Fiber-bundled part for writing instruments, and pen tip and writing instrument using the fiber-bundled part

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12187068
APP PUB NO 20230406029A1
SERIAL NO

18248089

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Abstract

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This application is related to 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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Patent Owner(s)

Patent OwnerAddress
MITSUBISHI PENCIL COMPANY LIMITED5-23-37 HIGASHI-OHI SHINAGAWA-KU TOKYO 1408537 ?1408537

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Izawa, Hirotake Tokyo, JP 14 64
Kamitani, Toshimi Tokyo, JP 28 93
Takahashi, Toshihiro Fujioka, JP 210 1533

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