(under subclass 395) Method or apparatus including stressing a sheet or web workpiece beyond its elastic limit and causing bending to occur but not along any predetermined line.
SEE OR SEARCH THIS CLASS, SUBCLASS:
185, for crushing or crumpling of sheet or web material in the formation of a rigid container.
395+, for corrugating without forming sharp fold lines.
407, for folding combined with crushing or crinkling.
