| 摘要 |
<p>The present invention relates to a dust filter assembly attachable to office machines such as printers and copiers that employs toner, and computers and fax machines that require cooling. The dust filter assembly includes a contact plate attached to a vent hole of an office machine and sealing the periphery of the vent hole, a filter case connected to the contact plate and having a filter accommodation space, and a filter disposed in the filter case and including a plurality of layers, at least one of which is charged with static electricity.</p> |
