JPS55151664A - Ground density adjusting device of copying machine - Google Patents
Ground density adjusting device of copying machineInfo
- Publication number
- JPS55151664A JPS55151664A JP5909379A JP5909379A JPS55151664A JP S55151664 A JPS55151664 A JP S55151664A JP 5909379 A JP5909379 A JP 5909379A JP 5909379 A JP5909379 A JP 5909379A JP S55151664 A JPS55151664 A JP S55151664A
- Authority
- JP
- Japan
- Prior art keywords
- bias potential
- density
- time
- developing device
- adjusting device
- 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 eliminate ground stains by detecting the density of the original before it is subjected to exposure lighting and applying the bias potential corresponding to that density.
CONSTITUTION: An original 10 is detected of its density by a detector 14 while it is passing. the quantity of the transmitted or reflected light detected by the detector 14 is operated by a density detecting circuit 26 and is changed to an electric signal as a coefficient of transmission or reflection. This signal is stored for the necessary time from the time when it is detected until the time when bias potential is output to a developing device 22, by a density detection value memory device 27. The bias potential of the developing device 22 is set by a bias potential setter 28 and the required bias potential is applied to the developing device 22 at the specified time by a bias potential outputting device 29.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5909379A JPS55151664A (en) | 1979-05-16 | 1979-05-16 | Ground density adjusting device of copying machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5909379A JPS55151664A (en) | 1979-05-16 | 1979-05-16 | Ground density adjusting device of copying machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55151664A true JPS55151664A (en) | 1980-11-26 |
Family
ID=13103368
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5909379A Pending JPS55151664A (en) | 1979-05-16 | 1979-05-16 | Ground density adjusting device of copying machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55151664A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6177874A (en) * | 1984-09-25 | 1986-04-21 | Fuji Xerox Co Ltd | Copying machine |
-
1979
- 1979-05-16 JP JP5909379A patent/JPS55151664A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6177874A (en) * | 1984-09-25 | 1986-04-21 | Fuji Xerox Co Ltd | Copying machine |
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