Abstract: Disclosed is an apparatus for high temperature treatment of rectilinear-generatrix surfaces of nonconductive products. The apparatus comprises an anode arranged opposite to a cathode to provide an arc gap therebetween for striking an arc discharge. The apparatus is further provided with a product feeding device to move the product a desired distance from the axis of the arc. The cathode is held securely in place, while the anode is positioned, integrally with the fixed cathode, to maintain a fixed position of the arc axis within the arc gap exceeding the length of the generatrix of the surface being treated. The feeding device is designed so as to provide the movement of the products in a plane extending normally to the axis of the arc when the generatrix of the surface being treated is parallel to the axis of the arc.

Abstract: Disclosed is a device for surface fusion treatment of artificial stone products. The device comprises anode and cathode assemblies of a plasma generator forming an arc discharge along the plane of the surface to be treated, the anode and cathode assemblies being mounted separately. In the device, the anode and the cathode are made as round rods disposed to each other and rotating about their axes in opposite directions as viewed from the working zone. Arranged between the anode and the cathode is a screen having a gas-permeable bottom to feed a plasma gas therethrough to the working zone, thereby forcing the arc discharge against the surface being treated. The screen is mounted at right angles to the axes of the anode and the cathode and is movable along the axes by a reciprocating-motion drive, the arc discharge moving together with the screen.