Linefeed calibration method for a printer
US6940618B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 2000 |
| Grant date | Sep 6, 2005 |
| Priority date | — |
| Expiry date | Apr 27, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J11/42
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A linefeed calibration method for identifying media advancement errors utilizes plural test patterns, including both a base pattern and an overlay pattern that are printed overlying each other to form an interference pattern. A sensor detects overall alignment of the interference pattern. That overall alignment is compared to alignment of at least a second interference pattern to identify a linefeed advance error. The error is correlated to a position on a media advancement mechanism such as a roller. A processor then adjusts the media advancement mechanism to correct the identified media advancement error. Under-advance errors, over-advance errors and skew errors may be identified using the described method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.