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FILLING CONTAINERS WITH FRIABLE PARTICLES

  • US 3,786,844 A
  • Filed: 08/12/1971
  • Issued: 01/22/1974
  • Est. Priority Date: 08/12/1971
  • Status: Expired due to Term
First Claim
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1. A method of achieving substantially uniform average weight of successive containers filled with flowably solid friable particles from a hopper containing such particles through a closeable, variable open-area filling aperture, said method comprising:

  • successively positioning each unfilled container beneath said aperture when said aperture is closed, opening said aperture to fill said container with said friable particles, the flow of said friable particles into said container ceasing due to their natural angle of repose when said container becomes filled, closing said aperture after filling each said container, and forwarding each said filled container from beneath said aperture;

    monitoring the average filled weight and determining the average weight deviation of said filled containers being forwarded from beneath said aperture by means suitable therefore; and

    modulating the open-area of said aperture as a function of said deviation to increase the open-area if the average filled weight is above the nominal average and to decrease the openarea if the average filled weight is below nominal average, whereby sufficient said friable particles are fractured during said filling to sufficiently reduce the average size of said particles to achieve the desired uniform weight of filled containers.

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