Seiko Epson Corporation

Yuki Nishimoto

Hideki Nishimura

Toshihiro Hagiwara

A thermal printer has a thermal head with multiple heat elements for printing on roll paper; a measurer that measures heat element resistance; printer memory storing a resistance evaluation table relating the resistance of the heat elements to heat element defect levels defined based on a specific range of reflectivity in the symbol image; and an evaluator that references the resistance evaluation table stored in printer memory, acquires a defect level based on the resistance measured by the measurer, and evaluates the defect state of the thermal head based on the defect level of a consecutively adjacent count of heat elements.

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Shiojiri, Japan

Yuki Nishimoto