| 摘要 |
The invention concerns a method of producing, in a continuous manner, tobacco-smoke filters each comprising a tube of porous tobacco-smoke filter material blocked at one end by a plug of smoke-impermeable material. Lengths of the plug material are deposited automatically upon a strip of the filter material at predetermined intervals along the same and the strip is brought to the form of the tube around the plug lengths. In the case of filters each further comprising an outer smoke-impermeable tubular wrapper disposed around the said tube with a gap between them which is closed at the other end of the tube, the tubular wrapper is automatically applied to and formed over the assembly consisting of the tube and plug lengths. |
