| 摘要 |
PURPOSE: To enable performing the manufacture of a close filter inserting body easily, at a low cost, and surely. CONSTITUTION: First, a filter material web 1 is folded in order to prepare pleating. Next, the folded filter material web 1 is pleated according to the folding. In this case, to at least two toothed belts 2 arranged above and below the filter material web 1 and extending along the filter material web 1 and provided leaving a space from each other, the filter material web is introduced to fix it. |
