NECK DOWN FLOW FORM MAG BRUSH ROLL & CORE
Original Publication Date: 1981-Feb-28
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
An economical magnetic brush developer roll assembly is provided with at least one integral roll and roll shaft. Previous such rolls comprised an inner stationary magnet around a core with core stub shaft mounted at each end. Also mounted to the stub shafts were end caps with suitable housing at each end which were press fitted into supporting engagement with the outer roll. The present device provides both an inner core and an outer tube made by flow forming the material into an integral roll and roll shaft configuration. As seen from the figure, the developer roll assembly comprises a central stationary core 10 made of a material such that one end may be necked down to form mounting shaft 12. The other end of the core is supported by a shaft 14 mounted in bearing 16. Fixedly supported by the core 10 is magnetic shell 18 outside of which is a second tube 22 made of a material such that an end can be formed by neck down flow forming into shaft 30. The tube 22 is supported by an end cap 26 mounted on bearing 28 at its left end and is rotatably driven by necked down shaft 30.