55241 ⎘
Making articles of cellular structure, e.g. insulating board honeycombed structures, i.e. the cells having an essentially hexagonal section; Making honeycomb cores, e.g. by piling a plurality of web sections or sheets; Plane webs having essentially longitudinal adhesive strips being folded transversely into stacks or being cut transversely into sections which are piled, e.g. zigzag-folding the webs preceding the cutting involving laminating the expanded core