JPS55144254A - Developing method and its apparatus - Google Patents
Developing method and its apparatusInfo
- Publication number
- JPS55144254A JPS55144254A JP5264079A JP5264079A JPS55144254A JP S55144254 A JPS55144254 A JP S55144254A JP 5264079 A JP5264079 A JP 5264079A JP 5264079 A JP5264079 A JP 5264079A JP S55144254 A JPS55144254 A JP S55144254A
- Authority
- JP
- Japan
- Prior art keywords
- sleeve
- magnetic
- drum
- electric field
- formula
- 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
Abstract
PURPOSE: To enable high fidelity gradation to be reproduced, by applying a low frequency alternating electric field having given characteristics and transfarring a magnetic developer to a nonimage area under a necessary magnetic restriction.
CONSTITUTION: Photosensitive drum 11 has an insulating layer on a CdS layer, and nonmagnetic sleeve 12 is rotated in the same direction at equal speed. A developing section is formed near the minimal gap of drum 11 and sleeve 12. Fixed permanent magnets 13 are installed in sleeve 12, attract magnetic toner 14, and this is uniformized in thickness on sleeve 12 with magnetic blade 15. Sleeve 12 and blade 15 are kept in conduction, and an alternating voltage in the range shown by formula I is applied to the conductive support of drum 11 from power source 16. In formula I, amplitude of the alternating electric field is Vp-p volts, and frequency is (f) Hz. As a result, a sharp image of high gradation and low fog can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5264079A JPS55144254A (en) | 1979-04-28 | 1979-04-28 | Developing method and its apparatus |
US06/058,435 US4292387A (en) | 1978-07-28 | 1979-07-18 | Magnetic developing method under A.C. electrical bias and apparatus therefor |
CA000332064A CA1142804A (en) | 1978-07-28 | 1979-07-18 | Developing method for developer transfer under electrical bias and apparatus therefor |
AU49115/79A AU530517B2 (en) | 1978-07-28 | 1979-07-20 | Developing with an electrical bias |
GB7925724A GB2030478B (en) | 1978-07-28 | 1979-07-24 | Developing method for developer transfer under electrical bias |
DE19792930595 DE2930595A1 (en) | 1978-07-28 | 1979-07-27 | METHOD FOR DEVELOPING A LATENT IMAGE AND DEVICE THEREFOR |
DE2954572A DE2954572C2 (en) | 1978-07-28 | 1979-07-27 | |
FR7919483A FR2433781B1 (en) | 1978-07-28 | 1979-07-27 | DEVELOPMENT METHOD WITH TRANSFER OF DEVELOPING AGENT BY ELECTRIC POLARIZATION FIELD AND APPARATUS FOR CARRYING OUT SAID METHOD |
US06/426,979 US4473627A (en) | 1978-07-28 | 1982-09-29 | Developing method for developer transfer under electrical bias and apparatus therefor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5264079A JPS55144254A (en) | 1979-04-28 | 1979-04-28 | Developing method and its apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55144254A true JPS55144254A (en) | 1980-11-11 |
Family
ID=12920424
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5264079A Pending JPS55144254A (en) | 1978-07-28 | 1979-04-28 | Developing method and its apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55144254A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5863964A (en) * | 1981-10-14 | 1983-04-16 | Ricoh Co Ltd | Developing device |
US4671641A (en) * | 1982-02-17 | 1987-06-09 | Tokyo Shibaura Denki Kabushiki Kaisha | Developing apparatus |
-
1979
- 1979-04-28 JP JP5264079A patent/JPS55144254A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5863964A (en) * | 1981-10-14 | 1983-04-16 | Ricoh Co Ltd | Developing device |
US4671641A (en) * | 1982-02-17 | 1987-06-09 | Tokyo Shibaura Denki Kabushiki Kaisha | Developing apparatus |
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