Direct liquid-writing instrument
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United States of America Patent
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Feb 14, 2012
Grant Date -
Jan 29, 2009
app pub date -
Jun 11, 2008
filing date -
Jun 11, 2007
priority date (Note) -
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Abstract
The present invention provides a direct liquid-writing instrument without ink leakage from the pen-tip even after a long period of use. Specifically, it provides a direct liquid-writing instrument having an ink-retaining part in a bellows-like shape, in which at least the ink-retaining part in a bellows-like shape is made of: 20 to 95% by mass of (A) a polyamide-based resin; and 80 to 5% by mass of (B) at least one resin selected from a styrene-based resin, an olefin-based resin, and a polyphenylene ether resin.
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