发明名称 |
FILTER CONSTRUCTION AND METHOD OF FORMING SAME |
摘要 |
A filter is provided for attachment to the downstream end of a tobacco rod. The filter includes a unitary core piece formed from a single blank of sheet material and a sleeve unit encompassing said core piece and cooperating therewith to form a shallow passageway through which smoke is caused to flow subsequent to having impinged at a high velocity against a surface forming the passageway.
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申请公布号 |
US3640287(A) |
申请公布日期 |
1972.02.08 |
申请号 |
USD3640287 |
申请日期 |
1969.09.22 |
申请人 |
R.J. REYNOLDS TOBACCO CO. |
发明人 |
JESSE R. PINKHAM |
分类号 |
A24D3/04;(IPC1-7):A24F13/06 |
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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