Writing instrument with a metal wire point

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4531853
SERIAL NO

06437624

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Abstract

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A writing instrument has a metal writing point formed by a bundle of fine metal wires, which at one end portion of the bundle are laterally compressed and held adjacent to each other with capillary passages between them. A substantially hemispherical tip is formed at the end surface of the end portion and a substantial part of the remainder of the bundle has a longitudinally extending hollow space at the center thereof. A long permeable ink feeding core is inserted into a hollow space for feeding ink to the passages in the tip and the bundle is encased in a cylinder which may be incorporated in a pen having an ink cartridge from which ink is supplied to the core. The compressed wires are durable and can be provided with a smooth hemispherical surface which moves smoothly over the paper. The passages and the core ensure a steady supply of ink. The writing point also enables sufficient pressure to be applied when writing for making copies with carbon or copy paper.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
SHACHIHATA INDUSTRY CO LTDNO 69 4-CHOME AMATSUKA-CHO NISHI-KU NAGOYA-SHI A CORP OF JAPAN AICHI-KEN

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hirabayashi, Masao Kawagoe, JP 4 20
Mizutani, Takeshi Kuwana, JP 8 94

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