GB1133192A - Improvements in and relating to electrophotography - Google Patents
Improvements in and relating to electrophotographyInfo
- Publication number
- GB1133192A GB1133192A GB270166A GB270166A GB1133192A GB 1133192 A GB1133192 A GB 1133192A GB 270166 A GB270166 A GB 270166A GB 270166 A GB270166 A GB 270166A GB 1133192 A GB1133192 A GB 1133192A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- jan
- electro
- photo
- latent image
- 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
- G03G13/04—Exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
- G03G13/045—Charging or discharging distinct portions of the charge pattern on the recording material, e.g. discharging non-image areas, contrast enhancement
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photoreceptors In Electrophotography (AREA)
- Electrophotography Using Other Than Carlson'S Method (AREA)
Abstract
1,133,192. Electro-photographic processes. FUJI SHASHIN FILM K.K. Jan.20, 1966 [Jan.21, 1965], No.2701/66. Heading G2H. An electro-photographic process which avoids background development comprises electrostatically charging a photo-conductive insulating layer on a conductive support, imagewise exposing the charged layer to produce an electrostatic latent image, the layer being reversely and uniformly charged before developing the latent image, the potential contrast existing between the inexposed and exposed areas being maintained during the reverse charging. In an example, a layer of photo-conductive material is uniformly charged to have a potentional V o, Fig.2A, e.g. 1200 V. Exposure produces a potential contrast of #V, Fig. 2B, between unexposed portions X o to X 1 and exposed portions X 1 to X 2 . A reverse charge e.g. - 900 V causes the potential of the portion X 1 to X 2 to fall to V R , Fig. 2C, having an approximate value of 50 V which prevents background development.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP288665 | 1965-01-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1133192A true GB1133192A (en) | 1968-11-13 |
Family
ID=11541823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB270166A Expired GB1133192A (en) | 1965-01-21 | 1966-01-20 | Improvements in and relating to electrophotography |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE675325A (en) |
| DE (1) | DE1522595C3 (en) |
| GB (1) | GB1133192A (en) |
| NL (1) | NL6600805A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4038544A (en) * | 1976-05-03 | 1977-07-26 | Xerox Corporation | Apparatus and method for developing an electrostatic latent image |
| DE2658280A1 (en) * | 1976-12-22 | 1978-07-06 | Siemens Ag | METHOD OF REMOVING THE UNDERGROUND CHARGE DURING ELECTROPHOTOGRAPHIC PICTURE REPRODUCTION AND DEVICE FOR ITS IMPLEMENTATION |
-
1966
- 1966-01-19 BE BE675325D patent/BE675325A/xx unknown
- 1966-01-20 DE DE19661522595 patent/DE1522595C3/en not_active Expired
- 1966-01-20 GB GB270166A patent/GB1133192A/en not_active Expired
- 1966-01-21 NL NL6600805A patent/NL6600805A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1522595B2 (en) | 1972-07-06 |
| DE1522595A1 (en) | 1969-10-02 |
| NL6600805A (en) | 1966-07-22 |
| BE675325A (en) | 1966-05-16 |
| DE1522595C3 (en) | 1974-08-01 |
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