Photocopying – Contact printing – Light boxes
Patent
1992-04-17
1993-04-20
Grimley, A. T.
Photocopying
Contact printing
Light boxes
355208, 395 3, 395 22, G03G 2100
Patent
active
052047180
ABSTRACT:
An electrophotographic process control device for controlling the supply of a toner in such a manner as to stabilize images against changes in the characteristics of a photoconductive element and in the concentration of the toner. An image density sensor measures the density of an image formed on a photoconductive drum. A scanner writes read image data representative of a document on the photoconductive drum. A determining section is responsive to the image density from the image density sensor and write image data from the scanner and representative of the area of an image for executing a predetermined fuzzy combination operation by using fuzzy rules registered beforehand and converts a membership function resulted from the operation to a non-fuzzy value to thereby determine a toner supply manipulation value.
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Grimley A. T.
Horgan Christopher
Ricoh & Company, Ltd.
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