Heat signal writing device

Abstract

A heat signal writing device forming a clear writing pattern of a heat signal is provided. A heat signal writing device 10 for writing a heat signal in a medium traveling through a channel, which is secured to an appropriate position on the channel through which the medium flows, includes a Peltier element 11 for writing the heat signal having a temperature change according to a desired pattern by heating or cooling; a channel supporting member 12 shaped as a pyramid formed of a heat conductive material and having a bottom surface in close contact with a surface of the Peltier element 11, the tip of the pyramid being in direct contact with the channel 1; a heat sink 13 in close contact with another surface of the Peltier element 11; and a heat-resistant cover for covering the periphery of the Peltier element 11, excluding a channel contact surface 12a at the tip, and the channel supporting member 12.

Dependencies are inferred from the claim text.