Coaxial filter cigarette
US5439011A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1994 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Jun 8, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/043
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The coaxial filter cigarette according to the invention contains of a coaxial rod portion and a coaxial filter element. The rod portion contains an inner core of a material glowing or smouldering substantially residue-free, in particular tobacco material, which is surrounded by a wrapper which in turn is surrounded by an outer jacket of a tobacco and/or non-tobacco material. A wrapper of an air-permeable material surrounds the outer jacket. The coaxial filter element has a filter core with an air-impermeable wrapper. A filter jacket having a diameter corresponding to the diameter of the outer jacket coaxially surrounds the filter core and its wrapper. An air-impermeable wrapper serving also to connect the rod portion and filter element surrounds the filter jacket. A ventilation zone is worked into the air-impermeable wrapper for the filter jacket. In the transition region between the rod portion and the filter element a smoke mixing zone is formed for defined variation of the smoke mixture leaving the rod portion before it flows into the filter element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.