Patent ID: 6933666

Claim:
A glass panel for a color television picture tube comprising: a substantially rectangular face portion provided with an effective screen; a skirt portion continuing to a periphery of the face portion through a blend R portion; a seal end surface formed on an open end of the skirt portion; pin-seal portions for stud pins for retaining a shadow mask, formed on an inner wall surface of the skirt portion, wherein flat surfaces are formed at the pin-seal portions, each of the flat surfaces being substantially parallel with a first direction along a panel center axis and substantially parallel with a second direction along a line across two neighboring corners of the skirt portion wherein said two neighboring corners are on the inner wall surface where the flat surface located, a width of the flat surfaces in the second direction gradually increases in a direction form the face portion to the seal end surface as far as at least an end of the stud pin at the side of the face portion.