GB1476677A - Toner dispensing system - Google Patents

Toner dispensing system

Info

Publication number
GB1476677A
GB1476677A GB4996574A GB4996574A GB1476677A GB 1476677 A GB1476677 A GB 1476677A GB 4996574 A GB4996574 A GB 4996574A GB 4996574 A GB4996574 A GB 4996574A GB 1476677 A GB1476677 A GB 1476677A
Authority
GB
United Kingdom
Prior art keywords
sump
circuit
developing means
concentration control
toner 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
GB4996574A
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 GB1476677A publication Critical patent/GB1476677A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G03G15/0851—Detection or control means for the developer concentration the concentration being measured by electrical means

Landscapes

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

Abstract

1476677 Toner concentration control XEROX CORP 19 Nov 1974 [26 Dec 1973] 49965/74 Heading G2H A toner concentration control device comprises magnetic brush developing means 20 which collects developer from a sump 24, carries it past an electrically conductive trimmer bar 34 and in the process a circuit is completed, causing shorting, if insufficient toner particles, which are insulative, are present. A dispensing device is activated by the circuit when a given number of shorts is achieved in unit time. The time characteristics are adjustable using a variable resistor. Lifting unit 22 attracts particles from developing means 20 and returns them, via agitating baffles, to the sump 24.
GB4996574A 1973-12-26 1974-11-19 Toner dispensing system Expired GB1476677A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US428592A US3893408A (en) 1973-12-26 1973-12-26 Toner dispensing system

Publications (1)

Publication Number Publication Date
GB1476677A true GB1476677A (en) 1977-06-16

Family

ID=23699577

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4996574A Expired GB1476677A (en) 1973-12-26 1974-11-19 Toner dispensing system

Country Status (4)

Country Link
US (1) US3893408A (en)
CA (1) CA1041593A (en)
GB (1) GB1476677A (en)
NL (1) NL7415076A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2144003A (en) * 1983-07-25 1985-02-20 Belco Pollution Control Corp Power supply for electrostatic precipitator

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4200665A (en) * 1974-06-18 1980-04-29 Koichi Suzuki Method for controlling the toner concentration of a developer used in a dry type developing system
US4112867A (en) * 1974-06-18 1978-09-12 Ricoh Company, Ltd. Apparatus for controlling the toner concentration of a developer used in a dry type developing system
US3999119A (en) * 1975-03-26 1976-12-21 Xerox Corporation Measuring toner concentration
US4076857A (en) * 1976-06-28 1978-02-28 Eastman Kodak Company Process for developing electrographic images by causing electrical breakdown in the developer
JPS5349437A (en) * 1976-10-16 1978-05-04 Hitachi Ltd Toner density detector
US4190018A (en) * 1979-02-02 1980-02-26 Pitney-Bowes, Inc. Powder density control circuit for a photocopier
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

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3802381A (en) * 1968-07-30 1974-04-09 Continental Can Co Apparatus for measuring concentration ratios of a mixture of materials
US3572551A (en) * 1969-03-27 1971-03-30 Rca Corp Apparatus for monitoring and controlling the concentration of toner in a developer mix
BE757197A (en) * 1969-10-09 1971-03-16 Rca Corp DEVICE FOR MONITORING AND ADJUSTING THE CONCENTRATION OF POWDER PARTICLES IN A MIXTURE OF POWDER AND MAGNETIC PARTICLES
US3698926A (en) * 1969-11-11 1972-10-17 Katsuragawa Denki Kk Method and apparatus for supplementing toner in electrophotographic machines
US3719165A (en) * 1971-09-03 1973-03-06 Eastman Kodak Co Tuner concentration control apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2144003A (en) * 1983-07-25 1985-02-20 Belco Pollution Control Corp Power supply for electrostatic precipitator

Also Published As

Publication number Publication date
NL7415076A (en) 1975-03-27
US3893408A (en) 1975-07-08
CA1041593A (en) 1978-10-31

Similar Documents

Publication Publication Date Title
GB1271882A (en) Apparatus and method for monitoring and controlling the concentration of toner in a developer mix
GB1513989A (en) Toner concentration control in a xerographic copier
GB1476677A (en) Toner dispensing system
GB1195738A (en) Method of and Apparatus for Developing Electro-Photographic Images
GB1494727A (en) Apparatus for supply and control of dc current
ES384593A1 (en) Automatic developability control system
JPS52131729A (en) Toner concentration detection circuit
GB1398963A (en) Method of and apparatus for measuring or measuring and replacing toner consumed in an electrophotographic reproduction machine
GB1478039A (en) Control circuit used in development of electrostatic latent images and developing apparatus
KR840000824A (en) Input signal test device of electronic copy machine
EP0044752A2 (en) Dual component developing material detecting device for electrostatic copying apparatus
GB1481035A (en) Liquid developer for use in development of an electrostatic latent image
GB1480087A (en) Development apparatus
GB1438799A (en) Particle dispenser
BE812912A (en) METHOD AND DEVICE FOR DIVIDING AND CUTTING ELECTRICALLY CONDUCTING MATERIALS
GB1443286A (en) Electrophotographic copying apparatus
JPS56159653A (en) Developer for electrostatic latent image
GB1311713A (en) Multiple choice display systems
USRE27480E (en) Automatic development controller
JPS5336245A (en) Developing sleeve
US3431430A (en) Automatic electric control systems
JPS5619058A (en) Electrophotographic developer
JPS5693455A (en) Line monitor system
GB1403535A (en) Method and apparatus for developing electrostatic latent images
JPS5492258A (en) Concentration detecting device of developer in electrostatic recording apparatus

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

Effective date: 19921119