Meaning of ink ball

ink' ball"

Pronunciation: [key]
— Print. Print.
  1. one of a pair of heavy pads of horsehair and cotton covered with sheepskin or buckskin and equipped with a handle, used before the invention of the ink roller for dabbing ink on type for printing.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.