Importance

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Abstract

An electric lamp bulb (or similar fragile article) is retained in suspended centralized position within a collapsible open-ended carton of rectangular sleeve-like configuration by a dual-panel liner that extends across the interior of the carton and has apertured medial parts which nestingly receive and interlock with the bulbous portion of the lamp bulb. Each of the liner-panels has a pair of hinged flaps that swing in opposite directions and are displaced in criss-cross fashion by the bulbous part of the lamp bulb to form a single aperture in the associated liner-panel and a pair of cradle-like structures. The hinged flaps are so shaped and dimensioned that their free ends are pressed against the adjacent walls and diagonally-opposite corners of the carton by the inserted lamp bulb and thus produce buttressing forces which not only counteract the natural tendency of the carton to collapse but lock the carton in its erected form. The resulting self-erecting and self-squaring features permit the carton to be automatically set-up and loaded in a very efficient and reliable manner by automated lamp-packaging machines and the resulting lamp bulb packages to be readily stacked on store shelves.

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First Claim