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:
Sep. 12, 1995
Filed:
Dec. 27, 1991
Eric G Rawson, Saratoga, CA (US);
Xerox Corporation, Stamford, CT (US);
Abstract
In response to the foregoing need, the cap structures that are provided by this invention for controlling the free ink surface levels of acoustic ink printers are characterized by having aperture configurations that are more or less equally subdivided into 'reflectively balanced' sectors that radially differ from each other by 1/4 of the dominant wavelength of the surface ripple waves that are generated by the droplet ejection process. The 1/4 wavelength difference in the radii of the two generally equal reflectively balanced fractional parts of these apertures causes the dominant frequency components of the retroreflected ripple waves to destructively interfere with each other in the critical central regions of the apertures.