Magnet system for an image-forming apparatus

Details Magnet system for an image-forming apparatus Magnet system for an image-forming apparatus

1996-11-07

1998-09-22

Braun, Fred L.

Electrophotography

Image formation

Development

399277, G03G 1509

Patent

active

058129219

ABSTRACT:
A magnet system for an image-forming apparatus comprising an image-forming element which is capable of electrically and/or magnetically attracting a toner powder and is movable relative to the magnet system. The magnet system includes a support at least one ferromagnetic body and a clamping device. The support is surrounded by a rotatable sleeve and arranged such that the circumferential surface of the sleeve faces the surface of the image-forming element in a linear image-forming zone extending normal to the direction of movement of the image forming element. The at least one ferromagnetic body has magnets fixed in the support and defines a localized magnetic field in the image-forming zone. The clamping device will engage the ferromagnetic body to secure the body in the support in a non-positive manner, thereby allowing differential thermal expansion of the magnets and the support.

REFERENCES:
patent: 3639051 (1972-02-01), Charlap et al.
patent: 3894513 (1975-07-01), Stanley et al.
patent: 4459345 (1984-07-01), Probst
patent: 5247317 (1993-09-01), Corver et al.
patent: 5319334 (1994-06-01), Klerken
patent: 5529628 (1996-06-01), Fuchiwaki et al.

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