| 摘要 |
An envelope of a cathode ray tube includes a substantially rectangular flat face plate, and a substantially rectangular flat rear plate opposed to the face plate with a side wall being interposed therebetween, a plurality of funnels extending from the rear plate. A plurality of necks extend from the respective funnels, and a plurality of electron guns are respectively arranged in the necks. A plurality of plate support portions are arranged between the rear plate and the face plate, so as to support the rear plate and the face plate against an atmospheric pressure. Each plate support portion includes a support body made of glass which is integrally welded with the rear plate and extends from the rear plate toward the face plate, and a distal end portion jointed to the extending end of the support body and being in contact with the face plate.
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