IMPROVED DEVELOPER HOUSING FOR AN ELECTROPHOTOGRAPHIC COLOR COPIER
Original Publication Date: 1983-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
A filter is placed in a wall of each developer housing in an electrophotographic color copier such as one using magnetic brush development. A vacuum source is connected by a conduit to each filter so that a negative pressure is applied inside the developer housings. This, in turn, causes the powder cloud formed at the development zones between the magnetic brushes and photoconductive imaging member to be pulled back into the respective housings. Therefore, the powder cloud is contained inside the developer housing, reducing contamination within the copier, and assisting in background reduction in the copies produced by the color copier. To prevent excessive flow of toner from the repIenishment toner cartridges into the developer housing, seals are added to the cartridges to reduce the flow from them.