Patents Assigned to Akiyama Printing Machinery Manufacturing Corp.
  • Patent number: 4991501
    Abstract: A dampening water feed roller, characterized by a process of manufacturing which comprises forming a flame sprayed layer of a ceramic material composed of Al.sub.2 O.sub.3, TiO.sub.2, or a mixture of Al.sub.2 O.sub.3 and TiO.sub.2 on the peripheral surface of a metallic roller, subjecting the flame sprayed ceramic layer to a pore-occluding treatment with a hydrophilic SiO.sub.2 type inorganic pore-occluding agent, and grinding the treated layer to surface roughness of not more than 1.6 S. The roller permits supply of the dampening water without using the additives such as isopropyl alcohol in the dampening water.
    Type: Grant
    Filed: August 8, 1989
    Date of Patent: February 12, 1991
    Assignees: Nippon Steel Corporation, Akiyama Printing Machinery Manufacturing Corp.
    Inventors: Kazuhiro Yokoyama, Masami Akiyama, Teiichi Ando, Yasutaka Kojima