Pneumatic tire with specified outer surface
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United States of America Patent
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Jul 19, 2016
Grant Date -
Mar 21, 2013
app pub date -
Mar 25, 2011
filing date -
Mar 26, 2010
priority date (Note) -
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Abstract
A pneumatic tire has an outer surface with an arithmetical mean roughness Ra in the range of 0.1 μm to 0.6 μm when a reference length Lr is 20 μm, wherein the outer surface has an irregularity diameter in the range of 40-230 μm and an irregularity depth in the range of 3-22 μm. A method of manufacturing a tire vulcanization mold includes propelling spherical abrasive grains onto the surface of the mold under the condition that a propelling pressure is in the range of 0.1-0.6 MPa, so as to process the surface of the mold.
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