Pen point for marking pen

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6368004
APP PUB NO 20010003566A1
SERIAL NO

09019524

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A pen point for a marking pen having a pen tip which includes a base portion formed by bundling polyester-type synthetic fibers having a fiber diameter of denier between about 1 and about 10, dipping the bundle in a synthetic resin adhesive and drying and solidifying the bundle. The resulting bundle is molded into a knife cut shape and integrally coated, together with the base portion, with a coating member formed of a thermoplastic synthetic resin, the thickness of said coating member being between about 0.01 and about 2.00 mm. In the present invention, the tip of the pen point for the marking pen is coated with a coating member formed of a thermoplastic synthetic resin such as polyethylene, polypropylene, polyacetal or vinyl chloride, whereby the side surfaces in which the ink in the pen point is soaked are not exposed. Consequently, even when a line is drawn using a ruler, the contact surface between the ruler and the pen point is not stained, making it possible to avoid the inconvenience of removing ink whenever it adheres to the ruler, and to prevent the tip of the pen point from being stained.

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First Claim

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Patent Owner(s)

  • TOMBOW PENCIL CO., LTD.

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Watanabe, Tomohiro Tokyo, JP 81 1330
Yoshida, Masahiro Toride, JP 512 4941

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