Sheet conveying apparatus, printing apparatus, correction information acquiring apparatus, printing system, method of conveying sheets and method of acquiring correction information
US7963624B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2008 |
| Grant date | Jun 21, 2011 |
| Priority date | — |
| Expiry date | Jun 30, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J13/02
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Performed is conveying-error correction in accordance with the kind and the number of rollers that are actually involved in the conveying of a printing medium. Each of the rollers that are potentially involved in the conveying of the printing medium has a unique amount of eccentricity, and may affect the quality of image to be printed in a peculiar manner. To address this problem, a surface of the printing medium is divided into areas according to the number and the combination of the rollers that are actually involved in the conveying. A pattern each is printed for each of the areas thus formed while the pattern enables the detection of the conveying error. A correction value to correct the conveying error is calculated using each of the patterns. The correction values thus obtained are reflected in the conveying of the printing medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.