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:
Jun. 11, 1985
Filed:
Dec. 27, 1982
Stephen J Liker, Danbury, CT (US);
Exxon Research & Engineering Co., Florham Park, NJ (US);
Abstract
A method for improving droplet aim accuracy when operating an ink jet apparatus for ejecting ink droplets having velocities below 3.5 meters per second comprises the steps of first applying a primary electrical pulse to a transducer of the ink jet apparatus, for initiating the ejection of an ink droplet from an associated orifice via the production of a first pressure disturbance within the associated ink chamber of the ink jet; and thereafter prior to the break-off of the ink droplet from the orifice, applying an auxiliary pulse to the transducer, whereby the auxiliary pulse has a peak amplitude that is one-third that of the peak amplitude of the primary pulse, the latter causing a second pressure disturbance within the ink chamber of the ink jet, for causing the ink droplet to break off earlier and closer to the center of the orifice relative to the time and location of break-off in the absence of using the auxiliary pulse.