Thermal printing system

DETAILED DESCRIPTION Accordingly, an object of the present invention is to provide a thermal printing system and a thermal printing head apparatus which are easy to operate, simple in construction, error free, and capable of improving printing speed.
According to the invention, there is provided a thermal printing system comprising: main heating means including a plurality of main heating elements for printing arranged in a line on the surface of a radiating substrate; and auxiliary heating means provided near said main heating means on the surface of said radiating substrate, heated to a temperature below the dot print feasible temperature, wherein, during an operation period, said auxiliary heating element is driven to heat said main heating means at a temperature below the dot print feasible temperature, and at the time of dot printing, said main heating elements selected according to the pattern of the symbol being printed are heated to the print feasible temperature.
According to the invention, there, is further provided a thermal printing head apparatus comprising: a radiating substrate; auxiliary heating means provided on said radiating substrate and heated at a temperature below a print feasible temperature when it is operated; and main heating means including a plurality of main heating elements arranged in a line, said main heating means being disposed close to said auxiliary heating means on the surface of said radiating substrate and heated to said print feasible temperature.