| 摘要 |
A roll-on applicator for use in applying a flowable media to a surface includes a housing which is constructed and arranged so as to define a first chamber and a second chamber which is in communication with the first chamber, a generally-spherical ball received within the first chamber, a spring-biasing valve received within the second chamber and a sealing insert positioned between the ball and the valve. The sealing insert is moveable between a first position wherein a flow passageway between the first and second chambers is open and a second position wherein the flow passageway between the first and second chambers is closed. |
