Patent ID: 7798610
Filing Date: 2010-09-21
Classification: B41J

Abstract:
1. A printing head for ejecting ink comprising: a cantilever element having a free end and a fixed end, said cantilever element making a bending action to generate pressure for ejecting the ink; and a liquid chamber in which said cantilever element is provided so that said cantilever element makes the bending action and which is divided into an upper chamber and a lower chamber having an ejection opening by a plane including a plane of said cantilever element, the plane of said cantilever element extending in directions perpendicular to a direction of ink ejected by the bending action, wherein a communicating opening for communicating the upper chamber with the lower chamber is provided in a neighborhood of the fixed end of said cantilever element, and in a part other than the communicating opening, the upper chamber communicates with the lower chamber through a gap the flow resistance of which is greater than that of the communicating opening.