North American Philips Corporation

North American Philips Consumer Electronics Corp.

Samuel S Chung

Charles H Rehkopf

Franklin G Reigel

Doanld L Siefker

James R Stowe

In the processing of cathode ray tubes, both the incidence of dark center cathode and residual gas can be reduced by including the step of scanning the mask and screen of the tube with a weak, defocused electron beam, carried out after getter flashing and preferably prior to aging.

Weak beam scanning of cathode ray tubes

An improved aging process for a cathode ray tube in which the main focusing grid (G3) is aged at a potential below that of the G2 grid, resulting in significantly reduced incidence of dark center cathode.

Growing community of inventors

Liverpool, NY, United States of America

Samuel S Chung