Electrophotography – Internal machine environment – Forced air circulation
Patent
1999-11-02
2000-08-29
Grimley, Arthur T.
Electrophotography
Internal machine environment
Forced air circulation
G03G 2120
Patent
active
061120405
ABSTRACT:
An ozone-exhaust duct is incorporated in an electrophotographic printer to exhaust air, containing ozone and dust articles, and an exit structure of the duct is associated with an ozone-filter. In the exit-structure, a dust trapper is provided under an exit end portion of the duct near the ozone-filter to define a dust-trapping chamber such that a cross-sectional area of the exit end portion of the duct is increased in comparison with a cross-sectional area of a remaining portion of the duct, whereby a velocity of the air, introduced from the remaining portion of the duct into the exit end portion thereof, slows down, due to the existence of the ozone-filter and the increased cross-sectional area of the exit end portion of the duct, resulting in trapping of a part of the dust particles, contained in the introduced air, in the dust-trapping chamber of the dust trapper due to gravity.
REFERENCES:
patent: 5028959 (1991-07-01), Gooray
patent: 5068684 (1991-11-01), Abe et al.
patent: 5087943 (1992-02-01), Creveling
patent: 5155531 (1992-10-01), Kurotori et al.
patent: 5946528 (1999-08-01), Cho
Saito Hiroyuki
Yamamoto Kasumi
Asahi Kogaku Kogyo Kabushiki Kaisha
Forde Remmon R.
Grimley Arthur T.
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