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:
Mar. 18, 2003
Filed:
Nov. 30, 1998
Hiroyuki Ishikawa, Nisshin, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
An ink drop let jetting method and an apparatus are provided to easily and arbitrarily control a volume of ink droplets without changing the voltage value of a jet pulse. Thus, printing with a desired resolution may be achieved. When the volume of ink droplets (or printing density) is increased, the printing frequency of a timing period of the jet pulse is set to a reciprocal of an even-numbered multiple of the time T in which a pressure wave propagates within an ink chamber in one-way. Also, when the volume of ink droplets is decreased, the printing frequency is set to a reciprocal of an odd-numbered multiple of the time T in which a pressure wave propagates within an ink chamber in one-way. Alternatively, printing is executed at intermediate frequencies. According to this method, it becomes possible to print dots with an arbitrary resolution.