Patents Assigned to Maruenu Kabushikikaisha
  • Patent number: 6395814
    Abstract: This invention is to provide a wiper blade for removal of oil film which utilizes piezoelectricity of tourmaline, and an elastic material 1 for primary material of the wiper blade B is masticated, and the tourmaline T whose particle diameter is 0.1 micron to 30 microns, preferably 0.1 micron to 3 microns is blended with the masticated elastic material 1 for primary material of the wiper blade B by means of the roller, and thereafter the tourmaline T is blended together with the cross linking agent 2 and another blending agent 3 in the elastic material 1 for primary material which is kneaded, and finally, the end product is molded (heating and pressurization), and in 100 parts of the elastic raw material, 0.2 to 100 parts of the electric stone (tourmaline) T is contained and the resulting wiper blade of this invention has an effect of removing the oil film.
    Type: Grant
    Filed: March 22, 2000
    Date of Patent: May 28, 2002
    Assignee: Maruenu Kabushikikaisha
    Inventors: Tetujiro Kubo, Takao Watanabe