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. 19, 1995
Filed:
Feb. 19, 1993
Tomoaki Takahashi, Tokyo, JP;
Yoshinaga Takahashi, Tokyo, JP;
Seikosha Co., Ltd., Tokyo, JP;
Abstract
A structure for an ink jet head comprising: an ink passage adapted to be supplied with ink; a nozzle communicating with the ink passage and positioned to have exit deep from the end face of the ink jet head; a hollow portion formed in the head end face to communicate with the nozzle exit and to have a larger diameter than the nozzle; and ink ejecting means disposed to correspond to the ink passage and energized electrically to eject the ink in the ink passage out of the nozzle end face through the hollow portion. As a result, the ink droplets can always be ejected in a correct direction by suppressing the fluctuation of their flowing direction, which might otherwise be caused by the breakage in the periphery of the opening in the head end face or by the ooze of the ink. Thus, the ejection characteristics are uniformed by absorbing the errors due to the cutting or grinding step.