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:
Mar. 08, 1977
Filed:
Apr. 28, 1975
Per Viking Peterson, Sundsvall, SW;
SCA Development Aktiebolag, Sundsvall, SW;
Abstract
A method for the treatment of the surface of refining elements or segments is disclosed. The refining segment surfaces, which generally include grooves and ridges, are normally subjected to mechanical polishing or grinding prior to use, thereby smoothing the surface of the ridges of the refining segments and depositing a surface layer of material thereon. This surface layer is removed according to the invention disclosed, by either mechanical or chemical means, in order to permit the uniform wear of the ridges during use, and to roughen that surface. This may be accomplished chemically, for example, by such processes as electrolysis and etching with various acids.