Multi component cigarette filter assembly
US8113211B2 · kind B2 · utility
0Cited by
8References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2007 |
| Grant date | Feb 14, 2012 |
| Priority date | — |
| Expiry date | Aug 23, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/0225
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A cigarette filter assembly comprises a hollow paper tube with a spaced apart solid fiber plugs inside the tube together with granular filter material in the spaces between the plugs. Energy activated adhesive is only between the solid filter plugs and interior surface portions of the tube. After the spaced apart solid fiber plugs are within the tube the adhesive is activated to secure the plugs to the tube. The energy activated adhesive is only on selected portions of the hollow tube where the solid fiber plugs are located or alternatively the adhesive is only on the exterior surface portions of the solid fiber plugs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.