Incremental printing of symbolic information – Thermal marking apparatus or processes – With transfer medium or driving means therefor
Patent
1995-06-05
1998-05-12
Fuller, Benjamin R.
Incremental printing of symbolic information
Thermal marking apparatus or processes
With transfer medium or driving means therefor
B41J 1728, B41J 1730, B41J 2325, B41J 3314
Patent
active
057513317
ABSTRACT:
The invention provides an ink sheet transfer control apparatus which can transfer an ink sheet stably without requiring any complex structure. A CPU drives and controls a grid motor so that recording paper can be transferred at a constant speed with the ink sheet and the recording paper pressed in contact with each other by a thermal head and a platen. Then, the CPU drives an ink motor with an arbitrarily determined voltage Vi, and measures a current Ig then flowing through the grid motor. The CPU determines such an optimum drive voltage Vir of the ink motor that a specified tension is developed to the ink sheet in printing operation, based on the measured current Ig, and drives the ink motor with the optimum drive voltage Vir. Characteristics of print drive system are detected by measuring the current Ig flowing through the grid motor, so that the print drive system can be controlled with simple construction.
REFERENCES:
patent: 5370470 (1994-12-01), Kim
Hanato Hiroyuki
Higuchi Kaoru
Ishii Hiroshi
Anderson L.
Fuller Benjamin R.
Sharp Kabushiki Kaisha
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