Patent ID: 7406279

Claim:
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 that rotates about the stationary core of the first magnetic roll; a second magnetic roll having a stationary core with at least one magnet and a sleeve that rotates about the stationary core of the second magnetic roll, the first and the second magnetic rolls being arranged in the developer housing to form a development zone in which the first magnetic roll presents developer to a photoreceptor surface before any other magnetic roll in the developer housing presents developer to the photoreceptor surface as the photoreceptor surface passes in a direction through the development zone; and a motor coupled to the first and the second magnetic rolls to drive the sleeve of the first magnetic roll at a velocity that is greater than a velocity at which the second magnetic roll is driven, the first and second magnetic rolls being driven in a direction that is with the direction the photoreceptor surface passes through the development zone.