Developing system e.g. for electrophotographic printer, copier, has dividing plate regulating quantity of developing substance near inversion point formed by opposing north, south poles

摘要

The developing system has developing rollers (1,2) that rotationally feed developing substances (4a,4b) to an image medium (101) that rotates on a predefined track with a latent image. Each developing roller contains stationary magnetic energy sources (20a,20b). At least one pair of magnetic energy sources has opposing north and south poles (N1,S1,..) forming a polarity inversion point (E1,E2) on the roller surface. The inversion points are placed opposite each other on the roller surfaces. A dividing plate (3) regulates the quantity of developing substance near the inversion point. A specific roller, inversion point and plate geometry is set up.