Abstract: The horizontally extending cover side flaps of a plurality of identical filled closed cartons, are glued, down folded, pressed and set by continuously advancing the cartons individually and successively, in untimed relation, between upper and lower carrier belts and along a path through an adhesive applying zone, a flap folding zone and a compression zone. The upper carrier belts are mounted on a sub-frame structure as are the gently curved down fold bars and are raised and lowered relative to the main frame for runs of different height cartons. The glue pots are independently movable vertically and laterally. The compression rolls are resiliently and yieldably mounted to individually and successively press and set the hot melt adhesive without undue pressure which might retard the untimed advance of the cartons.

Abstract: A one piece, flat, sheet of cardboard, or the like, is cut, slit, and scored to form a flat blank comprising an elongated, shallow, main tray section with a fore part for french fries and a rear part for a hamburg, as well as a laterally extending, shorter, shallow, tray section, foldable over the rear part to enclose the hamburg. The main tray includes a cover flap which folds over the french fries in the fore part of the main tray. Tongues and slots lock the dished hamburg cover and the flat french fry cover in closed position. The shallow, double trays, when partially erected, nest in stacks for storage and shipment because of tapered side walls.