Tob. Reporter, 1983, 110-2, p. 77, ISSN.0361-5693
Smoke filter provides tobacco flavor enrichment
U.S. Patent 4.355.995 assigned to American Filtrona Co. The filter comprises a reconstituted tobacco member formed from a coherent sheet of reconstituted tobacco which has been uniformly embossed with a series of parallel grooves, and then compacted...