Mitsubishi Pencil Company, Limited

Yasuaki Ogiwara

Toshimi Kamitani

Takahiro Osada

Takao Koyama

Naohiko Moriya

Atsushi Sato

A writing implement having a pen tip that can achieve excellent ink outflow performance and an increase in the effective area of a viewer portion allowing recognition of the writing direction, relative to the whole pen tip. The writing implement is a writing implement A which includes a pen tipfeeding ink from a writing implement bodyand having a viewer portion through which the writing direction can be recognized, and is characterized in that the pen tipis configured of, a least, a writing partand a holding bodyhaving a viewer portion, and the holding portionhas a sheet-shaped ink feederformed with slits or bumps on the surface and inside thereof to produce a capillary action.

Writing implement

A medium for electrophoretic display using a liquid for electrophoretic display which can reversibly change a visible state by action of an electric field includes a medium comprising each independent structures of microcapsules or cells filled with a liquid for electrophoretic display comprising at least alkylpolyetheramine having a structural unit represented by a specific structural formula, one or more kinds of fine particles, a dispersant and a dispersion liquid medium, wherein the fine particles contain fine particles subjected to surface treatment for making lipophilic. Also, an electrophoretic display device includes a display device comprising a pair of substrates in which a light-transmitting electrode is formed on at least one substrate and the medium for electrophoretic display described above between the substrates. The electrophoretic display medium and the electrophoretic display device each using the above display liquid for electrophoretic display have a high contrast on a display face and can display the contrast with high reliability even in repetitive display, and they are excellent as well in a response.

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Fujioka, Japan

Yasuaki Ogiwara