A - Human Necessities – 24 – D
Patent
A - Human Necessities
24
D
131/17, 131/59
A24D 3/00 (2006.01) A24C 5/52 (2006.01) A24D 3/04 (2006.01)
Patent
CA 1182712
ABSTRACT OF THE DISCLOSURE An improved tobacco smoke filter is characterized by grooves defined in its outer periphery and extending to the smoke discharging end of the filter. The grooves are total- ly exposed to ambient air along their entire length and serve as open air dilution passages to conduct air into the smoker's mouth with each puff or draw. In one embodiment, the filter rod contains no plug wrap and is joined to a tobacco rod with tipping paper, the grooves being defined in both the tipping paper and the filter rod. These grooves may be defined in the final assembled product by forming the grooves in the tipping paper and the filter rod at the same time. Alternatively, the filter rod is pre-grooved and the tipping paper is attached thereto so as to conform to the grooves. In another embodiment, the filter rod is wrapped with a suitable plug wrap which is either grooved simultane- ously with the rod or applied to conform to the pre-grooved rod; a short tipping paper ring is then applied to the joint between the filter rod and the tobacco rod.
400647
American Filtrona Corporation
Marks & Clerk
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