Thermal recorder with ink sheet tension

Details Thermal recorder with ink sheet tension Thermal recorder with ink sheet tension

1989-03-10

1990-11-27

Reinhart, Mark J.

Recorders

Record receiver deforming

346139R, G01D 1510, B41J 2325

Patent

active

049739859

ABSTRACT:
A thermal transfer recording apparatus, such as a thermal transfer printer, which winds up at constant speed an ink sheet having ink to be transferred while applying a constant tension to the ink sheet by a DC motor through a speed reduction mechanism, so that the respective rotation speed and torques, when a wind-up roll is of a minimum diameter or a maximum diameter, are computed from the feed speed and tension of the ink sheet to thereby obtain a desired gradient in a chart of the relationship between the torque and the rotation speed of the DC motor, the gradient deciding a reduction ratio of the deceleration mechanism and the driviing voltage of the DC motor being decided. Hence, even though the wind-up roll varies in an external form, variation in tension applied to the ink sheet and that in the feed speed can be restricted.

REFERENCES:
patent: 4755833 (1988-07-01), Tanigawa et al.

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