JPS5492226A - Optical scanning device for magnification variable type copier - Google Patents
Optical scanning device for magnification variable type copierInfo
- Publication number
- JPS5492226A JPS5492226A JP15775077A JP15775077A JPS5492226A JP S5492226 A JPS5492226 A JP S5492226A JP 15775077 A JP15775077 A JP 15775077A JP 15775077 A JP15775077 A JP 15775077A JP S5492226 A JPS5492226 A JP S5492226A
- Authority
- JP
- Japan
- Prior art keywords
- cam
- photoreceptor
- optical scanning
- magnification
- uniform
- 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
- Variable Magnification In Projection-Type Copying Machines (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Abstract
PURPOSE:To prevent the non-uniform deterioration of a photoreceptor and abtain a copied image of uniform density by varying the operation start period of an optical scanning system is accordance with the magnification, and maintaining the leading tip of an electrostatic latent image formed on the photoreceptor constant at all times. CONSTITUTION:In the magnification 1 copying, cam 23 is disposed with the cam 23 shifted relative to cam 22 such that the time required for the cam 23 till it makes microswitch MS2 on since the start of rotation of photosensitive drum 7 may be made longer than the time for the equal size copying. Therefore MS2 is made on later than microswitch MS1, and electromagnetic clutch 29 is stimulated to attract sprocket 27. Rotation of motor M1 is transmitted to pulley 19 via sprockets 15, 27, 34 so that the optical scanning system of shift mirrors 3, 4 starts its return due to the wire 20. Thus, the non-uniform deterioration of the photoreceptor can be prevented in order to abtain the copied image of uniform density by maintaining the leading tip of an electrostatic latent image formed on the photoreceptor constant.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15775077A JPS5492226A (en) | 1977-12-29 | 1977-12-29 | Optical scanning device for magnification variable type copier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15775077A JPS5492226A (en) | 1977-12-29 | 1977-12-29 | Optical scanning device for magnification variable type copier |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5492226A true JPS5492226A (en) | 1979-07-21 |
Family
ID=15656521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15775077A Pending JPS5492226A (en) | 1977-12-29 | 1977-12-29 | Optical scanning device for magnification variable type copier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5492226A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8633640B2 (en) | 2008-12-25 | 2014-01-21 | Ngk Spark Plug Co., Ltd. | Spark plug |
-
1977
- 1977-12-29 JP JP15775077A patent/JPS5492226A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8633640B2 (en) | 2008-12-25 | 2014-01-21 | Ngk Spark Plug Co., Ltd. | Spark plug |
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