GB1181575A - Liquid Level Indicator Means for Electrophotographic Copying Apparatus. - Google Patents

Liquid Level Indicator Means for Electrophotographic Copying Apparatus.

Info

Publication number
GB1181575A
GB1181575A GB25167/67A GB2516767A GB1181575A GB 1181575 A GB1181575 A GB 1181575A GB 25167/67 A GB25167/67 A GB 25167/67A GB 2516767 A GB2516767 A GB 2516767A GB 1181575 A GB1181575 A GB 1181575A
Authority
GB
United Kingdom
Prior art keywords
light
liquid level
toner
container
containers
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
GB25167/67A
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.)
Pitney Bowes Inc
Original Assignee
Pitney Bowes 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 Pitney Bowes Inc filed Critical Pitney Bowes Inc
Publication of GB1181575A publication Critical patent/GB1181575A/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
    • G01F23/28—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 by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
    • G01F23/284—Electromagnetic waves
    • G01F23/292—Light, e.g. infrared or ultraviolet
    • G01F23/2921—Light, e.g. infrared or ultraviolet for discrete levels
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Wet Developing In Electrophotography (AREA)

Abstract

1,181,575. Liquid level indication. PITNEYBOWES Inc. May 31, 1967 [May 31, 1966], No.25167/67. Heading G1H. [Also in Division G2] A light source 28 is placed between two adjacent light-transmitting containers 16, 22, of liquid toner and toner intensifier for replenishing a developing tank 12 in an electro-photographic apparatus, such that when the liquid level in either container reaches a predetermined low-level, the light from the source, unimpeded by the presence of the toner or intensifier, can shine through the container on to a light receiving means 30, 36, to provide a signal outside the body of the apparatus. The light recipient means may be light guides 30, 36 having lower inclined faces 32, 38, for reflecting the light to the upper visible end. Where the predetermined low-levels of the containers are different, a light baffle prevents direct transmission through the upper part of the container with the lower low-level. The light-transmitting containers may be transparent or translucent e.g. of polypropylene.
GB25167/67A 1966-05-31 1967-05-31 Liquid Level Indicator Means for Electrophotographic Copying Apparatus. Expired GB1181575A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US55418366A 1966-05-31 1966-05-31

Publications (1)

Publication Number Publication Date
GB1181575A true GB1181575A (en) 1970-02-18

Family

ID=24212354

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25167/67A Expired GB1181575A (en) 1966-05-31 1967-05-31 Liquid Level Indicator Means for Electrophotographic Copying Apparatus.

Country Status (6)

Country Link
US (1) US3468604A (en)
CH (1) CH461274A (en)
DE (1) DE1572356A1 (en)
FR (1) FR1531708A (en)
GB (1) GB1181575A (en)
SE (1) SE331949B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890721A (en) * 1972-12-26 1975-06-24 Canon Kk Developing liquid recovery device in a copying machine
US5161411A (en) * 1991-10-02 1992-11-10 Bindicator Company Material level indication
US5975352A (en) * 1997-08-28 1999-11-02 Ecolab Inc. Dispenser
KR20000040187A (en) * 1998-12-17 2000-07-05 윤종용 Apparatus for measuring reservoir level of liquid reservoired in container

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1955315A (en) * 1934-04-17 photosensitive devics x
US1928235A (en) * 1930-10-07 1933-09-26 Hughes Ind Co Ltd Apparatus for treating films
US2056584A (en) * 1935-03-27 1936-10-06 Bruning Charles Co Inc Apparatus for developing prints
US3120125A (en) * 1960-08-03 1964-02-04 American Pyrotector Inc Liquid level determining devices and method
US3094214A (en) * 1961-05-05 1963-06-18 Industrial Automation Corp Automatic container fill-height inspection machine
US3354802A (en) * 1964-07-22 1967-11-28 Savin Business Machines Corp Toner monitoring system for electrostatic copier

Also Published As

Publication number Publication date
US3468604A (en) 1969-09-23
SE331949B (en) 1971-01-18
DE1572356A1 (en) 1970-02-12
CH461274A (en) 1968-08-15
FR1531708A (en) 1968-07-05

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