Toner image density detecting mechanism for image forming appara

Details Toner image density detecting mechanism for image forming appara Toner image density detecting mechanism for image forming appara

1992-02-21

1993-10-12

Grimley, A. T.

Photocopying

Contact printing

Light boxes

118688, 118689, 118690, 118691, 355203, 355204, 355208, G03G 2100

Patent

active

052530183

ABSTRACT:
The present invention relates to a toner image density detecting mechanism for an image forming apparatus which includes an image bearing layer supported on a rotatable cylindrical member, a device for forming a plurality of toner reference patterns on the image bearing layer at respective positions which equally divide a circumference of the cylindrical member, a detector for detecting an image density of the toner image of the reference pattern, and a controller controlling an image forming condition in accordance with an output of the detector; wherein an average of the image densities is determined for use in a control operation of the controller. Preferably, the toner used has a reflective or absorbing rate not less than 1.5 times that of the image bearing layer.

REFERENCES:
patent: 4575224 (1986-03-01), Arnold
patent: 4883019 (1989-11-01), Menjo et al.
patent: 4894685 (1990-01-01), Shoji
patent: 5045883 (1991-09-01), Ishigaki et al.
patent: 5103260 (1992-04-01), Tompkins et al.

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