Method and apparatus for copier quality monitoring and control

Details Method and apparatus for copier quality monitoring and control Method and apparatus for copier quality monitoring and control

1981-08-07

1983-03-22

Prescott, A. C.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 3DD, 118663, 118688, 118691, G03G 1500

Patent

active

043773389

ABSTRACT:
Data correlated to the light reflectance of a maximum toned area and a minimum toned area is recorded to establish standards for monitoring and controlling subsequent copier operation. A test pattern is imaged onto the photoconductor by controlled illumination levels in a series of steps with the detection of light reflectance from that test pattern being subsequently compared to establish the maximum black and maximum white criteria for storage. Light reflected from cleaned photoconductor areas and subsequently established toner patches then are used to compare against the original test pattern reflectance data. Toner replenishment, controls and machine function monitoring (e.g.: white copy background, developer operation, etc.) are based on these recorded standards from the test pattern.

REFERENCES:
patent: 3872825 (1975-03-01), Davidson
patent: 4153364 (1979-05-01), Suzuki et al.
patent: 4178095 (1979-12-01), Champion et al.
patent: 4183657 (1980-01-01), Ernst et al.
patent: 4239372 (1980-12-01), Iwai
patent: 4272182 (1981-06-01), Abe et al.
patent: 4273843 (1981-06-01), Fujita et al.
patent: 4277162 (1981-07-01), Kasahara et al.
patent: 4313671 (1982-02-01), Kuru
IBM Technical Disclosure Bulletin, vol. 22, No. 8B, Jan. 1980, (p. 3606), entitled "Copier Adjustment", by B. A. Nilsson.

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