JPS649473A - Device for correcting tip position of paper - Google Patents
Device for correcting tip position of paperInfo
- Publication number
- JPS649473A JPS649473A JP62165830A JP16583087A JPS649473A JP S649473 A JPS649473 A JP S649473A JP 62165830 A JP62165830 A JP 62165830A JP 16583087 A JP16583087 A JP 16583087A JP S649473 A JPS649473 A JP S649473A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- exposure
- timing
- sensor
- tip
- 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
- Paper Feeding For Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE:To accurately match the tip position of paper with an image position by measuring time required from the generation of a timing signal to be a reference up to the arrival of the paper tip at a paper chip detecting sensor and correcting the paper tip position in each paper feeding port based on a measured value. CONSTITUTION:Paper fed from paper feeding rolls 4a-4c is supplied to a photosensitive drum 1 through a 1st paper sensor 5, a timing roll 6 and a 2nd paper sensor 7 and an image is transferred to the paper. Paper feeding and exposure timing is controlled by a CPU 21, exposure based upon laser beams 2 is started after time (t) from the detection of the tip of the paper fed from the rolls 4a-4c by the sensor 5 and the roll 6 is set up so as to be turned on after time T from the start of exposure. The time required from the previously calculated exposure start up to the ON of the roll 6 is stored in a main memory 25 and the timing of paper feeding or exposure start is corrected in each paper feeding port. Thus, the paper tip position can be accurately matched with the image position.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62165830A JPS649473A (en) | 1987-07-01 | 1987-07-01 | Device for correcting tip position of paper |
| US07/213,821 US4956651A (en) | 1987-07-01 | 1988-06-30 | Image forming apparatus which sheet detection and timing control |
| DE3822387A DE3822387A1 (en) | 1987-07-01 | 1988-07-01 | IMAGE GENERATION DEVICE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62165830A JPS649473A (en) | 1987-07-01 | 1987-07-01 | Device for correcting tip position of paper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS649473A true JPS649473A (en) | 1989-01-12 |
Family
ID=15819812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62165830A Pending JPS649473A (en) | 1987-07-01 | 1987-07-01 | Device for correcting tip position of paper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS649473A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0396977A (en) * | 1989-09-08 | 1991-04-22 | Canon Inc | Image recording device |
| JPH05212930A (en) * | 1992-02-06 | 1993-08-24 | Fujitsu Ltd | Printer |
| JP2012230240A (en) * | 2011-04-26 | 2012-11-22 | Sharp Corp | Image forming apparatus |
-
1987
- 1987-07-01 JP JP62165830A patent/JPS649473A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0396977A (en) * | 1989-09-08 | 1991-04-22 | Canon Inc | Image recording device |
| JPH05212930A (en) * | 1992-02-06 | 1993-08-24 | Fujitsu Ltd | Printer |
| JP2012230240A (en) * | 2011-04-26 | 2012-11-22 | Sharp Corp | Image forming apparatus |
| US10474086B2 (en) | 2011-04-26 | 2019-11-12 | Sharp Kabushiki Kaisha | Image forming apparatus capable of adjusting print position of image on recording paper |
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