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. 20, 2003
Filed:
Apr. 11, 2000
Nitto Denko Corporation, Osaka, JP;
Abstract
A spiral wound type separation membrane element includes a spiral wound type membrane component formed by superposing separation membranes of membrane materials supported on nonwoven fabric members on both surfaces of a permeated liquid passage forming member and bonding three sides with an adhesive thereby defining an envelope-like membrane, mounting an opening of the envelope-like membrane on a water collection pipe and bonding the same with an adhesive and spirally winding the envelope-like membrane around the outer peripheral surface of the water collection pipe along with a raw liquid passage forming member. The outer peripheral surface of the envelope-like membrane forming the spiral wound type membrane component is covered with a sheath member, and anti-telescopic members are mounted on both end surfaces of the envelope-like membrane respectively. Each of the aforementioned components forming the spiral wound type separation membrane element is made of heat-resistant alkali-resistant plastic.