Patent ID: 7278406

Claim:
A hydrocarbon adsorber for installation into an element of an air intake system of an internal combustion engine to adsorb hydrocarbon vapors migrating out of the air intake system during engine shutdown periods, the adsorber being formed by spiral winding of a sheet element into a plurality of convolutions, said sheet element comprising: a) a pollutant-treating sheet material including activated carbon; and b) a support element formed of an inert material, wherein said support element includes a plurality of features extending from a first surface thereof, and wherein said sheet material is bonded to a second surface of said support element opposite said first surface to form said sheet element, and wherein said spiral winding of said sheet element causes one or more of said features of each convolution to be brought into contact with said sheet material of the adjacent convolution, defining a spiral space for passage of gas through said hydrocarbon adsorber.