Rca Inc.

Howard G Scheible

Eugene Samuel Poliniak

Richard Joseph Himics

Charles B Carroll

Jon B Berkshire

An apparatus for wave soldering component leads to a conductor on a printed circuit board surface includes a fountain for forming a standing wave of hot molten solder. A pool of hot oil having a specific gravity lower than the solder floats in a depression in the surface of the solder adjacent to the standing wave. A printed circuit board whose surface is to be soldered is passed through the crest of the molten solder standing wave and then while the solder adhering to the component leads and conductor is still molten, into contact with the pool of hot oil.

Wave soldering apparatus and method

An improved method of reproducing a spiral groove pattern in the surface of a plastic disc wherein the intersections of the surface of a metal article generated during the replication process are filled in to form concave junctions.

Method for preparing stylus lapping discs

In preparing an electron beam resist film of a copolymer of an olefin and SO.sub.2, the steps of removing insoluble particles, drying the films under high vacuum and storing them in a moisture-free atmosphere are required to prevent cracking of the films during development.

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Livingston, NJ, United States of America

Howard G Scheible