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. 10, 1988
Filed:
Dec. 15, 1986
Yasuo Nishiguchi, Kokubu, JP;
Tsuyoshi Yasutomi, Kokubu, JP;
Ryoichi Shiraishi, Kagoshima, JP;
Akira Sasaki, Hitachi, JP;
Yoshihito Takahashi, Hitachi, JP;
Katsumasa Mikami, Naka, JP;
Masafumi Suzaki, Hitachi, JP;
Akiyoshi Hakoyama, Hitachi, JP;
Kyocera Corporation, Kyoto, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A thin film type thermal head includes a head substrate member, a partial projected glaze portion mounted on the head substrate member, a plurality of heating resistor elements provided on the partial projected glaze portion with each of the heating resistor elements having a uniform thin thickness and two electrode end portions. A common electrode is provided on the partial projected glaze portion and an individual control electrode is also provided on the partial projected glaze portion. The partial projected glaze portion has at least two projected portions of different height with the plurality of heating resistor elements having a portion thereof disposed on at least the highest projected portion of the partial projected glaze portion with both electrode end portions of each of the heating resistor elements being disposed on the partial projected glaze portion other than the highest projected portion of the partial projected glaze portion so as to enable a recording dot to become narrow in the printing direction.