JPS54115233A - Reversal development process - Google Patents
Reversal development processInfo
- Publication number
- JPS54115233A JPS54115233A JP2248478A JP2248478A JPS54115233A JP S54115233 A JPS54115233 A JP S54115233A JP 2248478 A JP2248478 A JP 2248478A JP 2248478 A JP2248478 A JP 2248478A JP S54115233 A JPS54115233 A JP S54115233A
- Authority
- JP
- Japan
- Prior art keywords
- toner
- voltage
- developing
- roller
- drum
- 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.)
- Granted
Links
Landscapes
- Developing For Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
PURPOSE: To obtain good images using one component type developer without any useless consumption of toner, by applying different specified bias voltages to a developer feeder in developing and in not developing.
CONSTITUTION: Photosensitive drum 14 is positively charged with corona charger 15, and a negative latent image is formed by imagewise exposure. Toner having a volume resistivity of above 1013 ohm.cm in a powder state is fed from hopper 18 to conductive developing roller 17, and the toner is positively charged with toner charger 20 made of friction charging blades. In developing, positive voltage is applied to roller 17 from voltage supply E1 of bias voltage controller 19, and the toner is attached to apparently negative low voltage areas, resulting in effecting reversal development. When development is stopped, negative voltage is applied to roller 17 from voltage supply E2, thereby permitting the toner not to be attached to drum 14, because toner charge polarity is positive, even if residual voltage on drum 14 is as high as several ten volts.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2248478A JPS54115233A (en) | 1978-02-28 | 1978-02-28 | Reversal development process |
US06/015,471 US4350749A (en) | 1978-02-28 | 1979-02-26 | Reverse development method |
DE2954126A DE2954126C2 (en) | 1978-02-28 | 1979-02-28 | Reversal development process for electrostatic charge images on an electrophotographic recording medium |
DE2907713A DE2907713C2 (en) | 1978-02-28 | 1979-02-28 | Reversal development process for electrostatic charge images |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2248478A JPS54115233A (en) | 1978-02-28 | 1978-02-28 | Reversal development process |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54115233A true JPS54115233A (en) | 1979-09-07 |
JPS6223310B2 JPS6223310B2 (en) | 1987-05-22 |
Family
ID=12083990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2248478A Granted JPS54115233A (en) | 1978-02-28 | 1978-02-28 | Reversal development process |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54115233A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5654447A (en) * | 1979-10-09 | 1981-05-14 | Hitachi Koki Co Ltd | Electrophotographic reversal development method |
JPS58123571A (en) * | 1982-01-11 | 1983-07-22 | ピツトネイ・ボウズ・インコ−ポレ−テツド | Self cleaning zerograph apparatus |
JPS597973A (en) * | 1982-06-28 | 1984-01-17 | ゼロツクス・コ−ポレ−シヨン | Developer for electrophotographic copying machine |
JPS59133573A (en) * | 1983-01-20 | 1984-07-31 | Toshiba Corp | Image forming device |
JPS6313080A (en) * | 1986-07-03 | 1988-01-20 | Canon Inc | Electrophotographic device providing reversal development |
JPH08227210A (en) * | 1995-02-22 | 1996-09-03 | Nec Data Terminal Ltd | Electrophotographic printer |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0583812U (en) * | 1992-04-10 | 1993-11-12 | 株式会社本山製作所 | Pressure reducing valve |
-
1978
- 1978-02-28 JP JP2248478A patent/JPS54115233A/en active Granted
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5654447A (en) * | 1979-10-09 | 1981-05-14 | Hitachi Koki Co Ltd | Electrophotographic reversal development method |
JPS58123571A (en) * | 1982-01-11 | 1983-07-22 | ピツトネイ・ボウズ・インコ−ポレ−テツド | Self cleaning zerograph apparatus |
JPH0546552B2 (en) * | 1982-01-11 | 1993-07-14 | Pitney Bowes Inc | |
JPS597973A (en) * | 1982-06-28 | 1984-01-17 | ゼロツクス・コ−ポレ−シヨン | Developer for electrophotographic copying machine |
JPS59133573A (en) * | 1983-01-20 | 1984-07-31 | Toshiba Corp | Image forming device |
JPS6313080A (en) * | 1986-07-03 | 1988-01-20 | Canon Inc | Electrophotographic device providing reversal development |
JPH08227210A (en) * | 1995-02-22 | 1996-09-03 | Nec Data Terminal Ltd | Electrophotographic printer |
Also Published As
Publication number | Publication date |
---|---|
JPS6223310B2 (en) | 1987-05-22 |
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