Method of and apparatus for making a rod of fibrous material
US4875494A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 5, 1988 |
| Grant date | Oct 24, 1989 |
| Priority date | — |
| Expiry date | Feb 5, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24C5/3412
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A tobacco stream, which contains a surplus of tobacco and is converted into a rod-like filler by a trimming device serving to remove the surplus from successive increments of the stream, is monitored ahead of the surplus removing station by a device which forms signals denoting fluctuations of the surplus in the stream. Such signals are used to regulate the quantity of surplus in the stream. The signals can denote the mass of tobacco per unit length or multiple unit length of the stream, the density of successive unit lengths or multiple unit lengths of the stream, or the so-called standard deviation of the height or another parameter of the stream from a median value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.