FIELD: thin-layer chromatography. SUBSTANCE: disks has the shape of truncated cones to allow side surface of the cones to interact with roll material. Larger bases of cones face each other. Length of supporting rollers is more than distance between disks. According to additional claims, at least one of the disks is positioned for movement along axis. Outlet pipe of supply reservoir is connected to the mechanism allowing it to be rocked in the plane parallel to axis of the disks. EFFECT: enhanced efficiency of coating. 3 cl, 3 dwg
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