Patent attributes
An apparatus and method of controlling resistance-to-draw of an electronic smoking article is disclosed, which includes a reusable portion and a cartomizer portion, and which includes: supplying an air flow from one or more inlets in an outer cylindrical housing of the electronic smoking article to a cartomizer via a cartomizer inlet having a fixed diameter configured to control a resistance-to-draw of the electronic smoking article and wherein the cartomizer inlet is located inside the outer cylindrical housing of the electronic smoking article, wherein a combined air flow area of the one or more inlets in the outer housing of the electronic smoking article are greater than a cross-sectional area of the cartomizer inlet; heating a liquid material from a reservoir to form an aerosol; and combining the at least initially volatilized liquid material with the air flow from the cartomizer inlet.
