Monitoring rod
US4685475A · kind A · utility
11Cited by
0References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1984 |
| Grant date | Aug 11, 1987 |
| Priority date | — |
| Expiry date | Nov 29, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S131/906
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Cigarette rod or cigarette filter rod comprising an outer, longitudinally seamed wrapper is monitored, to detect defects in the longitudinal seam, by directing, from a nozzle, a stream of air tangentially of the rod, whereby the air flows in Coanda effect contact with the rod, and audio detecting the presence or absence of air, at a location spaced from the nozzle, in accordance with the presence or absence of a seam defect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.