| 摘要 |
An open top, waterproof, cardboard box has an elongated rectangular bottom bordered by side and end panels which extend the length and width, respectively, of the bottom and are joined to form closed corners. Each side panel has a pair of wing portions between which a central portion of the side panel extends, the wing portions being defined by a pair of diagonal fold lines each of which intersects with a corner of the box. The end panels are folded so that they lie nearest the bottom of the box and the side panels are folded over and lie flat against the end panels, the wing portions being folded first with the end panels and then with the side panels whereby the wing portions are finally folded under the central portion of the side panels. The wing portions thereby acquire a fold bias that causes the central portion of each side panel to lean outwardly when the side and end panels are unfolded, allowing the box to have a minimum width at its bottom and still provide adequate lateral clearance for a cat to move about within the box. In preferred embodiment the side and end panels fold to form a box having depth sufficient for containment of and includes cat litter material, the end panels fully cover same and the side panels are fastened to the end panels with purchaser-rupturable adhesive or tap which seals the box.
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