Glue transfer apparatus for cigarette filters
US4252527A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 22, 1979 |
| Grant date | Feb 24, 1981 |
| Priority date | — |
| Expiry date | May 22, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24C5/472
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A filter is formed by placing increments of glue in spaced apart relation on a moving stream of plug wrap paper and thereafter depositing alternating fibrous filter sections on the glue increments. Particulate material is then deposited between the fibrous filter sections and the plug wrap paper wrapped about the filter sections to form an endless rod. Two-filter filter plugs are severed from the rod by cutting through the unglued fibrous filter section and thereafter the charges of particulate filter material are compacted by moving the unglued outer filter sections of each plug inwardly. Each plug is then joined to two tobacco columns and cut in half. The resultant filters each have a fibrous filter section at the exposed end glued to the plug wrap paper, a compacted particulate section and an unglued fibrous filter section at the tobacco end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.