with extensions of sides permanently secured to adjacent sides, with sides permanently secured together by adhesive strips, or with sides held in place solely by rigidity of material

Full Title

Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper (rigid pallets with side walls B65D19/02) > by folding-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form (specially constructed to allow collapsing and re-erecting without disengagement of side or bottom connections B65D5/36) > with extensions of sides permanently secured to adjacent sides, with sides permanently secured together by adhesive strips, or with sides held in place solely by rigidity of material