| 摘要 |
The present invention is directed to a novel metering roll for inks or the like and to the method of making the same. In accordance with the invention, a cylindrical metallic roller core is provided with a multiplicity of shaped indentations or receiver cells in its periphery, in concentration of from about 35 to 90 cells per lineal inch in each direction, the cells being preferably generally in the form of inverted pyramids of a selected volumetric capacity, the receiver cells being preferably closely spaced and separated by land areas of minimal size of the order of 30 microns or less. A ceramic coating is applied over the surface of the roller by a plasma flame technique which is known per se, in such manner that the periphery and the walls of the cells are covered to define an extremely wear resistant, long lived protective surface, the coating partially filling the receiver cells and providing a ceramic surface having outwardly open metering cells, the volumetric capacity of the metering cells being substantially less than that of the receiver cells, i.e. in the order of one fifth of the volume or less.
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