| 摘要 |
A device (1) is connected to an automatic machine below a hopper (2) for feeding a paste substance, whose quantity is metered by the device (1) and is to be introduced into the containers by a filling nozzle. The device (1) includes a central body (10) with a bore of a cylinder (11), closed at the top by a cap (110), and a parallel inlet channel (12), which leads to the bore (11) through a inlet aperture (13). An inlet conduit block (30) is fastened to the upper part of the central body (10) and connects the inlet channel (12) with the hopper (2). An exhaust conduit (40) is fastened to the side of the central body (10) and connects an outlet aperture (14), made in the bore (11), with the conveying means (60), associated to the filling nozzle. A piston (20) having a longitudinal groove (21) is inserted in the bore (11). Power means make the piston (20) slide along the bore (11) and rotate on its axis, so as to bring the groove to face respectively the inlet opening (13), during the suction step, and the outlet aperture (14), during the delivery step. The elements are assembled to each other and connected to the parts of the machine by quick coupling means, which are operated without tools.
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