Highly stable sipe, vulcanization form with such sipes, vehicle tires with a tread into which cuts are made by means of such sipes

摘要

The dividing lines (T) between raised and depressed areas are arranged in three groups and those of different groups intersect each other at 60 degrees to form a lattice of equal sided triangles. A similar structure is formed in a lamella with raised areas having a linear high point and depressed areas with a point-like tip or a depression with a linear low point and a raised area with point-like tip. Independent claims are included for: (a) a tire vulcanizing mold including the above lamella (1); and (b) a vehicle tire in which some or all cuts in the tread are formed by the lamellae. Preferred Features: Each raised area comprises an equal sided triangular base and a raised pyramid and each depression the reverse of this. The three base lines of each pyramid lie centrally between the tip of a raised pyramid and the lowest point of a depressed pyramid and each base line of a raised pyramid is adjacent to the base line of a depressed pyramid. A lamella may have raised and depressed pyramids with pointed tips coupled with raised and depressed pyramids having linear high or low points projecting from the flat reference surface along the dividing lines (T), the sequence of pyramids being one raised followed by three depressed instead of alternate raised and depressed. An alternative to the flat reference surface may be arched as a cylinder or polygonal prism or an alternating sequence of these creating a wave form.