Browse Prior Art Database

Original Publication Date: 1976-Dec-31
Included in the Prior Art Database: 2004-Mar-27

Publishing Venue

Xerox Disclosure Journal


In xerographic development systems, it is desirable to maintain a properly mixed and blended supply of devel- oper for use in the development process. For this purpose, an active crossmixer may be located in the path of denuded developer returning from the development zone and in the path of toner being added to the system. The active mixer acts to uniformly distribute the returning developer and fresh toner across the developer supply sump. The active crossmixer may comprise a plurality of flat vanes 102 mounted above a developer sump on a rotatable shaft 101 such that during rotation of the shaft opposite flat sides of the vanes are successively oriented to face the flow of developer at an angle thereto. In this manner, developer is directed alternately toward opposite sides 126, 127 of the direction of flow of incoming developer 125. Reciprocating movement of the vanes may also be employed to drive the vanes alternately between their extreme positions.