Development apparatus

Details Development apparatus Development apparatus

1996-11-13

1998-05-19

Smith, Matthew S.

Electrophotography

Image formation

Development

399272, 399274, G03G 1509

Patent

active

057549290

ABSTRACT:
A development apparatus having a development sleeve for carrying and transporting a magnetic developer, a regulating roll for controlling the thickness of a layer of the developer on the development sleeve, a first magnetic pole provided in the development sleeve in the vicinity of a position of layer thickness control by the regulating roll, a second magnetic pole provided in the regulating roll to form a magnetic field for restraining the developer in cooperation with the first magnetic pole. The first and second magnetic poles are provided on the upstream side of a straight line connecting a center of the development sleeve and a center of the regulating roll in the direction of transport of the developer by the development sleeve so that the following inequalities are satisfied:

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patent: 5517286 (1996-05-01), Tada et al.
patent: 5523533 (1996-06-01), Itoh et al.

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