| 摘要 |
PROBLEM TO BE SOLVED: To provide a canister integral with a fuel tank, having a high adsorption efficiency and reducing the discharge of evaporation gas into the exterior while suppressing an increase in manufacturing cost. SOLUTION: An adsorptive-substance filled chamber 9 filled with activated carbon 8 as an evaporation-gas adsorbing substance is provided along molded pinch-off parts 7a, 7a integrally formed with a blow-molded tank body 6 made of resin. An annular thin-neck part 11 is formed over the whole circumference of the tank 6 by being squeezed from above and below so as to be inwardly biased by a fixed length from the molded pinch-off parts 7a, 7a and from end edges of a pair of sides other than the side where pinch-off cutting is made. Thus, the adsorptive-substance filled chamber 9 is formed so as to extend over the whole circumference of the tank 6 and again squeezed along the end edges and the molded pinch-off parts 7a, 7a, thereby forming an annular canister part 12 extending substantially over the whole circumference of the tank 6 so as to cause the adsorptive-substance filled chamber 9 to communicate with the interior and exterior of the tank body 6.
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