US Patent 11653701 Aerosol source for a vapor provision system

An aerosol source for an electronic vapor provision system includes a heating element; an atomizing chamber; a reservoir for holding free-flowing source liquid; and a porous wick extending from the atomizing chamber to the reservoir and comprising a heater portion in cooperation with the heating element within the atomizing chamber and at least one liquid collecting portion within the reservoir, the liquid collecting portion having a maximum cross-sectional parameter that is greater than an equivalent cross-sectional parameter of the heater portion.