Typewriting machines – Typing by other than type-face or type-die – Thermal
Patent
1995-02-10
1997-09-09
Hilten, John S.
Typewriting machines
Typing by other than type-face or type-die
Thermal
347189, B41J 2365
Patent
active
056648936
ABSTRACT:
A thermal sublimation printer comprises means for counting at periodic observation times the number (N.sub.h) of activated heating elements; means for measuring at periodic observation times the temperature (T.sub.d) of the drum and the temperature (T.sub.h) of the heatsink; means for digitising the measured temperature of the drum and the measured temperature of the heatsink; means for transferring the number of activated heating elements and the digitised temperature values T.sub.d and T.sub.h ; a device for estimating the temperature (T.sub.e) of the heating elements based on the values of N.sub.h, T.sub.d and T.sub.h ; memory means for storing the estimate of the temperature of the heating elements; the printer operating to adjust the applied energy as a function of the estimate of the temperature of the heating elements and of the required temperature of the heating elements.
REFERENCES:
patent: 3577137 (1971-05-01), Brennan et al.
patent: 4391535 (1983-07-01), Palmer
patent: 4724336 (1988-02-01), Ichikawa et al.
patent: 4912486 (1990-03-01), Yumino
patent: 5066961 (1991-11-01), Yamashita
patent: 5539443 (1996-07-01), Mushika et al.
Kaerts Eric
Meeussen Dirk
AGFA-GEVAERT N.V.
Hilten John S.
Kelley Steven S.
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