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Pneumatic suction conveyor means for the gravimetric dosing of bulk material components

  • US 5,147,152 A
  • Filed: 10/17/1990
  • Issued: 09/15/1992
  • Est. Priority Date: 10/20/1989
  • Status: Expired due to Fees
First Claim
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1. Pneumatic suction conveyor means for a gravimetric dosing of different pourable materials to a plurality of demand stations, the pneumatic suction conveyor means comprising:

  • a plurality of storage containers respectively accommodating one of said materials;

    a plurality of first delivery lines respectively connecting the plurality of storage containers to a distributor;

    a separator provided at each demand station for separating the respective material supplied thereto from the respective storage containers, each of said separators including an upper chamber and a lower chamber;

    a closable discharge opening provided in the lower chamber of each of said separators;

    a plurality of further delivery lines for respectively connecting the distributor to the upper chamber of the respective separators;

    a suction line connected to a suction fan and to the upper chamber of each of said separators;

    stop valve means provided at each separator for controlling communication between the suction line and the respective separators;

    a weighing container disposed between the upper chamber and the lower chamber of the respective separators for receiving the material separated by the respective separators;

    a transducer means for supporting said weighing container in the respective separators;

    a bottom-side material outlet provided in the respective weighing containers for discharging the material separated by the respective separators into the lower chamber of the respective separators; and

    a closure means provided at the bottom-side material outlet of each weighing container, said closure means being responsive to a material demand indicator provided at the associated demand station so as to be brought into a closed position and being adapted to be brought into an open position when a setting device is activated by the transducer means with a set time delay.

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