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. 26, 1984
Filed:
Dec. 09, 1981
Applicant:
Inventors:
Assignee:
Totoku Electric Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210409 ; 2104971 ; 210499 ;
Abstract
A filter is disclosed which is capable of withstanding repeated use by cleaning. The filter is so constructed that around a frame body is wound a filter wire at a constant slit space of less than 40 with a maximum error of 50%. A method for manufacturing such a filter is also disclosed which comprises winding, on a frame body, a filter wire paired with a spacer wire for keeping the slit space of said filter wire constant in such a manner that each turn is in contact with adjacent turns; and removing the spacer wire alone by chemical or physical means while holding these wires fixed so as to obtain a filter with a smaller slit space error.