Patents Examined by Herbert C. Lorin
  • Method for fibrillating carbonaceous fibers
    Patent number: 4789509
    Abstract: A method for fibrillating carbonaceous fibers, which comprises contacting a tow of carbonaceous fibers to rotating surfaces of rollers for fibrillation, wherein at least two rollers are disposed so that the center axes of the rollers intersect the direction of advance of the tow of carbonaceous fibers and the rotating surfaces of the rollers are substantially alternately inclined in opposite directions, thereby to exert a shearing force to the tow in a direction transverse to the direction of advance of the tow.
    Type: Grant
    Filed: December 10, 1987
    Date of Patent: December 6, 1988
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Takeshi Ikeda, Hideo Handa, Keisuke Nakano