Tobacco smoke filter having improved tar/carbon monoxide ratio
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United States of America Patent
Stats
-
Nov 9, 1982
Grant Date -
N/A
app pub date -
May 27, 1980
filing date -
May 27, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tobacco smoke filter having an improved tar/carbon monoxide ratio is disclosed. The filter is obtained by sealing off the center portion of the filter with an inner member which is impermeable to the passage of smoke, thus directing all of the smoke to the periphery of the filter. In one embodiment, the inner member is formed as a thin walled tube of a material such as polypropylene, with the tube being crimped to seal one end of the tube. The crimped tube is then overwrapped with a smoke permeable material.
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