| 摘要 |
<p>A sheet of material, suitable for bending along a bend line to a predetermined angle, includes one planar segment on one side of the bend line, another planar segment on another side of the bend line, one displacement extending in the thickness direction of the sheet of material from the one planar segment, and another displacement extending in the thickness direction of the sheet of material from the another planar segment. The displacements are dimensioned and configured such that they engage one another during bending and limit the angular displacement of the one side relative to the another side. As such, the displacements self-key the resulting corner at the predetermined angle and provide structural integrity to the corner. The sheet of material, having a plane-to-plane joint, includes a tongue formed in one planar segment, a receiver formed in another planar segment for longitudinally receiving the tongue, a latch protrusion formed in the one planar segment, and a latch recess formed in the another planar segment. The receiver holds a lower surface of the one planar segment in close proximity with an upper surface of the another planar segment and transversely limits the planar segments. The latch protrusion and latch recess are self-latching upon insertion of the tongue into the receiver. Methods of preparing and bending such sheet materials are also disclosed.</p> |
