Recess filter and smokeable article containing a recess filter
AssigneePhilip Morris USA Inc.
InventorsEtienne Lecoultre, Thomas Badertscher
Life of this patent
Estimating the term…
Abstract
The invention relates to a recess filter with a cavity associated with the mouth and provided with a cavity wall, in addition to one or more filter elements associated with the tobacco. The cavity wall surrounds either the cavity or the cavity and, at the most, one part of the filter element(s), whereby ambient air can enter the filter element(s) from the side in order to provide sufficient ventilation. The invention also relates to a stack of several recess filters in addition to a smokeable article, especially a cigarette or cigarillo comprising one such recess filter.
Claims29
A smokeable article comprising a tobacco rod, which is encompassed by a cigarette paper, and a ventilated recess filter, the recess filter having a tobacco end and a mouth end, and wherein the tobacco rod and recess filter are connected to each other by an at least partially air-permeable covering paper, wherein:
- the recess filter has one or more filter elements at the tobacco end of the recess filter and a tubular cavity at the mouth end of the recess filter,
- the cavity is encompassed by an air-impermeable cavity wall having no perforations,
- the recess filter has a ventilation of at least 10%,
- the air-impermeable cavity wall encompasses only the cavity or encompasses the cavity and at least one of the one or more filter elements,
- the cavity wall and the one or more filter elements are encompassed by an at least partially air-permeable tipping wrap,
- the tipping wrap attaches the one or more filter elements to the cavity wall,
- the length of the cavity is 10 mm or less,
- a ratio of a length of the cavity to a total length of the recess filter including the length of the cavity is 0.3 or less, and
- wherein the cavity wall encompasses the cavity and the one or more filter elements in such a way that at least at the tobacco end of the recess filter, one filter element is at least partially not encompassed by the cavity wall.
A recess filter for a smokeable article comprising
- one or more filter elements at a first end of the recess filter,
- a tubular cavity at a second end of the recess filter, and having an air-impermeable cavity wall that encompasses the cavity, wherein:
- the recess filter has a ventilation of at least 10%,
- the air-impermeable cavity wall encompasses only the cavity or encompasses the cavity and at least one or more of the filter elements,
- the cavity wall has no perforations, and the cavity wall and one or more filter elements are encompassed by an at least partially air-permeable tipping wrap,
- the tipping wrap attaches the one or more filter elements to the cavity wall,
- a length of the cavity is 10 mm or less,
- a ratio of the length of the cavity to a total length of the recess filter including the length of the cavity is 0.3 or less, and
- wherein the cavity wall encompasses the cavity and the one or more filter elements in such a way that at least at the tobacco end of the recess filter, one filter element is at least partially not encompassed by the cavity wall.
Dependencies are inferred from the claim text.