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:
Aug. 17, 1993
Filed:
Dec. 07, 1990
Applicant:
Inventors:
Maurus Pellhammer, Ravensburg, DE;
Wolfgang Ehmcke, Ravensburg-Oberhofen, DE;
Assignee:
Sulzer-Escher Wyss GmbH, Ravensburg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
2191 / ; 291636 ; 219 58 ;
Abstract
A process for manufacturing a slotted hole screen made by mechanically joining a plurality of longitudinal members to a plurality of cross bars reduces joint roughness, burrs and recesses by including a step of covering the joints with a covering material which has a smooth exterior surface. The covering material is liquefied and has sufficient surface tension to form the smooth surface. In an alternative embodiment, the joints in a slotted screen formed by welding a plurality of longitudinal members to a plurality of cross bars are smoothed by selectively remelting the joints to form the smooth exterior.