Method and apparatus for print media detection
US6464417B2 · kind B2 · utility
4Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2001 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Dec 11, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2553/412
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A multi-purpose, transmissive paper sensor includes a light beam projector and light detector having an analog output signal. Changes in the output signal from an open loop condition indicate the presences of at least one print medium being in the field-of-view of the sensor. Output signals indicative of print media leading edge, trailing edge, and number of sheets interrupting the light beam provide improved print media transport control for hard copy apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.