JPS57664A - Image form - Google Patents
Image formInfo
- Publication number
- JPS57664A JPS57664A JP7401880A JP7401880A JPS57664A JP S57664 A JPS57664 A JP S57664A JP 7401880 A JP7401880 A JP 7401880A JP 7401880 A JP7401880 A JP 7401880A JP S57664 A JPS57664 A JP S57664A
- Authority
- JP
- Japan
- Prior art keywords
- latent image
- potential
- image
- exposure
- trial
- 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
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
- G03G15/043—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for controlling illumination or exposure
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE:To obtain an always correct image contrast, by forming a preliminary latent image while changing exposure before forming a practicable latent image, measuring the potential of the trial latent image, and allowing an image contrast adjusting means to store its exposure for a given time when this measured value becomes a predetermined value. CONSTITUTION:A potential sensor 10 situated on the downstream of a corona discharger 3 detects the potential of a latent image on a photoreceptor 1. This sensor 10 measures the potential of a trial latent image on the photoreceptor 1 in the state where a lamp 13a is turned on and its intensity is changed whereas a lamp 13 for imagewise exposure, is turned off before the latent image to be used practically is formed. This measured value is fed back to a controller 11, where the measured value is compared with a predetermined target value, the potential of the trial latent image is approached to the target value by computing this difference with a certain constant or a function, thus permitting the exposure quantity determined by this computation to be set in the central part of a density adjusting dial, and a standard image to be obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7401880A JPS57664A (en) | 1980-06-02 | 1980-06-02 | Image form |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7401880A JPS57664A (en) | 1980-06-02 | 1980-06-02 | Image form |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57664A true JPS57664A (en) | 1982-01-05 |
Family
ID=13534943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7401880A Pending JPS57664A (en) | 1980-06-02 | 1980-06-02 | Image form |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57664A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60213964A (en) * | 1984-03-16 | 1985-10-26 | アグファ ゲーヴェルト アクチエンゲゼルシャフト | Method and apparatus for maintaining given potential ratio when electrostatically charged photosensitive layer is exposed to light |
JPH02102210U (en) * | 1989-01-30 | 1990-08-14 |
-
1980
- 1980-06-02 JP JP7401880A patent/JPS57664A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60213964A (en) * | 1984-03-16 | 1985-10-26 | アグファ ゲーヴェルト アクチエンゲゼルシャフト | Method and apparatus for maintaining given potential ratio when electrostatically charged photosensitive layer is exposed to light |
JPH02102210U (en) * | 1989-01-30 | 1990-08-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS55157756A (en) | Surface potential control unit | |
JPS5497038A (en) | Image density controller for zerographic copier | |
JPS53115233A (en) | Control for electrophotogtaphic copier | |
JPS5518667A (en) | Stabilization method of image density | |
JPS5393030A (en) | Copying process control method of electrophotographic copying machine | |
JPS53136838A (en) | Automatic controlling method of image quality in transfer type electrostatic copier | |
JPS57200054A (en) | Picture forming device | |
JPS5363021A (en) | Image control method | |
JPS57664A (en) | Image form | |
JPS53119049A (en) | Detecting and controlling method of toner contents in developer and device for the same | |
JPS5784463A (en) | Image former | |
JPS57164739A (en) | Copying apparatus | |
JPS5688142A (en) | Image density control device | |
JPS56161555A (en) | Controller of electrophotographic copying machine | |
JPS64582A (en) | Picture density controller | |
JPS6457282A (en) | Image forming device | |
JPS52138133A (en) | Electrophotography | |
JPS56128962A (en) | Latent image forming method of variable magnification device | |
JPS5356038A (en) | Control device for toner density | |
JPS57195257A (en) | Surface potential setter for photoreceptor in electrophotographic copier | |
JPS5722269A (en) | Electrophotographic method | |
JPS5437758A (en) | Electrostatic latent image developing method | |
JPS5770558A (en) | Method for correction of latent image potential | |
JPS6413172A (en) | Toner concentration control method | |
JPS5395043A (en) | Method and apparatus for detecting toner quantity on recording element |