GB1256282A - Electrostatic image development apparatus - Google Patents
Electrostatic image development apparatusInfo
- Publication number
- GB1256282A GB1256282A GB3939369A GB3939369A GB1256282A GB 1256282 A GB1256282 A GB 1256282A GB 3939369 A GB3939369 A GB 3939369A GB 3939369 A GB3939369 A GB 3939369A GB 1256282 A GB1256282 A GB 1256282A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- drum
- field
- brush
- developing
- 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)
- Dry Development In Electrophotography (AREA)
Abstract
1,256,282. Electro-photographic developing apparatus. RANK XEROX Ltd. Aug. 6, 1969 [Aug. 7, 1968 (2)], No.39393/69. Heading G2H. Means are provided for rapidly moving a magnetic brush 44 out of contact with a photoconductive drum 10 to prevent toner deposition on non-imaged portions of the drum. During developing, a magnet 59 comprising north and south poles 60, 61 separated by insulator 62 is positioned such that the main part 45 of its field is directed towards the drum. Fringe portions of the field enable a rotating, non-magnetic cylinder 51 surrounding the magnet to transport toner from a trough (30), Figs.2 and 5 (not shown) into main field 45 to form the brush 44. To stop developing a solenoid (SOL-1) Figs.2 and 4 (not shown) is energized to rotate magnet 59 through an angle such that field portion 45 is directed away from the drum. Preferably, as magnet shaft 65 rotates to stop developing, a collar 94 fixed thereto operates a pivoted blade 92 through linkage 95 to squash the brush 44. Simultaneously with these operations, an electro-magnetic clutch (71) Fig. 2 (not shown) disconnects the drive from cylinder 51. The trough (30) may be split into a portion containing cylinder 51 and a developer resevoir portion; helical feed screws (42, 43) Figs.2 and 5 (not shown) extending through both portions to maintain a continuous flow of developer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US75085268A | 1968-08-07 | 1968-08-07 | |
| US75085168A | 1968-08-07 | 1968-08-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1256282A true GB1256282A (en) | 1971-12-08 |
Family
ID=27115331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3939369A Expired GB1256282A (en) | 1968-08-07 | 1969-08-06 | Electrostatic image development apparatus |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS4822210B1 (en) |
| BE (1) | BE737102A (en) |
| CH (1) | CH496263A (en) |
| CS (1) | CS161861B2 (en) |
| DE (1) | DE1939628B2 (en) |
| ES (1) | ES370289A1 (en) |
| FR (1) | FR2015233A1 (en) |
| GB (1) | GB1256282A (en) |
| PL (1) | PL80247B1 (en) |
| SE (1) | SE353165B (en) |
| SU (1) | SU380031A3 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5086721A (en) * | 1973-12-05 | 1975-07-12 | ||
| GB1485148A (en) * | 1973-12-17 | 1977-09-08 | Oce Van Der Grinten Nv | Apparatus for the development of an electrostatic charge image on a support |
| US4170287A (en) * | 1977-04-18 | 1979-10-09 | E. I. Du Pont De Nemours And Company | Magnetic auger |
| DE3150329A1 (en) * | 1981-12-18 | 1983-07-07 | Nixdorf Computer Ag, 4790 Paderborn | DEVICE FOR MAGNETIC BRUSH DEVELOPMENT |
-
1969
- 1969-08-01 CH CH1178869A patent/CH496263A/en not_active IP Right Cessation
- 1969-08-04 DE DE19691939628 patent/DE1939628B2/en active Granted
- 1969-08-05 BE BE737102D patent/BE737102A/xx unknown
- 1969-08-05 PL PL13523869A patent/PL80247B1/en unknown
- 1969-08-05 JP JP6148769A patent/JPS4822210B1/ja active Pending
- 1969-08-05 SE SE1090569A patent/SE353165B/xx unknown
- 1969-08-06 CS CS545969A patent/CS161861B2/cs unknown
- 1969-08-06 ES ES370289A patent/ES370289A1/en not_active Expired
- 1969-08-06 SU SU1355135A patent/SU380031A3/ru active
- 1969-08-06 GB GB3939369A patent/GB1256282A/en not_active Expired
- 1969-08-07 FR FR6927184A patent/FR2015233A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| SE353165B (en) | 1973-01-22 |
| SU380031A3 (en) | 1973-04-20 |
| PL80247B1 (en) | 1975-08-30 |
| DE1939628A1 (en) | 1970-02-26 |
| ES370289A1 (en) | 1971-07-01 |
| FR2015233A1 (en) | 1970-04-24 |
| CH496263A (en) | 1970-09-15 |
| BE737102A (en) | 1970-02-05 |
| JPS4822210B1 (en) | 1973-07-04 |
| CS161861B2 (en) | 1975-06-10 |
| DE1939628C3 (en) | 1979-06-07 |
| DE1939628B2 (en) | 1978-09-28 |
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