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. 08, 1981
Filed:
Dec. 16, 1976
Fritz Strub, St. Gallen, CH;
Filtrox Maschinenbau AG, St. Gallen, CH;
Abstract
Apparatus and process settling layer filtration in which the liquid to be filtered is passed through a layer of settling layer particles settled directly upon a self-supporting support member, the support member is a plate or tube, e.g. candle filter tube, perforated by a multitudinous array of holes of circular cross-sectional shape having a diameter at their smallest point in the range of 50-250 microns, and larger than the largest dimension of the larger particles, with a density of 20-400 opening per sq. cm. of member surface area whereby the layer particles form over such circular opening dome-shaped arches exhibiting increased strength and stability during actual filtration. An effective technique for producing such members by means of laser beam drilling is disclosed.