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1986-12-22

1988-01-12

Millin, V.

Tobacco

Cigar or cigarette making

Including perforating

131 94, 131336, 493 42, 493 43, A24C 560, A24D 304

Patent

active

047184353

ABSTRACT:
There is disclosed a method of operating on a cigarette, which comprises a tobacco rod and a filter element interattached by a thermoplastic tipping wrapper, to allow for the ingress of ventilation air. The filter element also comprises ventilation duct(s) extending therewithin. A heated former is brought into contact with the tipping wrapper in such a way as to form indentations which intersect with a ventilation duct(s) of the filter element and to seal upstream end portions thereof.

REFERENCES:
patent: 4515170 (1985-05-01), Cantrell et al.

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