Patent ID: 8714631
Filing Date: 2014-05-06
Classification: B21D,B62D,Y10T

Abstract:
1. A raised and recessed sheet material having a surface which is defined by a plurality of square sections arranged in two mutually perpendicular directions and which has a raised and recessed pattern, wherein an entire pattern of the surface is defined by a plurality of four basic configurations comprising, a basic configuration A defining pattern that is divided into three parts by a first partition line and a second partition line, the first partition line successively connecting points A a basic configuration B, having a pattern according to the basic configuration A, but wherein the first regions and the Z-shaped second region are arranged to be line-symmetrical with respect to the basic configuration A; a basic configuration C, having a pattern that is rotated 90° with respect to that of the basic configuration B, wherein the part of the square section located between the first and second partition lines is defined as a Z-shaped first region, and the parts of the square section not located between the first and second partition lines are defined as second regions; and a basic configuration D, having a pattern according to the basic configuration C, but wherein the Z-shaped first region and the second regions are arranged to be line-symmetrical with respect to that of the basic configuration C; wherein the plurality of the four basic configurations are arranged in the two mutually perpendicular directions while being abutted to each other at peripheral edges thereof, so that peripheral edges of the first regions of the basic configurations are abutted together, and peripheral edges of the second regions of the basic configurations are abutted together; wherein the raised and recessed pattern is formed on the entire surface by locating the first and second partition lines of each basic configuration in a first reference plane, which is an intermediate one of three mutually parallel imaginary reference planes which are spaced apart from each other in a vertical direction that is perpendicular to a plane of the sheet material, upwardly raising the first region of each basic configuration so that a raised portion of the first region is located in a second reference plane which is spaced upwardly from the first reference plane, and downwardly recessing the second region of each basic configuration, so that a recessed portion of the second region is located in a third reference plane, which is spaced downwardly from the first reference plane, or by locating the first and second partition lines of each basic configuration in one of two mutually parallel imaginary reference planes, which are spaced apart from each other in said vertical direction, and upwardly raising or downwardly recessing either one or both of the first and second regions of each basic configuration so that the raised portion or the recessed portion is located in the other reference plane.