Common flat rubber belt, also called transmission belt, usually takes high quality cotton canvas as its skeleton layers. After the surface of the canvas is scrubbed and coated with appropriate rubber, several layers of rubber canvas adhere together to form the flat rubber belt. On the longitudinal seam of the belt, enclosing rubber is used to make the seam firmer, and better adhered together better. The flat rubber belt has the characteristics of high strength, good flexibility, and small elongation. It is mainly used in factories, mines, docks, metallurgical industry, and also widely used in ordinary mechanical power transmission, great power processing of grains like rice and wheat, irrigation equipment, wood cutting and other power transmitting equipment for industry and agriculture. Therefore it plays more and more important role in various types of power transmitting equipment.