Patent ID: 7540939

Claim:
A sheet of tissue paper comprising at least one first embossed zone including protrusions on one side corresponding to alveoles on an opposite side, the alveoles in said at least one first embossed zone having a truncated pyramidal shape with pyramidal sides and having a substantially polygonal base; and at least one unembossed zone; wherein said alveoles are configured as at least one array and adjacent alveoles in said array have mutually facing pyramidal sides, and said mutually facing pyramidal sides of two adjacent alveoles subtend a bridge having rectilinear or substantially rectilinear edges of length L greater than a maximum width D of the bridge, wherein said bridge subtends a path between two unembossed zones and at least two bridges connected to each other subtend a path between two unembossed zones that are separated by said array of said alveoles.