1
James S Andrews, Daniel Cooper: Weighing and filling method and apparatus. Hierath & Andrews, John E Reilly, June 27, 1989: US04843579 (21 worldwide citation)

A method and apparatus for rapidly and accurately dispensing measured amounts of powdered material from a vibratory feeder with a shaker rod extending through an orifice at the discharge end of the feeder and which rod undergoes reciprocal movement in response to vibration of the feeder to regulate ...


2
James S Andrews: High speed precision weighing and filling method and apparatus. Hierath & Andrews, John E Reilly, February 14, 1984: US04431070 (14 worldwide citation)

Precision weighing and filling of comminuted materials is carried out at high speeds by advancing the material to be weighed into a rotatable pan, applying an unbalanced electromagnetic force to the pan so as to cause it to rotate through a predetermined angle to dump the contents into a tiltable di ...