Multifeed detector
US4203586A · kind A · utility
26Cited by
5References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 28, 1978 |
| Grant date | May 20, 1980 |
| Priority date | — |
| Expiry date | Jun 28, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H7/12
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A multifeed detection system is disclosed that includes a drag roll which is in contact with and loaded against a driven feed belt. A slip clutch applies a torque to the drag roll. The drag roll is in synchronism with a constant speed motor that drives the feed belt. A double sheet entering the nip between the drag roll and the feed belt will cause the drag roll to hesitate with the hesitation being detected by a sensor that activates shut-down of the feeding system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.