Image forming device using multiple factors to adjust print position
US6120196A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 21, 1998 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Aug 21, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J29/44
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
According to the type 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 type 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.