Improvements relating to Tobacco-Smoke Filters

1,163,349. Tobacco-smoke filters. BRITISH-AMERICAN TOBACCO CO. Ltd. 2 Aug., 1968 [9 Aug., 1967], No. 36520/67. Heading A2C. [Also in Division C7] The filtration properties of fibrous, filamentary or sheet tobacco-smoke filtering material with respect to hydrogen sulphide and hydrogen cyanide are imp...

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Bibliographic Details
Main Author THOMAS WILLIAM CHARLES TOLMAN
Format Patent
LanguageEnglish
Published 04.09.1969
Subjects
CIGARETTES
CIGARS
HUMAN NECESSITIES
MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
MOUTHPIECES FOR CIGARS OR CIGARETTES
SMOKERS' REQUISITES
TOBACCO
TOBACCO SMOKE FILTERS
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Summary:1,163,349. Tobacco-smoke filters. BRITISH-AMERICAN TOBACCO CO. Ltd. 2 Aug., 1968 [9 Aug., 1967], No. 36520/67. Heading A2C. [Also in Division C7] The filtration properties of fibrous, filamentary or sheet tobacco-smoke filtering material with respect to hydrogen sulphide and hydrogen cyanide are improved by treating the material with a finely divided zinc-containing powder produced by a high-energy comminution process carried out under water. Creped paper and a cellulose acetate tow are each sprayed with an aqueous suspension of a zinc powder produced by electric-spark erosion between two zinc electrodes submerged in water, dried and converted into filter rods.
Bibliography:Application Number: GB19670036520