FIELD: smoking accessories.
SUBSTANCE: invention relates to a method for manufacturing filters for smoking articles, the method comprising steps of: providing hollow tubes of filter material, each hollow tube having an outer diameter and an inner diameter; providing filter inserts, each filter insert having a first portion having a cross sectional dimension larger than the inner diameter of the hollow tubes; inserting each filter insert into a hollow tube of filter material such that, during inserting, the first portion of the filter insert engages with the hollow tube to retain the filter insert in the hollow tube, wherein the filter insert is substantially spherical, the cross sectional dimension of the first portion of the filter insert being a diameter of the spherical filter insert.
EFFECT: technical result is preventing fall of the insert.
14 cl, 6 dwg
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