Developer rolls system with reduced edge image defects

Details Developer rolls system with reduced edge image defects Developer rolls system with reduced edge image defects

1998-08-03

1999-07-27

Smith, Matthew S.

Electrophotography

Image formation

Development

399277, G03G 1509

Patent

active

059305690

ABSTRACT:
An image development system for developing a latent image on an imaging surface, such as a xerographic photoreceptor, with plural development rollers having internal axially extending developer magnets with relatively offset axial end positions, and wherein at least one development roller has a smooth surface area at that same end, to reduce edge banding image defects from the interaction of the axial ends of the magnets of adjacent development rollers, especially for large size copy sheets being printed, such as B4 size. The image developer unit may have three development rollers with three different lengths of developer magnets to provide three different magnetic end positions staggered on opposite sides of the end position of the large sheet (relative to the imaging surface).

REFERENCES:
patent: 3572289 (1971-03-01), Maksymiak
patent: 4246867 (1981-01-01), Hudson

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