JPS5669652A - Copying machine provided with copying processing device which is controllable according to environmental change - Google Patents
Copying machine provided with copying processing device which is controllable according to environmental changeInfo
- Publication number
- JPS5669652A JPS5669652A JP14682779A JP14682779A JPS5669652A JP S5669652 A JPS5669652 A JP S5669652A JP 14682779 A JP14682779 A JP 14682779A JP 14682779 A JP14682779 A JP 14682779A JP S5669652 A JPS5669652 A JP S5669652A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- decrease
- amount
- measured
- 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
Landscapes
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE: To stabilize image densities by measuring the moisture abosorption amount of sheets and controlling a high-voltage transformer for transfer charging or separation and destaticization according to the same.
CONSTITUTION: The resistance value of the sheet held between an upper register roller 51 and a lower register roller 52 is measured. Now, when the measured resistance value of the sheet is lower than a standard permissible range, said measured value is fed back to a control system, and the applied voltage of a transfer charger 18 is increased and the amount of charge supply is increased according to the program having beforehand been set in the memory device in said control unit. Thereby, the decrease in the field strength between the sheet and photosensitive drum and the decrease in the charge on the sheet owing to the change in the resistance of the sheet are compensated and the decrease in the transfer efficiency of the toner images on the photoreceptor is thus prevented. Further, the applied voltage of a separating destaticizer 19 is also controlled, whereby the residual charge amount of the sheet after passage through the destaticizer 19 is decreased.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14682779A JPS5669652A (en) | 1979-11-13 | 1979-11-13 | Copying machine provided with copying processing device which is controllable according to environmental change |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14682779A JPS5669652A (en) | 1979-11-13 | 1979-11-13 | Copying machine provided with copying processing device which is controllable according to environmental change |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5669652A true JPS5669652A (en) | 1981-06-11 |
Family
ID=15416411
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14682779A Pending JPS5669652A (en) | 1979-11-13 | 1979-11-13 | Copying machine provided with copying processing device which is controllable according to environmental change |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5669652A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0660197A2 (en) * | 1993-12-20 | 1995-06-28 | Konica Corporation | Image forming apparatus equipped with a device to measure a resistance of a transfer sheet |
US5682575A (en) * | 1993-10-08 | 1997-10-28 | Oki Electric Industry Co., Ltd. | Electrophotographic recording apparatus having transfer voltage control device |
-
1979
- 1979-11-13 JP JP14682779A patent/JPS5669652A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5682575A (en) * | 1993-10-08 | 1997-10-28 | Oki Electric Industry Co., Ltd. | Electrophotographic recording apparatus having transfer voltage control device |
EP0660197A2 (en) * | 1993-12-20 | 1995-06-28 | Konica Corporation | Image forming apparatus equipped with a device to measure a resistance of a transfer sheet |
EP0660197A3 (en) * | 1993-12-20 | 1995-08-02 | Konishiroku Photo Ind |
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