Oki Electric Industry Co., Ltd.

Astra Co., Ltd.

Masakuni Anada

Hiroshi Kikuchi

Takashi Itaya

Hirotaka Ichijo

Takahiro Karino

Katsuhito Sasahara

In an exemplary embodiment, a blade portionis formed by a plurality of bladesbeing arrayed on a front surface of a main body at an even interval while forming blade striation portionsbetween adjacent blades. Each bladeis cut into a circular-arc shape. A pitch between the bladesis in a range of 1 to 3 mm. A recess-portion apex composed of a cut surface of each bladehas a rounded shape with a radius of 1.0 to 3.0 mm. A protrusion-portion apex of the blade striation portionhas a rounded shape with a radius of 0.1 to 0.5 mm. A tip of the bladeformed by the blade striation portionhas a rounded shape with a radius of 0.1 to 0.5 mm.

Peeling blade

An ink ribbon cassette to be used in wire dot printer has an ink supply to lengthen a life cycle thereof. An ink ribbon is held between a drive gear and an idle gear and is delivered thereby. The ink supply contacts the idle gear so that ink is supplied from the idle gear to the ink ribbon. The teeth of the idle gear are specifically shaped such that the bottom of the teeth are formed in the shape of a circular arc so that the ink is uniformly supplied to the ink ribbon.

Ink ribbon cassette including gear teeth configured to re-ink the ribbon

Growing community of inventors

Fukushima, Japan

Masakuni Anada