Oblong open folding packing box - has flaps on top face folded down against sides to reinforce them

摘要

The open oblong folding packing box is stamped out from a flat sheet of material formed with fold lines defining top and bottom faces. These are joined by side faces and extension tongues folded to form end faces. The top face has an opening (2) cut out of it and leaving lateral flaps (3), which are folded down on the inside against the sides to reinforce them. Notches (11,12) can also be formed along the edges so as to secure the boxes in position when stacked. The folded flaps can be glued to the box sides, and the tongues (10) can be glued together after erection.