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:
May. 27, 2014
Filed:
Mar. 08, 2011
Hideo Tamura, Kawasaki, JP;
Yoshiyuki Imanaka, Kawasaki, JP;
Koichi Omata, Kawasaki, JP;
Yuji Tamaru, Yokohama, JP;
Hideo Tamura, Kawasaki, JP;
Yoshiyuki Imanaka, Kawasaki, JP;
Koichi Omata, Kawasaki, JP;
Yuji Tamaru, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Performing a high-speed recording operation using a slender liquid discharge head substrate causes an uneven temperature distribution for each energy generating element because the center portion of the liquid discharge head substrate is more liable to accumulate heat than the end portion thereof, which may affect the quality of a recorded image. For this reason, the surface of the energy generating element which contacts liquid is separated into a first region and a second region in which a protection film is thicker than the one in the first region, and the area in the first region for the element positioned at the end portion of the array of the elements is made greater than that in the first region at the center portion thereof.