Abstract: A vacuum arc deposition apparatus includes arc power sources having cathodes connected to both ends of an evaporation source; exciting coils disposed at positions axially outwardly far from both the ends of the evaporation source so as to be coaxial with the evaporation source; and coil power sources independently connected to the exciting coils. In this apparatus, each of the coil power sources is capable of controlling the exciting current in such a manner that the film thickness and the consumption of the evaporation source are suitably distributed. Moreover, an arc containment device of the vacuum arc deposition apparatus includes an arc containment body having a diameter substantially the same as that of a cylindrical evaporation source, which is disposed at one end portion of the evaporation source.

Abstract: The present invention relates to an arc ion plating device utilizing a vacuum arc discharge to be utilized for the surface process of works and to an arc ion plating system provided with the above-mentioned device, and the present invention offers the device and the system which are able to realize extremely high productivity by an efficient handling of works. The device according to the present invention comprises a rod-shaped evaporation source and works to be coated with a film being disposed so as to surround the rod-shaped evaporation source, The device is so constituted that the works can be moved relative to the rod-shaped evaporation source in the axial direction of the rod-shaped evaporation source.

Abstract: A roller mill in which raw material fed between the upper surface of a pulverizing table and a pulverizing roller is pulverized by compression therebetween, wherein at least one annular recess coaxial with a roller shaft being formed on the pulverizing roller, thereby attaining reduction of self-excited vibrations of the roller mill and improvement of the pulverization efficiency. Further, in order to enhance these effects, the depth of the recess is set larger than the average grain size of the raw material. Moreover, the gap between the pulverizing table and the pulverizing roller has a wedge-like sectional shape which becomes narrower toward the outside of the pulverizing table, whereby the raw material which has been pulverized by compression between the table and the roller is prevented from escaping in the axial direction of the roller shaft, thereby attaining reduction of the self-excited vibration and improvement of the pulverization efficiency.