Filter manufacturing method for the production of pre-filters to

Details Filter manufacturing method for the production of pre-filters to Filter manufacturing method for the production of pre-filters to

1985-08-02

1987-01-13

Larson, Lowell A.

Manufacturing container or tube from paper; or other manufacturi

Cigarette filter making

131342, 493 42, 493 43, 493 44, F16H 912

Patent

active

046361820

ABSTRACT:
A process of manufacturing a pre-filter for the filteration of harmful substances in cigarettes by using pine needles which have been steamed to eliminate the odor of the pine resin. The steamed pine needles then are dried in a shaded lot and formed into powder. A dough is made by mixing up fine powder crushed from the dried pine needles with water. The dough is then crushed into granular form and the pre-filter is obtained by forming the granules into a rod shape.

REFERENCES:
patent: 4124033 (1978-11-01), Zizka et al.

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