JPS5768851A - Copying device - Google Patents
Copying deviceInfo
- Publication number
- JPS5768851A JPS5768851A JP55145266A JP14526680A JPS5768851A JP S5768851 A JPS5768851 A JP S5768851A JP 55145266 A JP55145266 A JP 55145266A JP 14526680 A JP14526680 A JP 14526680A JP S5768851 A JPS5768851 A JP S5768851A
- Authority
- JP
- Japan
- Prior art keywords
- scale factor
- speed
- drum
- variable scale
- scanning
- 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.)
- Granted
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
- G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
- G03G15/28—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning
- G03G15/30—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning in which projection is formed on a drum
- G03G15/305—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning in which projection is formed on a drum with special means to synchronize the scanning optic to the operation of other parts of the machine, e.g. photoreceptor, copy paper
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Variable Magnification In Projection-Type Copying Machines (AREA)
- Control Or Security For Electrophotography (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Abstract
PURPOSE:To increase a copying a speed in a double scale factor or other variable scale factor mode, by controlling a rotary speed of a drum and a scanning speed of a scanning means in accordance with an input data for designating and selecting a variable scale factor. CONSTITUTION:In case the pre-processing has ended and the copy operation has started, a rotary speed of a drum 1, and a scanning speed of scanning means such as an exposure lamp 23, mirror systems 24, 25, a lens 30, etc. are controlled in accordance with a variable scale factor which is designated and selected by a manual input means, and when an equal scale factor data is received, a sequence computer decides it, rotates the drum 1 at a high speed, and in the event of a variable scale factor of reduction and expansion, the drum 1 is delayed by 30msec. and is rotated at a low speed, and subsequently, a lens 30 is set to a desired position. In case of a variable scale factor, the drum 1 is made to execute another rotation in order to perform running-in for switching to a low speed from a high speed, and to stabilize the potential.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55145266A JPS5768851A (en) | 1980-10-17 | 1980-10-17 | Copying device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55145266A JPS5768851A (en) | 1980-10-17 | 1980-10-17 | Copying device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5768851A true JPS5768851A (en) | 1982-04-27 |
JPH0152751B2 JPH0152751B2 (en) | 1989-11-09 |
Family
ID=15381150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55145266A Granted JPS5768851A (en) | 1980-10-17 | 1980-10-17 | Copying device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5768851A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58195838A (en) * | 1982-05-11 | 1983-11-15 | Canon Inc | Controller for scanning of document |
JPS59159153A (en) * | 1983-02-28 | 1984-09-08 | Canon Inc | Reproducing and outputting device of image |
JPS63101865A (en) * | 1986-10-17 | 1988-05-06 | Ricoh Co Ltd | Controller for copying machine |
-
1980
- 1980-10-17 JP JP55145266A patent/JPS5768851A/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58195838A (en) * | 1982-05-11 | 1983-11-15 | Canon Inc | Controller for scanning of document |
JPS59159153A (en) * | 1983-02-28 | 1984-09-08 | Canon Inc | Reproducing and outputting device of image |
JPS63101865A (en) * | 1986-10-17 | 1988-05-06 | Ricoh Co Ltd | Controller for copying machine |
Also Published As
Publication number | Publication date |
---|---|
JPH0152751B2 (en) | 1989-11-09 |
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