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:
Feb. 21, 1984
Filed:
Jan. 15, 1982
James D Logan, Whitman County, WA (US);
Morrison-Knudsen Forest Products Company, Inc., Boise, ID (US);
Abstract
Discrete elongated pieces of material are electrostatically oriented by cascading a multitude of such pieces through an orienting zone for deposit as a mat on an insulating belt or mat-support surface. An electrical current is passed through the mat to produce a directional electric field immediately above the mat parallel to the electric field of the orienting zone. Distortions in the electric field which result as the thickness of the mat increases or as the width of the orientation cell is reduced are avoided by varying the strength of the electric field along the length of the mat being formed to achieve a surface potential distribution (electric field) at the upper surface of the mat in the mat-forming zone which is essentially equal to the electric potential distribution between the vertically charged plates of the orienting zone.