Patent ID: 8042923
Filing Date: 2011-10-25
Classification: B41J

Abstract:
1. A liquid ejecting head comprising a nozzle having an energy acting chamber provided with a heating element generating heat energy utilized to eject a liquid, and a liquid supply port communicating with the nozzle, wherein an ejection port portion communicating with the energy acting chamber is formed to eject the liquid to which heat energy is applied by the heating element, the ejection port portion has a first ejection port portion communicating with atmosphere and a second ejection port portion formed between the energy acting chamber and the first ejection port portion, the second ejection port portion has a larger sectional area than the first ejection port portion in a direction orthogonal to an ejection direction in which the liquid is ejected, when each of the energy acting chamber and the second ejection port portion is partitioned by a first virtual plane into an area positioned on a first side of the first virtual plane and an area positioned on a second side of the first virtual plane, the energy acting chamber has a larger volume in the first side area than in the second side area, and the second ejection port portion has a smaller volume in the first side area than in the second side area, and the first virtual plane is parallel to both a supply direction of a liquid flowing from the liquid supply port to the energy acting chamber and the ejection direction, and passes through a center of the heating element to divide each of the energy acting chamber and the second ejection port portion into two parts in an orthogonal direction orthogonal to the supply direction.