Dual nip multi-feed detection and control system
US8437646B2 · kind B2 · utility
1Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2012 |
| Grant date | May 7, 2013 |
| Priority date | — |
| Expiry date | Aug 15, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/004
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A paper feed system for use in a printing apparatus that detects multi-feeds and separates all sheets while allowing a single sheet to continue into the machine includes a nip with a drive roller for feeding sheets. A reversible pressure roller downstream of the drive roller is connected to a motor, but idles in the direction of the paper feed in normal operation. When a multi-feed is detected, the motor is turned ON and the reversible pressure roll actuated by a controller. The reversible pressure roller has more friction with the sheet in its contact than the friction between sheets. This drives the sheet in contact backwards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.