Temperature indicating display device
First Claim
1. A temperature indicating display device comprising an information recording film layer having information recorded therein and a temperature detecting agent layer containing a substance of which a state shifts dependently on temperature, wherein the state of substance in the temperature detecting agent layer shifts upon undergoing a predetermined temperature, so as to change a display of the information recorded in the information recording film layer.
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Accused Products
Abstract
A temperature indicating display device capable of displaying a thermo-history above a predetermined temperature reliably and irreversibly. Moreover, it is possible to provide a laminated body having a temperature detecting layer and an information recording film layer. When the temperature indicating display device is exposed to a predetermined temperature, an irreversible shift is caused and the temperature history can be displayed. Moreover, the temperature indicating display device includes an information recording film layer containing information, an information record holding layer for holding the information, and a temperature detection agent layer composed of a material whose state is shifted according to a temperature and is characterized in that when a predetermined temperature is detected, the material of the temperature detection agent layer is changed so as to change the display state of information recorded in the information recording layer. A laminated body using the temperature indicating display device, a vessel containing the device, and a labeled temperature indicating display device are also disclosed. Furthermore, the present invention provides a side-type temperature indicating display device in which a conventional information display member can be used as it is.
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Citations
34 Claims
- 1. A temperature indicating display device comprising an information recording film layer having information recorded therein and a temperature detecting agent layer containing a substance of which a state shifts dependently on temperature, wherein the state of substance in the temperature detecting agent layer shifts upon undergoing a predetermined temperature, so as to change a display of the information recorded in the information recording film layer.
- 14. A temperature indicating device comprising a temperature detecting agent placing part having a substance of which the state shifts dependently on temperature therein, and a diffusion layer is disposed to touch the placing part.
- 25. A temperature indicating display label comprising a substrate, a separator containing a temperature detecting agent layer containing a substance of which the state shifts dependently on temperature, and an information record holding layer containing an information recording layer having information recorded therein.
- 33. A laminated body comprising layers comprising a temperature detecting agent layer containing a substance of which the state shifts dependently on temperature, an information recording film layer, and an information record holding layer.
Specification