Patent · US Expired

Tobacco dryers

US6185843A · kind A · utility

1Cited by

4References

14Claims

0Family size

Assignee

British American Tobacco (Investments) Limited · GB

Inventors

William J. Stone · Southampton, GB
Ian Ernest Tatham · Coulsdon, GB
Werner Hirsch · Hamburg, DE
Arno Weiss · Norderstedt, DE

Key dates

Filing date	Nov 30, 1999
Grant date	Feb 13, 2001
Priority date	—
Expiry date	Nov 30, 2019

Classification

Technology area (CPC A)Human Necessities
CPC primaryA24B3/04
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A pneumatic conveyance tobacco dryer which includes a conveyance duct having a first portion, a second, upwardly extending portion and a third, curved portion intercommunicating the first and second portions. A tobacco feed chute extends downwardly and opens into the second portion of the duct. The geometry of the dryer at and in the region of the feed chute is such as to effect the object of reducing the contact of tobacco particles with the inner surfaces of the conveyance duct.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.