| 摘要 |
A packaging case (C;C') erected by folding from a one-piece vacuum-formed moulded sheet, has rectangular walls ( 1 - 4;71 - 74 ) that fold, and are clipped closed, about an article (A;S) to be protected from shock. The ends of the case are almost- completely closed by conformal edge-to-edge abutment of end-flanges ( 8 - 11;78 - 81 ) of serpentine profile that are upstanding from the walls ( 1 - 4;71 - 74 ). The flange-edges are each moulded with ridges ( 13,15 ) and grooves ( 14,16 ) that nest ridge-within- groove with those of the abutting edges, for absorbing shock. The walls ( 1 - 4;71 - 74 ) are hinged together edge-to-edge, and at their edges rise in steps ( 23,24,33.34,43,44 ) to a central plinth ( 22,32,42 ). The steps ( 23,24,33,34,43,44 ) of adjacent walls abut one another within the erected case for shock absorption, and each wall ( 1 - 4;71 - 74 ) is strengthened by circular recesses ( 25 - 28,35 - 38,45 - 49 ) of reducing diameter with depth, let into its plinth ( 22,32.42 ). The circular recesses produce frusto-conical shock-absorbing projections ( 57,58,60,62,63 ) on the outside of the case. The case (C') may accommodate a stack (S) of component-carrying trays (T) protected by end-caps ( 83 ).
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