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:
Dec. 14, 1982
Filed:
Sep. 22, 1980
Applicant:
Inventor:
Haruhiko Koto, Shiojiri, JP;
Assignees:
Shinshu Seiki Kabushiki Kaisha, Nagano, JP;
Kabushiki Kaisha Suwa Seikosha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
3461 / ;
Abstract
An ink jet printing head of simple construction includes two supply channels and a pressure chamber which are substantially coplanar with the nozzle. A piezoelectric element acts to decrease the pressure chamber volume and eject an ink droplet from the nozzle. A smoothly curved supply channel inlet assures that vapor in the pressure chamber is easily removed. Ink refills the pressure chamber from a transverse supply pipe feeding two supply channels when the chamber volume increases after ejection of a drop.