JPS55142363A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPS55142363A JPS55142363A JP5114179A JP5114179A JPS55142363A JP S55142363 A JPS55142363 A JP S55142363A JP 5114179 A JP5114179 A JP 5114179A JP 5114179 A JP5114179 A JP 5114179A JP S55142363 A JPS55142363 A JP S55142363A
- Authority
- JP
- Japan
- Prior art keywords
- latent image
- electrode
- potential
- voltage
- image potential
- 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
- Combination Of More Than One Step In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE: To detect latent image potential with high precision in a simple construction, by discontinuously cutting electric force lines with a tuning fork vibrating according to piezoelectric elements, and allowing a measuring electrode to generate an AC signal, whose amplitude is proportional to a latent image potential on a recording material.
CONSTITUTION: On applying DC voltage to piezoelectric elements 84 comprising a drive piezoelectric element and a feedback piezoelectric element, tuning fork 82 vibrates automatically at the resonance frequency and chopper electrode 83 composed of one end of fork 82 repeats opening and closing of gap 88 of shield 81, resulting in cutting discontinuously electric force lines due to a latent image potential formed on photosensitive drum 47. As a result, AC voltage having an amplitude proportional to the voltage difference between the surface potential of drum 47 and electrode 83 is induced in measuring electrode 85 provided on print substrate 86, the latent image potential is detected at high precision in a simple construction, permitting control of image formation to be made exactly and a stable image to be formed.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5114179A JPS55142363A (en) | 1979-04-24 | 1979-04-24 | Image forming device |
US06/141,885 US4367948A (en) | 1979-04-24 | 1980-04-21 | Surface potential electrometer and image forming apparatus using the same |
GB8013382A GB2050633B (en) | 1979-04-24 | 1980-04-23 | Surface potential electrometer and image forming apparatus using the same |
DE19803015859 DE3015859A1 (en) | 1979-04-24 | 1980-04-24 | SURFACE POTENTIAL ELECTROMETER AND IMAGING DEVICE EQUIPPED WITH THIS |
US06/714,574 US4683436A (en) | 1979-04-24 | 1985-03-21 | Surface potential electrometer and image forming apparatus using the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5114179A JPS55142363A (en) | 1979-04-24 | 1979-04-24 | Image forming device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55142363A true JPS55142363A (en) | 1980-11-06 |
JPS6361663B2 JPS6361663B2 (en) | 1988-11-29 |
Family
ID=12878535
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5114179A Granted JPS55142363A (en) | 1979-04-24 | 1979-04-24 | Image forming device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55142363A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50145U (en) * | 1973-05-02 | 1975-01-06 | ||
JPS537276A (en) * | 1976-07-08 | 1978-01-23 | Kato Giichirou | Ddc bias type field strength measuring instrument |
JPS55146052A (en) * | 1979-03-18 | 1980-11-14 | Ricoh Co Ltd | Noise reduction circuit in noncontact type potentiometer |
-
1979
- 1979-04-24 JP JP5114179A patent/JPS55142363A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50145U (en) * | 1973-05-02 | 1975-01-06 | ||
JPS537276A (en) * | 1976-07-08 | 1978-01-23 | Kato Giichirou | Ddc bias type field strength measuring instrument |
JPS55146052A (en) * | 1979-03-18 | 1980-11-14 | Ricoh Co Ltd | Noise reduction circuit in noncontact type potentiometer |
Also Published As
Publication number | Publication date |
---|---|
JPS6361663B2 (en) | 1988-11-29 |
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