Pen core for writing instrument
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United States of America Patent
Stats
-
Dec 3, 1985
Grant Date -
N/A
app pub date -
Jun 1, 1984
filing date -
Jun 3, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pen core for a writing instrument, particularly, for use in a recorder in which writing must be continuously carried out over long periods using a relatively small ink supply. The instrument has an ink conducting core for conducting ink to a writing member, and a barrel with an ink reservoir, the barrel being fitted on the outer wall of the pen core body. An annular groove in the form of a single continuous passageway is formed in the outer wall of the pen core body, the annular groove having a front end connected to an ink sucking groove, which is in turn communicated with the ink conducting core. An air passageway having a front end communicated with an air hole and a rear end communicated with the rear end of the annular groove is formed in the outer wall of the pen core body in such a manner that the air passageway does not cross the annular groove.
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