Title:
IMAGE FORMING DEVICE
Document Type and Number:
WIPO Patent Application WO/1997/030851
Kind Code:
A1
Abstract:
According to the kind of paper sheet specified through an operation unit (111) by the user, the environmental temperature detected by a thermistor (110), and the spacing between the paper sheet and a paper sensor, detected by a lift height sensor (113), respectively, the correction values for the start and end positions where the printing heads start and end the printing in a horizontal direction are beforehand stored in a memory (112). Before printing, a CPU (104) detects the paper edge positions of the paper sheet on the basis of the output from a paper sensor (303), and reads the corresponding correction values from the memory (112) according to the kind of paper sheet, the environmental temperature and the lift height. A window control unit (106) corrects the paper edge position with the correction values, thereby generating a window signal which controls the side margins of the paper sheet. In accordance with the window signal, a head control unit (105) controls the heads (103) for the respective colors to precisely determine printable regions extending horizontally from the printing start positions to the printing end positions.
Inventors:
MATSUDA YUJI (JP)
Application Number:
PCT/JP1997/000506
Publication Date:
August 28, 1997
Filing Date:
February 24, 1997
Export Citation:
Assignee:
COPYER CO (JP)
MATSUDA YUJI (JP)
MATSUDA YUJI (JP)
International Classes:
B41J11/00; B41J13/00; B41J29/42; B41J29/44; B41J29/50; (IPC1-7): B41J29/50
Foreign References:
| JPH04223182A | 1992-08-13 | |||
| JPH0532026A | 1993-02-09 | |||
| JPH04250086A | 1992-09-04 | |||
| JPH04339203A | 1992-11-26 | |||
| JPH0656307A | 1994-03-01 | |||
| JPH04163180A | 1992-06-08 | |||
| JPH05104710A | 1993-04-27 | |||
| JPH04247973A | 1992-09-03 | |||
| JPH04141422A | 1992-05-14 |
Other References:
See also references of EP 0884197A4
None
None
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