Ballpoint pen tip and ballpoint pen

Ballpoint pen tip and ballpoint pen

A ballpoint pen tip includes a ball and a ball holder for rotatably holding the ball. The ball includes a ball body and a first carbonaceous film formed so as to cover a surface of the ball body. The first carbonaceous film has carbon atoms and oxygen atoms bonded to some of the carbon atoms. The ra...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: NAKATANI TATSUYUKI, NITTA YUKI, TAKAYAMA KOUICHI, MASUDA HIROTAKA, OKAMOTO KEISHI, ANDO SATORU, TOYOTA KUNIHIRO, KAJIWARA TAKUMI
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:A ballpoint pen tip includes a ball and a ball holder for rotatably holding the ball. The ball includes a ball body and a first carbonaceous film formed so as to cover a surface of the ball body. The first carbonaceous film has carbon atoms and oxygen atoms bonded to some of the carbon atoms. The ratio of carbon atoms bonded to oxygen atoms to the total carbon atoms at a surface of the first carbonaceous film is equal to or greater than 0.1.