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. 07, 1987
Filed:
Mar. 10, 1986
Giandomenico Dagna, Ivrea, IT;
Ing. C. Olivetti & C., S.p.A., Ivrea, IT;
Abstract
An ink jet printer is provided with an ink reservoir including a laminar substrate covered on the outer surface of a plurality of metal coatings forming individual electrodes associated with a plurality of nozzles. These latter are formed of holes passing through the substrate and the coatings. An additional metal coating is provided in the inner surface of the substrate and includes a portion to provide a common electrode and a plurality of portions connected with the coatings of the outer surface. The reservoir has a chamber for the evacuation of gases which form during the printing operation, the chamber having an associated Venturi pump acting as a vacuum source. The electrical energization circuit for the printer includes an adjustment member for effecting controlled variation in the energy of the pulses which cause the ejection of ink sprays through the printer nozzles.