Smoking articles
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United States of America Patent
Stats
-
Jan 12, 1988
Grant Date -
N/A
app pub date -
Dec 22, 1986
filing date -
Dec 23, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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