Retard roller and retard roller module having such retard roller
US8348257B2 · kind B2 · utility
0Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2011 |
| Grant date | Jan 8, 2013 |
| Priority date | — |
| Expiry date | Aug 12, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2515/32
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A retard roller of an automatic document feeder provides a frictional force to separate plural documents from each other. The retard roller can provide a first damping torque and a second damping torque with different directions. The second damping torque is smaller than the first damping torque. As such, the frictional force exerted on the document is reduced for returning the document out of the automatic document feeder. A retard roller module having such a retard roller is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.