Ventilated cigarettes
US4331165A · kind A · utility
1Cited by
8References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1980 |
| Grant date | May 25, 1982 |
| Priority date | — |
| Expiry date | Dec 29, 2000 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24C5/607
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Ventilated cigarettes are made by perforating the wrapper of each filter over an area which lies within pre-formed perforations in the uniting band joining the filter to the tobacco rod. The filter wrappers may be perforated by pins on a rolling plate and fluted drum between which filter portions cut from longer filter rods are rolled to stagger the portions so that they can then be pushed into a single row.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.