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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.:

US 3931492 B1

PDFFull Text
Date of Patent:
Jan. 06, 1976

Filed:

Jun. 07, 1973

Thermal print head

Applicant:
Inventors:

Rikuo Takano, Musashino, JA;

Mitsushi Matsunaga, Tokorozawa, JA;

Akira Yoshida, Tokyo, JA;

Kiyoshi Nawata, Kawasaki, JA;

Shigehisa Nakaya, Kodaira, JA;

Assignee:

Nippon Telegraph and Telephone Public Corporation, Tokyo, JA;

Attorney:

Pfund, Esq.; Charles E.

Primary Examiner:

G Harris

Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
219216 ; 219543 ; 357 15 ;
Abstract

The thermal print head comprises a substrate, a semiconductor wafer fabricated thereover, a plurality of junctions formed on the semiconductor wafer, and electrodes to supply an inverse current to the junctions. The junctions are arranged so as to correspond to the pattern of the symbol, such as letters, to be printed. Each of the junctions is used as a heating element. Heat is evolved at the junction when the inverse current flows through the potential barrier which is formed at the junction. The heat evolved is used for the heating element.

Find Patent Forward Citations

Takano, Rikuo. (1976). Thermal print head (U.S. Patent No. 3931492). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3931492

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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