| 摘要 |
A method and an apparatus for forming a top assembly for desks, tables, credenzas and similar items having a core and an outer layer of a thin hard laminated plastic sheet adhered to the core. The thin hard laminated plastic sheet covers the top surface of the core and is wrapped around the side and end walls and undersurface edges thereof. The laminated plastic sheet is unbroken by seams or rims along the side and end edges of the top assembly. In forming the top assembly, a one-piece thin hard laminated plastic sheet is adhered by cement to the top surface of the core and is positioned so that side and end portions of the laminated plastic sheet extend beyond the side and end edges of the top surface. A selected extending side or end portion of the laminated plastic sheet is heated to soften it and make it pliable. The softened laminated plastic is bent downwardly and pressed into contact with the adjacent adhesive coated side or end wall of the core thereby adhering the laminated plastic sheet to that wall. The bending and pressing are continued thereby bending the laminated plastic sheet inwardly to adhere it to the edge of the undersurface of the core. This operation is repeated for each side or end of the top assembly. The apparatus used includes a hydraulic actuating clamping bar for holding the top assembly in place during bending operations and a hydraulic actuated bending or forming bar which bends the softened laminated plastic sheet downwardly and wraps it around and under the side and end walls of the top assembly core. During bending operations, the forming bar pivots about an axis which is moving in an arcuate path. The movement of the forming bar in the arcuate path is opposed by spring means.
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