| 摘要 |
PURPOSE:To construct a timer simply at a low cost by utilizing material requiring a certain time to change one condition to another visually. CONSTITUTION:Material which changes for a certain time from one condition to another visually is utilized to construct a timer. For example, a tablet type white wax 2 is packed into a non-white plastic small container 1 and a transparent vinyl lid 3 is thermally welded thereon. Then, this small container 1 is thermally welded on the back of a lid 5 with a hole of cup noodle 4 with the tablet type white wax 2 visible through the hole. With such an arrangement, as hot water is poured into cup noodle 4 and left alone, the tablet type white wax 2 melts gradually and then, thoroughly by steam heat to become transparent a certain time later. Thus, after a certain time elapses, it is possible to learn that noodle in the cup 4 is ready to eat. |
