| 摘要 |
<p>Tobacco smoke filters and methods and means for making same wherein the products have an elongated annular intermediate member overwrapped with a conventional plug wrap, with discrete inner plugs of a length shorter than the intermediate member and offering at least as much resistance to passage of smoke as the intermediate member, being secured within the intermediate member against axial displacement. The inner member may be formed of a filtration material, as is the intermediate member, or the inner member may be formed of a material which is non-permeable to smoke. Portions of the intermediate member may be crimped to embed them into the inner member thereby isproving the engagement between these members. The inner member may be centrally positioned within the intermediate member to form cavities at each end of the filter or, alternatively, the inner member may be secured at one end of the intermediate member to provide only a single inner cavity. The smooth outer surface of the intermediate member enables the attachment of a conventional plug wrap without the need for an internal glue line. Means are disclosed for cutting an inner rod to form a multiplicity of inner plug members, and then axially spacing the inner members from each other by injecting jets of air or the like between adjacent inner members.</p> |
