Grinder for glass plates or the like

A machine for grinding the edges of rectangular articles of glass or the like comprising first and second track means operable to respectively embrace first and second pairs of opposed edges of a row of abutting articles to support each article in said row against motion in all directions excepting along said track means and guide each piece within said row for movement along said track means, the exit end of said first track means intersecting the entrance end of said second track means at right angles, first and second pushers at the respective entrance ends of said track means operable with repeated cycles to engage one article and push it along said track means and thereby move the associated row along the associated track means toward the exit end thereof, said first pusher operating during each cycle to deliver a single article to the entrance end of said second track means, said second pusher operating out of phase with said first pusher to move said single article into said second track means and clear its entrance for a subsequent article, grinding means intermediate the ends of each of said track means operable to grind the opposed guided edges of articles as they move along the associated track means.