Image forming method

Details Image forming method Image forming method

1995-09-29

1996-11-19

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

347129, G03G 1504

Patent

active

055768105

ABSTRACT:
An electrophotographic image forming method including a toner image transfer step and eliminating an independent step for cleaning transfer residual toner is operated without causing ghost images and with good gradation and dot reproducibilities. In the method, the photosensitive member is exposed at an exposure intensity which is at least a minimum exposure intensity and below a maximum exposure intensity. The minimum exposure intensity is determined on a surface potential-exposure intensity characteristic curve of the photosensitive member by determining a first slope S1 of a straight line connecting a point giving a dark part potential Vd and a point giving a value of (Vd+ a residual potential Vr)/2, determining a contact point between a tangent line having a slope of S1/20 and the surface potential-exposure intensity characteristic curve and determining the minimum exposure intensity as an exposure intensity at the contact point. The maximum exposure intensity is determined as 5 times a half-attenuation exposure intensity.

REFERENCES:
patent: 4978597 (1990-12-01), Nakahara et al.
patent: 4999272 (1991-03-01), Tanikawa et al.
patent: 5009973 (1991-04-01), Yoshida et al.
patent: 5025272 (1991-06-01), Haneda et al.

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