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. 07, 1994
Filed:
Jul. 27, 1990
Applicant:
Inventors:
Takafumi Hirama, Ichikawa, JP;
Mitsugu Fujihira, Tokyo, JP;
Assignee:
Ichikawa Woolen Textile Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D04A / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
428280 ; 428286 ; 428288 ; 428296 ; 428300 ; 428302 ;
Abstract
A filter cloth having a needle felt layer laminated to a nonwoven fabric sheet made of ultrafine fibers. The fibers of the nonwoven fabric sheet have a fineness of 0.2 denier or less and the fabric sheet is formed by the melt blow method. The needle felt layer preferably has a weight of from 150 g/m.sup.2 to 900 g/m.sup.2, a longitudinal tensile strength of at least 20 kg/5 cm, a transverse tensile strength of at least 20 kg/5 cm and a bursting strength of at least 10 kg/cm.sup.2.