Transmissive optical sensing of leading edges of media sheets advanced substantially adjacent to one another
US6952536B2 · kind B2 · utility
1Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2003 |
| Grant date | Oct 4, 2005 |
| Priority date | — |
| Expiry date | Mar 23, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00616
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of an embodiment of the invention is disclosed that advances media sheets through an image-forming device such that each successive pair of media sheets are advanced at least substantially adjacent to one another. The method transmissively optically senses a leading edge of each of the media sheets and a lagging edge of each of the media sheets. The method detects occurrence of an out-of-media sheets situation where a length of time after the lagging edge of one of the media sheets has been optically sensed exceeds a threshold length of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.