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. 13, 2004
Filed:
Oct. 22, 2002
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In a liquid ejecting head having a first liquid flow path communicating with an ejecting port for ejecting a liquid to be ejected and an element substrate having a heating element for forming a bubble from a bubble forming liquid as well as including a second liquid flow path corresponding to the first liquid flow path and a movable separation membrane for substantially separating the first liquid flow path and the second liquid flow path corresponding to the first liquid flow path from each other at all times, the liquid ejecting head includes an atmosphere communication port facing the atmosphere for communicating the second liquid flow path with the atmosphere, and an atmosphere communication path having an atmosphere communication path introduction port facing the second liquid flow path, wherein the atmosphere communication port is formed through the same surface as that of the ejecting port, whereby the liquid ejecting head can remove remaining bubbles in the bubble forming liquid by a simple arrangement as well as improve a liquid ejecting efficiency by effectively transmitting the pressure of a bubble formed in the bubble forming liquid to the liquid to be ejected.