Writing instrument with overflow chamber and return to supply
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United States of America Patent
Stats
-
Apr 9, 1985
Grant Date -
N/A
app pub date -
Jun 14, 1983
filing date -
Jun 15, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A writing instrument of an extremely simple structure in which stored ink previously extruded upon increase of the internal pressure of an ink chamber is subsequently sucked up by decrease of the internal pressure of the ink chamber and returned to the ink chamber, thereby preventing the outputting of ink drops in a downward orientation of pen, particularly when a large amount of ink is stored.
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Family
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Cited Art Landscape
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