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US 4,539,571 AGranted
Thermal printing system
AssigneeTokyo Shibaura Denki Kabushiki Kaisha
InventorKuniaki Suzuki
Life of this patent
Estimating the term…
Abstract
Disclosed is a thermal printing system in which, an auxiliary heating means is driven to heat a main heating means for dot printing to a print feasible temperature, and at the time of dot printing, the main heating means is heated to the said print feasible temperature. The main heating means and the auxiliary heating means are both disposed on the surface of a radiating substrate. The thermal head apparatus is thus simple in construction and capable of improving printing speed.
Claims9
A thermal printing head apparatus comprising:
- a radiating substrate;
- a plurality of main heating elements arranged in a line, provided on a surface of said radiating substrate;
- an auxiliary heating element mounted on a surface of said radiating substrate near said main housing means;
- and
- controllable driving means for driving said auxiliary heating means to heat said main heating elements to a temperature below a dot print feasible temperature, and for independently driving selected ones of said main heating elements to said dot feasible temperature so as to print a given pattern.
2 more elements
Dependencies are inferred from the claim text.