| 摘要 |
A cigarette filter is provided which comprises a pair of complemental sections formed of smoke-impervious material and arranged in registered relation and affixed to one end of a tobacco rod. Each complemental section is provided with an elongated indentation closed at one end. Sandwiched between the indentations of the complemental sections and cooperating therewith to form a pair of elongated smoke passageways is a thin perforated membrane. A predetermined number of the membrane perforations effect communication between the passageways whereby smoke flowing from one passageway to the other attains a high velocity while passing through a membrane perforation and the high-velocity smoke impinges against a surface of the passageway and causes solid and liquid particles entrained in the emitted smoke to be deposited on said surface.
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