Measuring and testing – Hardness
Patent
1997-02-03
1998-09-08
Dougherty, Elizabeth L.
Measuring and testing
Hardness
73 7, 73 81, G01N 300
Patent
active
058047069
ABSTRACT:
A system and method for measuring the mar resistance of a material test specimen includes a frame, a platform positioned on the frame, and a bar slidably mounted on the frame for vertical movement above the platform. The bar defines a lower end configured for holding a contact block at a predetermined angle relative to the platform, and an upper end configured for receiving and holding a mass of material. The test specimen is positioned on the platform, and the bar is moved downwardly toward the surface of the test specimen until the contact block comes to rest on the surface of the specimen. The specimen is then moved across the platform, the surface of the specimen is examined for mars, and the mar resistance is determined for the predetermined angle as the maximum amount of force, or pressure, which may be applied through the contact block to the surface of the specimen without marring the surface thereof.
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Dougherty Elizabeth L.
O'Sullivan Industries Inc.
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