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EP0255116A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Thermal print head printing control apparatus

Assignee: Sato Corp
•
Filing: 1987-07-28
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Granted: —
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Expires: 2007-07-28
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Abstract

Abstract A thermal print head printing control apparatus monitors the thermal print head temperature and the power supply voltage, looks up an optimum printing time in a time constants table corresponding to the relationship between the temperature and the voltage and printing is performed in accordance with this printing time. This arrangement prevents the printing from becoming too dark as a result of the thermal print head heating up after extended periods of continuous use, and it also stops blurring; also, when the temperature drops the print does not become lighter. Therefore, a constant print density is maintained, providing best quality printing.

Inventors

  • 👤 Shinsuke Murata

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-01 05:56
CPC Classifications
G; G06; G06K; G06K15/00; B; B41; B41J; B41J2/00; B41J2/315; B41J2/32; B41J2/35; B41J2/355; B41J2/36; B41J2/365

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 152 words
A thermal print head printing control apparatus which has a temperature detecting means for detecting the temperature of a thermal print head which employs heat to print on a print medium; power supply voltage detecting means for detecting at least the output voltage of a power supply that applies a voltage to the thermal print head for the said heating; and a time constants table which indicates a printing time corresponding to said thermal print head temperature and power supply output voltage; said time constants table being provided in a memory storage means of a printer control portion which controls the thermal print head and the transport of the said print medium; whereby in the printing of the said print medium, the said printer control portion controls the printing so that printing is performed in accordance with a printing time based on the said thermal print head temperature and power supply voltage.

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