Method and apparatus for manufacturing filters for smoking articles
US10757966B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2013 |
| Grant date | Sep 1, 2020 |
| Priority date | — |
| Expiry date | Jul 12, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/045
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
There is provided a method and apparatus for manufacturing filters for smoking articles. The method comprises providing hollow tubes (309) of filter material. Each hollow tube has an outer diameter and an inner diameter. The method further comprises providing filter inserts (205). Each filter insert (205) has a first portion having a cross sectional dimension larger than the inner diameter of the hollow tube. The method further comprises inserting each filter insert (205) into a hollow tube (309) of filter material. During inserting, the first portion of the filter insert (205) engages with the hollow tube (309) to retain the filter insert in the hollow tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.