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. 11, 2000
Filed:
Nov. 12, 1997
Seiichi Kanemoto, Nagoya, JP;
Atsushi Hirota, Nagoya, JP;
Atsuo Sakaida, Gifu, JP;
Yoshiyuki Ikezaki, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
A hot melt ink jet print head in which ink can be circulated without an ink level difference between a main chamber and a sub chamber. The main chamber and the sub chamber of an ink tank is connected via a channel. The main chamber is connected to a nozzle head via an outgoing channel. Also the sub chamber is connected to the nozzle head via a returning channel. Two valves are provided inside of the sub chamber, each for closing either one of the channel and the returning channel. Normally, the returning channel is closed by the valve, and the channel is opened, so that ink can flow from the sub chamber to main chamber and further to the nozzle head. However, during the purging operation, the channel is closed with the valve, and the returning channel is opened, so that the ink can flow from the main chamber to the sub chamber via the nozzle head.