| 摘要 |
<p>The weighing and sacking-off machine loads free-flowing material into valved sacks, having a filler head with spout inserted in the tubular sack valve. Equipment (18) is included to prevent material falling into or onto the sack after the weighing operation is complete. Typically this can comprise a movable shutter (18) at the mouth (17) of the spout (13), alternately opened and shut by a mechanism (20,22,23,24) at the start and finish of each operating cycle, this comprising a pneumatic ram, whose piston rod also turns, sliding in and out of engagement with the shutter and turning it in alternate directions.</p> |
