GB1372999A - Electrostatic copying machine - Google Patents

Electrostatic copying machine

Info

Publication number
GB1372999A
GB1372999A GB5045772A GB5045772A GB1372999A GB 1372999 A GB1372999 A GB 1372999A GB 5045772 A GB5045772 A GB 5045772A GB 5045772 A GB5045772 A GB 5045772A GB 1372999 A GB1372999 A GB 1372999A
Authority
GB
United Kingdom
Prior art keywords
lead
charge
toner
motor
supply
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
GB5045772A
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1372999A publication Critical patent/GB1372999A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D7/00—Control of flow
    • G05D7/06—Control of flow characterised by the use of electric means
    • G05D7/0605—Control of flow characterised by the use of electric means specially adapted for solid materials
    • 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
    • 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
    • G03G15/0887—Arrangements for conveying and conditioning developer in the developing unit, e.g. agitating, removing impurities or humidity
    • G03G15/0891—Arrangements for conveying and conditioning developer in the developing unit, e.g. agitating, removing impurities or humidity for conveying or circulating developer, e.g. augers
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/06—Developing structures, details
    • G03G2215/0634—Developing device
    • G03G2215/0636—Specific type of dry developer device

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)

Abstract

1372999 Developing apparatus INTERNATIONAL BUSINESS MACHINES CORP 2 Nov 1972 [17 Dec 1971] 50457/72 Heading G2H In an electro-photographic apparatus depletion of toner in the toner supply 33 is monitored by measuring the loss of electrical charge from the supply. The developer station 19 is earthed through lead 57 such that as charge is removed from the supply 33 with the removal of toner an equal charge returns to the developer through lead 57. The current in lead 57 is integrated by amplifier 59 and a charge builds up on capacitor 61. When the charge reaches a predetermined level a level detector 63 initiates a timer 65 which provides a gating signal to drive a motor 67 for a pre-set time. Motor 67 rotates a dispenser member 69. In an alternative embodiment the current in lead 57 passes through a resistor and the toner replenishing means includes a direct current motor connected across the resistor so that the angle through which the motor rotates the dispenser is proportional to the integral of the current flowing in lead 57.
GB5045772A 1971-12-17 1972-11-02 Electrostatic copying machine Expired GB1372999A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00209040A US3821938A (en) 1971-12-17 1971-12-17 Toner usage sensing system

Publications (1)

Publication Number Publication Date
GB1372999A true GB1372999A (en) 1974-11-06

Family

ID=22777076

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5045772A Expired GB1372999A (en) 1971-12-17 1972-11-02 Electrostatic copying machine

Country Status (14)

