Patent ID: 9188890
Filing Date: 2015-11-17
Classification: G03G

Abstract:
1. A method for controlling the triboelectric charge potential of a developer in a developer housing comprising: (a) providing a developer comprising toner particles and first carrier particles; (b) using the developer to develop electrostatic latent images; (c) determining a desired triboelectric charge potential of the developer (d) subsequent to step (b), determining the actual triboelectric charge of the developer; and (e) subsequent to step (d), adding to the developer a mixture of second carrier particles and third carrier particles, wherein the second carrier particles are fed from a first carrier sump and the third carrier particles are fed from a second carrier SUMP and further wherein the triboelectric charge on the second carrier particles being different from that on the third carrier particles, in amounts sufficient to adjust the actual triboelectric charge potential of the developer to a value closer to the desired triboelectric charge potential of the developer.