Patent ID: 8626030
Filing Date: 2014-01-07
Classification: G03G

Abstract:
1. A charging device comprising: a shield case having an opening; a discharge electrode disposed in an interior space of the shield case, having a plurality of projections aligned in one direction from which a stream of ions is generated, the plurality of projections each being so disposed that a width direction thereof makes a predetermined angle with a direction of arrangement of the plurality of projections, in order that streams of ions generated from the projections that are adjacent to each other in a lengthwise direction of the shield case can overlap each other when viewed in a widthwise direction of the shield case, the plurality of projections all being arranged substantially parallel to one another; and wherein the discharge electrode is so constituted that a condition of p<W/{2 tan(α)}+W/{2 tan(β)} is fulfilled, wherein W denotes a width of the shield case, α and β denote predetermined angles of given two projections arranged adjacent to each other in a lengthwise direction of the shield case are, respectively, and p denotes a pitch of tip ends of the two projections.