a. A feeder in which the material is carried on a plate subjected to a
reciprocating motion and so constructed that when the plate moves in the
reverse direction the material remains stationary. The rate of feed is
normally varied by adjusting the stroke of the reciprocating plate.
See also: plate feeder
b. A device used to empty a bin or hopper from the bottom by horizontal
reciprocating action of its parts, usually after primary crushing.
Dictionary of Mining, Mineral, and Related Terms