| 摘要 |
PURPOSE:To prevent deterioration with the lapse of time of a border between a heating body and a conductor electrode without deteriorating the temperature property of the heating unit by making the form of the edge of the conductor electrode superposing on the belt-form heating body to make the extending length longer than the width of the belt-form heating body. CONSTITUTION:A conductor electrode 3 is formed to make the edge 3a superposing on a heating body 2 cross obliquely to the heating body 2. As a result, the extending length of the edge 3a of the electrode 3 crossing obliquely to the heating body 2 in such a way is made longer than the width size of the heating body 2. Furthermore, since the edge 3a of the electrode 3 crosses obliquely to the heating body 2, the border (the edge 3a) between the electrode 3 and the heating body 2 is existing along a specific range in the longitudinal direction of the heating body 2. As a result, the temperature inclination from the high temperature heating part A in the heating body 2 to the low temperature part C in the electrode 3 is relaxed by a border B in a specific length range in the longitudinal direction of the heating body 2. Consequently, a thermal stress generated between the heating body 2 and the electrode 3 is also relaxed. |
