BALLPOINT PEN TIP

PROBLEM TO BE SOLVED: To provide a ballpoint pen tip which ensures insertion of a separate member such as a resilient member urging a ball in the direction of the fore end and can be produced in a stable manner, by preventing formation of a burr inside an ink flowing hole. SOLUTION: In the ballpoint...

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Bibliographische Detailangaben
1. Verfasser:	TOYOSAKI FUMIHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	BUREAU ACCESSORIES IMPLEMENTS FOR WRITING OR DRAWING PERFORMING OPERATIONS TRANSPORTING WRITING OR DRAWING IMPLEMENTS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a ballpoint pen tip which ensures insertion of a separate member such as a resilient member urging a ball in the direction of the fore end and can be produced in a stable manner, by preventing formation of a burr inside an ink flowing hole. SOLUTION: In the ballpoint pen tip, a rear hole having a larger diameter than that of the largest inscribed circle which can be described in a cross-sectional space within the extent of formation of an inward projecting part is formed in the rear part on the side opposite to the ball in the inward projecting part, while an ink flowing groove of which the bottom is almost in the same plane as the rear hole is formed in the inward projecting part. COPYRIGHT: (C)2008,JPO&INPIT