Coil or double walled reel. (Machine-translation by Google Translate, not legally binding)

摘要

Coil or double-walled reel, formed by a core or core consisting of a paper or cardboard tube, at the ends of which are inserted two discs or pieces of appropriate material forming the flanges, characterized in that the core of the reel has its ends a recessed part forming a shoulder against which the part forming the flange is applied, this flange being fixed by flanging the end of the tube. (Machine-translation by Google Translate, not legally binding)