Apparatus for measuring smoke dilution in a vented-filter cigarette
US4171635A · kind A · utility
8Cited by
5References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1978 |
| Grant date | Oct 23, 1979 |
| Priority date | — |
| Expiry date | Oct 30, 1998 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24C5/3418
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
As a puff generator draws a volume of smoke and air through the vented-filter cigarette air is drawn from a ventilation cylinder to cause a piston to travel to a dead center position. The amount of movement of this piston is a measure of an amount of air drawn through the ventilation path of the filter by the puff generator. The amount of travel can be related to the total possible stroke of the piston so as to produce a digital read out of the degree of ventilation directly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.