Spike for motor vehicle tires including out-of-round tip and out-of-round root and upper part in twisted relation

A process for producing a snow tire having a running surface, comprising:

• injecting a plurality of spikes using injection pipes into the running surface, each of said plurality of spikes comprising:
• an out-of-round, longitudinal, plate-like spike root, wherein the greatest extension of the spike root defines a longitudinal axis, and
• an out-of-round, longitudinal spike upper part, wherein the greatest extension of said spike upper part defines a longitudinal axis, said spike upper part being concentric with respect to said spike root, further wherein the upper part consists of a thicker spike part and a tip sitting thereon, said tip having an out-of-round cross section, a longitudinal axis of the tip is oriented essentially parallel to the longitudinal axis of the thicker part, said tip being concentric with respect to said thicker spike part and said root,
• the spike root and the spike upper part are twisted in relation to each other, so that the longitudinal axis of the spike root together with the longitudinal axis of the spike upper part encloses an angle varying from zero,
• wherein each of the injection pipes, in which the spikes are accelerated prior to the impact on a periphery of the running surface, have such a clear cross section that this cross section surrounds the top of each of the spikes to be mounted with slight play, in order to guide the spike securely free of torsion and seat it in the proper angular position, and
• wherein in an edge area of the running surface of the tire, spikes are arranged such that the longitudinal axis of the root and the longitudinal axis of the spike upper part enclose an angle that varies from each of 0° and 90°.

A snow tire having a running surface made by a process, comprising:

• injecting a plurality of spikes using injection pipes into the running surface, each of said plurality of spikes comprising:
• an out-of-round, longitudinal, plate-like spike root, wherein the greatest extension of the spike root defines a longitudinal axis, and
• an out-of-round, longitudinal spike upper part, wherein the greatest extension of said spike upper part defines a longitudinal axis, further wherein the upper part consists of a thicker spike part and a tip sitting thereon, said tip having an out-of-round cross section, a longitudinal axis of the tip is oriented essentially parallel to the longitudinal axis of the thicker part, said tip being concentric with respect to said thicker spike part and said root,
• the spike root and the spike upper part are twisted in relation to each other, so that the longitudinal axis of the spike root together with the longitudinal axis of the spike upper part encloses an angle varying from zero,
• wherein each of the injection pipes, in which the spikes are accelerated prior to the impact on a periphery of the running surface, have such a clear cross section that this cross section surrounds the top of each of the spikes to be mounted with slight play, in order to guide the spike securely free of torsion and seat it in the proper angular position, and
• wherein in an edge area of the running surface of the tire, spikes are arranged such that the longitudinal axis of the root and the longitudinal axis of the spike upper part enclose an angle that varies from each of 0° and 90°.