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:
Sep. 30, 1980
Filed:
Nov. 23, 1977
Applicant:
Inventor:
Tadashi Hirakawa, Kusatsu, JP;
Assignee:
Teijin Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D04H / ;
U.S. Cl.
CPC ...
428 91 ; 156 82 ; 2103 / ; 2103 / ; 210505 ; 210510 ; 210507 ; 428198 ;
Abstract
A fabric filter having a low pressure drop, a high collection efficiency and an excellent cleanability is produced by raising one surface of a woven or knitted fabric comprising thermoplastic polymer fibers, to form a fibril layer containing therein the thermoplastic polymer fibrils, bringing the fibril layer into contact with a heating medium to form networks of fuse- bonded thermoplastic polymer fibrils on the fibril layer surface, and optionally, calendering the fabric.