E.i. Dupont De Nemours and Company

Donald K Pusey

Frank S Fountain

Allan F Falcoff

Theron Robert Holt

Joseph Cyril Osborne

James William Roxlo

Lewis Charles Goodrich

Keith A McCloy

A device for measuring the thickness of a wet or dry paint film applied on a substrate without contacting the film is disclosed. The device uses an optical sensor positioned centrally and coaxially with an inductive eddy-current proximity sensor. The optical sensor measures the distance between the device and the upper surface of the paint film at specular reflection angle. The proximity sensor measures the distance between the device and the upper surface of the substrate. The two distances measured, when compared, produce the film thickness value. The device is capable of accurately measuring thickness of various paint films, such as flat, glossy and metal-flake containing paint films.

Non-contact wet or dry film thickness measuring device

A method of determining the angular and radial location of defects causing dropouts on a magnetic disc, and using this information to position individual dropouts in the field of view of a microscope.

Method of locating and inspecting dropouts on a magnetic disc

An apparatus and method for locating dropouts. Information as to dropouts in a length of tape is stored in memory and then used to compute data as to location of the dropouts. The data is used to position a tape-inspecting instrument such as a microscope over successive dropouts.

Tape inspection apparatus

An apparatus and method for locating dropouts. Information as to dropouts in a length of video tape is stored in memory and then used to compute data as to location of the dropouts. The data is used to position a tape-inspecting instrument such as a microscope over successive dropouts.

Apparatus and method for locating dropouts

In an apparatus for continuous draw-off of yarn from a package at a measured rate and under regulated tension, the yarn can either be passed to a waste receptacle for a predetermined length of time or can be metered to a scale for subsequent determination of yarn weight per unit length (denier). Diversion of the running yarn from one path to the other is achieved without affecting yarn draw-off rates and tensions.

Growing community of inventors

West Grove, PA, United States of America

Donald K Pusey