| 摘要 |
Accumulation of foreign matter on the surface of the thermal head that can cause printing defects can be reliably prevented. The downstream edge 54a of the surface 52 of the thermal head 5 is substantially flush with the downstream end of the paper nipping area C of the thermal head 5 and the platen roller 8 in the thermal printer 1. The downstream end 54 extending from the downstream edge 54a in a direction perpendicular to the back side is connected to a through-hole 66 (foreign matter receptacle) formed in the heat sink 6. Foreign matter on liner-less label paper 11 clings to the downstream end 54 of the thermal head 5 after passing the paper nipping area C, and is then fed along the downstream end 54 into the through-hole 66 on the back. Foreign matter does not accumulate on the surface 52 of the thermal head 5, and problems such as streaking and other printing defects caused by foreign matter on the surface 52 of the thermal head 5 do not occur.
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