Developer module with electromagnetic shutter

Details Developer module with electromagnetic shutter Developer module with electromagnetic shutter

1995-05-26

1996-10-08

Ramirez, Nestor R.

Photocopying

Contact printing

Light boxes

118657, G03G 1506

Patent

active

055636896

ABSTRACT:
An electromagnetic shutter (40) is comprised of two poles, a south pole (42) and a north pole (44) that are disposed above the surface of a delivery roller element (32). The delivery roller element (32) rotates about a fixed magnet (30) that has various poles. The south pole (42) of the electromagnetic shutter (40) is aligned proximate to the one of the north poles of the magnet (30). When the electromagnetic shutter (40) is activated with the windings (48) and (50) or winding (48) only, the shutter will form a magnetic dam (79) of toner particles which will effectively prevent passage of the toner particles thereby.

REFERENCES:
patent: 4391512 (1983-07-01), Nakamura et al.
patent: 4428661 (1984-01-01), Masuda et al.
patent: 4431298 (1984-02-01), Arai et al.
patent: 4637706 (1987-01-01), Hosoi et al.
patent: 4746952 (1988-05-01), Kusuda et al.
patent: 5072690 (1991-12-01), Ishikawa et al.

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