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:
Aug. 16, 1994
Filed:
Mar. 15, 1991
Applicant:
Inventors:
Shinji Nureki, Tokyo, JP;
Kazuhisa Oonishi, Tokyo, JP;
Assignee:
Seiko Instruments Inc., , JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
346 / ;
Abstract
This invention is directed to provide a line thermal printer which controls a power supply quantity to a thermal head by high speed control below a second unit and can insure always a predetermined printing density. The line thermal printer includes circuit elements for multiplying a heat accumulation counter for counting cumulatively the number of dot data for each line by a heat radiation constant in a predetermined cycle and for controlling a power supply pulse width on the basis of the count value of the heat accumulation counter.