JPS5622445A - Image forming unit - Google Patents
Image forming unitInfo
- Publication number
- JPS5622445A JPS5622445A JP9778879A JP9778879A JPS5622445A JP S5622445 A JPS5622445 A JP S5622445A JP 9778879 A JP9778879 A JP 9778879A JP 9778879 A JP9778879 A JP 9778879A JP S5622445 A JPS5622445 A JP S5622445A
- Authority
- JP
- Japan
- Prior art keywords
- light
- exposure
- adjustment
- variable resistor
- copying
- 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
- 230000001419 dependent effect Effects 0.000 abstract 1
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 abstract 1
- 230000003595 spectral effect Effects 0.000 abstract 1
Landscapes
- Dry Development In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Abstract
PURPOSE:To make subtle density adjustment possible, by switching the electric power quantity for the lamp adjusted by a key to the adjustment quantity for standard light-exposure at a prescribed time after the end of copying and by inhibiting light quantity adjustment during light-exposure. CONSTITUTION:Variable resistor VR2 is provided for setting a light-exposure quantity and is arranged in the operation panel part of the copying machine as a light-exposure dial, and variable resistor VR3 is so operated that it becomes a proper value for the center value of variable resistor VR2 to perform fine adjustment of the light-exposure quantity, and further, variable resistor VR1 is operated to determine an adjustable voltage range by variable resistor VR2. Then, after the end of copying, the electric power quantity for lamp LA is switched to the adjustment quantity for standard light-exposure at a prescribed time, and further, light quantity adjustment is inhibited during light-exposure. Filter 3 to cut infrared rays is inserted to the light path of the optical system to prevent the bad influence upon the copied image dependent upon change of the spectral distribution characteristic of the light source for change of brightness of the light source.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9778879A JPS5622445A (en) | 1979-07-31 | 1979-07-31 | Image forming unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9778879A JPS5622445A (en) | 1979-07-31 | 1979-07-31 | Image forming unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5622445A true JPS5622445A (en) | 1981-03-03 |
Family
ID=14201541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9778879A Pending JPS5622445A (en) | 1979-07-31 | 1979-07-31 | Image forming unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5622445A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57188074A (en) * | 1981-05-14 | 1982-11-18 | Fuji Xerox Co Ltd | Toner density adjusting device for copying machine |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5466137A (en) * | 1977-11-07 | 1979-05-28 | Fuji Xerox Co Ltd | Method of controlling duplicator |
-
1979
- 1979-07-31 JP JP9778879A patent/JPS5622445A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5466137A (en) * | 1977-11-07 | 1979-05-28 | Fuji Xerox Co Ltd | Method of controlling duplicator |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57188074A (en) * | 1981-05-14 | 1982-11-18 | Fuji Xerox Co Ltd | Toner density adjusting device for copying machine |
JPH0373866B2 (en) * | 1981-05-14 | 1991-11-25 |
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