National Geographic : 1919 Sep
The picture shows an 18 in. Spar Oak Belt driving a beater in a paper mill-hard duty in a warm, moist atmosphere. SparOak is the answer to a great many perplexing belt prob lems, saving power and standing up under the most severe conditions. If you have a troublesome belt drive, consult us as to what belt is required. Maybe it is SparOak; but in any event one of the Graton & Knight Standardized Series of Belts will fit exactly. Write for our book let on Standardized Belting. A Rugged Pulley-Gripper There is nothing like leather for belting, and SparOak Leather Belting has peculiar advantages all its own. SparOak is a two-in-one belt, combining rugged strength with unique pulley grip. SparOak Belting Two kinds of leather enter into a SparOak Belt. The outer ply is oak tanned, selected center stock. The ply next the pulley is G & K Spartan leather, tanned to give pliability and traction power unequalled by any other material. SparOak Belts grip from the start. During the weeks most new belts take to "work in," a SparOak Belt is giving full power and keeping production up to normal. They withstand repeated shifting, and the wear against step cone or flange pulleys. They render efficient service on drives with high speeds, small pulleys, and heavy loads. THE GRATON & KNIGHT MFG. COMPANY Worcester, Mass., U. S . A. Graton &Knight Standardized Series Leather Belting Tanned by us for belting use "Mention The Geographic-It identifies you"