Patent ID: 8833006
Filing Date: 2014-09-16
Classification: B21B,B21H,B30B,B44B,B60R,B62D,E04F,Y10T

Abstract:
1. Sheet metal plate for making floors, on which trucks are to run, said sheet having on its upper surface, a plurality of patterns, each pattern comprising one or more protrusions, called reliefs, said patterns being arranged periodically and discretely, the maximum height of said reliefs being between 0.2 and 1.5 mm, said reliefs having a friction surface, which is defined by the intersection of a relief with a plane (P) parallel to the surface of the sheet and located midway between the top and bottom of said relief and which, regardless of the direction in which it is measured, has an average width of at least 0.7 mm, characterized in that it comprises more than 3000 reliefs per m 2 , where said reliefs are arranged in a plurality of aligned groups, wherein the reliefs of each of said aligned groups have the same shape, the same orientation, and have their centers of gravity substantially aligned in a first direction, the minimum distance measured along said first direction between two adjacent reliefs of the same aligned group is always less than 6 mm, said aligned groups being so arranged that the minimum distance in the direction perpendicular to the first direction between two adjacent reliefs of two different aligned groups is less than 15 mm.