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:
Jan. 09, 1990
Filed:
Sep. 15, 1987
Applicant:
Inventors:
Itsuo Takanashi, Kamakura, JP;
Hideshi Tanaka, Yokohama, JP;
Terumi Ohara, Yokohama, JP;
Kenichi Miyazaki, Yokohama, JP;
Toshinori Takahashi, Kawasaki, JP;
Hiroki Kitamura, Tokyo, JP;
Tadao Shinya, Yokohama, JP;
Yutaka Mizoguchi, Yokohama, JP;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ; H04N / ;
U.S. Cl.
CPC ...
358298 ; 358456 ; 346 / ; 400120 ;
Abstract
A gradation control device for a thermal ink-transfer type printing apparatus controls an applying time of a current to each of heating elements of a thermal printing head depending on a voltage drop introduced between a power source and the thermal printing head, so that it is possible to constantly print the same gradation level with the same printing dot size regardless of the printing data.