Heating control device for a thermal ink-transfer type printing

Details Heating control device for a thermal ink-transfer type printing Heating control device for a thermal ink-transfer type printing

1983-03-10

1985-08-20

Goldberg, E. A.

Recorders

Thermal recording

219216, G01D 1510

Patent

active

045367710

ABSTRACT:
A heating control for a thermal printing head having a plurality of head elements for heating a transfer sheet adhered with a kind of ink which melts due to heat and transferring melted ink onto a recording sheet which makes contact with the transfer sheet to print images such as characters and figures, the control having a converting circuit for sampling an input analog signal indicating tone or density of an image to be printed on the recording sheet according to the number of the head elements, and converting the input analog signal into a digital signal, a memory for storing the output converted digital signal of the converting circuit and reading out the stored digital signal from addresses corresponding to each of the head elements, and a control circuit for obtaining signals of addresses which are not adjacent to each other from among the signals of the addresses corresponding to the head elements thus read out from the memory and applying current to the head elements corresponding to the addresses of the signals obtained to heat the respective head elements, and then obtaining signals of addresses which are not adjacent to each other from among the signals of the addresses corresponding to the head elements thus read out from the memory excluding the signals of addresses already obtained and applying current to the head elements corresponding to the addresses of the signals this time obtained to heat the respective head elements.

REFERENCES:
patent: 3984844 (1976-10-01), Tanno et al.
patent: 4409597 (1983-10-01), Nakamura et al.
patent: 4425568 (1984-01-01), Morigachi et al.

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