Method of and apparatus for manipulating tows of filter material for tobacco smoke
US6334243B1 · kind B1 · utility
1Cited by
7References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 5, 2001 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Jul 5, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/0204
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A tow of filamentary filter material for tobacco smoke is stretched between an upstream pair and a downstream pair of advancing rolls. Suction nozzles are provided to evacuate air from those portions of the path for the tow which are located immediately upstream and immediately downstream of the path section at the nip of the downstream advancing rolls. This prevents eddying of air at the nip and a fluttering of filaments of the tow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.