Recorders – Thermal recording
Patent
1992-04-07
1993-06-15
Fuller, Benjamin R.
Recorders
Thermal recording
400120, 400701, 400702, 4007021, B41J 2917, B41J 239
Patent
active
052203557
ABSTRACT:
A resistive sheet thermal transfer printer includes a plurality of recording electrodes in in contact with a resistance layer of a current sensitized ink sheet, a common electrode in contact with the resistance layer of the current sensitized ink sheet, and a power supply for applying a voltage across the common electrode and each of the recording electrodes in accordance with image data. The resistive sheet thermal transfer printer also includes, a detection circuit for detecting an electrical current passing through each of the recording electrodes when a predetermined voltage is supplied to each of the recording electrodes, a control circuit for determining, based on a detected electric current obtained by the detection circuit, whether or not a deposit has accumulated on at least one of the recording electrodes, and an abrasive mechanism for abrading ends of the recording electrodes when the control circuit determines that the deposit has accumulated on at least one of the recording electrodes.
REFERENCES:
patent: 4624593 (1986-11-01), Humphries et al.
patent: 4684960 (1987-08-01), Nishiwaki
patent: 5079566 (1992-01-01), Mori
Bowlds et al., "Automatic Printhead Cleaner", IBM Bulletin, vol. 26, No. 3B, Aug. 1983, pp. 1586-1587.
Fuller Benjamin R.
Ricoh & Company, Ltd.
Tran Huan
LandOfFree
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