With Electrical Or Radiant Energy Patents (Class 131/299)
  • Method of and apparatus for curing tobacco
    Patent number: 4559956
    Abstract: In the curing of tobacco leaf in a curer heated air is circulated through the curer and controlled so that a first temperature is maintained in the curer for a given period of time. During this period the relative humidity level is reduced to a desired level. Thereafter a maximum predetermined temperature difference is maintained between upper and lower zones in the curer to dry the leaf.
    Type: Grant
    Filed: February 28, 1983
    Date of Patent: December 24, 1985
    Assignee: Modsa (Proprietary) Limited
    Inventors: Jan H. De Lange, Ernest Fick
  • Process for the preparation of aromatic substances
    Patent number: 4359059
    Abstract: Aromatic substances to be applied to tobacco to improve aroma characteristics are prepared by exposing an alcoholic extract, which contains diterpenes and has been isolated from the surface resin of fresh tobacco plants, parts or from gum originating from tobacco flowers, to ultraviolet light and oxygen.
    Type: Grant
    Filed: March 5, 1981
    Date of Patent: November 16, 1982
    Assignee: B.A.T. Cigaretten-Fabriken GmbH
    Inventors: Ursula Brummer, Volker Heemann
  • Method of curing tobacco
    Patent number: 4355648
    Abstract: Harvested green tobacco is cured by photobleaching followed by thermal browning. Photobleaching is preferably effected after incubation in vapors of an organic liquid or steam.
    Type: Grant
    Filed: December 9, 1980
    Date of Patent: October 26, 1982
    Assignee: Philip Morris, Incorporated
    Inventors: Gordon H. Bokelman, Dewitt J. Gooden, III
  • Process for the preparation of aromatic substances
    Patent number: 4351346
    Abstract: Aromatic substances to be applied to tobacco to improve aroma characteristics are prepared by exposing an alcoholic extract, which contains carotenoids and may additionally contain diterpenes and has been isolated from fresh tobacco plants, to ultraviolet light and oxygen. Additionally, aromatic substances may be produced from xanthophyll containing plant extracts by the same method.
    Type: Grant
    Filed: March 5, 1981
    Date of Patent: September 28, 1982
    Assignee: B.A.T. Cigaretten-Fabriken GmbH
    Inventors: Ursula Brummer, Volker Heeman