发明授权
- 专利标题： Cigarette with a dual-structure filter
- 专利标题（中）： 香烟与双重结构过滤器
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申请号： US09095132申请日： 1998-06-10
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公开(公告)号： US06206007B1公开(公告)日： 2001-03-27
- 发明人: Takaichi Yoshida , Hayato Hasebe , Kazuyo Kaneki , Shinichiro Tanaka
- 申请人： Takaichi Yoshida , Hayato Hasebe , Kazuyo Kaneki , Shinichiro Tanaka
- 优先权： JP9-158684 19970616; JP9-158747 19970616
- 主分类号： A24D304
- IPC分类号： A24D304
摘要：
A cigarette with a dual-structure filter includes a dual-structure filter having a first filter element and a second filter element arranged downstream of the first filter element, a tobacco rod arranged upstream of the filter, and a tip paper covering a downstream end portion of the tobacco rod and a circumferential surface of the filter. At least one row of a plurality of holes are formed in the tip paper in a circumferential direction of the filter. An air-permeation resistance per unit length of the second filter element is at least twice that of the first filter element. An air inflow rate from the tip paper is at least 20%.