Patent ID: 7796900
Filing Date: 2010-09-14
Classification: G03G

Abstract:
1. A method of operating an electrostatographic printer, the printer including a development unit, the development unit having a development housing for supplying developer to an image receptor, and a replenisher in communication with the development housing, the method comprising: in a basic state, supplying a regular supply of developer to the development housing, the regular supply of developer having an about 3:1 ratio of toner to carrier by weight and having a first predetermined TC (where the TC is a measurable and/or controllable value derived at least in part from the relative amounts of toner and carrier in the developer); in a special state, supplying a special supply of developer to the development housing, the special supply of developer having an about 5:7 ratio of toner to carrier by weight and having a second predetermined TC; determining whether the printer should be in the special state based on the quality of developer in the development housing; and in response to determining the printer should be in the special state, requesting the special supply of developer be installed in the printer to improve the quality of the developer in the development housing.