JPS54121737A - Electrostatic recording method - Google Patents
Electrostatic recording methodInfo
- Publication number
- JPS54121737A JPS54121737A JP2874178A JP2874178A JPS54121737A JP S54121737 A JPS54121737 A JP S54121737A JP 2874178 A JP2874178 A JP 2874178A JP 2874178 A JP2874178 A JP 2874178A JP S54121737 A JPS54121737 A JP S54121737A
- Authority
- JP
- Japan
- Prior art keywords
- image
- bias voltage
- developed
- polarity
- black
- 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
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
Abstract
PURPOSE: To prevent gradation disorder and fogging in a recorded image, by applying a development bias voltage higher than the optimum value in the direction of latent image charge polarity to form a reversed developed image, and by transferring the image with a predetermined polarity transfer bias voltage.
CONSTITUTION: On primary recording medium 1 static latent image 4 of positive polarity is formed having different voltage, such as 550 V or 30W50 V in accordance with the black and white levels of an original. This latent image 4 is developed in developing station 15 with a magnetic toner of 109W1016 ohm.cm resistivity charged with development bias voltage source 3 set to positive 600 V or the like somewhat higher than the optimum bias voltage where black level density decreases to the minimum, and in the same polarity as that of image 4, resulting in forming a developed image having reversed black and white levels with slight fog and good gradation. This developed image is transferred with transfer corona charger 10 onto recording medium 9 with transfer bias voltage applied in the same polarity as that of image 4, resulting in recording a good image of good gradation and low fog.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2874178A JPS54121737A (en) | 1978-03-15 | 1978-03-15 | Electrostatic recording method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2874178A JPS54121737A (en) | 1978-03-15 | 1978-03-15 | Electrostatic recording method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54121737A true JPS54121737A (en) | 1979-09-21 |
Family
ID=12256836
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2874178A Pending JPS54121737A (en) | 1978-03-15 | 1978-03-15 | Electrostatic recording method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54121737A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0240665A (en) * | 1988-07-29 | 1990-02-09 | Mita Ind Co Ltd | Halftone marking copying method and its device |
-
1978
- 1978-03-15 JP JP2874178A patent/JPS54121737A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0240665A (en) * | 1988-07-29 | 1990-02-09 | Mita Ind Co Ltd | Halftone marking copying method and its device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1382710A (en) | Electrostatic printing machine | |
GB1469159A (en) | Electrophotographic apparatus | |
JPS57147655A (en) | Bicolor developing method | |
JPS56144454A (en) | Electrophotographic method | |
JPS54121737A (en) | Electrostatic recording method | |
JPS54115233A (en) | Reversal development process | |
JPS54109842A (en) | Information recorder | |
JPS56104337A (en) | Developing method in two color copying system | |
JPS5574567A (en) | Developing device of one-component toner | |
JPS5511226A (en) | Electrostatic latent image developing method | |
JPS576873A (en) | Developing method for electrostatic latent image | |
JPS5538522A (en) | Electrophotographic type image recording method | |
JPS57104159A (en) | Toner density detecting method | |
JPH0140348B2 (en) | ||
JPS5517143A (en) | Two color recording method | |
JPH0140347B2 (en) | ||
JPS55157769A (en) | Developing method of electrostatic latent image | |
JPS556338A (en) | Electrophotographic copying method | |
GB1479787A (en) | Xerographic reproduction apparatus | |
JPS5672466A (en) | Electrophotographic copying method | |
JPS56161564A (en) | Normal and reversal copying method | |
JPS5670560A (en) | Image stabilizing method | |
JPS5569156A (en) | Recording method | |
JPS5573058A (en) | Electrostatic latent image developing method | |
JPS575066A (en) | Developing method of electrostatic latent image |