Method and apparatus for making composite filter rods

Details Method and apparatus for making composite filter rods Method and apparatus for making composite filter rods

1982-09-23

1985-09-17

Coan, James F.

Manufacturing container or tube from paper; or other manufacturi

Cigarette filter making

By assembling dissimilar filter materials

493 47, A24C 550

Patent

active

045418268

ABSTRACT:
Composite filters for attachment to cigarettes and containing particulate filtering material are produced by directly accelerating the particulate material, e.g. by means of a rotary impeller (62), to form a continuous stream which converges with a stream of spaced filter portions (6), both streams having approximately the same speed. The stream of particulate material is slightly laterally offset relative to the stream of filter portions, so that particulate material introduced into the spaces between filter portions has a tangential component and follows a helical motion within the space. Excess particulate material is removed by suction assisted scrapers or brushes (80-90). Delivery of particulate material may be regulated by an adjustable screen (65) or by varying the speed of the impeller (62).

REFERENCES:
patent: 3482488 (1969-12-01), Sexstone
patent: 3610112 (1971-10-01), Labbe
patent: 3623404 (1971-11-01), Jackson
patent: 4285678 (1981-08-01), Molins

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