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, 2006
Filed:
Jun. 26, 2003
Anthony T. Walsh, Lancashire, GB;
Anthony T. Walsh, Lancashire, GB;
Tensar International Limited, Blackburn, GB;
Abstract
To make an oriented plastics material geogridin which oriented strandsform triangular meshes with a junctionat each corner and six of the strandsmeet at each junction, a plastics material sheet starting materialhas holesin an array of hexagons, opposite holesof each hexagon being aligned in the machine direction, and the starting materialis stretched first in the machine direction and secondly in the transverse direction. In the eventual geogrid, the centre portions of the hexagons in the starting materialform the junctions. The centres of the junctionsare slightly biaxially oriented, but at the edges of the junctions, the orientation of the edge of substantially each strandorruns around the edge of the respective junctionand into the edge of the next strandor. During the second stretch, restraint can be applied in the first stretch direction and discontinued before the material is allowed to relax in the second stretch direction. If desired, the procedure can be terminated after the first stretch, to produce a uniaxially-oriented geogrid. By using a starting materialwhich has through holesand weakened zones, it is possible to form the geogrid of the invention from a starting materialhaving a rectangular array of through holes