Method for testing the ventilation level of cigarette products according to the filter perforation process has a testing drum on which the porosity is checked.

摘要

Cigarettes (7,100) are manufactured from tobacco (3), wrapper (4) and filter (8) elements in a machine (1) and deposited on a drum (22) where the porosity of the wrapping is checked and perforations made in the filter section by a laser (17) to reach a predetermined ventilation level.