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:
Jul. 08, 1986
Filed:
Nov. 19, 1984
Applicant:
Inventors:
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
3461 / ;
Abstract
A plate, through which several ink ducts extend, merges at a flat side of the plate into nozzles and at the opposite side into separated pressure chambers. The printing head has a diaphragm plate common to all pressure chambers, connected to a one-piece piezoceramic plate, which has an embossed part overlying each pressure chamber. Film electrodes are provided on each embossed part, extending above and beyond the area of the pressure chamber. Electrical connections are made to the film electrodes outside the area above the pressure chambers so that the mass of the electrical connections does not affect the resonant frequency.