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US 2008/0185011 A1Published application
Sealed cigarette filter
AssigneePhilip Morris USA Inc.
InventorTimothy S. Sherwood
Life of this patent
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Abstract
Smoking articles, such as cigarettes and cigarette filters, methods of manufacturing smoking articles including sealed filters, and methods of treating tobacco smoke are provided. In one exemplary embodiment, a smoking article contains sealed filters, wherein additives are sealed within the sealed filters.
Claims18
A cigarette, comprising:
- a tobacco rod;
- a sealed filter adjacent to a downstream end of the tobacco rod,
- wherein the sealed filter comprises:
- a housing with a stepped inner profile;
- a cavity within the housing;
- a first film sealing an upstream end of the cavity on a first step of the stepped inner profile;
- and
- a second film sealing a downstream end of the cavity on a second step of the stepped inner profile, wherein the cavity is located between the first film and the second film sealing a downstream end of the cavity;
- and
- tipping paper attaching the tobacco rod to the sealed filter.
7 more elements
A sealed cigarette filter, comprising:
- a housing;
- a cavity within the housing;
- a first film on a first side of the cavity;
- a second film on a second side of the cavity;
- and
- at least one piercing device located next to the first film and/or the second film.
3 more elements
Dependencies are inferred from the claim text.