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:
Feb. 22, 2005
Filed:
Jun. 24, 2002
Kenji Watari, Nagoya, JP;
Satoshi Takeda, Nagoya, JP;
Masumi Kobayashi, Nagoya, JP;
Makoto Uchida, Tokyo, JP;
Masamoto Uenishi, Otake, JP;
Noriaki Fukushima, Otake, JP;
Seiji Hayashi, Otake, JP;
Kenji Watari, Nagoya, JP;
Satoshi Takeda, Nagoya, JP;
Masumi Kobayashi, Nagoya, JP;
Makoto Uchida, Tokyo, JP;
Masamoto Uenishi, Otake, JP;
Noriaki Fukushima, Otake, JP;
Seiji Hayashi, Otake, JP;
Mitsubishi Rayon Co., Ltd., Tokyo, JP;
Abstract
The present invention provides a gas-permeable hollow fiber membrane having an inner diameter of 50 to 500 μm and a membrane thickness of 10 to 150 μm, which is preferably a composite hollow fiber membrane having a three-layer structure consisting of a nonporous layer having porous layers disposed on both sides thereof. Dissolved gases present in an ink can be removed by passing the ink through the bores of hollow fibers comprising such a hollow fiber membrane, and evacuating the outer surface side of the hollow fibers. This method makes it possible not only to degas inks with a slight pressure loss, but also to degas inks stably even if pressure changes occur during degassing.