Geometrical instruments – Distance measuring – Single contact with a work engaging support
Patent
1998-09-09
2000-10-31
Gutierrez, Diego
Geometrical instruments
Distance measuring
Single contact with a work engaging support
33833, 33832, 33573, 335671, 269 74, 269 76, G01B 506
Patent
active
061383740
ABSTRACT:
The invention is directed to a method and apparatus for determining coating thickness on a substrate. The apparatus comprises a jig and fixture combination where the jig includes a moveable stop that fixes a position for placing a substrate specimen in the fixture, and where the fixture includes an inclined plane for receiving the substrate specimen at a predetermined angle .theta. that slopes in a downward direction to engage the moveable stop. A clamp that holds the substrate specimen at a fixed position against moveable stop and inclined plane when said fixture is separated from said jig to determine coating thickness on the substrate. The method for determining coating thickness using the combination jig and fixture arrangement includes placing and clamping a substrate specimen at a predetermined position in the fixture in response to a bound fixed by the moveable stop of the jig, grinding a measuring surface along a portion of the substrate specimen that is clamped in the fixture, and repositioning the substrate specimen to place the measuring surface prepared by grinding in a plane parallel to the focal plane of a measuring device used to determine coating thickness.
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Technical Bulletin "Coating Weight and Thickness Designations for Coated Steel Sheets" Copyright 1995 Bethlehem Steel Corporation.
Paul N. Gardner Company, Inc., 1994 Edition, pp. 666-677.
ASTM Designation: D 5796-95 Standard Test Method for Measurement of Dry Film of Thin Film Coil-Coated Systems by Destructive Means Using a Boring Device.
Donchez George E.
Friedersdorf Fritz J.
Bethlehem Steel Corporation
Guadalupe Yaritza
Gutierrez Diego
Masteller, Jr. Harold I.
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