Improvements relating to cigarette filters

1,008,092. Tobacco-smoke filters. BRITISH-AMERICAN TOBACCO CO. Ltd. Dec. 18, 1964 [Jan. 21, 1964], No. 2656/64. Heading A2C. A tobacco-smoke filter comprises a tablet or disc 1 of compressed granular or powdered filter material provided with one or more perforations 6 through which the smoke to be f...

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Bibliographic Details
Main Author GREEN SYDNEY JAMES
Format Patent
LanguageEnglish
Published 27.10.1965
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:1,008,092. Tobacco-smoke filters. BRITISH-AMERICAN TOBACCO CO. Ltd. Dec. 18, 1964 [Jan. 21, 1964], No. 2656/64. Heading A2C. A tobacco-smoke filter comprises a tablet or disc 1 of compressed granular or powdered filter material provided with one or more perforations 6 through which the smoke to be filtered can pass, the ratio of the volume of voids to the volume of solid material being between 1:4 and 1:1. The perforations preferably have a radius of betwen 0.05 and 1.5 mm. The granular or powdered filter material may be kieselguhr, fullers earth, bauxite, activated alumina, carbon, casein, calcium caseineate, dried milk, calcium sulphate, calcium carbonate, iron oxide, silicates and siliceous earth and clays such as sepiolite. A natural or synthetic binder, e.g. lactose or starch may be mixed with the material.
Bibliography:Application Number: GB19640002656