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:
May. 15, 2001
Filed:
Feb. 04, 1999
Hideaki Haigo, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
An ink jet recording device includes an ink tank,and a print head,connected together by a circulation channel. The circulation channel is formed from the ink tank,ink supply tubes,a manifold,of a print head, and ink collection tubes,An ink circulation pump,is disposed along the ink supply tube,for performing a circulation purge, wherein ink is forcibly circulated ink through the circulation channel. During circulation purge, the rotational direction of the ink circulation pump,is reversed for a short period of time, so that ink flows in a direction opposite of the normal flow direction. As a result, air bubbles are loosened from where they cling on the side surfaces of the ink channel. Because the air bubbles are more easy to remove, the air bubbles are removed by flow of ink during the circulation purge. The air bubbles are transported to and collected in the ink tank, whereupon they separate from the ink due to their buoyancy.