Skew detector for inserter
US5130558A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 1991 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | May 29, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2513/40
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
In an inserter, a skew and misalignment detector for measuring skew misalignment of inserts that are conveyed on and along a conveyor comprises a plurality of photosensors disposed above the insert-conveying path in transverse relation thereto and a plurality of retroreflective targets disposed beneath the insert-conveying path in transverse relation thereto and directed toward the photosensors. Inserts obstruct the targets while being conveyed thereover. The photosensor signals are sampled in synchronism with the insert-conveying motion. The obtained signals are evaluated in relation to pre-established skew rejection threshold criteria in dependence on insert conveying speed. Inserts are diverted when the skew detector arrangement provides measures of skew and misalignment of inserts that exceed rejection threshold criteria.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.