| 发明名称 |
TOBACCO SMOKE FILTER AND METHOD |
| 摘要 |
<p>This invention relates to a cigarette filter composed of two concentric cylindrical layers of fibrous filter materials, in which the inner cylindrical layer has a lower draw resistance than the outer cylindrical layer, and a method and apparatus for the manufacture thereof.</p> |
| 申请公布号 |
CA1059401(A) |
申请公布日期 |
1979.07.31 |
| 申请号 |
CA19760249857 |
申请日期 |
1976.04.08 |
| 申请人 |
LIGGETT & MYERS INCORPORATED |
发明人 |
VAN HALL, FLOYD |
| 分类号 |
A24D3/02;A24D3/10;(IPC1-7):24D1/04;24B15/027 |
主分类号 |
A24D3/02 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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