Ventilated cigarette filter

Details Ventilated cigarette filter Ventilated cigarette filter

1986-10-17

1989-02-28

Millin, V.

Tobacco

Smoke separator or treater

By adding constituent to smoke stream

131340, 131344, A24D 302, A24D 304

Patent

active

048076473

ABSTRACT:
A cigarette filter comprising longitudinally aligned core components a first of which is air-permeable and of relatively high pressure drop longitudinally of the filter but substantially air-impermeable radially of the filter and a second of which is air-permeable and of relatively low pressure drop longitudinally of the filter, and a common wrap or partial wrap which extends along and around or partially around said core components and provides for ventilation of the filter at a region longitudinally spaced from the first core component.

REFERENCES:
patent: 4570649 (1986-02-01), Nichols et al.

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