Patent ID: 9322368
Filing Date: 2016-04-26
CPC Classification: B01D,F02M

Claim Text:
1. A canister comprising: a case; a plurality of chambers which are arranged in series along an air flow direction in the case and filled with an adsorbent; and an inflow portion and an outflow portion of fuel vapor which are provided at one end in the air flow direction in the case and an air release opening of the fuel vapor which is provided at the other end in the air flow direction in the case, and the adsorbent filling at least the chamber located at an air release opening side, of the plurality of chambers, having a macroscopic pore whose diameter is equal to or greater than 50 nm and is less than 100000 nm, which is obtained by adding a meltable core that disappears during baking to powdery activated carbon having a microscopic pore whose diameter is less than 50 nm together with a binder and molding and baking this mixture, the adsorbent filling at least the chamber located at the air release opening side, having a hollow cylindrical shape whose inside thickness is 0.6 mm to 1.5 mm and whose outside diameter is 4 mm to 6 mm or a hollow spherical shape whose inside thickness is 0.6 mm to 1.5 mm and whose diameter is 4 mm to 6 mm, and a ratio of volume of the macroscopic pore whose diameter is equal to or greater than 50 nm and is less than 500 nm to a total volume of the macroscopic pore whose diameter is equal to or greater than 50 nm and is less than 100000 nm being within a range of 30% to 70%.