GB1411448A - Control of electrostatic development apparatus - Google Patents

Control of electrostatic development apparatus

Info

Publication number
GB1411448A
GB1411448A GB5837772A GB5837772A GB1411448A GB 1411448 A GB1411448 A GB 1411448A GB 5837772 A GB5837772 A GB 5837772A GB 5837772 A GB5837772 A GB 5837772A GB 1411448 A GB1411448 A GB 1411448A
Authority
GB
United Kingdom
Prior art keywords
toner
latent image
colour
electrode
control
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
GB5837772A
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 GB1411448A publication Critical patent/GB1411448A/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
    • G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • G03G15/0105—Details of unit
    • G03G15/0126—Details of unit using a solid developer
    • 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
    • G03G15/0855—Detection or control means for the developer concentration the concentration being measured by optical 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
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5033—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the photoconductor characteristics, e.g. temperature, or the characteristics of an image on the photoconductor
    • G03G15/5041—Detecting a toner image, e.g. density, toner coverage, using a test patch

Abstract

1411448 Electro-photography; automatic control of concentration XEROX CORP 18 Dec 1972 [28 Dec 1971] 58377/72 Headings G2H and G3R The intensity of a toner image, formed by powder applied by an electrostatic developing apparatus to a latent image on a rotating photoconductive drum 10, is monitored by measurement of light passing through a transparent electrode 36. The electrode is biased to a voltage representative of the latent image, receives toner from the same magnetic brush apparatus as the latent image and, as the electrode passes a photo-sensor is illuminated from within the drum. Comparison of the response of the photo-sensor with a reference gives a measure of whether the content of toner in the toner/ carrier developer used should be adjusted, and can be made to control the addition of toner. The comparison can be repeated for each of the coloured toners applied to colour separation images, and adjustment of their various references can be made to change the colour balance of colour images produced on copy sheets 45.
GB5837772A 1971-12-28 1972-12-18 Control of electrostatic development apparatus Expired GB1411448A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US21305671A 1971-12-28 1971-12-28

Publications (1)

Publication Number Publication Date
GB1411448A true GB1411448A (en) 1975-10-22

Family

ID=22793573

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5837772A Expired GB1411448A (en) 1971-12-28 1972-12-18 Control of electrostatic development apparatus

Country Status (18)

Country Link
US (1) US3754821A (en)
JP (1) JPS543735B2 (en)
AR (1) AR195188A1 (en)
AU (1) AU467463B2 (en)
BE (1) BE793425A (en)
BR (1) BR7208611D0 (en)
CA (1) CA1004725A (en)
CH (1) CH552838A (en)
DE (1) DE2247063C3 (en)
ES (1) ES410096A1 (en)
FR (1) FR2167155A5 (en)
GB (1) GB1411448A (en)
IL (1) IL41128A0 (en)
IT (1) IT972845B (en)
NL (1) NL7215213A (en)
SE (1) SE378145B (en)
SU (1) SU619123A3 (en)
ZA (1) ZA729030B (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936176A (en) * 1973-07-19 1976-02-03 Xerox Corporation Device for maintaining a developability regulating apparatus contaminant free
US3926338A (en) * 1973-11-05 1975-12-16 Xerox Corp Thermally insensitive particle concentration controller
US3873197A (en) * 1973-11-15 1975-03-25 Xerox Corp Apparatus for regulating the toner concentration in a electrophotographic device
JPS50119639A (en) * 1974-03-01 1975-09-19
US4065031A (en) * 1976-07-23 1977-12-27 Xerox Corporation Programmable development control system
JPS5438131A (en) * 1977-09-01 1979-03-22 Olympus Optical Co Ltd Toner concentration detecting method of dry type two component developer
US4318610A (en) * 1980-04-21 1982-03-09 Xerox Corporation Control system for an electrophotographic printing machine
JPS56128964A (en) * 1980-12-12 1981-10-08 Konishiroku Photo Ind Co Ltd Copy-density control and paper jam detection device
JPS6073645A (en) * 1983-09-30 1985-04-25 Fujitsu Ltd Polychromatic printer
JPS6120062A (en) * 1984-07-06 1986-01-28 Konishiroku Photo Ind Co Ltd Image recording device
JPS62127779A (en) * 1985-11-28 1987-06-10 Mita Ind Co Ltd Toner concentration detecting device
US4671646A (en) * 1986-02-04 1987-06-09 Eastman Kodak Company Toner monitor control mechanism
JPH0786718B2 (en) * 1989-03-10 1995-09-20 三田工業株式会社 Method and apparatus for detecting concentration of photosensitive toner
US4974024A (en) * 1989-07-03 1990-11-27 Xerox Corporation Predictive toner dispenser controller
US5122842A (en) * 1991-01-02 1992-06-16 Eastman Kodak Company Color electrostatography process control by way of toner development characteristics
US5486901A (en) * 1992-03-10 1996-01-23 Konica Corporation Color image recording apparatus with a detector to detect a superimposed toner image density and correcting its color balance
US5613174A (en) * 1995-10-06 1997-03-18 Xerox Corporation Imaging device with positive air pressure and electrostatic precipitator
US20100074083A1 (en) 2006-10-17 2010-03-25 Mitsui Chemicals, Inc. Resin composition and molded product obtained by molding the resin composition

