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:
Apr. 02, 2013
Filed:
Mar. 29, 2010
Yoshiharu Furuhata, Nagoya, JP;
Yoshiharu Furuhata, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya-shi, Aichi-ken, JP;
Abstract
A record head has an actuator which is selectively switchable between a small-capacity state in which the capacity of a pressure chamber connected to an outlet is Vand a large-capacity state in which the capacity of the pressure chamber is Vwhich is larger than V. A head driving unit selectively supplies, to the actuator, ejection drive signals which change the state of the actuator to eject liquid from the outlet and non-ejection drive signals by which the state of the actuator is changed from the small-capacity state to the large-capacity state and then returns to the small-capacity state, to the extent that no ejection of the liquid occurs from the outlet. The head driving unit successively supplies the non-ejection drive signals to the actuator while causing at least one of a first time and a second time to repeatedly increase and decrease in length, the first time being a time from an increase timing at which the state is changed from the small-capacity state to the large-capacity state to a decrease timing at which the state is changed from the large-capacity state to the small-capacity state, and the second time being a time ranging from an input of a non-ejection drive signal to an input of a directly-subsequent non-ejection drive signal.