| 摘要 |
A cylindrical roller body (10) has a surface texture incorporating a random pattern of interconnected channels or "cracks" (18) and lands (20) and may be mounted for rotation contiguous with a second roller (22) having a fluid supply (30), for transferring fluid therebetween, thereby forming a uniform fluid layer (32), available for deposit. A chromium plated surface layer (16) is subjected to a sequential plating, etching, and polishing process for producing an array of interconnected, shallow cracks and smooth, segregated lands thereupon. The cracked cylindrical surface of the roller then presents a plurality of smooth, unconnected lands to fluids dispersed thereon. Similarly, the interconnected crack pattern permits lateral flow of fluid between lands to reduce the surface tension and improve fluid transfer characteristics. The roller can be used to transfer any fluid with more control, volumetric capacity and less surface tension dependency than conventional rollers of either greater smoothness or greater roughness. <IMAGE> |
