Thermal recording apparatus for recording and erasing an image o

Details Thermal recording apparatus for recording and erasing an image o Thermal recording apparatus for recording and erasing an image o

1993-08-24

1995-06-13

Tran, Huan H.

Incremental printing of symbolic information

Thermal marking apparatus or processes

With correction or erasing means

3461351, 359 43, 359 44, B41M 526, B41M 528, B41J 2315, B41J 2325

Patent

active

054247640

ABSTRACT:
A printing system for recording and erasing a visible image on/from a recording medium being changed between transparent and non-transparent states depending on a heating temperature. A thermal recording device which includes a section for electrically energizing a heating element using a driving pulse train is used to head the recording medium, thereby changing its state. The first driving pulse train has a plurality of pulses of a first duty factor in one dot formation period for recording each non-transparent dot on the recording medium. A second driving pulse train for electrically energizing the heating elements has pulses of a second duty factor which are different from the first duty factor, the number of second pulses being substantially the same as that of the first driving pulse train in order to record the transparent dot on the recording medium or to erase the non-transparent dot from the recording medium.

REFERENCES:
patent: 4695528 (1987-09-01), Dabisch et al.
patent: 4965591 (1990-10-01), Kurabayashi et al.
Hotta, Y., et al, "Reversible Thermosensitive Material and Printing Characteristics", Proceedings of 4th Japanese Symposium on Non-impact Printing Technologies Symposium, 3-2, pp. 57-60 (1987).
Hino, Y., et al, "Rewritable Leuco-thermal Recording Medium", Japan Hardcopy '90, The Annual Conference of Japan Hardcopy for the Society of Electrophotography of Japan, NIP-2, pp. 147-150.

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