Chemical heat amplification in thermal transfer printing

Details Chemical heat amplification in thermal transfer printing Chemical heat amplification in thermal transfer printing

1984-02-23

1985-06-25

Hartary, Joseph W.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346 76L, 346 76PH, 400118, 400120, 4002411, 428913, 428914, 430945, B41J 3102, G01D 1510

Patent

active

045257221

ABSTRACT:
Chemical heat amplification is provided in thermal transfer printing, wherein some of the heat necessary for melting and transferring ink from a solid fusible layer in a ribbon to a receiving medium is provided by an exothermic reaction. This chemical reaction is due to an exothermic material that is located in the ink layer, or in another layer of the ink bearing ribbon. The exothermic reaction reduces the amount of the input power which must be applied either electrically or with electromagnetic waves. Examples of suitable exothermic materials are those which will provide heat within the operative temperature range of the ink, and specifically hydrazone derivatives which are substantially colorless, and have a molecular weight in the approximate range 150-650.

REFERENCES:
patent: 3615533 (1971-10-01), Rauner
patent: 3787210 (1974-01-01), Roberts
patent: 4491432 (1985-01-01), Aviram
Bruce et al.; Exothermic Laser Transfer Printing; IBM Tech. Disc. Bulletin, vol. 18, No. 12, May 1976, p. 4142.

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