GB1219443A - A reversal development process for electrophotography - Google Patents
A reversal development process for electrophotographyInfo
- Publication number
- GB1219443A GB1219443A GB30771/68A GB3077168A GB1219443A GB 1219443 A GB1219443 A GB 1219443A GB 30771/68 A GB30771/68 A GB 30771/68A GB 3077168 A GB3077168 A GB 3077168A GB 1219443 A GB1219443 A GB 1219443A
- Authority
- GB
- United Kingdom
- Prior art keywords
- charged
- conductor
- uniformly charged
- charge density
- uniformly
- 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
- G03G13/00—Electrographic processes using a charge pattern
- G03G13/06—Developing
- G03G13/10—Developing using a liquid developer, e.g. liquid suspension
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Developing For Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
- Wet Developing In Electrophotography (AREA)
Abstract
1,219,443. Developing electrostatic images. FUJI SHASHIN FILM K.K. June 27, 1968 [July 1, 1967], No.30771/68. Heading G2H. A reversal development process, in which developer adheres to a relatively low charged portion of the charged pattern on an insulating surface 2 rather than the charged pattern 4 having the maximum charge density, uses an uniformly charged insulating surface facing a conductor 3 to reproduce a liquid developed image with continuous gradation avoiding edge effect. As shown, the image surface and uniformly charged surface are common and comprises a photo-conductive material on a conductive support. Part A of the surface 2 is uniformly charged and exposed while part B is uniformly charged to the same polarity. The surface 2 is then spaced uniformly from a conductor 3. Lines of force extend from the conductor 3 to the part A and from the part B to the conductor. The voltage V 1 of the part of the latent image having maximum charge density is chosen so that it is equal or greater than V 2 S 2 /s 1 + s2 where S 1 is the area having such charge density, V 2 is the potential of the uniformly charged insulating surface, and S 2 is the area of such surface.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4225367 | 1967-07-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1219443A true GB1219443A (en) | 1971-01-13 |
Family
ID=12630846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30771/68A Expired GB1219443A (en) | 1967-07-01 | 1968-06-27 | A reversal development process for electrophotography |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3622314A (en) |
| DE (1) | DE1772763C3 (en) |
| FR (1) | FR1603117A (en) |
| GB (1) | GB1219443A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3784397A (en) * | 1970-02-04 | 1974-01-08 | Xerox Corp | Imaging system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2573881A (en) * | 1948-11-02 | 1951-11-06 | Battelle Development Corp | Method and apparatus for developing electrostatic images with electroscopic powder |
| US2777418A (en) * | 1954-02-08 | 1957-01-15 | Haloid Co | Apparatus for developing a powder image on a xerographic plate |
| US2817598A (en) * | 1955-02-01 | 1957-12-24 | Haloid Co | Continuous tone reversal development process |
| US2877132A (en) * | 1955-02-18 | 1959-03-10 | Haloid Xerox Inc | Method for development of electrostatic images |
| US3155531A (en) * | 1958-09-23 | 1964-11-03 | Harris Intertype Corp | Meagnetic liquid developer and method for electrostatic images |
| US3147147A (en) * | 1961-06-05 | 1964-09-01 | Xerox Corp | Xerographic developing apparatus and electrode |
-
1968
- 1968-06-27 GB GB30771/68A patent/GB1219443A/en not_active Expired
- 1968-07-01 DE DE1772763A patent/DE1772763C3/en not_active Expired
- 1968-07-01 US US741519A patent/US3622314A/en not_active Expired - Lifetime
- 1968-07-01 FR FR1603117D patent/FR1603117A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1772763A1 (en) | 1971-11-11 |
| DE1772763B2 (en) | 1975-01-16 |
| US3622314A (en) | 1971-11-23 |
| DE1772763C3 (en) | 1975-08-28 |
| FR1603117A (en) | 1971-03-22 |
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