CIGARETTES AND THEIR CONSTRUCTION

摘要

A cigarette is provided with the tobacco column portion adjacent the filter assembly encased by a heat shrink material whereby as the burn approaches the butt the heat shrink material begins to contract radially and compress the encased tobacco column restricting the air flow therethrough. This reduces the diameter of burning column adjacent the filter assembly and thus extinguishes or at least confines the remaining tobacco in the cigarette.

主权项

1. A tipping paper wrap which may be fed from a roll and wound onto a column assembly including a tobacco column and a co-axially juxtaposed filter, the tobacco column having a butt portion extending axially from the filter, the wrap including:
a band of tipping paper formed to wrap about the filter, and a band of heat shrink material protruding from one edge of the tipping paper and which on application to said respective column assembly extends beyond the junction between the filter and the juxtaposed tobacco column to form an encasing heat shrink layer about the butt portion of the tobacco column.