Tobacco processing
US4483353A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1982 |
| Grant date | Nov 20, 1984 |
| Priority date | — |
| Expiry date | Jul 19, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA24B15/24
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A tobacco-treatment process comprises mechanically expressing cell-sap from yellowed, substantially undried, tobacco-leaf material, impregnating the fibrous material remaining after the expression with said cell-sap or with parts or components of said cell-sap or with cell-sap expressed from other yellowed, substantially undried, tobacco leaf material, and drying the sap-impregnated material. The tobacco leaf material may comprise leaves harvested in a fully developed and mature state. The leaves may be at least partly yellow when harvested. They may have been yellowed by the application of a yellowing agent to tobacco plants or yellowing may have been effected or completed by heaping or rack-hanging the harvested leaves in an enclosed atmosphere, suitably with a relative humidity of 70% or more and a temperature in the range of 20.degree. to 40.degree. C. Ethylene gas may be introduced into the atmosphere to promote the yellowing. The tobacco leaf material may be cut before being subjected to cell-sap expression. The expression may be effected in at least two stages, suitably a first stage in which the mid ribs of the tobacco leaves are crushed and a second stage in which the cell…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.