Mitsubishi Pencil Company, Limited

Takanori Suzuki

Toshimi Kamitani

Tooru Nakajima

Satoru Banzai

Yoshiharu Namiki

Yosuke Setagawa

Hitoshi Kino

Provided is a writing instrument suited to ballpoint pens, marking pens and the like in which a flow pressure of an ink applied to a pen tip is controlled to a fixed level to prevent an ink direct flow phenomenon reverse flow phenomenon. The above writing instrument comprises a pen tip disposed at a front part of an ink tank, an ink received in the ink tank, a follower filled at a rear part of the ink, and a capillary porous member provided with a capillary force, which is arranged at a space part between a rear part of the follower and a rear end part of the ink tank in a state in which the follower is filled, wherein the pen tip is sealed when a cap is put on the writing instrument.

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Fujioka, Japan

Takanori Suzuki