North American Philips Corporation

Gte Sylvania Incorporated

North American Philips Consumer Electronics Corp.

Franklin G Reigel

Charles H Rehkopf

Samuel S Chung

David Benda

James R Stowe

Doanld L Siefker

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.

Aging process for cathode ray tubes

A process for fabricating cathode ray tubes having an envelope which contains an electron gun assembly and unwanted water vapor includes the steps of loading the cathode ray tube onto an exhaust machine, heating the cathode ray tube to an internal temperature greater than the condensation temperature of the water vapor during evacuation, and evacuating the water vapor from the envelope.

Cathode ray tube fabricating process

Growing community of inventors

Waterloo, NY, United States of America

Franklin G Reigel