Patent ID: 6101859
Filing Date: 2000-08-15
Classification: A47B,B21D,Y10T

Abstract:
A die assembly for forming a pattern on a metal plate, comprising:a lower die unit having a lower forming face adapted to support the metal plate; andan upper die unit movable upward and downward so as to move toward and away from said lower forming face, said upper die unit having an upper metal contact face;one of said lower forming face and said upper metal contact face having a plurality of projecting punching elements of identical rectangular cross-section adapted to perforate said metal plate, and a plurality of embossing holes of identical rectangular cross-section;the other one of said lower forming face and said upper metal contact face having a plurality of punching slots of identical rectangular cross-section to register with and receive said punching elements when said upper die unit moves toward said lower die unit, and a plurality of projecting embossing elements of identical rectangular cross-section to project into said embossing holes when said upper die unit moves toward said lower die unit;said punching slots being aligned at regular intervals in parallel rows, each of said embossing elements bridging two adjacent ones of said rows of said punching slots, and having two opposing overlapping ends extending into said rows; andwherein each of said rows includes two of said punching slots, each of said embossing elements having one of said overlapping ends extending into one of said intervals of said rows, each of said overlapping ends having a width that extends in full length of one of said intervals of said rows.