Abstract: A folding auto platform carton having a lock bottom includes two similar platform sections which fold down with the bottom panels. When the carton is set up, each platform section forms with the underlying bottom panel a box girder which rigidifies the carton. Also abutting walls of the two box girders form a medial reinforcing and supporting rib extending all along the platform which prevents platform sag.

Abstract: A collapsible carton of the type composed of a series of hinged-together panels folded spirally to form a double-walled tube has spacers at all four corners of the carton which extend between the corresponding inner and outer walls to maintain their spaced-apart relationships. A divider, preferably also double-walled, extends between opposite inner walls of the carton dividing the carton interior into two compartments.

Abstract: A two bulb carton formed from a single blank with a step fold has partition walls which space the bulbs from the carton outer walls and from each other.

Abstract: A box for containing an article having a relatively stiff planar portion positioned flush against the front or back wall of the box and an internal tuck closure flap hinged to the front or back wall at an end of the box includes a tab hinged to the wall of the box opposite the closure flap hinge that folds inwardly so that when the closure flap is tucked inside the box to close off an end of the box the closure flap overlaps the tab. The tab prevents the article from hanging up on the edge of the closure flap or interfering with the tucking of the closure flap inside the box.