JPS56159657A - Image stabilizing method - Google Patents
Image stabilizing methodInfo
- Publication number
- JPS56159657A JPS56159657A JP6441880A JP6441880A JPS56159657A JP S56159657 A JPS56159657 A JP S56159657A JP 6441880 A JP6441880 A JP 6441880A JP 6441880 A JP6441880 A JP 6441880A JP S56159657 A JPS56159657 A JP S56159657A
- Authority
- JP
- Japan
- Prior art keywords
- controller
- moisture absorption
- density
- drum
- voltage
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/20—Humidity or temperature control also ozone evacuation; Internal apparatus environment control
- G03G21/203—Humidity
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Atmospheric Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photoreceptors In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
- Control Of Non-Electrical Variables (AREA)
Abstract
PURPOSE:To prevent change of image density and to stabilize an image, by measuring the optical density of the surface of a photoreceptor containing a material changing in color development due to moisture absorption in order to detect a state of moisture absorption and controlling an image formation process in accordance with its moisture absorption state. CONSTITUTION:A photosensitive drum 1 is rotated and the output of a sensor 15 detecting the optical reflection density of the surface of said drum 1 is fed to a density measuring device 17, converted into a digital signal with a converter 18, and fed to a controller 19. When the controller 19 receives an output value corresponding to the optical reflection density of the surface of the drum 1 DD=0.3 higher than the value corresponding to that of the surface in a standard low moisture absorption state or in a dry state, DD=0.1, the controller 19 controls a voltage controller 21 in order to correct drop of charge potential and increase of dark decay due to the moisture absorption of the drum 1, decides the voltage to be applied to a corona charger 2, applies the voltage, and starts an image formation process. When the controller 19 receives a lower output value than that corresponding to the reflection density DD=0.1, it applies a prescribed voltage immediately to the corona charger 2, and starts the image formation process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6441880A JPS56159657A (en) | 1980-05-15 | 1980-05-15 | Image stabilizing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6441880A JPS56159657A (en) | 1980-05-15 | 1980-05-15 | Image stabilizing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56159657A true JPS56159657A (en) | 1981-12-09 |
Family
ID=13257704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6441880A Pending JPS56159657A (en) | 1980-05-15 | 1980-05-15 | Image stabilizing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56159657A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59113453A (en) * | 1982-12-20 | 1984-06-30 | Ricoh Co Ltd | Copying machine |
| JPS6247067A (en) * | 1985-08-26 | 1987-02-28 | Matsushita Graphic Commun Syst Inc | Electrophotographic recorder |
-
1980
- 1980-05-15 JP JP6441880A patent/JPS56159657A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59113453A (en) * | 1982-12-20 | 1984-06-30 | Ricoh Co Ltd | Copying machine |
| JPH0581900B2 (en) * | 1982-12-20 | 1993-11-16 | Ricoh Kk | |
| JPS6247067A (en) * | 1985-08-26 | 1987-02-28 | Matsushita Graphic Commun Syst Inc | Electrophotographic recorder |
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