Abstract: A wet film applicator is movable across a surface such that a blade edge extending transversely of the direction of movement and supported with a clearance above the surface causes a film of flowable substance, positioned ahead of the blade edge, to be spread as a film over the surface. The blade is adjustable in height so as to raise and lower opposite ends of the blade by the same amount for spreading films with selected constant thickness. The blade is also adjustable in height so as to raise and lower opposite ends of the blade by different amounts for spreading wedge-shaped films at selected shapes.

Abstract: An apparatus for use in the measurement of the thickness of a wet coating applied to a supporting surface includes a measuring disk having a support axis, a circumferential edge, the radial distance between the support axis and the circumferential edge varying at points along at least a portion of the edge, and indicia indicative of a coating thickness around that portion of the circumference. A disk support member supports the disk in a plane which is substantially perpendicular to the surface of the coating and permits rotation of the disk about the support axis within the plane so as to permit a measurement of the thickness of the coating to be made. The disk support member includes at least one support leg adapted to penetrate the coating and rest on the supporting surface to position the disk in the substantially perpendicular orientation with respect to the coating surface and to maintain the disk in the orientation while a measurement is made.

Abstract: A guarded ring tensioned thickness standard for use with coating thickness gages includes a ring formed of a first material having a coefficient of thermal expansion which is less than the coefficient of thermal expansion of a second material from which a diaphragm is formed. The diaphragm is bonded to the ring at a temperature which is elevated with respect to room temperature so that after the standard has cooled to room temperature, the diaphragm is supported in tension on the ring. The diaphragm is formed of a thickness corresponding to the estimated thickness of a coating to be measured and may be used both in the calibration of a coating thickness gage and in the actual measurement of uncured powdered coatings.