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:
Aug. 18, 1981
Filed:
Jan. 19, 1979
Thomas E Peters, Boise, ID (US);
Joseph S Bleymaier, Columbia, MD (US);
Morrison-Knudsen Forest Products Company, Inc., Boise, ID (US);
Abstract
Continuous-line methods and apparatus for orientation and uniform deposition of fibers to enhance directional properties in and production rates of fiberboard produced from lightweight fibrous furnish. A plurality of elongated rod electrodes are predeterminedly spaced over the area of fiber deposition to establish an electric field exerting a torque on discrete fibers tending to orient longitudinal axes of the fibers in the plane of the mat being formed and aligned with the machine forming direction for such mat. Placement of the rod electrodes and controlled rotation about their longitudinal axes yield a combination of electrical and mechanical forces to provide desired orientation and uniformity of deposition over the full area of deposition. Directional properties measured in the compacted and cured fiberboard establish that effective orientation ratios of longitudinal axes of fibers in the preferred direction of 1.2:1 and higher are made available working with lightweight fibrous wood material refined under steam pressure and are available at production rates which are commercially economic.