Philip Morris Inc.

Randall K Greene

Douglas D McRae

Willard A Geiszler

Roger A Comes

Bobby W Francis

Leonard E Brown, Jr

Methods and apparatus for continuously and instantaneously measuring sidestream smoke are provided. A hood assembly is provided to fit over the ports of a conventional smoking machine. Sidestream smoke produced by test cigarettes is continuously drawn through the hood by an exhaust system. A laser beam is passed through the smoke one or more times before the beam is sensed by a photodiode detector. An electrical signal from the detector, representing the light transmission, is received by a strip recorder or computer system. The transmission measurements are used to calculate the extinction coefficient of the smoke for comparison purposes.

Methods and apparatus for measuring sidestream smoke

Humic acid-dyed paper suitable for use as wrappers for smoking articles is post treated with magnesium sulfate to fix or render the humic acid insoluble. Paper treated in this manner provides a product of acceptable brown color. Smoking articles wrapped in the treated paper evolve a reduced amount of carbon monoxide on smoking under normal conditions in comparison to currently available brown papers stained with humic acid.

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Richmond, VA, United States of America

Randall K Greene