GB1476677A - Toner dispensing system - Google Patents
Toner dispensing systemInfo
- Publication number
- GB1476677A GB1476677A GB4996574A GB4996574A GB1476677A GB 1476677 A GB1476677 A GB 1476677A GB 4996574 A GB4996574 A GB 4996574A GB 4996574 A GB4996574 A GB 4996574A GB 1476677 A GB1476677 A GB 1476677A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sump
- circuit
- developing means
- concentration control
- toner 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
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
1476677 Toner concentration control XEROX CORP 19 Nov 1974 [26 Dec 1973] 49965/74 Heading G2H A toner concentration control device comprises magnetic brush developing means 20 which collects developer from a sump 24, carries it past an electrically conductive trimmer bar 34 and in the process a circuit is completed, causing shorting, if insufficient toner particles, which are insulative, are present. A dispensing device is activated by the circuit when a given number of shorts is achieved in unit time. The time characteristics are adjustable using a variable resistor. Lifting unit 22 attracts particles from developing means 20 and returns them, via agitating baffles, to the sump 24.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US428592A US3893408A (en) | 1973-12-26 | 1973-12-26 | Toner dispensing system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1476677A true GB1476677A (en) | 1977-06-16 |
Family
ID=23699577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4996574A Expired GB1476677A (en) | 1973-12-26 | 1974-11-19 | Toner dispensing system |
Country Status (4)
Country | Link |
---|---|
US (1) | US3893408A (en) |
CA (1) | CA1041593A (en) |
GB (1) | GB1476677A (en) |
NL (1) | NL7415076A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2144003A (en) * | 1983-07-25 | 1985-02-20 | Belco Pollution Control Corp | Power supply for electrostatic precipitator |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4200665A (en) * | 1974-06-18 | 1980-04-29 | Koichi Suzuki | Method for controlling the toner concentration of a developer used in a dry type developing system |
US4112867A (en) * | 1974-06-18 | 1978-09-12 | Ricoh Company, Ltd. | Apparatus for controlling the toner concentration of a developer used in a dry type developing system |
US3999119A (en) * | 1975-03-26 | 1976-12-21 | Xerox Corporation | Measuring toner concentration |
US4076857A (en) * | 1976-06-28 | 1978-02-28 | Eastman Kodak Company | Process for developing electrographic images by causing electrical breakdown in the developer |
JPS5349437A (en) * | 1976-10-16 | 1978-05-04 | Hitachi Ltd | Toner density detector |
US4190018A (en) * | 1979-02-02 | 1980-02-26 | Pitney-Bowes, Inc. | Powder density control circuit for a photocopier |
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 |
Family Cites Families (5)
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 |
US3572551A (en) * | 1969-03-27 | 1971-03-30 | Rca Corp | Apparatus for monitoring and controlling the concentration of toner in a developer mix |
BE757197A (en) * | 1969-10-09 | 1971-03-16 | Rca Corp | DEVICE FOR MONITORING AND ADJUSTING THE CONCENTRATION OF POWDER PARTICLES IN A MIXTURE OF POWDER AND MAGNETIC PARTICLES |
US3698926A (en) * | 1969-11-11 | 1972-10-17 | Katsuragawa Denki Kk | Method and apparatus for supplementing toner in electrophotographic machines |
US3719165A (en) * | 1971-09-03 | 1973-03-06 | Eastman Kodak Co | Tuner concentration control apparatus |
-
1973
- 1973-12-26 US US428592A patent/US3893408A/en not_active Expired - Lifetime
-
1974
- 1974-10-29 CA CA212,580A patent/CA1041593A/en not_active Expired
- 1974-11-19 GB GB4996574A patent/GB1476677A/en not_active Expired
- 1974-11-19 NL NL7415076A patent/NL7415076A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2144003A (en) * | 1983-07-25 | 1985-02-20 | Belco Pollution Control Corp | Power supply for electrostatic precipitator |
Also Published As
Publication number | Publication date |
---|---|
NL7415076A (en) | 1975-03-27 |
US3893408A (en) | 1975-07-08 |
CA1041593A (en) | 1978-10-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
746 | Register noted 'licences of right' (sect. 46/1977) | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19921119 |