Media sensor apparatus using a two component media sensor for media absence detection
US7205561B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2004 |
| Grant date | Apr 17, 2007 |
| Priority date | — |
| Expiry date | Feb 11, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J11/0095
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An imaging apparatus includes a media support surface. A light source and a light detector are positioned in relation to a reflective surface such that when a sheet of print media covers the reflective surface, a reflected specular light component of a light beam is received by the light detector, and when the reflective surface is not covered, the reflective surface directs the reflected specular light component of the light beam away from the detector. The signal strength of the output from the light detector when receiving a diffuse light component reflected from the reflective surface is less than the signal strength of the output from the light detector when receiving the reflected specular light component that is reflected from a low reflectance print media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.