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:
Jul. 08, 2003
Filed:
Sep. 26, 2001
Applicant:
Inventors:
Bangji Cao, Appleton, WI (US);
Oliver U. Heise, Menasha, WI (US);
Assignee:
Voith Paper, Inc., Appleton, WI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21C 5/02 ; G01N 3/334 ;
U.S. Cl.
CPC ...
D21C 5/02 ; G01N 3/334 ;
Abstract
A test method for analyzing an OCC fiber pulp, to quantify the content therein of contaminants creating bleed-throughs in a paper product formed from the pulp. A sample of the pulp is formed into a sheet, and bleed-throughs are created from the contaminants therein by hot-pressing the sheet. A dye is applied to the sheet, to enhance contrast between areas of the sheet having bleed-throughs and areas of the sheet not having bleed-throughs. The contrasted sheet is analyzed to determine the quantity of contaminants that create bleed-throughs.