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:
Nov. 12, 1991
Filed:
Dec. 14, 1989
Applicant:
Inventors:
David E Chupka, Middletown, OH (US);
Joseph P Constiner, Monroe, OH (US);
Christopher M Vitori, Middletown, OH (US);
Assignee:
The Black Clawson Company, Middletown, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B23P / ;
U.S. Cl.
CPC ...
21049701 ; 291638 ; 162251 ; 209270 ; 209273 ; 209306 ; 209397 ; 210415 ; 210498 ; 21912167 ;
Abstract
Screen cylinders, and methods of making the same for use in removing contaminant particles from papermaking stock, have a seamless cylinder body and the openings or slots therethrough are formed by directing a focused laser beam at an outer surface while focusing the beam intermediate the outer an dinner surfaces to form an opening or slot with tapered walls. Wear bars may be applied to the inside surface as a bead of weld material. The seamless cylindrical body is formed by centrifugal casting or by cold roller extrusion.