GB1398964A - Method of monitoring a toner mix - Google Patents
Method of monitoring a toner mixInfo
- Publication number
- GB1398964A GB1398964A GB4098472A GB4098472A GB1398964A GB 1398964 A GB1398964 A GB 1398964A GB 4098472 A GB4098472 A GB 4098472A GB 4098472 A GB4098472 A GB 4098472A GB 1398964 A GB1398964 A GB 1398964A
- Authority
- GB
- United Kingdom
- Prior art keywords
- toner
- brush
- replenisher
- integrating amplifier
- potential
- 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
- 238000000034 method Methods 0.000 title 1
- 238000012544 monitoring process Methods 0.000 title 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
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)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
1398964 Developing electrostatic latent images; automatic control of concentration EASTMAN KODAK CO 4 Sept 1972 [ 3 Sept 1971] 40984/72 Headings G2H and G3R The concentration of toner particles in a carrier/toner developer mixture applied to electrostatic latent images on a photo-conductive belt 2 by a magnetic brush 31 is monitored by measuring the potential on the brush when the brush is in contact with charge-free portions of the belt between successive charge-bearing images. A toner replenisher 47 is actuated whenever the potential on the brush, which rises with depletion of toner, exceeds a predetermined value. Preferably the periodically obtained potential values are applied as input pulses to an integrating amplifier 55, and the replenisher is actuated when the accumulated output of the integrating amplifier reaches a threshold value within a time set by a counter 56. If the accumulated output does not reach the threshold within the time set, the counter returns the integrating amplifier and itself to zero, and actuation of the replenisher has the same effect.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17760071A | 1971-09-03 | 1971-09-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1398964A true GB1398964A (en) | 1975-06-25 |
Family
ID=22649235
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4098472A Expired GB1398964A (en) | 1971-09-03 | 1972-09-04 | Method of monitoring a toner mix |
Country Status (3)
Country | Link |
---|---|
US (1) | US3719165A (en) |
JP (1) | JPS5432573B2 (en) |
GB (1) | GB1398964A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4343548A (en) | 1980-05-19 | 1982-08-10 | Xerox Corporation | Control system for regulating the concentration of toner particles within a developer mixture |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU467941B2 (en) * | 1971-09-25 | 1975-12-18 | Hoechst Aktiengesellschaft | Method of and apparatus for measuring or measuring and replacing toner consumed inan electrophotographic reproduction machine |
US3869910A (en) * | 1973-06-18 | 1975-03-11 | Xerox Corp | Diagnostic test device for developer materials |
JPS5619637B2 (en) * | 1973-06-20 | 1981-05-08 | ||
US3889637A (en) * | 1973-06-28 | 1975-06-17 | Xerox Corp | Self-biased development electrode and reproducing machine employing same |
JPS5346098B2 (en) * | 1973-11-27 | 1978-12-11 | ||
US3893408A (en) * | 1973-12-26 | 1975-07-08 | Xerox Corp | Toner dispensing system |
JPS613004Y2 (en) * | 1975-01-13 | 1986-01-30 | ||
US4179213A (en) * | 1978-04-10 | 1979-12-18 | International Business Machines Corporation | Vector pinning in an electrophotographic machine |
US4178095A (en) * | 1978-04-10 | 1979-12-11 | International Business Machines Corporation | Abnormally low reflectance photoconductor sensing system |
US4183657A (en) * | 1978-04-10 | 1980-01-15 | International Business Machines Corporation | Dynamic reference for an image quality control system |
US4190018A (en) * | 1979-02-02 | 1980-02-26 | Pitney-Bowes, Inc. | Powder density control circuit for a photocopier |
US4492179A (en) * | 1983-06-16 | 1985-01-08 | Xerox Corporation | Control system for regulating the dispensing of marking particles in an electrophotographic printing machine |
US5150135A (en) * | 1990-08-20 | 1992-09-22 | Xerox Corporation | Current sensing development control system for an ionographic printing machine |
US5189475A (en) * | 1991-08-26 | 1993-02-23 | Xerox Corporation | Developer mechanism with sensor and notched auger |
US8145078B2 (en) * | 2008-05-27 | 2012-03-27 | Xerox Corporation | Toner concentration system control with state estimators and state feedback methods |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3527651A (en) * | 1966-10-20 | 1970-09-08 | Addressograph Multigraph | Method of and apparatus for developing electrostatic images |
US3399652A (en) * | 1967-06-14 | 1968-09-03 | Addressograph Multigraph | Automatic toner concentrate detector |
US3529546A (en) * | 1967-07-12 | 1970-09-22 | Ibm | Printing substance control |
US3599605A (en) * | 1969-03-20 | 1971-08-17 | Ibm | Self-biasing development electrode for electrophotography |
US3654893A (en) * | 1970-05-01 | 1972-04-11 | Eastman Kodak Co | Automatic bias control for electrostatic development |
US3674532A (en) * | 1970-07-23 | 1972-07-04 | Eastman Kodak Co | Control for bias of magnetic brush and method |
-
1971
- 1971-09-03 US US00177600A patent/US3719165A/en not_active Expired - Lifetime
-
1972
- 1972-09-01 JP JP8723572A patent/JPS5432573B2/ja not_active Expired
- 1972-09-04 GB GB4098472A patent/GB1398964A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4343548A (en) | 1980-05-19 | 1982-08-10 | Xerox Corporation | Control system for regulating the concentration of toner particles within a developer mixture |
Also Published As
Publication number | Publication date |
---|---|
JPS4857638A (en) | 1973-08-13 |
US3719165A (en) | 1973-03-06 |
JPS5432573B2 (en) | 1979-10-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |