| 摘要 |
PCT No. PCT/IB94/00025 Sec. 371 Date Oct. 13, 1995 Sec. 102(e) Date Oct. 13, 1995 PCT Filed Feb. 25, 1994 PCT Pub. No. WO94/20284 PCT Pub. Date Sep. 15, 1994The invention relates to a sealing jaw for sealing thermoplastic materials or paper or cardboard coated with thermoplastic material, preferably packaging material. The sealing jaw is constructed from two ceramic materials, of which one is electrically insulating and the other electrically conductive: The electrically conductive ceramic material forms a continuous strand embedded in the insulating material and is, at or in the proximity of its end points, metallized so as to make good connection with an electric current source. The electrically conductive ceramic materials are treated with high pressure and heat so that they together form a pore-free, hard and abrasion-resistant body which can be applied to a steel rail. |
