| 摘要 |
<p>Residual lifetime indicator device for perishable consumer products, comprising a material having a property which can change as temperature changes according to a given function, actuating means (102, 104, 204; 10) which act on said material to make it show the aforesaid property, and indicating means (105; 308) coupled to the material/actuating means combination, said indicating means indicating the residual lifetime in relation to the expiry date of the product, said material being a fluid with a viscosity which can change depending on temperature, which fluid flows into a pipe having a given section, characterized in that the actuating means comprise an element to apply a pressure differential to said fluid (102, 104, 204; 10), the flow of said fluid being connected to said indicating means (105; 308), activating means (604; 14) to activate said element being provided to apply a pressure differential to said fluid (102, 104, 204; 10).</p> |
