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:
Aug. 26, 2008
Filed:
Nov. 29, 2005
Naoto Iwao, Nagoya, JP;
Naoto Iwao, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya-shi, Aichi-ken, JP;
Abstract
An ink jet printer is provided with an ink jet head and a controller. The ink jet head comprises a nozzle, an ink chamber communicating with the nozzle, a pressure chamber located between the nozzle and the ink chamber, and an actuator that changes volume of the pressure chamber. The controller controls the actuator to perform a first performance. The first performance includes a first change in which the volume of the pressure chamber increases and a second change in which the volume of the pressure chamber decreases. A period from the first change to the second change is 2/3×AL or below, or within a range between (2s−1/2)×AL and (2s+2/3)×AL, s is a positive integer. Discharging speed of ink discharged from the nozzle is substantially maximum if the period from the first change to the second change is set to AL.