Filter for a cigarette and a filter-tipped cigarette
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Apr 13, 2004
Grant Date -
N/A
app pub date -
Jul 24, 2000
filing date -
Jul 29, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A filter for a cigarette and a filter-tipped cigarette having a high degree of freedom in control of filtering-efficiency of smoke are provided. The filter has a core 10 and a sheath 12 made preferably of tow of cellulose acetate fibers. A plurality of axial passages 16 is formed between the core and the sheath and extend continuously between both end faces of the filter.
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