GB1293586A - Electrophotographic developing apparatus - Google Patents

Electrophotographic developing apparatus

Info

Publication number
GB1293586A
GB1293586A GB5424669A GB5424669A GB1293586A GB 1293586 A GB1293586 A GB 1293586A GB 5424669 A GB5424669 A GB 5424669A GB 5424669 A GB5424669 A GB 5424669A GB 1293586 A GB1293586 A GB 1293586A
Authority
GB
United Kingdom
Prior art keywords
vessel
liquid
concentration
developing apparatus
nov
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
GB5424669A
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Publication of GB1293586A publication Critical patent/GB1293586A/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
    • 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
    • G03G15/10—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer
    • G03G15/104—Preparing, mixing, transporting or dispensing developer
    • G03G15/105—Detection or control means for the toner concentration
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2496—Self-proportioning or correlating systems
    • Y10T137/2499—Mixture condition maintaining or sensing
    • Y10T137/2509—By optical or chemical property

Abstract

1293586 Electro-photographic developing apparatus; automatic concentration control CANON K K 5 Nov 1969 [5 Nov 1968] 54246/69 Headings G2H and G3R A pump 3 circulates liquid developer between a reservoir 1, a developing trough 8 and a vessel 9; toner concentrate being siphoned from a container 19 to vessel 9 when the concentration of the liquid falls. As shown, when concentration falls, a detector comprising a lamp 11 and photoconductor 12 energizes an electromagnetic 14 via a transistor circuit, Fig.2 (not shown). This opens a valve 17 to divert incoming liquid down a pipe 18, and closes a duct 16 so that liquid discharged through a pipe 10 produces a negative pressure in vessel 9 which siphons toner concentrate from container 19.
GB5424669A 1968-11-05 1969-11-05 Electrophotographic developing apparatus Expired GB1293586A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8077968A JPS51453B1 (en) 1968-11-05 1968-11-05

Publications (1)

Publication Number Publication Date
GB1293586A true GB1293586A (en) 1972-10-18

Family

ID=13727912

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5424669A Expired GB1293586A (en) 1968-11-05 1969-11-05 Electrophotographic developing apparatus

Country Status (4)

Country Link
US (1) US3650196A (en)
JP (1) JPS51453B1 (en)
DE (1) DE1955684C3 (en)
GB (1) GB1293586A (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3789794A (en) * 1971-12-27 1974-02-05 Savin Business Machines Corp Apparatus for developing electrostatic images
DE2219110C3 (en) * 1972-04-19 1975-10-16 Agfa-Gevaert Ag, 5090 Leverkusen Apparatus for the wet treatment of photographic substrates
US3947856A (en) * 1973-02-17 1976-03-30 Agfa-Gevaert Ag Equipment for controlling the supply of fresh liquid in liquid treatment of photographic emulsion carriers
US4110029A (en) * 1973-09-27 1978-08-29 Canon Kabushiki Kaisha Liquid developer for an electrostatic copying device
DE2363757C2 (en) * 1973-12-21 1983-07-14 Hoechst Ag, 6230 Frankfurt Method and device for replenishing developer medium
US4025938A (en) * 1974-05-17 1977-05-24 Sharp Kabushiki Kaisha Liquid developer reservoir for copying machine
CH601505A5 (en) * 1975-06-03 1978-07-14 Siemens Ag
JPS5280845A (en) * 1975-12-27 1977-07-06 Canon Inc Electrophotographic copier
FR2556854B1 (en) * 1983-12-16 1987-02-20 Benson Sa SUPPLY PLANT AND STORAGE DEVICE FOR SUPPLYING AN ELECTROSTATIC PRINTING APPARATUS WITH A LIQUID VEHICLE DEVELOPMENT PRODUCT
US4660152A (en) * 1984-06-18 1987-04-21 Xerox Corporation System and method for monitoring and maintaining concentrate material in a fluid carrier
US5489961A (en) * 1993-04-02 1996-02-06 Burbury; Robert L. Chemical developer sensing system for film processors
US5396316A (en) * 1993-10-20 1995-03-07 Hewlett-Packard Company User-replaceable liquid toner cartridge with integral pump and valve mechanisms
US5446516A (en) * 1994-02-23 1995-08-29 Fischer Industries, Inc. Replenisher system for x-ray film processor
JPH11198398A (en) * 1998-01-13 1999-07-27 Nec Niigata Ltd Toner density sensor, ink jet head employing it, developer and image forming apparatus
JP2001092261A (en) * 1999-09-21 2001-04-06 Toshiba Tec Corp Image-forming device and developer supply unit
US7756449B2 (en) * 2007-07-27 2010-07-13 Hewlett-Packard Development Company, L.P. Electrophotographic printing apparatus and methods in which carrier medium is extracted from unused ink

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381662A (en) * 1962-11-27 1968-05-07 Harris Intertype Corp Electrophotographic micro-copy printer
US3282177A (en) * 1964-02-24 1966-11-01 Harris Intertype Corp Electrophotographic apparatus
US3354802A (en) * 1964-07-22 1967-11-28 Savin Business Machines Corp Toner monitoring system for electrostatic copier
US3369524A (en) * 1964-08-28 1968-02-20 Lumoprint Zindler Kg Copying device for electro-photographic copying materials
US3494328A (en) * 1966-09-01 1970-02-10 Addressograph Multigraph Liquid photoelectrostatic developer unit

Also Published As

Publication number Publication date
DE1955684C3 (en) 1979-05-23
DE1955684A1 (en) 1970-05-21
DE1955684B2 (en) 1978-09-21
JPS51453B1 (en) 1976-01-08
US3650196A (en) 1972-03-21

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years