Smoking article filter and method of manufacturing the same
AssigneeJapan Tobacco Inc.
InventorsMichihiro Inagaki, Hiroshi Shibuichi
Life of this patent
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Abstract
A smoking article filter comprising: a filter material having a circular cylinder shape with first and second end surfaces and a side surface, and including a corrugated film with ridge portions and valley portions arranged alternately, the ridge portions and valley portions extending from the first end surface to the second end surface to form a plurality of air flow paths that allow air to flow from the first end surface to the second end surface; a plurality of particles arranged in the air flow paths; and a filter wrapping paper wrapping the filter material such that the side surface is covered with the filter wrapping paper.
Claims19
A smoking article filter comprising:
- a filter material having a circular cylinder shape with first and second end surfaces and a side surface, and including a corrugated film with ridge portions and valley portions arranged alternately, the ridge portions and valley portions extending from the first end surface to the second end surface to form a plurality of air flow paths that allow air to flow from the first end surface to the second end surface, wherein the corrugated film is a plastic film and is impermeable to air, and the filter material is formed by gathering the corrugated film into a plug form such that the ridge portions and valley portions form the plurality of air flow paths each extending in a longitudinal direction of the filter material;
- a plurality of particles arranged in the air flow paths;
- and
- a filter wrapping paper wrapping the filter material such that the side surface is covered with the filter wrapping paper.
A smoking article filter comprising:
- a filter material having a circular cylinder shape with first and second end surfaces and a side surface, and including a corrugated film with ridge portions and valley portions arranged alternately, the ridge portions and valley portions extending from the first end surface to the second end surface to form a plurality of air flow paths that allow air to flow from the first end surface to the second end surface, wherein the corrugated film has a tensile elongation of 100% or more;
- a plurality of particles arranged in the air flow paths;
- and
- a filter wrapping paper wrapping the filter material such that the side surface is covered with the filter wrapping paper.
A smoking article filter comprising:
- a filter material having a circular cylinder shape with first and second end surfaces and a side surface, and including a corrugated film with ridge portions and valley portions arranged alternately, the ridge portions and valley portions extending from the first end surface to the second end surface to form a plurality of air flow paths that allow air to flow from the first end surface to the second end surface, wherein the corrugated film is a plastic film and is impermeable to air;
- a plurality of particles arranged in the air flow paths;
- and
- a filter wrapping paper wrapping the filter material such that the side surface is covered with the filter wrapping paper.
Dependencies are inferred from the claim text.