Patent ID: 7114635

Claim:
An antipollution cap comprising: a base member ( 7 ) attachable to a main container body ( 10 ) for containing a fluid; an overcap ( 8 ) mountable on the base member ( 7 ); a pressing member ( 9 ) inserted into and held by the base member ( 7 ) to be slidable relative thereto, with a groove portion ( 91 ) formed in a side face thereof for guiding the fluid to the outside, the pressing member being pressable toward the main container body ( 10 ) by the overcap ( 8 ) to cancel a sealed condition of the main container body ( 10 ); a first tight contact member ( 11 ) provided on a tip end portion ( 77 ) of the base member ( 7 ) to be placed in tight contact with the pressing member ( 9 ) from outside and yet allow the fluid to be discharged therethrough; and a second tight contact member ( 12 ) provided on an inner periphery of the base member ( 7 ) to be placed in tight contact with the pressing member ( 9 ) in a pressed position thereby preventing the fluid from being discharged therethrough and yet allowing ambient air to flow therein.