Developer composition for developing an electrostatic latent image

Claim 1

A DEVELOPER COMPOSITION FOR DEVELOPING AN ELECTROSTATIC LATENT IMAGE OF SUBSTANTIALLY HOMOGENEOUS POLARITY COMPRISING RELATIVELY LARGER SUBSTANTIALLY EQUIDIMENSIONAL CARRIER PARTICLES AND GROSSLY SMALLER COLORED RESIN POWDER PARTICLES LOOSELY MOVABLE AND ELECTROSTATICALLY COATED THEREON, THE POWDER PARTICLES BEING OF A SIZE IN THE ORDER OF 0.1 TO 20 MICRONS, THE CARRIER PARTICLES BEING OF A SIZE SUCH THAT BY THEIR OWN WEIGHT THEY ARE MOVABLE AWAY FROM OPPOSITELY CHARGED POWDER PARTICLES, THE POWDER PARTICLES AND CARRIER PARTICLES BEING OF OPPOSITE TRIBOELECTRIC CHARACTERISTICS WHEREBY, BY MIXING, THE CARRIER AND POWDER PARTICLES ACQUIRE CHARGES OF OPPOSITE POLARITY, THE POWDER PARTICLES BEING TRIBOELECTRICALLY OPPOSITE, WITH RESPECT TO THE CARRIER PARTICLES, TO THE POLARITY OF THE IMAGE TO BE DEVELOPED AND THE POWDER PARTICLES BY MIXING WITH THE CARRIER PARTICLES ACQUIRING A CHARGE OF POLARITY OPPOSITE TO THE IMAGE, WHEREBY THE POWDER PARTICLES ARE ADAPTED TO BE ELECTROSTATICALLY REMOVED FROM THE CARRIER SURFACES BY AND TO THE CHARGED PORTIONS OF THE ELECTROSTATIC IMAGE AND PREFERENTIALLY ATTRACTED BY AND TO THE CARRIER SURFACES FROM THE BACKGROUND PORTIONS OF THE IMAGE.