GB1195738A - Method of and Apparatus for Developing Electro-Photographic Images - Google Patents

Method of and Apparatus for Developing Electro-Photographic Images

Info

Publication number
GB1195738A
GB1195738A GB46836/67A GB4683667A GB1195738A GB 1195738 A GB1195738 A GB 1195738A GB 46836/67 A GB46836/67 A GB 46836/67A GB 4683667 A GB4683667 A GB 4683667A GB 1195738 A GB1195738 A GB 1195738A
Authority
GB
United Kingdom
Prior art keywords
mixture
thyratron
resistance
toner
oct
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
GB46836/67A
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.)
AB Dick Co
Original Assignee
Multigraphics 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 Multigraphics Inc filed Critical Multigraphics Inc
Publication of GB1195738A publication Critical patent/GB1195738A/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
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/043—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a granular material
    • 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

Abstract

1,195,738. Developing electrostatic images; automatic mixture control. ADDRESSOGRAPH - MULTIGRAPH CORP. Oct.13, 1967 [Oct.20, 1966] No.46836/67. Headings G2H and G3R. Toner is added to a developer mix in response to the electrical resistance of the mixture sensed by a control circuit 12 having a thyratron 42 which energizes the winding 36A of a solenoid 36. The resistance of the mixture, which comprises carrier particles, e.g., iron and a pigmented resin, is sensed by an electrode 40 spaced from a drum 20 carrying a magnetic brush 24 formed of developer. The electrode 40 is connected to the grid of the thyratron, such that when the resistance of the mixture is decreased due to depletion of toner in the mixture the thyratron conducts to energize winding 36A. The solenoid 36 vibrates a feed trough (34) Fig.3 (not shown) to dispense from a supply 28.
GB46836/67A 1966-10-20 1967-10-13 Method of and Apparatus for Developing Electro-Photographic Images Expired GB1195738A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US58820966A 1966-10-20 1966-10-20

Publications (1)

Publication Number Publication Date
GB1195738A true GB1195738A (en) 1970-06-24

Family

ID=24352931

Family Applications (1)

Application Number Title Priority Date Filing Date
GB46836/67A Expired GB1195738A (en) 1966-10-20 1967-10-13 Method of and Apparatus for Developing Electro-Photographic Images

Country Status (3)

Country Link
US (1) US3527651A (en)
DE (1) DE1597805A1 (en)
GB (1) GB1195738A (en)

Families Citing this family (20)

* 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
US3677222A (en) * 1969-02-24 1972-07-18 Canon Kk Device for automatically regulating the concentration of developing solution
US3659556A (en) * 1970-08-19 1972-05-02 Xerox Corp Programmable toner dispenser
US3707134A (en) * 1970-08-21 1972-12-26 Addressograph Multigraph Automatic toner concentrate detector and control device
US3892672A (en) * 1970-08-21 1975-07-01 Addressograph Multigraph Automatic toner concentrate detector and control device
US3719165A (en) * 1971-09-03 1973-03-06 Eastman Kodak Co Tuner concentration control apparatus
US3821938A (en) * 1971-12-17 1974-07-02 Ibm Toner usage sensing system
JPS5619637B2 (en) * 1973-06-20 1981-05-08
JPS5166835A (en) * 1974-12-06 1976-06-09 Konishiroku Photo Ind SEIDENKIROKUHONIOKERU TONAAHOKYUSEIGYOHOHO
JPS613004Y2 (en) * 1975-01-13 1986-01-30
JPS5913027B2 (en) * 1975-11-26 1984-03-27 株式会社リコー Fukushimai Fukushiyahouhou
JPS52125339A (en) * 1976-04-14 1977-10-21 Hitachi Ltd Detector for toner density
JPS6044653B2 (en) * 1976-05-17 1985-10-04 株式会社リコー Developing bias automatic control method and device
US4108545A (en) * 1976-12-20 1978-08-22 Pitney-Bowes, Inc. Developer supply control system in a copier
JPS5596967A (en) * 1979-01-19 1980-07-23 Ricoh Co Ltd Developer laminar state detector
JPS5643556A (en) * 1979-09-19 1981-04-22 Toshiba Corp Concentration control device of developer
US4343548A (en) * 1980-05-19 1982-08-10 Xerox Corporation Control system for regulating the concentration of toner particles within a developer mixture
US4324812A (en) * 1980-05-29 1982-04-13 Ransburg Corporation Method for controlling the flow of coating material
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
US4931835A (en) * 1988-11-14 1990-06-05 Eastman Kodak Company Apparatus for monitoring developer mixture

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1717193A (en) * 1924-04-18 1929-06-11 Gen Electric Resistance element and method of making the same
US2956487A (en) * 1955-03-23 1960-10-18 Rca Corp Electrostatic printing
US3094049A (en) * 1961-02-03 1963-06-18 Xerox Corp Xerographic developer measuring apparatus
US3233781A (en) * 1963-05-08 1966-02-08 Savin Business Machines Corp Toner control system
US3387586A (en) * 1966-06-06 1968-06-11 Addressograph Multigraph Magnetic developer apparatus
US3376853A (en) * 1966-04-29 1968-04-09 Xerox Corp Electrostatic toner control
US3376854A (en) * 1966-06-01 1968-04-09 Xerox Corp Automatic toner dispensing control

Also Published As

Publication number Publication date
US3527651A (en) 1970-09-08
DE1597805A1 (en) 1970-06-18

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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