Image forming device and sheet transport device
US7234695B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2003 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Feb 12, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2553/51
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
This sheet multifeed determination device is capable of accurately detecting a sheet multifeed state, and the sheet multifeed determination device includes: a separating member side sheet speed detecting part which detects a transport speed of a sheet surface on the separating member side of a sheet transported to a nip unit of a paper feed roll and a separating member pressure-contacting mutually; a multifeed sheet detecting part which detects presence of plural sheets in the course of being transported through the nip unit; and a multifeed state determination part which determines not to be in a multifeed state of sheets when the sheet speed detected by the separating member side sheet speed detecting part is V2≦0 and determines to be in the multifeed state of sheets in the case of V2>0 in a condition where the multifeed sheet detecting part detects multifed sheets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.