초록 ▼

To avoid the waste of die-cutting a plurality of circular blanks of identical diameter from rectangular sheet material, the material is formed into non-rectangular sheets of parallelogram trapezoid, or equilateral triangle configuration, which have a predetermined length and width substantially equa

To avoid the waste of die-cutting a plurality of circular blanks of identical diameter from rectangular sheet material, the material is formed into non-rectangular sheets of parallelogram trapezoid, or equilateral triangle configuration, which have a predetermined length and width substantially equal to a multiple of the diameter of the circles. The circular dies of a gang-die cutter are juxtaposed in a series of laterally extending rows in parallelism, longitudinally of the die cutter, the rows being at an angle of 60°to the longitudinal edges of the sheets. The sheets and the die pattern thus both are of parallelogram trapezoid, or equilateral triangle, outline.

대표청구항 ▼

The method of cutting a plurality of circles of identical diameter from elongated sheets by means of a gang type die cutter, said method comprising the steps of providing a plurality of said elongated sheets, each with a pair of longitudinal edges at a predetermined width apart and a pair of lateral

The method of cutting a plurality of circles of identical diameter from elongated sheets by means of a gang type die cutter, said method comprising the steps of providing a plurality of said elongated sheets, each with a pair of longitudinal edges at a predetermined width apart and a pair of lateral edges each at a predetermined length apart, said predetermined width and length being substantially an exact multiple of the diameter of said circles plus trim, the lateral edges of each said sheet defining an acute angle of about sixty degrees with a longitudinal edge thereof to form the outline of said sheet into parallelogram, trapezoid, or equilateral triangle, configuration; arranging the circular dies of said gang type die cutter in closely packed, laterally extending rows, juxtaposed successively lengthwise of said cutter, the centres of each successive lateral row of said circular dies being aligned at an acute angle of about sixty degrees from a longitudinal edge of said cutter and the overall width and length of said rows of cutters being substantially an exact multiple of the diameter of said circles plus trim spacing; and then individually and successively die cutting lifts of superposed said sheets by means of said cutter to simultaneously form a plurality of circles of identical diameter with minimum waste.