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:
Jun. 29, 2010
Filed:
May. 11, 2006
Takahiro Yamada, Hitachinaka, JP;
Satoru Tobita, Hitachinaka, JP;
Hitoshi Kida, Hitachinaka, JP;
Kenichi Kugai, Hitachinaka, JP;
Nobuhiro Kurosawa, Hitachinaka, JP;
Takahiro Yamada, Hitachinaka, JP;
Satoru Tobita, Hitachinaka, JP;
Hitoshi Kida, Hitachinaka, JP;
Kenichi Kugai, Hitachinaka, JP;
Nobuhiro Kurosawa, Hitachinaka, JP;
Ricoh Printing Systems, Ltd., Tokyo, JP;
Abstract
A method for manufacturing an inkjet recording head includes an ejecting step, a measuring step, dividing step and applying step. The ejecting step ejects test ink droplets and print ink droplets from nozzles. The measuring step measures ejection results of the test ink droplets. The dividing step divides a plurality of nozzles into a plurality of groups based on the ejection results. The applying step applies a group-based polarizing voltage determined for each group to the piezoelectric elements belonging to a corresponding group to polarize the piezoelectric elements so that ejection results of the print ink droplets fall in a predetermined range.