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A ruling pen is a drawing instrument for drawing with ink or with other drawing fluids. A ruling pen contains ink in a slot between two flexible metal jaws, which are tapered to a point. It enables precise rendering of the thinnest lines. The line width can be adjusted by an adjustment screw connecting the jaws. The adjustment screw can optionally have a number dial. Originally used for technical drawings in engineering and cartography together with straight rulers and French curves, it is today used for specific uses, such as picture framing or calligraphy.〔 ==See also== *List of pen types, brands and companies *Technical drawing tools 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Ruling pen」の詳細全文を読む スポンサード リンク
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