Hollow cigarette
US5690127A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1996 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Apr 10, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D1/00
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A cigarette comprises a hollow rod for directing smoke and air from the lit end of the cigarette to a filter located at the mouth end of the cigarette. The rod is formed of tobacco material and/or other carbonaceous material, together with a binder and preferably an organic or inorganic salt. In one embodiment, the rod is a low density rod, which when lit burns in an inverted fire cone. In a second embodiment, a thin-walled rod is surrounded by a column of leaf tobacco. The thin-walled rod includes a salt, preferably calcium carbonate, in an amount preferably between 25% and 45%, which increases the combustion temperature. It also preferably is perforated to allow smoke generated in the tobacco column to be drawn into the hollow center passage. In either embodiment, the amount of wet particulate matter is reduced due to the improved combustion characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.