Photocopying – Contact printing – Light boxes
Patent
1992-10-15
1994-05-10
Smith, Matthew S.
Photocopying
Contact printing
Light boxes
355203, 355204, 355208, 118689, G03G 2100
Patent
active
053112610
ABSTRACT:
This invention relates to a toner density control method for an image recording apparatus including the steps of: obtaining, as a sensitivity of a toner density sensor, a change amount in output voltage of the sensor with respect to that in control voltage for controlling a strength of the magnetic field generated by the sensor; calculating a ratio of the sensitivity of the sensor to that of a standard toner density sensor, thus obtaining a correction value; discriminating which one of plurality of ranges bounded in accordance with operational results of a value of the output voltage of the standard toner density sensor and the correction value of the output voltage of the sensor belongs to, and changing a replenishing amount of the toner on the basis of a discrimination result, and relates to an apparatus for practicing the method.
REFERENCES:
patent: 4916488 (1990-04-01), Kimura
patent: 4932356 (1990-06-01), Watanabe et al.
patent: 4999676 (1991-03-01), Mouri
patent: 5091749 (1992-02-01), Iida et al.
patent: 5107301 (1992-04-01), Yamauchi
patent: 5162849 (1992-11-01), Yoshino et al.
patent: 5164775 (1992-11-01), Miller et al.
Nakagama Kiyohari
Nemoto Mitsugu
Watanabe Satoshi
Bierman Jordan B.
Konica Corporation
Smith Matthew S.
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