Patent ID: 7251443
Filing Date: 2007-07-31
Classification: G03G

Abstract:
1. A laser printer comprising: a columnar photoreceptor drum; a transfer roller formed in a column and arranged to linearly contact said photoreceptor drum; a transfer roller frame covering said transfer roller and holding a rotation shaft of said transfer roller; a metallic outer frame having said transfer roller frame pivotably fixed thereto; a metallic spring formed to bias said transfer roller frame toward said photoreceptor drum; and a diselectrification brush arranged on an external surface of said transfer roller frame, wherein said spring is formed of a single elongate member, and includes: wherein said first extension has a portion bent to be flat, as seen in a plane, along a surface of said diselectrification brush and is formed to be biased toward a surface of said diselectrification brush; and wherein said second extension has a portion bent to be flat, as seen in a plane, along a surface of said outer frame and is formed to be biased toward a surface of said outer frame.