * 2021-05-21 2021-07-16 天津民祥生物医药股份有限公司 A concentrated drying equipment for producing L-prolinamide

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3892672A (en) * 1970-08-21 1975-07-01 Addressograph Multigraph Automatic toner concentrate detector and control device
US3821938A (en) * 1971-12-17 1974-07-02 Ibm Toner usage sensing system
US3873002A (en) * 1973-04-16 1975-03-25 Xerox Corp Toner dispenser logic control
US3834806A (en) * 1973-05-07 1974-09-10 Xerox Corp Particle level indicator
JPS5246095B2 (en) * 1973-05-25 1977-11-21
JPS5619637B2 (en) * 1973-06-20 1981-05-08
US3893408A (en) * 1973-12-26 1975-07-08 Xerox Corp Toner dispensing system
US3999687A (en) * 1974-07-17 1976-12-28 Savin Business Machines Corporation Toner concentration detector
US3970036A (en) * 1974-07-17 1976-07-20 Savin Business Machines Corporation Toner concentration detector for dry powder magnetic brush toning system
JPS52125339A (en) * 1976-04-14 1977-10-21 Hitachi Ltd Detector for toner density
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
US4226525A (en) * 1976-10-19 1980-10-07 Ricoh Company, Ltd. Electrostatic copying machine
DE2747128C3 (en) * 1976-10-20 1980-01-24 Sharp K.K., Osaka (Japan) Test device for the amount of developer powder in an electrophotographic copier
GB1600956A (en) * 1977-02-28 1981-10-21 Ricoh Kk Methods and apparatus for detecting toner concentrations
JPS53126944A (en) * 1977-04-13 1978-11-06 Hitachi Ltd Developing device using developing powder
JPS609269B2 (en) * 1977-04-19 1985-03-08 株式会社リコー Toner concentration detection method in two-component developer
DE2727402C2 (en) * 1977-06-18 1979-04-19 Hoechst Ag, 6000 Frankfurt Device for measuring the toner concentration of a developer mixture
US4270487A (en) * 1977-10-27 1981-06-02 Hitachi, Ltd. Developer regulating device in developing apparatus
JPS6027985B2 (en) * 1977-11-07 1985-07-02 株式会社日立製作所 Developer toner concentration detection device
US4310238A (en) * 1979-09-08 1982-01-12 Ricoh Company, Ltd. Electrostatic copying apparatus
JPS6036585B2 (en) * 1979-11-24 1985-08-21 株式会社日立製作所 developing device
JPS5726879A (en) * 1980-07-23 1982-02-13 Mita Ind Co Ltd Control device for replenishing of developer
US4468112A (en) * 1981-02-18 1984-08-28 Canon Kabushiki Kaisha Developer concentration controlling device
US4357901A (en) * 1981-09-03 1982-11-09 Bunnington Corporation Method and system for magnetically sensing and controlling toner concentration and optical density of copies in electrostatic reproduction
JPS58136473A (en) * 1982-02-08 1983-08-13 Hitachi Ltd Printer
DE3363624D1 (en) * 1982-02-11 1986-07-03 Agfa Gevaert Nv Xerographic copying apparatus
DE3308066C1 (en) * 1983-03-08 1984-09-13 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Ink metering device for an ink fountain roller
JP3021619B2 (en) * 1990-11-16 2000-03-15 三洋電機株式会社 Image forming device
US5166729A (en) * 1991-08-30 1992-11-24 Xerox Corporation Toner concentration sensing apparatus
JPH09329967A (en) * 1995-11-27 1997-12-22 Fuji Xerox Co Ltd Developing device
EP0807866A1 (en) * 1996-05-17 1997-11-19 Agfa-Gevaert N.V. Electrostatographic developing device with toner dosage reservoir
CN104460267B (en) * 2013-09-20 2019-06-14 京瓷办公信息***株式会社 Developing apparatus, image forming apparatus and toner concentration detection method
JP6332231B2 (en) * 2015-10-28 2018-05-30 京セラドキュメントソリューションズ株式会社 Developing device and image forming apparatus
CN112630375B (en) * 2020-07-31 2022-03-29 南通贝得彩色印刷有限公司 Environment-friendly detection method and device for color printing device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909303A (en) * 1957-12-09 1959-10-20 Reserve Mining Co Ratio control of binder to concentrate
GB1022373A (en) * 1963-10-24 1966-03-09 Head Wrightson & Co Ltd Improvements relating to control of flow of particulate solid materials through pipes
US3399652A (en) * 1967-06-14 1968-09-03 Addressograph Multigraph Automatic toner concentrate detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000295B (en) * 1977-06-10 1982-03-10 Basf Ag Method and device for determining the homogeneity of a magnetic dispersion and method of manufacturing a magnetic recording medium from such a dispersion
CN113117358A (en) * 2021-05-21 2021-07-16 天津民祥生物医药股份有限公司 A concentrated drying equipment for producing L-prolinamide

Also Published As

Publication number Publication date
SE365625B (en) 1974-03-25
US3572551A (en) 1971-03-30
DE2014430A1 (en) 1970-10-01
BE747889A (en) 1970-08-31
JPS4938730B1 (en) 1974-10-19
FR2035930A1 (en) 1970-12-24
NL7004419A (en) 1970-09-29
CA948276A (en) 1974-05-28
CH533325A (en) 1973-01-31

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees