GB1271882A - Apparatus and method for monitoring and controlling the concentration of toner in a developer mix - Google Patents
Apparatus and method for monitoring and controlling the concentration of toner in a developer mixInfo
- Publication number
- GB1271882A GB1271882A GB05261/70A GB1526170A GB1271882A GB 1271882 A GB1271882 A GB 1271882A GB 05261/70 A GB05261/70 A GB 05261/70A GB 1526170 A GB1526170 A GB 1526170A GB 1271882 A GB1271882 A GB 1271882A
- Authority
- GB
- United Kingdom
- Prior art keywords
- toner
- reservoir
- toner concentration
- developer
- concentration
- 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
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
- G01N27/023—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance where the material is placed in the field of a coil
-
- 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
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
1,271,882. Electro-photographic developing apparatus; automatic control of concentration. RCA CORPORATION. March 31, 1970 [March 27, 1969], No. 15261/70. Headings G2H and G3R. [Also in Division G1] Developer 12, comprising toner and magnetic or conductive carrier particles is sampled by allowing it to fall from a reservoir 50 into a tube 62 around which a coil 70 is wrapped; the inductance of coil 70, which is a function of toner concentration, being used to indicate toner concentration and/or to control toner replenishment from a reservoir 80. In one embodiment Fig. 3 (not shown) 9 circuit connected to coil 70 energizes a motor 76 for rotating a toner feed rod 82 only when toner concentration falls below a predetermined value. In another embodiment Fig. 5 (not shown) the circuit is such that motor 76 is permanently energized, but the rate of rotation of rod 82 is dependant on toner concentration. Developer is returned from tube 62 to reservoir 50 by a screw conveyer (66) Fig. 2 (not shown). Developer may be agitated by a paddle 52 and may be applied under the influence of an electrode 60 by a magnetic brush formed by rotating a brass tube 44 about a magnet 42 and a soft iron bar 48. A motor 54 for photo-conductive sheet feed rollers 20, 22 may be de-energized by the circuit if toner concentration falls so low that reservoir 80 must be empty.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US81113269A | 1969-03-27 | 1969-03-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1271882A true GB1271882A (en) | 1972-04-26 |
Family
ID=25205664
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB05261/70A Expired GB1271882A (en) | 1969-03-27 | 1970-03-31 | Apparatus and method for monitoring and controlling the concentration of toner in a developer mix |
Country Status (10)
Country | Link |
---|---|
US (1) | US3572551A (en) |
JP (1) | JPS4938730B1 (en) |
BE (1) | BE747889A (en) |
CA (1) | CA948276A (en) |
CH (1) | CH533325A (en) |
DE (1) | DE2014430A1 (en) |
FR (1) | FR2035930A1 (en) |
GB (1) | GB1271882A (en) |
NL (1) | NL7004419A (en) |
SE (1) | SE365625B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2000295B (en) * | 1977-06-10 | 1982-03-10 | Basf Ag | Method and device for determining the homogeneity of a magnetic dispersion and method of manufacturing a magnetic recording medium from such a dispersion |
CN113117358A (en) * | 2021-05-21 | 2021-07-16 | 天津民祥生物医药股份有限公司 | A concentrated drying equipment for producing L-prolinamide |
Families Citing this family (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3892672A (en) * | 1970-08-21 | 1975-07-01 | Addressograph Multigraph | Automatic toner concentrate detector and control device |
US3821938A (en) * | 1971-12-17 | 1974-07-02 | Ibm | Toner usage sensing system |
US3873002A (en) * | 1973-04-16 | 1975-03-25 | Xerox Corp | Toner dispenser logic control |
US3834806A (en) * | 1973-05-07 | 1974-09-10 | Xerox Corp | Particle level indicator |
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 |
US3999687A (en) * | 1974-07-17 | 1976-12-28 | Savin Business Machines Corporation | Toner concentration detector |
US3970036A (en) * | 1974-07-17 | 1976-07-20 | Savin Business Machines Corporation | Toner concentration detector for dry powder magnetic brush toning system |
JPS52125339A (en) * | 1976-04-14 | 1977-10-21 | Hitachi Ltd | Detector for toner density |
JPS52131729A (en) * | 1976-04-28 | 1977-11-04 | Ricoh Co Ltd | Toner concentration detection circuit |
JPS5349437A (en) * | 1976-10-16 | 1978-05-04 | Hitachi Ltd | Toner density detector |
US4226525A (en) * | 1976-10-19 | 1980-10-07 | Ricoh Company, Ltd. | Electrostatic copying machine |
DE2747128C3 (en) * | 1976-10-20 | 1980-01-24 | Sharp K.K., Osaka (Japan) | Test device for the amount of developer powder in an electrophotographic copier |
GB1600956A (en) * | 1977-02-28 | 1981-10-21 | Ricoh Kk | Methods and apparatus for detecting toner concentrations |
JPS53126944A (en) * | 1977-04-13 | 1978-11-06 | Hitachi Ltd | Developing device using developing powder |
JPS609269B2 (en) * | 1977-04-19 | 1985-03-08 | 株式会社リコー | Toner concentration detection method in two-component developer |
DE2727402C2 (en) * | 1977-06-18 | 1979-04-19 | Hoechst Ag, 6000 Frankfurt | Device for measuring the toner concentration of a developer mixture |
US4270487A (en) * | 1977-10-27 | 1981-06-02 | Hitachi, Ltd. | Developer regulating device in developing apparatus |
JPS6027985B2 (en) * | 1977-11-07 | 1985-07-02 | 株式会社日立製作所 | Developer toner concentration detection device |
US4310238A (en) * | 1979-09-08 | 1982-01-12 | Ricoh Company, Ltd. | Electrostatic copying apparatus |
JPS6036585B2 (en) * | 1979-11-24 | 1985-08-21 | 株式会社日立製作所 | developing device |
JPS5726879A (en) * | 1980-07-23 | 1982-02-13 | Mita Ind Co Ltd | Control device for replenishing of developer |
US4468112A (en) * | 1981-02-18 | 1984-08-28 | Canon Kabushiki Kaisha | Developer concentration controlling device |
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 |
JPS58136473A (en) * | 1982-02-08 | 1983-08-13 | Hitachi Ltd | Printer |
DE3363624D1 (en) * | 1982-02-11 | 1986-07-03 | Agfa Gevaert Nv | Xerographic copying apparatus |
DE3308066C1 (en) * | 1983-03-08 | 1984-09-13 | M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach | Ink metering device for an ink fountain roller |
JP3021619B2 (en) * | 1990-11-16 | 2000-03-15 | 三洋電機株式会社 | Image forming device |
US5166729A (en) * | 1991-08-30 | 1992-11-24 | Xerox Corporation | Toner concentration sensing apparatus |
JPH09329967A (en) * | 1995-11-27 | 1997-12-22 | Fuji Xerox Co Ltd | Developing device |
EP0807866A1 (en) * | 1996-05-17 | 1997-11-19 | Agfa-Gevaert N.V. | Electrostatographic developing device with toner dosage reservoir |
CN104460267B (en) * | 2013-09-20 | 2019-06-14 | 京瓷办公信息***株式会社 | Developing apparatus, image forming apparatus and toner concentration detection method |
JP6332231B2 (en) * | 2015-10-28 | 2018-05-30 | 京セラドキュメントソリューションズ株式会社 | Developing device and image forming apparatus |
CN112630375B (en) * | 2020-07-31 | 2022-03-29 | 南通贝得彩色印刷有限公司 | Environment-friendly detection method and device for color printing device |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2909303A (en) * | 1957-12-09 | 1959-10-20 | Reserve Mining Co | Ratio control of binder to concentrate |
GB1022373A (en) * | 1963-10-24 | 1966-03-09 | Head Wrightson & Co Ltd | Improvements relating to control of flow of particulate solid materials through pipes |
US3399652A (en) * | 1967-06-14 | 1968-09-03 | Addressograph Multigraph | Automatic toner concentrate detector |
-
1969
- 1969-03-27 US US811132A patent/US3572551A/en not_active Expired - Lifetime
-
1970
- 1970-01-09 CA CA071,825A patent/CA948276A/en not_active Expired
- 1970-01-29 CH CH125870A patent/CH533325A/en not_active IP Right Cessation
- 1970-02-20 FR FR7006175A patent/FR2035930A1/fr not_active Withdrawn
- 1970-03-06 SE SE03011/70A patent/SE365625B/xx unknown
- 1970-03-24 BE BE747889D patent/BE747889A/en unknown
- 1970-03-25 DE DE19702014430 patent/DE2014430A1/de active Pending
- 1970-03-26 NL NL7004419A patent/NL7004419A/xx unknown
- 1970-03-26 JP JP45025589A patent/JPS4938730B1/ja active Pending
- 1970-03-31 GB GB05261/70A patent/GB1271882A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2000295B (en) * | 1977-06-10 | 1982-03-10 | Basf Ag | Method and device for determining the homogeneity of a magnetic dispersion and method of manufacturing a magnetic recording medium from such a dispersion |
CN113117358A (en) * | 2021-05-21 | 2021-07-16 | 天津民祥生物医药股份有限公司 | A concentrated drying equipment for producing L-prolinamide |
Also Published As
Publication number | Publication date |
---|---|
SE365625B (en) | 1974-03-25 |
US3572551A (en) | 1971-03-30 |
DE2014430A1 (en) | 1970-10-01 |
BE747889A (en) | 1970-08-31 |
JPS4938730B1 (en) | 1974-10-19 |
FR2035930A1 (en) | 1970-12-24 |
NL7004419A (en) | 1970-09-29 |
CA948276A (en) | 1974-05-28 |
CH533325A (en) | 1973-01-31 |
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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 |