作者: Robert H. C. M. Daenen
DOI:
关键词: Base (geometry) 、 Cover (algebra) 、 Hinge 、 Integrally closed 、 Flat surface 、 Container (type theory) 、 Hermetic seal 、 Structural engineering 、 Engineering
摘要: The lunch box comprises a generally square base container and correspondingly shaped cover each being integrally formed from the same polymeric material. has an integral handle extending forwardly one side hinge tabs rearwardly opposite side. cover, in turn, blocks with slots for receiving tabs. arrangement is such that open position, top of coplanar bottom so both can engage flat surface function as serving trays contents box. In second wherein closed, simply swung by flexing over to close upper opening. openings include cooperating lip step structures providing hermetic seal also frictionally holding place on container.