| 摘要 |
PURPOSE: To provide a heating cutting edge whose thickness is thin and manufacturing cost is reduced by forming a self-heating type heating cutting edge to melt and cut a resinous tube in such a way that a resistor which is formed in a desired pattern and heats by current-carrying is arranged on a ceramic base board and a surface is covered with an insulating layer. CONSTITUTION: A heating cutting edge 1A used in a tube connecting device or the like has a ceramic base board 2, and a resistor 3 having a desired pattern where terminals 4 and 5 are arranged in both end parts is formed on this base board 2. An insulating layer 6 composed of an inorganic insulating material such as ceramics and glass is formed on the resistor 3 so as to cover a surface of the resistor 3 except a part of the terminals 4 and 5. Preferably, the resistor 3 is formed by baking this by printing and forming condustive paste in a desired pattern. According to its necessity, a temperature raising fusible part to be fused when a prescribed high temperature condition continues for a prescribed time, is arranged at least in a part of the resistor 3. |
