Shachihata Industry Co., Ltd.

Shachihata Industrial Co., Ltd.

Takeshi Mizutani

Masao Hirabayashi

Makoto Mizuno

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.

Writing instrument with a metal wire point

A writing instrument with a ballpoint pen comprising a metallic fine rod having a plurality of capillary holes for flowing ink from one end thereof through the other end in the interior thereof, a short cylindrical portion extending from one end thereof, and an annular narrowed portion on the peripheral edge of the front end of the short cylindrical portion; a hard ball rotatably fitted to and held inside the annular narrowed portion and the short cylindrical portion and being in contact with one end of the metallic fine rod inside the short cylindrical portion; and means for introducing aqueous ink connected to the other end of the metallic fine rod.

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Kuwana, Japan

Takeshi Mizutani