Electrical supply for a thermal printing head

Details Electrical supply for a thermal printing head Electrical supply for a thermal printing head

1986-08-27

1988-04-12

Shaw, Clifford C.

Recorders

Thermal recording

219216, 219482, 219483, 219485, 400120, G01D 1510, H05B 302, B41J 320

Patent

active

047378000

ABSTRACT:
Method and device to supply, from a source of alternating voltage (5a or 5b), a thermal printing head (3) comprising a number of heater units (3a, 3b).
The device comprises a means (6a to 6d) of obtaining a rectified voltage, a means (8) of detecting the points when the alternating voltage or the rectified voltage change to zero and to produce a detection signal, a means (9) of synchronizing, with this detection signal, the heating of particular heater units and a means (7a, 7b) to absorb current.

REFERENCES:
patent: 4113391 (1978-09-01), Minowa
patent: 4168421 (1979-09-01), Ito
patent: 4268838 (1981-05-01), Nakano et al.
High Speed Thermal Recording-Proceedings of the S.I.D., vol. 21, No. 2, 1980, pp. 165-160, Los Angeles, U.S., Katsuhisa Saito et al.
IBM Technical Disclosure Bulletin, vol. 22, No. 5, Oct. 1979, p. 2023, New York, U.S. Thermal Print Head Power Supply Regulator, G. M. Heiling et al.

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