Copying machine having an image density control device

Details Copying machine having an image density control device Copying machine having an image density control device

1983-11-07

1985-10-01

Grimley, A. T.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 14D, G03G 1500

Patent

active

045442630

ABSTRACT:
An image density control device for use in an electrophotographic copying machine, employs a scanning light beam having a certain spot size for scanning over a printed original to be copied. Line-width detecting circuitry operates to determine print character line widths on the original according to the output of detecting circuitry on which the light beam reflected from the original impinges. A compensation signal is generated based on the output of the line-width detecting circuitry, to provide a compensation factor based on the ratio of the scanning spot size and the detected line widths. A compensated detected density signal is then produced by compensating circuitry according to the generated compensation signal, and the copy image density is then controlled according to the compensated detected density signal.

REFERENCES:
patent: 4153364 (1979-05-01), Suzuki et al.
patent: 4239374 (1980-12-01), Tatsumi et al.

Affiliated with

Also associated with

Rating

Copying machine having an image density control device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Copying machine having an image density control device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Copying machine having an image density control device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1439268