GB1533716A - Developing agent supply apparatus including a device for detecting the presence or absence of magnetic developing agent - Google Patents

Developing agent supply apparatus including a device for detecting the presence or absence of magnetic developing agent

Info

Publication number
GB1533716A
GB1533716A GB3171476A GB3171476A GB1533716A GB 1533716 A GB1533716 A GB 1533716A GB 3171476 A GB3171476 A GB 3171476A GB 3171476 A GB3171476 A GB 3171476A GB 1533716 A GB1533716 A GB 1533716A
Authority
GB
United Kingdom
Prior art keywords
developing agent
absence
container
magnetic field
supply apparatus
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
GB3171476A
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 Production Printing Holding BV
Original Assignee
Oce Van der Grinten NV
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 Oce Van der Grinten NV filed Critical Oce Van der Grinten NV
Publication of GB1533716A publication Critical patent/GB1533716A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • 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
    • G03G15/0856—Detection or control means for the developer level
    • 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
    • G03G15/0856—Detection or control means for the developer level
    • G03G15/086—Detection or control means for the developer level the level being measured by electro-magnetic means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Dry Development In Electrophotography (AREA)

Abstract

1533716 Measuring presence or absence of developing agent OCE-VAN DER GRINTEN NV 29 July 1976 [30 July 1975] 31714/76 Heading G1W The presence or absence of magnetic developing agent 2 in a supply container 1 of a developing agent supply apparatus is detected by arranging a magnet 3 and magnetic field sensing element 5 (reed switch or Hall plate) in close proximity to the bottom of the container (as shown) or to a lower part of a vertical or inclined container side wall. When developing agent 2 is present in the container, as shown, the magnetic field from magnet 3 passes through the developing agent and is of sufficient magnitude to actuate reed switch 5 whereas when the amount of agent 2 is small the magnetic field passing through switch 5 is of such a low value that the latter is de-actuated. The reed switch is connected in a lamp circuit whereby the lamp is switched on when the switch is de-actuated.
GB3171476A 1975-07-30 1976-07-29 Developing agent supply apparatus including a device for detecting the presence or absence of magnetic developing agent Expired GB1533716A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10446675U JPS5219232U (en) 1975-07-30 1975-07-30

Publications (1)

Publication Number Publication Date
GB1533716A true GB1533716A (en) 1978-11-29

Family

ID=14381352

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3171476A Expired GB1533716A (en) 1975-07-30 1976-07-29 Developing agent supply apparatus including a device for detecting the presence or absence of magnetic developing agent

Country Status (4)

Country Link
JP (1) JPS5219232U (en)
FR (1) FR2319930A1 (en)
GB (1) GB1533716A (en)
NL (1) NL7608011A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2029580B (en) * 1978-08-10 1983-06-15 Central Electr Generat Board Improvements in or relating to the collection and sensing of magnetic debris in lubricating oil and other liquids

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6036585B2 (en) * 1979-11-24 1985-08-21 株式会社日立製作所 developing device
JPS6143058Y2 (en) * 1980-06-23 1986-12-05
JPS5740822U (en) * 1980-08-19 1982-03-05
JPH0229398Y2 (en) * 1985-01-17 1990-08-07
ATE185002T1 (en) * 1995-06-07 1999-10-15 Nashua Corp APPARATUS AND METHOD FOR DISPENSING TONER AND THE LIKE

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5119350A (en) * 1974-08-07 1976-02-16 Mitsubishi Electric Corp Netsukokankino suiryoseigyosochi

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2029580B (en) * 1978-08-10 1983-06-15 Central Electr Generat Board Improvements in or relating to the collection and sensing of magnetic debris in lubricating oil and other liquids

Also Published As

Publication number Publication date
FR2319930B3 (en) 1979-06-29
NL7608011A (en) 1977-02-01
JPS5219232U (en) 1977-02-10
FR2319930A1 (en) 1977-02-25

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee