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Hinge-mak′ing ma-chine′.

In the Evrard and Boyer machine the sheet-metal is placed in the machine in coils, there being two coils of sheet-brass for the two halves of the hinge-body, and a coil of wire to supply the connecting bolt or rivet. The material is drawn off from the coils as it is wanted, the wings of the hinge are stamped out by punching dies to the proper shape, the salient parts, which are to form the tube for the connecting bolt, are formed upon the wire itself which is to furnish the bolt, and this is then cut off to the proper length. Before the hinge is dismissed, the screw-holes, by which it is to be secured to the wood, are formed and countersunk to the form of the screw-head. The machine completes a hinge every second. Butt-hinges are usually molded on match-plates.

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