Abstract: An interlock for a partition assembly made of paper board or the like and having interlocking longitudinal and cross partition strips that form a divider for insertion in a box for shipping items such as bottles, cans, and the like. The interlock includes a slot in each of the longitudinal and cross strips, the slots interfitting to lock the strips together but allowing them to hinge freely between collapsed and open configurations.

Abstract: A divider used in containers has intersecting partitions and two parallel tying strips located centrally of the divider. The tying strips hold the partitions substantially parallel so that the divider may be inserted by machine into a container and will remain in a fixed spacial relationship while the container is filled with goods by automatic casing machinery. The partitions and the tying strips have transverse cuts and are joined by interlocking the cuts in a rectilinear network. The corners of the partitions and tying strips and the openings to the cuts are relieved to allow ease of assembly of the partitions and strips and insertion of the complete divider into a container by automatic machinery. The partitions and tying strips are formed by cutting and scoring cardboard stock on conventional die cutting machines.