The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 07, 2002
Filed:
Dec. 08, 1999
Shigeo Izumi, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A thermal printer is provided in which unevenness of printing due to temperature changes of a power source, can be prevented from occurring as well as prevented useless power consumption with a simple configuration. The temperature of a cell is measured with a cell temperature measuring section, and by referring to a table showing a relationship between the temperature and the internal resistance of the cell, which is stored in ROM, corresponding resistance is acquired. An energizing pulse width for energizing each heater element of a thermal head is calculated while the above-mentioned resistance is taking into consideration, to thereby energize and drive the above each heater element.