(under subclass 22) Processes in which either (1) the hollow work moves during treatment, or (2) the hollow work has relatively movable parts at least of which moves during treatment (e.g., engines where the piston moves during treatment).
(1) Note. Motion of plural work pieces sequentially to the
work treating station where it is stationary during work treatment is included.
SEE OR SEARCH THIS CLASS, SUBCLASS:
20, for internal combustion engines operative as such with resultant heating, and with application of treating agents during or after engine operation.
32+, for similar subject matter for the other than hollow work having steps for treating an interior surface.
