Sheet observer with a limited number of sheet sensors
US8109506B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2009 |
| Grant date | Feb 7, 2012 |
| Priority date | — |
| Expiry date | Oct 23, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2553/416
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method and system for determining sheet position and orientation of a sheet as the sheet moves along a feed path is provided herein. The method includes moving the sheet along the feed path and past at least one point sensor to measure a first position of the sheet relative to a first reference axis coinciding with the process direction of the feed path. Next, the method provides for moving the sheet along the feed path and past at least one linear array sensor to measure a second position of the sheet relative to a second reference axis disposed perpendicular to the first reference axis and an angular orientation of the sheet in the reference plane relative to a third reference axis perpendicular to the reference plane. After that, a sheet velocity is determined. Then, one or more estimated sheet positions along the feed path are determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.