Abstract: A partially overmolded component having a precisely defined overmolding edge includes a component having a protruding elongate rib and the overmolding having a terminal edge abutting the protruding elongate rib. The rib defines surfaces that provide a greater area of contact between the component and an overmolding tool and a more tortuous flow path to bleed-through.

Abstract: A mold has at least one vent hole formed in the mold. The vent hole is positioned to allow egress of air from the mold. The vent hole has an inside end and an outside end. The vent hole has a cross section that increases in area from the inside end to the outside end. The vent hole may have a shape of a trapezoidal prism, a truncated pyramid or a truncated cone; the cross section of the vent hole may be a rectangle. A preferred mold has three air vent holes at three corners of the mold. An integrated circuit is placed within the mold. A material to be molded is injected into the mold to encapsulate the integrated circuit. Mold cleaning is facilitated by the shape of the vent, and plastic flashes may be easily removed through the vent hole.

Abstract: A built-up chair, comprising two stands connected together by a connecting bar, two pairs of supports respectively mounted on said two stands at the top, two side bars respectively mounted on said two pairs of supports and connected together by two cross bars for holding a seat, and a back support connected between said two pairs of supports at the top. By fastening connecting bolts in connectors, the two stands and the two side bars are respectively connected to the connecting bar or the cross bars at two opposite ends. The seat is fastened in the two side bars through sliding joint and supported by the two cross bars. The back support has two rows of holes for fastening in between the two pairs of supports by screws at the top. The two pairs of supports have each a plurality of parallel grooves at the middle for adjusting the level position of the side bars easily.