Abstract: Means for deterring the build-up of a deleterious negative charge on the neck portion of a cathode ray tube is provided for utilization in especially those tubes wherein the electron gun structure is particularly close to the glass surface of the encompassing neck. The charge inhibiting means is formed of a circumferential band of insulative oxide material having a roughened topography to provide a discontinuous surface condition to break-up the deposition of metallic sublimation resultant from high temperature tube processing and conditioning. The band is oriented substantially in the rearward section of the neck on the portion thereof substantially encompassing the cathode region of the gun structure.

Abstract: Improved means are provided for supporting a container of effusive material within a cathode ray tube wherein the container is located at the terminal end of a resilient longitudinal positioning member attached to the electron gun assembly. The supportive means includes at least one support placement means which projects forwardly from the container as a directional continuation of the positioning member. Associated with the support placement means is a rotatable member, the peripheral surface of which tracks in a direction common with the directional trend of the positioning member. The rotatable member, which may be formed of insulative material, effects facile positioning with a minimum of abrasion and positive spatial supportive placement of the container relative to the wall of the envelope.