Abstract: A workpiece cleansing apparatus has a walking beam conveyor for transporting a camshaft to be cleaned to a first work station consisting of row of cradles which support the camshaft in such a way that oil ports therein are not blocked. Pressurized air is fed through an oil channel in the camshaft and passes through the oil ports to the exterior to remove moisture therefrom. The camshaft is then transported to a second work station where it is supported by cradles which mate with cradles so encircling the oil ports. The pressurized air is fed to the cradles and passes through the oil ports to the oil channel and thence to atmosphere.

Abstract: An arrangement for surface treating workpieces has a pair of rotary conveyors each rotatable about a respective vertical rotation axis and provided with a plurality of angularly spaced holders each of which can grip a respective workpiece and advance it angularly stepwise through a plurality of respective working stations. In addition each of these holders can be rotated about an axis generally radial of the respective rotation axis for the rotary conveyor for treatment on all sides of each workpiece as it is stepped through the various surface treatment stations. A line conveyor extends tangentially passed the two conveyors and is of the walking-beam type. This line conveyor feeds workpieces to the upstream conveyor so that they then move around the working stations of this upstream rotary conveyor, then takes them off the upstream rotary conveyor and feeds them to the downstream rotary conveyor where they are stepped through the respective working stations of this conveyor.