| 摘要 |
PURPOSE:To obtain stabilized temperature in the foot warmer by a method wherein a lower panel, of two sheets of upper and lower panels, is attached to a groove provided in a wooden frame and the upper panel is attached to the closspiece of the wooden frame by screws while the inner surface of the upper panel is abutted against the upper part of the crosspiece. CONSTITUTION:The wooden frame 7 and the crosspieces 10 are provided with grooves 21, 22. The whole periphery of lower panel 23 is attached to the grooves 21, 22 upon incorporating it into the wooden frame. The upper panel 24 is clamped and secured to the crosspieces 9, 10 through wood screws or the like and, in this case, the inner surface of the upper panel 24 is abutted against the upper parts of the closspieces 9, 10. According to this method, a clearance between the crosspiece 10 will never be caused even when the temperature in the foot warmer is increased and the lower panel 23 is extended and, accordingly, unstabilized temperature due to sucking-in of warm-air in the foot warmer through the clearance may be prevented. |
