Cigarettes and their construction
AssigneeTotally New Technology Pty Ltd
InventorKerry Grant DUGGAN
Life of this patent
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Abstract
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.
Claims10
A composite tipping paper wrap which may be fed from a roll and wound onto a column assembly including a wrapped tobacco column and a co-axially juxtaposed filter, the tobacco column having a butt portion extending axially from the filter, the composite tipping paper wrap consisting of a tape or a band of:
- tipping paper formed to wrap about the filter, and
- heat shrink material laminated to and protruding from one edge of the tipping paper and together forming the composite tipping paper wrap, and which on application to said respective column assembly extends beyond the junction between the filter and the juxtaposed wrapped tobacco column to form an encasing heat shrink layer about the butt portion of the wrapped tobacco column;
- wherein the encasing heat shrink material is capable of shrinking about the butt portion of the wrapped tobacco column sufficiently to extinguish the encased tobacco when the tobacco column burns down to the heat shrink material.
A composite tipping paper wrap which may be fed from a roll and wound onto a column assembly including a wrapped tobacco column and a co-axially juxtaposed filter, the tobacco column having a butt portion extending axially from the filter, the composite wrap consisting of a tape or a band of:
- tipping paper formed to wrap about the filter, and
- a band of heat shrink material joined to and protruding from one edge of the tipping paper and together forming a laminate composite tipping paper wrap, and which on application to said respective column assembly extends beyond the junction between the filter and the juxtaposed wrapped tobacco column to form an encasing heat shrink layer about the butt portion of the tobacco column;
- wherein the band of heat shrink material overlaps all or a significant portion of the band of tipping paper and is apertured along an overlapping area to enable the band of tipping paper to pass air, smoke or gases therethrough;
- wherein the encasing heat shrink material is capable of shrinking about the butt portion of the wrapped tobacco column sufficiently to restrict smoke flow through the wrapped tobacco column and draw air through the aperatures.
Dependencies are inferred from the claim text.