| 摘要 |
PURPOSE: A rheoreceptor of soft wood is provided to prevent erasion of characters or pictures written by pencil or charcoal by putting absorbing the characters or pictures into cellulose and adding heat. CONSTITUTION: A rheoreceptor of soft wood comprises a heat plate(73), a water storage container(23), a spring cap, and a roller(25). The heat plate is chemically changed by adding heat to pencil lead or charcoal by ironing a part where water is absorbed in. The spring cap supplies water from the water storage container or stop the supplying according to the operation of the roller. The roller is wetted with water in order to absorb the pencil lead or charcoal into cellulose of the paper. The roller comprises grooves with constant interval. When the roller does not roll, a protrusion by the spring cap does not stimulate the roller. In a center part of the roller, a silicon layer is formed.
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