CIGARETTE FILTER WITH VARIABLE VENTILATION Russian patent published in 2016 - IPC A24D3/04 

FIELD: tobacco industry.

SUBSTANCE: invention relates to a cigarette with a variable ventilation filter including a smoking material core and a mouthpiece attached to the smoking material core, the mouthpiece containing a filtering segment adjacent and adjoined to the tobacco core and an element to be rotated relative to the filtering segment around its longitudinal axis for modification of the level of air admitted to the filtering segment of the cigarette with filter; additionally, the cigarette includes a ventilation indicator containing a scale extending circumferentially along the periphery of the cigarette with filter and an indicator; the scale is symmetrical relative to the vertical axis of the cigarette with filter; the indicator and the scale are rotated relative to each other around the longitudinal axis of the cigarette with filter; either the indicator or the scale rotates together with the rotating element; the level of air admitted to the filtering segment is demonstrated by the longitudinal distance between the indicator and a longitudinally aligned point on the scale.

EFFECT: ensuring controlled ventilation.

13 cl, 5 dwg