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:
Apr. 03, 1990
Filed:
Feb. 17, 1989
Applicant:
Inventors:
Keith W Knudsen, Neenah, WI (US);
Thomas J Ziolkowski, Neenah, WI (US);
William C Bean, Larsen, WI (US);
Assignee:
James River-Norwalk, Inc., S. Norwalk, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H / ;
U.S. Cl.
CPC ...
162129 ; 162130 ; 162133 ; 162149 ;
Abstract
A method of producing a multi-ply paperboard comprising at least one ply high bulk fibers sandwiched between at least two plies of conventional papermaking fibers. In a preferred embodiment, high bulk fibers characterized by twists, kinks and curls are produced by mechanical deformation without substantial fibrillation or breakage of the fibers, as by dry hammermilling or wet milling of the fibers. An aqueous foam furnish is preferred for laying the ply containing high bulk fibers.