Invention Grant
US08491087B2 Circuit board for ink jet head, ink jet head having the same, method for cleaning the head and ink jet printing apparatus using the head
有权
用于喷墨头的电路板，具有该喷墨头的喷墨头，用于清洁头部和喷墨打印设备的方法
- Patent Title: Circuit board for ink jet head, ink jet head having the same, method for cleaning the head and ink jet printing apparatus using the head
- Patent Title (中): 用于喷墨头的电路板，具有该喷墨头的喷墨头，用于清洁头部和喷墨打印设备的方法
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Application No.: US13343773Application Date: 2012-01-05
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Publication No.: US08491087B2Publication Date: 2013-07-23
- Inventor: Toshiyasu Sakai , Ichiro Saito , Teruo Ozaki , Sakai Yokoyama , Takahiro Matsui , Takuya Hatsui , Kazuaki Shibata
- Applicant: Toshiyasu Sakai , Ichiro Saito , Teruo Ozaki , Sakai Yokoyama , Takahiro Matsui , Takuya Hatsui , Kazuaki Shibata
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Priority: JP2005-356314 20051209; JP2006-262702 20060927; JP2006-318864 20061127
- Main IPC: B41J2/165
- IPC: B41J2/165
Abstract:
In an ink jet head using a thermal energy for ejecting ink, this invention aims to reliably and uniformly remove kogations deposited on a heat application portion in contact with the ink. To realize this objective, the upper protective layer is arranged in an area including the heat application portion so that it can be electrically connected to serve as an electrode which causes an electrochemical reaction with the ink. The upper protective layer is formed of a material containing a metal which is dissolved by the electrochemical reaction and which does not form, on heating, an oxide film which hinders the dissolution. With this arrangement, a reliable electrochemical reaction can be produced to dissolve a surface layer of the upper protective layer, thereby removing kogations on the heat application portion reliably and uniformly.
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