| 摘要 |
<p>PROBLEM TO BE SOLVED: To secure airtightness of a filter paper by providing a belt-like non-permeable filter paper fitting base material having a plurality of openings, and a filter paper fitted in such a manner as to close the respective openings and produce an exposed part of the filter paper fitting base material between the openings. SOLUTION: A rubber sheet 2 as a filter paper fitting base material is belt-like, 4mm thick, and provided with opening parts at designated intervals. The opening parts are formed by circular through holes and circular non-through holes which are coaxial with the above holes and have a larger diameter. A filter paper 1 having a diameter larger than that of the through hole and smaller than that of the non- through hole is made adhere to the upper surface of the non-through hole of each opening part. A sampler container 34 clamps a part of the sheet 2, not a part of the filter paper 1 of the filter paper 51 for a dust sampler. The size of the opening part of the sheet 2 is adjusted in such a manner that the container 34 does not clamp a part of the filter paper 1. Leakage between a filter paper presser 15 and a detector container 13, that is, air leak in the direction of thickness of filter paper is prevented by clamping the sheet 2 to keep the airtightness of the container 34. That is, the sheet 2 functions as a packing and an airtight seal.</p> |
