Patent ID: 9714111
Date: 2017-07-25
CPC Classifications: B65D

Claim:
1. A cushioning material constructed from a single sheet material, comprising: a rectangular bottom segment; first and second side segments arranged at two opposite sides of the bottom segment, the first and second side segments being contiguous with the bottom segment across folding lines respectively; a top segment arranged at a side of the first side segment opposite from the bottom segment, the top segment being contiguous with the first side segment across a folding line; a middle segment arranged at a side of the second side segment opposite from the bottom segment, the middle segment being contiguous with the second side segment across a folding line; an engagement segment arranged at a side of the top segment opposite from the first side segment, the engagement segment being contiguous with the top segment across a folding line; a pair of first flaps arranged at two sides of the middle segment perpendicular to a side thereof at which the second side segment is contiguously arranged, the first flaps being contiguous with the middle segment across folding lines respectively; a penetrated hole formed to extend from the middle segment beyond folding lines into parts of the first flaps respectively, the penetrated hole to be penetrated by the engagement segment; a pair of second flaps arranged at two sides of the engagement segment perpendicular to a side thereof at which the top segment is contiguously arranged, the second flaps being contiguous with the engagement segment across folding lines respectively, the second flaps having engagement portions formed at respective tip ends thereof; a pair of first engagement grooves formed at gaps between the first side segment and the top segment by extending the first side segment such that the first side segment embraces the top segment from opposite sides; and a pair of second engagement grooves formed by extending the penetrated hole at opposite ends thereof, wherein the bottom segment, the first side segment, the second side segment, and the top segment are folded into a rectangular column such that the second flaps and the engagement segment are inserted into the penetrated hole, the first flaps are folded away from the first side segment and the middle segment is folded toward the first side segment such that the second engagement grooves are fitted in the first engagement grooves, the engagement segment is folded to be substantially perpendicular to the top segment and the second flaps are folded to be substantially perpendicular to the engagement segment such that the engagement segment is engaged with the first flaps, with a result that the middle segment and the top segment are held substantially parallel to the bottom segment.