Patent ID: 8737875

Claim:
A system for moving a cartridge between engaged and disengaged positions with a developer unit in an image forming device, comprising: a bias control arm including an elongated shape along a centerline, the centerline oriented in a first direction, wherein the bias control arm is positioned in proximity to the cartridge and is linearly movable between first and second positions along the first direction; and a positioning surface located on a first side of the bias control arm and at an angular orientation to the centerline such that the positioning surface exerts a force on the cartridge generally perpendicular to the first direction when the bias control arm is in the second position thereby forming a nip between a developer member of the cartridge and a photoconductive member of the developer unit; wherein the cartridge is in the disengaged position spaced away from the developer unit when the bias control arm is in the first position, and the cartridge is in the engaged position with the developer unit when the bias control arm is in the second position.