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:
Oct. 31, 1978
Filed:
Aug. 15, 1977
Applicant:
Inventors:
Roland Frei, Widnau, CH;
Franz Gutmann, Rebstein, CH;
Peter Sieber, Widnau, CH;
Peter Koeppel, Widnau, CH;
Assignee:
Plaston AG, Kunststoffwerke Hans Frei & Sohne, Widnau, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
422274 ; 99312 ; 99314 ; 99315 ; 210409 ; 210456 ; 210477 ; 210481 ; 210482 ; 422261 ; 422266 ;
Abstract
A filter for liquids and particularly coffee comprises a container having a planar horizontal base formed with at least one filtrate drainage opening, and on its inner face formed with a plurality of radial ribs and a central support member which together support a generally planar filter element of thin sheet material in spaced parallel relationship to the base. In use the arrangement produces a toroidal circulation of liquid which prevents compaction of the filter cake and reduces clogging of the filter element.