GB1083363A - Apparatus for developing electrostatic images of records - Google Patents
Apparatus for developing electrostatic images of recordsInfo
- Publication number
- GB1083363A GB1083363A GB3892/65A GB389265A GB1083363A GB 1083363 A GB1083363 A GB 1083363A GB 3892/65 A GB3892/65 A GB 3892/65A GB 389265 A GB389265 A GB 389265A GB 1083363 A GB1083363 A GB 1083363A
- Authority
- GB
- United Kingdom
- Prior art keywords
- brush
- toner
- powder
- brushes
- electro
- 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
- G03G15/09—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer using magnetic brush
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
1,083,363. Electro-static developing apparatus. HITACHI Ltd. Jan. 28, 1965 [Jan. 30, 1964], No. 3892/65. Headings G2H and G3R. Apparatus for dry powder development of electro-static images comprises a rotating magnetic brush 4 in contact with the surface of a moving web 14 on which electro-static images are formed, and a rotating insulated brush 5 of fine metal wires on an insulated hub 7, the brush 5 being in deep intersection with the magnetic brush and mostly immersed in reservoir 9 of a developer powder consisting of a mixture of iron-powder carrier and a toner powder which may be a polymer derived from styrene and/or its homologues. Brush 4 is formed by ferrite permanent bar or arcuate magnets 1 on a non- magnetic hexagonal bar 3. The iron powder and toner are charged to opposite electro-static polarities by the rotation of brush 5 and are mutually attracted. Excess free toner is removed from the magnetically saturated brush 4, formed of iron powder, by brush 5. Fresh toner is supplied from store 10 in which it is agitated and charged by brushes 12 to prevent coagulation, and is fed in controlled amounts by brush 13 to reservoir 9. As shown, two intersecting brushes 5 are used with separate magnetic brushes 4. The level of toner is observed through the transparent wall of store 10. Image density control is carried out by measuring the light reflected from brush 4 with a transducer whose output is amplified and fed to a device which controls the speed of rotation of brushes 4 and 5.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP426664 | 1964-01-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1083363A true GB1083363A (en) | 1967-09-13 |
Family
ID=11579720
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3892/65A Expired GB1083363A (en) | 1964-01-30 | 1965-01-28 | Apparatus for developing electrostatic images of records |
Country Status (2)
Country | Link |
---|---|
US (1) | US3318284A (en) |
GB (1) | GB1083363A (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3402698A (en) * | 1966-06-06 | 1968-09-24 | Konishiroku Photo Ind | Magnet assembly for magnetic developing brush and developing apparatus for electrostatic process |
US3357402A (en) * | 1966-12-27 | 1967-12-12 | Xerox Corp | Rotary brush development |
US3557751A (en) * | 1967-05-20 | 1971-01-26 | Minolta Camera Kk | Device for dry development in electrophotography |
US3552355A (en) * | 1968-04-22 | 1971-01-05 | Xerox Corp | Development apparatus |
US3848566A (en) * | 1969-07-11 | 1974-11-19 | Xerox Corp | Donor apparatus |
US3632370A (en) * | 1970-03-20 | 1972-01-04 | Xerox Corp | Multiple brush development |
US3802389A (en) * | 1971-04-30 | 1974-04-09 | Iwasaki Kk | Developing apparatus used in electrophotography |
BE795110A (en) * | 1972-02-07 | 1973-05-29 | Identicator Corp | FINGERPRINT DEVELOPER DEVICE |
US3900002A (en) * | 1972-05-10 | 1975-08-19 | Xerox Corp | Donor apparatus |
JPS5426172B2 (en) * | 1973-05-23 | 1979-09-03 | ||
US3892908A (en) * | 1973-06-25 | 1975-07-01 | Minnesota Mining & Mfg | Coating of solid substrates with magnetically propelled particles |
US4041903A (en) * | 1974-05-21 | 1977-08-16 | Konishiroku Photo Industry Co., Ltd. | Developing device for use in electrophotography |
JPS50149350A (en) * | 1974-05-21 | 1975-11-29 | ||
US3945343A (en) * | 1975-03-24 | 1976-03-23 | General Electric Company | Magnetic brush for use in magnetic printing |
JPS602598Y2 (en) * | 1978-04-19 | 1985-01-24 | 株式会社東芝 | Toner concentration detection device |
US4330193A (en) * | 1979-10-01 | 1982-05-18 | Xerox Corporation | Development system |
JPS60178472A (en) * | 1984-02-27 | 1985-09-12 | Oki Electric Ind Co Ltd | Dry type developing device |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3103445A (en) * | 1963-09-10 | Method of developing an electrostatic | ||
US2987037A (en) * | 1955-12-21 | 1961-06-06 | Ibm | Xerographic printer |
GB927928A (en) * | 1958-08-26 | 1963-06-06 | Ozalid Co Ltd | Improvements in and relating to electro-photographic developing apparatus |
US3140199A (en) * | 1961-04-28 | 1964-07-07 | Eastman Kodak Co | Vibrating belt powder cloud generator for xerography |
US3152924A (en) * | 1961-05-24 | 1964-10-13 | Robertson Photo Mechanix Inc | Xerographic brush |
NL286833A (en) * | 1961-12-27 | |||
US3145122A (en) * | 1962-08-13 | 1964-08-18 | Addressograph Multigraph | Apparatus for applying developer powder to photo-conductive insulating material |
-
1965
- 1965-01-27 US US428455A patent/US3318284A/en not_active Expired - Lifetime
- 1965-01-28 GB GB3892/65A patent/GB1083363A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3318284A (en) | 1967-05-09 |
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