| 摘要 |
PROBLEM TO BE SOLVED: To provide an air filter which can be manufactured in a comparatively easy way. SOLUTION: An air filter 10 includes a sealing material 12 filled in one part of a filter medium 11. In the air filter 10, the sealing material 12 is not filled in the center part 21 of the filter medium 11, so that it becomes a circular ventilation part for air to be ventilated. On the other hand, the outside part 22 of the filter medium 11 is filled with the sealing material 12, embedded by the sealing material 12, so that it becomes a non-ventilation part where no air passes through. The sealing material 12 of the outside part 22 of the filter medium 11 is filled by centrifugal force. COPYRIGHT: (C)2012,JPO&INPIT |
