JPS57114154A - Electrophotographing method - Google Patents
Electrophotographing methodInfo
- Publication number
- JPS57114154A JPS57114154A JP56000968A JP96881A JPS57114154A JP S57114154 A JPS57114154 A JP S57114154A JP 56000968 A JP56000968 A JP 56000968A JP 96881 A JP96881 A JP 96881A JP S57114154 A JPS57114154 A JP S57114154A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- humidity
- developing device
- temperature
- 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.)
- Pending
Links
- 239000011162 core material Substances 0.000 abstract 1
- 230000005484 gravity Effects 0.000 abstract 1
- 108091008695 photoreceptors Proteins 0.000 abstract 1
- 229920005989 resin Polymers 0.000 abstract 1
- 239000011347 resin Substances 0.000 abstract 1
- 229920002050 silicone resin Polymers 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE:To selectively form positive and negative images by using one electrophotographic copying machine, by changing temperature and humidity in a developing device containing a developer to reverse the polarity of a charged toner. CONSTITUTION:A carrier core material having >=4.0 specific gravity, such as Fe or Ni, is mixed with a silicone resin-coated carrier, and a resin ordinarily used for toner to obtain a developer reversing the charging polarity of the toner in accordance with temperature and humidity. This developer is placed into the developing device of an electrophotographic copying apparatus, temperature and humidity in the developing device are set, for example, 10-13 deg.C and 30-35%, respectively, and the electrostatic latent image of the photoreceptor imagewise exposed is developed with said developer to form a positive image from a negative image. On the contrary, the temperature and humidity in the developing device is set, for example, to 30-33 deg.C and 80-90% to form a negative image from a positive image.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56000968A JPS57114154A (en) | 1981-01-07 | 1981-01-07 | Electrophotographing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56000968A JPS57114154A (en) | 1981-01-07 | 1981-01-07 | Electrophotographing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57114154A true JPS57114154A (en) | 1982-07-15 |
Family
ID=11488423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56000968A Pending JPS57114154A (en) | 1981-01-07 | 1981-01-07 | Electrophotographing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57114154A (en) |
-
1981
- 1981-01-07 JP JP56000968A patent/JPS57114154A/en active Pending
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