Sheet feeder capable of immediately detecting a paper jam
US6880819B2 · kind B2 · utility
2Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2003 |
| Grant date | Apr 19, 2005 |
| Priority date | — |
| Expiry date | Aug 19, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2553/414
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A sheet feeder capable of immediately detecting a paper jam includes a housing, a motor attached to the housing, a driving roller, a driven roller, a rotation speed detector and a control circuit. The motor drives the driving roller to rotate, and the driving roller drives the driven roller to rotate. The driven roller cooperates with the driving roller to feed a sheet therethrough. The rotation speed detector detects the rotation speed of the driven roller and outputs a rotation speed signal. The control circuit receives the rotation speed signal to judge whether or not a paper jam occurs according to the rotation speed signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.