Tobacco-smoke filters专利检索-空烟管烟草制品及加工专利检索查询-专利查询网

Tobacco-smoke filters

阅读：171发布：2022-03-25

专利汇可以提供Tobacco-smoke filters专利检索，专利查询，专利分析的服务。并且A tobacco-smoke filter comprises a tube of smoke-filtering sheet material, for example paper, extending longitudinally within and spaced radially from an outer tubular wrapper, for example an extruded smoke-impervious plastics material, the tube being blocked at both ends, while the space between the tube and the wrapper is blocked around complementary arcs at opposite ends and longitudinally in such manner that smoke entering at one end must pass through the wall of the tube twice before reaching the other end. Suitably the wrapper is formed or provided at intervals around its circumference with a number of longitudinal ribs for supporting the tube.，下面是Tobacco-smoke filters专利的具体信息内容。

权利要求

1. A tobacco-smoke filter comprising a smoke-porous tube of smoke-filtering sheet materiAl having a wall and extending substantially longitudinally within and spaced radially from an outer tubular wrapper, a block at each end of the tube and a smoke passage chamber therebetween, and an inturned lip extending from said wrapper at opposite ends thereof through subtending complementary arcs totalling 360*, whereby the space between the tube and the wrapper is blocked around subtending complementary arcs at opposite ends and longitudinally from arc to arc so that smoke entering the said space at one end is constrained to pass through the wall of the tube twice before reaching the other end.

2. A filter according to claim 1, wherein the wrapper has, at intervals around its circumference, a number of longitudinal internal ribs for supporting the tube along its length.

3. A filter according to claim 1, wherein the wrapper is made of an extruded smoke-impervious plastics material.

4. A filter according to claim 1, wherein said inturned lip comprises circumferential seals around semi-circular arcs offset by 180* one from the other.

5. A filter according to claim 1, wherein said inturned lip comprises circumferential seals around semi-circular arcs offset by 180* one from the other, the said seals extending circumferentially between the same longitudinal ribs, but around the said offset arcs, at the opposite ends of the filter.

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