Producing filler material, particularly for cigarette filters
US4593706A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1981 |
| Grant date | Jun 10, 1986 |
| Priority date | — |
| Expiry date | Aug 3, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24D3/0208
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Filler material, particularly for cigarette filters, is produced by feeding a stream of substantially continuous fibres of filter material onto a pin roller having a surface carrying sharp projections in the form of pins and the pin roller is driven at a speed such that the fibres are rapidly accelerated so as to be broken by the pins into irregular lengths and are projected from the roller in random orientations. The broken fibres may be collected as a stream for delivery to a rod-making unit by showering onto a conveyor band, by continuously rolling the fibres between cooperating rollers, or pneumatically. More than one stream could be supplied to the pin roller, so that the broken fibres can comprise a mixture of fibres of different filter materials. The broken fibres may be received on a substantially continuous carrier stream, comprising similar or different filtering material, before the fibres and carrier stream are formed into filter rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.