Annular seal material and manufacturing method
AssigneeValqua, Ltd.
InventorsNaoki Osumi, Tomomitsu Mochizuki, Miki Otsuka
Life of this patent
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Abstract
The present invention relates to an annular seal material comprising a core and an outer layer covering a periphery of the core, wherein in the annular seal material, the outer layer has a parting line on each of an outer diameter side and an inner diameter side, and in the annular seal material, a thickness of the outer layer in at least a part of a portion where the parting line is present is smaller than a thickness of the outer layer in a portion where the parting line is absent. According to the present invention, provided are an annular seal material having a parting line having improved visibility and a method for manufacturing the same.
Claims6
An annular seal material comprising a core and an outer layer covering a periphery of the core, wherein the annular seal material has a parting line on each of an outer diameter side and an inner diameter side, the parting line being formed as outwardly convex in a cross-section of the annular seal material, and in the annular seal material, a thickness of the outer layer in at least a part of a portion where the parting line is present is smaller than a thickness of the outer layer in a portion where the parting line is absent, wherein the core is visible through the outer layer on the parting line.
Dependencies are inferred from the claim text.