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:
Nov. 06, 2012
Filed:
Aug. 27, 2009
Kaori Fujii, Atsugi, JP;
Kenichiroh Hashimoto, Yokohama, JP;
Kohzoh Urasaki, Kobe, JP;
Yuta Hiratsuka, Atsugi, JP;
Kaori Fujii, Atsugi, JP;
Kenichiroh Hashimoto, Yokohama, JP;
Kohzoh Urasaki, Kobe, JP;
Yuta Hiratsuka, Atsugi, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A liquid ejection head includes a nozzle formation member having a liquid repellent layer disposed on a droplet ejection face of a nozzle substrate in which one or more nozzle orifices is formed to eject droplets. The liquid repellent layer includes a first sub-layer and a second sub-layer. The first sub-layer contains a higher proportion of low-molecular-weight molecules than the second sub-layer. The second sub-layer contains a higher proportion of high-molecular-weight molecules than the first sub-layer. Both the first sub-layer and the second sub-layer are exposed on a surface of the nozzle formation member.