Box made from corrugated cardboard - has alternate layers of plane and corrugated sheets glued together

摘要

The box is obtained by cutting and scoring the sheet of composite cardboard. The composite sheet is made from alternate layers of plain and corrugated cardboard. The sheets are glued together. There is an even number of sheets, so that one outside surface is plain and the opposite surface corrugated. The pitch of the various corrugated sheets is different to add strength. The broad pitched cardboard is on the inside of the composite sheet.