Smoke filtration device for making self- and machine-rolled conically shaped cigarettes and manufacturing method

Abstract

A smoke filtration device for making self- and machine-rolled conically shaped cigarettes (10) comprises a frusto-conical tubular body (2) with a proximal end (4), a distal end (6) and an internal smoke filtering passage (8) connecting said ends. To improve the device, said smoke filtering passage is integrally formed with said tubular body, said tubular body is made of a sintered ceramic material, and said smoke filtering passage is configured as an open-cell porous structure having an effective porosity of 75 to 85%. In a method of manufacturing the smoke filtration device, the frusto-conical tubular body including said open-cell porous structure is formed by additive manufacturing.

Dependencies are inferred from the claim text.