Calibration apparatus
US9539835B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 2012 |
| Grant date | Jan 10, 2017 |
| Priority date | — |
| Expiry date | Nov 12, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J11/46
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A calibration apparatus is disclosed herein. An example includes a printing mechanism, a media control mechanism, a sensor, and a processor. The processor controls the printing mechanism to print a first pattern of first elements on a print medium and a second pattern of second elements on the print medium that are interleaved with the first elements. The processor also actuates the media control mechanism to advance the print medium, determines a centroid of at least one of the first elements based on a first measured reflectance by the sensor, and determines a centroid of at least one of the second elements based on a second measured reflectance by the sensor. The processor also determines a print medium advance error based on the at least one determined centroid of the first elements and the at least one determined centroid of the interleaved second elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.