(under subclass 173.1) Process wherein a work part being deformed is a hollow elongated body whose longitudinal dimension is much greater than its lateral cross-sectional dimension, i.e., a tube, or therein a work part being deformed is an elongated element specially configured to be used as a structural load bearing member, i.e., a frame member.
SEE OR SEARCH CLASS
29, Metal Working,
897+, for method of making structural members proper in that class (29). See Lines With Other Classes and Within This Class, The Classes Including Post-Fusion Treatment, in this class (228) for the classification line between Class 29 and Class 228.
