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:
Aug. 18, 1981
Filed:
Jul. 30, 1979
Applicant:
Inventor:
Helmut Greve, Neumuenster, DE;
Assignee:
Dr.-Ing Rudolf Hell GmbH, Kiel, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
3461 / ; 346-11 ; 310317 ;
Abstract
A method for driving an ink jet comprising a compression chamber for the ink, the volume of which is charged by means of a piezo-electric transducer by expanding the chamber in preparation for printing, contracting the chamber to print, and expanding the chamber again in preparation for another cycle of printing.