Patent ID: 8307689

Claim:
A discrete die for forming a three-dimensionally curved surface, the discrete die comprising: a frame; a plurality of pins that are individually movable in a first longitudinal direction relative to the frame, the plurality of pins being arranged in parallel rows having a second longitudinal direction, and front ends of the plurality of pins define the three-dimensionally curved surface; a plurality of substantially plate-shaped separating elements, and at least one of the plurality of substantially plate-shaped separating elements is situated between the rows; a plurality of pressure elements located on the frame for pressing against the rows of pins and configured to push against the frame in a radial direction of the rows of pins; and wherein a surface of some of the plurality of the plate-shaped separating elements extends parallel to the first longitudinal direction, the surface being corrugated in the second longitudinal direction, at least during use of the discrete die.