| 摘要 |
PURPOSE:To provide a preferable method for manufacture of a newly available rubber band which eliminates a problem of the rubber band. CONSTITUTION:A soft rubber tube 11 is protrusion molded via a longitudinal section ring formed tube extruding opening 2. The extrusion molded soft rubber tube 11 is passed through a hot bath 8 by dipping, and vulcanization molded. Then, the molded rubber tube 15 is crushed to be constructed flatly. Then, the flatly constructed rubber tube 15 is successively cut out to a required width by means of a cutter 10 equipped with a cross section irregular formed edge to form an endless rubber band 16 having projections 20... on either or both surfaces of inner and outer side surfaces 18, 19. |
