초록 ▼

A dome shaped crown for a clamshell container is formed by two sets of sidewalls having different shapes. A narrow space is provided between adjacent pairs of sidewalls, the spaces permitting venting of warm, moist air due to the presence of a heated sandwich packaged in the container. The container

A dome shaped crown for a clamshell container is formed by two sets of sidewalls having different shapes. A narrow space is provided between adjacent pairs of sidewalls, the spaces permitting venting of warm, moist air due to the presence of a heated sandwich packaged in the container. The container is formed from a unitary blank of paperboard. In one embodiment, the crown is dome shaped and the lower tray is provided with straight walls. In the second embodiment, both the crown and the lower tray have sidewalls of different slopes. Any type of releasable latch between the two halves may be employed.

대표청구항 ▼

[ What is claimed is:] [1.] A unitary blank of paperboard for forming a clamshell container, said blank including an upper crown half and a lower tray half, said upper crown half including a polygonal central top panel having edges, a plurality of sidewall panels secured to said top panel edges to f

[ What is claimed is:] [1.] A unitary blank of paperboard for forming a clamshell container, said blank including an upper crown half and a lower tray half, said upper crown half including a polygonal central top panel having edges, a plurality of sidewall panels secured to said top panel edges to form a ring of upper sidewall panels, said upper sidewall panels each having at least two foldably connected sections, one of said two sidewall sections being a radially innermost section and the other of said two sidewall sections being a radially outermost section, said upper sidewall panels having foldable glue tabs, circumferentially positioned venting spaces between adjacent said upper sidewall panels, said venting spaces located radially inwardly of and radially aligned with said glue tabs, said lower tray half including a polygonal central bottom panel having edges, a plurality of lower sidewall panels secured to respective said bottom panel edges to form a ring of lower sidewall panels, said lower sidewall panels having foldable glue tabs, said upper and lower blank halves foldably joined together.