Manufacture of cigarettes
US4584870A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 20, 1977 |
| Grant date | Apr 29, 1986 |
| Priority date | — |
| Expiry date | Apr 20, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24C5/345
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for testing the wrappers of cigarettes for leaks includes means for producing a series of first electrical signals indicative of the leakage flow through the wrappers of successive cigarettes, a comparator device for producing an ejection signal to eject each faulty cigarette, and an averaging device which responds to the running average level of the first signals and continuously varies the limit of the first signal which results in the production of an ejection signal by the comparator device, whereby that limit is raised when the running average of the first signals increases, and is lowered when the running average of the first signals falls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.