Dual cross beam sensor system and method for measuring lead edge and/or trail edge media curl
US8234092B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2010 |
| Grant date | Jul 31, 2012 |
| Priority date | — |
| Expiry date | Oct 24, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00662
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method for measuring a lead edge and/or a trail edge media curl utilizing a dual cross beam sensor. The dual cross beam sensor includes one or more pairs of emitters (e.g., a pair to two pairs of emitters) and one or more detectors positioned sequentially in a media path so that a media passes via dual cross beams. Timing data with respect to the media can be measured as the media crosses via the dual cross beam sensor from a leading edge and/or trailing edge. A true instantaneous media speed and a curl height (i.e., media tip height or media curvature) can be simultaneously calculated from the timing data associated with the lead edge/trail edge with respect to each single cross beams of the dual cross beam sensor. An average curl height can be then calculated to enhance the accuracy of the media curl measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.