Patent ID: 7175698

Claim:
A canister in which an activated charcoal layer is placed in a fluid passage by which an air intake port is connected to a charge port or purge port, and a chamber that divides the activated charcoal layer into sections so as to traverse the fuel passage is defined by a grid and a filter pad placed on a surface of the grid, wherein: the grid has a plurality of apertures uniformly formed on a surface of the grid, which comes into contact with the filter pad, the apertures communicating with said chamber, the grid comprising a single flat plate having first and second opposite surfaces, the first surface having first openings formed thereon and the second surface having second openings formed thereon so as to correspond to the first openings, respectively, the first openings deviating from the corresponding second openings in a direction along respective planes of the first and second surfaces, the first openings communicating with the corresponding second openings through paths, respectively.