Thin plate, method for manufacturing a thin plate, and apparatus for manufacturing a thin plate

摘要

The invention relates to a thin plate (1) whose both sides are provided with protrusions (2) while corresponding depressions (4) are provided on a side of the thin plate (1) opposite to the protrusions (2). According to the invention, on its first side the thin plate comprises protrusions (2) which extend uninterruptedly in a first direction and, between the protrusions (2), depressions (4) which extend at an angle with respect to the protrusions. An apparatus and a method for manufacturing sucha thin plate are also disclosed.