Packing assembled from plastic sheets and used in trickling cooler or for below-ground drainage, is held together by complementary fasteners, which slide, snap and hook together

摘要

Sealed, perforated or mesh-like plastic sheets (12) have first types of interlocking component on their upper surfaces and second types of interlocking component on their lower surfaces. The two types interlock, when parallel sheets are slid- or rotated together. This holds the sheets together, as a pack. The first type includes a stud (26) with a bar (28) and an enlarged- or hooked end (30). The second has an opening with a constriction (42) past which the stud is snapped. It enters a matching recess (38) and the end (30) of the bar hooks over an edge (44) of the second type of component.