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. 11, 2006
Filed:
Apr. 29, 2003
Henry Chou, Neenah, WI (US);
Hazen C. Thomas, Green Bay, WI (US);
Andrew C. Palm, Menasha, WI (US);
Terry P. Witkowski, Neenah, WI (US);
Robert J. Clausing, Neenah, WI (US);
Stephanie Keen, Appleton, WI (US);
David J. Dipietro, Appleton, WI (US);
Henry Chou, Neenah, WI (US);
Hazen C. Thomas, Green Bay, WI (US);
Andrew C. Palm, Menasha, WI (US);
Terry P. Witkowski, Neenah, WI (US);
Robert J. Clausing, Neenah, WI (US);
Stephanie Keen, Appleton, WI (US);
David J. DiPietro, Appleton, WI (US);
Fort James Corporation, Atlanta, GA (US);
Abstract
A method of processing papermaking fiber includes characterizing the initial color of the pulp and the color of the pulp after treatment with a phloroglucinol stain. The color response of the pulp to the stain has been found to be a better indicator of processing needs for secondary pulps in particular and in any event is selective for untreated groundwood as opposed to conventional groundwood identification methods. The color difference is used to target a suitable product for the pulp, to aid in bleaching/deinking strategy or to enable optimization of fiber blending for particular products. In a preferred embodiment the process includes determining changes in CIE L*, a*, b* and brightness values before and after staining of the pulp.