(under subclass 136) Process in which the use of structural means includes the interfolding of two or more sheet material edges followed by a pressing or flattening of the folds so as to mechanically prevent dislodgement of the edges.
(1) Note. The "interfolding" of the edges of the material is intended to be such as to prevent all movement of the edges except axial of the fold(s).
SEE OR SEARCH THIS CLASS, SUBCLASS:
5, and 15+, for apparatus for joining work portions first by deforming and then by fusion bonding.
150, for forming a one-piece blank into a tube and bonding the seam.
SEE OR SEARCH CLASS 220, Receptacles,
610+, and 677+ for seam structures of metallic receptacles.
