Box Joints - Manufacturing Joint

A flat piece of corrugated that has been cut, slotted and scored, is called a box blank. For some box styles two parts of the box must be joined together. The way to join the joints is either by glue, tape or staples. This joint is known as the manufacturer's joint.

Glues are most often used to attach joints together. Using glue requires a glue tab on the box blank...this glue tab will later become one of the boxes corners. If there is no tab the box must be taped together. Boxes can also be stitched (otherwise known as stapled). Stitched boxes also require a tab. Item 222 (Carrier Rules for shipping) requires a minimum of 1 1/4 -inch overlap with adhesive coverage of the entire contact area, and gives specifications for the tape used and the distance between staples.

Not all boxes have manufacturer's joints, but most widely used box styles do.