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Tangential Field Production in Electrophotographic Developers

IP.com Disclosure Number: IPCOM000041461D
Original Publication Date: 1984-Jan-01
Included in the Prior Art Database: 2005-Feb-02

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Bernardelli, WJ Brown, DL Steele, SG [+details]


This article relates to the production of tangential magnetic fields in the post-development zone of magnetic brush developers for use in an electrophotographic process. A permanent magnet is located in the post development zone to provide the necessary tangential field strength with the result that carrier bead loss is significantly reduced over previous configurations. Fig. 1 shows a rotating brush shell 10 with a develop magnet 11 positioned within rotating shell 10 relative to the photoconductor (PC) surface to provide a strong radial field at the development zone. A throw-off magnet 12 is located approximately 90o from magnet 11 so that a strong field tangential to the surface of shell 10 is present along the surface in the post-development zone. Fig.