Abstract: A production device of a rubber band body includes: an extruder; and a pair of rollers for rolling a rubber member from the extruder between rolling areas of rollers to form a rubber band body, wherein a rolling area of at least one of the pair of rollers is configured by a circumferential groove formed in the outer periphery surface of the roller and extending over the entire periphery.

Abstract: Provided is a method for modifying an organic fiber cord, in which method an organic fiber cord can be stably modified at a high-quality, and at the same time, a higher efficiency can be attained compared to conventional methods. The method for modifying an organic fiber cord comprises the steps of dipping an organic fiber cord for tire reinforcement in an adhesive, the organic fiber cord comprising twisted organic fibers; drying the thus dipped organic fiber cord; and heat-treating the thus dried organic fiber cord for modification. In the drying step, the dipped organic fiber cord is consecutively irradiated with a microwave and a far-infrared radiation.