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. 31, 2001
Filed:
Mar. 01, 2000
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A longitudinal wave propagates in ink toward an opening. The surface of the ink is positioned at the opening and is curved. A surface wave is excited from an end of the liquid surface owing to a restoring force caused by surface tension of the ink. Assuming that the wavelength of the surface wave is &lgr;c, the diameter of the opening is established to be not smaller than 2m &lgr;c. The surface wave is generated from an edge of the opening and rapidly decreases due to the longitudinal wave. The surface waves caused by the longitudinal wave do not interfere with each other at the opening provided that certain conditions are established. Therefore, no complicated interference wave occurs on the surface of the ink, and the surface of the ink vibrates with a large amplitude in the vicinity of the edge of the opening.