Crow's Mouth (Crow's Mouth) - Karasuguchi (English spelling) Bow pen

Japanese: からす口(烏口) - からすぐち(英語表記)bow pen
Crow's Mouth (Crow's Mouth) - Karasuguchi (English spelling) Bow pen
A drafting tool used to ink straight or curved lines. It has a handle, two blades, and a screw to adjust the distance between them. India ink or sumi ink is placed between the blades to draw lines. To obtain accurate lines, the blades are sharpened to a sharpness that does not cut the paper, so materials that are particularly designed for wear resistance are used to minimize wear during use. The word "crow's mouth" originally referred to the split at the tip of a blade, but when Western-style drafting instruments began to be made in the early Meiji period, the name came to be used because of their similar shape.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
製図用具の一つで,直線あるいは曲線の墨入れを行うのに用いる器具。柄と2枚の刃およびその間隔を調整するねじを有し,刃の間に墨汁またはインクを含ませて線を引く。正確な線を得るために刃は紙が切れない程度に鋭利に研いで使用するため,使用中摩耗することが少ないように,とくに耐摩耗性を考慮した材料が使用される。もともとからす口という言葉は,刃物の切っ先の割れのことをいったが,明治初期に西洋式の製図器械が作られるようになったとき,その形のよく似ているところからこのように呼ばれるようになった。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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