Patent ID: 8335451
Filing Date: 2012-12-18
Classification: G03G

Abstract:
1. A developing device including a housing containing toner and having an opening at a side thereof, a developing roller supplying the toner supplied through the opening to a photoconductive drum, and a regulator contacting the outer circumference of the developing roller to regulate the amount of the toner supplied to the photoconductive drum, the housing comprising: a lower frame having side portions and a lower end portion to respectively form both edges and a lower edge of the opening in a lengthwise direction; and an upper frame welded and coupled to the lower frame and including a leading end portion to form an upper edge of the opening and a recess portion recessed from the leading end portion at both end portions of the leading end portion in the lengthwise direction, wherein both side portions of the lower frame comprise a first surface to contact the recess portion to prevent the upper frame from being pushed toward the developing roller when the upper frame is welded and coupled to the lower frame.