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:
Apr. 05, 1983
Filed:
Jul. 29, 1981
Applicant:
Inventors:
Mitsuhiro Nakagaki, Hitachi, JP;
Osamu Isoo, Hitachi, JP;
Shinji Matsuoka, Hitachi, JP;
Takahiro Yamada, Ibaraki, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
346 75 ;
Abstract
An ink-jet recording head apparatus of charge modulation and continuous jet type comprising an annular ink pump chamber defined by the inner peripheral face of a cylindrical electrostrictive element, the annular side faces of a pair of elastic sealing members and the outer peripheral face of a fluid passage-providing insert, a tortuous inlet path connecting the ink pump chamber to a supply source of ink under pressure, and a tortuous outlet path connecting the ink pump chamber to an ink ejection orifice.