Conical nib and writing instrument incorporating the same
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United States of America Patent
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Jul 2, 2013
Grant Date -
Nov 10, 2011
app pub date -
May 7, 2010
filing date -
May 7, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A nib of a writing instrument is made of a carbon-resin mixture obtained by mixing a plastic material with carbon fiber. An ink feed core is provided with a nib cover. The nib cover is disposed on an outer periphery of the ink feed core between the nib and the ink feed core. The nib cover is configured to closely adhere at least to an inner periphery of the nib at the tip of the nib. A space defined between the nib and the ink feed core is filled up with the nib cover. The nib is made of a carbon-resin mixture obtained by mixing a plastic material with carbon fiber. With this configuration, a nib having high wear resistance can be obtained and duration of the nib and the writing instrument can be prolonged.
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