Abstract: A box for containing two or more vertically stacked products, such as pizzas, includes a plurality of vertical side panels, along with horizontal bottom and top panels. At selected corners where pairs of adjacent side panels come together there are formed knock-in tabs that act as shelf supports for an upper product. Each tab is formed by cutting two parallel slits through the box material. The tabs are pushed inwardly towards the inside of the box to provide shelf supports for a disk upon which a product is placed. The tabs provide for ventilation into the box. The top of the box has a pair of flaps and associated tuck tabs that cooperate with a locking roll-over on the front side panel of the box to provide for a quick and easy means of opening and closing the box.

Abstract: In a corrugating system, a supplemental means for insuring that the liner and corrugated medium are properly conditioned with adhesive or bonding material along the entirety of its length and width of the bondable surface as the machine is starting up following down time to avoid subsequent board delamination.