FIBER-BUNDLED PART FOR WRITING INSTRUMENTS, AND PEN TIP AND WRITING INSTRUMENT USING THE FIBER-BUNDLED PART
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United States of America Patent
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Issued Date -
Dec 21, 2023
app pub date -
Oct 7, 2021
filing date -
Oct 9, 2020
priority date (Note) -
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Abstract
Provided is a fiber-bundled part for writing instruments having excellent strength and durability, as well as a pen tip and a writing instrument using the fiber-bundled part, which can be suitably used for pen tips, ink feed cores and relay cores of writing instruments such as marking pens and felt-tip pens. The fiber-bundled part for writing instruments of the present disclosure is used for the ink feed core leading to the pen tip or a writing pen core, and comprises a multifilament of long fibers having different melting points, and the multifilament at least contain crimped fibers.
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