Method and apparatus for forming an air dilution filter

Details Method and apparatus for forming an air dilution filter Method and apparatus for forming an air dilution filter

1980-03-14

1983-01-25

Millin, Vincent

Tobacco

Cigar or cigarette making

Tip or mouthpiece applying or forming

131 93, 131 94, 131 95, 82101, 82102, 82 84, 493 42, 493 48, A24C 500, A24C 556, A24C 560

Patent

active

043697968

ABSTRACT:
The air dilution filter of the cigarette is provided with an annular zone in the plug wrap paper which enables air to pass directly into the fibrous body of the filter material after passing through apertures in the tipping paper.
The annular zone can be comprised of a groove which is fabricated by a pair of rotating knives and a rotatable spacer with radial cutting edges which rout out material from each filter plug during conveyance of the plug on an alignment drum of a cigarette making machine. Alternatively, a plurality of closely spaced rotating knives which cut through the plug wrap paper only may be used to form a series of closely spaced annular grooves or slits in the filter periphery.

REFERENCES:
patent: 4022221 (1977-05-01), Berger
patent: 4090826 (1978-05-01), Hinzmann
patent: 4135523 (1979-01-01), Luke et al.
patent: 4149546 (1979-04-01), Luke et al.

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