Liquid ejection head

Details Liquid ejection head Liquid ejection head

2006-03-28

2009-06-02

Luu, Matthew (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

07540595

ABSTRACT:
The liquid ejection head comprises: a pressure chamber which accommodates liquid to be ejected through an ejection aperture; a diaphragm which constitutes a wall of the pressure chamber; a supply port which is formed as an opening section in a portion of the diaphragm; a supply flow channel which is provided between the supply port and the pressure chamber; and a common liquid chamber which accommodates the liquid to be supplied to the pressure chamber through the supply port and the supply flow channel and is arranged on a side of the diaphragm reverse to a side thereof adjacent to the pressure chamber, wherein the diaphragm has a tongue section, a portion of a perimeter of the tongue section being surrounded by the supply port, the tongue section constituting a portion of a wall of the supply flow channel, a portion of the diaphragm forming the tongue section having a laminated structure of an upper layer on the side adjacent to the common liquid chamber and a lower layer on the side adjacent to the pressure chamber, a coefficient of linear expansion α1of the upper layer and a coefficient of linear expansion α2of the lower layer satisfying a relationship of α1<α2, at least a portion of the tongue section being bendable in a direction to change a size of the supply flow channel.

REFERENCES:
patent: 10-217465 (1998-08-01), None
patent: 11-99666 (1999-04-01), None
patent: 11314363 (1999-11-01), None
patent: 2003-136690 (2003-05-01), None

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