GB1291758A - Electrographic developing apparatus - Google Patents

Electrographic developing apparatus

Info

Publication number
GB1291758A
GB1291758A GB46511/70A GB4651170A GB1291758A GB 1291758 A GB1291758 A GB 1291758A GB 46511/70 A GB46511/70 A GB 46511/70A GB 4651170 A GB4651170 A GB 4651170A GB 1291758 A GB1291758 A GB 1291758A
Authority
GB
United Kingdom
Prior art keywords
motor
current
toner
cylinder
stationary magnet
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
GB46511/70A
Inventor
Robert Aaron Rubenstein
James Conrad Schopp
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.)
RCA Corp
Original Assignee
RCA 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 RCA Corp filed Critical RCA Corp
Publication of GB1291758A publication Critical patent/GB1291758A/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
    • G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
    • 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
    • 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
    • G03G15/0853—Detection or control means for the developer concentration the concentration being measured by magnetic means
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S222/00—Dispensing
    • Y10S222/01—Xerography

Landscapes

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

Abstract

1291758 Electro-physical measurements R C A CORPORATION 30 Sept 1970 [9 Oct 1969] 46511/70 Heading G1N [Also in Division G2-3] A magnetic brush arrangement comprising a stationary magnet 30 and rotary cylinder 32 spaced from a stationary magnet 54 applies toner particles to an image bearing web 16, and a doctor blade 56 removes magnetic carrier particles and excess toner from the cylinder 32. The current drawn by constant speed motor 47 driving cylinder 32 is used as an indication of the force on the magnetic brush 28 and on the scraper blade 56. As the force increases (i.e. as toner is removed) motor 47 has to draw more current to maintain its speed. A meter relay 103 closes a switch 105 to energize lamp 60 and motor 90 when the current reaches a predetermined value. If the current increases above this value, indicating that hopper 96 is empty, relay 103 switches off motor 47.
GB46511/70A 1969-10-09 1970-09-30 Electrographic developing apparatus Expired GB1291758A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86507669A 1969-10-09 1969-10-09

Publications (1)

Publication Number Publication Date
GB1291758A true GB1291758A (en) 1972-10-04

Family

ID=25344655

Family Applications (1)

Application Number Title Priority Date Filing Date
GB46511/70A Expired GB1291758A (en) 1969-10-09 1970-09-30 Electrographic developing apparatus

Country Status (9)

Country Link
US (1) US3587521A (en)
JP (1) JPS508940B1 (en)
BE (1) BE757197A (en)
CH (1) CH530040A (en)
DE (1) DE2049062A1 (en)
FR (1) FR2065142A5 (en)
GB (1) GB1291758A (en)
NL (1) NL7014778A (en)
SE (1) SE359661B (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3821938A (en) * 1971-12-17 1974-07-02 Ibm Toner usage sensing system
JPS5246095B2 (en) * 1973-05-25 1977-11-21
JPS5619637B2 (en) * 1973-06-20 1981-05-08
US3893408A (en) * 1973-12-26 1975-07-08 Xerox Corp Toner dispensing system
JPS613004Y2 (en) * 1975-01-13 1986-01-30
US4032227A (en) * 1976-01-15 1977-06-28 International Business Machines Corporation Toner concentration control apparatus
JPS52131729A (en) * 1976-04-28 1977-11-04 Ricoh Co Ltd Toner concentration detection circuit
DE2621912C3 (en) * 1976-05-17 1979-06-07 Elfotec Ag, Zumikon (Schweiz) Process for developing an electric charge image on a reusable charge image carrier and for cleaning the reusable charge image carrier
JPS56121068A (en) * 1980-02-27 1981-09-22 Mita Ind Co Ltd Developing device of electrostatic copying machine
GB2105222B (en) * 1981-07-10 1985-08-07 Konishiroku Photo Ind Developing apparatus
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
JPS63322U (en) * 1986-06-17 1988-01-05
US4838673A (en) * 1987-04-27 1989-06-13 J. R. Richards, Inc. Polarized lens and method of making the same
JPH0360316U (en) * 1989-10-19 1991-06-13
JPH0362318U (en) * 1989-10-19 1991-06-18
DE102008011589B3 (en) * 2008-02-28 2009-04-09 Metabowerke Gmbh Electric hand tool with magnets to absorb dust
CN112388691B (en) * 2020-10-22 2022-10-14 淮北联诚网络科技有限公司 Atractylodes macrocephala cutting device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956487A (en) * 1955-03-23 1960-10-18 Rca Corp Electrostatic printing

Also Published As

Publication number Publication date
BE757197A (en) 1971-03-16
CH530040A (en) 1972-10-31
DE2049062A1 (en) 1971-04-15
FR2065142A5 (en) 1971-07-23
US3587521A (en) 1971-06-28
SE359661B (en) 1973-09-03
JPS508940B1 (en) 1975-04-08
NL7014778A (en) 1971-04-14

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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