Funnel-and-neck sealing body for projection tube
AssigneeNippon Electric Glass Co., Ltd.
InventorsMamoru Kubosaka, Michiharu Eta
Life of this patent
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Abstract
A funnel-and-neck sealing body comprises a funnel having a substantially rectangular large opening to which a panel for projection tube is sealed, and a circular small opening; and a neck tube of substantially a cylindrical shape sealed to the small opening of the funnel. The neck tube has an electron gun installing region for installing an electron gun therein, and a yoke mounting region for mounting a deflection yoke externally thereon, wherein an outer diameter of the yoke mounting region is smaller than an outer diameter of the electron gun installing region.
Claims2
A funnel-and-neck sealing body for projection tube, comprising:
- a funnel having a substantially rectangular large opening to which a panel for projection tube is sealed, and a circular small opening;
- and
- a neck tube of substantially a cylindrical shape sealed to the small opening of the funnel,
- wherein the neck tube has an electron gun installing region for installing an electron gun therein, and a yoke mounting region for mounting a deflection yoke externally thereon, and wherein an outer diameter of the yoke mounting region is smaller than an outer diameter of the electron gun installing region;
- and
- wherein relationships of 2≦L/L1≦10 and 5≦/L2, are satisfied, where a length in a tube axis direction of the yoke mounting region is L1, a length in the tube axis direction of a connection region between the yoke mounting region and the electron gun installing region is L2, and a total length in the tube axis direction of the neck tube is L.
Dependencies are inferred from the claim text.