发明名称 |
Filter for smoking article |
摘要 |
The filter is formed by a cylindrical element (3) having a helical groove (7) formed in its outer surface and also a wrapping (4) stuck to the outer surface of this same cylinder. The wrapping is of a porous material to allow components of the smoke in the vapour phase to diffuse through the wrapping as the smoke travels along the groove. <IMAGE>
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申请公布号 |
CH616569(A5) |
申请公布日期 |
1980.04.15 |
申请号 |
CH19770003350 |
申请日期 |
1977.03.17 |
申请人 |
BRITISH-AMERICAN TOBACCO CO. LTD. |
发明人 |
JOHN ANTHONY LUKE;FRED HASLAM |
分类号 |
A24D3/04;(IPC1-7):A24C5/50 |
主分类号 |
A24D3/04 |
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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