Ballpoint pen
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United States of America Patent
Stats
-
Jan 3, 2017
Grant Date -
Mar 19, 2015
app pub date -
Sep 4, 2014
filing date -
Sep 6, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A ballpoint pen 10 includes: a ballpoint pen tip 20 having a writing ball 30 and a holder 21 holding the writing ball 30; a shaft tube 12 to which the rear end part of the ballpoint pen tip 20 is mounted; and ink 40 accommodated in the shaft tube 12. The holder 21 has an ink guiding hole 26 formed from the rear end thereof toward the head end thereof and a ball house 22 formed with the inner circumference near the head end of the holder 21 expanded. The writing ball 30 is formed of a zirconia sintered body with the content of an aluminum element being less than 0.1 weight %, and the ink 40 contains inorganic particles 41.
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Cited Art Landscape
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