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:
Nov. 15, 1983
Filed:
Nov. 05, 1981
Noboru Suemori, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a thermal printing head for use in a facsimile printer or the like, unevenness of printing consistency occurs which is due to temperature variation of the thermal resistor elements and due to the difference in printing data resulting from black record information or white record information of the printing data for the preceding line. A printing pulse control circuit for the thermal printing head stores the information for the preceding line, and applies a printing pulse of smaller pulse width to the thermal resistor elements heated by the black record information for the preceding line and a printing pulse of larger pulse width to the thermal resistor elements not heated with white record information for the preceding line to make uniform black printing consistency for the present line irrespective of the type of printing data for the preceding line.