| 摘要 |
PROBLEM TO BE SOLVED: To adjust the outside dimension in accordance with the dimension of the mounting port of the filter device, to eliminate the need for the production of many kinds of the filter devices, to obviate the breakage of the filter even when the outside dimension is adjusted. In accordance with the dimension of the mounting port of the filter device and to renew only the filter contaminated with smoke black. SOLUTION: This device consists of a frame B and an filter A exchangeably attached to the frame B. The frame B is provided with its main body, a member for holding the filter A by the main body and an outside dimension control member 9 displaceably fixed to the main body. The filter is formed from metallic fiber and has a thin part with the small clearance between the fibers and a thick part 1 with the large clearance. |
