WRITING BALL, METHOD FOR MANUFACTURING WRITING BALL, AND BALLPOINT PEN WITH WRITING BALL
Number of patents in Portfolio can not be more than 2000
United States of America
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Issued Date -
Dec 19, 2024
app pub date -
Nov 17, 2022
filing date -
Nov 17, 2022
priority date (Note) -
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status (Latency Note)
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Abstract
In order to provide a writing ball capable of suppressing wear of a ball seat of a ballpoint pen tip and obtaining stable ink outflow, a writing ball that is a sphere, the sphere comprising, at least: a first hard component containing a first metal; a second hard component containing a second metal; and a binding component, the writing ball comprising: a first outer surface from which the first hard component is exposed, the first outer surface being an outermost surface of the sphere; and a recess including, as a bottom surface, a second outer surface from which the second hard component is exposed, the second outer surface being recessed inward from the first outer surface, wherein the first outer surface includes a smooth surface is provided.
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