Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
Method of manufacturing devulcanized rubber using high temperature and shearing pressure
 Devulcanized rubber in which sulfuric crosslinking bonds are cut and which contains carbon black particles having very small diameters. Vulcanized rubber of discarded products is devulcanized by heating it at a temperature of 180.degree. C. --350.degree. C. and applying a shearing pressure of 10-150 kg/cm.sup.2 thereto. Reclaimed rubber products are manufactured by vulcanizing and molding, into desired shapes, a material made of only devulcanized rubber in which sulfuric crosslinking bonds are cut and which contains carbon black particles having very small diameters or a material made of the devulcanized rubber mixed with virgin unvulcanized rubber. 
Toyota Jidosha Kabushiki Kaisha Kabushiki Kaisha Toyota Chuo Kenkyusho Toyoda Gosei Co., Ltd.
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Norio Katsumi Yasuyuki Masayoshi Kazuya Arimitsu Makoto Masao Atsushi Katsumasa Hidenobu
Sato Nakashima Suzuki Ichikawa Watanabe Usuki Mouri Owaki Murase Takeuchi Honda