An oval umbrella system for providing improved precipitation protection for individuals. Such inhibitors are members of the family of proteins bearing a collagen-like domain and a globular domain. In another aspect, a decoder determines whether reference pictures used by blocks are the same by comparing local picture identifiers during calculation of boundary strength. According to the invention, the sealing device has at least one element forming the contour of the feed opening, wherein a force acting in the direction of the die table is applied to the element.