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:
Aug. 24, 2021
Filed:
Dec. 26, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Rei Kurashima, Yokohama, JP;
Akihisa Iio, Yokohama, JP;
Takahiro Akiyama, Atsugi, JP;
Toru Nakakubo, Kawasaki, JP;
Noriyuki Kaifu, Atsugi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A driving method enables a liquid feeding apparatus using a driving element in a membrane shape to feed a liquid at high liquid feeding accuracy. To this end, a voltage applied to the driving element is controlled in such a way as to repeat a first period in which a first voltage is applied and a second period which is a longer period than the first period and used to effect a change between the first voltage and a second voltage lower than the first voltage, and in such a way as to switch between application and non-application of the first voltage during the first period.