| 摘要 |
<p>PROBLEM TO BE SOLVED: To set the topside suction louvers provided in a topside suction port, such that they are in half open condition always at substantially the same angles, and that each angle becomes substantially the same. SOLUTION: Step-from engaging pieces 21, 22, and 23 are provided at the top face of a slide lever 20, which is provided freely of backward and forward sliding within a front panel 3, and firs step-form parts 21a, 22a, and 23a and second step parts 21b, 22b, and 23b are made at the step-form engaging pieces 21, 22, and 23, and the arms 16a, 17b, and 18b of the top face suction louvers 16 and 17 and 18 run upon the top faces of the above first step parts 21a, 22a and 23a, whereby this top face suction louvers 16, 17, and 18 becomes half-open.</p> |
