JPS5444536A - Printing device with head for measuring electric potential - Google Patents
Printing device with head for measuring electric potentialInfo
- Publication number
- JPS5444536A JPS5444536A JP11094177A JP11094177A JPS5444536A JP S5444536 A JPS5444536 A JP S5444536A JP 11094177 A JP11094177 A JP 11094177A JP 11094177 A JP11094177 A JP 11094177A JP S5444536 A JPS5444536 A JP S5444536A
- Authority
- JP
- Japan
- Prior art keywords
- laser beam
- photoreceptor
- potential
- scanning
- region
- 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 provide a stable electrostatic latent images at all times and obtain a high quality hard copy at high speed by providing the head which measures the electric potential and faces the surface of a photoreceptor at the outside of a printing region within the light beam sacnning region.
CONSTITUTION: Electrostatic latent image of high contrast is formed by the process which comprises projecting the laser beam which rediates from laser oscillator 1-1 onto a rotating mirror which rotates at constant speed, scanning photoreceptor 1-14 with the laser beam thus swept horizontally, forming a pattern due to the difference of a surface potential on the surface of an insulating layer to be electrically charged, and thereafter exposing it to light. Electrode 1-21 which measures the electrostatic potential facing the surface of the photoreceptor 1-14 is disposed at the outside of printing region within the laser beam scanning region to provide the portion sconned and exposed by the laser beam and the dark portion, and respective electrostatic potential of each portion is measured. Besides, beam detector 2-1 consisting of photo-electric conversion element is provided to detect the start position of scanning for the purpose of determining its start. Thus, the stable and good image can be obtained.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11094177A JPS5444536A (en) | 1977-09-14 | 1977-09-14 | Printing device with head for measuring electric potential |
US06/184,563 US4377333A (en) | 1977-08-12 | 1980-09-05 | Recording apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11094177A JPS5444536A (en) | 1977-09-14 | 1977-09-14 | Printing device with head for measuring electric potential |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5444536A true JPS5444536A (en) | 1979-04-09 |
Family
ID=14548438
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11094177A Pending JPS5444536A (en) | 1977-08-12 | 1977-09-14 | Printing device with head for measuring electric potential |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5444536A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57154973A (en) * | 1981-03-19 | 1982-09-24 | Minolta Camera Co Ltd | Controller of electrostatic recorder |
-
1977
- 1977-09-14 JP JP11094177A patent/JPS5444536A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57154973A (en) * | 1981-03-19 | 1982-09-24 | Minolta Camera Co Ltd | Controller of electrostatic recorder |
JPS6151461B2 (en) * | 1981-03-19 | 1986-11-08 | Minolta Camera Kk |
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