| 摘要 |
<p>Apparatus for conveying material between two terminals (33, 34) using a reversible blower system that conveys a carrier member (31) through a tube (32) by suction from one terminal to an intermediate location and by pneumatic pressure from the intermediate location to the other terminal, and vice versa. The carrier member (31) is gradually retarded and stopped at each terminal by a yieldable plate (102) inclined into the path of the carrier member with a yieldable latching element (108) urging the plate inwardly and also serving to latch the carrier member in its ultimate terminal position. The tube has separately manipulatable, open-ended, end portions in which the carrier member is retained for manipulation into position for receiving or discharging its contents. Covers (55) on the carrier member (31) are automatically removed and replaced at each terminal by radially movable latching elements (76) on the cover that are manipulated by an axially movable central unlatching element (84). The carrier member (31) has annular projections (104) for sealing engagement of the tube. Each projection has an outwardly facing groove in which a compressible sealing strip (122) is retained with a foamed elastomeric base strip (124) behind sealing strip to deflect the sealing strip outwardly into sealing disposition.</p> |
