| 摘要 |
A dust sealing mechanism for use in association with a receptacle for dust containing material and comprising a pair of relatively movable telescoped sleeves, one of said sleeves being adapted to be moved into sealing engagement with an outlet from which the material is fed to the receptacle, and the other of said sleeves being adapted to cooperate with an inlet in the receptacle, and means interconnecting the two sleeves for effecting opposite axial movement of the sleeves into their operative position whereby material can be fed through the sleeves into the receptacle comprising a rotatable ring having camming engagement with the respective sleeves. |
