| 摘要 |
<p>A multi-panel hollow door (10) has a core (18) made of corrugated paperboard. The core (18) is formed from a stack (20) of plies (22) in which adjacent plies (22) are adhered to one another in accordance with a predetermined pattern of adherence. The stack (20) is expanded in a direction perpendicular to the plies (22) to form an elongated series of cells (30) disposed longitudinally between transversely spaced panel indentations (16) of a door skin (12), at a central region of the door (10). Each cell (30) has a pair of transversely spaced vertices (40), and juxtaposed end portions (30c) of vertex-forming plies form tabs (42). Each tab (42) is preferably oriented to overlap an adjacent portion of a vertex-forming ply, the desired orientation being obtained by partial slitting of a single vertex-forming ply. Unexpanded end portions of a stack of plies may be broken off to form pads (44) between corresponding portions of the skins (12).</p> |
