Patent ID: 7546069
Filing Date: 2009-06-09
Classification: G03G

Abstract:
1. A development subsystem for an electrostatographic printing machine, comprising: a developer housing, for retaining a quantity of developer having semiconductive carrier particles and toner particles; a first magnetic roll having a stationary core with at least one magnet and a sleeve having longitudinal grooves that rotates about the stationary core of the first magnetic roll, the longitudinal grooves on the first magnetic roll being separated from one another by a distance of approximately 1.2 mm to approximately 1.4 mm; a second magnetic roll having a stationary core with at least one magnet and a sleeve having longitudinal grooves that rotates about the stationary core of the second magnetic roll, the longitudinal grooves on the second magnetic roll being separated from one another by a distance of approximately 1.2 mm to approximately 1.4 mm; a motor coupled to the first and the second magnetic rolls to drive the rotating sleeves of the first and the second magnetic rolls in a direction that is against the direction of a photoreceptor that rotates in proximity to the first and the second magnetic rolls and the first and the second magnetic rolls carry semiconductive carrier particles and toner particles through a development zone formed by the first and the second magnetic rolls; and a trim blade mounted proximate one of the first or the second magnetic rolls to form a trim gap of approximately 0.5 to 0.7 mm.