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:
Feb. 06, 1979
Filed:
Jul. 18, 1977
Charles L Cha, Xenia, OH (US);
Shou L Hou, Centerville, OH (US);
The Mead Corporation, Dayton, OH (US);
Abstract
Method and apparatus for use in an ink jet printing device to synchronously produce a plurality of uniform fluid filaments and droplets. A fluid reservoir is provided with an orifice plate having a plurality of orifices through which the fluid issues to produce the desired droplets. Above the liquid contained in the reservoir is a rigid piston suspended above the reservoir in contact with the liquid and having means sealingly engaging between the piston and the sides of the reservoir. The piston is moved translationally up and down by a plurality of electro-acoustical transducers which are secured to the piston in contact with its upper surface so as to produce pressure fluctuations in the fluid uniformly and synchronously over the plurality of orifices.