Country Link
US (1) US3821938A (en)
JP (1) JPS4869528A (en)
AR (1) AR205242A1 (en)
AU (1) AU4874172A (en)
BR (1) BR7208877D0 (en)
CA (1) CA1010493A (en)
CH (1) CH539870A (en)
DE (1) DE2254883A1 (en)
ES (1) ES409699A1 (en)
FR (1) FR2165442A5 (en)
GB (1) GB1372999A (en)
IT (1) IT967830B (en)
NL (1) NL7215310A (en)
SE (1) SE375634B (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5619637B2 (en) * 1973-06-20 1981-05-08
JPS613004Y2 (en) * 1975-01-13 1986-01-30
US4026643A (en) * 1975-08-22 1977-05-31 Xerox Corporation Apparatus and method for measurement of the ratio of toner particle electrostatic charge to toner particle mass in electrostatographic devices
JPS52131729A (en) * 1976-04-28 1977-11-04 Ricoh Co Ltd Toner concentration detection circuit
US4064834A (en) * 1976-11-19 1977-12-27 A. B. Dick Company Apparatus for sensing the concentration of toner in a developer mix
US4163787A (en) 1977-03-14 1979-08-07 The Dow Chemical Company Substituted pyridine methyl esters of cyclopropane carboxylic acids and their use as insecticides
JPS5437758A (en) * 1977-08-30 1979-03-20 Ricoh Co Ltd Electrostatic latent image developing method
US4343548A (en) * 1980-05-19 1982-08-10 Xerox Corporation Control system for regulating the concentration of toner particles within a developer mixture
US4524088A (en) * 1983-01-31 1985-06-18 Magnetic Technologies Corp. Method and apparatus for controlling the thickness of developer on an applicator, such as a magnetic brush, in electrostatic reproduction
US4492179A (en) * 1983-06-16 1985-01-08 Xerox Corporation Control system for regulating the dispensing of marking particles in an electrophotographic printing machine
US4972230A (en) * 1989-10-31 1990-11-20 Xerox Corporation Toner usage detector based on current biasing mixing means
US5006897A (en) * 1990-07-02 1991-04-09 Eastman Kodak Company Determination of charge-to-mass ratio
US5459556A (en) * 1994-01-12 1995-10-17 Xerox Corporation Toner consumption rate gauge for printers and copiers
JP3269949B2 (en) * 1995-10-03 2002-04-02 京セラミタ株式会社 Method for measuring toner concentration and charge amount in two-component developer
JP3199993B2 (en) * 1995-10-23 2001-08-20 シャープ株式会社 Developer charge amount measuring device
FR2764374B1 (en) * 1997-06-10 1999-08-06 Stolz Sequipag DEVICE FOR CONTROLLING THE FLOW OF A PRODUCT CONTAINED IN AN ENCLOSURE
US6248496B1 (en) * 2000-03-07 2001-06-19 Xerox Corporation Method of replenishing developer in a hybrid scavengeless development system
US7585921B2 (en) * 2001-12-14 2009-09-08 Sanyo Chemical Industries, Ltd. Resin for toner binder and toner composition
US7546048B2 (en) * 2006-01-12 2009-06-09 Sun Chemical Corporation Method for determining ink usage efficiency in commercial printing processes using pigments and quantitative tests
US8155540B2 (en) * 2010-06-02 2012-04-10 Xerox Corporation Optimized limit gain compensation for dispense time accumulators of toner concentration control

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3527651A (en) * 1966-10-20 1970-09-08 Addressograph Multigraph Method of and apparatus for developing electrostatic images
US3553464A (en) * 1967-03-27 1971-01-05 Ricoh Kk Device for detecting the density of developer in an electrostatographic duplicator
US3399652A (en) * 1967-06-14 1968-09-03 Addressograph Multigraph Automatic toner concentrate detector
US3682132A (en) * 1969-03-03 1972-08-08 Xerox Corp Automatic developer controller
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
US3654893A (en) * 1970-05-01 1972-04-11 Eastman Kodak Co Automatic bias control for electrostatic development
US3674532A (en) * 1970-07-23 1972-07-04 Eastman Kodak Co Control for bias of magnetic brush and method
US3707134A (en) * 1970-08-21 1972-12-26 Addressograph Multigraph Automatic toner concentrate detector and control device
US3678896A (en) * 1971-01-28 1972-07-25 Xerox Corp Conveyor system
US3674353A (en) * 1971-07-01 1972-07-04 Eastman Kodak Co Toner concentration control apparatus
AU467941B2 (en) * 1971-09-25 1975-12-18 Hoechst Aktiengesellschaft Method of and apparatus for measuring or measuring and replacing toner consumed inan electrophotographic reproduction machine

Also Published As

Publication number Publication date
AU4874172A (en) 1974-05-16
SE375634B (en) 1975-04-21
NL7215310A (en) 1973-06-19
BR7208877D0 (en) 1974-01-03
IT967830B (en) 1974-03-11
JPS4869528A (en) 1973-09-21
CH539870A (en) 1973-07-31
ES409699A1 (en) 1975-12-16
FR2165442A5 (en) 1973-08-03
AR205242A1 (en) 1976-04-21
US3821938A (en) 1974-07-02
DE2254883A1 (en) 1973-06-28
CA1010493A (en) 1977-05-17

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Publication Publication Date Title
GB1372999A (en) Electrostatic copying machine
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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee