Glass funnel for cathode-ray tube

A glass funnel for a cathode-ray tube, comprising a funnel-like side wall, one end of the side wall being an approximately rectangular wide opening end thereof, having an approximately rectangular wide opening along a tube axis, the other end of the side wall being an approximately circular narrow opening end thereof, having an approximately narrow opening along the tube axis,

• the side wall having a body portion extending from the wide opening end toward the narrow opening end, and a yoke portion continuing from the body portion to the narrow opening end, wherein
• a step is provided at a junction between an outside surface of a first region and an outside surface of a second region of the body portion, so as to make a thickness of the first region thicker than a thickness of the second region, the first region extending from an outermost line of the body portion along the tube axis toward the narrow opening end to reach a position away from the outermost line by a predetermined distance h, the second region positioned at the side of the narrow opening end closer than the first region, and wherein
• a positioning reference portion used for sealing of the funnel to a glass panel for the cathode-ray tube is formed only on the outside surface of the second region.