Writing implement
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United States of America Patent
Stats
-
Jul 4, 2006
Grant Date -
Dec 2, 2004
app pub date -
Aug 30, 2002
filing date -
Aug 31, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A writing implement includes a cylindrical shaft member, a pen tip member which is fixed to one end of the shaft member and from which colored ink seeps out, liquid for ink which is stored in the shaft member and which comprises a major component of the colored ink seeping out from an end of the pen tip member, colorant to be added to the liquid for ink, and a valve member for isolating the colorant from the liquid for ink. In the writing implement, at least a part of a cylindrical side surface of the shaft member corresponding to a part where the liquid for ink is stored is formed to be transparent, the valve member is positioned between the storing part of the liquid for ink and the colorant, and the storing part of the liquid for ink is provided with a pressure-regulating part.
First Claim
Family
International Classification(s)
Cited Art Landscape
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