| 摘要 |
An air filter (30, 50, 60) for removing smoke and toner dust from air in an electrophotographic/electrostatic recording apparatus, the air filter comprising: a first filter unit (31, 51, 61) disposed at the air inlet side of the air filter, and at least a second filter unit (32, 52, 62) disposed at the outlet side of said first filter unit; the first filter unit (31, 51, 61) comprising electrostatically charged fibrous material having a characteristic of attracting charged toner particles, the first filter unit having a specified opening size approximately equal to or larger than average toner size; and the second filter unit (32, 52, 62) being made of fibrous material without an electrostatic charge, and having an opening size smaller than that of the first filter unit. |
