Patents Examined by Jan H. Silbaugn
  • Reactive injection molding process for manufacturing a two-colored molded polyurethane products
    Patent number: 6156257
    Abstract: A polyurethane material is injected into a mold cavity having a reduced pressure to form e.g. the surface portion of a polyurethane covering for a steering wheel. A polyurethane material for forming a substantial inner portion thereof and free of any coloring matter is, then, injected into the cavity. Then, a polyurethane material containing coloring matter is injected into the cavity to form the remaining inner portion of the covering.
    Type: Grant
    Filed: December 10, 1996
    Date of Patent: December 5, 2000
    Assignee: Toyoda Gosei Co., Ltd
    Inventors: Katsumi Tachi, Toshihiko Asaya