IMPROVED SMOKING PRODUCT FILTER (VERSIONS) Russian patent published in 2011 - IPC A24D3/04 

FIELD: tobacco industry.

SUBSTANCE: invention is related to an improved smoking product filter, in particular, to a cigarette filter. The filter includes the first section containing a smoke-impermeable material with a smoke flow duct longitudinally arranged therethrough, the second section positioned at an interval relative to the first section, the gap providing for smoke passage from the first section to the second one without dispersion of a greater part of its particles prior to reaching second section material. The second section is axially aligned with the first one. The second section contains a core segment enclosed by the circumferential space segment and ventilation holes arranged in the second section or in the interval. One of the sections of the core and the circumferential space contains a filtering material with a high differential pressure. The other of the above sections contains a material with a lower differential pressure. The smoke flow duct is longitudinally aligned with the circumferential space segment or the core segment containing the material with a high differential pressure. In accordance with another version the filter includes the first section containing a smoke-impermeable material with a smoke flow duct longitudinally arranged therethrough, the second section positioned at an interval relative to the first section, the gap providing for smoke passage from the first section to the second one without dispersion of a greater part of its particles prior to reaching second section material. The second section is axially aligned with the first one. The second section has a mouthpiece end on the interval side. The filter has ventilation holes arranged in the second section or in the interval and a smoke-impermeable closure insert connected to the second section end on the interval side. The smoke flow duct is matched to the closure insert.

EFFECT: filter efficiently reduces the output of smoke components delivered to the consumer during usage and enables reduction of the width of the smoking product conducting band and/or decrease of smoke components delivery fluctuation between inhalations.

29 cl, 7 dwg, 2 tbl