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3467468A (en) * 1967-03-30 1969-09-16 Rca Corp Automatic color electrophotographic apparatus
US3526338A (en) * 1968-01-02 1970-09-01 Xerox Corp Method and controller for dispensing electroscopic material
US3430606A (en) * 1968-01-02 1969-03-04 Xerox Corp Electroscopic particle sensor
US3644035A (en) * 1969-11-14 1972-02-22 Xerox Corp Flat plate traveling roller imaging system
US3601484A (en) * 1970-06-19 1971-08-24 Minnesota Mining & Mfg Color copying apparatus
JPS52458B2 (en) * 1972-06-08 1977-01-07

Also Published As

Publication number Publication date
ES410096A1 (en) 1976-03-16
FR2167155A5 (en) 1973-08-17
IL41128A0 (en) 1973-02-28
IT972845B (en) 1974-05-31
SU619123A3 (en) 1978-08-05
BE793425A (en) 1973-06-28
AU5057072A (en) 1974-07-04
AR195188A1 (en) 1973-09-19
US3754821A (en) 1973-08-28
JPS4874850A (en) 1973-10-09
DE2247063C3 (en) 1979-02-01
DE2247063A1 (en) 1973-07-12
BR7208611D0 (en) 1973-09-13
DE2247063B2 (en) 1978-05-11
CH552838A (en) 1974-08-15
ZA729030B (en) 1973-10-31
JPS543735B2 (en) 1979-02-26
CA1004725A (en) 1977-02-01
NL7215213A (en) 1973-07-02
AU467463B2 (en) 1974-07-04
SE378145B (en) 1975-08-18

Similar Documents

Publication Publication Date Title
GB1411448A (en) Control of electrostatic development apparatus
GB1442234A (en) Xerographic copying machines
GB1033419A (en) Electrophotographic and like recording processes
GB1465556A (en) Method of testing a multi-colour electrophotographic printing machine
GB1472181A (en) Electrophotography
GB1475577A (en) Particle concentration detector
GB1449180A (en) Electrostatographic imaging apparatus
GB1398963A (en) Method of and apparatus for measuring or measuring and replacing toner consumed in an electrophotographic reproduction machine
US3778146A (en) Illuminating apparatus
GB1447925A (en) Electrostatic copying machine
GB1469159A (en) Electrophotographic apparatus
SE7411072L (en) ELECTROPHOTOGRAPHIC FERG PRINTING APPARATUS
GB1481035A (en) Liquid developer for use in development of an electrostatic latent image
GB1443667A (en) Magnetic brush type developing mechanism for an electrophoto graphic copying machine
JPS57147655A (en) Bicolor developing method
US3825337A (en) Color balance display
GB1386019A (en) Electro-photographic copying methods
US3817616A (en) Thermal chamber for a developability regulating apparatus
GB1453133A (en) Method of and apparatus for duplicating photographic images
US3779203A (en) Toner concentration control apparatus
GB1460998A (en) Transfer regulating apparatus for electrophotographic machines
JPS5412739A (en) Two color electrophotographic copying method
JPS53110846A (en) Dry type developing device of electrophotographic copier
JPS56167156A (en) Simultaneous copying method for normal character and braille type
JPS55144265A (en) Developing method for electrostatic latent image

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