| 摘要 |
The invention relates to a cigarette filter (1) providing a first inner paper (2), a second intermediate paper (3) and a third outer paper (4), said first (2) and second (3) papers having such a width that, when wound, their edge do not overlap, and the third paper (4) having such a width that, when wound, its edges overlap; a filtering element (5) being provided on the first inner paper (2), in correspondence of one of the two filter ends. Thus a tube is realised, having a large empty portion, and a suitable consistency to withstand to the compression, with a built in filtering element comprised of a simple, mixed, cavity, etc. filter. |
